限位装置对斜拉索风雨激振的减振研究

由于拉索风雨激振问题的复杂性，有效的减振方法有待于进一步的探索。文章在Den Hartog驰振机理的基础上，通过对在拉索端部附近安装限位装置来抑制风雨激振的措施进行研究，用有限元方法模拟了斜拉索风雨激振现象，分析了安装限位装置后拉索的振动，解明了安装限位装置前后拉索的振动特性。经比较得知，限位装置能够有效地抑制拉索发生大幅风雨激振。并详细讨论了施加限位装置后，各相关参数对减振效果的影响规律，为今后桥梁工程设计提供理论依据。

Research on a Mitigation Device of Stayed-cable Rain/Wind-induced Vibration

Due to the question of stayed-cable rain/wind-induced vibration is complexity; further studies are required on effective methods to mitigate the vibration. This paper based on the Den Hartog＇s galloping theory, a device, which was designed to restrain larger displacement of a stayed-cable, was analyzed numerically. Using finite element method to simulate the stayed-cable rain/wind-induced vibration, the vibration of stayed-cable after installing vibration mitigation device was analyzed; studies were carried out to make clear the characteristics of the dynamic behaviors of the device. Results after comparison show that the device could mitigate effectively the vibration of a stayed-cable induced by rain/wind and a detailed discussion on the effect of vibration reduction by the related parameters after installing the vibration mitigation device was carried out, and it could provide a theory for the further bridge engineering practice.