Gain-frequency characteristics for several models of stratified geological medium

© 2014, Romanian Society of Acoustics. All rights reserved. Gain-frequency characteristics of displacements of daylight area at forced oscillations are studied. Several models utilizing a layer sitting on top of a basement are considered. Together with a classical model (considering two homogeneous media), investigated are a model for the layer with absorption and a model for the layer having continuous variation of elasticity parameters at transition toward the basement. The case of linear variation of density and a constant velocity is considered in detail. For all structures under consideration, analytical expressions for displacements of daylight area are obtained

Peculiarities of propagation of a plane elastic wave through a gradient layer

The problem of diffraction of a plane elastic wave by a gradient in the transverse direction layer is studied. The diffraction problem is reduced to a boundary value problem for the layer. The grid method is used for solving the resulting boundary value problem. Considered is diffraction of a plane longitudinal wave by the layer. The layer is composed of the following materials: plexiglas, steel as well as their linear combinations. Peculiarities of an amplitude-frequency characteristic of density of a normal component of an energy flow of a passed longitudinal wave are studied numerically. © 2013 IEEE

Gain-frequency characteristics for several models of stratified geological medium

© 2014, Romanian Society of Acoustics. All rights reserved. Gain-frequency characteristics of displacements of daylight area at forced oscillations are studied. Several models utilizing a layer sitting on top of a basement are considered. Together with a classical model (considering two homogeneous media), investigated are a model for the layer with absorption and a model for the layer having continuous variation of elasticity parameters at transition toward the basement. The case of linear variation of density and a constant velocity is considered in detail. For all structures under consideration, analytical expressions for displacements of daylight area are obtained

Gain-frequency characteristics for several models of stratified geological medium

© 2014, Romanian Society of Acoustics. All rights reserved. Gain-frequency characteristics of displacements of daylight area at forced oscillations are studied. Several models utilizing a layer sitting on top of a basement are considered. Together with a classical model (considering two homogeneous media), investigated are a model for the layer with absorption and a model for the layer having continuous variation of elasticity parameters at transition toward the basement. The case of linear variation of density and a constant velocity is considered in detail. For all structures under consideration, analytical expressions for displacements of daylight area are obtained

Elastic wave propagation through a layer with graded-index distribution of density

In this study, we investigated a one-dimensional diffraction problem of elastic wave propagation through gradient layer. The diffraction problem is reduced to an ordinary differential equation with the third type boundary conditions. The method of approximation of integral identities is applied to increase accuracy of the grid solution to the obtained boundary problem. The case when the elastic wave speed in the layer is constant and density changes continuously according to ρ0(1+AsinmBx) is considered in the paper. © 2012 IEEE

Peculiarities of propagation of a plane elastic wave through a gradient layer

The problem of diffraction of a plane elastic wave by a gradient in the transverse direction layer is studied. The diffraction problem is reduced to a boundary value problem for the layer. The grid method is used for solving the resulting boundary value problem. Considered is diffraction of a plane longitudinal wave by the layer. The layer is composed of the following materials: plexiglas, steel as well as their linear combinations. Peculiarities of an amplitude-frequency characteristic of density of a normal component of an energy flow of a passed longitudinal wave are studied numerically. © 2013 IEEE

Peculiarities of propagation of a plane elastic wave through a gradient layer

The problem of diffraction of a plane elastic wave by a gradient in the transverse direction layer is studied. The diffraction problem is reduced to a boundary value problem for the layer. The grid method is used for solving the resulting boundary value problem. Considered is diffraction of a plane longitudinal wave by the layer. The layer is composed of the following materials: plexiglas, steel as well as their linear combinations. Peculiarities of an amplitude-frequency characteristic of density of a normal component of an energy flow of a passed longitudinal wave are studied numerically. © 2013 IEEE

Elastic wave propagation through a layer with graded-index distribution of density

In this study, we investigated a one-dimensional diffraction problem of elastic wave propagation through gradient layer. The diffraction problem is reduced to an ordinary differential equation with the third type boundary conditions. The method of approximation of integral identities is applied to increase accuracy of the grid solution to the obtained boundary problem. The case when the elastic wave speed in the layer is constant and density changes continuously according to ρ0(1+AsinmBx) is considered in the paper. © 2012 IEEE

Elastic wave propagation through a layer with graded-index distribution of density

In this study, we investigated a one-dimensional diffraction problem of elastic wave propagation through gradient layer. The diffraction problem is reduced to an ordinary differential equation with the third type boundary conditions. The method of approximation of integral identities is applied to increase accuracy of the grid solution to the obtained boundary problem. The case when the elastic wave speed in the layer is constant and density changes continuously according to ρ0(1+AsinmBx) is considered in the paper. © 2012 IEEE

Peculiarities of propagation of a plane elastic wave through a gradient layer

The problem of diffraction of a plane elastic wave by a gradient in the transverse direction layer is studied. The diffraction problem is reduced to a boundary value problem for the layer. The grid method is used for solving the resulting boundary value problem. Considered is diffraction of a plane longitudinal wave by the layer. The layer is composed of the following materials: plexiglas, steel as well as their linear combinations. Peculiarities of an amplitude-frequency characteristic of density of a normal component of an energy flow of a passed longitudinal wave are studied numerically. © 2013 IEEE