节段模型弹簧悬挂颤振试验中的滞回现象研究  

Study on Hysteresis Phenomenon in Section Model Spring Suspension Flutter Test

作　　者：李宏杰 LI Hongjie(Tianjin Municipal Engineering Design&Research Institute Co.Ltd.,Tianjin 300392,China)

机构地区：[1]天津市政工程设计研究总院有限公司,天津300392

出　　处：《天津建设科技》2023年第2期7-11,共5页Tianjin Construction Science and Technology

摘　　要：为了研究桥梁颤振运动的非线性特征,进行了平板节段模型弹簧悬挂风洞试验,通过调节系统的机械阻尼比,在不同阶段给予模型外部激励。结果表明:颤振除传统的“软颤振”与“硬颤振”模式外,还有第三种颤振即“颤振滞回”,系统的阻尼是引起“颤振滞回”的主要因素。In order to study the nonlinear characteristics of bridge flutter motion,this paper adopts the method of wind tunnel test of flat section model spring suspension,through adjusting the mechanical damping ratio of the system and giving external excitation to the model at different stages.The results show that in addition to the traditional vibration modes of"soft flutter"and"hard flutter",there is a third kind of flutter,namely"flutter hysteresis",the damping of the system is the main factor causing the"flutter hysteresis"phenomenon.

关 键 词：风洞试验 非线性颤振 平板节段模型 桥梁 阻尼比 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]