Handbag accessory structure simulation optimization method and system

Abstract

The invention discloses a structure simulation optimization method for handbag accessories. The method comprises the following steps: determining an optimization target and setting a load condition and a boundary condition; creating a three-dimensional geometric model of the handbag accessory; performing mesh generation on the geometric model to generate a finite element mesh model; defining the material attribute of each part of the handbag accessory; boundary conditions and loads are applied, and physical constraint and stress conditions of the handbag accessories in the actual use process are simulated; carrying out simulation calculation by using finite element analysis software to obtain deformation, stress and strain distribution of the handbag accessory under the action of a load; performing structure optimization on the handbag accessories according to a simulation calculation result; according to the structure simulation optimization method for the handbag accessories, the problems of precision, efficiency and cost in the design of the handbag accessories are solved, the intelligent level of the design process is improved, and the quality and performance of products are ensured.

Description

Technical Field

[0001] The present invention relates to a method and system for simulating and optimizing the structure of handbag accessories. Background Art

[0002] With the increasing requirements of consumers for the appearance and performance of handbag accessories, the traditional design methods of handbag accessories gradually reveal many deficiencies. The traditional design of handbag accessories usually relies on experience and manual drawing, and there is often a lack of scientific analysis and optimization means in the design process. Specifically, in the actual use process of handbag accessories, they often face challenges of large external loads, such as pulling, pressure, etc., and the research on these loads and the resulting stress and strain distributions often requires experimental verification, which is time-consuming, costly and not accurate enough.

[0003] Currently, most designs of handbag accessories are evaluated by simple static analysis and experiments. However, due to the lack of comprehensive structural optimization analysis, these designs often cannot well meet the actual use requirements, especially in terms of bearing strength, stiffness and durability, there are often deficiencies. The traditional design method is prone to neglect the reasonable utilization of materials, resulting in over-design or material waste of some components, thus increasing the production cost. In addition, repeated physical experiments and modifications in the design process not only increase the cost and time, but also reduce the design efficiency.

[0004] Regarding the strength, stiffness and durability of handbag accessories, the simulation and optimization method based on finite element analysis can significantly improve this situation. As a numerical calculation method, finite element analysis can simulate the stress conditions of handbag accessories in the actual use process, obtain more accurate stress, deformation and strain distributions, and thus provide a scientific basis for the structural optimization of handbag accessories. However, currently most designs still rely on manual experience and single static analysis, it is difficult to achieve comprehensive optimization of handbag accessories, and the reasonable utilization of materials and iterative optimization of design have not been fully emphasized.

[0005] Therefore, the prior art has the following problems in the design process of handbag accessories: 1) The design process lacks scientific and accurate simulation analysis and cannot comprehensively simulate the loads and stress conditions in use; 2) The traditional design method relies too much on physical experiments, increasing time and cost; 3) There is a lack of efficient structural optimization methods, resulting in over-design or unreasonable material waste in the design of handbag accessories; 4) The design cycle is long and it is difficult to quickly respond to market demands and changing user needs. Summary of the Invention

[0006] The object of the present invention is to provide a method and system for structural simulation and optimization of handbag accessories, which solve the problems of accuracy, efficiency and cost in the design of handbag accessories, improve the intelligent level of the design process, and ensure the quality and performance of the products.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0008] A method for structural simulation and optimization of handbag accessories includes the following steps:

[0009] Determine the optimization objective and set the load conditions and boundary conditions;

[0010] Create a three-dimensional geometric model of the handbag accessory;

[0011] Mesh the geometric model to generate a finite element mesh model;

[0012] Define the material properties of each component of the handbag accessory;

[0013] Apply the boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use;

[0014] Use finite element analysis software to perform simulation calculations to obtain the deformation, stress and strain distributions of the handbag accessory under the action of the load;

[0015] Optimize the structure of the handbag accessory according to the simulation calculation results;

[0016] Repeatedly perform simulation calculations and optimization designs until the optimization objective is achieved.

[0017] Preferably, the method for determining the optimization objective is as follows:

[0018] Conduct structural strength optimization to reduce the occurrence of maximum stress and strain, and the objective function is:

[0019] σ max <σ yield

[0020] Wherein, σmax is the maximum stress and σyield is the material yield strength;

[0021] Conduct mass minimization optimization, and the objective function is:

[0022] min m

[0023] Wherein, m is the mass of the handbag accessory;

[0024] Conduct stiffness optimization, and the objective function is:

[0025] min Δ

[0026] Among them, Δ is the maximum deformation amount.

