高速道岔辙叉区动力响应仿真分析

通过建立列车过岔有限元模型,运用动力学原理,研究移动荷载作用不同轨下刚度和列车速度在道岔辙叉区对轨道振动特性的影响。分析了心轨尖端、心轨根端及辙叉区共用垫板中心等特殊部位处的轨道振动特性。计算表明列车速度的变化对钢轨最大竖向加速度和岔枕最大竖向加速度的影响较大,而辙叉区轨下刚度的变化对钢轨最大竖向加速度、岔枕最大竖向位移及岔枕最大竖向加速度有较大的影响。

Dynamic Analysis on Sharing Pads of High-speed Turnout

The effect of track stiffness and velocity of vehicle on track dynamic characteristics of frog system under moving loads have been investigated by finite element computational model according to the theory of dynamics. The rail dynamic characteristics of the beginning part of the point rail, the ending part of the point rail and the medium part of sharing pads have been analyzed as the special parts. The computations show that the change of vehicle velocity has greater influences on track vertical acceleration. Also, the change of track stiffness of frog system has greater influences on track vertical acceleration and the vertical displacement of cross tie.