Acoustic parabolic equation model with a directional source

IF 0.2 Q4 ACOUSTICS
Keunhwa Lee
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引用次数: 0

Abstract

: The acoustic parabolic equation method in the ocean is an efficient technique to calculate the acoustic field in the range-dependent environment, emanating from a point source. However, we often need to use the directional source with a main beam in the practical problem. In this paper, we present two methods to implement the directional source in the acoustic parabolic equation code easily. One is simply to filter the Delta function idealized as an omni-directional point source. Another method is based on the rational filtering of the self-starter solution. It has a limitation not to separate the up-going and the down-going wave for the depth, but would be useful in implementing the mode propagation. Numerical examples for validation are given in the Pekeris environment and the deep sea environment
有方向性声源的声波抛物方程模型
海洋声抛物方程法是一种有效的计算距离相关环境中由点源发出的声场的方法。然而,在实际问题中,我们经常需要使用带主波束的定向源。本文提出了两种易于实现声抛物方程代码中定向源的方法。一种是简单地过滤作为全向点源的理想函数。另一种方法是基于自启动解的理性滤波。虽然不能对深度进行上行波和下行波的分离,但对实现模态传播是有帮助的。给出了Pekeris环境和深海环境下的数值算例进行验证。
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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来源期刊
CiteScore
0.60
自引率
50.00%
发文量
1
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