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Title :一部に欠陥を有する二次元周期場の動弾性解析
Title alternative :Elastodynamic analysis of two-dimensional periodic structures having a defect
Authors :阿部, 和久
本間, 広紀
紅露, 一寛
Publisher :土木学会
Issue Date :Aug-2012
Journal Title :土木学会論文集A2(応用力学)
Volume :68
Issue :2
Start Page :823
End Page :831
Abstract :This paper presents a numerical method for two-dimensional solid phononic crystals having a defect. This problem is divided into two domains of the finite defective region and the surrounding periodic medium. The analysis method is then constructed by combining the finite element equation of the irregular region with the impedance matrix representing the external field. The impedance matrix is derived by analyzing a series of harmonic excitation problems of a periodic field given by the surrounding array. These solutions are obtained by the aid of Floquet transform. The developed method is applied to wave propagations through a defective field imbedded in a square lattice of circular holes. Modes trapped in the disturbed region are also analyzed for a composite material possessing a dispersion structure with a wide bandgap.
Keywords :phononic crystals
point defect
wave propagation
local modes
Type Local :学術雑誌論文
Language :jpn
Format :application/pdf
URI :http://hdl.handle.net/10191/31807
fullTextURL :http://dspace.lib.niigata-u.ac.jp/dspace/bitstream/10191/31807/1/68_I_823.pdf
Relation :https://www.jstage.jst.go.jp/article/jscejam/68/2/68_I_823/_pdf
Rights :公益社団法人土木学会
Appears in Collections:10 査読済論文 = Postprint

Please use this identifier to cite or link to this item: http://hdl.handle.net/10191/31807