基于套筒阻尼器的悬索桥吊索振动控制方法  

Suspension Bridge Cable Vibration Control Method Based on Tube Damper

作　　者：赵洪伟 陈一飞 孙宗光 ZHAO Hong-wei;CHEN Yi-fei;SUN Zong-guang(School of Transportation Engineering,Dalian Maritime University,Dalian,Liaoning 116026,China;School of Transportation Engineering,Dalian Jiaotong University,Dalian,Liaoning 116028,China)

机构地区：[1]大连海事大学交通运输工程学院,辽宁大连116026 [2]大连交通大学交通工程学院,辽宁大连116028

出　　处：《公路交通科技》2024年第12期137-146,共10页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51178070);中央高校基本科研业务费专项资金项目(3132014326,3132016216);辽宁省教育厅自然科学研究青年项目(JDL2020018)。

摘　　要：针对悬索桥吊索的振动问题,提出了一种套筒阻尼器振动控制方法,旨在降低吊索振幅、加快振动衰减,延长吊索寿命,提高桥梁安全耐久性能。首先,推导了安装套筒阻尼器的索结构运动特性方程,确定影响振动的主要参数,并以参数作为控制变量进行后续的分析、比较、筛选;其次,建立有限元模型,以阻尼比作为减振性能评价指标,通过数值模拟的方法分析各主要参数对吊索-套筒阻尼器阻尼比的影响;随后,采用响应曲面法实现多参数耦合的减振优化设计,分别对套筒刚度、质量比、橡胶阻尼材料、吊索-套筒间隙,进行交互试验分析,获取最优参数组合;最后,假定两端固定约束条件下分别对单吊索和带有套筒阻尼器的吊索施加相同激励进行定量分析,研究在不同激励荷载条件下套筒阻尼器减振性能的变化情况,对比安装阻尼器后吊索动力学响应,验证设计的合理性。研究结果表明,套筒阻尼器能够有效降低索的振动位移幅值,当吊索受到特定频率外界激励荷载作用下产生共振,套筒阻尼器将有效避免共振现象导致的大幅度位移变形现象发生,降低结构疲劳损伤的风险。Due to the problem of suspension bridge cable vibration,a tube damper vibration control method was proposed,aiming to reduce the cable amplitude,accelerate the vibration attenuation,prolong the cable life,and improve the bridge safety and durability performance.First,the motion characteristic equations of cable structure installed with tube damper were derived to determine the main parameters affecting vibration.The parameters were used as the control variables for subsequent analysis,comparison and screening.Second,the finite element model was established.The damping ratio was used as the vibration damping performance evaluation indicator to analyze the influence of each main parameter on cable-tube damper damping ratio by means of numerical simulation.Subsequently,the response surface method was adopted to realize the optimized vibration damping design with multi-parameter coupling.The interaction test analysis was carried out on the tube stiffness,mass ratio,rubber damping material,and cable-tube gap to obtain the optimal parameter combinations.Finally,the same excitation was applied to a single cable and a cable with tube damper under the assumption of fixed constraints at both ends to carry out the quantitative analysis.The variations of damping performance under different excitation loads were studied.Compare with the cable dynamic response after damper installation,so as to validate the rationality of design.The result indicates that the tube damper can effectively reduce the cable vibration displacement amplitude.When the cable is subjected to a specific frequency of external excitation load resonance,the tube damper will effectively avoid the resonance phenomenon caused by the occurrence of large displacement deformation phenomenon,reducing the structural fatigue damage risk.

关 键 词：桥梁工程 吊索阻尼器 有限元分析 振动控制 吊索 

分 类 号：U443[建筑科学—桥梁与隧道工程]