Abstract:The optimal nearly-analytic discretization (ONAD),a newly developed numerical simulation,is characterized by the use of the displacement gradient in the high-order finite difference. Comparing with the Lax-Wendroff numerical simulation,the ONAD method can effectively restrain the dispersion in a large grid,thus improve the computational efficiency and accuracy. In this paper,we apply the ONAD method to an elastic wave field separation simulation,and set up difference formats of the wave field separation simulation. Based on our model tests,characteristics of P-and S-waves are clearly extracted by the proposed method,which proves its validity and applicability in the analysis of seismic wave propagation in complex media.
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