The simulation of underwater acoustic propagation with the horizontal changes of sound speed profiles

2016 IEEE/OES China Ocean Acoustics (COA) Pub Date : 1900-01-01 DOI:10.1109/COA.2016.7535738

Jia-xuan Yang, Lin He, C. Shuai

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引用次数: 3

Abstract

In the simulation of underwater acoustic propagation, sound speed is usually characterized by the vertical distribution of the sound speed profile (SSP), but it ignores lateral variation. This paper carried out simulation on constant SSP, negative and positive gradient profile, and real sound speed profiles (SSPs), concerning a Gulf Stream scenario, and by using Bellhop model. The characteristics of underwater acoustic propagation in the horizontal direction are discussed. The results show that the changes of sound velocity in the horizontal direction have a certain effect on underwater sound propagation. With the horizontal sound speed increasing for the steady SSPs, the number of eigenrays increase, and the transmission loss and the arrival times decrease. Conversely, the number of eigenrays decrease, and the transmission loss and the arrival times increase. With the horizontal changes of the unsteady SSPs, underwater acoustic propagation is basically followed by this law, but the transmission loss may change suddenly in some cases. It has a certain reference value for underwater acoustic modeling. Further work will be discussed and analyzed in the future.

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水声传播随声速分布水平变化的模拟

在水声传播模拟中，声速通常以声速廓线的垂直分布来表征，而忽略了声速廓线的横向变化。本文采用Bellhop模型，对墨西哥湾流情景下的恒定声速曲线、负、正梯度曲线和实声速曲线进行了模拟。讨论了水声在水平方向上的传播特性。结果表明，声速在水平方向上的变化对水声传播有一定的影响。随着水平声速的增加，特征射线的数量增加，传输损失和到达次数减少。相反，特征光的数量减少，传输损耗和到达次数增加。随着非定常ssp的水平变化，水声传播基本遵循这一规律，但在某些情况下，传输损失可能会突然发生变化。对水声建模具有一定的参考价值。进一步的工作将在未来进行讨论和分析。

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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2016 IEEE/OES China Ocean Acoustics (COA)

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