多相材料的柔性机构拓扑优化设计

摘要

基于变密度法建立了多相材料的插值模型,并建立了以结构输出点位移最大为目标、材料体积为约束的多相材料柔性机构拓扑优化数学模型.运用移动渐近线方法对微型柔性夹钳设计开展拓扑优化并对结果进行分析.结果表明:基于多相材料的柔性机构拓扑优化方法能大幅降低拓扑结构的最大应力水平,但也一定程度上减小了结构输出点的位移.整体而言,该方法具有可行性,能有效解决工程中遇到的因应力过大而导致的结构失效问题.%Based on the variable density method,the interpolation model for multiphase materials is established,and the topology optimization model for the compliant mechanisms with the maximum displacement of the structure and the material volume as the constraint is established.The miniature flexible clamp for example,with the Method of moving asymptotes(MMA) to complete the calculation,and the topology results are analyzed.The results show that the topology optimization method of compliant mechanisms for multiphase materials is feasible,which can significantly reduce the maximum stress level of the topology structure,but also to a certain extent,the displacement of the output point of the structure is reduced.As a whole,the method is feasible,and can effectively solve the problem of structural failure caused by excessive stress in the project.