基于动态弯曲疲劳试验的汽车车轮有限元分析_王霄锋.pdfVIP

34 1　　　　　　　　　　　　　　　 　　　　　　　　　　　　　　　　Vo.l 34No. 1 2007 2 　　　　　　　　　　　　　　　TractorFar Transporter　　　　　　　　　　　　　　　　 Feb., 2007 1 1 2 王霄锋 , 梁　昭, 张小格 (1. , 　100084;2. , 　442042) :针对车轮动态弯曲疲劳试验建立了汽车车轮静态加载有限元模型。 它可以反映出车轮在静态加载 件下的高应力区域 及其 VonM ises应力值。 对车轮进行静态加载试验结果与有限元计算结果吻合得较好, 验证了有限元方法的有效性。通过与动态 弯曲疲劳试验的比较, 验证了静态试验中的应力集中区域即为疲劳试验中车轮开裂的区域。通过改进车轮结构设计来降低应力集 中区域的应力值, 可以有效提高车轮寿命。静态有限元分析对于进行这样的改进设计具有重要的指导作用。 :;;; :U463. 342　　　　　:B　　　　　:1006-0006(2007)01-0045-03 Finite ElementAnalysis of aW hee lBased on theW heelDynam ic Cornering Fatgi ue Test 1 1 2 WAN G X iao-f eng , LIAN G Z hao , ZHAN G X iao-ge (1. State Key Laboratory ofAuto otive Safety and Energy, Tsinghua University, Beijing 100084, China; 2. DongfengAuto otivewheelCo., Ltd., Shiyan 442042, China) Abstract:The finite ele ent odel of awheelunder static load conditionwas builtup based on thewheel dyna ic bending fatigue tes,t which can be used to deter ine the critical areas in thewheel structurewhere theVonM ises stresses are high. The results of the experi ental stressanalysis ade for the static loading test agreewith the resultsof the finite ele ent analysis quitewel,l which indicates that the finite ele ent odel is effective and valid. The results also show that the critical areas ofhigh stress levelunder static loading condition arewhere the fatigue cracks initiate in the dyna ic fatigue tes.t So that the durability of thewheel can be effectively increased by i proving thewheel design to lower the stress levels of the critical areas. Such design i prove ent can be effectively guided by the static finite ele ent analysis. Key words:Auto obile;W hee;l FEA;Fatigue 　　。