高速磁浮车-轨耦合系统动态机理与振动响应

Dynamic Mechanism and Vibration Response of High-speed Maglev Vehicle-guideway Coupling System

摘要:

对高速磁浮车-轨耦合系统进行动态机理和振动响应研究。首先，对高速磁浮中的各类耦合关系进行建模；其次，分别分析了动态和静态条件下的车-轨耦合作用机理；然后，建立了高速磁浮车-轨耦合动力学有限元模型；最后，对磁浮列车高速通过桥梁时轨道梁、功能件的动力响应和车-轨共振速度进行分析。结果表明：高速运行时车-轨作用频率不同，长时间共振速度下运行时车-轨振动明显增大；若桥梁动力放大系数小于1.2，则基频比最小值为1.16；若桥梁动力放大系数小于1.3，则基频比最小值为1.04。

Abstract:

The dynamic mechanism and vibration response of a high-speed maglev vehicle-guideway coupling system were studied. Firstly， various coupling relationships in high-speed maglev systems were modeled. Next， the vehicle-guideway coupling mechanisms under dynamic and static conditions were analyzed respectively. Then， the finite element model of high-speed maglev vehicle-guideway coupling dynamics was established. Finally， the dynamic response of the guideway beam and the functional components along with the vehicle-guideway resonance speed was analyzed when the maglev train passed the bridge at high speed. The results show that the vehicle-guideway interaction frequency changes with running speed， and the vehicle-guideway vibration increases significantly at resonance speeds for a long time. If the dynamic amplification factor is less than 1.2， the minimum base frequency ratio is 1.16. If the dynamic amplification factor is less than 1.3， the minimum base frequency ratio is 1.04.