基于多体动力学的曲轴疲劳强度分析  

Crankshaft Fatigue Strength Analysis Based on Many-Body Dynamics

作　　者：廖吉华 程仁庆 黄伟[2] 王永康[2] 阮晓芳[2] 

机构地区：[1]广西柳工机械股份有限公司,广西柳州545007 [2]广西大学机械工程学院,广西南宁530004

出　　处：《机电工程技术》2016年第11期31-35,共5页Mechanical & Electrical Engineering Technology

基　　金：国家科技支撑计划课题(编号:2012BAF02B02);广西科学研究与技术开发计划项目(编号:桂科能10100026)

摘　　要：以某六缸柴油机曲轴为研究对象,运用多体动力学和有限元相结合的方法对其进行疲劳强度计算。首先建立曲柄连杆机构多刚体动力学模型,进行动态仿真分析,获得曲轴有限元分析的载荷边界条件,然后建立能模拟曲轴与轴承间接触状态的有限元模型,对曲轴危险工况进行接触有限元分析,最后校核了曲轴的疲劳强度。计算结果表明,分析方法合理,所研究曲轴的疲劳强度满足设计和运行工况要求,同时,该计算方法能够较真实地模拟曲轴的实际工作状况,可为曲轴的强度计算提供一定的参考依据。Muhi-body dynamics and finite element method was used to make the fatigue strength analysis of a six-cylinder crankshaft. In order to gain the boundary conditions for finite element analysis of crankshaft, the dynamic simulation was carried out in the multi body dynamic model. Then the finite element model of the crankshaft and bearing assembly was established and the contact finite element analysis was carried out in dangerous condition. At last, the fatigue strength of crankshaft was checked. Analysis results show that the fatigue strength of crankshaft can meet the requirements, and the method simulates the actual working condition of crankshaft authentically, providing reference basis for the calculation of fatigue strength of crankshaft.

关 键 词：曲轴 疲劳强度 多体动力学 接触有限元分析 

分 类 号：TP391.77[自动化与计算机技术—计算机应用技术]