面向多目标的汽车悬架控制臂拓扑优化研究.docx

机械工程学报

第53卷第4期Vol.53No.4

2017年2月JOURNALOFMECHANICALENGINEERING

Feb.2017

DOI：10.3901/JME.2017.04.114

面向多目标的汽车悬架控制臂拓扑优化研究*

张志飞1,2陈仁2徐中明1,2贺岩松1,2李伟2

(1.重庆大学机械传动国家重点实验室重庆400030；

2.重庆大学汽车工程学院重庆400030)

摘要：针对结构的多目标拓扑优化设计，提出一种基于折衷规划法归一化子目标建立综合目标函数、以灰色综合关联分析确

定综合目标函数中子目标权重系数的方法。以某商用车悬架控制臂为例，运用动力学分析、静力学分析和模态分析，得到控

制臂在典型工况下的刚度性能、强度性能和固有频率。用板结构进行拓扑优化和形貌优化确定控制臂外轮廓形状，再分别采

用单目标拓扑优化降低典型工况下的柔顺度和提高前三阶固有频率，并采用多频率加权方式来抑制频率单目标优化时的振荡

现象。将单目标拓扑优化形成的子序列与各个目标最优值形成的最优序列进行灰色综合关联分析，得到子目标的权重系数。

用折衷规划法进行多目标拓扑优化，根据优化结果对控制臂进行改进设计。改进后结构分析表明：优化后的控制臂质量减轻

9.3%，整体刚度性能和强度性能明显增强，各阶固有频率均有不同程度提高。

关键词：拓扑优化；多目标；悬架控制臂；折衷规划法；灰色综合关联分析

中图分类号：U463

ResearchonMulti-objectiveTopologyOptimizationofVehicleSuspension

ControlArm

ZHANGZhifei1,2CHENRen2XUZhongming1,2HEYansong1,2LIWei2

(1.TheStateKeyLaboratoryofMechanicalTransmission,ChongqingUniversity,Chongqing400030;

2.SchoolofAutomotiveEngineering,ChongqingUniversity,Chongqing400030)

Abstract：Aimingatthemulti-objectivetopologyoptimizationdesignofstructure,amethodispresentedbasedoncompromise

programmingtonormalizeeachsubobjectivetoestablishcomprehensiveobjectivefunction,withgreycomprehensiverelational

analysistodeterminetheweightfactorsofthesubobjectiveofthecomprehensiveobjectivefunction.Focusingonthesuspension

controlarmofacommercialvehicle,thedynamicanalysis,staticanalysis,andmodelanalysisareusedtoobtainthestiffnessand

strengthperformanceundertypicaloperationsandnaturalfrequency.Theshapeoftheoutercontourisdeterminedbytopologyand

topographyoptimizationofaplate.Usingsingleobjectivetopologyoptimizationtoreducestaticcompliancesandimprovethefirst

threenaturalfrequency,andtheoscillationofthesingleobjectiveoptimizationwithfrequencyissuppressedbymulti-frequency

weightingmethod.Thesubsequencesandoptimalsequenceobtainedbysingleobjectivetopologyareexertedcomprehensive

relatio