Broadband transmission losses and time dispersion maps from time-domain numerical simulations in ocean acoustics
Abstract
In this letter, a procedure for the calculation of transmission loss maps from numerical simulations in the time domain is presented. It can be generalized to arbitrary time sequences and to elastic media and provides an insight into how energy spreads into a complex configuration. In addition, time dispersion maps can be generated. These maps provide additional information on how energy is distributed over time. Transmission loss and time dispersion maps are generated at a negligible additional computational cost. To illustrate the type of transmission loss maps that can be produced by the time-domain method, the problem of the classical two-dimensional upslope wedge with a fluid bottom is addressed. The results obtained are compared to those obtained previously based on a parabolic equation. Then, for the same configuration, maps for an elastic bottom and maps for non-monochromatic signals are computed.
Additional Information
© 2018 Acoustical Society of America. We are grateful to Jean-Pierre Vilotte, Oleg A. Godin, and Raphaël F. Garcia for fruitful discussion. We also thank associate editor Paul E. Barbone and two anonymous reviewers for useful comments that improved the manuscript. The Ph.D. grant of A.B. was awarded by ENS Paris Saclay, France. This work was granted access to the French HPC resources of TGCC under allocation #gen7165 and #mam0305 and of CINES under allocation #A0020407165 and #A0030410305, both made by GENCI, and of the Aix-Marseille Supercomputing Mesocenter under allocation #b025. We gratefully acknowledge the support of NVIDIA Corporation with the donation of hardware for this research through their Hardware Grant Request program.Attached Files
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Additional details
- Eprint ID
- 90039
- Resolver ID
- CaltechAUTHORS:20180927-125042194
- École normale supérieure Paris-Saclay
- gen7165
- Commissariat à l'Energie Atomique (CEA)
- mam0305
- Commissariat à l'Energie Atomique (CEA)
- A0020407165
- Centre Informatique National de l'Enseignement Supérieur (CINES)
- A0030410305
- Centre Informatique National de l'Enseignement Supérieur (CINES)
- b025
- Aix-Marseille Supercomputing Mesocenter
- Ministry of Higher Education and Research (France)
- NVIDIA Corporation
- Created
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2018-09-27Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field