%0 Journal Article
%T One-way propagators coupled with reflection/transmission coefficients for seismogram synthesis in complex media<br>基于耦合反射/透射系数单程波传播算子的地震波模拟研究
%A SUN Wei-Jia
%A FU Li-Yun
%A YAO Zhen-Xing
%A <br>孙伟家
%J 地球物理学报
%D 2009
%I 
%X The one-way and one-return approximation is a multiple-forescattering-single-backscattering (MFSB) approximation. Compared with the full-waveform numerical methods, one-way approximation leads to a great saving of computing time and memory, which makes it possible to modelling wave propagation in long distances. In this article, we combine both the one-return and separation-of-variables approximations to develop a new one-way propagator coupled with reflection/transmission (R/T) coefficients for seismogram synthesis in complex media. The method is derived from establishing simultaneous generalized Lippmann-Schwinger equations in two adjoining heterogeneous layers followed by the separation-of-variables and one-return approximations. The resulting one-way propagator consists of two parts: the separation-of-variables screen propagator and the R/T operators that account for amplitude variations with incident angles across interfaces. The separation-of-variables screen propagator for one-way wave propagation accounts for wide angles in large-contrast media. The R/T coefficients are the implicit function of dip angle of geology subsurface, whose calculation is coupled with one-way propagation simulation in a natural manner. We benchmark the presented method against the full-waveform boundary element (BE) method for two numerical examples and a real geology structure, which shows that the presented method simulate the reflected waves well in travel time, amplitude, and waveform for various velocity contrasts across interfaces.
%K One-way integral equation
%K Separation-of-variables approximations
%K One-return approximations
%K Reflection/transmission coefficients
%K Seismic modelling<br>单程波动积分方程
%K 分离变量逼近
%K 单程波近似
%K 反射/透射系数
%K 地震模拟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=C6945A658B7BF227EFE850238590C652&yid=DE12191FBD62783C&vid=286FB2D22CF8D013&iid=F3090AE9B60B7ED1&sid=05F50C9DD505CDDA&eid=91907174EE146596&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=0&reference_num=16