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• W2080498350 endingPage "687" @default.
• W2080498350 startingPage "675" @default.
• W2080498350 abstract "Abstract Ocean bottom is considered as a plane interface between non-viscous liquid and anisotropic dissipative poroelastic solid. The dissipation comes from the viscosity of pore-fluid as well as the anelasticity of the porous frame. Biot’s theory is used to derive a system of modified Christoffel equations for the propagation of plane harmonic waves in a porous medium. The non-trivial solution of this system is ensured by a determinantal equation. This equation is solved into a polynomial equation of degree eight, whose roots represent the vertical slowness values for the waves propagating upward and downward in a porous medium. The eight, numerically obtained, slowness values are identified with the four waves propagating towards (or away from) the boundary in the porous medium. Incidence of acoustic wave through the liquid at the interface results in its reflection and the refraction of four attenuating waves in the poroelastic medium. The energy partition among the reflected and refracted waves is calculated at the interface. Conservation of energy is obtained except in the case of partially opened surface pores of the porous medium. Energy refracted to the dissipative porous medium is expressed through an energy matrix. The four diagonal elements of this matrix represent the energy shares of the four inhomogeneous waves and the sum of all the off-diagonal elements of this matrix represents the interaction energy. Few significant results are extracted from the observations in the numerical examples studied. These results represent the effect of anisotropic symmetries, anelasticity, wave-frequency, opening, configuration and flow-impedance of pores, on the energy shares of reflected and refracted waves." @default.
• W2080498350 created "2016-06-24" @default.
• W2080498350 creator A5009476099 @default.
• W2080498350 creator A5047716083 @default.
• W2080498350 date "2009-06-01" @default.
• W2080498350 modified "2023-09-24" @default.
• W2080498350 title "Reflection and refraction of acoustic waves at poroelastic ocean bed" @default.
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• W2080498350 doi "https://doi.org/10.1186/bf03353176" @default.
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