Dynamic Modeling of Large-Scale Magnetorheological Damper Systems for Civil Engineering Applications
Dynamic Modeling of Large-Scale Magnetorheological Damper Systems for Civil Engineering Applications
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DOI：
10.1061/(asce)0733-9399(2004)130:9(1107
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发表时间：
2004-08
期刊：
影响因子：
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通讯作者：
Guangqiang Yang;Billie F. Spencer;H. Jung;J. Carlson
中科院分区：
文献类型：
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作者：
Guangqiang Yang;Billie F. Spencer;H. Jung;J. Carlson
磁流变阻尼器是一种很有前途的新型结构减振装置。由于其机械简单性、高动态范围、低功率要求、大力容量和鲁棒性，这些装置已被证明能够很好地满足地震和风力工程应用需求和限制。磁流变阻尼器的准静态模型已经被研究者研究。虽然这些模型对阻尼器设计有用，但不足以描述MR阻尼器在动态载荷下的行为。本文提出了一个新的动态模型的整个磁流变阻尼器系统，其中包括两个部分：（1）动态模型的电源和（2）动态模型的磁流变阻尼器。由于先前的研究已经证明，电流驱动的电源可以大大减少磁流变阻尼器的响应时间，本研究采用电流驱动器的磁流变阻尼器供电。电流驱动器的工作原理，并提供了适当的动态模型。随后，磁流变阻尼器的力响应分析，并提出了一个唯象模型的基础上Bouc-Wen模型来估计磁流变阻尼器在动态载荷下的行为。该模型考虑了磁流变流体的静摩擦现象，以及流体的惯性和剪切变稀效应。与基于Bouc-Wen模型的其他类型的模型相比，所提出的模型已被证明是更有效的，特别是在描述力滚降在低速区域，力超调时，速度的符号变化，和两个顺时针方向的滞后环在速度极值。
Magnetorheological (MR) dampers are one of the most promising new devices for structural vibration mitigation. Because of their mechanical simplicity, high dynamic range, low power requirements, large force capacity, and robustness, these devices have been shown to mesh well with earthquake and wind engineering application demands and constraints. Quasistatic models of MR dampers have been investigated by researchers. Although useful for damper design, these models are not sufficient to describe the MR damper behavior under dynamic loading. This paper presents a new dynamic model of the overall MR damper system which is comprised of two parts: (1) a dynamic model of the power supply and (2) a dynamic model of the MR damper. Because previous studies have demonstrated that a current-driven power supply can substantially reduce the MR damper response time, this study employs a current driver to power the MR damper. The operating principles of the current driver, and an appropriate dynamic model are provided. Subsequently, MR damper force response analysis is performed, and a phenomenological model based on the Bouc-Wen model is proposed to estimate the MR damper behavior under dynamic loading. This model accommodates the MR fluid stiction phenomenon, as well as fluid inertial and shear thinning effects. Compared with other types of models based on the Bouc-Wen model, the proposed model has been shown to be more effective, especially in describing the force rolloff in the low velocity region, force overshoots when velocity changes in sign, and two clockwise hysteresis loops at the velocity extremes.