颤振稳定性已成为影响和控制大跨径悬索桥设计的一个重要问题。运用大跨径桥梁三维非线性颤振分析方法 ,以润扬长江大桥为背景 ,对一些设计参数 ,如桥跨布置、矢跨比、边主跨比、加劲梁的高度和恒载集度等 ,进行了颤振的参数分析 ,并指出了影响大跨径悬索桥颤振稳定性的主要设计参数 Flutter stability has become an important issue affecting and controlling the design of long-span suspension bridges. Based on the 3D nonlinear flutter analysis of long-span bridges and the Runyang Yangtze River Bridge, some design parameters such as bridge span, span-to-span ratio, span ratio of main span, height of stiffening girder, , The parametric analysis of the flutter was carried out and the main design parameters affecting the flutter stability of the long-span suspension bridge were pointed out