Vibration analysis of a multiple-layered viscoelastic structure using the biot damping model

Document Type

Article

Publication Date

3-1-2010

Abstract

The viscoelastic damping treatment is a very popular method for attenuating vibration and noise problems. It provides the designer much flexibility in adjusting the system damping to eliminate resonances in the structures. A survey of the previous research on material damping models found inadequacies in developing the numerical models of multiple-layer constrained layers and the introduction of the combination of different viscoelastic damping materials through advanced frequency domain damping models. In this paper, a detailed numerical analysis and design of a multiple-layer constrained damping structure using the Biot damping model are presented to investigate the vibration performance. The nonlinear curve fitting of the complex shear modulus and the transient response solution of the numerical viscoelastic damping structure are also discussed. By the proposed approach, the simple beam problem that is presented can be easily extended to the industrial problem with arbitrary geometries and boundary conditions. The validation of this numerical approach is proven by comparison with the previous closedform results. Copyright © 2009 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

Publication Title

AIAA Journal

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