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Determination of Damping Properties of an Elongated Plate with an Integral Damping Coating on the Base of Studying Complex Eigenfrequencies

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Abstract

We describe the structure of a perspective integral damping coating consisting (with respect to the thickness) of two layers of a viscoelastic material with a thin reinforcing layer in-between. We propose a four-layer finite element model with fourteen degrees of freedom for a plate with a mentioned damping coating. This model allows us to take into account the effect of transversal compression of damping layers under high-frequency vibrations of the plate. For determining some lower complex modes and frequencies of free vibrations of the damped plate, we solve a generalized complex eigenvalue problem using the method of iterations in a subspace.

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Funding

This work was supported by the Russian Scientific Foundation (project no. 19-19-00058).

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Correspondence to V. N. Paimushin, V. A. Firsov or V. M. Shishkin.

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Russian Text © The Author(s), 2020, published in Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika, 2020, No. 6, pp. 48–64.

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Paimushin, V.N., Firsov, V.A. & Shishkin, V.M. Determination of Damping Properties of an Elongated Plate with an Integral Damping Coating on the Base of Studying Complex Eigenfrequencies. Russ Math. 64, 40–55 (2020). https://doi.org/10.3103/S1066369X20060079

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  • DOI: https://doi.org/10.3103/S1066369X20060079

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