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Proceedings Paper

Finite element model for active constrained layer damping
Author(s): William C. Van Nostrand; 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. Active damping using smart materials has been investigated a great deal recently. 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. The effects of the thickness and stiffness of the viscoelastic layer are studied. Experimental transfer functions for various configurations are presented. 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: 2 February 1995
PDF: 16 pages
Proc. SPIE 2427, Active Materials and Smart Structures, (2 February 1995); doi: 10.1117/12.200912
Show Author Affiliations
William C. Van Nostrand, Grumman Corporate Research Ctr. (United States)
Daniel J. Inman, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 2427:
Active Materials and Smart Structures
Gary L. Anderson; Dimitris C. Lagoudas, Editor(s)

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