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Application of the double absorbing boundary condition in seismic modeling 被引量:1
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作者 刘洋 李向阳 陈双全 《Applied Geophysics》 SCIE CSCD 2015年第1期111-119,123,共10页
We apply the newly proposed double absorbing boundary condition(DABC)(Hagstrom et al., 2014) to solve the boundary reflection problem in seismic finite-difference(FD) modeling. In the DABC scheme, the local high... We apply the newly proposed double absorbing boundary condition(DABC)(Hagstrom et al., 2014) to solve the boundary reflection problem in seismic finite-difference(FD) modeling. In the DABC scheme, the local high-order absorbing boundary condition is used on two parallel artificial boundaries, and thus double absorption is achieved. Using the general 2D acoustic wave propagation equations as an example, we use the DABC in seismic FD modeling, and discuss the derivation and implementation steps in detail. Compared with the perfectly matched layer(PML), the complexity decreases, and the stability and fl exibility improve. A homogeneous model and the SEG salt model are selected for numerical experiments. The results show that absorption using the DABC is considerably improved relative to the Clayton–Engquist boundary condition and nearly the same as that in the PML. 展开更多
关键词 Double absorbing boundary condition numerical modeling finite-difference method artificial boundary condition
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Absorbing Boundary Conditions for Hyperbolic Systems
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作者 Matthias Ehrhardt 《Numerical Mathematics(Theory,Methods and Applications)》 SCIE 2010年第3期295-337,共43页
This paper deals with absorbing boundary conditions for hyperbolic systems in one and two space dimensions.We prove the strict well-posedness of the resulting initial boundary value problem in 1D.Afterwards we establi... This paper deals with absorbing boundary conditions for hyperbolic systems in one and two space dimensions.We prove the strict well-posedness of the resulting initial boundary value problem in 1D.Afterwards we establish the GKS-stability of the corresponding Lax-Wendroff-type finite difference scheme.Hereby,we have to extend the classical proofs,since the(discretized) absorbing boundary conditions do not fit the standard form of boundary conditions for hyperbolic systems. 展开更多
关键词 Absorbing boundary conditions hyperbolic system Engquist and Majda approach strict well-posedness GKS-stability.
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地震数值正演在城市活断层探测中的应用
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作者 刘洋 傅少君 《武汉大学学报(工学版)》 CAS CSCD 北大核心 2017年第A01期442-446,共5页
建筑物安全越来越受到人们的重视,当前常用的施工方法(钻探、触探等技术手段)存在受地形地质条件限制和技术实施不灵活等问题.人工地震方法能够大大提高勘探精度,并且克服常用施工方法的不足.将高精度的双吸收边界条件——任意偶阶高精... 建筑物安全越来越受到人们的重视,当前常用的施工方法(钻探、触探等技术手段)存在受地形地质条件限制和技术实施不灵活等问题.人工地震方法能够大大提高勘探精度,并且克服常用施工方法的不足.将高精度的双吸收边界条件——任意偶阶高精度差分算子有限差分地震正演算法应用到城市活断层的探测中,并设计了两个城市活断层模型进行分析,得到活断层的地震记录响应特征,并通过寻求活断层在地震记录上的特征,帮助解释实际活断层地震资料表征的地下介质结构、岩性与年代. 展开更多
关键词 活断层 地震数值正演 双吸收边界条件
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