Research on Band Gaps of Thin Phononic Crystal Plates With Complex Square-like Lattice

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (19) : 171-174.

ZHAO Hao-Jiang LIU Rong-Qiang GUO Hong-Wei SHI Chuang

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Abstract

A thin phononic crystal plate with complex square-like lattice which has five circular scatterers in its unit cell is studied. Longitudinal vibration band gaps of this plate are calculated by the plane wave expansion method. Numerical results show that the width and location of the band gaps can be tuned by changing the filling fraction and the radius ratio of scatterers at different position in the unit cell. Comparing to the square lattice and the bathroom lattice with the same filling fraction, a wider gap can be obtained by the complex square-like lattice with an appropriate radius ratio.

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phononic crystal / band gap / plane wave expansion method / thin plate

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ZHAO Hao-Jiang LIU Rong-Qiang GUO Hong-Wei SHI Chuang . Research on Band Gaps of Thin Phononic Crystal Plates With Complex Square-like Lattice[J]. Journal of Vibration and Shock, 2015, 34(19): 171-174

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