BAND GAP COMPUTATION FOR MIXED SOLID-FLUID PHONONIC CRYSTALS OF TRIANGULAR LATTICE BY DIRICHLET-TO-NEUMANN MAPS

被引：0
|
作者：
Li, F. L. [1 ]
Wang, Y. S. [1 ]
Zhang, C. [2 ]
机构：
[1] Beijing Jiaotong Univ, Inst Engn Mech, Beijing 100044, Peoples R China
[2] Univ Siegen, Dept Civil Engn, D-57076 Siegen, Germany
来源：
ADVANCES IN HETEROGENEOUS MATERIAL MECHANICS 2011 | 2011年
基金：
中国国家自然科学基金;
关键词：
band gaps; phononic crystals; Dirichlet-to-Neumann map;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A numerical method based on Dirichlte-to-Neumann (DtN) map for calculating the band gaps of two-dimensional (2D) phononic crystals with mixed solid and fluid components is presented. It is applied to a triangular lattice of circular solid cylinders in a fluid matrix, for which the conventional plane wave expansion method may fail due to different wave modes in the solid and fluid. The DtN map is constructed by using the cylindrical function expansions. Linear eigenvalue problems are formulated, from which the band structures can be determined. Two numerical examples are illustrated to show the efficiency of present method.
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页码：298 / +
页数：2
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