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An Eccentric Rotator as a Novel Design of a Nonlinear Energy Sink

[+] Author Affiliations
Oleg V. Gendelman

Technion – Israel Institute of Technology, Haifa, Israel

Grigori Sigalov, Mercedes Mane, Lawrence A. Bergman, Alexander F. Vakakis

University of Illinois at Urbana-Champaign, Urbana, IL

Leonid I. Manevitch

Russian Academy of Sciences, Moscow, Russia

Paper No. DETC2011-47764, pp. 369-379; 11 pages
doi:10.1115/DETC2011-47764
From:
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 23rd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5478-5
  • Copyright © 2011 by ASME

abstract

We introduce a novel type of the nonlinear energy sink (NES) designed as an eccentric mass rotating within a horizontal plane. The gravity is not a factor here, therefore such a rotator has no eigenfrequency and can inertially couple and resonate with any mode of the primary system. The dynamics of the system consisting of a primary linear oscillator and the eccentric rotator is rich beyond expectations and features multiple resonances and chaotic modes. A numerical study shows that the system, when subject to high impulsive loads, inevitably enters a 1:1 resonance that enables highly efficient targeted energy transfer from the primary mass to the NES. The results of an experimental investigation are in good agreement with the analytical and numerical estimates.

Copyright © 2011 by ASME

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