地铁小半径曲线钢轨波磨影响因素分析

针对地铁线路普遍存在的钢轨磨耗现象,从轮轨蠕滑力和磨耗功率的角度研究地铁小半径曲线钢轨波磨问题,并利用多体动力学软件SIMPACK建立车辆-轨道动力学耦合模型对地铁曲线地段上车辆运行速度和曲线半径对轮轨磨耗的影响进行动力仿真计算和分析。分析计算结果表明:车辆运营速度不宜过低,为降低轮轨磨耗、保证行车安全及运力需求,最高运营速度定为60～70 km/h为宜;曲线半径对钢轨磨耗功率影响较大,在符合城市规划等决定因素的要求下地铁线路曲线半径尽量大于500 m,可以实现良好的运行效果。

Analysis of Influence Factors in Rail Corrugation on Sharp Curve of Metro

Considering the widespread phenomena of rail corrugation on metro lines,the analysis were carried out from the viewpoints of both wheel-rail creep forces and wear power so as to study the problem of rail corrugation on sharp curve of metro.Vehicle-track dynamic coupling model was established by using multi-body system dynamics software SIMPACK,and the influences on wheel-rail corrugation caused by the vehicle speed and by the curve radius of curve of metro were calculated and analyzed by means of dynamic simulation.Analysis results based on the dynamic model in this article show that: the vehicle speed should not be too slow,therefore to reduce the wheel-rail corrugation and to ensure both running safety and transport capacity,it is advisable to have a maximum speed of 60⁷0 km/h.Furthermore,the wear power is seriously influenced by the curve radius,so under the premise of meeting those requirements of decisive factors such as the urban planning,the curve radius should be larger than 500m as far as possible,so that a good running state can be achieved.