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Shock and Vibration
Volume 2016, Article ID 5231704, 13 pages
Research Article

Dynamic Vibration Absorber with Negative Stiffness for Rotor System

School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China

Received 11 July 2016; Revised 14 October 2016; Accepted 23 October 2016

Academic Editor: Mahmoud Bayat

Copyright © 2016 Hongliang Yao 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.


To suppress the vibration of a rotor system, a vibration absorber combining negative stiffness with positive stiffness together is proposed in this paper. Firstly, the negative stiffness producing mechanism using ring type permanent magnets is presented and the characteristics of the negative stiffness are analyzed. Then, the structure of the absorber is proposed; the principles and nonlinear dynamic characteristics of the absorber-rotor system are studied numerically. Finally, experiments are carried out to verify the numerical conclusions. The results show that the proposed vibration absorber is effective to suppress the vibration of the rotor system, the nonlinearity of the negatives stiffness affects the vibration suppression effect little, and the negative stiffness can broaden the effective vibration control frequency range of the absorber.