轻轨线路曲线半径对车轮磨耗的影响

Influence of curve radius on wheel wear in light rail

为分析线路曲线半径对轻轨列车车轮磨耗的影响,以长春市轻轨3号线70%低地板轻轨列车车轮为研究对象,建立独立旋转轮对的轻轨车辆-轨道耦合动力学计算模型、轮轨接触模型和Archard材料磨耗模型,对轻轨列车车轮磨耗进行仿真分析。计算结果表明:轻轨列车通过半径为50 m的曲线时,圆曲线上的车轮磨耗比缓和曲线更严重,整体轮对比独立轮对磨耗更严重;曲线半径大于150 m时,内、外侧车轮磨耗随着曲线半径增大而减小,并且在曲线半径相同的条件下,独立轮对各车轮磨耗量均比整体轮对各车轮磨耗量约大2~3 mm;随着列车行驶里程的增加,车轮磨耗率有先增大后减小的变化趋势,即可以将车轮磨耗分为快速磨耗和稳定磨耗2个阶段。轻轨车辆外侧车轮的磨耗率大于内侧车轮,说明车轮磨耗主要发生在外侧车轮。

To analyze the influence of curve radius on wheel wear of light rail train,the wheel wear of 70%low floor light rail train of Changchun light rail line 3 is studied,and the vehicle-track coupling dynamic calculation model with independent rotating wheelset,wheel-rail contact model and Archard material wear model are established,and then the wheel wear of light rail train is simulated and analyzed.The computing results show that:while the light rail train passes through the 50 m radius curves,the wheel wear on the circular curve is more serious than that on the transition curve,and the wheel wear of the integrated wheelset is more serious than that of the independent wheelset;while the radius of the curve is greater than 150 m,the wear of outside and inside wheel decrease with the radius increasing,and the wear loss of independent wheelset is about 2~3 mm larger than that of integral wheelset when the curve radius is same;with the train mileage increasing,the wheel wear rate increases first and then decreases,that is,the wheel wear can be divided into fast wear stage and stable wear stage.The wear rate of the outside wheel is higher than that of the inside wheel,which indicates that the wheel wear mainly occurs in the outside wheel.