A three-dimensional solid structure topology optimization method and system

Abstract

The invention discloses a three-dimensional solid structure topology optimization method and system. By using three-dimensional CAD software to establish a three-dimensional solid structure structural model, importing the structural model into finite element analysis software, establishing a finite element model and determining an optimization area, the optimization area is Stored in the optimization area unit; use the functional section decomposition method to perform topology optimization and dimension reduction on the three-dimensional solid structure to obtain several groups of two-dimensional functional cross-sections; perform topology optimization on several groups of two-dimensional functional cross-sections to obtain the optimization results of each functional cross-section; Match to determine the corresponding relationship of the optimization results of each section, use the sweeping method in the 3D CAD software to reconstruct the surface, and obtain the 3D reconstruction model; according to the process constraints, the size of the 3D reconstruction model is optimized to obtain the optimized 3D model. . The invention can improve the efficiency of topology optimization of large and complex structures, and can enhance the readability of the topology optimization results.

Description

technical field [0001] The invention relates to the technical field of entity structure topology optimization, in particular to a three-dimensional entity structure topology method and system. Background technique [0002] In the fields of aerospace, automobiles, ships, etc., the performance requirements of equipment such as light weight and high bearing capacity are becoming more and more obvious, and the structural topology optimization design has become a research hotspot in various industries at home and abroad. Topology optimization is to redistribute the space of materials when the topological relationship of the structure is unknown. Due to the change of the boundary shape of the structure during the optimization process, the difficulty of quantitative description of design variables, and the unknown design area in advance, the solution of topology optimization is very difficult. increase, therefore, the development of topology optimization theory is relatively slow. ...

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Problems solved by technology

Topology optimization is to redistribute the space of materials when the topological relationship of the structure is unknown. Due to factors such as the boundary shape of the structure will change during the optimization process, the design variables are difficult to describe quantitatively, and the design area is unknown in advance, the solution of topology optimization is very difficult. increase, therefore, the development of topology optimization theory is relatively slow

[0003] At present, for the three-dimensional solid structure under complex working conditions, the variable density topology optimization method integrated in the simulation optimization software is generally used. However, due to the complexity of the structure and working conditions, numerical instability often occurs in the optimization process, which leads to long time consumption. It is difficult to accurately identify the results of topology optimization, which makes it difficult to provide effective guidance for structural optimization. Therefore, it is necessary to explore more effective ideas to solve these problems.

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