Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21154
Title: Adjustable fluid damper with SMA actuators
Authors: Li, ZQ
Xu, YL 
Zhou, LM 
Issue Date: 2006
Publisher: Institute of Physics Publishing
Source: Smart materials and structures, 2006, v. 15, no. 5, 038, p. 1483-1492 How to cite?
Journal: Smart materials and structures 
Abstract: The passive fluid damper is one of most widely used control devices for mitigating the vibration of stay cables in a cable-stayed bridge in practice. However, each stay cable features unique dynamic characteristics and requires a specific damper to achieve the best vibration mitigation, which engenders much trouble in the manufacture, implementation and maintenance of dampers. In this study, a novel adjustable fluid damper with shape memory alloy (SMA) actuators was developed. Instead of the fixed number of orifices in the piston head of a common fluid damper, SMA actuators were installed inside the piston head to control the number of orifices so as to change the damper parameters for the best control of a group of stay cables. The principle and design issues of the adjustable fluid damper are introduced. An adjustable fluid damper, which has ten orifices in the piston head, eight of them being controllable for achieving changes in damping at nine levels, was designed and manufactured. The performance tests of the dampers were carried out within a range of frequencies and amplitudes and for a number of open orifices and different sizes of orifice. The experimental results provide a data base for the Maxwell model of the damper and show that such a damper can provide a wide range of forces and energy dissipation capacity.
URI: http://hdl.handle.net/10397/21154
ISSN: 0964-1726
EISSN: 1361-665X
DOI: 10.1088/0964-1726/15/5/038
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