Dot matrix entity mixed structure and design method thereof
By performing topology optimization and lattice hybrid coupling on solid and cubic structures to form a hybrid lattice, the problems of insufficient stiffness, lightweighting and energy absorption efficiency in traditional hybrid structure design are solved, and the synergistic optimization of structural performance and uniform stress distribution are achieved.
Patent Information
- Application Number
- CN202511301273.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2026-02-06
AI Technical Summary
In traditional engineering structural design, solid structures are heavy and have low energy absorption efficiency, while lattice structures are lightweight but are prone to premature failure due to local stress concentration. Existing hybrid structure designs lack cross-scale synergistic enhancement mechanisms, making it difficult to balance stiffness, lightweight and energy absorption efficiency.
By constructing solid and cubic structural models, topology optimization is performed to generate TOPO lattices, which are then geometrically coupled with BCC or FCC regular lattices to form hybrid lattices. These hybrid lattices are embedded in low-density regions of the solid structure. Load-displacement response and stress distribution are analyzed using an explicit dynamic platform, and the lattice layout is iteratively adjusted to optimize structural performance.
It significantly improves the load-bearing capacity, energy absorption efficiency, and stress distribution uniformity of the structure, provides a systematic design and verification process, and provides a reliable basis for lightweight and crash-resistant engineering design.
Smart Images
Figure CN121479870A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of structural design and mechanical performance analysis technology, and more specifically, relates to a lattice solid hybrid structure and its design method. Background Technology
[0002] In traditional engineering structural design, solid structures, while possessing high stiffness, are heavy and have low energy absorption efficiency; while lattice structures (such as BCC and FCC) offer significant lightweight advantages, they are prone to premature failure due to localized stress concentration. Existing technologies often employ simple layered or infill designs for hybrid structures, lacking cross-scale synergistic reinforcement mechanisms and struggling to balance stiffness, lightweight, and energy absorption efficiency. Furthermore, current crashworthiness analysis methods largely rely on single experiments or simplified simulations, failing to systematically quantify the failure modes and multi-objective performance indicators of composite structures. Therefore, a novel hybrid structure design method and its performance verification system are urgently needed to overcome these technical bottlenecks. Summary of the Invention
[0003] To address the shortcomings of existing technologies, the purpose of this application is to provide a lattice solid hybrid structure and its design method, which can achieve synergistic optimization of structural load-bearing capacity, bending stiffness and energy absorption efficiency, and establishes a systematic simulation verification process to provide efficient design basis for engineering applications.
[0004] To achieve the above objectives, in a first aspect, this application provides a method for designing a lattice solid hybrid structure, applicable to engineering structural design, comprising the following steps: S10, construct solid structure and cube structure models, perform topology optimization on the solid structure to obtain the optimized solid structure, and perform topology optimization on the cube structure to obtain the TOPO lattice; S20, the TOPO lattice is geometrically coupled with the BCC or FCC regular lattice to form a TOPO-BCC or TOPO-FCC hybrid lattice, and then normalized. S30, the normalized hybrid lattice is embedded into the region where the density design variable is 0 in the optimized solid structure to construct a lattice solid hybrid structure; S40 establishes a finite element model based on an explicit dynamic platform, applies three-point bending boundary conditions, analyzes the load-displacement response and stress distribution of the lattice solid hybrid structure, and then adjusts the layout and parameters of the hybrid lattice and the shape of the solid structure according to the analysis results to achieve synergistic optimization of structural load-bearing capacity, bending stiffness and energy absorption efficiency.
[0005] As a further preferred embodiment, in step S10, the solid structure includes an upper panel, a lower panel, and an intermediate layer, wherein the intermediate layer is a topology optimization region.
[0006] As a further preferred option, in step S10, the topology of the solid structure is optimized using the variable density method to obtain the optimized solid structure, and the topology of the cubic structure is optimized using the level set method to obtain the TOPO lattice.
[0007] As a further preferred embodiment, the variable density method employs a solid isotropic material penalty model, with the density design variable taking values of 0 or 1, and the optimization objective being to minimize structural flexibility.
[0008] As a further preferred embodiment, in step S20, geometric coupling includes setting the diameter of the rods of each unit structure in the lattice structure through parametric modeling, and forming the required lattice structure through array replication.
[0009] As a further preferred option, in step S30, the regions in the optimized solid structure where the density design variable is 0 are determined based on the SIMP algorithm, with volume fraction as the constraint condition.
