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Theoretical analysis, simulation, and field experiment for vibration mitigation of suspender cables/hangers using the four‐wire pendulum tuned mass damper
Computer-Aided Civil and Infrastructure Engineering ( IF 8.5 ) Pub Date : 2025-01-15 , DOI: 10.1111/mice.13412
Yonghui An, Siyuan Gong, Zhongzheng Wang, Wei Shen, Zhihao Wang, Jinping Ou

Suspender cables/hangers occupy a crucial role during the whole service life of suspension bridges/arch bridges/space structures, and their long‐term repeated vibration under corrosion and high‐stress service state will cause fatigue damage and even induce fatigue failure. To mitigate the vibration of the vertical suspender cables/hangers, a four‐wire pendulum tuned mass damper (FWPTMD) is proposed. It mainly consists of the cross bracket, four pendulum ropes, the moving mass, and four universal rotating ball hinges that can rotate in any direction and provide damping. A suspender cable in a real suspension bridge is selected as the research object. First, the design procedure and effect of the modal mass ratio are provided; the optimization design method for parameters of optimal frequency ratio and optimal damping ratio is investigated in detail. Second, simulations are conducted to illustrate its feasibility, and results show excellent vibration mitigation effect. Third, the optimal FWPTMD is designed and fabricated; its performance is further validated by field experiments, and the results are very close to those in simulation. The FWPTMD has the advantages of simple structural form, convenient installation, low cost, easy tuning, easy maintenance, and so forth. Therefore, it can play an obvious vibration mitigation role in the life‐cycle of the suspender cable/hanger, and it has a positive meaning to retard fatigue damage, extend the service life, and assure traffic safety under extreme weather.

中文翻译:


使用四线摆锤调谐质量阻尼器对吊索/吊架进行减振的理论分析、仿真和现场试验



吊索/吊架在悬索桥/拱桥/空间结构的整个使用寿命中起着至关重要的作用,它们在腐蚀和高应力使用状态下长期反复振动会引起疲劳损伤,甚至诱发疲劳失效。为了减轻垂直吊索/吊架的振动,提出了一种四线摆锤调谐质量阻尼器 (FWPTMD)。它主要由横托架、四根摆绳、移动质量以及四个可以向任何方向旋转并提供阻尼的万向旋转球铰链组成。选择真实悬索桥中的吊索作为研究对象。首先,给出了模态质量比的设计步骤和效果;详细研究了最优频率比和最优阻尼比参数的优化设计方法。其次,通过仿真验证其可行性,结果表明了优异的减振效果。再次,设计和制造最优的 FWPTMD;其性能通过现场实验得到进一步验证,结果与仿真结果非常接近。FWPTMD 具有结构形式简单、安装方便、成本低、易于调整、易于维护等优点。因此,它可以在吊索/吊架的生命周期中起到明显的减振作用,对延缓疲劳损伤、延长使用寿命、保证极端天气下的交通安全具有积极的意义。
更新日期:2025-01-15
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