A Thermoviscoelastic Dynamic Vibration Absorber

[+] Author and Article Information
R. Fosdick, Y. Ketema

Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455

J. Appl. Mech 65(1), 17-24 (Mar 01, 1998) (8 pages) doi:10.1115/1.2789023 History: Received April 16, 1997; Revised July 01, 1997; Online October 25, 2007


A dynamic vibration absorber with a viscoelastic element is studied. The viscoelastic element is modeled as a material with memory in which the internal dissipative force depends on current, as well as previous deformations. The viscoelastic behavior is governed by two parameters: the relaxation modulus Go , and the relaxation time γ. We apply the principle of time-temperature superposition to affect a dependence of the relaxation time γ on temperature. This temperature dependence can be used to tune a vibration absorber so as to be effective at more than one excitation frequency.

Copyright © 1998 by The American Society of Mechanical Engineers
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