Editorial Type:
Article
Article Type:
Research Article

Flow-Dependent Modeling of Acoustic Propagation Based on the DG-FEM Method

Zichen Wang aSchool of Marine Science and Technology, Tianjin University, Tianjin, China

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Jian Xu aSchool of Marine Science and Technology, Tianjin University, Tianjin, China

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Xuefeng Zhang aSchool of Marine Science and Technology, Tianjin University, Tianjin, China

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Can Lu aSchool of Marine Science and Technology, Tianjin University, Tianjin, China

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Kangkang Jin aSchool of Marine Science and Technology, Tianjin University, Tianjin, China

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Yinquan Zhang bKey Laboratory of Marine Environmental Information Technology, Tianjin, China

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Online Publication:
01 Oct 2021
Print Publication:
01 Oct 2021
DOI:
https://doi.org/10.1175/JTECH-D-21-0001.1
Page(s):
1823–1832
Restricted access

Abstract

This paper proposes a two-dimensional underwater sound propagation model using the discontinuous Galerkin finite-element method (DG-FEM) to investigate the influence of current on sound propagation. The acoustic field is calculated by the convected wave equation with the current speed parameter. Based on the current speed data from an assimilation model, a two-dimensional coupled acoustic propagation model in the Fram Strait water area is established to observe the variability in propagation loss under different seasonal velocities in the real ocean environment. The transmission loss and signal time structure are examined. The results obtained in different source frequencies are also compared. It appears that the current velocity, time, and range variation all have an effect on underwater sound propagation.

© 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

Corresponding author: Jian Xu, jian.xu@tju.edu.cn

Abstract

This paper proposes a two-dimensional underwater sound propagation model using the discontinuous Galerkin finite-element method (DG-FEM) to investigate the influence of current on sound propagation. The acoustic field is calculated by the convected wave equation with the current speed parameter. Based on the current speed data from an assimilation model, a two-dimensional coupled acoustic propagation model in the Fram Strait water area is established to observe the variability in propagation loss under different seasonal velocities in the real ocean environment. The transmission loss and signal time structure are examined. The results obtained in different source frequencies are also compared. It appears that the current velocity, time, and range variation all have an effect on underwater sound propagation.

© 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

Corresponding author: Jian Xu, jian.xu@tju.edu.cn
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