Effect of long-wave deviation of stator plane on high-speed maglev train and guideway system

Abstract

Pre-stressed concrete hybrid guideways are often used in the high-speed maglev transit system. The long-wave deviations of the stator plane based on the initial pre-camber could be possibly caused by temperature and concrete creep. When the high-speed maglev train moves over the guideways system, significant vehicular vibration could be triggered by the long-wave deviations. In the present study, the influence of the long-wave deviations on the dynamic characteristics of high-speed maglev train is investigated. First, the vertical analysis model of the coupled maglev train-guideway system is presented, and the loading model of long wave deviations of the stator plane is determined. Then, the effect of several key parameters, that is, initial pre-camber, the long wave deviations levels, train speeds, and the bridge span, on the dynamic response of maglev train-guideway system is evaluated. The results show that the initial pre-camber will improve the driving safety index and riding comfort level, especially for the middle vehicle of the high-speed maglev train. The results also indicate that the existence of long-wave deviation on the stator plane could deteriorate the driving safety and comfort level of the vehicle. Meanwhile, higher train speed and long-wave deviations levels as well as larger bridge span result in larger vehicle dynamic response.