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Erschienen in: Acta Mechanica 8/2021

07.05.2021 | Original Paper

Complex band structure and attenuation performance of a viscoelastic phononic crystal with finite out-of-plane extension

verfasst von: Jingru Li, Peng Yang, Qingfen Ma, Maolong Xia

Erschienen in: Acta Mechanica | Ausgabe 8/2021

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Abstract

To gain a complete view on the unique spatial attenuation phenomenon arising from the periodicity and the material viscoelasticity of the two-dimensional phononic crystals with finite out-of-plane extension, this paper presents a theoretical study of the viscoelastic phononic crystal slabs to investigate the wave transmission characteristics in terms of the dispersion relations for the propagating, evanescent, and complex modes. A numerical approach based on the theory of three-dimensional elasticity is proposed to eliminate the restrictions of plane analysis and to obtain the complex band diagrams using the wave expansion functions combined with the finite discretization technique. This formulation allows one to perform the simulations associated with the nonlinear frequency-dependent viscoelastic property which is accurately described by a generalized Maxwell model in this work. Numerical results are presented to show the validity of the established model and to reveal the dissipation mechanisms inside and outside the band gaps as well as to investigate the effects induced by the material viscoelasticity on the attenuation diagrams. Furthermore, the influences of the out-of-plane extension, the geometrical size and the shape of the etcfhed holes are detailed discussed to obtain thorough understandings of such a finite solid viscoelastic periodic lattice which is indispensable to practical applications.
Literatur
57.
Zurück zum Zitat Lakes, R.: Viscoelastic Materials. Cambridge University Press, Cambridge (2009)CrossRef Lakes, R.: Viscoelastic Materials. Cambridge University Press, Cambridge (2009)CrossRef
Metadaten
Titel
Complex band structure and attenuation performance of a viscoelastic phononic crystal with finite out-of-plane extension
verfasst von
Jingru Li
Peng Yang
Qingfen Ma
Maolong Xia
Publikationsdatum
07.05.2021
Verlag
Springer Vienna
Erschienen in
Acta Mechanica / Ausgabe 8/2021
Print ISSN: 0001-5970
Elektronische ISSN: 1619-6937
DOI
https://doi.org/10.1007/s00707-021-02969-8

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