For the purpose of simulating large-scale seafloor scattering for general heterogeneous media using an elastic finite-difference scheme, I develop new tools for modeling explosive point sources and pressure plane waves traveling at given angles of incidence and for efficiently simulating a free surface on a staggered grid. The absorbing boundary conditions and finite-difference scheme were chosen to minimize memory requirements, a vital consideration for three-dimensional simulations. In addition, the algorithms are designed with large amounts of parallelism, making them suitable for modern supercomputers and feasible tools for Monte Carlo investigations.
Using these tools, I simulate scattering from a Goff-Jordan seafloor model with self-similar bathymetry. The results underscore the importance of fully elastic modeling in understanding the origin and strength of the reverberatory coda not present for smooth, planar seafloor models.
| Identifer | oai:union.ndltd.org:RICE/oai:scholarship.rice.edu:1911/13933 |
| Date | January 1995 |
| Creators | Chemingui, Nizar |
| Contributors | Levander, Alan R. |
| Source Sets | Rice University |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | 76 p., application/pdf |
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