scholarly journals Use of velocity potentials in the definition of absorbing boundaries for FDTD analysis of elastic wave fields

2003 ◽  
Vol 24 (6) ◽  
pp. 415-418 ◽  
Author(s):  
Masahiro Sato
Keyword(s):  
Elastic Wave ◽  
Wave Fields ◽  
Absorbing Boundaries ◽  
Definition Of

Identification of the interface between acoustic and elastic waves from internal measurements

2020 ◽  
Vol 28 (3) ◽  
pp. 313-322
Author(s):  
Yanli Cui ◽  
Fenglong Qu
Keyword(s):  
Boundary Conditions ◽  
Elastic Wave ◽  
Uniqueness Theorem ◽  
Elastic Waves ◽  
Wave Fields ◽  
Fluid Solid Interaction ◽  
Interaction Problem ◽  
Penetrable Boundary ◽  
Interior Transmission Problem

AbstractConsider the fluid-solid interaction problem for a two-layered non-penetrable cavity. We provide a novel fundamental proof for a uniqueness theorem on the determination of the interface between acoustic and elastic waves from many internal measurements, disregarding the boundary conditions imposed on the exterior non-penetrable boundary. The proof depends on a uniform {H^{1}}-norm boundedness for the elastic wave fields and the construction of the coupled interior transmission problem related to the acoustic and elastic wave fields.

Asymptotic representations of elastic wave fields in permeable strata

2013 ◽  
Vol 59 (5) ◽  
pp. 548-558 ◽  
Author(s):  
A. I. Filippov ◽  
O. V. Akhmetova ◽  
G. F. Zamanova
Keyword(s):  
Elastic Wave ◽  
Wave Fields ◽  
Asymptotic Representations

Acoustic and Elastic Wave Fields in Geophysics, III

2006 ◽  
Vol 40 (2) ◽  
pp. 499-500
Author(s):  
Peter G. Malischewsky
Keyword(s):  
Elastic Wave ◽  
Wave Fields

scholarly journals Interaction of elastic waves with ice layer in shelf zone

2019 ◽  
Vol 127 ◽  
pp. 02013 ◽  
Author(s):  
Vladimir Korochentsev ◽  
Jingwei Yin ◽  
Anastasiya Viland ◽  
Tatyana Lobova ◽  
Natalia Soshina
Keyword(s):  
Theoretical Model ◽  
Elastic Wave ◽  
Helmholtz Equation ◽  
Elastic Waves ◽  
Function Theory ◽  
Shelf Zone ◽  
Wave Interactions ◽  
Wave Fields ◽  
Calculation Algorithms ◽  
Propagation Of Elastic Waves

A theoretical model for the propagation of elastic waves of arbitrary wave sizes from 0.5 to 20 units in an ice layer has been developed. The calculation was based on Green’s function theory for Helmholtz equation. Special “directed” Green’s functions were introduced. They make it possible to anayze wave fields in closes volumes limited by different-angle impedances. The developed calculation algorithms allow one to anayze fields on medium-powered computers for 15 minutes. The suggested methods are capable of estimating elastic wave interactions with different impedances in bays, lakes and other volumes with limited wave sizes.

A plane‐wave decomposition for elastic wave fields applied to the separation of P‐waves and S‐waves in vector seismic data

Geophysics ◽  
1986 ◽  
Vol 51 (2) ◽  
pp. 419-423 ◽  
Author(s):  
A. J. Devaney ◽  
M. L. Oristaglio
Keyword(s):  
Plane Wave ◽  
Elastic Wave ◽  
Seismic Data ◽  
Seismic Profile ◽  
P Waves ◽  
Wave Fields ◽  
S Waves ◽  
Plane Wave Decomposition ◽  
Wave Decomposition ◽  
Seismic Measurements

We describe a method to decompose a two‐dimensional (2-D) elastic wave field recorded along a line into its longitudinal and transverse parts, that is, into compressional (P) waves and shear (S) waves. Separation of the data into P-waves and S-waves is useful when analyzing vector seismic measurements along surface lines or in boreholes. The method described is based on a plane‐wave expansion for elastic wave fields and is illustrated with a synthetic example of an offset vertical seismic profile (VSP) in a layered elastic medium.

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