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论文:2019,Vol:37,Issue(4):724-729 |
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引用本文： |
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刁爱民, 程广利, 王泽明. 气枪声源激发的浅海地震波频散特性研究[J]. 西北工业大学学报 |
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DIAO Aimin, CHENG Guangli, WANG Zeming. On the Dispersive Characteristics of Shallow Water Seismic Waves Excited by Air Gun Sound Source in Shallow Water[J]. Northwestern polytechnical university |
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| 气枪声源激发的浅海地震波频散特性研究 |
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| 刁爱民1, 程广利2, 王泽明2,3 |
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1. 海军工程大学 船舶与海洋学院, 湖北 武汉 430033;
2. 海军工程大学 电子工程学院, 湖北 武汉 430033;
3. 南部战区海军参谋部, 广东 湛江 524000 |
| 摘要: |
| 为了研究由浅海中声源激发的海底地震波主要波动成分的频散特性，首先基于波动方程对液-固界面处的声场进行了推导，证明纵波和横波不具有频散特性，而表面波具有正常频散特性。随后基于高阶交错网格有限差分法，对气枪声源激发的液-固界面处的声场进行了数值仿真，通过分析仿真数据观察到表面波的频散现象，验证了理论分析结果；最后基于τ-p变换对海试数据处理与分析，精细提取了海底表面波的频散曲线。 |
| 关键词:
气枪声源
浅海地震波
频散
表面波
τ-p变换法
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| On the Dispersive Characteristics of Shallow Water Seismic Waves Excited by Air Gun Sound Source in Shallow Water |
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| DIAO Aimin1, CHENG Guangli2, WANG Zeming2,3 |
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1. College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China;
2. College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China;
3. Navy Staff Office of Southern Theater Command, Zhanjiang 524000, China |
| Abstract: |
| In order to study the dispersion characteristics of seabed seismic waves excited by acoustic sources in shallow water, the sound field at liquid-solid interface is derived based on the wave equation firstly, which results demonstrate that the longitudinal wave and transversal wave are not dispersive, while the Scholte wave is normal dispersive. Then, the numerical simulation is carried out on the sound field at the liquid-solid interface excited by the air gun sound source based on high-order staggered grid finite difference method, which results demonstrate that the dispersion phenomenon of Scholte waves is observed and the theoretical analysis results were verified. Finally, the data of experiment in the sea are analyzed based on the transformation, and the dispersion curve of Scholte wave is finely extracted. |
| Key words:
air gun sound source
seismic waves in the shallow water
dispersion
scholte wave
transformation method
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| 收稿日期: 2018-09-02
修回日期:
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| DOI: 10.1051/jnwpu/20193740724 |
| 基金项目: 国防科技创新特区项目支持（ZT-001-002-10）资助 |
| 通讯作者: 程广利(1976-),海军工程大学教授,主要从事水声工程研究。E-mail:sonarcgl@126.com
Email：sonarcgl@126.com |
| 作者简介: 刁爱民(1966-),海军工程大学教授、硕士生导师,主要从事海洋工程研究。
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