Research on the Mechanism of Curve Passing for Bogie on a Medium-Low speed Maglev with Mid-Set Air Spring

Abstract

In order to reveal the mechanism of curve passing for medium-low speed maglev, this paper firstly studies the necessary conditions for the conventional wheelset curve passing based on the mechanism of curve passing for the conventional wheelset. Secondly, on the basis of comparing the structure and motion relationship of the conventional wheelset, the theoretical derivation of the magnetic wheelset curve passing conditions are carried out. Finally, the conditions of curve passing for the magnetic wheelset are verified by dynamic simulation. Through the research, it can be found that: 1) The mechanism of curve passing for the magnetic wheelset is different from that of wheelset and independent wheelset. The speed variance and regulating torque are the composite functions of speed, curve radius, track gauge, superelevation, guiding stiffness and yaw angle of the magnetic wheelset. 2) When the magnetic wheelset passes through the curve, its motion posture switches between "?" and "?" ;, while the unilateral magnetic wheel shows a motion which is similar to "hunting". 3) Ignoring the factors such as structure and irregularity, it can conduct that the curve capacity of the magnetic wheelset could be improved by increasing the curve radius, reducing the speed, curve superelevation and gauge to a certain extent. This study theoretically reveals the mechanism of curve passing for the medium-low speed maglev, which provides a certain reference for the subsequent design of the medium-low speed maglev and the improvement of the medium-low speed maglev curve capacity.