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A finite element method towards acoustic phononic crystals by weak formulation SCIE SCOPUS

Title
A finite element method towards acoustic phononic crystals by weak formulation
Authors
Lee, DongwooKim, MinkyungRho, Junsuk
Date Issued
2019-09
Publisher
IOP PUBLISHING LTD
Abstract
A weak formulation method is presented to analyze the propagation of acoustic waves in periodic crystal-like systems called phononic crystals. First, a compact circle and double split ring resonators with high impedance contrast to air background are employed to compute band structures with not only real parts of wavevectors but also imaginary parts of them. Calculating the imaginary part, which directly predicts a propagation length in band gaps, is not readily available in previous studies. It analytically enables us to more understand the behavior of evanescent mode in band gaps. Moreover, we present that the weak formulation method is advantageous in calculating equi-frequency contour.
URI
https://oasis.postech.ac.kr/handle/2014.oak/101848
DOI
10.1088/1361-648X/ab2700
ISSN
0953-8984
Article Type
Article
Citation
JOURNAL OF PHYSICS-CONDENSED MATTER, vol. 31, no. 37, 2019-09
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노준석RHO, JUNSUK
Dept of Mechanical Enginrg
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