Open Access

ARTICLE

A Method Based on Wavelets for Band Structure Analysis of Phononic Crystals

by Zhi-Zhong Yan¹, Yue-Sheng Wang¹, Chuanzeng Zhang²

1 Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China
2 Department of Civil Engineering, University of Siegen, D-57068 Siegen, Germany
3 Corresponding author. Tel: +86-10-51688417, E-mail:yswang@bjtu.edu.cn

Computer Modeling in Engineering & Sciences 2008, 38(1), 59-88. https://doi.org/10.3970/cmes.2008.038.059

Abstract

In this paper, a numerical method based on the wavelet theory is developed for calculating band structures of 2D phononic crystals consisting of general anisotropic materials. After systematical consideration of the appropriate choice of wavelets, two types of wavelets, the Haar wavelet and Biorthogonal wavelet, are selected. Combined with the supercell technique, the developed method can be then applied to compute the band structures of phononic crystals with point or line defects. We illustrate the advantages of the method both mathematically and numerically. Particularly some representative numerical examples are presented for various material combinations (solid-solid, solid-fluid and fluid-fluid) with complex lattice structures to show the accuracy, fast convergence and wide applicability of the method.

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Keywords

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