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Feasibility study of a large-scale tuned mass damper with eddy current damping mechanism

ISSN号：1671-3664
期刊名称：《地震工程与工程振动：英文版》
时间：0
分类：TU352.1[建筑科学—结构工程] TB333[一般工业技术—材料科学与工程]
作者机构：[1]Wind Engineering Research Center, Hunan University, Changsha 410082, China, [2]School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
相关基金：State Key Program of Natural Science Foundation of China Under Grant No. 50738002

作者： Wang Zhihao[1,2], Chen Zhengqing[1], Wang Jianhui[1]

关键词：调谐质量阻尼器, 阻尼机制, 电涡流, 战区导弹防御系统, 结构振动控制, TMDS, 性能测试, ECD, tuned mass damper, eddy current damping, permanent magnets, conductive plate, modal damping ratio

中文摘要：

调节集体 dampers (TMD ) 广泛地在最近的年里被使用了减轻结构的颤动。然而，在 TMD 采用的抑制机制主要基于粘滞 dampers，有几著名劣势，。或者，回旋当前的抑制(ECD ) 那不要求与主要结构的任何接触是一个潜在的答案。这份报纸讨论设计，分析，制造并且基于 ECD 大规模水平 TMD 测试。首先， ECD 的理论模型被提出，然后，用 ECD 的一大规模水平 TMD 被构造，并且最后， TMD 的表演测试被进行。当抑制比率由于 ECD 是主导的抑制来源时，测试结果证明建议 TMD 有很低的内在的抑制比率，它能在一种合适的配置象 15% 一样大。另外，与理论模型一起估计的抑制比率与那些从测试结果识别了粗略地一致，并且这个错误的来源被调查。而且，在建议 TMD 的抑制比率能被改变在永久磁铁和传导性的盘子之间的空气差距容易调整，这被表明。鉴于实际应用，为建议 TMD 的可能的改进和可行性考虑然后被讨论。有 ECD 的建议 TMD 为在结构的颤动控制的使用可靠、可行，这被证实。

英文摘要：

Tuned mass dampers （TMDs） have been widely used in recent years to mitigate structural vibration. However, the damping mechanisms employed in the TMDs are mostly based on viscous dampers, which have several well-known disadvantages, such as oil leakage and difficult adjustment of damping ratio for an operating TMD. Alternatively, eddy current damping （ECD） that does not require any contact with the main structure is a potential solution. This paper discusses the design, analysis, manufacture and testing of a large-scale horizontal TMD based on ECD. First, the theoretical model of ECD is formulated, then one large-scale horizontal TMD using ECD is constructed, and finally performance tests of the TMD are conducted. The test results show that the proposed TMD has a very low intrinsic damping ratio, while the damping ratio due to ECD is the dominant damping source, which can be as large as 15% in a proper configuration. In addition, the damping ratios estimated with the theoretical model are roughly consistent with those identified from the test results, and the source of this error is investigated. Moreover, it is demonstrated that the damping ratio in the proposed TMD can be easily adjusted by varying the air gap between permanent magnets and conductive plates. In view of practical applications, possible improvements and feasibility considerations for the proposed TMD are then discussed. It is confirmed that the proposed TMD with ECD is reliable and feasible for use in structural vibration control.

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