Analytical and Experimental Study of Eddy Current Damper for Vibration Suppression in a Footbridge Structure
Analytical and Experimental Study of Eddy Current Damper for Vibration Suppression in a Footbridge Structure
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DOI：
10.1007/978-3-319-54777-0_17
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发表时间：
2017-06
期刊：
影响因子：
--
通讯作者：
W. Ao;P. Reynolds
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文献类型：
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作者：
W. Ao;P. Reynolds
涡流阻尼近年来得到了广泛的发展，并广泛应用于机械工程领域，例如铁路和涡轮制动系统以及汽车振动控制系统。土木工程结构的振动控制方法通常仍然依赖于更传统的方法，例如粘性阻尼器和调谐质量阻尼器。新型涡流阻尼装置的使用有可能补充这些传统方法，也是这里介绍的工作重点。涡流阻尼器（ECD）是一种电磁感应阻尼器，由永磁体、导体和框架组件组成。在本研究中，开发并研究了 ECD，以提供粘性阻尼器的替代方案，粘性阻尼器经常表现出由摩擦引起的不良非线性特性。由于 ECD 的运动部件不接触，因此摩擦的影响可以忽略不计。有限元模型最初用于评估 ECD 阻尼特性，并应用于人行桥结构。有限元和分析结果表明，在随机和谐波信号输入下，阻尼效果得到了令人满意的增强。
Eddy current damping has been extensively developed in recent years and is widely used in the mechanical engineering sector, for example, in railway and turbine braking systems as well as in car vibration control systems. Vibration control approaches for civil engineering structures still usually rely on more traditional approaches, such as viscous and tuned mass dampers. The use of novel Eddy current damping devices has the potential to complement these traditional approaches and is the focus of the work presented here.The Eddy current damper (ECD), which is a kind of electromagnetic induction damper, comprises a permanent magnet, a conductor and framing components. In this study, an ECD is developed and investigated to provide an alternative to viscous dampers that often exhibit undesirable non-linear characteristics arising from friction. Since the moving components of an ECD are not in contact, the influence of friction is negligible. A finite element model is initially used to evaluate the ECD damping properties and employed on a footbridge structure. The finite element and analytical results demonstrate satisfactory augmentation of damping effect under both random and harmonic signal input.