Analytical study of the reflection and transmission coefficient of the submarine interface

Zhang, G.; Hao, C.; Yao, C.

doi:10.1007/s11600-018-0153-y

Artykuł - szczegóły

Tytuł artykułu

Analytical study of the reflection and transmission coefficient of the submarine interface

Autorzy

Zhang G. , Hao C. , Yao C.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-018-0153-y

Warianty tytułu

Języki publikacji

Abstrakty

The analytical study of the reflection and transmission coefficient of the seafloor interface is essential for the characterization of the ocean bottom in marine seismic exploration. Based on the boundary conditions of the seafloor interface, the analytical expression of the reflection and transmission coefficient at the submarine interface is derived in this study by using the steady-state wave solution of the elastic wave in a homogeneous, isotropic medium. With this analytical expression, the characteristics of the reflection and transmission coefficient at the submarine interface are analysed and discussed using critical angles. The results show that the change in the reflection and transmission coefficient with the incidence angle presents a ‘‘segmented’’ characteristic, in which the critical angle is the dividing point. The amplitude value and phase angle of the coefficient at the submarine interface change dramatically at the critical angle, which is related to the P- and S-wave velocities in the seabed layer. Compared with the stiff seabed, the soft seabed has a larger P-wave critical angle and an absence of the converted S-wave critical angle, owing to the low P- and S-wave velocities in the solid seabed layer. By analysing and discussing the special changes that occur in the coefficient values at the critical angle, the reflection and transmission characteristics of the different incident angles are obtained. Synthetic models of both stiff and soft seafloors are provided in this study to verify the analytical results. Finally, we compared our synthetic results with real data from the Gulf of Mexico, which enabled the validation of our conclusions.

Słowa kluczowe

reflection coefficient transmission coefficient stiff seabed layer soft seabed layer critical angle analytical study submarine interface

współczynnik odbicia współczynnik transmisji sztywna warstwa dna morskiego miękka warstwa dna morskiego kąt krytyczny badanie analityczne

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2018

Tom

Vol. 66, no. 4

Strony

449--460

Opis fizyczny

Bibliogr. 40 poz.

Twórcy

autor

Zhang G.

glzhang@mail.iggcas.ac.cn

State Key Laboratory of Earthquake Dynamics, Institute of Geology, Earthquake Administration China, Beijing, China
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 10029, China

autor

Hao C.

State Key Laboratory of Earthquake Dynamics, Institute of Geology, Earthquake Administration China, Beijing, China

autor

Yao C.

State Key Laboratory of Earthquake Dynamics, Institute of Geology, Earthquake Administration China, Beijing, China

Bibliografia

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Bibliografia

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