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Proceedings Paper

Finite element model for active constrained-layer damping
Author(s): William C. Van Nostrand; Gareth J. Knowles; Daniel J. Inman
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Paper Abstract

Constrained layer damping has been used for many years to increase the damping in engineering structures. Several researchers have suggested the concept of using viscoelastic materials with piezoceramics as the constraining layer. Since the piezoceramics are active materials, this concept can be referred to as active constrained layer damping. The paper presents a finite element model for a sandwich beam consisting of a host layer, a viscoelastic layer, and a piezoelectric layer. Lesieutre's method (Augmenting Thermodynamic Fields) for modeling damping was modified and applied to active constrained layer damping. Previous work on active constrained layer material has used the loss factor approach to modeling the viscoelastic layer. Such approaches are limited to steady state considerations, while the approach taken here is suitable for transient disturbances. Active damping and passive damping are individually of interest, however, here we propose to combine these two types of damping to produce an active constrained layer system with the best of both technologies.

Paper Details

Date Published: 1 May 1994
PDF: 12 pages
Proc. SPIE 2193, Smart Structures and Materials 1994: Passive Damping, (1 May 1994); doi: 10.1117/12.174091
Show Author Affiliations
William C. Van Nostrand, Grumman Corporate Research Ctr. (United States)
Gareth J. Knowles, Grumman Corporate Research Ctr. (United States)
Daniel J. Inman, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 2193:
Smart Structures and Materials 1994: Passive Damping
Conor D. Johnson, Editor(s)

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