基于ANSYS的发动机曲轴有限元静力与模态分析

Finite Element Static and Modal Analysis of Engine Crankshaft Based on ANSYS

本文对某V10发动机曲轴进行有限元分析,并运用Solid Works软件构建了曲轴模型,应用ANSYS Workbench软件模拟分析了曲轴在各气缸发火做功时的静态力学性能以及曲轴的振动特性,得出曲轴在模拟工况下的应变、应力分布情况,并得出曲轴的自由振动模态与在约束情况下的振动模态。计算结果表明,曲柄连杆轴颈的过渡圆角与主轴颈的过渡圆角位置是危险区域,最终得到该曲轴的最小固有频率,为该曲轴的可靠性分析、疲劳强度校核提供计算基础。

In this paper,a finite element analysis of a V10 engine crankshaft was carried out,and a crankshaft model was constructed by using Solid Works software,and the ANSYS Workbench software was used to simulate and ana⁃lyze the static mechanical properties of the crankshaft when each cylinder was firing and doing work and the vibration characteristics of the crankshaft,and the strain and stress distribution of the crankshaft under the simulated operating conditions were obtained,and the free vibration mode of the crankshaft and the vibration mode under restraint were obtained.The calculation results show that the transition fillet of the crank connecting rod journal and the transition fillet of the main journal are dangerous areas,finally,the minimum natural frequency of the crankshaft is obtained,which provides a calculation basis for the reliability analysis and fatigue strength check of the crankshaft.