CN119541717A - Carbon fiber wrapped rotor selection verification method, device, equipment and storage medium - Google Patents
Carbon fiber wrapped rotor selection verification method, device, equipment and storage medium Download PDFInfo
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Abstract
The application discloses a carbon fiber wrapped rotor model selection verification method, a device, equipment and a storage medium, which relate to the technical field of motors and are characterized in that parameters of a motor rotor and parameters of carbon fiber wrapped are obtained; the method comprises the steps of carrying out digital equivalent and parameterization encapsulation according to the parameters of the motor rotor and the parameters of the carbon fiber encapsulation to obtain parameterized encapsulation files, calculating according to the parameterized encapsulation files to obtain analysis results, verifying the current type of the carbon fiber encapsulation rotor according to the analysis results, solving the problem of how to quickly select proper carbon fiber materials in the technical realization process of the carbon fiber encapsulation rotor, shortening the development period and improving the development efficiency.
Description
Technical Field
The application relates to the technical field of motors, in particular to a carbon fiber wrapped rotor model selection verification method, a device, equipment and a storage medium.
Background
In the current automobile market, the iteration speed of motor technology is increasingly accelerated, and large automobile host factories and suppliers at home and abroad provide high-speed motor products so as to meet the requirements of future vehicle type development. Among these demands, motors are gradually moving toward high rotational speeds, high power, high efficiency, and high power density. As a core component of the electric drive assembly, the reliability of the motor rotor faces more stringent challenges with a substantial increase in rotational speed. In order to improve the reliability of the motor rotor, the vehicle electric drive system gradually adopts an innovative structural form of a carbon fiber protective sleeve. The carbon fiber material is an ideal choice for protecting the motor rotor and improving the stability of the motor rotor due to the characteristics of high strength and light weight.
The prior technical proposal mainly depends on a test method to determine the model selection and the thickness of the carbon fiber. However, this approach has significant drawbacks. It is based on the test entirely, and is therefore affected by various factors such as rotor assembly sample quality, carbon fiber wrap winding uniformity, and wrap debris handling, which may affect the quality of the test sample, and determine whether it has test conditions. In addition, the selection of the type and thickness of the carbon fiber material requires multiple test iterations, which not only results in an extension of the test period, but also increases the test cost, including sample preparation cost and test bench cost.
Therefore, how to quickly select a suitable carbon fiber material in the technical implementation process of the carbon fiber-coated rotor is a problem to be solved at present.
Disclosure of Invention
The application mainly aims to provide a method, a device, equipment and a storage medium for verifying the type selection of a carbon fiber wrapped rotor, and aims to solve the technical problem of how to quickly select a proper carbon fiber material in the technical realization process of the carbon fiber wrapped rotor.
In order to achieve the above purpose, the application provides a method for verifying the type selection of a carbon fiber wrapped rotor, which comprises the following steps:
Acquiring motor rotor parameters and carbon fiber wrapping parameters;
Performing digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber encapsulation parameters to obtain a parametric encapsulation file;
calculating according to the parameterized packaging file to obtain an analysis result;
And verifying the current carbon fiber wrapped rotor type according to the analysis result.
In an embodiment, the step of digitally equivalent and parametrically encapsulating according to the motor rotor parameter and the carbon fiber encapsulation parameter to obtain a parametrized encapsulation file includes:
Obtaining a motor rotor structure and a carbon fiber wrapping structure according to the motor rotor parameters and the carbon fiber wrapping parameters;
dividing the motor rotor structure and the carbon fiber wrapping structure to obtain regional nodes;
digitally equivalent according to the regional node and parametric packaging according to the motor rotor parameter and the carbon fiber package parameter to obtain a parametric packaging file
In an embodiment, the step of performing digital equivalence according to the area node and performing parametric encapsulation by combining the motor rotor parameter and the carbon fiber package parameter to obtain a parametric encapsulation file includes:
Numbering and space coordinate conversion are carried out on the regional nodes to obtain a node set;
and carrying out parameterization packaging on the node set, the motor rotor parameters and the carbon fiber package parameters according to a preset packaging format to obtain a parameterized packaging file.
In an embodiment, the analysis result includes rotor structure stress, carbon fiber structure stress and radial deformation of the rotor structure, and the step of calculating according to the parameterized package file includes:
obtaining a regional strain equation, a regional stress equation and a whole stiffness equation according to the parameterized packaging file;
And calculating to obtain the stress of the rotor structure, the stress of the carbon fiber structure and the radial deformation of the rotor structure according to the regional strain equation, the regional stress equation and the integral stiffness equation.
In one embodiment, the step of obtaining the regional strain equation, the regional stress equation and the global stiffness equation according to the parameterized package file includes:
Establishing a node displacement function according to the parameterized packaging file, and taking the node displacement function as a region displacement function of the region;
Obtaining a first relation equation and a second relation equation according to a first preset strategy;
Obtaining a regional strain equation according to the regional displacement function and the first relation equation;
obtaining a regional stress equation according to the second relation equation and the regional strain equation;
Obtaining a regional stiffness equation according to a second preset strategy;
And carrying out integrated equivalent on the regional stiffness equation to obtain an overall stiffness equation.
In an embodiment, the step of calculating the rotor structure stress, the carbon fiber structure stress and the radial deformation of the rotor structure according to the regional strain equation, the regional stress equation and the global stiffness equation includes:
Obtaining boundary constraint conditions;
calculating to obtain a node displacement vector according to the boundary constraint condition and the integral stiffness equation;
and calculating to obtain the rotor structure stress, the carbon fiber structure stress and the radial deformation of the rotor structure according to the node displacement vector, the regional strain equation and the regional stress equation.
