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Shock and Vibration
Volume 2015, Article ID 896410, 12 pages
Research Article

Dynamics of the Bogie of Maglev Train with Distributed Magnetic Forces

1College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha, Hunan 410073, China
2Beijing Enterprises Holding Maglev Technology Development Co. Ltd., Changsha Branch, Changsha, Hunan 410073, China

Received 3 June 2015; Revised 3 August 2015; Accepted 6 August 2015

Academic Editor: Jeong-Hoi Koo

Copyright © 2015 Yaozong Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A dynamic model of the bogie of maglev train with distributed magnetic forces and four identical levitating controllers is formulated. The vertical, pitching, and rolling degree of freedom of the electromagnet modules and their coupling are considered. The frequency responses of the bogie to track irregularity are investigated with numerical simulation. The results tell us that there are resonances related to the first electromagnetic suspension whose frequencies are determined by the control parameters. A comparative analysis has been carried out between the models with distributed or concentrated magnetic forces. The comparison indicates that simplifying the distributed magnetic force to concentrated one degenerates the dynamic behavior of the maglev bogie, especially resulting in overestimated resonances of the first electromagnetic suspension of maglev trains. The results also indicate that those resonances only occur on specific wavelengths of irregularity that relate to the length of the electromagnets.