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http://dx.doi.org/10.5050/KSNVN.2005.15.7.829

Optimal Treatment of Unconstrained Visco-elastic Damping Layer on Beam to Minimize Vibration Responses  

Lee, Doo-Ho (동의대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.15, no.7, 2005 , pp. 829-835 More about this Journal
Abstract
An optimization formulation of unconstrained damping treatment on beam is proposed to minimize vibration responses using a numerical search method. The fractional derivative model is combined with RUK's equivalent stiffness approach in order to represent nonlinearity of complex modulus of damping materials with frequency and temperature. Vibration responses are calculated by using the modal superposition principle, and of which design sensitivity formula with respect to damping layout is derived analytically. Plugging the sensitivity formula into optimization software, we can determine optimally damping treatment region that gives minimum forced response under a given boundary condition. A numerical example shows that the proposed method is very effective in suppressing nitration responses by means of unconstrained damping layer treatment.
Keywords
Optimal Treatment; Unnconstrained Damping Layer; Viscoelastlc Material; Fractional Derivative Model; Design Sensitivity;
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Times Cited By KSCI : 2  (Citation Analysis)
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