磁浮列车-桥梁耦合自激振动机理分析与仿真验证

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Abstract As the train is suspended above the guideway in static state, the electromagnets of the maglev, together with the guideway, tend to vibrate in vertical direction, and this phenomenon is called maglev vehicle-guideway coupled self-excited vibration. So far, the research of this problem has not been perfect and the principle of the self-excited vibration has not yet been well studied; and in practice, the vehicle-guideway coupled self-excited vibration problem has not been solved, either. In order to master the problems, the underlying principles of the self-excited vibration are analyzed in three aspects. First of all, a simplified interaction model containing a flexible bridge and a single levitation unit is presented. Then, based on the minimum interaction model, the principle of the self-excited vibration from the energy transmission is explored. It shows that the active property in specific frequency band of the levitation system is the root of self-excited vibration. Secondly, the bridge subsystem is regarded as the forward channel, while the levitation subsystem is viewed as the feedback channel of the coupled system, and the underlying principle of the self-excited vibration from the characteristic polynomial of the coupled system is listed. Finally, the stability criterion is used to analyze the basis of self-excited vibration according to the open-loop transfer function of the system. In summary， four conclusions are obtained, which may provide theoretical references for the understanding and settling of stationary self-excited vibration problems of maglev. At last, based on the built overall dynamic model with details, numerical simulations are carried out and the results verify the correctness of conclusions.

Received: 07 November 2016 Published: 15 September 2017

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	Articles by authors
	WANG Lianchun1
	LI Jinhui1
	2
	ZHOU Danfeng1
	LI Jie1

Cite this article:

WANG Lianchun1,LI Jinhui1,2, et al. Principle Analysis and Simulation Verification on Maglev Vehicle-Bridge Coupled Self-Excited Vibration Problem[J]. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(18): 13-19.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2017/V36/I18/13

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