【作者】 李国强； 杜爱民； 邵建旺；

【Author】 Li Guoqiang;Du Aimin;Shao Jianwang;Automotive College of Tongji University;

【机构】 同济大学汽车学院；

【摘要】 本文在对4G10汽油机曲轴进行模态分析和多柔体动力学分析基础上对曲轴的疲劳寿命进行了计算。通过对曲轴进行模态分析和对曲轴系的刚-柔混合模型进行动力学分析,得到了包含曲轴模态及应力信息的结果文件和计算曲轴疲劳寿命所需要的应力-时间历程曲线。然后在MSC.FATIGUE中建立起曲轴的疲劳分析模型,分别对增压前后的曲轴进行疲劳强度分析,找出了曲轴工作时的危险部位,之后又对影响曲轴疲劳强度的相关工艺进行了比较,为曲轴的改进设计提供了依据。更多还原

【Abstract】 The paper calculated the fatigue life of 4G10 gasoline crankshaft,based on the modal analysis and multi-flexible body dynamics analysis.The result file containing the modal and stress information of crankshaft and the curve of stress-time course for the calculation of the fatigue life analysis of crankshaft were obtained by the modal analysis and the dynamics analysis of the rigid-flexible mixed model of crankshaft.Then the model for fatigue analysis of crankshaft was built in MSC.FATIGUE.The most weakness places were found by analyzing the fatigue life of crankshaft in the supercharged condition or not.The different technics of affecting the fatigue life of crankshaft was also compared to offer the references for the optimization design of crankshaft.更多还原