Impact of losses on Love wave propagation in multilayered composite structures loaded with a Newtonian liquid
Autor: | Andrzej Balcerzak, Kiełczyński Piotr, Krzysztof Wieja, Marek Szalewski |
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Rok vydání: | 2020 |
Předmět: |
Surface (mathematics)
Materials science Mechanical Engineering Composite number Aerospace Engineering 030206 dentistry Mechanics 01 natural sciences 03 medical and health sciences Love wave 0302 clinical medicine Mechanics of Materials Surface wave 0103 physical sciences Automotive Engineering Newtonian fluid General Materials Science 010301 acoustics |
Zdroj: | Journal of Vibration and Control. 26:2221-2229 |
ISSN: | 1741-2986 1077-5463 |
Popis: | In this study, we analyze theoretically and numerically the properties of Love surface waves propagating in lossy multilayered composite waveguides, loaded on the upper surface with a Newtonian liquid. The propagation of Love surface waves was formulated in terms of a direct Sturm–Liouville problem. An analytical form of the complex dispersion equation of the Love surface wave was derived using the Thomson–Haskell transfer matrix method. By separating the complex dispersion equation into its real and imaginary parts, we obtained a set of two nonlinear algebraic equations, which were subsequently solved numerically. The effect of various physical parameters of the lossy viscoelastic waveguide on the velocity and attenuation of the Love surface wave was then analyzed numerically. It was found that because of the presence of losses in the analyzed waveguide, Love surface waves displayed a number of new original phenomena, such as resonant-like maxima in attenuation as a function of thicknesses [Formula: see text] of the first viscoelastic surface layer and thickness [Formula: see text] of the second elastic surface layer. These phenomena are completely absent in lossless waveguides. |
Databáze: | OpenAIRE |
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