[0010] As a further preferred option, in step S40, the three-point bending boundary conditions include: setting rigid body indenter and support constraints, simulating three-point bending conditions, and defining interface interactions through the contact friction coefficient.
[0011] As a further preferred option, in step S40, the finite element model established based on the explicit dynamics platform uses tetrahedral meshes to divide the lattice structure part and hexahedral meshes to divide the optimized solid structure part. As a further preferred embodiment, step S40, which involves adjusting the layout and parameters of the hybrid lattice and the shape of the solid structure based on the analysis results, specifically includes: Analyze the stress distribution of the lattice solid hybrid structure under different displacement conditions to determine the stress concentration region; For stress concentration regions, adjust the layout of the hybrid lattice or the parameters of the bars to optimize the shape of the solid structure; The adjusted structure was re-analyzed using finite element analysis to verify the adjustment effect until the expected synergistic optimization goal was achieved.
[0012] Secondly, this application provides a lattice solid hybrid structure, designed by any one of the above-mentioned lattice solid hybrid structure design methods, including an optimized solid structure and a TOPO-BCC or TOPO-FCC hybrid lattice embedded therein.
[0013] The lattice-solid hybrid structure and its design method provided in this application utilize cross-scale coupling topology optimization of a solid framework and a hybrid lattice. During the structural design process, topology optimization is first performed on both the solid and cubic structures to generate optimized solid structures and TOPO lattices. Then, the TOPO lattice is geometrically coupled with BCC or FCC regular lattices to form a hybrid lattice, and normalization is used to ensure continuous interface load transfer. Subsequently, the hybrid lattice is embedded into low-density regions with zero density in the optimized solid structure to construct a lattice-solid hybrid reinforcement system. Finally, based on an explicit dynamic simulation platform, three-point bending boundary conditions are applied, and the load-displacement response and stress distribution are systematically analyzed, with iterative adjustments to the lattice layout and solid configuration based on this analysis. This method overcomes the limitations of traditional simple layered or infill designs for hybrid structures. Through the synergistic effect of topology optimization and lattice hybridization, it can significantly improve the load-bearing capacity, energy absorption efficiency, and stress distribution uniformity of the structure, and establishes a systematic process from design to verification, providing a reliable basis for lightweight and crash-resistant engineering design. Attached Figure Description
[0014] Figure 1 This is a flowchart of the lattice solid hybrid structure design method provided in this application; Figure 2 This is an initial model diagram of a three-point bending beam provided in an embodiment of this application; a represents the boundary conditions; b represents the model dimensions; Figure 3 This is the three-point bending beam topology provided in the embodiments of this application; a is the topology optimization result of the design area; b is the combination of the topology optimization result and the upper and lower panels; Figure 4 These are the five lattice unit structures constructed according to the embodiments of this application; Figure 5 This is the BCC entity hybrid structure provided in the embodiments of this application; Figure 6 This is the FCC entity hybrid structure provided in the embodiments of this application; Figure 7 This is the TOPO entity hybrid structure provided in the embodiments of this application; Figure 8 This is the TOPO-BCC solid hybrid structure provided in the embodiments of this application; Figure 9 This is the TOPO-FCC entity hybrid structure provided in the embodiments of this application; Figure 10 This is a comparison diagram of displacement-load curves for five lattice solid hybrid structures provided in the embodiments of this application; Figure 11 This is a comparison diagram of the peak load and average load of five lattice solid hybrid structures provided in the embodiments of this application; Figure 12This is a comparison chart of the specific energy absorption of five lattice solid hybrid structures provided in the embodiments of this application. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0016] It should be understood that, in the description of this application, the terms "first" and "second," etc., are used to distinguish different objects, rather than to describe a specific order of objects.
[0017] like Figure 1 As shown, this application provides a method for designing a lattice solid hybrid structure, which is applied in engineering structural design, including steps S10 to S40, detailed below: Step S10: Construct solid structure and cube structure models, perform topology optimization on the solid structure to obtain the optimized solid structure, and perform topology optimization on the cube structure to obtain the TOPO lattice.
[0018] In step S10, the solid structure includes a top panel, a bottom panel, and an intermediate layer, wherein the intermediate layer is a topology-optimized region. The cubic structure adopts a cubic structure with through holes.