In an embodiment, the analysis result includes rotor structure stress, carbon fiber structure stress and radial deformation of the rotor structure, and the step of verifying the current carbon fiber wrapped rotor model according to the analysis result includes:
Acquiring the yield strength of a rotor material, the yield strength of carbon fibers and a motor air gap threshold value of the current carbon fiber wrapped rotor under the preset rotating speed requirement;
and when the rotor structure stress is smaller than the rotor material yield strength, the carbon fiber structure stress is smaller than the carbon fiber yield strength and the radial deformation of the rotor structure is smaller than the motor air gap threshold, determining that the current carbon fiber wrapped rotor selection meets the preset rotating speed requirement.
In addition, in order to achieve the above purpose, the application also provides a carbon fiber wrapped rotor model selection verification device, which comprises:
the data acquisition module is used for acquiring motor rotor parameters and carbon fiber wrapping parameters;
the data conversion module is used for carrying out digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber package parameters to obtain a parametric encapsulation file;
The data processing module is used for calculating according to the parameterized package file to obtain an analysis result;
and the type selection verification module is used for verifying the type selection of the current carbon fiber wrapped rotor according to the analysis result.
In addition, in order to achieve the aim, the application also provides a carbon fiber wrapped rotor type-selection verification device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program is configured to realize the steps of the carbon fiber wrapped rotor type-selection verification method.
In addition, in order to achieve the above object, the present application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, the computer program implementing the steps of the carbon fiber wrapped rotor pattern verification method as described above when being executed by a processor.
Furthermore, to achieve the above object, the present application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the carbon fiber wrapped rotor pattern verification method as described above.
The application provides a carbon fiber wrapped rotor model selection verification method which comprises the steps of obtaining motor rotor parameters and carbon fiber wrapped parameters, carrying out digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber wrapped parameters to obtain parameterized encapsulation files, calculating according to the parameterized encapsulation files to obtain analysis results, and verifying the current carbon fiber wrapped rotor model selection according to the analysis results. In summary, the application solves the problem of how to quickly select proper carbon fiber materials in the technical realization process of the carbon fiber wrapped rotor through the steps of parameterization encapsulation, numerical calculation, iterative verification and shape selection, and the like, shortens the development period and improves the development efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic flow chart of a first embodiment of a method for verifying a type selection of a carbon fiber wrapped rotor according to the present application;
FIG. 2 is a schematic flow chart of a second embodiment of a method for verifying a type of a carbon fiber wrapped rotor according to the present application;
FIG. 3 is a schematic flow chart of a third embodiment of a method for verifying a type of a carbon fiber wrapped rotor according to the present application;
Fig. 4 is a schematic block diagram of a carbon fiber wrapped rotor type-selection verification device according to an embodiment of the present application;
Fig. 5 is a schematic diagram of an apparatus structure of a hardware operating environment related to a method for verifying a type selection of a carbon fiber wrapped rotor in an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the technical solution of the present application and are not intended to limit the present application.
For a better understanding of the technical solution of the present application, the following detailed description will be given with reference to the drawings and the specific embodiments.
The main solution of the embodiment of the application is that parameters of a motor rotor and parameters of carbon fiber wrapping are obtained, digital equivalent and parameterized packaging are carried out according to the parameters of the motor rotor and the parameters of the carbon fiber wrapping to obtain parameterized packaging files, analysis results are obtained according to calculation of the parameterized packaging files, and verification is carried out on the current carbon fiber wrapping rotor type selection according to the analysis results.
In the current automobile market, the iteration speed of motor technology is increasingly accelerated, and large automobile host factories and suppliers at home and abroad provide high-speed motor products so as to meet the requirements of future vehicle type development. Among these demands, motors are gradually moving toward high rotational speeds, high power, high efficiency, and high power density. As a core component of the electric drive assembly, the reliability of the motor rotor faces more stringent challenges with a substantial increase in rotational speed. In order to improve the reliability of the motor rotor, the vehicle electric drive system gradually adopts an innovative structural form of a carbon fiber protective sleeve. The carbon fiber material is an ideal choice for protecting the motor rotor and improving the stability of the motor rotor due to the characteristics of high strength and light weight.
The prior technical proposal mainly depends on a test method to determine the model selection and the thickness of the carbon fiber. However, this approach has significant drawbacks. It is based on the test entirely, and is therefore affected by various factors such as rotor assembly sample quality, carbon fiber wrap winding uniformity, and wrap debris handling, which may affect the quality of the test sample, and determine whether it has test conditions. In addition, the selection of the type and thickness of the carbon fiber material requires multiple test iterations, which not only results in an extension of the test period, but also increases the test cost, including sample preparation cost and test bench cost. Therefore, how to quickly select a suitable carbon fiber material in the technical implementation process of the carbon fiber-coated rotor is a problem to be solved at present.
The method solves the problem of how to quickly select proper carbon fiber materials in the technical realization process of the carbon fiber wrapped rotor through the steps of parameterization encapsulation, numerical calculation, iterative verification and the like, shortens the development period and improves the development efficiency.
It should be noted that, the execution body of the embodiment may be a carbon fiber wrapped rotor type verification system, or may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, or an electronic device capable of implementing the carbon fiber wrapped rotor type verification function, which is not particularly limited in this embodiment. The present embodiment and the following embodiments will be described below with reference to a carbon fiber wrapped rotor type verification system.
Based on this, an embodiment of the present application provides a method for verifying a type selection of a carbon fiber wrapped rotor, and referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of the method for verifying a type selection of a carbon fiber wrapped rotor according to the present application.
