车轮退化对HXD3型电力机车动力学性能的影响

Effects of Wheel Degradation on the Dynamics Performance of HXD3 Type Electric Locomotive

摘要: 本文是以HXD3型电力机车为研究对象，根据实测的轮对数据基于随机过程理论揭示不同运行里程下机车轮对退化的演变规律。在此基础上，建立了轮对退化的机车系统动力学模型，分析轮径、轮径差变化对机车动力学性能变化的影响。仿真结果表明：轮径差变化对车辆动力学性能的影响最大，在最大的运行速度120 km/h下，为保障机车运行稳定性，机车安全运行条件下不同里程机车轮径差的工作区间，初始轮径差不能超出7.66 mm，50万里程时轮径差不能超出7.18 mm，100万里程时轮径差不能超出7.21 mm。

Abstract: This paper is based on HXD3 electric locomotive as the research object, according to the experi-ment data of the wheel-set using stochastic process to reveal the evolution of degradation of the wheel under different running mileages. On this basis, the establishment of a locomotive wheel degraded system dynamics model to analyze the impact on the dynamic performance of locomotives when changing wheel diameter and wheel diameter difference. Simulation results show that the wheel diameter difference influences vehicle dynamics parameters mostly. Under the maximum running speed of 120 km/h, the operating of the wheel diameter difference of different mileage locomotives is guaranteed to ensure the stability of locomotive operation; initial wheel diameter difference can’t exceed 7.66 mm, 50-million mileage wheel diameter difference shouldn't exceed 7.18 mm, and 100-million mileage wheel diameter difference can't exceed 7.21 mm.