Experimental and numerical study of evanescent waves in the mini stopband of a 1D phononic crystal

被引：10

作者：

Bavencoffe, Maxime ^{[1
]}

Morvan, Bruno ^{[2
]}

Hladky-Hennion, Anne-Christine ^{[3
]}

Izbicki, Jean-Louis ^{[2
]}

机构：

[1] Groupement Rech Mat Microelect Acoust Nanotechnol, UMR 7347, CNRS, ENI Val de Loire, F-41034 Blois, France

[2] Univ Havre, UMR 6294, Lab Ondes & Milieux Complexes LOMC, CNRS, F-76610 Le Havre, France

[3] Inst Elect Microelect & Nanotechnol IEMN, UMR 8520, ISEN Dept, CNRS, F-59046 Lille, France

来源：

ULTRASONICS | 2013年 / 53卷 / 02期

关键词：

Phononic crystal; Evanescent wave; PERIODIC-SYSTEMS; CYLINDRICAL-SHELLS; SINUSOIDAL WALLS; COUPLED SYSTEMS; ACOUSTIC-WAVES; NATURAL-MODES; LAMB WAVES; BAND-GAPS; PROPAGATION; GUIDES;

D O I：

10.1016/j.ultras.2012.09.009

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper deals with the analysis of the guided evanescent waves in stopbands of a 1D phononic crystal PC). A new numerical implementation is shown in order to get the complex values of the wavenumbers in a frequency range where a gap occurs. The considered phononic system is an aluminum plate with a one-dimensional sinusoidal grating. For this structure a mode-gap (mini stopband) occurs at low frequency: it involves the two fundamental Lamb modes A(0) and S-0. The numerical study is performed by using a finite element method (ATILA code). The experiments deal with a finite length grating and evanescent waves are characterized at the vicinity of the mini stopband. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：313 / 319

页数：7

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