中文摘要：

为了借助简单的测力试验结果快速评价桥梁结构的颤振稳定性,利用理论分析方法给出影响桥梁颤振稳定性的系统牵连扭转运动阻尼比的简化表达式。采用Fung公式计算颤振导数A＊2,利用Scanlan公式计算颤振导数A＊1和H＊3,可以较好地将三分力系数与颤振导数联系起来。结果表明：三分力系数斜率与桥梁颤振稳定性有一定关系,主梁断面的升力系数斜率与升力矩系数斜率乘积C′LC′M越小,越有利于桥梁的颤振稳定性;当颤振导数A＊1H＊3为负值时,有利于减小气动负阻尼,对结构起到稳定作用;应用此方法可以快速对比不同方案的颤振性能,便于气动选型。

英文摘要：

In order to use the simple force test results to estimate the flutter stability of bridge quickly, simplified expressions of damping ratio about the systematic reverse movement, which influence on flutter stability of bridge were presented based on the theoretical analysis method. Fung＇s equation was used to calculate the flutter derivative A2^＊ , and Scanlan＇s equation was used to calculate the flutter derivative A1^＊ and flutter derivative H3^＊. The relationships between the three-component coefficients and flutter derivatives could be established preferably. The results show that the three-component coefficients are related to the flutter stability. The smaller the CLCM, the better the flutter stability of the bridge. It is beneficial to reduce the negative aerodynamic damping and keep the structure stable when the A1^ H3^＊ are negative. The application of this method can compare the flutter stabilities for different schemes quickly and determine the aerodynamic design easily.