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Broadband transmission losses and time dispersion maps from time-domain numerical simulations in ocean acoustics

Bottero, Alexis and Cristini, Paul and Komatitsch, Dimitri and Brissaud, Quentin (2018) Broadband transmission losses and time dispersion maps from time-domain numerical simulations in ocean acoustics. Journal of the Acoustical Society of America, 144 (3). EL222-EL228. ISSN 0001-4966. https://resolver.caltech.edu/CaltechAUTHORS:20180927-125042194

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1121/1.5055787DOIArticle
ORCID:
AuthorORCID
Brissaud, Quentin0000-0001-8189-4699
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.
Funders:
Funding AgencyGrant Number
École normale supérieure Paris-SaclayUNSPECIFIED
Commissariat à l’Energie Atomique (CEA)gen7165
Commissariat à l’Energie Atomique (CEA)mam0305
Centre Informatique National de l'Enseignement Supérieur (CINES)A0020407165
Centre Informatique National de l'Enseignement Supérieur (CINES)A0030410305
Aix-Marseille Supercomputing Mesocenterb025
Ministry of Higher Education and Research (France)UNSPECIFIED
NVIDIA CorporationUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20180927-125042194
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180927-125042194
Official Citation:Broadband transmission losses and time dispersion maps from time-domain numerical simulations in ocean acoustics. Alexis Bottero, Paul Cristini, Dimitri Komatitsch, and Quentin Brissaud. The Journal of the Acoustical Society of America 2018. 144:3, EL222-EL228
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90039
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:27 Sep 2018 20:08
Last Modified:09 Mar 2020 13:18

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