弹性波方程正演混合吸收边界的改进  

Forward Modeling of Elastic Wave Equation with the Improved Hybrid Absorbing Boundary Condition

作　　者：崔丽苹 张会星[1] CUI Li-Ping;ZHANG Hui-Xing(The Key Lab of Submarine Geoscience and Prospecting Techniques,Ministry of Education,College of Marine Geoscience,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,海洋地球科学学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2018年第12期87-92,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金“部分饱和孔隙介质中地震波的衰减和频散机理研究”(41204089)资助。

摘　　要：边界反射问题是地震波正演模拟的重要研究内容,高吸收效率、低消耗的边界条件越来越受到关注。本文针对弹性波一阶方程正演模拟过程中的混合吸收边界存在的问题,提出一种过渡区指数型加权叠加参数的混合吸收边界条件。模型模拟结果表明,同常规混合吸收边界算法相比,本文算法能够提高边界反射压制效果,提高数值模拟精度。The seismic wave forward modeling is an important method to study the propagation of seismic wave in underground media,and high-accuracy algorithm supports the subsequent seismic data processing greatly.The boundary reflection problem is an important research content of seismic wave forward modeling,and the high absorption efficiency and low consumption boundary conditions have drawn much more attention now.In this paper,an exponential weighted hybrid absorbing boundary condition is proposed for the problem of the hybrid absorbing boundary conditions.The results show that compared with the conventional hybrid absorption boundary algorithm,our new method can obtain better absorption effect and improve the simulation accuracy as well.

关 键 词：混合吸收边界 指数型加权叠加参数 速度应力方程 正演模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]