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Energy Absorption and Dissipation Performance in Cycloid Guided Pendulum Absorbers

[+] Author Affiliations
Younes Rashidi, Siamak Arzanpour

Simon Fraser University, Surrey, BC, Canada

Mehrzad Tabatabaian

BCIT - British Columbia Institute of Technology, Burnaby, BC, Canada

Paper No. IMECE2010-39835, pp. 297-302; 6 pages
doi:10.1115/IMECE2010-39835
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 13: Sound, Vibration and Design
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4450-2
  • Copyright © 2010 by ASME

abstract

The dynamic energy absorbers are auxiliary systems that are attached to the main structure and widely used as a simple solution for neutralization of vibrations. Among various types of pendulum vibration absorbers are preferable for high-rise buildings, bridges and other civil structures for suppression earthquake-excited vibrations. The problem in dissipating vibration of earthquake is its unknown characteristics such as excitation frequency and magnitude. As a result, designing of an effective self tuning vibration absorber that can adjust its performance according to the excitation frequency will be a challenge. The situation is to have an absorber that can respond at a single frequency for wide range of excitation amplitude so its parameter can be well adjusted for the maximum energy dissipation. It is shown [5] that period in cycloid pendulum is constant for large amplitude. This feature is a major advantage of cycloid pendulum absorbers that could be used in combination with an energy dissipation mechanism to reduce the induced motion in a structure. In this paper, two types of vibration absorbers, i.e., simple and cycloid pendulum are analytically compared. The simulation results demonstrate the superiority of the cycloid damper type in energy absorption/dissipation over a simple pendulum one.

Copyright © 2010 by ASME

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