Three-dimensional physical-structure topological optimization method and system

Abstract

The invention discloses a three-dimensional physical-structure topological optimization method and system. By adopting three-dimensional CAD software for creating a structural model of a three-dimensional physical structure, the structural model is imported into infinite element analysis software, an infinite element model is created, and an optimization area is determined and stored in an optimization area unit; a functional section decomposition method is utilized to conduct topological optimization dimensional deduction on the three-dimensional physical structure to obtain multiple groups of two-dimensional functional sections; topological optimization is conducted on the two-dimensional functional sections to obtain an optimization result of each functional section; through grouping matching, a corresponding relation of the optimization result of each section is determined, and a sweeping method in the three-dimensional CAD software is adopted for reconstructing a curved surface toobtain a three-dimensional reconstruction model; according to process constraint conditions, dimension optimization is conducted on the three-dimensional reconstruction model to obtain an optimized three-dimension model. By means of the method and system, the topological optimization efficiency of a large-scale and complicated structure can be improved, and the readability of a topological optimization result can be improved.

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 for equipment such as light weight and high load capacity are becoming more and more significant, and 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 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 rel...

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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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