基于Inspire的悬置支架结构优化设计

Structural Optimization Design of Suspension Bracket Based on Inspire

以某汽车悬臂支架为研究对象,利用SolidThinking Inspire,以支架的刚度最大化为设计目标,以设计空间的单元相对密度为设计变量,以模型体积和位移为约束条件,对原模型结构进行初步优化设计,去除了原模型多余材料,并利用Creo和Inspire对模型进行了重构,得到了两种重构模型,重构后模型质量分别约降低52.75%和49.78%。对比优化前后有限元静强度分析结果发现,该模型优化后的米塞斯应力虽然有所上升,但是仍远小于材料屈服强度。此外,观察重构模型发现,在拓扑优化过程中,PolyNURBS建模方法具有更好的模型重构潜力。最后,通过有限元分析结果验证了优化的有效性,可为结构后续设计提供一定依据,提高了工作效率。

The cantilever support of an automobile is taken as the research object by using SolidThinking Inspire.By taking the maximization of the stiffness of the support as the design goal,the relative density of the elements in the design space as the design variables,and the model volume and displacement as the constraints.The structure of the original model is preliminarily optimized and the surplus materials of the original model are removed.Creo and Inspire are used to reconstruct the model,and two reconstruction models are obtained.The quality of the model is reduced by about 52.75%and 49.78%after reconstruction.Comparing the results of finite element static strength analysis before and after optimization,it is found that although the Mises stress after optimization has increased,it is still far less than the yield strength of the material.In addition,by observing the reconstructed model,it is found that PolyNURBS modeling method has better model reconstruction potential in the process of topology optimization.Through the finite element analysis results,the effectiveness of the optimization is verified,which provides a certain basis for the subsequent design of the structure and improves the work efficiency.