基于气动措施和滑轮式TMD的人行景观桥涡振混合控制研究  

Hybrid control of the vortex-induced vibration of a pedestrian landscape bridge based on aerodynamic measures and pulley-type TMD

作　　者：陈智 封周权[1] 陈谨林 孙秀贵 华旭刚[1] CHEN Zhi;FENG Zhouquan;CHEN Jinlin;SUN Xiugui;HUA Xugang(Hunan Provincial Key Laboratory for Wind and Bridge Engineering,Hunan University,Changsha 410082,China;Hunan Provincial Communications Planning,Survey&Design Institute Co.,Ltd.,Changsha 410200,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,长沙410082 [2]湖南省交通规划勘察设计院有限公司,长沙410200

出　　处：《振动与冲击》2024年第10期140-148,共9页Journal of Vibration and Shock

基　　金：长沙市政府采购研究项目(CSCG-202107060066);湖南省自然科学基金项目(2021JJ30106)。

摘　　要：为了解决传统式调谐质量阻尼器(tuned mass damper, TMD)在控制低频桥梁结构中弹簧静伸长过长的问题,介绍了滑轮式TMD及其用于结构振动控制时的特点,指出滑轮式TMD可以有效减小弹簧静伸长量。以一座人行景观桥为例,研究了采用气动措施和滑轮式TMD对该桥的涡振控制效果。风洞试验结果显示,在最优气动措施下,主梁的涡振振幅减少了一半以上,但仍未达到行人舒适性要求。基于Scanlan线性涡激力模型进行滑轮式TMD的优化设计,在气动措施的基础上进一步辅以滑轮式TMD进行涡振控制。分析结果表明,气动措施结合滑轮式TMD进行涡振控制能够满足行人舒适性要求,并确保滑轮式TMD质量块的工作行程不超过限值。通过同时采用气动措施和滑轮式TMD,可以满足主梁涡振限值、TMD弹簧静伸长量和工作行程等多重要求,从而有效控制主梁的涡振现象。本文提出的混合控制方案为类似工程中的涡振控制提供了有益参考,可为工程实践提供指导。To address the issue of excessive static elongation of the spring in traditional tuned mass dampers(TMDs)used for controlling low-frequency vibrations in bridge structures,the pulley-type TMD and their characteristics were introduced when it is used for structural vibration control,and it points out that the pulley-type TMD can effectively reduce the spring static elongation.Taking a pedestrian landscape bridge as an example,the effectiveness of aerodynamic measures and pulley-type TMD in controlling vortex-induced vibration(VIV)of the bridge was investigated.Wind tunnel test results demonstrate that,with optimal aerodynamic measures,the VIV amplitude of the main girder is reduced by more than half,but it still does not meet the comfort requirements for pedestrians.Based on the Scanlan linear vortex excitation force model for the optimal design of the pulley-type TMD,the vortex vibration control was further supplemented by the pulley-type TMD besides the aerodynamic measures.The results of the analysis show that aerodynamic measures combined with the pulley-type TMD for VIV control can meet the pedestrian comfort requirements and ensure that the working stroke of the pulley-type TMD mass block does not exceed the limits.By simultaneously utilizing aerodynamic measures and the pulley-type TMD,multiple requirements such as the VIV limit of the main girder,spring static elongation and working stroke of the pulley-type TMD can be met,effectively controlling the occurrence of VIV in the main girder.The proposed hybrid solution provides valuable insight for VIV control in similar engineering projects and offers guidance for engineering practice.

关 键 词：调谐质量阻尼器(TMD) 涡振控制 气动措施 滑轮式TMD 行人舒适性 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]