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

被引：32
作者：
Mazzotti, Matteo [1 ]
Miniaci, Marco [2 ]
Bartoli, Ivan [1 ]
机构：
[1] Drexel Univ, Civil Architectural & Environm Engn Dept, 3141 Chestnut St, Philadelphia, PA 19104 USA
[2] Univ Havre, Lab Ondes & Milieux Complexes, UMR CNRS 6294, 75 Rue Bellot, F-76600 Le Havre, France
来源：
ULTRASONICS | 2017年 / 74卷
关键词：
Phononic crystals; Leaky Bloch waves; Attenuation; Band structure; Finite element method; Plane wave expansion method; FINITE-ELEMENT-METHOD; LAMB WAVES; SCATTERING; PROPAGATION; DISPERSION; GUIDES; MEDIA;
D O I：
10.1016/j.ultras.2016.10.006
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
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. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：140 / 143
页数：4
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