| 桥梁气动导纳识别的阶跃函数拟合法 |
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| 引用本文： | 王雄江,顾明,瞿伟廉. 桥梁气动导纳识别的阶跃函数拟合法[J]. 土木工程学报, 2011, 0(11): 66-73 |
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| 作者姓名： | 王雄江 顾明 瞿伟廉 |
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| 作者单位： | 武汉理工大学;同济大学土木工程防灾国家重点实验室;武汉理工大学道路桥梁与结构工程湖北省重点实验室; |
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| 基金项目： | 国家自然科学基金(50908184,50621062,50830203); 中国博士后基金(20100480887) |
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| 摘 要： | 基于桥梁主梁断面气动导数、阶跃函数与气动导纳之间的关系,提出一种获取气动导纳的阶跃函数拟合法。首先根据紊流风场中的抖振响应,识别桥梁结构气动导数和等效气动导纳,然后由气动导数可拟合得到阶跃函数,并根据阶跃函数系数计算得到竖向脉动风对应的气动导纳,最后结合等效气动导纳计算水平向脉动风对应的气动导纳。阶跃函数拟合法直接根据抖振响应完成了桥梁断面完整气动导纳的识别,实例研究表明,该方法对于桥梁断面气动导纳识别而言是可行的。
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| 关 键 词： | 阶跃函数 气动导纳 大跨桥梁 气动导数 |
Determination of aerodynamic admittance functions of bridge deck by using indicial functions |
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| Wang Xiongjiang Gu Ming Qu Weilian. Determination of aerodynamic admittance functions of bridge deck by using indicial functions[J]. China Civil Engineering Journal, 2011, 0(11): 66-73 |
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| Authors: | Wang Xiongjiang Gu Ming Qu Weilian |
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| Affiliation: | Wang Xiongjiang1 Gu Ming2 Qu Weilian3(1.Wuhan University of Technology,Wuhan 430070,China,2.State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,3.Hubei Key Laboratory of Roadway Bridge & Structure Engineering,Wuhan University of Technology,China) |
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| Abstract: | Based on the relationships among flutter derivatives,indicial functions and aerodynamic admittance functions,a method is proposed for determining the complete aerodynamic admittance functions.First,the buffeting response of bridge decks in turbulent wind field,from which flutter derivatives and equivalent aerodynamic admittance functions can be estimated,is obtained.Then,indicial functions are calculated according to the relationships between flutter derivatives and indicial functions and aerodynamic admitt... |
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| Keywords: | indicial function aerodynamic admittance bridge decks flutter derivative |
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