某乘用车前部悬架控制臂轻量化设计

Lightweight design of automobile front suspension’s control arm

针对乘用车的前部悬架控制臂质量过重问题,对某款车型的前部悬架控制臂,提出了两种轻量化设计方案。参照目前汽车使用较为广泛的铝合金与高强度钢两种轻量化材料,在初始设计方案基础上,分别对前部悬架控制臂进行了结构设计,并通过CAE仿真分析对给定工况下的前部悬架控制臂的静态性能以及疲劳寿命进行研究;同时,综合成本、轻量化程度和成型性能等多项因素,对比选出最优方案。经筛选,采用热成型高强度钢制得的前部悬架控制臂最佳,其成本可控制在较低范围,并且在满足强度与刚度的前提下实现了质量减小34%,其疲劳寿命也得到了显著提高。

Aiming at the problems of excessive mass of the front suspension control arm of the passenger car,and two optimized design schemes were proposed for the front suspension control arm of a particular car model.Referring to the current lightweight materials of aluminum alloy and high-strength steel,which are widely used in automobiles,the control arm was structurally designed based on the initial design scheme,and the static performance and fatigue life of the control arm under given conditions by CAE simulation analysis were studied.Meanwhile,the optimal solution was selected based on a number of factors such as overall cost,lightness and formability.After selecting,the control arm made of thermoformed high-strength steel is the better,the cost could be controlled in a lower level,and the control arm’s mass had reduction of 34%under the premise of satisfying strength and rigidity,and the fatigue life was also significantly improved.