Influence of Pier Settlement on Dynamic Performance of High-speed Maglev Train

The pier settlement leads to the irregularity of highspeed maglev track, which affects the safety and stability of train operation. It is very important to set the safety threshold of pier settlement reasonably and accurately. In this paper, the dynamic model of high-speed maglev train/track interaction system is established. The total response of track beam is divided into static response caused by pier settlement and dynamic response caused by vibration of elastically beam, so a track beam model composed of dynamic displacement model and static displacement model is established. The dynamic performance of the train/track coupling system is evaluated under the conditions of different settlement values and number of settlement piers, and the safety threshold of pier settlement is analyzed from the perspective of passenger comfort and running stability of the train. The results show that the safety threshold of pier settlement is about 16mm for the maglev train with a speed of 400km/h.