铁路曲线上轮轨磨耗影响参数的仿真研究

运用SIMPACK虚拟样机技术,从线路设计及养护维修的角度出发,对铁路曲线上车辆速度、轨底坡、曲线超高及钢轨涂油对轮轨磨耗的影响进行仿真计算和分析。分析结果表明:为降低轮轨磨耗及保证行车安全,车辆速度以比线路条件决定的最高行车速度略低为宜;曲线超高过低或过高均会增大轮轨磨耗,由于小半径曲线上设置的超高一般偏大,故而适当降低小半径曲线的超高对于降低轮轨磨耗是有利的;轨底坡的适当增大可使得轮轨磨耗有一定降低,但效果不明显,且轨底坡过大会加剧轮轨磨耗;对钢轨进行适当的涂油可有效降低轮轨磨耗,但应进行严格控制,涂油太多对于降低轮轨磨耗反而不利。

Simulation Study on Parameters Influencing Wheel/Rail Wear in Railway Curve

With the use of virtual prototyping technology in SIMPACK,and from the viewpoint of track design,maintenance and repair,simulation and analysis have been carried out on the wheel/rail wear caused by vehicle speed,rail cant,superelevation on curve and rail lubrication.Analysis results indicate that in order to reduce the wheel/rail wear and guarantee driving safety,train speed should be slightly lower than the highest speed determined by the track condition.If the superelevation on curve is excessive or inadequate,the wheel/rail wear will be increased.Commonly,the superelevation on small-radius curve is especially large,so decreasing properly the superelevation on small-radius curve can favorably reduce wheel/rail wear.If the rail cant is increased properly,wheel/rail wear will be decreased,but it is not very effective.Furthermore,when rail cant is too large,wheel/rail wear will be increased.Lubricating oil on the rail can effectively lower wheel/rail wear,but excessive lubricating is disadvantageous to wear reduction.