• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (15): 191-197.doi: 10.3901/JME.2020.15.191

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Application of Nonlinear Energy Sink for Rotor System Vibration Suppression

YAO Hongliang, CAO Yanbo, ZHANG Qin, WEN Bangchun   

  1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819
  • Received:2019-10-08 Revised:2020-04-03 Online:2020-08-05 Published:2020-10-19

Abstract: To satisfy the requirement for vibration suppression device with simple structure and wide effective vibration suppression frequency range, a nonlinear energy sink (NES) with piecewise linear stiffness for rotating machinery is presented. Firstly, the structure and vibration suppression mechanism of the NES is proposed. Then, the stiffness and damping characteristics of the NES are analyzed and the dynamic model of the rotor system with the NES is built. The dynamics of the isotropic and anisotropic rotor system with the NES is numerically studied and the wide band frequency vibration suppression effectiveness is analyzed. The results show that the NES is effective both for the isotropic rotor system and the anisotropic rotor system. The vibration suppression can reach 68% in simulation and 67% in experiment.

Key words: rotor system, nonlinear energy sink, vibration suppression, piecewise linear stiffness

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