A continuum and discrete body coupling topology optimization method

Abstract

A continuum and discrete body coupling topology optimization method is provided. The invention solves the problem that the topology optimization method of the continuum or the discrete body alone in the prior art can not accurately obtain the optimal topology configuration of the continuum and the discrete body coupling structure form. At first, a finite element mesh model of coupling of degrees of freedom of a continuum and a discrete body is established, then a unified optimization model of a continuum and a discrete body is established, and the objective function, constraint condition, optimization method and convergence criterion are set in the optimization model. Finally, the optimal topology configuration of the continuum and discrete body is obtained by performing optimization solving based on the defined optimization model and displaying the topology optimization results. The invention can realize topology optimization of a continuum and discrete body coupling structure, improve specific stiffness of the continuum and discrete body coupling structure, realize lightweight of continuous and discrete body coupling structure on the premise of ensuring mechanical performance, and provide effective solution for conceptual design of continuous and discrete body coupling structure.

Description

technical field [0001] The invention relates to the technical field of structural optimization design, in particular to a topology optimization method for coupled continuum and discrete body. Background technique [0002] Structural optimization design methods mainly include size optimization, shape optimization, and topology optimization. Among them, topology optimization is a commonly used method in the conceptual design stage of structures. Distribution form, that is, to optimize the shape, size and position of holes. The current method of structural topology optimization is to optimize the topology of the continuum or the topology optimization of the discrete body alone, that is, to optimize the overall material distribution of the continuum design domain or to optimize the distribution of trusses and rigid frames in space. However, many actual engineering structures are load-bearing structures that couple continuum and discrete bodies, such as bus shells, rocket shells...

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Problems solved by technology

[0003] Based on this, it is necessary to address the fact that the topology optimization method for continuum or discrete body alone in the prior art is not very applicable to this type of model, and there is a problem that the optimized model is inconsistent with the actual model, so that topology optimization cannot accurately obtain the continuum and discrete The problem of the optimal topology configuration of the coupled structure of discrete bodies provides a topology optimization method for the coupling of continuum and discrete bodies

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