| 考虑辐射阻尼的拱坝随机振动分析 |
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| 引用本文： | 吴健,金峰,徐艳杰.考虑辐射阻尼的拱坝随机振动分析[J].水利学报,2005,36(1):0110-0115. |
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| 作者姓名： | 吴健 金峰 徐艳杰 |
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| 作者单位： | 清华大学水利水电工程系,北京,100084 |
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| 摘 要： | 本文基于有限元-边界元-无限边界元耦合的时域模型，提出了结合随机振动虚拟激励法的拱坝-地基动力相互作用分析模型，并用蒙特卡罗法对模型进行了验证。对某拱坝的计算结果表明，辐射阻尼对拱坝随机动力响应有显著影响，结果同时表明，地震动的随机性对于拱坝动力响应的影响明显，用有限的几条确定性地震动时程输入不能全面反映地震动的随机性。
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| 关 键 词： | 随机振动 无限地基 辐射阻尼 虚拟激励法 拱坝-地基动力相互作用 |
| 文章编号： | 0559-9350(2005)01-0110-06 |
| 修稿时间： | 2003年10月27 |
Random vibration analysis of arch dam in consideration of radiation damping |
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| WU Jian,JIN Feng,XU Yan-jie.Random vibration analysis of arch dam in consideration of radiation damping[J].Journal of Hydraulic Engineering,2005,36(1):0110-0115. |
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| Authors: | WU Jian JIN Feng XU Yan-jie |
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| Affiliation: | Tsinghua University, Beijing 100084, China |
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| Abstract: | A random vibration analysis method for studying the interaction between arch dam and foundation is proposed. The method combines the finite element-boundary element-infinite boundary element model in time domain with psudo-excitation algorithm. For verifying the validity of this method the Monte-Carlo method is applied to calculate the seismic response of an arch dam. The result demonstrates that the effect of radiation damping on seismic response of arch dam is remarkable. The random characteristics of earthquake are also proved to be important to the seismic response evaluation of arch dams. |
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| Keywords: | random vibration infinite foundation radiation damping pseudo-excitation algorithm interaction |
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