【摘要】 以某直列6缸柴油机曲轴为研究对象,通过动力学非线性分析的方法对该轴进行了耐久性的研究。首先建立了曲轴等部件的三维有限元模型,采用子结构技术,对有限元模型进行模态压缩,然后运用AVL的动力分析模块EXCITE进行动力学非线性仿真,得到一个工作循环曲轴的瞬态应力分布状况,并进行疲劳强度安全系数计算。更多还原

【Abstract】 This paper describes the technique used for simulating dynamically the crankshaft of an in-line 8 cylinder engine as to predicting its durability.To perform the nonlinear dynamics analysis,a FEM model of crank train was created firstly,wihich is very large and necessary to create a master-degree-of-freedom set by FE software.Then the program was carried out by using the EXCITE from AVL and the transient stresses of the crankshaft was given.A further study on the safety factors calculation of fatigue strength was described also.更多还原