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Proceedings Paper

Agglomeration of magnetorheological fluid mass to an immersed vibrating electromagnet
Author(s): Andrew N. Vavreck; Jessica E. Black
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Paper Abstract

Dynamic vibration absorbers (DVAs) have been designed with variable spring and damping elements to enable realtime or non-real-time adaptation to vibration conditions. Mass, the third element of a DVA, is more difficult to adjust. The subject paper describes an experimental study of a small electromagnet immersed in magnetorheological (MR) fluid and vibrated at a single frequency by an electrodynamic shaker as force and acceleration data are acquired. When the magnet is energized, MR fluid clings to it, potentially allowing for design of a DVA with variable mass and even damping, as the shape of the electromagnet-MR fluid mass changes. It is found that the effective mass of the system depends on the vibration conditions, with less mass adhering at higher frequencies and displacements, but significant increases in mass are possible at lower frequencies and displacements. The paper outlines the experimental apparatus used, presents data acquired, and proposes a dependency of the effective mass on frequency and displacement.

Paper Details

Date Published: 27 April 2007
PDF: 8 pages
Proc. SPIE 6525, Active and Passive Smart Structures and Integrated Systems 2007, 65250A (27 April 2007); doi: 10.1117/12.715717
Show Author Affiliations
Andrew N. Vavreck, The Pennsylvania State Univ. (United States)
Jessica E. Black, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 6525:
Active and Passive Smart Structures and Integrated Systems 2007
Yuji Matsuzaki; Mehdi Ahmadian; Donald J. Leo, Editor(s)

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