跨座式列车与预应力混凝土轨道梁动力特性分析

Dynamic Characteristic Analysis of Straddle-type Monorail Train and Pre-stressed Concrete Beam

为研究跨座式单轨列车与预应力混凝土轨道梁的动力特性,建立了列车-轨道梁空间耦合振动模型.车辆运动微分方程由拉格朗日方程导出,轨道梁用模态综合法建立其运动微分方程.计算了不同车速下车辆和轨道梁的动力响应.结果表明:车速对轨道梁挠度的影响较小,但对加速度影响较大;在计算车速下,轨道梁具有良好的动力特性,列车能安全舒适地通过此轨道梁.

A coupled vibration model is established to study the interaction dynamic characteristics between straddle-type monorail train and pre-stressed concrete（PC）beam.Vehicle＆#39;s differential e-quations are derived by using Lagrange formulation.The PC beam＆#39;s differential equations are de-rived by using modal synthesis method.The dynamic responses of the coupled system are studied at different running velocities.The results show that the effects of the train velocity on the deflec-tions of the beam are less than the accelerations.The beam has well dynamic characteristics and the train can safely and comfortably go through with the computed speed.