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由于对边界反射具有优秀的吸收效果,完全匹配层(Perfectly Matched Layer,PML)吸收边界条件自被提出就受到了广泛的关注和研究,并发展成为地震正演数值模拟中应用最广泛的边界条件.随着地震正演数值模拟技术的发展,对PML边界条件的研究取得了显著的进展,发展形成了多种PML边界条件,并在声波、弹性波等多种方程的地震正演数值模拟中得到了广泛的应用,取得了良好的效果.但是,对于该领域涌现出的大量的研究成果,缺少系统总结的综述性文献.为此,本文归纳梳理了近年来PML边界条件在地震正演数值模拟领域的研究和应用成果,分阶段地概述了PML边界条件的发展进程.最后讨论总结了各种方法的异同之处,并对地震正演数值模拟领域中PML边界条件的研究方向进行了展望.
Due to its excellent absorption effect on boundary reflection, the absorption boundary conditions of Perfectly Matched Layer (PML) have been widely studied and studied, and have become the most widely used boundary conditions in numerical simulation of seismic forward modeling With the development of numerical modeling of seismic forward modeling, significant progress has been made in the study of PML boundary conditions, and many kinds of PML boundary conditions have been developed. In numerical simulation of seismic forward modeling of many kinds of equations, such as acoustic waves and elastic waves Has been widely used, and achieved good results.However, a large number of research results emerging in the field, the lack of comprehensive review of the systematic literature.To this end, the paper summarizes the recent PML boundary conditions in the seismic forward numerical The research progress and application results of the simulation field are summarized in detail in the progress of the boundary conditions of PML.Finally, the similarities and differences of various methods are summarized and the research direction of PML boundary conditions in numerical simulation of seismic forward is prospected .