Volume 37, Number 4, August 2019
|Page(s)||724 - 729|
|Published online||23 September 2019|
On the Dispersive Characteristics of Shallow Water Seismic Waves Excited by Air Gun Sound Source in Shallow Water
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
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
关键字 : 气枪声源 / 浅海地震波 / 频散 / 表面波 / τ-p变换法
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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