基于架构开发的汽车悬架控制臂优化设计

Optimization Design for Vehicle Suspension Control Arm Based on Architecture Development

为有效解决汽车架构开发中悬架控制臂的疲劳耐久问题,研究了某架构项目后悬架下控制臂的设计优化方法。采用多体动力学、有限元方法、耐久评估、结构优化设计等技术,研究架构项目调试件参数对后下控制臂载荷和耐久性能的影响规律,找出架构带宽中对于控制臂设计最恶劣的参数组合,对其耐久性能进行仿真分析和优化,使其耐久性能可满足整个架构带宽的需求,并借助台架试验和整车路试对其疲劳寿命进行考核和验证。结果证明,文章提出的设计思路和方法有效,可拓展应用于其他底盘零件。

In order to effectively solve the problem of fatigue durability of suspension control arm in the development of automobile architecture, the design optimization method of the lower control arm of rear suspension of an architecture project is studied. By using multi-body dynamics, FEA, durability evaluation, structural optimization design and other technologies, the law that how the tuning parameters influence the load and the durability performance of the rear lower control arm based on the architecture project is studied. The worst combination of parameter for the design of the rear lower control arm is found out and be used to the durability evaluation and design optimization of the parts. The control arm with this process can meet the design target of all the architecture bandwidth. With the help of rig test and vehicle road test, the fatigue life is evaluated and verified.The results show that the design idea and method proposed in this paper works well and can be applicable to other chassis parts.