| 桥梁断面颤振导数识别的协方差块Hankel矩阵法 |
| |
| 引用本文： | 祝志文,顾明,秦仙蓉.桥梁断面颤振导数识别的协方差块Hankel矩阵法[J].同济大学学报(自然科学版),2007,35(5):587-591. |
| |
| 作者姓名： | 祝志文 顾明 秦仙蓉 |
| |
| 作者单位： | 1. 同济大学,土木工程防灾国家重点实验室,上海,200092;湖南大学,风工程研究中心,湖南,长沙,410082
2. 同济大学,土木工程防灾国家重点实验室,上海,200092 |
| |
| 基金项目： | 国家自然科学基金;国家自然科学基金 |
| |
| 摘 要： | 采用基于协方差块Hankel矩阵（covariance block Hankel matrix，CBHM）方法来处理节段模型风洞试验的二自由度振动衰减信号，通过系统识别来提取桥梁断面的颤振导数．为验证该方法的可行性，进行了实际桥梁断面的节段模型试验，并将识别的颤振导数与Theodorson理想平板解析解、特征系统实现法（eigensystem realization algorithm，ERA）结果进行了比较，颤振导数的一致性证明了本文方法的有效性．
|
| 关 键 词： | 桥梁断面 颤振 风洞试验 系统识别 协方差块Hankel矩阵方法 |
| 文章编号： | 0253-374X（2007）05-0587-05 |
| 修稿时间： | 2005-09-23 |
Identification of Flutter Derivatives of Sectional Model Based on Covariance Block Hankel Matrix Method |
| |
| ZHU Zhiwen,GU Ming,QIN Xianrong.Identification of Flutter Derivatives of Sectional Model Based on Covariance Block Hankel Matrix Method[J].Journal of Tongji University(Natural Science),2007,35(5):587-591. |
| |
| Authors: | ZHU Zhiwen GU Ming QIN Xianrong |
| |
| Institution: | 1.State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 2. Research Center in Wind Engineering, Hunan University, Changsha 410082, China |
| |
| Abstract: | This paper presents the basic formulations of Covariance Block Hankel Matrix(CBHM) method and the corresponding strategies to identify flutter derivatives of bridge deck.Sectional model tests of a real bridge deck are conducted to validate the CBHM method by extracting flutter derivatives from the free decay vibration responses.The identified flutter derivatives are compared to both Theodorsen analytical solutions of the ideal thin plate and results from Eigensystem Realization Algorithm(ERA).Reasonable agreements among them demonstrate the effectiveness of the present method. |
| |
| Keywords: | bridge deck flutter wind tunnel test system identification covariance block Hankel matrix method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
