Nakagawa Seiji, Nihei Kurt T, Myer Larry R, Majer Ernest L
Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
J Acoust Soc Am. 2003 Jun;113(6):3012-23. doi: 10.1121/1.1572139.
Elastic wave scattering off a layer containing a single set of vertical periodic fractures is examined using a numerical technique based on the work of Hennion et al. [J. Acoust. Soc. Am. 87, 1861-1870 (1990)]. This technique combines the finite element method and plane wave method to simulate three-dimensional scattering off a two-dimensional fractured layer structure. Each fracture is modeled explicitly, so that the model can simulate both discrete arrivals of scattered waves from individual fractures and multiply scattered waves between the fractures. Using this technique, we examine changes in scattering characteristics of plane elastic waves as a function of wave frequency, angle of incidence, and fracture properties such as fracture stiffness, height, and regular and irregular spacing.
利用基于亨尼翁等人[《美国声学学会杂志》87, 1861 - 1870 (1990)]工作的数值技术，研究了弹性波在含有单组垂直周期性裂缝的层中的散射。该技术结合了有限元法和平板波法，以模拟二维裂缝层结构的三维散射。每个裂缝都被明确建模，这样该模型就能模拟来自单个裂缝的散射波的离散到达以及裂缝之间的多次散射波。利用这项技术，我们研究了平面弹性波散射特性随波频率、入射角以及裂缝特性（如裂缝刚度、高度、规则和不规则间距）的变化。
