复合空气悬架导向臂仿竹子结构设计及多目标优化  

Bamboo-like structure design and multi-objective optimization of guiding arms of a composite air suspension

作　　者：邓香林 徐峰祥[1,2] 邹震 DENG Xianglin;XU Fengxiang;ZOU Zhen(Hubei Key Laboratory of Modern Automobile Part Technology,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Innovation Center of Automotive Component Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《重庆理工大学学报（自然科学）》2023年第5期118-128,共11页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(51975438);高等学校学科创新引智计划项目(B17034)。

摘　　要：针对复合空气悬架导向臂的轻量化问题,受启发于竹子的截面形状、变截面、竹节等结构特征,运用结构仿生的方法设计了仿生导向臂。运用参数敏感性分析方法探明了影响仿生导向臂性能的关键参数,选取对导向臂性能影响较大的肋板和内孔截面参数为设计变量,导向臂总质量与最大变形最小为优化目标开展多目标优化研究,结合熵权TOPSIS-灰色关联分析的多目标决策法确定了Pareto解集中的最优参数方案。结果表明:多目标优化后的仿生导向臂较之原型导向臂在质量减小17.44%的前提下,最大变形降低9.24%、等效应力下降17.33%、一阶预应力约束模态频率上升22.92%,证明了结构仿生设计方法在导向臂轻量化设计上的可行性,为导向臂的结构轻量化设计提供理论依据。In view of the lightweight of a composite air suspension guiding arm,inspired by the structural characteristics of cross-section shape,variable sections and joints of bamboos,this paper designs a bionic guiding arm through the structural bionic method.Through parameter sensitivity analysis,key parameters affecting the performance of the bionic guiding arm are firstly investigated.With a great influence on the performance of the guiding arm,the rib plate and inner hole cross-section parameters are then selected as the design variables.Besides,the total mass and the minimum value of maximum deformation of the guiding arm are selected as the optimized targets for multi-objective optimization.Finally,the optimal parameter scheme of the Pareto solution set is determined by combining entropy-weight TOPSIS-gray correlation analysis with the multi-objective decision method.The results show that,under the premise that the mass of the prototype guiding arm reduces by 17.44%,the bionic guiding arm after multi-objective optimization shows a decrease in the maximum deformation by 9.24%,a decrease in the equivalent force by 17.33%,and an increase in the first-order prestressed constraint mode frequency by 22.92%.The study in this paper strongly proves the feasibility of the structural bionic design optimization method in the lightweight design of the guiding arm,which has certain reference significance for the structural lightweight design of guiding arms.

关 键 词：导向臂 轻量化 竹子 结构仿生 多目标优化 

分 类 号：U469.72[机械工程—车辆工程]