The Proceedings of The Computational Mechanics Conference
Online ISSN : 2424-2799
2011.24
Session ID : 1307
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1307 Acoustic Lens Effect and Energy-Transmission Efficiency via Phononic Crystal
Yusuke KANNO, Yuuki KASAI, Kenji TSURUTA, Kazuhiro FUJIMORI, Hideki FUKANO, Shigeji NOGI
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Keywords: Phononic Crystal, Graded Index, Lens Effect, FDTD
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Abstract
Lens effect of acoustic waves in a two-dimensional (2D) phononic crystal is studied by numerical simulation based on the finite-difference time-domain (FDTD) method. We calculate the phonon band structure of 2D phononic crystals, consisting of metal cylinders placed periodically in water. Lens effect is observed for far-field wave in the phononic crystal with graded-index structure. These results indicate that a novel energy-transmission device can be designed using phononic crystals.
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© 2011 The Japan Society of Mechanical Engineers
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