| 频率域2.5维电磁测深有限元模拟中的吸收边界条件 |
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| 引用本文： | 薛东川,戴世坤.频率域2.5维电磁测深有限元模拟中的吸收边界条件[J].中国石油大学学报(自然科学版),2008,32(6). |
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| 作者姓名： | 薛东川 戴世坤 |
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| 作者单位： | 中国石油大学CNPC物探重点实验室,北京,102249 |
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| 摘 要： | 针对频率域2.5维电磁测深问题,借鉴地震波模拟中吸收边界的处理方法,将波数域电磁场方程分解成两个传播方向相反的单程波方程,以沿边界外法向衰减的单程波方程作为该边界上的吸收边界条件.给出了全吸收边界条件的构造方法,并导出了15°吸收边界的具体形式.数值计算结果表明,该吸收边界条件使边界反射得到了有效压制,在相同的计算量下计算精度显著提高.
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| 关 键 词： | 吸收边界条件 2.5维 电磁测深 有限元方法 |
Absorbing boundary condition for simulating 2.5-D electromagnetic sounding in frequency domain by finite element method |
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| XUE Dong-chuan,DAI Shi-kun.Absorbing boundary condition for simulating 2.5-D electromagnetic sounding in frequency domain by finite element method[J].Journal of China University of Petroleum,2008,32(6). |
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| Authors: | XUE Dong-chuan DAI Shi-kun |
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| Institution: | XUE Dong-chuan,DAI Shi-kun(Key Laboratory of Geophysical Exploration of China National Petroleum Corporation,China University of Petroleum,Beijing 102249,China) |
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| Abstract: | Referring to the method of constructing Absorbing boundary condition in seismic wave modeling,Absorbing boundary condition for simulating 2.5-D electromagnetic sounding in frequency domain was studied by finite element method.Electromagnetic equation was decomposed into two reverse direction one-way wave equations in wavenumber domain.Then,the one-way equation,which decayed along the outer normal direction was treated as the Absorbing boundary condition of that boundary.The method how to construct full Abso... |
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| Keywords: | Absorbing boundary condition 2 5-D electromagnetic sounding finite element method |
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