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Shear wave velocity inversion based on Scholte waves for a fully saturated seabed
https://orcid.org/0000-0002-0779-3598
Abstract As a non-destructive and convenient method, Scholte waves inversion method has been widely used in various engineering applications. However, previous inversion methods treated the seabed sediments as a fully elastic medium, and ignored the porous nature of the sediment. In this paper, a state-of-art inversion model of shear wave velocity, which takes into account the porous property of the seabed, is established based on Bloch's theorems and Biot's theory. Then, the validity of the results is established and the influences of porosity and permeability coefficient of seabed soil are discussed in detail. Finally, an inversion platform using a Python environment is built, and Differential Evolution algorithm and Bayesian approach are employed to obtain the shear velocity profile of the seafloor in the northern North Sea. The calculated results based on the proposed model are highly consistent with the in-situ measurements in the shallow seabed compared to those calculated by the elastic model. This suggests that the influence of porous medium properties on shear wave velocity should be carefully considered for more accurate marine geological surveys.
Highlights a novel inversion model of shear wave velocity incorporating the porous properties of seabed sediments is established. this study quantifies the impacts of porosity and permeability coefficients on the dispersion curves. the calculated shear wave velocities exhibit a high level of agreement with the in-situ measurements.
Shear wave velocity inversion based on Scholte waves for a fully saturated seabed
https://orcid.org/0000-0002-0779-3598
Abstract As a non-destructive and convenient method, Scholte waves inversion method has been widely used in various engineering applications. However, previous inversion methods treated the seabed sediments as a fully elastic medium, and ignored the porous nature of the sediment. In this paper, a state-of-art inversion model of shear wave velocity, which takes into account the porous property of the seabed, is established based on Bloch's theorems and Biot's theory. Then, the validity of the results is established and the influences of porosity and permeability coefficient of seabed soil are discussed in detail. Finally, an inversion platform using a Python environment is built, and Differential Evolution algorithm and Bayesian approach are employed to obtain the shear velocity profile of the seafloor in the northern North Sea. The calculated results based on the proposed model are highly consistent with the in-situ measurements in the shallow seabed compared to those calculated by the elastic model. This suggests that the influence of porous medium properties on shear wave velocity should be carefully considered for more accurate marine geological surveys.
Highlights a novel inversion model of shear wave velocity incorporating the porous properties of seabed sediments is established. this study quantifies the impacts of porosity and permeability coefficients on the dispersion curves. the calculated shear wave velocities exhibit a high level of agreement with the in-situ measurements.
Shear wave velocity inversion based on Scholte waves for a fully saturated seabed
https://orcid.org/0000-0002-0779-3598
Abstract As a non-destructive and convenient method, Scholte waves inversion method has been widely used in various engineering applications. However, previous inversion methods treated the seabed sediments as a fully elastic medium, and ignored the porous nature of the sediment. In this paper, a state-of-art inversion model of shear wave velocity, which takes into account the porous property of the seabed, is established based on Bloch's theorems and Biot's theory. Then, the validity of the results is established and the influences of porosity and permeability coefficient of seabed soil are discussed in detail. Finally, an inversion platform using a Python environment is built, and Differential Evolution algorithm and Bayesian approach are employed to obtain the shear velocity profile of the seafloor in the northern North Sea. The calculated results based on the proposed model are highly consistent with the in-situ measurements in the shallow seabed compared to those calculated by the elastic model. This suggests that the influence of porous medium properties on shear wave velocity should be carefully considered for more accurate marine geological surveys.
Highlights a novel inversion model of shear wave velocity incorporating the porous properties of seabed sediments is established. this study quantifies the impacts of porosity and permeability coefficients on the dispersion curves. the calculated shear wave velocities exhibit a high level of agreement with the in-situ measurements.
Shear wave velocity inversion based on Scholte waves for a fully saturated seabed
Sun, Xingye (author) / Guo, Zhen (author) / Rui, Shengjie (author) / Dou, Yuzhe (author)
2023-09-04
Article (Journal)
Electronic Resource
English
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