A Comparison Of Scattering From 2-D And 3-D Rough Interface
Name
1995.10 Cheng_Schultz_Toksoz.pdf
Size
454.93 KB
Format
Adobe PDF
Checksum (MD5)
1d80cc2305981c09114a416a83bfe535
Author(s)
Cheng, Ningya
Schultz, Craig A.
Toksoz, M. Nafi
Date Issued
1995
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1995-10
Abstract
In this paper we compared scattered waves from 2-D and 3-D interface structures. The
modeling technique is the 3-D time domain finite difference method. The scheme is
second-order accurate in time and fourth-order accurate in space. It is implemented on
a massively parallel nCUBE computer. In order to investigate the characteristics of 2-D
and 3-D rough surface scattering, we consider an acoustic-elastic boundary, which is
described by a Gaussian autocorrelation function. The F-K analysis of reflected signals
shows that 2-D scattering generates similar amounts of forward and back scattering,
while in the 3-D case, more forward and less back scattering. The 3-D effects also show
larger reflected energy than the 2-D case, especially near the normal incident. The out-of-plane scatterings are clearly demonstrated on the F-K spectra in the 3-D case. In
the 2-D simulations, we have to keep in mind that it tends to overestimate the amount of backscattering energy.
Persistent DSpace Link
