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Proceedings Paper

Vibration control using a variable coil-based friction damper
Author(s): Mohsen Amjadian; Anil K. Agrawal
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Paper Abstract

This paper is focused on the analytical model, design, and simulation of a variable coil-based friction damper (VCBFD) for vibration control of structures. The proposed VCBFD is composed of a soft ferromagnetic plate, made of a linear magnetic material, and two identical thick rectangular air-core coils connected in parallel, each one attached to the plate through a friction pad. The friction force is provided by a normal force produced through an attractive electromagnetic interaction between the air-core coils (ACs) and the soft ferromagnetic plate when sliding relative to each other. The magnitude of the normal force in the damper is varied by a semi-active controller that controls the command current passing through the ACs. To demonstrate the efficiency of the proposed VCBFD and its semi-active controller, it has been implemented on a two-degree-of-freedom (2DOF) base-isolated model subjected to the acceleration components of three records of strong earthquakes. The results show that the performance of the proposed VCBFD in its passive-on mode is overshadowed by the undesirable effects of stick-slip motion. However, the damper in its semi-active mode is more successful in not only reducing the displacement of the base-floor but also avoiding stick-slip motion, due to acting completely in its sliding phase.

Paper Details

Date Published: 11 April 2017
PDF: 11 pages
Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101642J (11 April 2017); doi: 10.1117/12.2257143
Show Author Affiliations
Mohsen Amjadian, The City College of New York (United States)
Anil K. Agrawal, The City College of New York (United States)


Published in SPIE Proceedings Vol. 10164:
Active and Passive Smart Structures and Integrated Systems 2017
Gyuhae Park, Editor(s)

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