| 大跨度桥梁风场模拟方法对比研究 |
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| 引用本文： | 曾宪武,韩大建.大跨度桥梁风场模拟方法对比研究[J].地震工程与工程振动,2004,24(1):135-140. |
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| 作者姓名： | 曾宪武 韩大建 |
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| 作者单位： | 华南理工大学建筑学院土木工程系,广东,广州,510640;华南理工大学建筑学院土木工程系,广东,广州,510640 |
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| 基金项目： | 广东省自然科学基金资助项目(000387) |
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| 摘 要： | 本文将基于线性滤波器的ARMA模型应用于大跨度桥梁的风场模拟，推导出自回归(AR)阶数P和滑动回归(MA)阶数q不等情况下，ARMA模型用于模拟多变量稳态随机过程的公式，将ARMA风场模拟方法与目前广泛应用于大跨度桥梁风场模拟的谐波合成法应用于一座实际大跨度斜拉桥的风场模拟，通过对比研究得出一些有意义的结论，并证实了ARMA法能够在保证模拟精度的前提下，大大提高风场模拟的效率。
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| 关 键 词： | 大跨度桥梁 风场模拟 ARMA模型 谐波合成法 修正谐波合成法 |
| 文章编号： | 1000-1301(2004)01-0135-06 |
A comparative study on simulation methods for wind field of long-span bridges |
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| ZENG Xian-wu,HAN Da-jian.A comparative study on simulation methods for wind field of long-span bridges[J].Earthquake Engineering and Engineering Vibration,2004,24(1):135-140. |
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| Authors: | ZENG Xian-wu HAN Da-jian |
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| Abstract: | An application of ARMA model to simulate wind field of long-span bridges is dealt with in this paper. Formulation of an ARMA model with different order for AR and MA components is established for the characterization and simulation of stationary Gaussian multivariate random processes with zero mean. A numerical example is undertaken and a comparative study has been performed on the merits and drawbacks of the ARMA representation method and the spectral representation method which is widely used to simulate wind field of long-span bridges. Some meaningful conclusions are presented and it shows that the ARMA representation method is much more efficient compared to the spectral representation method under the same simulation accuracy. |
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| Keywords: | long-span bridges wind field simulation ARMA representation spectral representation modified spectral representation |
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