现代有轨电车线路轨底坡对槽型轨磨耗的影响

Effect of Rail Cant on Groove-shaped Rail Wear in Modern Tram Line

建立了槽型轨磨耗预测模型,包括考虑了独立旋转车轮的现代有轨电车车辆-轨道耦合动力学计算模型、基于槽型轨多点接触特性的轮轨接触模型以及Archard材料磨耗模型.通过与相关文献结果的对比验证了模型的有效性,并采用该模型分析了轨底坡对现代有轨电车通过小半径曲线轨道时槽型轨磨耗的影响.结果表明:轨底坡为1/60和1/20时,内外侧槽型轨轨面及轨距角位置磨耗相对集中,在X=18 mm附近位置钢轨磨耗影响较轻;相对钢轨磨耗量而言,设置轨底坡为1/20有利于减轻钢轨磨耗.

A rail wear prediction model was established, including a modern trams vehicle-rail coupling dynamics calculation model considering independent rotating wheels, a wheel-rail contact model based on groove-shaped rail multi-point contact characteristics, and an Archard material wear model. The validity of the model was verified by comparing with the relevant literature results and the effect of rail cant on the wear of groove-shaped rail of modern trams when a train passing through small radius curve was analyzed. The results show that when the rail cant is 1/60 and 1/20, the wear on the inner and outer groove-shaped rail surface and rail shoulder is relatively concentrated, and the rail wear near X=18 mm is less affected. In terms of rail’s wear analysis, setting the rail cant at 1/20 is beneficial to reduce rail wear.