CN112084606B - Ball porous heel area filling structure sole and optimal design method thereof - Google Patents
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- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
- A43B13/18—Resilient soles
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- G06—COMPUTING OR CALCULATING; COUNTING
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Abstract
The invention discloses a design method of a sole with a ball porous heel area filling structure, which comprises the following steps: step S1, establishing a sole model; s2, selecting a sole heel area as a sole optimal design area, and performing porous structure modeling on the sole heel area to obtain a spherical porous structure sole model; s3, changing relevant parameters of the porous structure to obtain a plurality of spherical porous filling structure sole models; s4, constructing a plurality of three-dimensional models of foot-sole systems containing soles with different porosities; s5, setting boundaries and loading on the three-dimensional model, performing a mobile mechanical analysis, and outputting strain energy, stress and displacement of the sole; and S6, comparing the maximum strain energy, the maximum stress and the maximum displacement of soles with different spherical porous filling structures to obtain the optimal spherical porous filling heel area structure sole optimization structure. The invention also provides a sole with the spherical porous heel area filling structure.
Description
Technical Field
The invention relates to an optimal design method, in particular to an optimal design method for a sole with a ball porous heel area filling structure and an optimal design sole structure.
Background
Shoes are an important shock absorption and buffering tool for people in walking, and have a critical effect on foot shock absorption and protection. The experimental method for researching the shock absorption performance of the foot shoes has a plurality of defects, such as long experimental period, high cost and the like. Accordingly, more and more researchers have begun to utilize computer to study the shock absorbing performance of footwear using the finite element method.
Disclosure of Invention
The invention aims to solve the main technical problems of providing a method for researching the cushioning performance of the sole in the foot motion process and the optimal design of the porous filling structure sole in the heel area based on an energy method and a finite element method, which can provide theoretical guidance and reference for the manufacture and design of the sole.
In order to solve the technical problems, the invention provides an optimal design method of a sole with a ball porous heel region filling structure, which comprises the following steps:
Step S1, establishing a sole model;
s2, selecting a sole heel area as a sole optimal design area, and performing porous structure modeling on the sole heel area to obtain a spherical porous filling structure sole model;
s3, changing the radius and the spacing of the porous structure to obtain a plurality of spherical porous filling structure sole models with different porosities;
S4, constructing a foot finite element model containing bones, soft tissues and tendons in UG, and respectively assembling the foot finite element model with the ball porous filling structure sole models with different porosities to respectively obtain a plurality of foot-sole system three-dimensional models containing soles with different porosities;
s5, introducing a plurality of foot-sole system three-dimensional models containing soles with different porosities into ABAQUS, performing grid division and boundary condition setting, and performing a dynamic analysis to obtain the stress, displacement and strain energy of the soles;
And S6, comparing the data of maximum strain energy, maximum stress, maximum displacement and the like of the sole model of the spherical porous filling structure with different porosities to obtain the optimal sole optimizing structure of the spherical porous filling structure.
In a preferred embodiment: the step S2 specifically includes:
Step S21: setting a sole heel area in UG;
Step S22: selecting a sole heel area as a porous structure filling area, and establishing a sphere array porous filling model in the area to obtain a sphere porous heel area filling structure sole model; the building rule of the sphere array porous filling model is to use a sphere model with a radius r, and array the sphere model with a distance a.
In a preferred embodiment, the step S3 specifically includes:
Step S31: respectively preparing combinations of different sphere radiuses r and array pitches a;
Step S32: and (5) repeatedly executing the step 2 to obtain the sole model with the spherical porous heel area filling structure with different porosities.
In a preferred embodiment, the step S4 specifically includes:
Step S41: CT scanning data of the foot are obtained by utilizing a CT scanning technology;
Step S42: importing foot CT scan data into medical software MIMICS, and establishing a rough foot entity model through corresponding mask extraction, threshold segmentation, region growing, mask editing and 3D computing operations;
step S43: adopting polygonal processing, curved surface construction, curved surface refinement and fairing processing operation in Geomagic Studio to establish a fairing foot bone model;
Step S44: and (3) introducing the foot bone model into UG, constructing a soft tissue model in UG, and finally assembling the foot complete model and the spherical porous filling structure sole model with different porosities together to form a plurality of foot-sole system three-dimensional models containing soles with different porosities.
