Abstract: ANSYS in used widely in bridge engineering with opened second-development system .The Multi-mode Participating and Single Parameter searching method (M-S method)is introduced briefly at first , and then the according program , which is used to implement wind-induced flutter analysis of long-span bridge using visual fortran based onM-S method in ANSYS , is developed by the authors of the paper .The example of Humen Suspension Bridge illusrates the whole procedure of wind-induced flutter analysis in ANSYS , the result shows accordingly with result of wind tunnel test and the program NACS developed by authors

Key words: long-span bridge , wind-induced flutter , ANSYS second development

摘要： 首先简要介绍了桥梁风致颤振分析的多模态参与单参数搜索M-S法的基本理论以及ANSYS二次开发的几种 方法，然后以VisualFortran为二次开发平台，运用M-S法编写了在ANSYS中实现大跨度桥梁风致颤振分析的计算 程序和相应的界面菜单程序。最后通过算例展示了在ANSYS中进行颤振分析的整个过程，其计算结果与大跨度桥 梁空间静、动力分析程序NACS和风洞试验数据基本一致，说明了计算程序的可靠性

关键词: 大跨度桥梁, 风致颤振, ANSYS二次开发