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Using a Semi-Active Tuned Mass Damper to Limit the Motion of a Nonlinear Absorber and Attenuate Structural Vibrations

[+] Author Affiliations
R. Parker Eason, Chao Sun, Andrew J. Dick, Satish Nagarajaiah

Rice University, Houston, TX

Paper No. IMECE2012-88068, pp. 1315-1321; 7 pages
doi:10.1115/IMECE2012-88068
From:
  • ASME 2012 International Mechanical Engineering Congress and Exposition
  • Volume 4: Dynamics, Control and Uncertainty, Parts A and B
  • Houston, Texas, USA, November 9–15, 2012
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4520-2
  • Copyright © 2012 by ASME

abstract

When optimally tuned, a tuned mass damper (TMD) can be very effective for reducing the response amplitude of a structure or mechanical system when it is excited near resonance. If the stiffness of the TMD were to develop nonlinear properties, either due to operation outside of its linear range or component degradation, its ability to function can be significantly compromised. Previous work has demonstrated that semi-active tuned mass dampers (STMDs) are able to provide better vibration attenuation than passive devices with significantly lower power requirements than active devices. In this paper, the authors numerically explore the use of an STMD to address the undesirable conditions resulting from a TMD developing nonlinear (cubic) hardening properties. It is found that by adding the STMD in series to the structure/nonlinear TMD (NTMD) system, the response of the NTMD can be reduced, limiting its motion to the linear range where it is able to better attenuate the response of the primary structure.

Copyright © 2012 by ASME
Topics: Dampers , Vibration

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