峡谷和斜坡区时变三维声传播的计算研究

T. Duda, Ying-Tsong Lin, A. Newhall, W. G. Zhang, J. Lynch
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引用次数: 4

摘要

将三维声传播代码与区域海洋模型的场相结合,研究了现实环境中时变声传播行为。由此产生的四维声场在这里进行了检验。迄今为止用于此目的的区域模型具有调用流体静力学近似和具有声波波长100倍的空间分辨率的局限性。这里选择的分析例子来自大陆架断裂(大陆架边缘)附近的峡谷和斜坡地区。在这一地区,水深对流动的影响以及与海底高度可变的声音相互作用产生了复杂的声场行为。声场的某些特征受测深控制,在时间上是稳定的。其他特征受水柱变化和波动的支配。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Computational studies of time-varying three-dimensional acoustic propagation in canyon and slope regions
A three-dimensional acoustic propagation code is united with fields from a regional ocean model to study time-varying acoustic propagation behavior in realistic environments. The resultant four-dimensional acoustic fields are examined here. The regional models used to date for this purpose have the limitations of invoking the hydrostatic approximation and having spatial resolution that is of order one-hundred times the acoustic wavelength. Examples chosen for analysis here are from canyon and slope regions near the continental shelf break (shelf edge). In this area, bathymetric effects on flow and highly variable sound interaction with the seafloor work to generate complex acoustic field behavior. Some features of sound fields are governed by the bathymetry and are steady in time. Other features are governed by variations on the water column and fluctuate.
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