| 斜拉索风雨振非平稳风场特性分析 |
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| 引用本文： | 何旭辉,陈政清,李春光,方俊. 斜拉索风雨振非平稳风场特性分析[J]. 振动与冲击, 2011, 30(10): 54-60. DOI: |
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| 作者姓名： | 何旭辉 陈政清 李春光 方俊 |
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| 作者单位： | 1．中南大学土木工程学院 , 长沙,410075；2．湖南大学风工程试验研究中心, 长沙,410082 |
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| 基金项目： | 国家自然科学基金项目(50808175) |
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| 摘 要： | 基于小波多尺度分析，提取风雨振实测风速、风向的时变平均值，并建立非平稳风速模型。采用非平稳风速模型，分析了洞庭湖大桥2003年4月初风雨振时实测风速紊流强度、积分尺度、脉动风谱和概率密度等重要风场特性，并将结果与传统的平稳风速模型和基于EMD的非平稳风速模型进行比较，进一步验证采用基于小波分析的非平稳风速模型的合理性。同时，根据Davenport相干系数公式，计算了桥塔和桥面风速记录顺风向脉动风分量的相关性。
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| 关 键 词： | 桥梁工程 斜拉索 风雨振 非平稳性 小波分析 相关性 |
Nonstationary wind characteristics analysis for wind-rain induced vibration of stay cables |
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| HE Xu-hui,CHEN Zheng-qing,LI Chun-guang,,FANG Jun. Nonstationary wind characteristics analysis for wind-rain induced vibration of stay cables[J]. Journal of Vibration and Shock, 2011, 30(10): 54-60. DOI: |
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| Authors: | HE Xu-hui CHEN Zheng-qing LI Chun-guang FANG Jun |
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| Affiliation: | 1. School of Civil Engineering, Central South University, Changsha 410075,China;2. Wind Engineering Experiment Research Center, Hunan University, Changsha 410082, China |
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| Abstract: | Time-varying mean values of measured wind speed and wind direction for wind-rain induced vibration were extracted,and a nonstationary wind speed model based on wavelet analysis was proposed.By using the field measured wind speed data of wind-rain induced vibration on Dongting Lake Bridge in April 2003,the wind characteristics,such as,turbulence intensity,integral scale,wind spectra and probability distributions were calculated.The calculated results were compared with those obtained with the nonstationary w... |
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| Keywords: | bridge engineering stay cable wind-rain induced vibration nonstationarity wavelet analysis correlation |
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