| 有限元波动模拟中傍轴近似透射边界 |
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| 引用本文： | 张剑锋.有限元波动模拟中傍轴近似透射边界[J].大连理工大学学报,1995,35(5):741-744. |
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| 作者姓名： | 张剑锋 |
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| 作者单位： | 大连理工大学工程力学系 |
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| 基金项目： | 辽宁省博士科研基金资助项目 |
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| 摘 要： | 有限元波动模拟中傍轴近似透射边界张剑锋（大连理工大学工程力学系１１６０２４）关键词：地震波；有限元法／傍轴近似；人工边界分类号：Ｏ２４２．２１；Ｐ３１５．３实际地震波是在半无限域中传播，但有限元有限差分等数值方法只能在有限尺寸模型上求解；因此数值模拟...
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| 关 键 词： | 地震波 有限元法 傍轴近似 人工边界 数值模拟 |
Transmission boundary of paraxial approximations for numerical wave simulation by finite element method |
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| Zhang Jianfeng.Transmission boundary of paraxial approximations for numerical wave simulation by finite element method[J].Journal of Dalian University of Technology,1995,35(5):741-744. |
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| Authors: | Zhang Jianfeng |
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| Abstract: | The incoming and outgoing wave fields are separatedby paraxial approximation ofelastic wave equation and the artificial reflection can be efficiently reduced by describing wavepropagation in the edges of the domain of computation with above oneway wave equation. Atransmission element is obtained by discretization of the one-way wave equation, with whichartificial reflection can be efficiently reduced by setting the transmission element on the artificialboundary for numerical wave simulation by finite element method. The method presented cansolve the problem with complex geometry boundary by combining with finite element method andit is easy to be programed. The numerical results show that it is of high computational precisionand good stability. |
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| Keywords: | paraxial approximations artificial boundary/elastic wave finite element method |
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