Abstract
Recent advances in the understanding of dynamic properties of viscoelastic materials have resulted in many innovative means to enhance the inherent damping in structural systems. Damping is now recognized as a design parameter in all stages of analysis and design of structures subjected to dynamic loading. The purpose of this paper is to describe the status of knowledge concerning the application of viscoelastic materials for passive vibration and noise control of structures subjected to dynamic loading. First, the presentation will focus on various mathematical modeling techniques and measurement methods as applied to damping in general, and viscoelastic damping in particular. The advantages and limitations associated with each model/method will be described in the context of recent experimental study of the damping of graphite epoxy composite materials and joints. Then, current research on the prediction of modal parameters (resonance frequencies, loss factors, and mode shapes) of bonded composite structural joints incorporating viscoelastic damping materials will be presented. [Work supported by NSF.]
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