[0027] Preferably, the method for setting the load conditions and boundary conditions is as follows:

[0028] Set an external static load, expressed as a three-dimensional load distribution:

[0029] F load ={F x , F y , F z}

[0030] Among them, Fx, Fy, and Fz are the force distributions in the X, Y, and Z directions;

[0031] The dynamic load simulates the impact force during the process of a user carrying a handbag.

[0032] Set the inertial load, which is set according to the mass and acceleration of the accessories.

[0033] Fixed constraint conditions, which limit the displacement of certain parts of the handbag accessories. The formula is:

[0034] u x = u y = u z = 0

[0035] Among them, ux, uy, and uz indicate that the displacements in the three directions are zero.

[0036] Symmetric constraint conditions, where the displacement along the normal direction is zero. The formula is:

[0037]

[0038] Slip constraint conditions, which define the friction coefficient μ and the contact force Fcontact. The formula is:

[0039] Fcontact = μ·N

[0040] Among them, N is the normal force of the contact surface.

[0041] Preferably, the method for creating a three-dimensional geometric model of the handbag accessories is as follows:

[0042] Adopt curve and surface modeling methods to define a more precise geometric shape through control points and surface equations;

[0043] Use the following formula to describe the surface and curve:

[0044]

[0045] Among them, B(t) is the point on the curve, Pi is the control point, Bi,n(t) is the B-spline basis function, n is the order of the curve, and t is the parameter.

[0046] Preferably, the method for mesh generation of the geometric model to generate a finite element mesh model is as follows:

[0047] Select the mesh element type as a three-dimensional element;

[0048] Use a mesh generation algorithm to generate a mesh model suitable for the geometry of the handbag accessory, specifically as follows:

[0049]

[0050] Store the object data in eight sub-regions according to the space division and execute recursively;

[0051] Conduct a mesh quality inspection to ensure that the shape of the mesh elements is close to a regular shape, the element sizes are consistent, and the continuity of the mesh is ensured;

[0052] Combine the material properties with the mesh elements and assign corresponding physical properties to each element.

[0053] Preferably, the method for applying boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use is as follows:

[0054] Determine the boundary conditions, including fixed support boundaries, sliding boundaries, symmetric boundaries, or free boundaries, specifically as follows:

[0055] Fixed support boundary condition:

[0056] u = 0, v = 0, w = 0; at the fixed support point, the displacement is zero;

[0057] where u, v, and w respectively represent the displacement components of the handbag accessory in the x, y, and z directions;

[0058] Sliding boundary condition:

[0059] σn = 0; on the sliding boundary, the normal stress is zero;

[0060] where σn represents the normal stress;

[0061] Symmetric boundary condition:

[0062] On the symmetric boundary, the derivative of the normal displacement is zero;

[0063] where, represents the derivative of the normal displacement;

[0064] Free boundary condition:

[0065] σt = 0; on the free boundary, the tangential stress is zero;

[0066] Among them, σt represents the tangential stress;

[0067] Apply load conditions, including external forces, pressures, temperature changes, etc., and the load conditions can be expressed by the following formula:

[0068] External force application:

[0069] F = m·a

[0070] Among them, F is the applied external force, m is the mass of the handbag accessory, and a is the applied acceleration;

[0071] Pressure loading:

[0072]

[0073] Among them, P is the applied pressure, F is the applied force, and A is the area of the force-bearing region;

[0074] Temperature change loading:

[0075] Δσ = E·α·ΔT

[0076] Among them, Δσ is the stress caused by temperature change, E is the elastic modulus of the material, α is the thermal expansion coefficient of the material, and ΔT is the temperature change;

[0077] Combine the applied boundary conditions and loads to form a complete simulation model, and solve it through finite element analysis to obtain the physical constraints and stress conditions of the handbag accessory during actual use. The formula for the solving process is:

[0078] [K]{U} = {F}

[0079] Among them, [K] is the stiffness matrix, {{U} is the displacement vector, and {F} is the load vector.