In a preferred embodiment, the step S5 specifically includes:
Step S51: introducing the three-dimensional models of the foot-sole system containing soles with different porosities, which are described in the step S4, into ABAQUS, and performing material attribute giving, meshing and contact setting in the ABAQUS;
step S52: setting boundary conditions and load application of a system model, simulating a foot movement process, and performing a biomechanical analysis;
step S53: after analysis is completed, strain energy, stress and displacement data of the sole are obtained.
In a preferred embodiment, the step S6 specifically includes:
Step S61: obtaining maximum strain energy, maximum stress and maximum displacement data of each sole model;
Step S62: and respectively comparing the maximum strain energy, the maximum stress and the maximum displacement of the sole model of the spherical porous filling structure with different porosities to obtain the optimal sole optimizing structure of the spherical porous filling structure.
The invention also provides a sole with a ball porous heel region filling structure, which is characterized by comprising the following components: a sole body; the sole body is filled with hollow spheres arranged in an array in the heel area of the sole.
In a preferred embodiment, the spheres have a radius of 4.5mm, an array pitch of 7mm and a porosity of 1.02%.
Compared with the prior art, the invention has the following beneficial effects:
1) The porous filling structure sole optimization model of the heel area of the sphere porous filling structure type is provided, and the porous filling structure sole optimization model with different porosities and spatial distribution is obtained by changing the related parameters of the porous structure;
2) Numerical simulation is carried out on the foot motion process by a finite element analysis method, and the maximum strain energy, the maximum stress and the maximum displacement data of the porous filling structure sole optimization model in the process are obtained.
3) And comparing the maximum strain energy, the maximum stress and the maximum displacement of the spherical porous filling structure sole optimization model with different porosities and spatial distributions to obtain the optimal spherical porous filling structure sole optimization structure.
4) The sole analysis performed by the method can provide guiding significance for the design and production of soles.
Drawings
FIG. 1 is a schematic flow chart of main steps of a method in a preferred embodiment of the invention;
FIG. 2 is a diagram of an optimized model of a sole with an optimized porous filling structure in accordance with a preferred embodiment of the present invention;
FIG. 3 is a three-dimensional model of the foot-sole system in accordance with the preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "engaged/connected," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, may be a detachable connection, or may be an integral connection, may be a mechanical connection, may be an electrical connection, may be a direct connection, may be an indirect connection via an intermediary, may be a communication between two elements, and for one of ordinary skill in the art, the specific meaning of the terms in this disclosure may be understood in a specific case.
Referring to fig. 1, a method for optimally designing a sole with a ball porous heel region filling structure comprises the following steps:
Step S1, establishing a sole model;
Step S2, selecting a sole heel area as a sole optimal design area, and performing porous structure modeling in the sole heel area to obtain a spherical porous filling structure sole model, wherein the method specifically comprises the following steps of:
Step S21: setting a sole heel area in UG;
step S22: establishing a heel area sphere array filling model, wherein the rule of the filling model is that a sphere model with the radius r is used for carrying out array at a distance a;
step S23: the ball-and-heel-area ball-and-ball-array filling model is subjected to a boolean subtraction operation with the heel area of the sole to obtain a ball-and-multi-hole heel-area filling structure sole model, as shown in fig. 2.
Step S3, changing relevant parameters of the porous structure to obtain a plurality of spherical porous filling structure sole models with different porosities, wherein the method specifically comprises the following steps:
Step S31: respectively preparing combinations of different sphere radiuses r and array pitches a;
step S32: and (3) repeatedly executing the step S2 to obtain the spherical porous filling structure sole model with different porosities.
