Abstract: The numerical model of the floating slab track (FST) lateral movement was established. Considering the torsional deformation of rail, the transverse displacement response as well as rail fasteners and steel spring supported force of rail head and FST excited by harmonic force were obtained. The results of numerical model were in agreement with the one obtained from the finite element model in ANSYS. Based on the harmonic response analysis to the numerical model under the different exciting force and the different supporting condition, the lateral movement status of the rail and EST in 0～500Hz frequency band were obtained.

Key words: vibration and wave, lateral vibration, floating slab track, numerical analysis, harmonic response

摘要： 建立浮置板轨道横向运动的数值模型，并考虑钢轨的扭转变形，得到钢轨轨头部以及浮置板在谐振作用下的横向位移响应以及钢轨扣件、钢弹簧的支承力。同时在ANSYS中建立浮置板轨道的有限元模型，与数值模型相对比，得到的结果相吻合。对数值模型在不同激励力和不同的支承条件下进行谐响应分析，得到钢轨和浮置板在0-500Hz频段内的横向运动状态。

关键词: 振动与波, 横向振动, 浮置板轨道, 数值分析, 谐响应