Seismo‐acoustic propagation near low‐shear speed poroelastic ocean sediments using a hybrid parabolic equation solution.

2010 ◽  
Vol 127 (3) ◽  
pp. 1962-1962
Author(s):  
Jon M. Collis
Keyword(s):  
Parabolic Equation ◽  
Acoustic Propagation ◽  
Equation Solution ◽  
Shear Speed ◽  
Low Shear

Wide-Angle Parabolic Equation Solution of Ocean Acoustic Propagation with Lossy Penetrable Bottom

1999 ◽  
Vol 38 (Part 1, No. 5B) ◽  
pp. 3361-3365 ◽  
Author(s):  
Masuya Hada ◽  
Taro Fujii ◽  
Takenobu Tsuchiya ◽  
Tetsuo Anada ◽  
Nobuyuki Endoh
Keyword(s):  
Parabolic Equation ◽  
Acoustic Propagation ◽  
Wide Angle ◽  
Equation Solution

scholarly journals Parabolic Equation Modeling of Scholte Waves and Other Effects Along Sloping Fluid-Solid Interfaces

2021 ◽  
pp. 2050025
Author(s):  
Michael D. Collins ◽  
Adith Ramamurti
Keyword(s):  
Parabolic Equation ◽  
Fluid Layer ◽  
Solid Material ◽  
Single Scattering ◽  
Equation Modeling ◽  
Wide Range ◽  
Scholte Waves ◽  
Scholte Wave ◽  
Shear Speed ◽  
Low Shear

Several methods for handling sloping fluid–solid interfaces with the elastic parabolic equation are tested. A single-scattering approach that is modified for the fluid–solid case is accurate for some problems but breaks down when the contrast across the interface is sufficiently large and when there is a Scholte wave. An approximate condition for conserving energy breaks down when a Scholte wave propagates along a sloping interface but otherwise performs well for a large class of problems involving gradual slopes, a wide range of sediment parameters, and ice cover. An approach based on treating part of the fluid layer as a solid with low shear speed is developed and found to handle Scholte waves and a wide range of sediment parameters accurately, but this approach needs further development. The variable rotated parabolic equation is not effective for problems involving frequent or continuous changes in slope, but it provides a high level of accuracy for most of the test cases, which have regions of constant slope. Approaches based on a coordinate mapping and on using a film of solid material with low shear speed on the rises of the stair steps that approximate a sloping interface are also tested and found to produce accurate results for some cases.

Seismo-acoustic propagation near thin and low-shear speed ocean bottom sediments

2011 ◽  
Vol 130 (4) ◽  
pp. 2529-2529
Author(s):  
Jon M. Collis ◽  
Adam M. Metzler ◽  
Paden Reitz ◽  
Rezwanur Rahman
Keyword(s):  
Bottom Sediments ◽  
Acoustic Propagation ◽  
Ocean Bottom ◽  
Shear Speed ◽  
Low Shear

Seismo-acoustic propagation near thin and low-shear speed ocean bottom sediments

2012 ◽  
Vol 132 (3) ◽  
pp. 1973-1973
Author(s):  
Jon M. Collis ◽  
Adam M. Metzler ◽  
William L. Siegmann
Keyword(s):  
Bottom Sediments ◽  
Acoustic Propagation ◽  
Ocean Bottom ◽  
Shear Speed ◽  
Low Shear

Modeling low-frequency seismo-acoustic propagation in the Arctic using a parabolic equation solution

2012 ◽  
Vol 132 (3) ◽  
pp. 1974-1974
Author(s):  
Adam M. Metzler ◽  
Jon M. Collis ◽  
William L. Siegmann
Keyword(s):  
Parabolic Equation ◽  
Low Frequency ◽  
Acoustic Propagation ◽  
The Arctic ◽  
Equation Solution
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