In this embodiment, the carbon fiber wrapped rotor model selection verification method includes steps S10 to S40:
and S10, acquiring motor rotor parameters and carbon fiber wrapping parameters.
It should be noted that in this step, the system first obtains the currently tested motor rotor parameters and the carbon fiber wrapping parameters. The parameters of the motor rotor include, but are not limited to, the geometric dimensions of the rotor (e.g., diameter, length, shaft hole size, etc.), material properties (e.g., density, elastic modulus, poisson's ratio, etc.), while the parameters of the carbon fiber wrapping mainly include the material properties of the carbon fibers of the current test options (e.g., density, elastic modulus, poisson's ratio, etc.), and the carbon fiber thickness.
And step S20, carrying out digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber encapsulation parameters to obtain a parametric encapsulation file.
It should be noted that, digital equivalent refers to converting geometric features of a motor rotor and a carbon fiber package into a set of a series of space points, and inputting material parameters (density, elastic modulus, poisson ratio) as constant values. Parameterized packaging refers to combining these parameters in a format recognizable by the computing server to form a complete parameterized packaging file. It can be understood that the system can simplify complex motor rotor and carbon fiber wrapping structure into a series of nodes and connection relations through digital equivalent and parameterized encapsulation, thereby facilitating subsequent numerical calculation and analysis.
And step S30, calculating according to the parameterized package file to obtain an analysis result.
In this step, the analysis result obtained by calculation from the parameterized package file is performed by finite element analysis software. Specifically, the system will obtain the analysis type and boundary conditions (e.g., rotor speed, constraints, etc.) set at the time of testing. Then, the system automatically establishes a system equation according to data and boundary conditions in the parameterized packaging file and solves the system equation to obtain analysis results of stress distribution and structural deformation of the motor rotor and the carbon fiber package at the peak rotating speed.
Additionally, finite element analysis is a common numerical calculation method that can perform accurate mechanical analysis of complex structures. In the step, the digital model wrapped by the motor rotor and the carbon fiber is calculated and analyzed by finite element analysis software, so that the detailed mechanical characteristics of the motor rotor and the carbon fiber under the peak rotating speed condition can be obtained.
And step S40, verifying the current carbon fiber wrapped rotor type according to the analysis result.
In this step, the system extracts the maximum stress values of the rotor structure and the carbon fiber structure and the radial deformation of the rotor structure from the analysis result, and compares the maximum stress values of the rotor structure and the carbon fiber structure and the radial deformation of the rotor structure with preset material yield strength and radial deformation thresholds. If the verification meets the preset condition range, judging that the current carbon fiber package type meets the requirement.
Additionally, it should be noted that the preset condition range refers to a predetermined value of the mechanical characteristics (yield strength, tensile strength) of the material, which is determined in advance according to the rotor structure and the type of carbon fiber material selected by the current validation test, under certain environmental conditions (such as temperature).
In a possible implementation manner, the step S40 specifically includes:
and S401, acquiring the yield strength of a rotor material, the yield strength of the carbon fiber and a motor air gap threshold value of the current carbon fiber wrapped rotor under the preset rotating speed requirement.
It should be noted that, the yield strength of the rotor material under the preset rotation speed requirement refers to the strength value of the maximum stress that the rotor material can bear without plastic deformation under the set peak rotation speed condition of the motor rotor, and is an important parameter for evaluating whether the rotor structure is damaged under high-speed operation. The carbon fiber yield strength refers to the maximum stress value at which the carbon fiber material can maintain elastic deformation without plastic deformation when subjected to an external force, and is used to evaluate the structural strength and reliability of the carbon fiber wrapped around the rotor of the motor in this step. The motor air gap refers to the maximum amount of deformation allowed for the motor air gap, typically 20 percent of the original size of the motor air gap.
Additionally, the rotor material yield strength and the carbon fiber yield strength are inherent properties of the material, the system can be obtained from a database during material model selection, and the motor air gap threshold is an allowable range determined according to motor design requirements, so as to ensure that the rotor cannot collide with the stator during high-speed rotation.
And step S402, when the rotor structure stress is smaller than the rotor material yield strength, the carbon fiber structure stress is smaller than the carbon fiber yield strength and the radial deformation of the rotor structure is smaller than the motor air gap threshold, determining that the current carbon fiber wrapped rotor selection meets the preset rotating speed requirement.
The rotor structural stress and the carbon fiber structural stress refer to the maximum values of the rotor structural stress and the carbon fiber structural stress. Specifically, in the step, the system compares the calculated maximum stress values of the rotor structure and the carbon fiber structure and the radial deformation of the rotor structure with preset judging conditions, wherein the judging conditions comprise that the maximum stress of the rotor structure is smaller than the yield strength of the rotor material, the maximum stress of the carbon fiber structure is smaller than the yield strength B of the carbon fiber, and the radial deformation of the rotor structure is smaller than 20 percent of an air gap of the motor. If the conditions are met at the same time, the current carbon fiber package type selection can be determined to meet the requirements, otherwise, parameters (such as material types, thickness and the like) of the carbon fiber package are required to be adjusted, and digital equivalent, parametric packaging and calculation analysis are carried out again until the requirements are met.
The embodiment provides a carbon fiber wrapped rotor model selection verification method which comprises the steps of obtaining motor rotor parameters and carbon fiber wrapped parameters, carrying out digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber wrapped parameters to obtain a parametric encapsulation file, calculating according to the parametric encapsulation file to obtain an analysis result, and verifying the current carbon fiber wrapped rotor model according to the analysis result. In summary, the method solves the problem of how to quickly select proper carbon fiber materials in the technical implementation process of the carbon fiber wrapped rotor through the steps of parameterization encapsulation, numerical calculation, iterative verification and shape selection, shortens the development period and improves the development efficiency.
