Three-dimensional elastic wave scattering by a layer containing vertical periodic fractures.
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.
Nakagawa
Seiji
S
Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. snakagawa@lbl.gov
Nihei
Kurt T
KT
Myer
Larry R
LR
Majer
Ernest L
EL