Realization of a Strongly Nonlinear Vibration-Mitigation Device Using Elastomeric Bumpers
This article has been corrected.
VIEW CORRECTIONPublication: Journal of Engineering Mechanics
Volume 140, Issue 5
Abstract
Recent research has shown the viability of using nonlinear energy-sink (NES) devices for vibration mitigation in mechanical and structural systems. When attached to a primary structure, these lightweight passive devices can effectively reduce the structural vibration response through their nonlinear stiffness properties. In this research, a two-degree-of-freedom NES device is designed using innovative elastomeric bumpers as the critical components providing nonlinear restoring forces. A number of elastomeric bumper configurations are evaluated experimentally, and the effect of geometric bumper parameters is investigated with a focus on their influence on the stiffness properties of the bumper. A NES device employing different bumpers is then implemented on a 6-story model building and tested using impulse-like base motion. Nonlinear system identification of the NES device shows that nonlinear stiffness properties are achieved using the elastomeric bumpers. Shake-table testing of the building equipped with the NES device demonstrates that the device is capable of dissipating and redistributing the induced vibration energy in a rapid, effective, and robust fashion.
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Acknowledgments
This research program was sponsored by the Defense Advanced Research Projects Agency (DARPA) through Grant HR0011-10-1-0077 under program manager Dr. Aaron Lazarus. The content of this paper does not necessarily reflect the position or policy of the U.S. government, and no official endorsement should be inferred.
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Published In
Journal of Engineering Mechanics
Volume 140 • Issue 5 • May 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 27, 2012
Accepted: Jul 8, 2013
Published online: Jul 10, 2013
Published in print: May 1, 2014
Discussion open until: Jun 7, 2014
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