Characterization and experimental validation of a squeeze film damper with MR fluid in a rotor-bearing system

L. A. Dominguez-Nuñez; G. Silva-Navarro

doi:10.1117/12.2045214

1 April 2014 Characterization and experimental validation of a squeeze film damper with MR fluid in a rotor-bearing system

L. A. Dominguez-Nuñez, G. Silva-Navarro

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Proceedings Volume 9057, Active and Passive Smart Structures and Integrated Systems 2014; 905712 (2014) https://doi.org/10.1117/12.2045214
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

The general study and applications of Magneto-Rhelogical (MR) dampers have been spread in the lasts years but only some studies have been focusing on the vibration control problems on rotor-bearings systems. Squeeze-Film Dampers (SFD) are now commonly used to passively control the vibration response on rotor-bearing systems because they can provide flexibility, damping and extend the so-called stability thresholds in rotating machinery. More recently, SFD are combined with MR or Electro-Rheological (ER) fluids to introduce a semiactive control mechanism to modify the rotordynamic coefficients and deal with the robust performance of the overall system response for higher operating speeds. There are, however, some theoretical and technological problems that complicate their extensive use, like the relationship between the centering spring flexibility and the rheological behavior of the smart fluid to produce the SFD forces. In this work it is considered a SFD with MR fluid and a set of circular section beams in a squirrel cage arrangement in combination with latex seals as centering springs. The mathematical model analysis includes the controllable viscoelastic properties associated to the MR fluid. The characterization of the SFD is made by the determination of some coefficients associated with a modified Choi-Lee-Park polynomial model. During the analysis is considered a rotor-bearing system modeled using finite element methods. The SFD with MR fluid is connected to an experimental platform to validate and experimentally evaluate the overall system. Finally, to improve the open-loop system performance, a methodology for the use of different control schemes is proposed.

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L. A. Dominguez-Nuñez and G. Silva-Navarro "Characterization and experimental validation of a squeeze film damper with MR fluid in a rotor-bearing system", Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 905712 (1 April 2014); https://doi.org/10.1117/12.2045214

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KEYWORDS

Control systems

Systems modeling

Fluid dynamics

Mathematical modeling

Finite element methods

Electromagnetism

Latex

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