Omnidirectional two-dimensional acoustic cloak by axisymmetric cylindrical lattices

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We report a two-dimensional acoustic cloak designed with axisymmetric cylindrical lattices. The proposed axisymmetric lattice layers are optimized such that acoustic cloaking can be effectively realized within realistic material properties regardless of the incoming direction of plane waves. The cylindrical shape of lattice structures consists of five layers and each layer is composed of the same number of circular cylinders to form an axisymmetric lattice structure. The present results show that acoustic cloaking with axisymmetric cylindrical lattices can be realized with many advantages such as use of realistic material properties, simplified geometry, omnidirectional cloaking and controllable cloaking degrees.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2015-04
Language
English
Article Type
Article
Citation

WAVE MOTION, v.54, pp.157 - 169

ISSN
0165-2125
DOI
10.1016/j.wavemoti.2014.12.004
URI
http://hdl.handle.net/10203/196085
Appears in Collection
ME-Journal Papers(저널논문)
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