Finite element modeling and dynamic analysis of passive constrained layer damping plate based on laminated theory

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (23) : 148-153.

HUANG Zhicheng1, WANG Xingguo1, WU Nanxing1, CHU Fulei2， LUO Jing3

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Abstract

The finite element dynamic model of a passive constrained layer damping (PCLD) plate was established based on the laminated theory.A 3-layer plate element with four-node and 5-DOF per node was constructed to simulate interaction among base plate, viscoelastic damping layer and constraint layer.The frequency-dependent properties of viscoelastic material were described with Biot model, and they were introduced into the finite element dynamic equation of a PCLD plate by means of auxiliary coordinates, and then the latter was converted into the ordinary second-order differential equation form to simplify the solving process.The effectiveness of the proposed method was verified with the comparison between numerical examples and test results.Results showed that compared with the traditional finite element modeling theory, using the laminated theory can reduce the structure’s DOF and have good calculation accuracy.

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passive constrained layer damping (PCLD) plate / finite element method / viscoelastic material / laminated theory

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HUANG Zhicheng1, WANG Xingguo1, WU Nanxing1, CHU Fulei2， LUO Jing3. Finite element modeling and dynamic analysis of passive constrained layer damping plate based on laminated theory[J]. Journal of Vibration and Shock, 2020, 39(23): 148-153

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