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1. 91388部队, 广东 湛江 524002
2. 海军工程大学, 湖北 武汉 430033
Received:22 July 2024,
Published Online:28 August 2025,
Published:31 August 2025
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Xiayun LUO, Xinning CHEN, Bao LIU. Study on Airy Phase of Scholte Wave in Shallow Water[J]. Acta Armamentarii, 2025, 46(8): 240605.
Xiayun LUO, Xinning CHEN, Bao LIU. Study on Airy Phase of Scholte Wave in Shallow Water[J]. Acta Armamentarii, 2025, 46(8): 240605. DOI: 10.12382/bgxb.2024.0605.
为研究Scholte波Airy相的形成机理
理清其特征及变化规律
基于浅海半无限弹性海底声场模型
推导求解脉冲声源激发Scholte波的波场表达式。利用高阶交错网格有限差分算法对脉冲声源激发Scholte波进行数值仿真
得到Airy波幅值与传播距离之间的关系。理论研究结果表明:Scholte波因频散会使其群速度出现一个极小值
导致脉冲信号在传播过程中出现Airy波
其振幅与
r
-5
/
6
(
r
为传播距离)呈正比。开展湖上气枪声源激发Scholte波试验
利用滑动窗分析法对试验数据展开分析。试验结果表明:12Hz以下
频段明显存在频散现象
频率高于12Hz后
随着频率的增加群速度基本保持不变
同时群速度随频率的增加呈先减小后增大的变化规律
再现并印证了理论研究中Scholte波群速度的频散关系。
The formation mechanism of Airy phase of Scholte wave is studied to clarify its characteristics and variation laws.The wave field expression of Scholte wave excited by pulse sound source are derived based on the shallow water semi-infinite elastic seabed sound field model.The high-order staggered grid finite difference algorithm is used to simulate the Scholte wave excited by the pulse sound source.The relationship between the amplitude of Airy wave and the propagation distance was obtained through simulation.The results show that the frequency dispersion of Scholte wave can cause a minimum group velocity
leading to the appearance of Airy wave during the propagation of the pulse signal
with an amplitude being proportional to
r
-5
/
6
.A Scholte wave experiment excited by an airgun sound source on the lake is made
and the moving window analysis method is used to analyze the experiment data.The analyzed results show that there is obvious frequency dispersion phenomenon in the frequency band below 12Hz.When the frequency is higher than 12Hz
the group velocity remaines basically unchanged with the increase in frequency.At the same time
the group velocity showes a first decreasing and then increasing trend with the increase in frequency
reproducing and confirming the dispersion relationship of Scholte wave group velocity in theoretical research.
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