8L265柴油机曲轴的疲劳分析及结构优化  

Fatigue Strength Analysis and Structure Optimization on 8L265 Diesel Engine Crankshaft

作　　者：肖森[1] 于学兵[1] 陈小雷[1] 

机构地区：[1]大连理工大学内燃机研究所,辽宁省大连市116023

出　　处：《农业装备与车辆工程》2015年第8期34-37,42,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：以8L265柴油机的曲轴为研究对象,运用Pro/E软件对曲轴的整体进行了符合实际情况的建模,然后导入到有限元分析软件ANSYS-Workbench中对其进行有限元分析,研究了整体曲轴的变形情况及应力分布情况,并对交变载荷作用下的曲轴进行了疲劳强度校核。以曲轴的单拐模型为研究对象研究了轴颈过渡圆角处半径,轴颈过渡圆角形状等结构参数对应力集中效应的影响。最后对曲轴整体进行了振动模态分析,分析了曲轴的自由模态振动,为以后的动力学分析打下良好的基础。In this paper,the crankshaft of 8L265 diesel engine was used as research object.First a 3-D model corresponding to practical conditions was set up by using Pro / E.And then it was imported into ANSYS-Workbench and analyzed.The state of deformation and stress of the whole crankshaft was researched.The fatigue strength of the crankshaft was checked under alternating loads.At the same time,the single throw model of the crankshaft was used as research object,the influence of structure parameters on the stress concentration was studied such as the radius of the journal transition fillet,the shape of the journal transition fillet and so on.Finally the dynamic analysis was discussed.During the analysis,the whole crankshaft was used as the target,and the vibration modal analysis was made.The results indicate the natural frequency and deformation of the crankshaft,and lay a good foundation for dynamic analysis.

关 键 词：曲轴 有限元 疲劳分析 优化 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]