| 无限域波动问题的有限元模型 |
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| 引用本文： | 刘天云,刘光廷,刘颖黎.无限域波动问题的有限元模型[J].工程力学,2002,19(2):22-25. |
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| 作者姓名： | 刘天云 刘光廷 刘颖黎 |
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| 作者单位： | 清华大学水利系,北京,100084 |
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| 摘 要： | 本文基于半解析波动方程,推导了无限域粘弹性人工边界单元。在有限元波动模型中,统一了节点计算稳定性问题;提出了合理的人工边界反射系数公式,为有限元模型提供了理论基础。SH波数值分析表明本文有限元模型具有多向波动透射能力。
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| 关 键 词： | 半解析法 波动反射 无限域 有限元 |
| 文章编号： | 1000-4750(2002)01-022-04 |
A FEM MODEL FOR INFINITE MEDIA WAVE PROBLEMS |
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| LIU Tian-yun,LIU Guang-ting,LIU Ying-li.A FEM MODEL FOR INFINITE MEDIA WAVE PROBLEMS[J].Engineering Mechanics,2002,19(2):22-25. |
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| Authors: | LIU Tian-yun LIU Guang-ting LIU Ying-li |
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| Abstract: | This paper presents a new artificial boundary element formula for unbounded media wave problems, which is derived from semi-analytical one-side wave equation. The numerical stability may be controlled for both the inner and boundary points. A reasonable spurious parameter of artificial boundary is also proposed, which lays down the base for FEM numerical simulation. The SH numerical example shows that this new artificial boundary element has a multi-directional transmitting property. |
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| Keywords: | semi-analytical method wave reflection infinite media FEM |
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