[0019] Furthermore, the level set method can be used to perform topology optimization on the cubic structure to obtain the TOPO lattice; the variable density method can be used to perform topology optimization on the solid structure to obtain the optimized solid structure.
[0020] Specifically, the variable density method employs a solid isotropic material penalty model, with the density design variable taking values of 0 or 1, and the optimization objective being to minimize structural flexibility.
[0021] Step S20: Geometrically couple the TOPO lattice with the BCC or FCC regular lattice. Specifically, the irregular topology of the TOPO lattice complements the periodic structure of the BCC or FCC lattice to optimize the load transfer path and form a cooperative load-bearing system, i.e., form a TOPO-BCC or TOPO-FCC hybrid lattice. Then, normalize it to ensure the continuity of load transfer at the connection.
[0022] In step S20, geometric coupling may include setting the diameter of the rods of each unit structure in the lattice structure through parametric modeling, and forming the required lattice structure by array replication. Step S30: The normalized hybrid lattice is embedded into the low-density region of the optimized solid structure, that is, the region where the density design variable is 0, to construct a lattice solid hybrid structure.
[0023] In step S30, the region in the beam structure where the density design variable is 0 can be determined based on the SIMP algorithm, using the volume fraction as a constraint, to determine the region where the lattice needs to be embedded.
[0024] Step S40: Establish a finite element model based on the explicit dynamics platform, apply three-point bending boundary conditions, analyze the load-displacement response and stress distribution of the lattice solid hybrid structure, and then adjust the layout and parameters of the hybrid lattice and the shape of the solid structure according to the analysis results to achieve synergistic optimization of structural load-bearing capacity, bending stiffness and energy absorption efficiency.
[0025] In step S40, the three-point bending boundary conditions may include: setting rigid body indenters and support constraints, simulating three-point bending conditions, and defining interface interactions through the contact friction coefficient. The finite element model established based on the explicit dynamics platform can use tetrahedral meshes to divide the lattice structure part and hexahedral meshes to divide the optimized solid structure part.
[0026] Specifically, in step S40, the step of adjusting the layout and parameters of the hybrid lattice and the shape of the solid structure based on the analysis results can be as follows: analyze the stress distribution of the lattice solid hybrid structure under different displacement conditions and determine the stress concentration region; for the stress concentration region, adjust the layout of the hybrid lattice or the parameters of the rods to optimize the shape of the solid structure; re-perform finite element analysis on the adjusted structure to verify the adjustment effect until the expected synergistic optimization goal is achieved.
[0027] It should be noted that load-bearing capacity refers to peak load and average load, bending stiffness in load-displacement response refers to the slope, and energy absorption efficiency refers to energy absorption efficiency divided by mass (energy absorption is the area under the load-displacement response).
[0028] Based on the same inventive concept, this application also provides a lattice solid hybrid structure, characterized in that it is designed by the above-mentioned lattice solid hybrid structure design method, including an optimized solid structure and a TOPO-BCC or TOPO-FCC hybrid lattice embedded therein.
[0029] The lattice-solid hybrid structure and its design method provided in this application utilize cross-scale coupling topology optimization of a solid framework and a hybrid lattice. During the structural design process, topology optimization is first performed on both the solid and cubic structures to generate optimized solid structures and TOPO lattices. Then, the TOPO lattice is geometrically coupled with BCC or FCC regular lattices to form a hybrid lattice, and normalization is used to ensure continuous interface load transfer. Subsequently, the hybrid lattice is embedded into low-density regions with zero density in the optimized solid structure to construct a lattice-solid hybrid reinforcement system. Finally, based on an explicit dynamic simulation platform, three-point bending boundary conditions are applied, and the load-displacement response and stress distribution are systematically analyzed, with iterative adjustments to the lattice layout and solid configuration based on this analysis. This method overcomes the limitations of traditional simple layered or infill designs for hybrid structures. Through the synergistic effect of topology optimization and lattice hybridization, it can significantly improve the load-bearing capacity, energy absorption efficiency, and stress distribution uniformity of the structure, and establishes a systematic process from design to verification, providing a reliable basis for lightweight and crash-resistant engineering design.
[0030] In one embodiment, the technical solution to achieve the above objective can be as follows: This embodiment provides a lattice solid hybrid structure and its design method, and the specific implementation steps are as follows: S1 involves the planning and design of hybrid structures combining BCC, FCC, TOPO, TOPO-BCC, and TOPO-FCC lattices with solids. The diameter of the members in each lattice structure is uniformly set to 0.5mm for ease of comparative study.
