中文摘要：

基于MSC．MARC和PYTHON脚本语言在综合考虑静风荷载非线性和结构几何非线性影响的基础上，利用风荷载增量与双重迭代（结构几何非线性收敛迭代和风荷载三分力系数收敛迭代）相结合的方法，对大跨度悬索桥空气静力行为和失稳全过程进行了分析。通过分别加大三分力系数中某个分量的方式，揭示了气动力系数对静风稳定性的影响，讨论了不同初始攻角下大跨度悬索桥梁静风失稳的发展路径，并对比分析了静风稳定线性和非线性两种计算方法的差异。

英文摘要：

MSC. MARC and PYTHON scripts were used to develop the controlling procedure to analyze the aerostatic stability of long span suspension bridges. Considering the effects of geometric nonlinearity and the aerostatic load nonlinearity, aerostatic load increment and double iterations（geometric nonlinearity iteration and aerodynamic coefficient interation）were combined to analyze the aerostatic stability of the long span bridge. The effects of aerodynamic coefficients to aerostatic stability were illustrated by respectively incresing one of the aerodynamic coefficients. Further the evolution of the aerostatic stability with the curves of aerodynamic coefficients was investigated at different intial attack angles. Also, linear and nonlinear methods of the aerostatic stability were compared.