以某悬索桥设计方案为工程背景 ,应用多模态颤振分析方法 ,分析了该桥架设阶段颤振临界风速的发展趋势。以其中最危险的架设阶段为例 ,研究了在主缆与主梁之间设置交叉索这种结构措施提高系统颤振稳定性的效果。分析结果表明 ,交叉吊索可以显著地改善方案桥主梁架设阶段的颤振稳定性 Taking a suspension bridge design as the engineering background, the multi-modal flutter analysis method is used to analyze the development trend of the flutter critical wind speed at the erection stage of the bridge. Taking the most dangerous stage of erection as an example, this paper studies the effect of setting up cross-cables between the main cable and the main girder to improve the flutter stability of the system. The analysis results show that the cross slings can significantly improve the flutter stability of the erection stage of main girder