用简化模型分析轮轨系统横向动力响应

COMPARISON INVESTIGATION ON WHEEL/RAIL INTERACTION BY CHANGING THE LATERAL STIFFNESS OF THE CURVED TRACK

根据轨道结构轮轨相互作用特点 ,建立了冲击荷载作用下轨道结构横向振动简化模型。在一系列假定的基础上 ,利用 MATL AB的 Simulink○R语言编制轮轨动力作用程序 ,通过改变钢轨扣件横向刚度和道床横向刚度 ,观察其对轮轨系统横向振动特性及钢轨磨损的影响。结果表明 :对曲线地段轨道结构横向刚度进行合理取值 。

According to the characteristic of wheel/rail interaction in the railway tracks, this papaer establishes a simple lateral track model under lateral shock force. Based on a series of hypothesis, the program of wheel/rail dynamic interaction has been worked out depending on MATLAB Simulink ○R . The dynamic effect of the rail fastener as well as the ballast lateral stiffness on the transverse vibration characteristics of wheel/rail system and rail wears on curved track are investigated as they have been varied. The results show that the wheel/rail interaction would be improved and rail wears could be alleviated through selecting rational parameter of curved track.