乘用车后轴结构强度和刚度的分析  

Analysis of the Strength and the Stiffness of the Rear Axle in a Passenger Car

作　　者：尹辉俊[1] 王雨[1] 姜美姣 叶文龙[1] 

机构地区：[1]广西工学院机械工程学院,广西柳州545006

出　　处：《机械设计与制造》2014年第2期49-51,共3页Machinery Design & Manufacture

基　　金：广西高等学校优秀人才资助计划项目(桂教人〔2011〕40号);广西自然科学基金项目(2013GXNSFAA019319);广西科技计划项目(桂科攻1348005-12);广西重点实验室建设项目(13-051-38);广西研究生教育创新计划资助项目(2013105940802M01)

摘　　要：针对某乘用车后轴在进行疲劳台架试验时扭杆处发生早期疲劳断裂的问题,采用有限元法,在三维建模软件UG NX中建立此后轴的三维几何模型,并运用HyperWorks软件建立后轴有限元模型,以NX.Nastran为求解器,参照后轴疲劳台架试验大纲,对后轴结构强度进行仿真分析,找出了扭杆疲劳断裂的原因,提出在保证原扭转刚度不变的情况下,适当增加扭杆厚度以提高其疲劳性能的解决方案。通过计算不同厚度扭杆的刚度、强度及疲劳台架试验,验证了方案的可行性。h aims at the early fatigue frture problem of the torsion bar of the rear axle in a passenger car during the Jgigw bench test. Here, a 3D solid model of the rear axle is built by software UG NX, ozd a finite element model of the rear axle is built by sojware HyperWorks and NX. Nastran is seen as the solver to simulate and analyze the structural strength according to the principle of rear axle .fittigue bench test. The reason. of the torsion bar earl tigT,e fracture are revetded. An improvement is propased： increasing the thickness of the torsion bar appropriolely on the condition that the torsional rigidity remains constant, the fatigue peuformance can be improved. By calculating the stiffness and strength of the different thicness uf the torsion bar and some.fatigue bench tests, the improvement is proven.

关 键 词：后轴 有限元分析 刚度 疲劳试验 

分 类 号：TH116[机械工程—机械设计及理论]