Component topology optimization design method for complex assembly

Abstract

The invention relates to a component topology optimization design method for a complex assembly, and aims to solve the problem of difficulty in the determination of boundary conditions in a topology optimization design process for components of the complex assembly. The method comprises the following steps of: establishing and analyzing an assembly finite element model, and extracting and exporting the boundary conditions of a sub-structure which is a component to be optimized in the assembly model; loading the extracted boundary conditions onto the component to be optimized, and performing topology optimization on the component by utilizing a density method; when a change in the size of an optimization object exceeds a preset value, re-extracting the boundary conditions of the component, and continuing performing the topology optimization on the component; and when the optimization object is consistent with an iteration stopping condition, stopping optimization iteration to obtain a final optimal structure. An accurate optimal structure of the component can be obtained by accurately determining the boundary conditions of the component, and the problems of a plurality of design variables, inaccurate contact definition of combination parts between components and large calculated amount caused by the direct adoption of the assembly for the topology optimization design are solved.

Description

technical field [0001] The invention relates to a structure optimization design method, in particular to a component topology optimization design method of a complex assembly. Background technique [0002] Structural topology optimization plays an important role in the initial stage of engineering structure design, and can provide designers with a conceptual design of the optimal structural layout. At the present stage, the optimal design of complex assembly structures at home and abroad usually only carries out low-level size optimization, which limits the degree of freedom in design and limits the optimality of design results. Starting from the structural optimization design theory, the comprehensive optimal design of the structure must start from the conceptual design based on structural topology optimization, and then through the detailed design of structural shape optimization and size optimization, so as to obtain the optimal structure. However, due to the current str...

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Problems solved by technology

[0004] Aiming at the problem of difficulty in determining the boundary conditions of components in structural topology optimization, the present invention proposes a component topology optimization design method for complex assemblies, and accurately determines its boundary conditions in the process of component structure topology optimization through a substructure-based method , so that the topology of the component structure gradually becomes better

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