Université de Bordeaux, Institut de Mécanique et d'Ingénierie de Bordeaux, UMR 5295, Talence 33405, France.
J Acoust Soc Am. 2013 Feb;133(2):653-60. doi: 10.1121/1.4773266.
The existence of shear horizontal (SH) surface waves in two-dimensional periodic phononic crystals with an asymmetric depth-dependent profile is theoretically reported. Examples of dispersion spectra with bandgaps for subsonic and supersonic SH surface waves are demonstrated. The link between the effective (quasistatic) speeds of the SH bulk and surface waves is established. Calculation and analysis is based on the integral form of a projector on the subspace of evanescent modes which means no need for their explicit finding. This method can be extended to the vector waves and the three-dimensional case.
本文理论上报道了二维非对称深度依赖型周期性声子晶体中存在切向（SH）表面波。给出了亚音速和超音速 SH 表面波带隙的色散谱实例。建立了 SH 体波和表面波的有效（准静态）速度之间的联系。计算和分析基于在消逝模子空间上的投影算子的积分形式，这意味着无需显式地找到它们。该方法可以扩展到矢量波和三维情况。
