Improving Scholte-Wave Vibration Signal Recognition Based on Polarization Characteristics in Coastal Waters

Zhao, Shuang; Zhang, Jian; Wang, Zeliang; Huang, Hongwei; Hu, Jiayu; Guo, Chuwen

doi:10.2112/jcoastres-d-19-00096.1

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…In order to explore a new method of underwater target detection, shallow sea seismic waves have attracted extensive attention. Scholte [1] conducted a large number of shallow sea acoustic propagation experiments after the concept of Scholte wave was proposed, and pointed out the possibility of using shallow water seismic wave to realize underwater target detection, recognition and tracking for the first time [2].Since then, scholars from various countries have carried out a large number of theoretical [3,4], numerical [5,6] (Finite difference method and Finite element method) and experimental [7,8] studies on shallow sea seismic waves, and used shallow sea seismic waves in the fields of target detection, geological exploration and others. After a long and in-depth study by scholars from various countries, it is concluded that shallow sea seismic wave has the following advantages.…”

Section: Introductionmentioning

confidence: 99%

Study on propagation characteristics of Scholte wave in shallow sea at non-horizontal underwater interface

Zhao¹,

Meng²,

Gu³

et al. 2022

J. vibroeng.

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Theoretical and simulation studies are carried out to study the propagation characteristics of Scholte waves in non-horizontal underwater interface of shallow sea. The dispersion and polarization characteristics of Scholte waves in horizontal layered underwater interface are analyzed by using wave theory and staggered grid finite difference method. The effectiveness of the method used in this paper is proved from the perspective of theory and simulation. The propagation characteristics and polarization characteristics of Scholte waves in non-horizontal underwater interface are also analyzed. At the wedge-shaped underwater interface, the particle trajectory of Scholte wave is related to the angle between the propagation direction and the underwater interface, and with the increase of the angle, the deflection angle of the particle trajectory increases. At the bulged underwater interface, the particle trajectory of seismic wave has nothing to do with the propagation direction and the bulged underwater interface, but the bulged underwater interface has a great influence on the amplitude of seismic wave. The research results are of great significance to underwater target detection and geological exploration.

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Section: Introductionmentioning

confidence: 99%

Study on propagation characteristics of Scholte wave in shallow sea at non-horizontal underwater interface

Zhao¹,

Meng²,

Gu³

et al. 2022

J. vibroeng.

Self Cite

View full text Add to dashboard Cite

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Numerical Modeling of Scholte Wave in Acoustic-Elastic Coupled TTI Anisotropic Media

Chen,

Wang

2024

Applied Sciences

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Numerical modeling of acoustic-elastic media is helpful for seismic exploration in the deepwater environment. We propose an algorithm based on the staggered grid finite difference to simulate wave propagation in the interface between fluid and transversely isotropic media, where the interface does not need to consider the boundary condition. We also derive the stability conditions of the proposed method. Scholte waves, which are generated at the seafloor, exhibit distinctly different propagation behaviors than body waves in ocean-bottom seismograms. Numerical examples are used to characterize the wavefield of Scholte waves and discuss the relationship between travel time and the Thomsen parameters. Thomsen parameters are assigned clear physical meanings, and the magnitude of their values directly indicates the strength of the anisotropy in the media. Numerical results show that the velocity of the Scholte wave is positively correlated with ε and negatively correlated with δ. And the curve of the arrival time of the Scholte wave as a whole is sinusoidal and has no symmetry in inclination. The velocity of the Scholte wave in azimuth is positively related to the polar angle. The energy of the Scholte wave is negatively correlated with the distance from the source to the fluid-solid interface. The above results provide a basis for studying oceanic Scholte waves and are beneficial for utilizing the information provided by Scholte waves.

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Improving Scholte-Wave Vibration Signal Recognition Based on Polarization Characteristics in Coastal Waters

Cited by 2 publications

References 22 publications

Study on propagation characteristics of Scholte wave in shallow sea at non-horizontal underwater interface

Study on propagation characteristics of Scholte wave in shallow sea at non-horizontal underwater interface

Numerical Modeling of Scholte Wave in Acoustic-Elastic Coupled TTI Anisotropic Media

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