中文摘要：

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．

英文摘要：

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.