[0080] Preferably, the method for optimizing the structure of the handbag accessory according to the simulation calculation results is:

[0081] The optimization objectives include minimizing the mass of the accessory, maximizing the stiffness of the accessory, and minimizing the stress;

[0082] The constraint conditions include material strength limitation, displacement limitation, and structural size limitation;

[0083]

[0084] Among them, ρi(xi) represents the material density of the i-th element, xi is the design variable, Vi is the volume of the i-th element, and n is the number of elements in the grid;

[0085] The modification of the design variable is expressed by the following formula:

[0086]

[0087] Among them, represents the design variable of the i-th element in the (k + 1)-th iteration, α is the step factor, and Δxi is the update amount of the design variable;

[0088] Through the topology optimization algorithm, the material distribution of each part in the structure is optimized. Its goal is to minimize the mass of the structure while meeting the set stiffness requirements, and it is specifically expressed as:

[0089]

[0090] Among them, Ei is the elastic modulus of the i-th element, p is the penalty factor, and ρi is the density of the i-th element;

[0091] The iterative formula for the optimization process is:

[0092]

[0093] Among them, η is the learning rate, is the gradient of the objective function;

[0094] After each optimization iteration, finite element analysis is performed to evaluate the performance of the optimized structure, and further adjustment and optimization are carried out according to the simulation calculation results until all design requirements and constraint conditions are met.

[0095] Another technical problem to be solved by the present invention is to provide a structural simulation optimization system for handbag accessories, including:

[0096] An optimization objective setting module, which is used to determine the optimization objective of the handbag accessory and set the load conditions and boundary conditions;

[0097] A three-dimensional geometric model creation module, which is used to create a three-dimensional geometric model of the handbag accessory;

[0098] A mesh generation module, which is used to perform mesh generation on the geometric model to generate a finite element mesh model;

[0099] A material property definition module, which is used to define the material properties of each component of the handbag accessory;

[0100] A boundary condition and load application module, which is used to apply boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use;

[0101] A finite element simulation calculation module, which is used to perform simulation calculations using finite element analysis software to obtain the deformation, stress, and strain distributions of the handbag accessory under the action of the load;

[0102] A structure optimization module, configured to optimize the structure of handbag accessories according to the simulation calculation results;

[0103] An optimization iteration module, configured to repeatedly perform simulation calculations and optimization designs until the optimization goal is achieved.

[0104] Another technical problem to be solved by the present invention is to provide an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the structural simulation optimization method of the handbag accessories as described above is implemented.

[0105] Another technical problem to be solved by the present invention is to provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the structural simulation optimization method of the handbag accessories as described above is implemented.

[0106] The beneficial effects of the present invention are as follows:

[0107] Through simulation calculations and optimization designs, the strength, stiffness, and durability of handbag accessories during actual use can be effectively improved, avoiding the blindness and inefficiency in traditional design methods, and ensuring that handbag accessories can withstand various external loads during use without breakage or deformation; traditional designs of handbag accessories often require multiple physical experiments to verify the rationality and durability of the design. Through the structural simulation optimization method, the performance of handbag accessories during actual use can be simulated in a virtual environment in advance, significantly shortening the design cycle and reducing the costs of testing and improvement.

[0108] By setting load conditions and boundary conditions and using finite element analysis software for simulation calculations, this method can accurately simulate the stress conditions and deformations of handbag accessories during actual use, ensuring that the optimized design better meets actual requirements; this method supports repeated simulation calculations and optimization designs. By continuously adjusting design parameters until the optimization goal is achieved. This iterative optimization process can maximize the performance of handbag accessories and solve the problem that a single design is difficult to meet complex requirements; by defining the material properties of each component and performing structural optimization, effective utilization of materials can be achieved on the premise of ensuring strength and durability, avoiding unnecessary material waste, and reducing production costs. Description of the Drawings

[0109] Figure 1 It is a flowchart of a structural simulation optimization method for a handbag accessory of the present invention. Specific Implementation Method

[0110] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present invention will be clearer according to the following description and claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0111] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. Embodiment

[0112] Refer to Figure 1 As shown, a method for structural simulation and optimization of a handbag accessory includes the following steps:

[0113] Determine the optimization objective and set the load conditions and boundary conditions;

[0114] Create a three-dimensional geometric model of the handbag accessory;

[0115] Perform mesh division on the geometric model to generate a finite element mesh model;

[0116] Define the material properties of each component of the handbag accessory;

[0117] Apply boundary conditions and loads to simulate the physical constraints and stress conditions of the handbag accessory during actual use;

[0118] Use finite element analysis software to perform simulation calculations to obtain the deformation, stress, and strain distributions of the handbag accessory under the action of the load;

[0119] Optimize the structure of the handbag accessory according to the simulation calculation results;

[0120] Repeatedly perform simulation calculations and optimization designs until the optimization objective is achieved.

[0121] By simulating the loads and stress conditions in actual use through finite element analysis (FEA), designers can accurately predict the stress, deformation, and strain distributions that the handbag accessory may encounter in actual use. Such accurate simulation results can help discover potential design problems, avoid empirical errors in traditional design methods, and thus improve the accuracy and reliability of the design.

