摘要
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.
出处
《兰州交通大学学报》
CAS
2014年第4期56-60,共5页
Journal of Lanzhou Jiaotong University
基金
国家自然科学基金民航联合基金(U1333133)
关键词
跨座式单轨交通
车辆-轨道梁耦合振动
动力特性
straddle-type monorail transportation
coupled vibration system of vehicle and beam
dynamic characteristic
