Flexural wave cloaking via embedded cylinders with systematically varying thicknesses

Title
Flexural wave cloaking via embedded cylinders with systematically varying thicknesses
Author
박준홍
Keywords
METAMATERIAL
Issue Date
2016-06
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Citation
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v. 139, NO 6, Page. 3319-3323
Abstract
Simulations of flexural wave cloaking from multiple scattering events that are achieved by embedded cylinders in a thin plate are performed. Minimization of refraction is performed using small surrounding cylinders with varying thickness in radial and angular directions, respectively. The thickness variations render the effective wave speed lower in the radial direction and higher in the angular direction compared to the speed in the surrounding media, which results in the cloaking effect. In order to verify the feasibility of this approach, 15 layers of cylinders are placed around the blocked area. The multiple-scattering method is used to predict wave propagations and to take the interactions between cylinders into account. The effects of the thickness variation on the cloaking performance are analyzed. The results demonstrate that minimal scattering is achieved when the area of interest is surrounded by the thickness-varying cylinders. (C) 2016 Acoustical Society of America.
URI
https://asa.scitation.org/doi/10.1121/1.4950738http://repository.hanyang.ac.kr/handle/20.500.11754/71738
ISSN
0001-4966; 1520-8524
DOI
10.1121/1.4950738
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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