Aristégui C, Shuvalov A L, Poncelet O, Caleap M
Universite de Bordeaux, UMR 5469, Laboratoire de Mecanique Physique, Talence, France .
J Acoust Soc Am. 2009 Feb;125(2):628-31. doi: 10.1121/1.3056565.
For a halfspace containing random and uniform distribution of empty cylindrical cavities within finite depth beneath the surface, the dispersion spectrum of coherent shear horizontal waves is calculated and analyzed based on the effective-medium approach. The scattering-induced dispersion and attenuation are coupled with the effect of a surface waveguide filled with scatterers. As a result, the obtained spectrum bears certain essential particularities in comparison with the standard Love-wave pattern. Simple analytical estimates enable a direct evaluation of the concentration of scatterers from the dispersion data.
对于一个在地表以下有限深度内包含随机且均匀分布的空圆柱型腔体的半空间，基于有效介质方法计算并分析了相干水平剪切波的频散谱。散射引起的频散和衰减与充满散射体的表面波导的效应相互耦合。结果，与标准的乐甫波模式相比，所得到的频谱具有某些本质上的特殊性。简单的解析估计能够根据频散数据直接评估散射体的浓度。