[0122] Through structural optimization analysis, it is possible to ensure that the various components of handbag accessories meet the strength and stiffness requirements while avoiding unnecessary material waste. The optimized design makes the use of materials more efficient, thereby reducing the consumption of raw materials in the production process and reducing production costs. In addition, over-design is avoided, which can ensure product quality and reduce unnecessary manufacturing complexity.

[0123] By using simulation optimization methods, designers can quickly perform multiple simulations and optimization iterations in a virtual environment, greatly shortening the design cycle of handbag accessories. Traditional design methods require multiple rounds of physical testing and adjustments, while simulation methods can perform multiple evaluations and adjustments in a relatively short period of time, quickly responding to market demands and customer requirements. This not only improves the market competitiveness of products, but also provides greater flexibility for rapidly changing consumer needs.

[0124] The method to determine the optimization target is:

[0125] Structural strength optimization is performed to reduce the occurrence of maximum stress and strain. The objective function is:

[0126] σ max <σ yield

[0127] Among them, σmax is the maximum stress, σyield is the yield strength of the material;

[0128] Perform quality minimization optimization, the objective function is:

[0129] min m

[0130] Among them, m is the mass of the handbag accessories;

[0131] For stiffness optimization, the objective function is:

[0132] minΔ

[0133] Among them, Δ is the maximum deformation.

[0134] By optimizing the structural strength, this solution can effectively reduce the maximum stress and strain of handbag accessories during use, and reduce the risk of damage caused by overload. By ensuring that the maximum stress (σmax) of each component in the design is lower than the yield strength (σyield) of the material, it can be ensured that the accessories will not be damaged when subjected to normal use loads, thereby improving the safety and service life of the product.

[0135] Through mass minimization optimization, the goal is to minimize the mass of the handbag accessories as much as possible while ensuring that the design meets the strength and functionality requirements. Reducing the use of materials not only reduces production costs but also makes the handbag accessories lighter during transportation and use. This optimization method reduces raw material waste by avoiding overdesign, achieving higher material utilization rates, and further optimizing production costs.

[0136] Through stiffness optimization, this solution aims to reduce the maximum deformation (Δ) of the accessories, thereby enhancing the stiffness and durability of the handbag accessories. In actual use, a lower deformation means that the accessories can better maintain their shape and structure during use, avoiding deformation or loss of function due to excessive loads. This optimization not only improves the structural performance of the accessories but also enhances the comfort and experience of consumers when using the handbag.

[0137] The method for setting load conditions and boundary conditions is as follows:

[0138] Set the external static load, expressed as a three-dimensional load distribution:

[0139] F load ={F x , F y , F z}

[0140] where Fx, Fy, and Fz are the force distributions in the X, Y, and Z directions;

[0141] The dynamic load simulates the impact force during the process of a user carrying a handbag;

[0142] Set the inertial load, which is set according to the mass and acceleration of the accessories;

[0143] Fixed constraint conditions limit the displacement of certain parts of the handbag accessories. The formula is:

[0144] u x = u y = u z = 0

[0145] where ux, uy, and uz represent that the displacements in the three directions are zero;

[0146] Symmetric constraint conditions, the displacement along the normal direction is zero. The formula is:

[0147]

[0148] Slip constraint conditions define the friction coefficient μ and the contact force Fcontact. The formula is:

[0149] Fcontact = μ · N

[0150] Among them, N is the normal force of the contact surface.

[0151] By setting external static loads, dynamic loads, and inertial loads, this solution can more realistically simulate various physical phenomena that a handbag accessory may encounter during use, including user lifting, lowering, impact, etc. In particular, dynamic loads can simulate the impact force of a handbag during handling or collision, ensuring that the design can withstand extreme situations in actual use, thereby enhancing the realism and reliability of the design.

[0152] By setting fixed constraint conditions, symmetric constraint conditions, and slip constraint conditions, precise constraints can be imposed on the key parts of the handbag accessory to simulate real physical limitations. For example, fixed constraints can ensure that the handbag does not experience unconventional displacements at certain contact points, while symmetric constraints and slip constraints help simulate the natural movement and friction effects of the handbag accessory during use. Through the precise setting of these boundary conditions, potential structural weak points can be identified in the simulation to avoid structural instability or durability problems in actual use.

[0153] By introducing slip constraints of the friction coefficient and contact force, this solution can effectively consider the friction and contact effects between the accessory and other objects (such as the arm, other bags, etc.). This helps optimize the design of the handbag accessory, making it more stable during use, reducing unnecessary friction and wear, and enhancing the comfort of use. In addition, the simulation of friction can also help designers optimize the appearance and material selection of the accessory, thereby improving the overall performance and durability of the product.

