Full-stress structure topological optimization design method based on continuous phase step reference stress

Abstract

The invention relates to a fully-stress structure topological optimization design method based on continuous phase step reference stress, which comprises the following steps: hardening a material in a high-stress area of a structure and softening the material in a low-stress area of the structure; taking the reference stress which can continuously carry out phase step change as a judgment standard; and through two optimizing cycles of local optimization and overall optimization, avoiding a premature phenomenon in the optimizing process, thereby leading the stress distribution of the structureto be gradually optimized.

Description

technical field [0001] The invention relates to a structure design technology, in particular to a topology optimization design method of a full-stress structure based on continuous step reference stress. Background technique [0002] Structural topology optimization refers to seeking the optimal topology of structural material distribution to optimize some properties of the structure or reduce the weight of the structure. Structural topology optimization has been developed for more than 100 years, and can be roughly divided into analytical methods and numerical methods. Analytical method uses classical mathematical theory to solve the problem, which is not convenient for direct application in engineering practice. In recent decades, due to the widespread application of computers in structural analysis, the numerical methods for structural optimization have developed rapidly, which are mainly divided into two categories: one can solve the size, shape and topology optimizatio...

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Problems solved by technology

However, different reference stresses have a great influence on the optimization results. If the reference stress is too large, it will lead to over-deletion, and if it is too small, it will lead to low e

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