小半径曲线上动车组运行安全性仿真研究

Simulation Research on Operation Safety of EMU Negotiating Small Radius Curve

采用多体动力学仿真分析软件UM建立CRH5型动车组的动力学仿真模型,仿真分析动车组通过小半径曲线线路时曲线半径、曲线超高、钢轨类型、曲线轨距加宽和轨底坡等线路参数对动车组运行安全性的影响。结果表明:曲线半径的影响最大,钢轨类型、曲线超高、轨距加宽以及轨底坡的影响均较小。为增加动车组通过小半径曲线的安全冗余,减少外轨侧磨,建议在有条件的情况下尽量增大曲线半径;为避免曲线超高引起直曲过渡段处受到更大的轮轨冲击作用,建议对半径为250m的曲线线路不设置曲线超高,而且对应的曲线轨距加宽值宜设为10mm。

The dynamic simulation model of CRH5 EMU was established by the application of multi-body dynamics software UM.The influence of such line parameters as curve radius,curve superelevation,rail type,curve gauge widening and rail base slope on the operation safety of EMU negotiating curved track with small radius was simulated and analyzed.Results show that the effect of curve radius is the biggest.The influence of rail type,curve superelevation,gauge widening and rail base slope on EMU running safety is very small.In order to increase the safety redundancy of EMU negotiating small radius curve and reduce the side wear of high rail,it is suggested that the curve radius should be enlarged as possible.In order to avoid greater wheel-rail impact on straight and curved track transition section by curve superelevation,it is suggested that,for the curved track with the radius of 250 m,no curve superelevation should be set and the corresponding gauge widening value should be set as 10 mm.