本文利用新发展的桥梁三维颤振分析的状态空间法,研究了各种结构体系与其颤振形态的关系,证实了多振型耦合颤振形态的存在性,通过定义振型相似指数,找出了已往理论的适用范围与条件,由此解答了桥梁风振研究中若干理论与应用方面的问题,对如何提高桥梁的抗风能力提供了一条新途径。 In this paper, the state space method of three-dimensional flutter analysis of newly developed bridges is used to study the relationship between various structural systems and their flutter patterns, and the existence of multi-vibration-type coupled chatter patterns is confirmed. The similarity index of mode shapes is defined to identify The application scope and conditions of the past theory have solved some problems in theory and application of bridge wind vibration research, and provided a new way to improve the wind resistance of the bridge.