关键词: 下摆臂；轻量化；结构优化；拓扑优化

Abstract: This article combines the motion characteristics of the lower control arm to design a lightweight suspension lower control arm for a certain automobile. Firstly, a lower control arm model is established, and its stress state under typical extreme operating conditions is determined through finite element analysis. Then based on the stress state analysis, the design redundancy of the lower control arm is determined. The design redundancy of the lower control arm is evaluated. With the minimization of the lower control arm’s mass as the optimization objective and the thickness of the upper and lower plates as design variables, topology optimization is conducted. Finally, based on the topology optimization results, lightweight design of the lower control arm is implemented through the design concept of thinning and digging holes. The results show that the optimized lower control arm structure meets the performance requirements in terms of strength, buckling performance, and dynamic characteristics, and has a good weight reduction effect.

Key words: lower control arm; lightweight; structural optimization; topology optimization