复式类正方格子声子晶体薄板的带隙研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (19) : 171-174.

论文

复式类正方格子声子晶体薄板的带隙研究

赵浩江，刘荣强，郭宏伟，史创

作者信息 +

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

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

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文章历史 +

摘要

将一种复式类正方格子引入声子晶体薄板，其基元包含5个圆形散射体。利用平面波展开法研究了其纵向振动带隙结构，发现通过改变基元内不同位置处散射体的半径比及填充率，可以调节声子晶体带隙的宽度和位置。通过与相同填充率下的正方格子和Bathroom格子对比发现，复式类正方格子在合适的半径比之下可以获得更宽的带隙。

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.

导出引用

赵浩江，刘荣强，郭宏伟，史创. 复式类正方格子声子晶体薄板的带隙研究[J]. 振动与冲击, 2015, 34(19): 171-174

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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