运用大跨度桥梁三维非线性颤振分析方法 ,对宜昌长江大桥进行了施工阶段加劲梁对称和非对称架设情况的颤振分析 ,探讨了施工阶段悬索桥颤振稳定性的变化规律、不同施工方法以及非线性因素对施工阶段悬索桥颤振稳定性的影响。 Using the three-dimensional nonlinear flutter analysis method of long-span bridges, the flutter analysis of the symmetrical and asymmetrical erection of the stiffening girder in the construction phase of Yichang Yangtze River Bridge is carried out. The variation regularity of the flutter stability of the suspension bridge during the construction phase is discussed. Different construction methods, Influence of Nonlinear Factors on Flutter Stability of Suspension Bridges in Construction.