Numerical investigation of diffraction of acoustic waves by phononic crystals

被引：1
|
作者：
Moiseyenko, Rayisa P. [1 ,2 ]
Declercq, Nico F. [2 ]
Laude, Vincent [1 ]
机构：
[1] Univ Franche Comte, Inst FEMTO ST, 32 Ave Observ, F-25044 Besancon, France
[2] Georgia Tech Lorraine, Unite Mixte Int GT CNRS, F-57070 Metz, France
来源：
INTERNATIONAL CONGRESS ON ULTRASONICS (GDANSK 2011) | 2012年 / 1433卷
关键词：
phononic crystal; acoustic diffraction; deaf bands; band gaps;
D O I：
10.1063/1.3703197
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Diffraction as well as transmission of acoustic waves by two-dimensional phononic crystals (PCs) composed of steel rods in water are investigated in this paper. The finite element simulations were performed in order to compute pressure fields generated by a line source that are incident on a finite size PC. Such field maps are analyzed based on the complex band structure for the infinite periodic PC. Finite size computations indicate that the exponential decrease of the transmission at deaf frequencies is much stronger than that in Bragg band gaps.
引用
收藏
页码：319 / 322
页数：4
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