基础刚度突变对双块式无砟轨道振动的影响

为了研究基础刚度突变对双块式无砟轨道垂向振动的影响,运用通用有限元软件ANSYS建立了双块式无砟轨道垂向动力学有限元模型.分析了模拟列车荷载通过5种不同基础刚度比时,无砟轨道结构的垂向振动响应.结果表明:基础刚度突变和列车行车速度对无砟轨道结构垂向振动的影响十分显著,为了保证列车平稳运行和减缓轨道结构的破坏,需在基础刚度突变处设置过渡段.

Effects of the Abrupt Change of Foundation Stiffness on Vibration of Double-block Ballastless Track

For the purpose of researching effect of sharp change of stiffness on vertical vibration of ballastless track ,finite element software ANSYS is used to establish dynamic model for double-block ballastless track .Verti-cal vibration was analyzed when a train was passing through five kinds of tracks with different stiffness .The result shows that the sharp change of stiffness and train speed have great impact on vertical vibration .So in order to keep train running steadily and avoid damage to track , transient section should be setup .