Step S4: constructing a foot finite element model containing bones, soft tissues and tendons in UG, and assembling the foot finite element model with a spherical porous filling structure sole model with different porosities to obtain a plurality of foot-sole system three-dimensional models containing soles with different porosities respectively, wherein the three-dimensional models are shown in figure 3 and specifically comprise:
Step S41: CT scanning data of the foot are obtained by utilizing a CT scanning technology;
specifically, CT scan data in the present invention were taken from a volunteer, male, weighing 58kg;
Step S42: importing foot CT scan data into medical software MIMICS, and establishing a rough foot bone solid model through corresponding mask extraction, threshold segmentation, region growing, mask editing and 3D computing operations;
step S43: adopting polygonal processing, curved surface construction, curved surface refinement and fairing processing operation in Geomagic Studio to establish a fairing foot bone model;
Step S44: and (3) introducing the foot bone model into UG, constructing a soft tissue model in UG, and finally assembling calcaneus, soft tissues and the porous filling structure sole optimization model together to form a plurality of foot-sole system three-dimensional models containing soles with different porosities.
Step S5: introducing a plurality of foot-sole system three-dimensional models containing soles with different porosities into ABAQUS, performing grid division and boundary condition setting, and performing a dynamic analysis to obtain the stress, displacement and strain energy of the soles; the method specifically comprises the following steps:
Step S51: introducing the three-dimensional models of the foot-sole system containing soles with different porosities, which are described in the step S4, into ABAQUS, and performing material attribute giving, meshing and contact setting in the ABAQUS;
Specifically, the calcaneus bone density is set to 1500kg/m 3, the elastic modulus is set to 7300MPa, and the Poisson's ratio is set to 0.3; the soft tissue density was set at 937kg/m 3, the elastic modulus was set at 0.45MPa, and the Poisson's ratio was set at 0.48; the sole density was set at 1230kg/m 3, the modulus of elasticity was set at 4MPa, and the Poisson's ratio was set at 0.4.
Step S52: setting boundary conditions and load application of a system model, simulating a foot movement process, and performing a biomechanical analysis;
specifically, the sole has only three degrees of freedom constraints for the bottom surface, namely: x=0, y=0, z=0, the upper end surface of the sole is set to be in surface-to-surface contact with the soft tissue, and the friction coefficient is 0.6; and setting boundary conditions consistent with actual conditions, and completing the dynamic simulation analysis of the finite element model of the sole foot. Finite element model of foot
Step S53: and after analysis is completed, extracting strain energy, stress and displacement data of the sole.
Step S6: comparing the data of maximum strain energy, maximum stress, maximum displacement and the like of the spherical porous filling structure sole models with different porosities to obtain an optimal spherical porous filling structure sole optimization structure, which specifically comprises the following steps:
Step S61: obtaining maximum strain energy, maximum stress and maximum displacement data of each sole model;
Step S62: and comparing the maximum strain energy, the maximum stress and the maximum displacement of the spherical porous filling structure sole models with different porosities respectively to obtain the optimal spherical porous filling structure sole optimization structure, namely the spherical porous filling structure sole with the porosity of 1.02 percent when the radius of the spherical is 4.5mm and the array spacing is 7mm, as shown in figure 2.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (6)
1. The utility model provides a spheroid porous heel district fills structure sole optimal design method which characterized in that includes:
Step S1, establishing a sole model;
s2, selecting a sole heel area as a sole optimal design area, and performing porous structure modeling on the sole heel area to obtain a spherical porous filling structure sole model;
s3, changing the radius and the spacing of the porous structure to obtain a plurality of spherical porous filling structure sole models with different porosities;
S4, constructing a foot finite element model containing bones, soft tissues and tendons in UG, and respectively assembling the foot finite element model with the ball porous filling structure sole models with different porosities to respectively obtain a plurality of foot-sole system three-dimensional models containing soles with different porosities;
s5, introducing a plurality of foot-sole system three-dimensional models containing soles with different porosities into ABAQUS, performing grid division and boundary condition setting, and performing a dynamic analysis to obtain the stress, displacement and strain energy of the soles;
and S6, comparing the maximum strain energy, the maximum stress and the maximum displacement data of the sole model of the spherical porous filling structure with different porosities to obtain the optimal sole optimizing structure of the spherical porous filling structure.