In the second embodiment of the present application, the same or similar content as in the first embodiment of the present application may be referred to the description above, and will not be repeated. On this basis, please refer to fig. 2, fig. 2 is a flow chart of a second embodiment of the verification method for carbon fiber wrapped rotor of the present application, wherein the step S20 specifically includes:
And step S201, obtaining a motor rotor structure and a carbon fiber wrapping structure according to the motor rotor parameters and the carbon fiber wrapping parameters.
It should be noted that, in this step, the system constructs a three-dimensional model of the motor rotor structure and the carbon fiber wrapping structure according to the provided motor rotor parameters (such as geometry, material properties, etc.) and the carbon fiber wrapping parameters (such as material properties, thickness, etc.). It will be appreciated that this step serves to transform the parameters into an intuitive three-dimensional structural model, providing the basis for subsequent analysis and computation.
Additionally, the parameters of the motor rotor and the parameters of the carbon fiber wrapping in this step refer to all parameters that can fully describe the characteristics of the motor rotor and the carbon fiber wrapping geometry, material properties, and the like. And the motor rotor structure and the carbon fiber wrapping structure refer to a simulated geometric physical model of the motor rotor and the carbon fiber wrapping.
And S202, dividing the motor rotor structure and the carbon fiber wrapping structure to obtain regional nodes.
In this step, the system divides the three-dimensional model of the constructed motor rotor structure and the carbon fiber wrapped structure to obtain a limited number of areas, and a certain number of nodes (i.e., area nodes) are set in each area. For example, the motor rotor structure and the carbon fiber wrapping structure may be divided into a number of small pieces or grids, each of which has one or more nodes disposed therein. The locations of these nodes are characterized by spatial coordinates (x, y, z) and each node has a unique number.
Additionally, the area node refers to a point representing the whole area selected from each small area obtained by dividing the motor rotor and the carbon fiber structure.
And step 203, performing digital equivalent according to the regional nodes, and performing parameterization packaging by combining the motor rotor parameters and the carbon fiber package parameters to obtain a parameterization packaging file.
It should be noted that, in this step, the system will digitally equate the area node obtained in the previous step and its related information (such as node number, space coordinates, material parameters, etc.), i.e. convert the information into a data format that can be recognized by a computer. And then, carrying out parameterization packaging according to a specific file format by combining the motor rotor parameters and the carbon fiber packaging parameters to obtain a parameterized packaging file.
It should be noted that the digital equivalent refers to a process of converting the geometric characteristics and material properties of the motor rotor and the carbon fiber wrapping structure into a data format recognizable by a computer, and the parametric package refers to organizing and packaging the data according to a specific format so as to facilitate subsequent calculation and analysis.
In a possible implementation manner, the step S203 specifically includes:
And step A10, numbering and converting the space coordinates of the regional nodes to obtain a node set.
In this step, the first step of digitizing the motor rotor and the carbon fiber wrapping is to divide the areas and determine the nodes in each area. Nodes are the fundamental elements that make up a digitized model, and they characterize position by spatial coordinates (x, y, z). Specifically, the system divides the motor rotor parameters and the carbon fiber wrapping parameters into a limited number of areas according to the motor rotor parameters and the carbon fiber wrapping parameters, and each area comprises a certain number of nodes. And sequentially numbering the nodes in each region for subsequent data processing and computation. The system then performs a spatial coordinate transformation, i.e., transforming the spatial coordinates of each node into a format recognizable by the computing server, and storing the transformed spatial coordinates to form a node set. Additionally, it should be noted that each node in the node set contains its unique number and spatial coordinate information.
And step A20, carrying out parameterization packaging on the node set, the motor rotor parameters and the carbon fiber package parameters according to a preset packaging format to obtain a parameterized packaging file.
It should be noted that the preset package format is predetermined in the system (such as inp file format), and the format file can contain all necessary parameter information and can be correctly identified and processed by the system.
Specifically, in this step, the system combines the parameters of the motor rotor (such as geometry, material properties, etc.) and the parameters of the carbon fiber wrapping (such as material properties, thickness, etc.) with the node set according to a preset packaging format to form a complete parameterized packaging file. For example, the system uses an inp file format as a preset packaging format, combines and packages information such as node sets, geometric dimensions of a motor rotor, material properties (such as density, elastic modulus, poisson ratio, etc.), material properties of carbon fiber packages, thickness, etc. according to format requirements of the inp file, and finally obtains a complete parameterized packaging file.
Additionally, it should be noted that parameters such as material parameters (such as density, elastic modulus, poisson ratio, etc.) and motor rotation speed in the parameterized packaging file can be quickly modified by a text editing software, so as to improve convenience in verification of carbon fiber wrapping type selection schemes of different carbon fiber materials and different thicknesses.
In the embodiment, the regional nodes are digitally equivalent and parameterized and packaged by combining the motor rotor parameters and the carbon fiber package parameters to obtain the parameterized package file, so that the rapid verification of carbon fiber package type selection schemes with different carbon fiber materials and different thicknesses is realized, the experiment period is shortened, and the development cost is reduced.
In the third embodiment of the present application, the same or similar contents as those of the first and second embodiments of the present application will be described with reference to the foregoing, and will not be repeated. On this basis, please refer to fig. 3, fig. 3 is a flow chart of a third embodiment of the verification method for carbon fiber wrapped rotor of the present application, wherein the step S30 specifically includes:
And step S301, obtaining a regional strain equation, a regional stress equation and a whole stiffness equation according to the parameterized packaging file.
