TY - JOUR
T1 - Modelado numérico para estudiar interfases fluido-sólidas ante excitaciones dinámicas
AU - Flores-Méndez, E.
AU - Carbajal-Romero, M.
AU - Flores-Guzmán, N.
AU - Núñez-Farfán, J.
PY - 2013
Y1 - 2013
N2 - This work shows the wave propagation in fluid-solid interfaces due to dynamic excitations, such interface waves are known as Scholte's waves. We studied a wide range of elastic solid materials used in engineering. The interface connects an acoustic medium (fluid) and another solid. It has been shown that by means of an analysis of diffracted waves in a fluid, it is possible to deduce the mechanical characteristics of the solid medium, specifically, its propagation velocities. For this purpose, the diffracted field of pressures and displacements, due to an initial pressure in the fluid, are expressed using boundary integral representations, which satisfy the equation of motion. The initial pressure in the fluid is represented by a Hankel's function of second kind and zero order. The solution to this problem of wave propagation is obtained by means of the Indirect Boundary Element Method, which is equivalent to the well-known Somigliana's representation theorem. The validation of the results was performed by means of the Discrete Wave Number Method. Firstly, spectra of pressures to illustrate the behavior of the fluid for each solid material considered are included, then, the Fast Fourier Transform algorithm to display the results in the time domain is applied, where the emergence of Scholte's waves and the amount of energy that they carry are highlighted.
AB - This work shows the wave propagation in fluid-solid interfaces due to dynamic excitations, such interface waves are known as Scholte's waves. We studied a wide range of elastic solid materials used in engineering. The interface connects an acoustic medium (fluid) and another solid. It has been shown that by means of an analysis of diffracted waves in a fluid, it is possible to deduce the mechanical characteristics of the solid medium, specifically, its propagation velocities. For this purpose, the diffracted field of pressures and displacements, due to an initial pressure in the fluid, are expressed using boundary integral representations, which satisfy the equation of motion. The initial pressure in the fluid is represented by a Hankel's function of second kind and zero order. The solution to this problem of wave propagation is obtained by means of the Indirect Boundary Element Method, which is equivalent to the well-known Somigliana's representation theorem. The validation of the results was performed by means of the Discrete Wave Number Method. Firstly, spectra of pressures to illustrate the behavior of the fluid for each solid material considered are included, then, the Fast Fourier Transform algorithm to display the results in the time domain is applied, where the emergence of Scholte's waves and the amount of energy that they carry are highlighted.
KW - Boundary element method
KW - Fluid-solid interfaces
KW - Frequency analysis
KW - Green's functions
UR - http://www.scopus.com/inward/record.url?scp=84889886747&partnerID=8YFLogxK
U2 - 10.1016/j.rimni.2013.06.003
DO - 10.1016/j.rimni.2013.06.003
M3 - Artículo
SN - 0213-1315
VL - 29
SP - 146
EP - 151
JO - Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria
JF - Revista Internacional de Metodos Numericos para Calculo y Diseno en Ingenieria
IS - 3
ER -