汽车转向节拓扑优化方法研究及应用

Study and Application of Topology Optimization Technique for Vehicle Steering Knuckles

为使汽车悬架系统中机件转向节在轻量化的基础上满足各工况下的汽车动力学性能要求,运用折衷规划法定义多工况下转向节的静态刚度和第1阶模态频率最大化的综合目标函数,进行结构的拓扑优化。以某方程式赛车转向节为例进行优化的结果表明,转向节的刚度和1阶模态频率均有显著提高,质量有所减轻,说明该方法可行有效。

For steering knuckle, the key part of vehicle steering system, to meet the dynamics performance requirements of vehicle in different conditions on the base of lightweighting, a combined objective function for maximizing both the static stiffness and the first order modal frequency of steering knuckle under multi-conditions is defined by applying the compromise programming technique, and a structural topology optimization is conducted on the steering knuckle of a Formula racing car as an example. The results show that both the static stiffness and the first order modal frequency of steering knuckle increase significantly with some reduction in its mass, indicating the feasibility and effectiveness of the technique adopted.