Propagation of acoustic waves and waveguiding in a two-dimensional locally resonant phononic crystal plate
Propagation of acoustic waves and waveguiding in a two-dimensional locally resonant phononic crystal plate
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DOI：
10.1063/1.3513218
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发表时间：
2010-11
影响因子：
4
通讯作者：
M. Oudich;M. B. Assouar;Z. Hou
中科院分区：
文献类型：
--
作者：
M. Oudich;M. B. Assouar;Z. Hou
我们演示了兰姆波在局域共振声子晶体（LRPC）中的波导，并分析了弹性波在直波导和弯曲波导中的波导。采用有限元法结合超原胞技术分析了LRPC波导的带隙和色散关系。与传统的声子晶体不同，我们展示了在LRPC波导中只引导一个受限模式的可能性。我们讨论的限制和传输的导模的波导宽度的函数的基础上的带结构和位移场。
We demonstrate the waveguiding of Lamb waves in a locally resonant phononic crystal (LRPC) and we present an analysis of the guiding of elastic waves in straight and bent waveguides. The finite element method combined with the supercell technique was used to analyze the band gap and the dispersion relation of LRPC waveguides. Unlike the traditional phononic crystals, we show the possibility of guiding only one confined mode inside a LRPC waveguide. We discuss the confinement and the transmission of the guided mode as a function of the width of the waveguide based on both the band structure and the displacement field.