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提出了一种利用节段模型的自由振动响应数据识别桥梁断面气动导数的新方法—总体最小二乘时域法，该方法试验装置简单，避免了识别过程中参数选择带来的影响并且具有很高的精度和收敛性。针对自由振动测试技术在高风速下因竖弯方向气动阻尼太大、信号衰减过快导致识别不能进行的问题，本文改变模型的质量、质量惯矩及扭弯频率比进行了一系列试验，说明可以通过增加模型质量和质量惯矩的方法得到足够用于桥梁颤振分析的气动导数。将得出的江阴桥模型的试验结果与Ｓｃａｎｌａｎ方法的结果进行了对比，并且根据它算出的颤振风速在全桥气弹模型上得到了验证。
A new method of total least squares time-domain method is presented, which uses the free vibration response data of segment model to identify the aerodynamic derivative of bridge cross section. The experimental device is simple and avoids the influence of parameter selection in the identification process, High precision and convergence. Aiming at the problem that the free vibration test technology can not identify because the aerodynamic damping is too high and the signal attenuation is too fast under high wind speed, the paper tests the quality, mass moment of inertia and twist frequency ratio The aerodynamic derivatives sufficient for flutter analysis of the bridge can be obtained by increasing the mass of the model and the mass moment of inertia. The experimental results of the Jiangyin bridge model are compared with those of the Scanlan method, and the flutter wind speed calculated from the results is verified on a full bridge Aeroelastic model.