Irregular surface seismic forward modeling by a body-fitted rotated–staggered-grid finite-difference method
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DOI: 10.1007/s11770-018-0697-2
Abstract: Finite-difference (FD) methods are widely used in seismic forward modeling owing to their computational efficiency but are not readily applicable to irregular topographies. Thus, several FD methods based on the transformation to curvilinear coordinates using… read more here.
Keywords: staggered grid; forward modeling; method; finite difference ... See more keywords
A Nonbalanced Staggered-Grid FDTD Scheme for the First-Order Elastic-Wave Extrapolation and Reverse-Time Migration
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing"
DOI: 10.1109/jstars.2022.3181000
Abstract: In this study, an efficient and accurate staggered-grid finite-difference time-domain method to solve the two-dimensional (2-D) first-order stress–velocity elastic-wave equation is proposed. In the conventional implementation of the staggered-grid finite-difference (SGFD) method, the same SGFD… read more here.
Keywords: time; staggered grid; sgfd; scheme ... See more keywords
Elastic Wave Modeling With High-Order Temporal and Spatial Accuracies by a Selectively Modified and Linearly Optimized Staggered-Grid Finite-Difference Scheme
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DOI: 10.1109/tgrs.2021.3078626
Abstract: High-order staggered-grid finite-difference (SFD) schemes are preferred in elastic wave simulation for geophysical problems because they decrease the accumulation of error from grid dispersion. However, most SFD approaches reach high-order spatial but limited temporal accuracy.… read more here.
Keywords: staggered grid; sfd; order; high order ... See more keywords
Analysis of Seismic Wavefield Characteristics in 3D Tunnel Models Based on the 3D Staggered-Grid Finite-Difference Scheme in the Cylindrical Coordinate System
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DOI: 10.3390/app11135854
Abstract: The accurate prediction of the geological conditions ahead of a tunnel plays an important role in tunnel construction. Among all forward geological prospecting methods, the seismic detection method is widely applied. However, due to the… read more here.
Keywords: seismic wavefield; coordinate system; characteristics tunnel; staggered grid ... See more keywords