Scholte waves on fluid-solid interfaces by means of an integral formulation

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Abstract

The present work shows the propagation of Scholte interface waves at the boundary of a fluid in contact with an elastic solid, for a broad range of solid materials. It has been demonstrated that by an analysis of diffracted waves in a fluid it is possible to infer the mechanical properties of the elastic solid medium, specifically, its propagation velocities. For this purpose, the diffracted wave field of pressures and displacements, due to an initial wave of pressure in the fluid, are expressed using boundary integral representations, which satisfy the equation of motion. The source in the fluid is represented by a Hankel's function of second kind and zero order. The solution to this wave propagation problem is obtained by means of the Indirect Boundary Element Method, which is equivalent to the well-known Somigliana representation theorem. The validation of the results is carried out by using the Discrete Wave Number Method and the Spectral Element Method. Firstly, we show spectra of pressures that illustrate the behavior of the fluid for each solid material considered, then, we apply the Fast Fourier Transform to show results in time domain. Snapshots to exemplify the emergence of Scholte's waves are also included.

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APA

Carbajal-Romero, M., Flores-Guzmán, N., Flores-Mendez, E., Núñez-Farfán, J., Olivera-Villaseñor, E., & Sánchez-Sesma, F. J. (2013). Scholte waves on fluid-solid interfaces by means of an integral formulation. Geofisica Internacional, 52(1), 21–30. https://doi.org/10.1016/S0016-7169(13)71459-4

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