[0031] S2 selects the beam structure after three-point bending topology optimization as the solid part, and uses its high stiffness characteristics to build the main load-bearing frame to provide stable support for the overall structure.
[0032] For clarity, S3 is named BCC entity hybrid structure, FCC entity hybrid structure, TOPO entity hybrid structure, TOPO-BCC entity hybrid structure and TOPO-FCC entity hybrid structure respectively.
[0033] S4 focuses on exploring optimization paths for composite systems in terms of impact resistance, energy absorption efficiency, and failure mode control, providing a clear direction for subsequent design.
[0034] S5 precisely embeds different types of lattice structures into the deleted regions of the optimized solid structure, i.e., the low-density regions in the optimized solid structure. This approach leverages the multi-scale energy dissipation efficiency of the lattice structure while also working collaboratively with the solid structure to improve overall performance.
[0035] S6, based on the ABAQUS / Explicit platform, conducts three-point bending finite element simulation tests on all hybrid structures to ensure the accuracy and reliability of the simulation.
[0036] S7 boundary conditions were set according to existing experimental standards, using nylon PA2200 material. The indenter and fixed constraint were set as rigid bodies, and general contact with a friction coefficient of 0.2 was set for each contact surface to simulate real contact behavior. The simulation displacement was set to 6mm, and quasi-static bending simulation was performed using explicit dynamics. The displacement-load curve and bending deformation process were recorded to accumulate data for performance analysis.
[0037] S8 provides a detailed analysis of parameters such as displacement-load curves, peak load, average load, energy absorption, and specific energy absorption. It compares the parameters of different hybrid structures to evaluate their mechanical properties. For example, the TOPO-FCC solid hybrid structure demonstrates outstanding performance in terms of load-bearing capacity, bending stiffness, and energy absorption.
[0038] S9. Observe the stress distribution of the hybrid structure under displacements of 1mm, 3mm, and 5mm, and analyze the bending failure process. If stress concentration problems are found in the BCC solid hybrid structure and the FCC solid hybrid structure, while the TOPO-related hybrid structure can effectively improve the stress distribution and deformation, the structural design can be further optimized accordingly.
[0039] S10. Based on the analysis results, make targeted adjustments to the structure. For example, for stress concentration areas, adjust the layout of the lattice structure or the parameters of the members, and optimize the local shape of the solid structure to improve the overall performance of the structure.
[0040] Preferably, in step S2, the topology optimization method used is a density-based optimization method, which is implemented according to the density of each element in the model. This method employs a solid isotropic material penalty model (SIMP), in which the density value does not change continuously but can only take the values 0 or 1. Minimizing structural flexibility is the objective function of topology optimization, and its mathematical model is as follows:
[0041] Must comply with:
[0042] In the formula, It is the objective function; It is a vector of density design variables; This refers to the maximum and minimum allowable density; and It is a constraint function, where, It's a force balance constraint, which simply means that the structure has a deformation that ensures the external force and the force provided by the structure are equal. This refers to structural deformation being less than a certain value; M and N refer to the number of structures that satisfy this constraint; C represents flexibility, F is the load vector, K is the global stiffness matrix, and U is the displacement vector. Preferably, in step S2, the length of the beam ( l ) set to 60mm, width ( w ) is 10mm, thickness ( h The thickness of the top and bottom panels is 20mm. h a All are 2mm. The top and bottom panels are outside the design area; optimization was only performed on the middle mezzanine section. Span ( l a The load is set to 50mm, with a 100N load evenly distributed along the centerline of the upper plate surface. Target volume fraction ( V f The percentage was set at 30%.
[0043] Compared with the prior art, this application has the following advantages: (1) The designed hybrid structure, especially the TOPO-FCC solid hybrid structure, far surpasses the traditional structure in terms of load-bearing capacity, bending stiffness and energy absorption efficiency, and can operate stably under complex working conditions to meet the needs of high-end engineering; (2) The TOPO related lattice structure significantly improves the stress distribution of the hybrid structure, avoids stress concentration, optimizes the failure mode, improves the reliability and safety of the structure, and reduces the risk of structural damage; (3) The lattice solid hybrid reinforcement system breaks through the limitations of traditional structural design, integrates the advantages of lattice and topology-optimized solid structure, realizes the synergy of multi-scale energy dissipation mechanism, opens up a new direction for the field of structural design, and promotes the development of technological innovation.