[0154] The method for creating a three-dimensional geometric model of a handbag accessory is as follows:

[0155] Adopt curve and surface modeling methods to define a more precise geometric shape through control points and surface equations;

[0156] Use the following formula to describe the surface and curve:

[0157]

[0158] Among them, B(t) is the point on the curve, Pi is the control point, Bi,n(t) is the B-spline basis function, n is the order of the curve, and t is the parameter.

[0159] By using B-spline curves and surfaces, the geometric shape of the handbag accessory can be precisely controlled. B-spline curves and surfaces are highly sensitive to control points and can achieve precise modeling of complex curve and surface shapes. This method can generate smooth designs with complex details, which is particularly suitable for the design of handbag accessories that require both aesthetics and functionality.

[0160] The shape of the model can be easily adjusted by using control points and Bezier basis functions. During the modeling process, the geometric shape of the handbag accessories can be easily modified by moving the control points or changing the curve order. This makes the design process more flexible and can quickly respond to changes in design requirements, optimize the structure or appearance of the handbag accessories, and even make detailed adjustments without completely rebuilding the model.

[0161] Curve and surface modeling methods are particularly suitable for describing complex geometric shapes, which is essential for objects such as handbag accessories that need to contain bends, curves or fine shapes. Bezier curves are widely used in many design software and can generate highly smooth and clearly structured surfaces, ensuring that handbag accessories not only have an elegant appearance, but also remain feasible during the manufacturing process.

[0162] The method of meshing the geometric model and generating a finite element mesh model is as follows:

[0163] Select the mesh element type as 3D element;

[0164] A mesh model that fits the geometry of the handbag accessories is generated using a mesh generation algorithm as follows:

[0165]

[0166] Store the object data in eight sub-areas according to the spatial division, and execute recursively;

[0167] Perform mesh quality checks to ensure that the shapes of mesh elements are close to regular shapes, the element sizes are consistent, and the continuity of the mesh is ensured;

[0168] Combine material properties with mesh elements to assign appropriate physical properties to each element.

[0169] By partitioning the space to store the object data in eight sub-areas and recursively performing mesh generation, complex geometries can be meshed more accurately. This partitioning method can flexibly adjust the density of the mesh according to the specific shape and characteristics of the object. For complex handbag accessories, the problem of insufficient calculation accuracy due to too coarse mesh can be avoided. At the same time, the mesh accuracy of local areas can be controlled by recursive subdivision, thereby improving the accuracy and calculation efficiency of finite element analysis.

[0170] It is an important step to check the mesh quality to ensure that the shapes of the mesh elements are close to regular shapes, the element sizes are consistent, and the continuity of the mesh is guaranteed. The quality of the mesh directly affects the accuracy of the finite element analysis results. If the mesh shape is irregular or discontinuous, it may cause calculation errors or unstable solutions. By checking and optimizing the mesh quality, the stability and accuracy of the numerical analysis can be ensured, and deviations in the analysis results caused by unqualified meshes can be avoided.

[0171] Combining material properties with mesh elements and assigning corresponding physical properties to each element can more accurately reflect the actual performance of handbag accessories under different loading conditions. Different materials (such as leather, metal, etc.) have different mechanical behaviors. In this way, it can ensure that each element is analyzed according to its location and material properties. This not only improves the accuracy of the simulation results, but also better optimizes the design, making the final handbag accessories more in line with actual usage conditions and improving product performance.

[0172] The method of applying boundary conditions and loads to simulate the physical constraints and forces of handbag accessories during actual use is as follows:

[0173] Determine the boundary conditions, which can include fixed support boundaries, sliding boundaries, symmetry boundaries, or free boundaries, as follows:

[0174] Fixed support boundary condition:

[0175] u=0,v=0,w=0; at the fixed support point, the displacement is zero;

[0176] Among them, u, v, and w represent the displacement components of the handbag accessories in the x, y, and z directions, respectively;

[0177] Sliding boundary conditions:

[0178] σn=0; on the sliding boundary, the normal stress is zero;

[0179] Where σn represents the normal stress;

[0180] Symmetric boundary conditions:

[0181] On a symmetric boundary, the derivative of the normal displacement is zero;

[0182] in, represents the derivative of the normal displacement;

[0183] Free boundary conditions:

[0184] σt=0; on the free boundary, the tangential stress is zero;

[0185] Where, σt represents the tangential stress;

[0186] Load application conditions, including external forces, pressures, temperature changes, etc., and the load conditions can be expressed by the following formulas:

[0187] External force application:

