Rectification of elastic waves in a thin plate
Rectification of elastic waves in a thin plate
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DOI：
10.1063/1.3677997
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发表时间：
2012-01
影响因子：
3.2
通讯作者：
Y. Tanaka;T. Murai;N. Nishiguchi
中科院分区：
文献类型：
--
作者：
Y. Tanaka;T. Murai;N. Nishiguchi
我们提出了一个整流器的弹性波在薄板，这是由一个弹性各向同性的材料包含一个周期性阵列的三角形孔作为散射体，并证明了数值计算，它的工作都为对称和反对称兰姆波以及剪切水平波。这种校正是由于非对称散射体对波散射的几何效应引起的，而散射体周期性排列引起的散射波之间的模式转换和干涉效应的相互作用使其复杂化，这种机制使得在与散射体周期性等效的波长对应的阈值频率以上对系统中典型弹性波进行校正成为可能。
We propose a rectifier of elastic waves in a thin plate, which is made of an elastically isotropic material containing a periodic array of triangular holes as scatterers, and demonstrate numerically that it works both for the symmetric and anti-symmetric Lamb waves as well as shear horizontal waves. The rectification is caused by the geometric effects on wave scattering due to the asymmetric scatterers, while the interplay between the mode conversion and interference effects among the scattered waves owing to the periodic arrangement of scatterers complicates it. The mechanism makes it possible to rectify the typical elastic waves in the system above the threshold frequency corresponding to the wavelength equivalent to the periodicity of scatterers.