摘要
随着列车的提速和 5 0 0 0t重载列车的开行 ,直线轨道钢轨出现了交替的不均匀侧磨 ,使得列车运行品质下降。钢轨侧磨速率的大小主要决定于轮轨之间的冲击角和导向力的大小。在直线轨道上由于轮对的蛇行运动导致了轮缘与钢轨侧面接触 ,造成钢轨侧面的交替侧磨。本文运用车辆动力学理论对这一问题进行研究 ,利用轨面的不平顺激扰函数 ,对车辆在直线轨道上运行进行仿真计算 ,得出车体、转向架及轮对产生蛇行运动的时程函数 ,并对时程函数进行频谱分析 ,得出钢轨交替侧磨的波长与轨道几何不平顺的波长无关 ,而只与车辆轮对及转向架的蛇行频率有关的结论。文章根据现场的情况 ,对引起钢轨交替侧磨的一些因素进行分析 。
With the speed rising and the 5 000t heavy haul train running,the alternating side wear of rail occurs on tangent and the running quality of train descends.The magnitude of the side wear rate of rail is determined by that of the attack angle and the guiding force between wheel and rail.The hunting of the wheelset running on tangent results in wheel flange contacting the rail gauge side.Thus causing an alternating side wear of rail.This paper uses the vehicle dynamics to analyze this problem.The irregularity of the rail surface as an input exciting function is used to do computer simulation of the vehicle running on tangent.The time domain functions of the hunting of car body,bogie and wheelset are obtained,and the frequency of the results is calculated with spectrum analysis.The result is that the wave length of the alternating side wear is not affected by irregularity,but it is determined by the hunting frequency of the bogie and wheelset of the vehicle.According to the alternating side wear of rail,the factors that cause the alternating side wear of rail are discussed,and some measures of reducing the alternating side wear of rail are put forward.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2001年第2期107-112,共6页
China Railway Science
基金
教育部<高等学校骨干教师资助计划>资助
关键词
钢轨侧磨
直线轨道
仿真计算
成因
铁路
Railway track
Side wear of rail
Straight track
Computer simulation
