节段模型弹性悬挂系统阻尼调节用电涡流阻尼器的设计与性能验证  

Design and performance verification of a novel eddy current damper for damping adjustment of the spring-suspended sectional model system

作　　者：黄智文[1,2,3] 马伟猛 冯云成 华旭刚[1,2,3] 陈政清[1,2,3] HUANG Zhi‑wen;MA Wei‑meng;FENG Yun‑cheng;HUA Xu‑gang;CHEN Zheng‑qing(Key Laboratory for Wind and Bridge Engineering of Hunan Province,Hunan University,Changsha 410082,China;School of Civil Engineering,Hunan University,Changsha 410082,China;State Key Laboratory of Bridge Safety and Resilience,Hunan University,Changsha 410082,China;CCCC First Highway Consultants Co.,Ltd.,Xi’an 710075,China)

机构地区：[1]湖南大学风工程与桥梁工程湖南省重点实验室,湖南长沙410082 [2]湖南大学土木工程学院,湖南长沙410082 [3]湖南大学桥梁工程安全与韧性全国重点实验室,湖南长沙410082 [4]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《振动工程学报》2024年第11期1826-1835,共10页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52278499)。

摘　　要：为了能够精细、连续调节风洞试验中的节段模型弹性悬挂系统阻尼,设计了一种双侧永磁板式电涡流阻尼器。介绍了该电涡流阻尼器的基本构造,并分析出其设计要点;采用电磁有限元稳态分析方法分析了该电涡流阻尼器构造的合理性,并预测了其工作量程,分析了导体板的运动速度和位置偏移对其工作性能的影响;推导出该电涡流阻尼器给节段模型悬挂系统提供的竖向和扭转附加阻尼比的关系,并利用试验验证了电涡流阻尼的线性特性及阻尼器对节段模型悬挂系统竖向和扭转附加阻尼的协同调节能力。研究表明:双侧永磁板式电涡流阻尼器可为不同缩尺比节段模型悬挂系统提供连续可调的线性黏滞阻尼,且其阻尼系数稳定,不易受模型前后、左右和上下位置偏移的影响,也适用于节段模型大幅弯扭耦合颤振风洞试验;通过沿节段模型的斜对角对称安装两台电涡流阻尼器,可实现节段模型悬挂系统竖向和扭转阻尼比的协同调节,为实现节段模型弯扭耦合风致振动的精细化研究提供了条件。In order to finely and continuously adjust the damping of a spring-suspended sectional model(SSSM)system in the wind tunnel test,a double-sided permanent magnet plate-type eddy current damper(ECD)device is developed in this paper.First,the basic structure of the ECD is introduced and its design points are analyzed.Then,the rationality of the structure for the ECD is analyzed by using the electromagnetic finite element steady-state analysis method,its working range is predicted,and the influence of the motion speed and position offset of the conductor plate on its working performance is analyzed.Finally,the relationship between the vertical and torsional additional damping ratio provided by the ECD to the SSSM system is derived,and the linear characteristics of the eddy current damping and the cooperative adjustment ability of the damper to the vertical and torsional additional damping of the SSSM system are verified by experiments.The study shows that the double-sided permanent magnet plate-type ECD can provide continuously adjustable linear viscous damping for the SSSM system with different scaling ratios,and the damping coefficient is stable and not easily affected by the front-back,left-right and up-down position offsets of the model,which is also suitable for the wind tunnel test of the SSSM system with large bending-torsional coupling vibration.By installing two dampers symmetrically along the diagonal of the SSSM system,the vertical and torsional damping ratios of the SSSM system can be cooperatively adjusted,which provides conditions for the fine study of the bending-torsional coupling wind-induced vibration of the SSSM system.

关 键 词：桥梁 风洞试验 节段模型 电涡流阻尼 阻尼器 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]