Paper Info
Title
A Nonbalanced Staggered-Grid FDTD Scheme for the First-Order Elastic-Wave Extrapolation and Reverse-Time Migration
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 operator is used to approximate the spatial derivatives. However, we propose a numerical method based on the mixed SGFD operators that are more efficient but similar in accuracy when compared with a uniform SGFD operator. We refer to the proposed method as the nonbalanced SGFD numerical scheme that combines the high-order SGFD operators with the second-order SGFD operators. The suitability of the proposed scheme is verified by dispersion analysis. Through SGFD modeling and reverse-time migration examples, we demonstrate that the proposed nonbalanced scheme offers a similar level of accuracy with a lower computational cost compared with the time-consuming conventional SGFD method.
Year
DOI
Venue
2022
10.1109/JSTARS.2022.3181000
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
Keywords
DocType
Volume
Mathematical models, Finite difference methods, Dispersion, Propagation, Time-domain analysis, Imaging, Finite element analysis, Elastic waves, finite-difference methods, geophysics computing, reverse-time migration (RTM)
Journal
15
ISSN
Citations 
PageRank 
1939-1404
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Wenquan Liang100.34
Guoxin Chen212.04
Yanfei Wang38917.61
Jingjie Cao400.34
Jinxin Chen500.34