A Comparison Of Scattering From 2-D And 3-D Rough Interface
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 ord...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Technical Report |
| Published: |
Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/75257 |
| _version_ | 1826209240797151232 |
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| author | Cheng, Ningya Schultz, Craig A. Toksoz, M. Nafi |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Cheng, Ningya Schultz, Craig A. Toksoz, M. Nafi |
| author_sort | Cheng, Ningya |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T14:19:25Z |
| format | Technical Report |
| id | mit-1721.1/75257 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:19:25Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/752572019-04-10T18:05:19Z A Comparison Of Scattering From 2-D And 3-D Rough Interface Cheng, Ningya Schultz, Craig A. Toksoz, M. Nafi Massachusetts Institute of Technology. Earth Resources Laboratory Cheng, Ningya Toksoz, M. Nafi 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. ERL/nCUBE Geophysical Center for Parallel Processing United States. Air Force Office of Scientific Research (Contract F49620-941-0282) 2012-12-05T20:40:01Z 2012-12-05T20:40:01Z 1995 Technical Report http://hdl.handle.net/1721.1/75257 Earth Resources Laboratory Industry Consortia Annual Report;1995-10 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Cheng, Ningya Schultz, Craig A. Toksoz, M. Nafi A Comparison Of Scattering From 2-D And 3-D Rough Interface |
| title | A Comparison Of Scattering From 2-D And 3-D Rough Interface |
| title_full | A Comparison Of Scattering From 2-D And 3-D Rough Interface |
| title_fullStr | A Comparison Of Scattering From 2-D And 3-D Rough Interface |
| title_full_unstemmed | A Comparison Of Scattering From 2-D And 3-D Rough Interface |
| title_short | A Comparison Of Scattering From 2-D And 3-D Rough Interface |
| title_sort | comparison of scattering from 2 d and 3 d rough interface |
| url | http://hdl.handle.net/1721.1/75257 |
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