Simulating the propagation of elastic waves in multi-layered media has many applications. A common approach is to use matrix methods where the elastic wave-field within each material layer is represented by a sum of partial-waves along with boundary conditions imposed at each interface. While these...
Two numerical examples show that our method can accurately approximate the fine grid solutions.doi:10.1190/segam2013-1144.1Kai GaoEric T. ChungRichard L. GibsonYalchin EfendievShubin FuK. Gao, R. Gibson Jr., E. Chung, Y. Efendiev, S. Fu, A multiscale method for elastic wave equation ...
The T-matrix method (also called the "extended boundary condition method" or "null field approach") is extended to derive expressions for the elastic field inside the half space and the surface field on the interface. The assumptions on the source that excites the half space are fairly weak....
A plane-wave method for computing the three-dimensional scattering of propagating elastic waves by a planar fracture with heterogeneous fracture compliance distribution is presented. This method is based upon the spatial Fourier transform of the seismic displacement-discontinuity (SDD) boundary conditions ...
Fig. 1 shows a plane transverse wave of amplitude ψ0, with an incident angle θβ on a row of elastic piles in a solid matrix. Such an incident wave is represented in the reference system (x1, y1) attached to the first pile asψ(inc)(x1,y1)=ψ0eip3(x1cosθβ+y1sinθβ) In ...
A thin-walled flat elastic inclusion of low rigidity is perfectly bonded to a surrounding elastic matrix and subjected to an incident plane harmonic wave. The displacement and stress fields in the wave zone of a scatterer and close to it... H.S.,Kit,and,... - 《International Journal of ...
A numerical method of solving for the elastic wave eigenmodes in acoustic waveguides of arbitrary cross-section is presented. Operating under the assumptions of linear, isotropic materials, it utilizes a finite-difference method on a staggered grid to solve for the acoustic eigenmodes (field and fr...
We present the finite-volume (FV or P0 Galerkin Discontinuous) formulation applied to the 3D visco-elastic wave equation in the frequency domain. This work is motivated within the framework of global offset seismic imaging by full waveform inversion. Concerning the direct problem, the FV formulation...
Wang and Gross (2000) developed a universal method to solve SH-wave propagation in a multi-layered medium with arbitrary number of interface cracks. The method makes use of the transfer matrix, Fourier integral transform and singular integral equation techniques. In the present paper, we extend ...
Section 2 introduces the basic theories including cross correlation analysis, analytical model of dispersion curves of Lamb waves, theoretical analysis of time-transient Lamb wave propagation under the excitation of PWAS, and finite element method for time-transient Lamb propagation simulation. In Section...