The region refers to a cell or grid in finite element analysis, and is obtained by dividing a digitized model wrapped by a motor rotor and carbon fibers. While nodes are the connection points between the units, their locations are characterized by spatial coordinates x, y, z.
In addition, it should be noted that in this step, the system will read the parameterized package file to obtain the data information such as the node numbers, the space coordinates, the material parameters (such as density, elastic modulus, poisson ratio), the connection relationship of each partial area, the rotor rotation speed, the constraint conditions, and the like of the motor rotor and the carbon fiber package. Next, the system divides the motor rotor and the carbon fiber package into a limited number of regions according to a finite element analysis method, each region comprises a certain number of nodes, and force equations (such as a region strain equation, a region stress equation and an overall stiffness equation) are established for each region.
And step S302, calculating to obtain the stress of the rotor structure, the stress of the carbon fiber structure and the radial deformation of the rotor structure according to the regional strain equation, the regional stress equation and the integral stiffness equation.
It should be noted that, specifically, the system solves the overall stiffness equation according to the data information in the parameterized package file to obtain the node displacement component. Then, based on the relationship between the node displacement and the strain, stress (i.e., the regional strain equation and the regional stress equation), the system can calculate the strain and stress for each region. Finally, by comparing the stress values of different areas, the system can obtain the rotor structure stress and the carbon fiber structure stress. Meanwhile, according to the node displacement component, the system can also calculate the radial deformation of the rotor structure.
Additionally, the rotor structure stress and the carbon fiber structure stress herein refer to maximum stress values of the rotor structure and the carbon fiber package under the peak rotation speed condition. The radial deformation of the rotor structure refers to the radial deformation of the rotor structure under the peak rotation speed condition. It will be appreciated that these parameters are important criteria for assessing whether the carbon fiber package selection meets the requirements. If the maximum of the rotor or carbon fiber structural stresses exceeds the yield strength of the material, structural failure may result. The radial deformation of the rotor structure needs to be compared with the air gap of the motor to ensure that the deformation is in a controllable range.
In a possible implementation manner, the step S301 specifically includes:
And step B10, establishing a node displacement function according to the parameterized package file, and taking the node displacement function as a region displacement function of the region.
It should be noted that, in this step, the system establishes a node displacement function for each region based on the method of finite element analysis. The function describes the relationship between the displacement of any point within the region and the displacement of the node. Specifically, the system will approximately represent the displacement of any point in the region as a function of the node coordinates and node displacement of the region, that is, map the node displacement to any point inside the region by using a shape function matrix, so as to obtain a region displacement function of the region, as shown in formula 1:
{ d } = [ N ] { delta } e (formula 1)
Where { d } is the array of displacement components at any point in the region, [ N ] is a matrix of shape functions, its elements are the function of the position coordinates { delta } e, which is the array of displacement components at the nodes of the region.
And step B20, obtaining a first relation equation and a second relation equation according to a first preset strategy.
It should be noted that, in this step, the first preset strategy refers to basic equations and relationships in elastic mechanics. The system can obtain a first relation equation (namely a strain-displacement relation equation) and a second relation equation (namely a stress-strain relation equation) according to the relation between a strain component and a displacement component and the relation between stress and strain in elastic mechanics. Specifically, the first relation equation describes a linear relation between the strain component and the displacement component, which can be obtained by deriving a displacement function. The second relation equation describes the linear relation between the stress component and the strain component, and depends on parameters such as the elastic modulus, the shear elastic modulus, the poisson ratio and the like of the material, as shown in the formula 2 and the formula 3:
Where u, v, w refer to the displacement of the object's corresponding point in the x, y, z axis, respectively, ∈ x,εy,εz refers to the linear strain along the x, y, z axis, respectively, and γ xy,γyz,γzx refers to the shear strain between the x-axis y axis and the z axis.
Similarly, where ε x,εy,εz refers to the linear strain along the x, y, z axis, σ x,σy,σz refers to the stress component along the x, y, z axis, E refers to the elastic modulus of the material, G refers to the shear elastic modulus of the material, and μ refers to the Poisson's ratio, respectively.
And step B30, obtaining a regional strain equation according to the regional displacement function and the first relation equation.
In this step, the system derives a strain component expression of any point in the region by deriving the region displacement function. These expressions are then substituted into the stress-strain relationship equation to yield the regional strain equation expressed in terms of node displacement, as shown in equation 4:
{ ε } = [ B ] { δ } e (equation 4)
{ Ε } refers to the strain array at any point in the region, and [ B ] refers to the region strain matrix.
And step B40, obtaining a regional stress equation according to the second relation equation and the regional strain equation.
It should be noted that the second relational equation refers to a relational equation between stress and strain, i.e., hooke's law. According to hooke's law, stress is proportional to strain, and the proportionality coefficient is determined by the elastic modulus and poisson's ratio of the material. Specifically, the system calculates the strain distribution in the region according to the basic principle of elastic mechanics, and then substitutes the strain distribution into the hooke's law to calculate the stress distribution in the region by using a region strain equation, thereby obtaining a region stress equation, as shown in formula 5:
{ σ } = [ D ] [ B ] { δ } e (equation 5)
Wherein [ D ] refers to an elastic matrix determined by the elastic modulus E and Poisson's ratio mu of the material.
And step B50, obtaining a regional stiffness equation according to a second preset strategy.
It should be noted that, in this step, the second preset strategy refers to a method of deriving the regional stiffness equation using the virtual work principle. The virtual work principle is one of the basic principles in structural mechanics, and shows that the virtual work done by external force is equal to the virtual work done by internal force in the equilibrium state of the structure. Specifically, the system establishes an equality relationship between the external force virtual work and the internal force virtual work according to the basic principle of the virtual work principle. Then, the regional strain equation and the regional stress equation are substituted into the equation relation, and the regional stiffness equation is obtained by using mathematical transformation, as shown in formula 6:
{ F } e＝[k]e{δ}e (equation 6)
Where { F } e refers to the area node force component array and [ k ] e refers to the area stiffness matrix.
