摘要
建立地铁车辆-轨道耦合动力学模型,将钢轨视为弹性离散点支撑的无限长Timoshenko梁,将实测钢轨短波波磨不平顺数据作为不平顺激励.通过数值计算得到在科隆蛋扣件线路上不平顺发展过程中车辆动力学响应的变化情况.随着短波波磨不平顺幅值的增大,轮对和转向架的横、垂向加速度以及轮轨横、垂向力均呈增大趋势,且受不平顺程度的影响较大.结果表明钢轨波磨主要影响车辆系统的垂向振动.
A vehicle-track coupling dynamics model of metro vehicle is established, for which the rails are assumed to be infinite Timoshenko beams with the support of elastic discrete points, and the measured shortwave irregularity of rail corrugation is taken as the irregularity excitation. The changes of dynamical vehicle response during the development of irregularity on the track using Cologne-egg fastenings are obtained by numerical calculation. With the increase of shortwave irregularity of rail corrugation, the lateral and vertical accelerations of wheelset and bogie and the lateral and vertical wheel-rail force show an increasing trend and the degree of the irregularity has a significant effect on the performance. The results indicate that the rail corrugation plays an important role on the vertical vibration of vehicle system.
出处
《计算机辅助工程》
2012年第6期26-30,共5页
Computer Aided Engineering
基金
四川省科技支撑计划(2010GZ0226
2011GZ0090)
关键词
车辆-轨道耦合动力学
钢轨波磨
轮对
转向架
轮轨力
vehicle-track coupling dynamics
rail corrugation
wheelset
bogie
wheel-rail force
