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本文建立了与气动实验相应的全桥样条模型，以分析吊桥颤振。根据片条假定以及所取用的力学模型，导出颤振微分方程和关于颤振导数的空气动力矩阵（气动阻尼阵和气动弹性阵）。在样条有限元条法分析吊桥固有振动的基础上，进一步计算吊桥的颤振频率和临界风速。以旧Ｔａｃｏｍａ桥为例，计算结果与现场实测值相一致。
In this paper, we establish a full-bridge spline model corresponding to the aerodynamic experiment to analyze the suspension bridge flutter. Based on the assumptions of the strip and the mechanical model taken, the chatter differential equations and the aerodynamic matrices (aerodynamic damping matrices and aeroelastic matrices) on the flutter derivatives are derived. Based on the finite element method of spline analysis of natural vibration of suspension bridge, the flutter frequency and critical wind speed of suspension bridge are further calculated. Taking the old Tacoma Bridge as an example, the calculated results are consistent with the field measurements.