基于有限元法的某微型货车车身疲劳寿命分析  

Fatigue Life Analysis of a Mini Truck Body Based on FEM

作　　者：赵婷婷[1] 李长波[2] 王军杰[1] 朱庆成[1] 孙亮 

机构地区：[1]上海交通大学CIMS研究所,上海200240 [2]芜湖信息技术职业学院电子信息系,芜湖241003 [3]上海律成车辆技术研发有限公司,上海200240

出　　处：《汽车工程》2011年第5期428-432,共5页Automotive Engineering

摘　　要：建立某微型货车车身的有限元模型,在MSC.NASTRAN中采用惯性释放法对其进行静态分析并得到其应力分布状况,再在MSC.ADAMS/Car中建立该车的刚柔耦合多体动力学模型,得到其在H级路面的载荷谱。在这些基础上,在MSC.FATIGUE中进行白车身的疲劳寿命分析,分析结果与试验数据比较吻合。对寿命较短的部位进行改进,取得良好的效果。A finite element model for a mini truck body is built,on which a static analysis is conducted by using inertia relief technique in MSC.NASTRAN with its stress distribution obtained.Then a rigid-flexible coupling multi-body dynamic model is set up in MSC.ADAMS/Car with load spectra of H-grade road acquired.Based on these,a fatigue life analysis of the body-in-white is performed in MSC.FATIGUE with a result agreeing relatively well with test data.Some locations in the truck body with shorter fatigue life are modified and get good results.

关 键 词：微型货车 疲劳寿命 有限元法 惯性释放 刚柔耦合模型 

分 类 号：U461.1[机械工程—车辆工程]