| 考虑时间-空间变化的人工随机场模拟 |
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| 引用本文： | 倪永军,朱晞.考虑时间-空间变化的人工随机场模拟[J].地震学报,2002,24(4):407-412. |
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| 作者姓名： | 倪永军 朱晞 |
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| 作者单位： | (中国北京100044北方交通大学土建学院) |
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| 基金项目： | 国家自然科学基金 (59978001)资助项目 |
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| 摘 要： | 采用随频率变化的视波速代替随意给定的视波速，并在随机场的模拟中引入相位差谱来考虑地震动的频率含量非平稳性．用谱表示法按不同的设计烈度生成了时间-空间变化的非平稳人工随机场，可用于大跨度空间结构多点激励的地震动输入．
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| 关 键 词： | 人工随机场& 视波速& 相位差谱 |
| 文章编号： | 0253-3782(2002)04-0407-06 |
| 修稿时间： | 2001年11月14 |
SIMULATION OF ARTIFICIAL RANDOM FIELD CONSI-DERING THE TEMPORAL-SPATIAL VARIATION |
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| Ni Yongjun,Zhu Xi.SIMULATION OF ARTIFICIAL RANDOM FIELD CONSI-DERING THE TEMPORAL-SPATIAL VARIATION[J].Acta Seismologica Sinica,2002,24(4):407-412. |
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| Authors: | Ni Yongjun Zhu Xi |
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| Abstract: | In this paper an apparent wave velocity varying with the frequency of earthquake wave was adopted rather than an arbitrary one. The phase difference spectrum was introduced to consider the non-stationary properties of frequency contents in simulating artificial random field. The non-stationary random field on hard site considering the temporal-spatial variation was simulated by the way of spectral representation method. This random field can be used as the input of earthquake ground motion of the seismic response analysis of large-span spatial structures considering the effect of multi-supported excitation. |
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| Keywords: | artificial random field apparent wave velocity phase difference spectrum |
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