基于机构运动学的多连杆悬架下控制臂优化

Optimal Design of Control Arm for Vehicle Multi-link Beam Suspension Based on Mechanism Kinematics

为实现某多连杆悬架下控制臂的轻量化设计,结合机构运动学和有限元优化方法,通过运动包络技术获得下控制臂的初始设计域,综合运用拓扑优化和尺寸优化技术确定下控制臂的优化设计方案。通过典型工况强度校核以及样车可行性与可靠性试验综合验证,实现了满足运动空间和强度要求下控制臂的正向设计。文章提出的优化设计方法能够为汽车悬架零部件的轻量化设计提供参考。

The purpose of this paper is to realize the light-weigh design of low control arm（LCA）. On the basis of kinematic analysis and finite element method, the kinematic enveloped space was determined using digital prototype technology, and the topology and size optimization was conducted to obtain the optimal design scheme. Adopting DMU in the typical working cycle and automotive feasibility and reliability tests to realize the forward design of LCA is introduced in the paper, which meet kinematic space and strength requirements. The design and optimization methods proposed in this paper provided a reference for lightweight design of automotive suspension parts.