Vibration suppression in high-speed trains with negative stiffness dampers

Xiang Shi , Songye Zhu , Yi-qing Ni , Jianchun Li

Abstract

This work proposes and investigates re-centering negative stiffness dampers (NSDs) for vibration suppression in high-speed trains. The merit of the negative stiffness feature is demonstrated by active controllers on a high-speed train. This merit inspires the replacement of active controllers with re-centering NSDs, which are more reliable and robust than active controllers. The proposed damper design consists of a passive magnetic negative stiffness spring and a semi-active positioning shaft for re-centering function. The former produces negative stiffness control forces, and the latter prevents the amplification of quasi-static spring deflection. Numerical investigations verify that the proposed re-centering NSD can improve ride comfort significantly without amplifying spring deflection.

Key Words

negative stiffness; vibration control; high-speed train; active control; re-centering

Address

Xiang Shi — College of Information and Control Engineering, China University of Petroleum (East China), Qingdao, Shandong Province, China; Department of Civil and Environmental Engineering, National Rail Transit Electrification and Automation Engineering Technology Research Center (Hong Kong Branch), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Songye Zhu and Yi-qing Ni — Department of Civil and Environmental Engineering, National Rail Transit Electrification and Automation Engineering Technology Research Center (Hong Kong Branch), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Jianchun Li — Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, NSW 2007, Australia

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