Modeling of a full-scale MR damper and its application in open-loop vibration control of stay cables

J. M. Ko; Y. F. Duan; Y. Q. Ni

doi:10.1117/12.599706

17 May 2005 Modeling of a full-scale MR damper and its application in open-loop vibration control of stay cables

J. M. Ko, Y. F. Duan, Y. Q. Ni

Proceedings Volume 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2005) https://doi.org/10.1117/12.599706
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

A parameter-adaptive three-element model is first developed 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, by installing the dampers in single- and twin-damper setups respectively. The concept of optimal voltage/current input achieving the maximum damping for the system is put forward and verified. Multi-mode and multi-switch open-loop control methods in single- and twin-damper setups are then developed and a procedure for determining optimal geometric configuration of the twin-damper setup is proposed. The developed analytical formulations and design methods contribute to consummating the design specifications/guidelines for open-loop cable vibration control using MR dampers.

Citation Download Citation

J. M. Ko, Y. F. Duan, and Y. Q. Ni "Modeling of a full-scale MR damper and its application in open-loop vibration control of stay cables", Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); https://doi.org/10.1117/12.599706

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