基于实际载荷谱的电动汽车减速器齿轮疲劳寿命分析

Fatigue Life Analysis of Electric Vehicle Reducer Gears Based on Actual Load Spectrum

针对电动汽车减速器齿轮疲劳寿命研究存在加载信号简单、难以反映实际行驶中的真实受载问题,提出了一种以实际行驶载荷谱为输入的电动汽车减速器齿轮疲劳寿命分析方法。制定减速器试验场实际行驶载荷谱采集方案,组建测试系统,采集了电动汽车减速器实际行驶载荷谱;在此基础上,建立了电动汽车减速器刚-柔耦合系统动力学模型,并进行了运动学和动力学验证;以采集的实际行驶载荷谱为输入,提取齿轮啮合力,结合有限元分析模型,对减速器齿轮损伤和寿命进行了分析。结果表明,基于实际载荷谱的电动汽车减速器齿轮疲劳寿命分析更加符合真实情况。

Aiming at the problem that the loading signal is simple and is difficult to reflect the real load in actual driving,a fatigue life analysis method of electric vehicle reducer gear based on the actual driving load spectrum is proposed.An actual driving load spectrum collection scheme of the reducer test site is formulated,and a test system is established to collect the actual driving load spectrum of the electric vehicle reducer;on this basis,a dynamic model of the rigid flexible coupling system of the electric vehicle reducer is established,and the kinematics and dynamics are verified;with the collected actual driving load spectrum as input,the dy⁃namic simulation analysis of the reducer system is carried out,and the gear meshing force is extracted.Com⁃bined with the finite element analysis model,the damage and life of the reducer gear are analyzed.The results show that the fatigue life analysis of electric vehicle reducer gears based on the actual load spectrum is more in line with the actual situation.