摘要
为研究米轨机车车轮多边形化对机车系统动力学性能的影响,建立米轨机车动力学模型,研究车轮多边形的谐波阶数和波深幅值对动力学性能的影响,并计算不同谐波阶数下车轮多边形的波深限值,最后对车轮多边形和轨道激励共同作用下轮轨垂向力的变化趋势进行分析。结果表明:由于米轨机车运行速度较低,车轮多边形化会导致低频振动,使得车体振动响应增大;车轮多边形化会极大地增加轮轨垂向力,但对脱轨系数影响不大;波深限值与机车运行速度及车轮多边形谐波阶数成反比;轨道激励不仅不会掩盖多边形的作用趋势,而且会极大地增加轮轨垂向力。机车在线路上运行时应经常检测车轮不圆度,并及时镟修或者更换车轮,防止出现轮轨垂向力过大或跳轨现象。
In order to study the influence of the polygon wheel of meter-gauge locomotive on the dynamic performance of the vehicle system,a dynamic model of meter-gauge locomotive was established.The influence of harmonic order and the amplitude of the wave depth of the polygon wheel on the dynamic performance were calculated.The wave depth limit of the locomotive was studied at different harmonic order.At last,the change trend of wheel-rail vertical forces was studied under the joint action of polygon wheel and track excitation.The results showed that due to the low running speed of the meter-gauge locomotive,the polygon wheel will form low frequency vibration which will increase the vibration response of the car body;the polygon wheel will greatly increase the wheel-rail vertical forces,but it has little effect on the derailment coefficient;the wave depth limit is inversely proportional to the running speed of the locomotive and the harmonic order;the track excitation will not cover the trend caused by polygon wheel,but it will greatly increase the wheel-rail vertical forces.Therefore,it’s necessary to detect the wheel out of roundness frequently when the locomotive is running on rail,and lathing or replacing wheel in time in order to prevent the wheel-rail vertical forces is too large or the jumping of wheels.
作者
胡静涛
杨九河
丁军君
李朝曦
李芾
HU Jingtao;YANG Jiuhe;DING Junjun;LI Zhaoxi;LI Fu(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;China Railway Chengdu Group Co.,Ltd.,Chengdu,Sichuan 610082,China)
出处
《机车电传动》
北大核心
2019年第2期44-48,共5页
Electric Drive for Locomotives
基金
中央高校基本科研业务费专项资金资助项目(2682016CX029)
四川省青年科技创新研究团队项目(2017TD0017)
关键词
车轮多边形
米轨机车
动力学性能
谐波阶数
波深
polygon wheel
meter-gauge locomotive
dynamic performance
harmonic order
wave depth
