Experimental Investigation of Linear Particle Chain Impact Dampers in Free-Vibration Suppression
Publication: Journal of Structural Engineering
Volume 143, Issue 2
Abstract
Impact dampers have been considered as energy dissipating mechanisms for many years, and many types have been introduced. The latest member of the impact damper family is called the linear particle chain (LPC) impact damper, which is considered as an extension to the commonly known single unit and multi-unit impact dampers. It consists of a linear arrangement of two sizes of freely moving masses, constrained by two stops, and located on a primary system to be controlled. In this work, the results of an experimental study of the performance of the LPC impact damper are presented. The first prototype of the LPC impact damper is designed, fabricated, and experimentally tested. The experiments are conducted to examine the efficiency of the LPC impact damper in damping the free vibrations of a simple structure. The damping performance of the LPC impact damper is compared with those of a single unit and multi-unit impact dampers. The experimental results clearly show the significant effect of the LPC impact damper in attenuating the structure’s vibration. The investigations indicate that the damping performance of the LPC impact damper depends on the mass ratio of the impacting masses, the damper clearance, and the damper chain length.
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Acknowledgments
The authors acknowledge the support of Qatar National Research Fund under the award number PDRA 1-1231-13034.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 2 • February 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Aug 20, 2015
Accepted: Jul 12, 2016
Published online: Aug 24, 2016
Discussion open until: Jan 24, 2017
Published in print: Feb 1, 2017
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