Additionally, [ k ] e specifically ranges as shown in equation 7:
[k] e＝∫∫∫V[B]T [ D ] [ B ] dxdydz (formula 7)
And B60, carrying out integrated equivalent on the regional stiffness equation to obtain an overall stiffness equation.
It should be noted that the integrated equivalent refers to that the stiffness equations of the respective regions are combined to form an overall stiffness equation describing the deformation characteristics of the entire structure. Specifically, in this step, the system calculates the equivalent node force according to the virtual work equivalent principle, and integrates the overall node load vector [ R ]. Then, using mathematical transformation and a simplified method, a global stiffness equation is obtained as shown in equation 8:
[K] { σ = { R } (equation 8)
Where [ K ] is the overall stiffness matrix integrated by the regional stiffness matrix, { sigma } is the overall node displacement vector, { R } is the array of all node loads.
In a possible implementation manner, the step S302 specifically includes:
And step C10, obtaining boundary constraint conditions.
It should be noted that, in this step, the acquisition of the boundary constraint condition is a basis for implementing the subsequent calculation analysis. Boundary constraints generally include displacement constraints, load conditions, temperature conditions, and the like. It can be understood that by setting reasonable boundary conditions, simulation analysis can be performed on carbon fiber wrapping type selection schemes with different carbon fiber materials and different thicknesses, so that whether the carbon fiber wrapping type selection schemes meet the peak rotating speed requirement of a motor rotor can be rapidly verified.
And step C20, calculating to obtain a node displacement vector according to the boundary constraint condition and the integral stiffness equation.
It should be noted that the integral stiffness equation is an important equation describing the mechanical properties of the structure, and includes factors such as connection relation and material properties of each node in the structure. Specifically, in the step, the system calculates a node displacement vector of the motor rotor and the carbon fiber wrapped under the peak rotating speed according to the acquired boundary constraint condition and the integral stiffness equation. The node displacement vector is an important parameter describing the deformation condition of the structure, and reflects the displacement condition of each node in the structure.
And step C30, calculating to obtain the rotor structure stress, the carbon fiber structure stress and the radial deformation of the rotor structure according to the node displacement vector, the regional strain equation and the regional stress equation.
In this step, the system further calculates the rotor structural stress, the carbon fiber structural stress and the radial deformation of the rotor structure of the motor rotor and the carbon fiber wrapped at the peak rotation speed according to the node displacement vector, the regional strain equation and the regional stress equation. For example, after the node displacement vector is obtained, the system substitutes the node displacement vector into the regional strain equation to calculate the strain condition of each region. Then, according to the relation between the strain and the stress (namely, the regional stress equation), the stress condition of each region is further calculated. Meanwhile, the radial deformation of the rotor structure can be obtained by calculating the difference value of the node displacement vectors.
In the embodiment, by establishing a corresponding mechanical equation and solving, the accurate calculation of the stress, the strain and the deformation of the motor rotor and the carbon fiber wrapping structure is realized, so that whether the carbon fiber wrapping parameter meets the peak rotating speed requirement of the motor rotor can be effectively verified, and the purpose of quick model selection is achieved.
The application also provides a carbon fiber wrapped rotor type selection verification device, referring to fig. 4, the carbon fiber wrapped rotor type selection verification device comprises:
the data acquisition module 10 is used for acquiring motor rotor parameters and carbon fiber wrapping parameters.
The data conversion module 20 is configured to perform digital equivalent and parametric encapsulation according to the motor rotor parameter and the carbon fiber wrapping parameter to obtain a parametric encapsulation file.
And the data processing module 30 is used for calculating and obtaining an analysis result according to the parameterized package file.
And the model selection verification module 40 is used for verifying the current carbon fiber wrapped rotor model according to the analysis result.
The carbon fiber wrapped rotor type selection verification device provided by the application can solve the technical problem of how to quickly select a proper carbon fiber material in the technical realization process of the carbon fiber wrapped rotor by adopting the carbon fiber wrapped rotor type selection verification method in the embodiment. Compared with the prior art, the carbon fiber wrapped rotor type-selection verification device has the same beneficial effects as the carbon fiber wrapped rotor type-selection verification method provided by the embodiment, and other technical features in the carbon fiber wrapped rotor type-selection verification device are the same as the features disclosed by the embodiment method, and are not repeated herein.
In an embodiment, the data acquisition module 10 is further configured to acquire a boundary constraint condition.
In an embodiment, the data acquisition module 10 is further configured to acquire a rotor material yield strength, a carbon fiber yield strength, and a motor air gap threshold value of the current carbon fiber wrapped rotor type under a preset rotation speed requirement.
In an embodiment, the data conversion module 20 is further configured to obtain a motor rotor structure and a carbon fiber wrapping structure according to the motor rotor parameter and the carbon fiber wrapping parameter, divide the motor rotor structure and the carbon fiber wrapping structure to obtain area nodes, and perform digital equivalent according to the area nodes and perform parametric package according to the motor rotor parameter and the carbon fiber wrapping parameter to obtain a parametric package file.
In an embodiment, the data conversion module 20 is further configured to perform serial number and space coordinate conversion on the area node to obtain a node set, and perform parameterization packaging on the node set, the motor rotor parameter and the carbon fiber package parameter according to a preset packaging format to obtain a parameterized packaging file.
