Smart Structures and Systems

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Development of a full-scale magnetorheological damper model for open-loop cable vibration control

  • Zhang, Ru (Department of Civil Engineering, Zhejiang University City College) ;
  • Ni, Yi-Qing (Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University) ;
  • Duan, Yuanfeng (College of Civil Engineering and Architecture, Zhejiang University) ;
  • Ko, Jan-Ming (Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University)
  • Received : 2018.09.25
  • Accepted : 2019.01.17
  • Published : 2019.06.25
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Abstract

Modeling of magnetorheological (MR) dampers for cable vibration control to facilitate the design of even more effective and economical systems is still a challenging task. In this study, a parameter-adaptive three-element model is first established for a full-scale MR damper based on laboratory tests. The parameters of the model are represented by a set of empirical formulae in terms of displacement amplitude, voltage input, and excitation frequency. The model is then incorporated into the governing equation of cable-damper system for investigation of open-loop vibration control of stay cables in a cable-stayed bridge. The concept of optimal voltage/current input achieving the maximum damping for the system is put forward and verified. Multi-mode suboptimal and Single-mode optimal open-loop control method is then developed. Important conclusions are drawn on application issues and unique characteristics of open-loop cable vibration control using MR dampers.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Ministry of Science and Technology of China, Council of the Hong Kong Special Administrative Region, The Hong Kong Polytechnic University

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