摘要
以CAE技术为基础,对某厂13方混凝土搅拌运输车的副车架结构进行多轴疲劳分析。为了能够准确预测车架结构的疲劳寿命,采用有限元分析和多体动力学相结合的方法。在有限元软件ANSYS中建立了车架的有限元模型并进行强度分析;通过多体动力学模型仿真整车在B级路面的随机激励下的运动状态,提取钢板弹簧与车架连接位置的载荷历程;并在此基础上根据车架材料的疲劳性能数据和合适的疲劳损伤模型利用疲劳分析软件FE-Safe进行了车架的多轴疲劳分析,得到了车架的疲劳寿命分布情况以及容易发生疲劳失效的位置。分析结果与路试结果对比表明,该方法可在设计阶段有效预估汽车关键零部件在非比例载荷作用下的疲劳寿命。
Based on the CAE technology, the fatigue life prediction under multi-axial loading of 13 square concrete mixer＇s sub-frame has been studied. In order to predict the fatigue life of frame structure, the method based on multi-body dynamics and finite element has been adopted. Established the finite element rrmdel of sub-frame and made statics analysis in ANSYS. Mode a research of the dynamic responding state existed in the vehicle on B random road susace, and extracted of leaf spring and frame connection load. According to fatigue property data and fatigue damage model based on FE-Safe software and found out the parts of stress concentration and fatigue failure, then got the result of fatigue analysis. The analysis results with the road test results show that, the methad proposed can effectively predict the fatigue of vehicle key components under the non- proportional loadings at early design.
出处
《机械设计与制造》
北大核心
2015年第6期211-214,共4页
Machinery Design & Manufacture
关键词
有限元
副车架
多体动力学
多轴疲劳
Finite Element Analysis
Sub-Frame
Multi-Body Dynamics
Multi Axial Fatigue
