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各向异性弹性波场的有限元数值模拟
引用本文:张美根,王妙月,李小凡,杨晓春,王磊.各向异性弹性波场的有限元数值模拟[J].地球物理学进展,2002,17(3):384-389,413.
作者姓名:张美根  王妙月  李小凡  杨晓春  王磊
作者单位:1. 中国科学院地质与地球物理研究所,北京,100101
2. 胜利油田地质科学研究院,山东东营,257068
基金项目:国家杰出青年基金 (4 0 0 2 5 412 ),中科院“百人计划”资助(10 0 10 12 0 ),中科院知识创新工程重大项目 (KZCX 0 7)联合资助
摘    要:研究了各向异性弹性波有限元正演系统的精度和效率问题,提出了一种透射加衰减的组合人工边界方案(吸收边办条件),它对各向异性波具有较好的吸收效果,并且有较好的稳定性能,均匀TI介质中的模拟获得了非常清晰的波场快照,其波场特征与理论分析能够准确吻合,各向异性介质模型的地表地震记录表明,各向异性波炮集记录在波的类型、同相轴形态、能量分布和相位等方面与各向同性波都有很大差别。

关 键 词:各向异性  弹性波  吸收边界条件  有限元数值模拟  TI介质  正演  地震勘探
文章编号:1004-2903(2002)03-0384-06

Finite Element Forward Modeling of Anisotropic Elastic Waves
ZHANG Mei-gen,WANG Miao-yue,LI Xiao-fan,YANG Xiao-chun,WANG Lei.Finite Element Forward Modeling of Anisotropic Elastic Waves[J].Progress in Geophysics,2002,17(3):384-389,413.
Authors:ZHANG Mei-gen  WANG Miao-yue  LI Xiao-fan  YANG Xiao-chun  WANG Lei
Institution:ZHANG Mei-gen 1 WANG Miao-yue 1 LI Xiao-fan 1 YANG Xiao-chun 1 WANG Lei 2
Abstract:The paper studies the accuracy and efficiency of the finite element modeling system of anisotropic elastic waves, and presents a kind of transparent-plus-attenuating boundary condition. The combined boundary condition absorbs anisotropic boundary reflection waves very well. It also has good stability. Clear wave field snapshots are obtained through the modeling in homogeneous TI media. The wave field characters accord with theoretical analysis. The synthesized ground records of anisotropic models show that they are very different from isotropic wave records in aspects such as wave types, phases, forms of phase axes and energy distribution.
Keywords:Anisotropic elastic wave  Absorbing boundary condition  Finite element modeling  TI medium
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