机理分析汽车悬架控制臂的多目标拓扑优化.pdf

学兔兔 汽 车 工 程 2011年(第33卷)第2期 Automotive Engineering 201 1029． 汽车悬架控制臂的多目标拓扑优化 祝小元，方宗德，中闪闪，戚玉轩 (西北工业大学机电学院，西安 710072) [摘要] 以多工况下的柔度(静态)和振动固有频率(动态)为目标函数，对汽车悬架控制臂进行多目标拓扑优 化。基于SIMP变密度的拓扑优化方法，将多级容差序列规划与折衷规划法相结合，首先进行自由振动工况下的频 率优化，然后以此为基础进行静态工况下的柔度优化，最终得到了同时满足静态柔度最小和振动低阶频率最高要求 的控制臂拓扑结构。 关键词：悬架控制臂；多目标；拓扑优化；多级容差序列规划；折衷规划 Multi—objective Topology Optimization for the Control Arm of Vehicle Suspension Zhu Xiaoyuan，Fang Zongde，Shen ShanshanQi Yuxuan School ofMechatronics，Northwestern Polytechnical University，Xian 710072 [Abstract] A multi-objective topology optimization for the control a13n of vehicle suspension is conducted with the compliance(static state)under multi—conditions and the natural frequency of vibration(dynamic state)as objective functions．Based on the SIMP method of topology optimization and combining multilevel tolerant sequential programming approach with compromising programming scheme，first the frequency optimization under free vibration condition and then the compliance optimization at static condition are performed in sequence．Finally，a topological structure of control arm is obtained meeting the both requirements of minimum compJ~ance at static state and highest low—order frequency under dynamic vibration． Keywords：suspension control arm；multi—objective；topology optimization；multilevel tolerant sequen- tial programming；compromising programming 结构柔度和固有频率之间的不一致性和不可公度 日lJ百 性_4 J，以上文献中的方法很难得到悬架控制臂最优