Journal
ENGINEERING STRUCTURES
Volume 122, Issue -, Pages 62-71Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2016.04.017
Keywords
Cable dynamics; Tuned inerter damper (TID); Vibration suppression
Categories
Funding
- University of Bristol studentship
- EPSRC fellowship [EP/K005375/1]
- EPSRC [EP/K003836/]
- Engineering and Physical Sciences Research Council [EP/K005375/1, EP/K003836/2] Funding Source: researchfish
- EPSRC [EP/K005375/1, EP/K003836/2] Funding Source: UKRI
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This paper considers the use of a tuned inerter damper (TID) system for suppressing unwanted cable vibrations. The TID consists of an inerter, a device that exerts a force proportional to relative acceleration, coupled with a parallel spring and damper. It may be thought of as similar to a tuned-mass-damper, but requiring two terminals. As a two terminal device, the performance of the TID is compared to the classical use of viscous dampers (VD) located close to one of the cable supports. We show that the limitation that exists with VDs, where the modal damping of the cable cannot exceed a maximum level for a given damper location, can be overcome through the use of the TID at the same location. A practical design methodology, based on the minimisation of the displacement amplitude at the mid-span of the cable subjected to support excitation, is proposed. An example where a cable is subjected to the El-Centro earthquake demonstrates that the system's response is improved when a TID is used instead of a VD. (C) 2016 The Author(s). Published by Elsevier Ltd.
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