Results 161 to 170 of about 1,463,429 (213)
Experimental Investigation of a Simple Squeeze Film Damper
Journal of Engineering for Industry, 1974 This paper describes an experimental investigation of a squeeze film damper for the control of rotor amplitudes. From direct measurements of the transmitted force and the velocity of the damper sleeve, the damping coefficient of the squeeze film is obtained over a range of frequencies and for several values of film thickness and oil viscosity.
H. Andersen, K. K. Thomsen
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A fuzzy control for a magnetorheological squeeze-film damper
, 2004 A squeeze film damper is a device for passive vibration control of rotors. An adaptive squeeze film damper is one whose properties can be continuously adapted to minimize the amplitude of vibration of the rotor in any working condition. This paper concerns an adaptive squeeze film damper with a magneto-rheological fluid (MR): a change of its apparent ...
CARMIGNANI, COSTANTINO +2 more
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Non-Linear Behavior of a Flexible Shaft Partly Supported by a Squeeze Film Damper
Wear, 1997 International audienceHigh speed rotors pose stability problems, especially when the speed of rotation increases above a critical speed. In this case, the dynamic behavior of the fluid bearings has an important effect.
Olivier BONNEAU, Jean Frêne
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Routes to Chaos in Squeeze-Film Dampers
Design Engineering, 2004This work reports on a numerical study undertaken to investigate the imbalance response of a rigid rotor supported by squeeze-film dampers. Two types of damper configurations were considered, namely, dampers without centering springs, and eccentrically operated dampers with centering springs.
Jawaid I. Inayat-Hussain +1 more
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Application of Hydrostatic Squeeze-Film Dampers
A S L E Transactions, 1982Squeeze-film dampers are often used to improve the stability of high-speed rotating machinery. The introduction of a hydrostatic bearing as an additional damper support can further optimize the loading capacity and damping effects of the support system.
K. C. Choy, J. D. Halloran
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A Numerical Study of Squeeze Film Dampers
Volume 7B: Structures and Dynamics, 2013Squeeze film dampers (SFDs) are used in the high speed turbomachinery industry as a means to reduce vibration amplitude, provide damping, and improve dynamic stability of the rotor bearing system. Past numerical studies analyzing SFDs, have been computationally expensive and time consuming.
Praneetha Boppa +2 more
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Transitions to chaos in squeeze-film dampers
Communications in Nonlinear Science and Numerical Simulation, 2006zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Inayat-Hussain, Jawaid I. +1 more
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Squeeze Film Dampers: Amplitude Effects at Low Squeeze Numbers
Journal of Engineering for Industry, 1975Gaseous squeeze film dampers are analyzed to determine the effect of periodic disturbance amplitude on the dynamic performance. Both circular and rectangular parallel surfaces are investigated. A solution of the nonlinear Reynolds equation is obtained by expanding the pressure in powers of the squeeze number σ, retaining up to and including terms 0(σ2).
A. Kent Stiffler, Martin H. Sadd
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Effect of Squeeze Film Damper Land Geometry on Damper Performance
Tribology Transactions, 1994Variable axial land geometry dampers can significantly alter the unbalance response, and in particular, the likelihood of undesirable jump behavior, of circular orbit-type squeeze film dampers. Assuming end feed, the pressure distribution, the fluid film forces, and the stiffness and damping coefficients are obtained for such variable axial land ...
Y. H. Wang, E. J. Hahn
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Modeling Finite Squeeze Film Dampers
Volume 4: Turbo Expo 2002, Parts A and B, 2002Most closed form solutions of Reynolds’ equation assume either a short bearing approximation or a long bearing approximation. These closed form approximations are used in rotordynamic simulation applications, otherwise a Finite Difference solution of Reynolds’ equation would be prohibitively time consuming.
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