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Band structure analysis of leaky Bloch waves in 2D phononic crystal plates.

Identifieur interne : 000006 ( PubMed/Corpus ); précédent : 000005; suivant : 000007

Band structure analysis of leaky Bloch waves in 2D phononic crystal plates.

Auteurs : Matteo Mazzotti ; Marco Miniaci ; Ivan Bartoli

Source :

RBID : pubmed:27776276

Abstract

A hybrid Finite Element-Plane Wave Expansion method is presented for the band structure analysis of phononic crystal plates with two dimensional lattice that are in contact with acoustic half-spaces. The method enables the computation of both real (propagative) and imaginary (attenuation) components of the Bloch wavenumber at any given frequency. Three numerical applications are presented: a benchmark dispersion analysis for an oil-loaded Titanium isotropic plate, the band structure analysis of a water-loaded Tungsten slab with square cylindrical cavities and a phononic crystal plate composed of Aurum cylinders embedded in an epoxy matrix.

DOI: 10.1016/j.ultras.2016.10.006
PubMed: 27776276

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<div type="abstract" xml:lang="en">A hybrid Finite Element-Plane Wave Expansion method is presented for the band structure analysis of phononic crystal plates with two dimensional lattice that are in contact with acoustic half-spaces. The method enables the computation of both real (propagative) and imaginary (attenuation) components of the Bloch wavenumber at any given frequency. Three numerical applications are presented: a benchmark dispersion analysis for an oil-loaded Titanium isotropic plate, the band structure analysis of a water-loaded Tungsten slab with square cylindrical cavities and a phononic crystal plate composed of Aurum cylinders embedded in an epoxy matrix.</div>
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