基于拓扑优化理论和密度惩罚法,首先建立了以单元相对密度为设计变量、以体积比为约束的柔顺机构拓扑优化模型,然后在模型中加入了单元等效应力计算模块,并利用MATLAB软件平台,以悬臂梁的拓扑优化为例考察了体积比的取值对优化结构中最大等效应力的影响,最后仍然以悬臂梁为例提出了一种根据许用应力条件寻找最佳体积比的方法。 Based on topological optimization theory and density penalty method, the topology optimization model of compliant mechanism with relative unit density as design variable and volume ratio as constraint is established. Then, the unit equivalent stress calculation module is added into the model, and MATLAB software platform Taking the cantilever topological optimization as an example, the effect of the volume ratio on the maximum equivalent stress in the optimized structure was investigated. Finally, a method of finding the best volume ratio according to the allowable stress condition was proposed. .