基于复杂振动载荷的高速列车齿轮箱体强度分析

Strength Analysis of High-Speed Gearbox Based on Complex Vibration Load

针对现有研究高速列车齿轮箱体仅考虑了电机扭矩载荷或简化振动工况的现状,以国内某车型高速列车齿轮箱体为研究对象,通过对轴悬式齿轮箱体载荷工况进行分析,基于振动载荷确定齿轮箱体强度计算时的所有工况组合,利用有限元软件对高速列车齿轮箱体进行强度分析,并根据相关铁路标准对结果进行评定。结果表明,齿轮箱体在设计寿命周期内,可同时承受牵引/制动工况下的扭矩载荷及线路激扰产生的振动载荷,应力幅值均小于其对应许用应力幅,齿轮箱体的疲劳强度满足许用要求。在齿轮箱体强度分析时对复杂工况组合进行计算,保证了齿轮箱体设计的可靠性,为高速列车齿轮箱体强度分析和评定提供了一种新方法。

Due to the current situation where research on high-speed gearbox only considers motor torque load or simplified vibration conditions.In this paper,a domestic high-speed gearbox was studied.Through the analysis of the load condition of axle suspended gearbox,the load cases are determined for strength calculation of gearbox based on vibration load.By using finite element software,the strength analysis for the box body of certain rail gearbox is analyzed,and the results are evaluated according to the relevant railway standards.The results indicate that the gearbox can withstand both the torque load under traction/braking conditions and the vibration load generated by line excitation during the designed life cycle.The stress amplitude is smaller than the promised stress amplitude.Thus,the fatigue strength of the box meets the allowable requirements.In this study,all working conditions were calculated during the strength analysis of the gearbox,which ensured the reliability of the gearbox design and provided a method for the strength analysis and evaluation of the gearbox of urban rail and high-speed rail.