基于磁流变弹性体的结构抗震智能装置的非线性特性

IF 4.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Smart and Nano Materials Pub Date : 2021-09-28 DOI:10.1080/19475411.2021.1981477
Yang Yu, A. N. Hoshyar, Huan Li, Guang Zhang, Weiqiang Wang
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引用次数: 15

摘要

磁流变弹性体(MRE)由于在外磁场作用下具有可控的刚度和阻尼特性,已被证明在结构振动控制中是有效的。为了实现基于MRE装置的高性能振动控制,需要一个鲁棒且准确的模型来描述MRE装置非线性动力学。本文旨在通过对一种创新的MRE设备,即MRE隔振器进行非线性建模来实现这一目标。首先,根据MRE隔离器在各种动态试验中的实验数据,分析了该隔离器的场相关特性。然后,开发了一个现象模型来解释基于MRE的设备的这些独特特性。此外,还设计了一种改进的PSO算法来估计模型参数。基于识别结果,提出了一个广义模型来阐明不同电流下隔离器的场相关特性,并通过随机和地震激励试验数据进行了验证。基于所提出的模型,设计了一种频率控制策略,用于包含智能结构的MRE设备的半主动控制,以抑制振动。最后,利用一个三层框架模型和四个基准地震进行了数值研究,验证了基于广义电流相关模型的控制策略的性能,取得了令人满意的结果。图形摘要
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Nonlinear characterization of magnetorheological elastomer-based smart device for structural seismic mitigation
ABSTRACT Magnetorheological elastomer (MRE) has been demonstrated to be effective in structural vibration control because of controllable stiffness and damping properties with the effect of external magnetic fields. To achieve a high performance of MRE device-based vibration control, a robust and accurate model is necessary to describe nonlinear dynamics of MRE device. This article aims at realising this target via nonlinear modeling of an innovative MRE device, i.e. MRE vibration isolator. First, the field-dependent properties of MRE isolator were analysed based on experimental data of the isolator in various dynamic tests. Then, a phenomenal model was developed to account for these unique characteristics of MRE-based device. Moreover, an improved PSO algorithm was designed to estimate model parameters. Based on identification results, a generalised model was proposed to clarify the field-dependent properties of the isolator due to varied currents, which was then validated by random and earthquake-excited test data. Based on the proposed model, a frequency control strategy was designed for semi-active control of MRE devices-incorporated smart structure for vibration suppression. Finally, using a three-storey frame model and four benchmark earthquakes, a numerical study was conducted to validate the performance of control strategy based on the generalised current-dependent model with satisfactory results. Graphical abstract
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来源期刊
International Journal of Smart and Nano Materials
International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
6.30
自引率
5.10%
发文量
39
审稿时长
11 weeks
期刊介绍: The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.
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