| 多次透射公式实用形式稳定性分析 |
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| 引用本文： | 景立平.多次透射公式实用形式稳定性分析[J].地震工程与工程振动,2004,24(4):20-24. |
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| 作者姓名： | 景立平 |
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| 作者单位： | 中国地震局工程力学研究所,黑龙江,哈尔滨,150080 |
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| 基金项目： | 地震科学联合基金项目(102030),中国地震局"十五"重点科研项目 |
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| 摘 要： | 本文以二维出平面波动方程为例,利用数值方法研究了多次透射公式的实用形式的稳定问题,结果表明：多次透射公式的实用形式与波动方程的集中质量显式有限元结合,不但存在零频漂移,而且同样存在高频振荡失稳,而与中心差分方法结合仅存在零频漂移失稳。
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| 关 键 词： | 多次透射公式 稳定性 |
| 文章编号： | 1000-1301(2004)04-0020-05 |
Stability analysis of practical formula for multi-transmitting boundary |
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| Jing Liping.Stability analysis of practical formula for multi-transmitting boundary[J].Earthquake Engineering and Engineering Vibration,2004,24(4):20-24. |
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| Authors: | Jing Liping |
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| Abstract: | Taking two-dimensional SH wave motion as an example,the author analyzes the stability of the practical formula of multi-transmitting artificial boundary by using numerical method. Results show that not only high frequency instability occurs ,but also zero frequency drift instability exists when the practical formula of multi-transmitting boundary combines with lumped-mass explicit finite element method. Only the zero frequency drift instability exists when the practical formula of multi transmitting boundary combines with central differential method of wave motion equation. |
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| Keywords: | multi-transmitting formula stability |
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