[0044] The following is a specific implementation example of this application: This specific embodiment provides a design method for a lattice-solid hybrid structure, aiming to improve the overall performance of the structure by coupling typical lattice configurations with topology-optimized solid structures across scales. The specific implementation process is described in detail below for each key step.
[0045] S1, When constructing the lattice unit structure, parametric modeling is used, setting the diameter of each unit's rods to 0.5mm. For the lattice structure, based on its crystallographic characteristics, standard lattice units are constructed using the software's coordinate positioning and line drawing functions. These units are then arrayed and copied to form the required lattice structure, ensuring that all rod diameters are precisely 0.5mm. The constructed unit structure is as follows: Figure 4 As shown.
[0046] S2, the beam's length (l) is set to 60mm, width (w) to 10mm, and thickness (h) to 20mm. The thickness (h) of the top and bottom panels... a All are 2mm. The top and bottom panels are outside the design area; optimization was only performed on the middle mezzanine section. Span (l) aThe load is set to 50mm, with a 100N load evenly distributed along the centerline of the upper plate's surface. Target volume fraction (V f The percentage is set at 30%, such as Figure 2 As shown.
[0047] S3 uses topology optimization software with a three-point bending condition as the design condition. The material is set as PA2200, and its material properties, including elastic modulus and Poisson's ratio, are input. The optimization objective is to minimize the structural weight while meeting certain stiffness requirements, and the constraints are the geometric dimensions of the structure. After iterative calculations by the software, the topology-optimized beam structure is obtained, as shown below. Figure 3 As shown, it is exported in the common 3D model format STEP.
[0048] S4. Import the exported topology-optimized beam structure model into the 3D modeling software. Using Boolean operations and assembly functions, embed the previously created lattice structures one by one into the deleted areas of the topology-optimized beam structure. During the embedding process, the software's measurement and alignment tools ensure accurate relative positions between the lattice structures and the solid structures, achieving a tight fit. The structural combination includes a BCC solid hybrid structure (such as...). Figure 5 As shown), FCC entity hybrid structure (such as...) Figure 6 As shown), TOPO entity hybrid structure (such as...) Figure 7 As shown), TOPO-BCC solid hybrid structure (such as...) Figure 8 As shown), TOPO-FCC solid hybrid structure (such as...) Figure 9 (As shown). For example, for the TOPO-FCC solid hybrid structure, the TOPO-FCC lattice structure is precisely placed in a specific area of the solid beam structure to ensure a smooth transition between the lattice members and the connection points of the solid structure, thus completing the construction of the hybrid structure.
[0049] S5, based on explicit dynamics, determines parameters such as the density, elastic modulus, and Poisson's ratio of PA2200. In the assembly module, the model is rationally assembled and positioned to simulate the structural positional relationships in actual use. In the contact module, the "General Contact" type is selected, and the friction coefficient is set to 0.2 to simulate the real contact behavior in a three-point bending test. In the boundary condition module, constraints and loads are applied to the model strictly according to the experimental conditions of three-point bending. The indenter and fixed constraint are set as rigid bodies, and the simulation displacement is set to 6 mm to provide accurate boundary conditions for finite element analysis.
[0050] For the S6 lattice structure, due to its complexity and high precision requirements, a finely meshed tetrahedral grid with a size of 0.2 mm was used. For the solid structure, a hexahedral grid with a size of 0.5 mm was used to balance computational efficiency and accuracy. After meshing, the software's mesh quality check tool was used to ensure good mesh quality, with no distorted or excessively twisted meshes, thus guaranteeing accurate calculation results.
[0051] S7. Based on the compiled data, a comprehensive evaluation of the mechanical properties of different hybrid structures is conducted. Taking the displacement-load curve as an example (e.g.) Figure 10 As shown), analyze the deformation characteristics and load-bearing capacity changes of each structure in the elastic and plastic stages; compare the peak load and the average load to evaluate the ultimate bearing capacity and average bearing capacity of the structure (e.g., Figure 11 As shown); through energy absorption and specific energy absorption data (such as... Figure 12 As shown in the figure, the energy absorption efficiency of the structure is determined. For example, the analysis found that the TOPO-FCC solid hybrid structure has the highest load-bearing capacity and the strongest bending stiffness under the same displacement conditions, and performs well in terms of energy absorption and specific energy absorption. The bar chart comparing the peak loads of each structure clearly shows the advantages of the TOPO-FCC solid hybrid structure.
