Assessing the effect of nonlinearities on the performance of a tuned inerter damper
Assessing the effect of nonlinearities on the performance of a tuned inerter damper
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DOI：
10.1002/stc.1879
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发表时间：
2017-03
影响因子：
5.4
通讯作者：
A. Gonzalez-Buelga;I. Lazar;J. Z. Jiang;S. Neild;D. Inman
中科院分区：
文献类型：
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作者：
A. Gonzalez-Buelga;I. Lazar;J. Z. Jiang;S. Neild;D. Inman
在本文中，使用调谐惯性阻尼器（TID）作为吸振器的数值和实验研究，与土木工程的应用。惯性器完成了机械网络和电气网络之间的类比，作为等效于电容器的机械元件，并于21世纪初开发。最初，惯性器用于汽车工程中的应用，在那里它们被称为J-阻尼器。最近，研究表明，基于惯性器的网络可用于土木工程应用，与传统的调谐质量阻尼器相比具有有趣的优势。在土木工程方面，研究主要是理论上的，考虑理想的惰性气体。由于惯性器装置的动态特性包括非线性，特别是在与土木工程应用相关的低频下，因此在本文中对使用现成惯性器的TID装置的性能进行了实验测试。所选系统包括一个带有TID的主结构，使用真实的实时动态子结构（RTDS）或混合测试进行测试。对惯性器进行了物理测试，而TID装置的其余部件、弹簧和阻尼器以及主机结构进行了数值模拟。在数值和物理组件之间的界面处的位移和力被真实的更新。这种数值物理分离允许TID参数的优化，因为弹簧和阻尼器的值可以在不改变实验设置的情况下改变。此外，这种配置考虑到惯性器的潜在复杂的动态测试实验，连同主机结构的特性。开发RTDS测试的物理惯性子结构，其中部分反馈接口的力量是成比例的加速度，是一项具有挑战性的任务，因为在实验和数值子结构之间的接口处产生的延迟。与延迟和因果关系引起的稳定性问题相关的问题出现了，因为我们正在处理中立型和先进的延迟微分方程。提出了一种新的子结构化算法，该算法通过反馈测量的惯性力与理想惯性力的偏差来代替界面处的实际惯性力。实验结果表明，通过对TID装置中的部件进行适当的重新调谐，包含真实的惯性装置的TID的性能接近于理想的惯性装置。版权所有2016作者.《结构控制与健康监测》，John Wiley & Sons，Ltd.出版。
In this paper, the use of a tuned inerter damper (TID) as a vibration absorber is studied numerically and experimentally, with civil engineering applications in mind. Inerters complete the analogy between mechanical and electrical networks, as the mechanical element equivalent to a capacitor and were developed in the 2000s. Initially, inerters were used for applications in automotive engineering, where they are known as J‐dampers. Recently, research has suggested that inerter‐based networks could be used for civil engineering applications, offering interesting advantages over traditional tuned mass dampers. In the civil engineering context, research has been mainly theoretical, considering ideal inerters. Because the dynamics of an inerter device include nonlinearities, especially at the low frequencies associated with civil engineering applications, the performance of the TID device using an off‐the‐shelf inerter has been experimentally tested in the work presented here. The chosen system, comprising a host structure with a TID attached to it, was tested using real‐time dynamic substructuring (RTDS) or hybrid testing. The inerter was tested physically, while the remaining components of the TID device, the spring and damper, together with the host structure, were simulated numerically. Displacements and forces at the interface between numerical and physical components are updated in real time. This numerical–physical split allows the optimisation of the TID parameters, because the values of the spring and the damper can be changed without altering the experimental setup. In addition, this configuration takes into account the inerter's potentially complex dynamics by testing it experimentally, together with the characteristics of the host structure. Developing RTDS tests for physical inertial substructures, where part of the fed back interface forces are proportional to acceleration, is a challenging task because of delays arising at the interface between the experimental and the numerical substructures. Problems associated with stability issues caused by delay and causality arise, because we are dealing with neutral and advanced delayed differential equations. A new approach for the substructuring algorithm is proposed, consisting of feeding back the measured force deviation from the ideal inerter instead of the actual force at the interface. The experimental results show that with appropriate retuning of the components in the TID device, the performance in the TID incorporating the real inerter device is close to the ideal inerter device. © 2016 The Authors. Structural Control and Health Monitoring published by John Wiley & Sons, Ltd.