2. The method for optimally designing a sole with a ball porous heel area filling structure according to claim 1, wherein the step S2 specifically comprises:
Step S21: setting a sole heel area in UG;
Step S22: selecting a sole heel area as a porous structure filling area, and establishing a sphere array porous filling model in the area to obtain a sphere porous heel area filling structure sole model; the building rule of the sphere array porous filling model is to use a sphere model with a radius r, and array the sphere model with a distance a.
3. The method for optimally designing a sole with a ball porous heel area filling structure according to claim 1, wherein the step S3 specifically comprises:
Step S31: respectively preparing combinations of different sphere radiuses r and array pitches a;
Step S32: and (5) repeatedly executing the step 2 to obtain the sole model with the spherical porous heel area filling structure with different porosities.
4. The method for optimally designing a sole with a ball porous heel area filling structure according to claim 1, wherein the step S4 specifically comprises:
Step S41: CT scanning data of the foot are obtained by utilizing a CT scanning technology;
step S42: importing foot CT scan data into medical software MIMICS, and establishing a rough foot entity model through corresponding mask extraction, threshold segmentation, region growing, mask editing and 3D computing operations;
step S43: adopting polygonal processing, curved surface construction, curved surface refinement and fairing processing operation in Geomagic Studio to establish a fairing foot bone model;
Step S44: and (3) introducing the foot bone model into UG, constructing a soft tissue model in UG, and finally assembling the foot complete model and the spherical porous filling structure sole model with different porosities together to form a plurality of foot-sole system three-dimensional models containing soles with different porosities.
5. The method for optimally designing a sole with a ball porous heel area filling structure according to claim 1, wherein the step S5 specifically comprises:
Step S51: introducing the three-dimensional models of the foot-sole system containing soles with different porosities, which are described in the step S4, into ABAQUS, and performing material attribute giving, meshing and contact setting in the ABAQUS;
step S52: setting boundary conditions and load application of a system model, simulating a foot movement process, and performing a biomechanical analysis;
step S53: after analysis is completed, strain energy, stress and displacement data of the sole are obtained.
6. The method for optimally designing a sole with a ball porous heel area filling structure according to claim 1, wherein the step S6 specifically comprises:
Step S61: obtaining maximum strain energy, maximum stress and maximum displacement data of each sole model;
step S62: and respectively comparing the maximum strain energy, the maximum stress and the maximum displacement of the sole model of the ball porous heel area filling structure with different porosities to obtain the optimal ball porous filling structure sole optimization structure.
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| CN113836771B (en) * | 2021-09-28 | 2023-05-26 | 华侨大学 | Multi-cell structure sole vibration energy transmission evaluation method |
| CN114330040B (en) * | 2021-09-28 | 2024-07-26 | 华侨大学 | Sole vibration transfer characteristic analysis method |
| CN113657008B (en) * | 2021-09-28 | 2025-02-07 | 华侨大学 | An optimization design method for vibration reduction structure in the heel area of the sole based on mechanical admittance |
| CN114722679A (en) * | 2022-04-28 | 2022-07-08 | 华侨大学 | An optimization method for the toe of a pointe shoe based on a multicellular structure |
| CN119885310B (en) * | 2025-03-27 | 2025-07-25 | 禧玛诺(连云港)实业有限公司 | Intelligent design method and system for outsole of fishing shoes |
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| JP2007167568A (en) * | 2005-12-26 | 2007-07-05 | Bridgestone Sports Co Ltd | Iron sole shape design method and system therefor |
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| CN109094029A (en) * | 2018-07-12 | 2018-12-28 | 南京师范大学 | A kind of 3 D-printing biologic medical insole and Method of printing |
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