具有距离相关声速波动的恒深海洋的有效模态耦合计算

IF 1.3 3区物理与天体物理 Q3 ACOUSTICS

Journal of Theoretical and Computational Acoustics Pub Date : 2022-06-17 DOI:10.1142/s2591728521500249

Jungyong Park, Haesang Yang

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引用次数: 0

摘要

本文提出了一个具有距离相关声速波动的等深海洋中有效耦合模矩阵计算准则。通常的步进耦合模式需要很高的计算能力来计算距离段各接口处的模式耦合矩阵。为降低计算复杂度，从微扰理论出发，导出了对模耦合矩阵影响较大的模对的选择准则。该准则确定了模态拍波数的有效范围。数值算例表明，与完全计算模态耦合矩阵相比，采用该准则计算的计算量显著降低，同时保持了模态耦合矩阵和声场的精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Efficient Mode-Coupling Calculation for Constant Depth Ocean with Range-Dependent Sound–Speed Fluctuation

In this paper, a criterion for efficient coupled-mode matrix calculation in a constant depth ocean with range-dependent sound–speed fluctuation is proposed. The usual stepwise coupled mode requires high computational power to calculate the mode-coupling matrix at each interface of the range segment. To reduce the computational complexity, the criterion for selecting appropriate mode pairs, which strongly affects the mode-coupling matrix, is derived from perturbation theory. This criterion determines the effective range of the modal beat wavenumber. Numerical examples indicate that compared with the full calculation of the mode-coupling matrix, for the calculation using the proposed criterion, the computational complexity is significantly reduced, while the accuracies of the mode-coupling matrix and acoustic field are maintained.

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来源期刊

Journal of Theoretical and Computational Acoustics Computer Science-Computer Science Applications

CiteScore

2.90

自引率

42.10%

发文量

期刊介绍： The aim of this journal is to provide an international forum for the dissemination of the state-of-the-art information in the field of Computational Acoustics. Topics covered by this journal include research and tutorial contributions in OCEAN ACOUSTICS (a subject of active research in relation with sonar detection and the design of noiseless ships), SEISMO-ACOUSTICS (of concern to earthquake science and engineering, and also to those doing underground prospection like searching for petroleum), AEROACOUSTICS (which includes the analysis of noise created by aircraft), COMPUTATIONAL METHODS, and SUPERCOMPUTING. In addition to the traditional issues and problems in computational methods, the journal also considers theoretical research acoustics papers which lead to large-scale scientific computations.