[0188] F = m·a

[0189] Where F is the applied external force, m is the mass of the handbag accessory, and a is the applied acceleration;

[0190] Pressure application:

[0191]

[0192] Where P is the applied pressure, F is the applied force, and A is the area of the stressed area;

[0193] Temperature change application:

[0194] Δσ = E·α·ΔT

[0195] Where Δσ is the stress caused by temperature change, E is the elastic modulus of the material, α is the thermal expansion coefficient of the material, and ΔT is the temperature change;

[0196] Combining the applied boundary conditions and loads to form a complete simulation model, and solving it through finite element analysis to obtain the physical constraints and stress conditions of the handbag accessory during actual use. The formula for the solving process is:

[0197] [K]{U} = {F}

[0198] Where [K] is the stiffness matrix, {{U} is the displacement vector, and {F} is the load vector.

[0199] By applying different types of boundary conditions (such as fixed support, sliding, symmetry, and free boundary) and different load conditions (such as external force, pressure, and temperature change) to the handbag accessory, the physical behavior of the handbag accessory during actual use can be more accurately simulated. The reasonable combination of various boundary conditions and load conditions enables the simulation process to approach the actual use environment, thus providing more reliable analysis results.

[0200] By constructing a complete simulation model and using finite element analysis to solve its physical constraints and stress conditions, more accurate physical performance can be obtained. Through the cooperation of the stiffness matrix, displacement vector, and load vector, the model can comprehensively reflect the deformation, stress distribution, etc. of the handbag accessory under various stress conditions. This accurate simulation can detect potential design defects in advance, thereby optimizing the product structure and avoiding damage or performance problems during actual use.

[0201] The model not only considers various loads such as external forces, pressures, and temperatures, but also covers physical properties such as the coefficient of thermal expansion and the elastic modulus of materials. By solving by integrating these factors, the performance of handbag accessories under different environments and usage conditions can be simulated, such as the influence of temperature changes on materials and the influence of the bearing weight on the stress of the accessories. In this way, designers can more comprehensively consider all possible usage scenarios during the design process to ensure the quality and durability of the final product.

[0202] The method for structurally optimizing handbag accessories according to the simulation calculation results is as follows:

[0203] The optimization objectives include minimizing the mass of the accessories, maximizing the stiffness of the accessories, and minimizing the stress;

[0204] The constraint conditions include material strength limitations, displacement limitations, and structural size limitations;

[0205]

[0206] Among them, ρi(xi) represents the material density of the i-th element, xi is the design variable, Vi is the volume of the i-th element, and n is the number of elements in the mesh;

[0207] The modification of the design variable is expressed by the following formula:

[0208]

[0209] Among them, represents the design variable of the i-th element in the (k + 1)-th iteration, α is the step factor, and Δxi is the update amount of the design variable;

[0210] Through the topology optimization algorithm, the material distribution of each part in the optimized structure is optimized. Its goal is to minimize the mass of the structure while meeting the set stiffness requirements, which is specifically expressed as:

[0211]

[0212] Among them, Ei is the elastic modulus of the i-th element, p is the penalty factor, and ρi is the density of the i-th element;

[0213] The iterative formula for the optimization process is:

[0214]

[0215] Among them, η is the learning rate, is the gradient of the objective function;

[0216] After each optimization iteration, finite element analysis is performed to evaluate the performance of the optimized structure, and further adjustments and optimizations are made based on the simulation calculation results until all design requirements and constraints are met.

[0217] By using the topology optimization algorithm, the mass of the handbag accessory can be minimized while meeting the stiffness requirements. During the optimization process, the algorithm adjusts the material density distribution of each element, thereby removing unnecessary materials, reducing the weight of the accessory, while ensuring the required mechanical properties and improving the efficiency of the overall structure. This not only helps to improve the performance of the product, but also reduces the material cost and the overall weight of the product, meeting the modern design requirements for lightweight.

[0218] Constraints (such as material strength limits, displacement limits, and size limits) ensure that during the optimization process, the accessory will not exceed the load-bearing capacity of the material or cause excessive deformation during actual use. The optimization method ensures the stability and durability of all components under various loading conditions by adjusting the structure, thus avoiding failures caused by unreasonable design. The structural performance is evaluated through finite element analysis to ensure that the optimized design meets the safety requirements.

[0219] This solution uses an iterative update optimization method. After each optimization, finite element analysis is performed to evaluate the optimization results, and further adjustments are made based on the calculation feedback. Each round of optimization can make more refined adjustments based on the previous results, making the design continuously approach the ideal state. The introduction of the learning rate and gradient enables each adjustment to effectively improve the design, avoiding problems such as over-adjustment or slow convergence, and finally achieving the global optimal design.