[0052] S8 analyzes the stress distribution of the hybrid structure under displacements of 1mm, 3mm, and 5mm, and delves into stress concentration areas and structural deformation. Stress concentration issues are observed in the BCC and FCC solid hybrid structures. The BCC solid hybrid structure exhibits significant stress concentration at certain member connections, attributed to the geometry and force transfer mechanism of the lattice structure. However, this situation is improved in the TOPO, TOPO-BCC, and TOPO-FCC solid hybrid structures, with severe tensile stresses occurring along the central axis, demonstrating that the TOPO, TOPO-BCC, and TOPO-FCC lattice structures are beneficial for improving stress distribution and deformation in hybrid structures.
[0053] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A method for designing a lattice solid hybrid structure, applied in engineering structural design, characterized in that, Includes the following steps: S10, construct solid structure and cube structure models, perform topology optimization on the solid structure to obtain the optimized solid structure, and perform topology optimization on the cube structure to obtain the TOPO lattice; S20, the TOPO lattice is geometrically coupled with the BCC or FCC regular lattice to form a TOPO-BCC or TOPO-FCC hybrid lattice, and then normalized. S30, the normalized hybrid lattice is embedded into the region where the density design variable is 0 in the optimized solid structure to construct a lattice solid hybrid structure; S40 establishes a finite element model based on an explicit dynamic platform, applies three-point bending boundary conditions, analyzes the load-displacement response and stress distribution of the lattice solid hybrid structure, and then adjusts the layout and parameters of the hybrid lattice and the shape of the solid structure according to the analysis results to achieve synergistic optimization of structural load-bearing capacity, bending stiffness and energy absorption efficiency.
2. The lattice solid hybrid structure design method as described in claim 1, characterized in that, In step S10, the solid structure includes an upper panel, a lower panel, and an intermediate layer, wherein the intermediate layer is a topology optimization region.
3. The lattice solid hybrid structure design method as described in claim 1, characterized in that, In step S10, the topology of the solid structure is optimized using the variable density method to obtain the optimized solid structure, and the topology of the cubic structure is optimized using the level set method to obtain the TOPO lattice.
4. The lattice solid hybrid structure design method as described in claim 3, characterized in that, The variable density method employs a solid isotropic material penalty model, with the density design variable taking values of 0 or 1, and the optimization objective is to minimize structural flexibility.
5. The lattice solid hybrid structure design method as described in claim 1, characterized in that, In step S20, geometric coupling includes setting the diameter of the rods of each unit structure in the lattice structure through parametric modeling, and forming the required lattice structure through array replication.
6. The lattice solid hybrid structure design method as described in claim 1, characterized in that, In step S30, the regions in the optimized solid structure where the density design variable is 0 are determined based on the SIMP algorithm, with volume fraction as the constraint condition.
7. The lattice solid hybrid structure design method as described in claim 1, characterized in that, In step S40, the three-point bending boundary conditions include: setting rigid body indenter and support constraints, simulating the three-point bending condition, and defining interface interaction through the contact friction coefficient.
8. The lattice solid hybrid structure design method as described in claim 1, characterized in that, In step S40, the finite element model established based on the explicit dynamics platform uses tetrahedral meshes to divide the lattice structure part and hexahedral meshes to divide the optimized solid structure part.
9. The lattice solid hybrid structure design method as described in claim 1, characterized in that, Step S40, which involves adjusting the layout and parameters of the hybrid lattice and the shape of the solid structure based on the analysis results, specifically includes: Analyze the stress distribution of the lattice solid hybrid structure under different displacement conditions to determine the stress concentration region; For stress concentration regions, adjust the layout of the hybrid lattice or the parameters of the bars to optimize the shape of the solid structure; The adjusted structure was re-analyzed using finite element analysis to verify the adjustment effect until the expected synergistic optimization goal was achieved.
10. A lattice solid hybrid structure, characterized in that, The structure is designed by the lattice solid hybrid structure design method according to any one of claims 1 to 9, including the optimized solid structure and the TOPO-BCC or TOPO-FCC hybrid lattice embedded therein.