车轮谐波磨耗对轮轨垂向力及车辆稳定性的影响

来源期刊:中南大学学报(自然科学版)2020年第7期

论文作者:谢建平 陈治亚 潘瑛 谢建波 王乾宇

文章页码:2013 - 2021

关键词:车轮谐波磨耗;车辆/轨道耦合模型;单一激扰;叠加激扰;轮轨垂向力;车辆稳定性

Key words:wheel harmonic wear; vehicle/track coupling model; single excitation; superposition excitation; wheel-rail vertical force; vehicle stability

摘    要:基于车辆车轮在生产过程中存在质量偏心或几何偏心,导致列车在运行一段时间之后出现车轮谐波磨耗现象,车轮谐波磨耗将对轮轨垂向力及车辆稳定性产生严重影响,以国内某地铁车辆为参考,运用车辆轨道耦合模型理论,采用Fourier级数模拟2阶、3阶车轮谐波磨耗,建立该车的车辆/轨道耦合模型及车轮谐波磨耗模型。仿真计算车轮谐波磨耗及轨道不平顺激扰等因素对轮轨垂向力及车辆稳定性的影响,并分析车辆在单一激扰工况和叠加激扰工况下车辆动力学参数的差异。研究结果表明:速度对轮轨垂向力的影响远大于幅值和相位差对轮轨垂向力的影响,轨道不平顺激扰对轮轨垂向力的影响不大;随着速度增大,车轮谐波磨耗对车辆运行平稳性影响越显著。

Abstract: Considering that in the production process of vehicle wheels,there are mass eccentricity or geometric eccentricity, the harmonic wear of wheels occurs after the train runs for a period, wheel harmonic wear seriously affects wheel-rail vertical force and vehicle stability, a subway vehicle in China was taken as a reference, the theory of vehicle-track coupling model and Fourier series were used to simulate the 2nd and 3rd order wheel harmonic wear,and the vehicle-track coupling model and wheel harmonic wear model of the vehicle were established.The effects of wheel harmonic wear and track irregularity excitation on wheel-rail vertical force and vehicle stability were simulated and calculated. The difference of vehicle dynamic parameters between single excitation and superposition excitation conditions was analyzed.The results show that the influence of velocity on wheel-rail vertical force is much greater than that of the amplitude and phase difference.Track irregularity excitation has little effect on wheel-rail vertical force. With the increase of speed, the wheel harmonic wear irregularity excitation has significant impact on vehicle running smoothness.

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