Experimental Verification of Smart Cable Damping
Publication: Journal of Engineering Mechanics
Volume 132, Issue 3
Abstract
Stay cables, such as are used in cable-stayed bridges, are prone to vibration due to their low inherent damping characteristics. Transversely attached passive viscous dampers have been implemented in many bridges to dampen such vibration. However, only minimal damping can be added if the attachment point is close to the bridge deck. For longer bridge cables, the relative attachment point becomes increasingly smaller, and passive damping may become insufficient. A recent analytical study by the authors demonstrated that “smart” semiactive damping can provide increased supplemental damping. This paper experimentally verifies a smart damping control strategy employing clipped optimal control using only force and displacement measurements at the damper for an inclined flat-sag cable. A shear mode magnetorheological fluid damper is attached to a inclined flat-sag steel cable to reduce cable vibration. Cable response is seen to be substantially reduced by the smart damper.
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Acknowledgments
The writers gratefully acknowledge the support of this research by the National Science Foundation under Grant No. NSFCMS 99-00234 and CAREER Grant No. UNSPECIFIEDCMS 00-94030, and by the LORD Corporation.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 132 • Issue 3 • March 2006
Pages: 268 - 278
Copyright
© 2006 ASCE.
History
Received: Mar 16, 2004
Accepted: Jul 14, 2005
Published online: Mar 1, 2006
Published in print: Mar 2006
Notes
Note. Associate Editor: Raimondo Betti
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