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CLC number: TH113.1

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Received: 2002-08-29

Revision Accepted: 2002-11-21

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Bio-Design and Manufacturing  2021 Vol.4 No.5 P.514~519

10.1631/jzus.2003.0514


A disc-type magneto-rheologic fluid damper


Author(s):  ZHU Chang-sheng

Affiliation(s):  College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   cszhu@hotmail.com, zhu-zhang@zjuem.zju.edu.cn

Key Words:  Magneto-rheological fluid, Damper, Rotordynamics, Vibration, Active vibration control


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ZHU Chang-sheng. A disc-type magneto-rheologic fluid damper[J]. Journal of Zhejiang University Science D, 2021, 4(5): 514~519.

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journal="Journal of Zhejiang University Science D",
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doi="10.1631/jzus.2003.0514"
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2003.0514


Abstract: 
A disc-type magneto-rheological fluid damper operating in shear mode is proposed in this paper, which is based on the special characteristics of the magneto-rheological (MR) fluid with rapid, reversible and dramatic change in its rheological properties by the application of an external magnetic field. The magnetic field of the disc-type MR fluid damper is analysed by the finite element method; the controllability of the disc-type MR fluid damper on the dynamic behaviour of a rotor system; and the effectiveness of the disc-type MR fluid damper in controlling the vibration of a rotor system, are studied in a flexible rotor system with an over-hung disc. It is shown that the magnetic flux density of the disc-type MR fluid damper in the working areas can significantly change with the applied current in the coil; and that the dynamic behavior of the disc-type MR fluid damper can be varied by the application of an external magnetic field produced by a low voltage electromagnetic coil. The disc-type MR fluid damper can significantly change the dynamic characteristics of a rotor system, provided that the location of the disk-type MR fluid damper is carefully chosen. The disc-type MR fluid damper is a new actuator with good dynamic characteristics for rotating machinery.

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Reference

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[4]Nikolajsen, J.L. and Hoque, M.S., 1990. An electro-viscous damper for rotor applications. Journal of Vibration and Acoustics, 112(3):440-443.

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[6]Zhu, C.S., 2001a. Dynamics of a rotor supported on magneto-rheological fluid squeeze film damper. Chinese Journal of Aeronautics, 14(1):6-12.

[7]Zhu, C.S., Robb, D.A. and Ewins, D.J., 2001b. A Variable Stiffness Squeeze Film Damper for passing through the Critical Speeds of Rotors. Proceedings of IMAC-19: A Conference on Structure Dynamics, Florida, USA, 2:1264-1269.

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