Adjustable fluid damper with SMA actuators

Z. Q. Li, You Lin Xu, Li Min Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


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.
Original languageEnglish
Article number038
Pages (from-to)1483-1492
Number of pages10
JournalSmart Materials and Structures
Issue number5
Publication statusPublished - 1 Oct 2006

ASJC Scopus subject areas

  • Signal Processing
  • Atomic and Molecular Physics, and Optics
  • Civil and Structural Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering


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