[0220] A structural simulation optimization system for a handbag accessory, comprising:

[0221] An optimization goal setting module for determining the optimization goal of the handbag accessory and setting the load conditions and boundary conditions;

[0222] A three-dimensional geometric model creation module for creating a three-dimensional geometric model of the handbag accessory;

[0223] A mesh generation module for meshing the geometric model to generate a finite element mesh model;

[0224] A material property definition module for defining the material properties of each component of the handbag accessory;

[0225] A boundary condition and load application module for applying boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use;

[0226] A finite element simulation calculation module for using finite element analysis software to perform simulation calculations to obtain the deformation, stress, and strain distributions of the handbag accessory under the action of the load.

[0227] Structural optimization module, used to optimize the structure of handbag accessories according to simulation calculation results;

[0228] The optimization iteration module is used to repeatedly perform simulation calculations and optimization designs until the optimization goal is achieved.

[0229] The system realizes the automation of the whole process from design to simulation and then to optimization by integrating modules such as optimization target setting, geometric modeling, meshing, material property definition, etc. This greatly improves the design efficiency, and each step is based on accurate calculation and simulation results, making the final design more in line with actual needs, thereby reducing design errors and uncertainties.

[0230] The structural optimization module adjusts the handbag accessories according to the finite element simulation results to ensure that the accessories meet the performance requirements of strength, stiffness, etc., while reducing weight and material waste as much as possible. This can not only improve the performance of handbag accessories, but also effectively reduce production costs and improve the market competitiveness of products.

[0231] Through the optimization iteration module, the system can perform multiple simulations and optimizations, continuously adjust and improve the design until the predetermined optimization goal is achieved. The iterative process makes the design more accurate, and can dynamically optimize and adjust when facing different load conditions and boundary conditions, ensuring that the final product can have the best performance and reliability in actual use.

[0232] This embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the structural simulation optimization method for handbag accessories as described above when executing the program.

[0233] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the structure simulation optimization method of the handbag accessories as described above is implemented.

[0234] Those of ordinary skill in the art can understand that all or part of the process of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0235] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0236] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All kinds of modifications, substitutions, or changes made to the above structure of the present invention according to the above content of the present invention, in accordance with the common general knowledge and conventional means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A structural simulation and optimization method for handbag accessories, characterized in that It includes the following steps: Determine the optimization objective and set the load conditions and boundary conditions; Create a three-dimensional geometric model of the handbag accessory; Mesh the geometric model to generate a finite element mesh model; Define the material properties of each component of the handbag accessory; Apply the boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use; Use finite element analysis software for simulation calculations to obtain the deformation, stress, and strain distributions of the handbag accessory under the action of the load; Optimize the structure of the handbag accessory according to the simulation calculation results; Repeatedly perform simulation calculations and optimization designs until the optimization objective is achieved.

2. The structural simulation optimization method of the handbag accessory according to claim 1, wherein The method for determining the optimization objective is as follows: Conduct structural strength optimization to reduce the occurrence of maximum stress and strain, and the objective function is: σ max <σ yield where, σmax is the maximum stress and σyield is the material yield strength; Conduct mass minimization optimization, and the objective function is: min m where, m is the mass of the handbag accessory; Conduct stiffness optimization, and the objective function is: min Δ where, Δ is the maximum deformation.

3. The structural simulation optimization method for handbag accessories according to claim 2, characterized in that The method for setting the load conditions and boundary conditions is as follows: Set the external static load, expressed as a three-dimensional load distribution: F load = {F x , F y , F z} where, Fx, Fy, and Fz are the force distributions in the X, Y, and Z directions; The dynamic load simulates the impact force during the user's handbag process; Set the inertial load according to the accessory mass and acceleration; Set the fixed constraint condition to limit the displacement of certain parts of the handbag accessory, and the formula is: u x = u y = u z = 0 where, ux, uy, and uz represent that the displacements in the three directions are zero; Set the symmetric constraint condition, and the displacement along the normal direction is zero, and the formula is: Set the slip constraint condition, define the friction coefficient μ and the contact force Fcontact, and the formula is: Fcontact = μ·N where, N is the normal force of the contact surface.

4. The structural simulation optimization method for handbag accessories according to claim 1, characterized in that The method for creating a three-dimensional geometric model of the handbag accessory is as follows: Adopt the curve and surface modeling method to define a more precise geometric shape through control points and surface equations; Use the following formula to describe the surface and curve: where, B(t) is the point on the curve, Pi is the control point, Bi,n(t) is the B-spline basis function, n is the order of the curve, and t is the parameter.

