摘要
根据轨道结构的特点 ,建立了横向振动简化模型 ,以分析轨道结构的横向刚度对轮轨横向作用力和钢轨横向振动的影响。从计算结果可知 ,轨道结构的横向振动频率较低 ,且钢轨与轨枕的横向振动主频相接近。道床刚度对轨道的横向振动影响较大 ,从理论上分析了钢轨和轨枕的动力响应与轨道横向刚度之间的关系。最后建议提高轨道的平顺性 ,降低轨道结构的横向振动以适应快速列车的行车要求。
Acording to the characteristic of railway track, this paper established a simple lateral track model to analyses how the lateral stiffness to affect the lateral force and vibration acting on the components of track. From the calculating results, the main frequency of rail and sleeper lateral vibration is low. The lateral stiffness of ballast affects the lateral vibration greatly. This paper analyses theoretically the dynamic response of rail and sleeper vibration under different stiffness. Finally, This paper suggests that we should improve the smoothness of track geometry, and descend the lateral track vibration to meet the need of raising the speed of train.
