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

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.

Key words:high-speed maglev;vehicle-guideway interaction;dynamic mechanism;coupling vibration;amplification factor