In an embodiment, the data processing module 30 is further configured to obtain a regional strain equation, a regional stress equation, and an overall stiffness equation according to the parameterized package file, and calculate a rotor structural stress, a carbon fiber structural stress, and a radial deformation of the rotor structure according to the regional strain equation, the regional stress equation, and the overall stiffness equation.
In an embodiment, the data processing module 30 is further configured to establish a node displacement function according to the parameterized package file, and use the node displacement function as a regional displacement function of the region, obtain a first relationship equation and a second relationship equation according to a first preset strategy, obtain a regional strain equation according to the regional displacement function and the first relationship equation, obtain a regional stress equation according to the second relationship equation and the regional strain equation, obtain a regional stiffness equation according to a second preset strategy, and perform integrated equivalent on the regional stiffness equation to obtain an overall stiffness equation.
In an embodiment, the data processing module 30 is further configured to calculate a node displacement vector according to a boundary constraint condition and the global stiffness equation, and calculate a rotor structural stress, a carbon fiber structural stress, and a radial deformation of the rotor structure according to the node displacement vector, the regional strain equation, and the regional stress equation.
In an embodiment, the model selection verification module 40 is further configured to determine that the current carbon fiber wrapped rotor model meets a preset rotational speed requirement when the rotor structure stress is less than the rotor material yield strength, the carbon fiber structure stress is less than the carbon fiber yield strength, and the rotor structure radial deformation is less than the motor air gap threshold.
The application provides a carbon fiber wrapped rotor type-selection verification device which comprises at least one processor and a memory in communication connection with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the carbon fiber wrapped rotor type-selection verification method in the first embodiment.
Referring now to fig. 5, a schematic diagram of a carbon fiber wrapped rotor type verification apparatus suitable for use in implementing embodiments of the present application is shown. The carbon fiber wrapped rotor type-selection verification device in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal DIGITAL ASSISTANT: personal digital assistants), PADs (Portable Application Description: tablet computers), PMPs (Portable MEDIA PLAYER: portable multimedia players), vehicle-mounted terminals (e.g., car navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The carbon fiber wrapped rotor type verification device shown in fig. 5 is only one example and should not be construed as limiting the functionality and scope of use of the embodiments of the present application.
As shown in fig. 5, the carbon fiber wrapped rotor type-selection verification apparatus may include a processing device 1001 (e.g., a central processing unit, a graphic processor, etc.), which may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access Memory (RAM: random Access Memory) 1004. In the RAM1004, various programs and data required for the operation of the carbon fiber wrapped rotor type-selection verification apparatus are also stored. The processing device 1001, the ROM1002, and the RAM1004 are connected to each other by a bus 1005. An input/output (I/O) interface 1006 is also connected to the bus. In general, a system including an input device 1007 such as a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc., an output device 1008 including a Liquid crystal display (LCD: liquid CRYSTAL DISPLAY), a speaker, a vibrator, etc., a storage device 1003 including a magnetic tape, a hard disk, etc., and a communication device 1009 may be connected to the I/O interface 1006. The communication means 1009 may allow the carbon fiber wrapped rotor profiling apparatus to communicate wirelessly or by wire with other apparatuses to exchange data. While carbon fiber wrapped rotor profiling apparatus with various systems are shown in the figures, it should be understood that not all of the illustrated systems are required to be implemented or provided. More or fewer systems may alternatively be implemented or provided.
In particular, according to embodiments of the present disclosure, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. The above-described functions defined in the method of the disclosed embodiment of the application are performed when the computer program is executed by the processing device 1001.
The carbon fiber coated rotor type selection verification device provided by the application adopts the carbon fiber coated rotor type selection verification method in the embodiment, so that the technical problem of how to quickly select a proper carbon fiber material in the technical realization process of the carbon fiber coated rotor can be solved. Compared with the prior art, the beneficial effects of the carbon fiber wrapped rotor type-selection verification device provided by the application are the same as those of the carbon fiber wrapped rotor type-selection verification method provided by the embodiment, and other technical features of the carbon fiber wrapped rotor type-selection verification device are the same as those disclosed by the method of the previous embodiment, so that the description is omitted.
It is to be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
The present application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon for performing the carbon fiber wrapped rotor pattern verification method of the above-described embodiments.
The computer readable storage medium provided by the present application may be, for example, a U disk, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, or device, or a combination of any of the foregoing. More specific examples of a computer-readable storage medium may include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (RAM: random Access Memory), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (EPROM: erasable Programmable Read Only Memory or flash Memory), an optical fiber, a portable compact disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this embodiment, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, or device. Program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to electrical wiring, fiber optic cable, RF (Radio Frequency) and the like, or any suitable combination of the foregoing.
The computer readable storage medium may be included in the carbon fiber wrapped rotor type-selection verification device or may exist alone without being assembled into the carbon fiber wrapped rotor type-selection verification device.
The computer readable storage medium is loaded with one or more programs, and when the one or more programs are executed by the carbon fiber wrapped rotor type-selection verification device, the carbon fiber wrapped rotor type-selection verification device obtains motor rotor parameters and carbon fiber wrapped parameters, performs digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber wrapped parameters to obtain a parametric encapsulation file, calculates according to the parametric encapsulation file to obtain an analysis result, and verifies the current carbon fiber wrapped rotor type according to the analysis result.
Computer program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of remote computers, the remote computer may be connected to the user's computer through any kind of network, including a local area network (LAN: local Area Network) or a wide area network (WAN: wide Area Network), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The modules involved in the embodiments of the present application may be implemented in software or in hardware. Wherein the name of the module does not constitute a limitation of the unit itself in some cases.
