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Proceedings Paper

Vibration control of plates using magnetic constrained layer damping
Author(s): A. K. Ebrahim; Amr M. Baz
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Paper Abstract

A new class of surface treatment is proposed to provide effective means for attenuating undesirable structural vibrations. The proposed treatment relies in its operation on the use of smart damping treatments which consists of integrated arrays of constrained visco-elastic damping layers that are controlled passively by a specially arranged network of permanent magnets. The interaction between the magnets and the visco-elastic layers aims at enhancing the energy dissipation characteristics of the damping treatment. In this manner, it would be possible to manufacture structures that are light in weight which are capable of meeting strict constraints on structural vibration when subjected to unavoidable disturbances. This new treatment will be called Magnetic Constrained Layer Damping (MCLD) treatment. A finite element modeling of a plate treated with MCLD treatments is developed. This model describes the dynamics and the damping characteristics of this structure. The numerical results are verified experimentally using a cantilever plate fully treated with MCLD with the magnets placed at the root of the plate. Close agreement is obtained between theory and experiments. Also the performance characteristics of the MCLD is compared with the corresponding performance of the conventional Passive Constrained Layer Damping (PCLD). The effectiveness of the MCLD in attenuating structural vibration of the plate has been clearly demonstrated in the frequency domain. The developed theoretical and experimental techniques present invaluable tools for designing and predicting the performance of plates treated with MCLD.

Paper Details

Date Published: 16 June 1998
PDF: 21 pages
Proc. SPIE 3327, Smart Structures and Materials 1998: Passive Damping and Isolation, (16 June 1998); doi: 10.1117/12.310679
Show Author Affiliations
A. K. Ebrahim, Military Technical College (United States)
Amr M. Baz, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 3327:
Smart Structures and Materials 1998: Passive Damping and Isolation
L. Porter Davis, Editor(s)

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