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Design and Dynamic Characteristics of a Torsion Isolator With Negative Stiffness Structures

[+] Author Affiliations
Hui Liu, Xiaojie Wang, Weida Wang, Changle Xiang

Beijing Institute of Technology, Beijing, China

Paper No. IMECE2016-66257, pp. V04BT05A023; 7 pages
doi:10.1115/IMECE2016-66257
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 4B: Dynamics, Vibration, and Control
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5055-8
  • Copyright © 2016 by ASME

abstract

This paper proposes a torsion isolator with negative stiffness structures, which has low stiffness. The torsion isolator has been designed into disk structure, which is the installation position of the positive springs and negative stiffness structures. In this paper, the model of the torsion isolator is introduced firstly, and the nonlinear stiffness and torque are studied under different compression deformation of springs in negative stiffness structures. Then a two-degree-freedom equation of the torsional isolator is established and vibration transmissibility is obtained by using Harmonic Balance Method. Theoretical analysis results show that the isolator with negative stiffness structures has larger isolation frequency range than linear isolator. Finally, an initial experiment is completed. The experimental results show that the isolator has a good vibration isolation performance.

Copyright © 2016 by ASME
Topics: Torsion , Design , Stiffness

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