5. The method for optimizing the structural simulation of the handbag accessory according to claim 1, characterized in that, The method for meshing the geometric model to generate a finite element mesh model is as follows: Select the mesh element type as a three-dimensional element; Use the mesh generation algorithm to generate a mesh model suitable for the geometric shape of the handbag accessory, specifically as follows: Store the object data in eight sub-regions according to the space division and execute recursively; Conduct mesh quality inspection to ensure that the shape of the mesh elements is close to a regular shape, the element sizes are consistent, and the continuity of the mesh is ensured; Combine the material properties with the mesh elements and assign the corresponding physical properties to each element.

6. The structural simulation optimization method of the handbag accessory according to claim 1, characterized in that The method for applying the boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use is as follows: Determine the boundary conditions, including fixed support boundary, sliding boundary, symmetric boundary, or free boundary, specifically as follows: Fixed support boundary condition: u = 0, v = 0, w = 0; at the fixed support point, the displacement is zero; where, u, v, and w respectively represent the displacement components of the handbag accessory in the x, y, and z directions; Sliding boundary condition: σn = 0; on the sliding boundary, the normal stress is zero; where, σn represents the normal stress; Symmetric boundary condition: On a symmetric boundary, the derivative of the normal displacement is zero; Among them, represents the derivative of the normal displacement; Free boundary condition: σt = 0; on the free boundary, the tangential stress is zero; where, σt represents the tangential stress; Loading conditions, including external forces, pressures, temperature changes, etc., and the load conditions can be expressed by the following formulas: External force application: F = m·a where, F is the applied external force, m is the mass of the handbag accessory, and a is the applied acceleration; Pressure loading: where, P is the applied pressure, F is the applied force, and A is the area of the force-bearing region; Temperature change loading: Δσ = E·α·ΔT where, Δσ is the stress caused by temperature change, E is the elastic modulus of the material, α is the thermal expansion coefficient of the material, and ΔT is the temperature change; Combining the applied boundary conditions and loads to form a complete simulation model, and solving it through finite element analysis to obtain the physical constraints and force conditions of the handbag accessory during actual use. The formula for the solving process is: [K]{U} = {F} where, [K] is the stiffness matrix, {{U} is the displacement vector, and {F} is the load vector.

7. The structural simulation optimization method of the handbag accessory according to claim 1, wherein The method for optimizing the structure of the handbag accessory according to the simulation calculation results is: The optimization objectives include minimizing the mass of the accessory, maximizing the stiffness of the accessory, and minimizing the stress; The constraint conditions include material strength limit, displacement limit, and structural size limit; where, ρi(xi) represents the material density of the i-th element, xi is the design variable, Vi is the volume of the i-th element, and n is the number of elements in the mesh; The modification of the design variable is expressed by the following formula: wherein, represents the design variable of the i-th element in the (k + 1)-th iteration, α is the step factor, and Δxi is the update amount of the design variable; Through the topology optimization algorithm, optimize the material distribution of each part in the structure, with the goal of minimizing the mass of the structure while meeting the set stiffness requirements, specifically expressed as: where, Ei is the elastic modulus of the i-th element, p is the penalty factor, and ρi is the density of the i-th element; The iterative formula for the optimization process is: where η is the learning rate, is the gradient of the objective function; After each optimization iteration, perform finite element analysis to evaluate the performance of the optimized structure, and make further adjustments and optimizations according to the simulation calculation results until all design requirements and constraint conditions are met.

8. A structural simulation and optimization system for handbag accessories, characterized in that, Including: Optimization objective setting module, used to determine the optimization objectives of the handbag accessory and set the load conditions and boundary conditions; Three-dimensional geometric model creation module, used to create a three-dimensional geometric model of the handbag accessory; Mesh generation module, used to generate a finite element mesh model by meshing the geometric model; Material property definition module, used to define the material properties of each component of the handbag accessory; Boundary condition and load application module, used to apply boundary conditions and loads to simulate the physical constraints and force conditions of the handbag accessory during actual use; Finite element simulation calculation module, used to perform simulation calculations using finite element analysis software to obtain the deformation, stress, and strain distributions of the handbag accessory under the action of the load; Structure optimization module, used to optimize the structure of the handbag accessory according to the simulation calculation results; Optimization iteration module, used to repeatedly perform simulation calculations and optimization designs until the optimization objectives are achieved.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the structural simulation optimization method for handbag accessories as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the structural simulation optimization method for handbag accessories as described in any one of claims 1-7.

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