关键词: 下控制臂；形状优化设计；轻量化设计；屈曲性能

Abstract: The lower control arm needs to have a certain strength and stiffness to resist extrusion, impact deformation, and also needs to have a high natural frequency to avoid low-frequency resonance and noise. Taking the lower control arm of a research automotive as the lightweight design object in this paper, the design risk of insufficient buckling force is identified through simulation analysis, and the control arm is redesigned using a combination of shape and topology optimization methods, and performance simulations are conducted on the new design. The results show that the new control arm eliminated the design risk of insufficient buckling force, resulting in 6.6% weight reduction compared to the original design. This paper adopts linear optimization method to solve the highly nonlinear buckling force optimization problem, identifies the load transmission path through topology optimization, and provides new ideas for the buckling force optimization and lightweight design of automotive control arms.

Key words: Lower control arm; Shape optimization design; Lightweight design; Buckling performance