发动机曲轴的预负载计算模态分析法  

The method of computational model analysis for pre-stressed engine crankshaft

作　　者：刘加光[1] 陈义保[1] 罗震[2] 

机构地区：[1]烟台大学机电汽车工程学院,山东烟台264005 [2]华中科技大学机械学院,湖北武汉430074

出　　处：《山东理工大学学报（自然科学版）》2006年第5期26-29,共4页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(50465001)

摘　　要：曲轴作为柴油发动机的重要零部件,其静强度和动力学特性对发动机整体的使用寿命有着直接的和重要的影响.本文利用计算机辅助工程分析方法,对某型坦克柴油发动机的曲轴分别进行了考虑预应力作用的计算模态分析.采用考虑预负载的Lanczos修正法进行发动机曲轴的固有特性的计算,得出曲轴有限元模型的前20阶固有振动频率及其相应固有振型.同时,结合计算结果,分析了不同阶次固有特性对曲轴性能的影响情况,结果表明了EFGM算法的正确性和有效性.Crankshaft is a very important part in diesel engine,its static strength and dynamic speciality have an important effect on the service of engine.In this paper,computer aided engineering analysis method is used.The computational modal analysis of the crankshaft of a tank diesel engine is performed considering the pre-stress.Lanczos revision method is used to compute the inherence speciality of the crankshaft of the engine.Accordingly,the front twenty ranks inherence vibration frequency and its corresponsive inherence vibration model of finite element model of crankshaft is determined.Lastly,a typical example is performed to substantiate the validity of the computation method.

关 键 词：发动机曲轴 计算机辅助工程 有限元法 模态分析 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]