The readable storage medium provided by the application is a computer readable storage medium, and the computer readable storage medium stores computer readable program instructions (namely computer programs) for executing the carbon fiber wrapped rotor model selection verification method, so that the technical problem of how to quickly select a proper carbon fiber material in the technical realization process of the carbon fiber wrapped rotor can be solved. Compared with the prior art, the beneficial effects of the computer readable storage medium provided by the application are the same as those of the carbon fiber wrapped rotor model selection verification method provided by the embodiment, and the description is omitted here.
The application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the carbon fiber wrapped rotor pattern selection verification method as described above.
The computer program product provided by the application can solve the technical problem of how to quickly select a proper carbon fiber material in the technical realization process of the carbon fiber-coated rotor. Compared with the prior art, the beneficial effects of the computer program product provided by the application are the same as those of the carbon fiber wrapped rotor model selection verification method provided by the embodiment, and the description is omitted here.
The foregoing description is only a partial embodiment of the present application, and is not intended to limit the scope of the present application, and all the equivalent structural changes made by the description and the accompanying drawings under the technical concept of the present application, or the direct/indirect application in other related technical fields are included in the scope of the present application.
Claims (10)
1. A method for verifying the type selection of a carbon fiber wrapped rotor, the method comprising:
Acquiring motor rotor parameters and carbon fiber wrapping parameters;
Performing digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber encapsulation parameters to obtain a parametric encapsulation file;
calculating according to the parameterized packaging file to obtain an analysis result;
And verifying the current carbon fiber wrapped rotor type according to the analysis result.
2. The method of claim 1, wherein the step of digitally equivalent and parametrically encapsulating the parameters of the motor rotor and the parameters of the carbon fiber wrap to obtain a parametrized encapsulated file comprises:
Obtaining a motor rotor structure and a carbon fiber wrapping structure according to the motor rotor parameters and the carbon fiber wrapping parameters;
dividing the motor rotor structure and the carbon fiber wrapping structure to obtain regional nodes;
And carrying out digital equivalent according to the area node, and carrying out parameterization packaging by combining the motor rotor parameter and the carbon fiber packaging parameter to obtain a parameterization packaging file.
3. The method of claim 2, wherein the step of performing digital equivalent according to the area node and performing parametric package in combination with the motor rotor parameter and the carbon fiber package parameter to obtain a parametric package file includes:
Numbering and space coordinate conversion are carried out on the regional nodes to obtain a node set;
and carrying out parameterization packaging on the node set, the motor rotor parameters and the carbon fiber package parameters according to a preset packaging format to obtain a parameterized packaging file.
4. The method of claim 1, wherein the analysis results include rotor structure stress, carbon fiber structure stress, and rotor structure radial deflection, and wherein the step of calculating from the parameterized package file includes:
obtaining a regional strain equation, a regional stress equation and a whole stiffness equation according to the parameterized packaging file;
And calculating to obtain the stress of the rotor structure, the stress of the carbon fiber structure and the radial deformation of the rotor structure according to the regional strain equation, the regional stress equation and the integral stiffness equation.
5. The method of claim 4, wherein the step of deriving the regional strain equation, the regional stress equation, and the global stiffness equation from the parameterized packaging file comprises:
Establishing a node displacement function according to the parameterized packaging file, and taking the node displacement function as a region displacement function of the region;
Obtaining a first relation equation and a second relation equation according to a first preset strategy;
Obtaining a regional strain equation according to the regional displacement function and the first relation equation;
obtaining a regional stress equation according to the second relation equation and the regional strain equation;
Obtaining a regional stiffness equation according to a second preset strategy;
And carrying out integrated equivalent on the regional stiffness equation to obtain an overall stiffness equation.
6. The method of claim 4, wherein the step of calculating rotor structural stress, carbon fiber structural stress, and rotor structural radial deflection from the regional strain equation, the regional stress equation, and the global stiffness equation comprises:
Obtaining boundary constraint conditions;
calculating to obtain a node displacement vector according to the boundary constraint condition and the integral stiffness equation;
and calculating to obtain the rotor structure stress, the carbon fiber structure stress and the radial deformation of the rotor structure according to the node displacement vector, the regional strain equation and the regional stress equation.
7. The method of claim 1, wherein the analysis results include rotor structure stress, carbon fiber structure stress, and rotor structure radial deflection, and wherein validating the current carbon fiber wrapped rotor profile based on the analysis results comprises:
Acquiring the yield strength of a rotor material, the yield strength of carbon fibers and a motor air gap threshold value of the current carbon fiber wrapped rotor under the preset rotating speed requirement;
and when the rotor structure stress is smaller than the rotor material yield strength, the carbon fiber structure stress is smaller than the carbon fiber yield strength and the radial deformation of the rotor structure is smaller than the motor air gap threshold, determining that the current carbon fiber wrapped rotor selection meets the preset rotating speed requirement.
8. A carbon fiber wrapped rotor pattern selection verification device, the device comprising:
the data acquisition module is used for acquiring motor rotor parameters and carbon fiber wrapping parameters;
the data conversion module is used for carrying out digital equivalent and parametric encapsulation according to the motor rotor parameters and the carbon fiber package parameters to obtain a parametric encapsulation file;
The data processing module is used for calculating according to the parameterized package file to obtain an analysis result;
and the type selection verification module is used for verifying the type selection of the current carbon fiber wrapped rotor according to the analysis result.
9. A carbon fibre wrapped rotor profiling apparatus characterised in that the apparatus comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the carbon fibre wrapped rotor profiling method as claimed in any one of claims 1 to 7.
10. A storage medium, characterized in that the storage medium is a computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the carbon fiber wrapped rotor pattern verification method according to any one of claims 1 to 7.
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