Results 171 to 180 of about 1,463,429 (213)

The conceptual design of the squeeze film damper and variable structure damper

2013 IEEE International Symposium on Assembly and Manufacturing (ISAM), 2013
The Squeeze film damper has been extensively researched for engineering application. The conceptual design work in this article includes the description, induction and classification of the squeeze film damper structure, and a brief analysis of the structural features and performance characteristics.
null Runlin Chen, null Wu Ouyang, null Jimin Xu, null Xiaoyang Yuan, null Yan Li   +4 more
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Experimental Pressures and Film Forces in a Squeeze Film Damper

Journal of Tribology, 1993
The effect of whirl frequency and lubricant viscosity on the dynamic pressures and force response of an open end and a partially sealed squeeze film dampers (SFD) with a radial clearance of 0.38 mm is determined experimentally. The experiments are carried out in a damper test rig executing circular centered orbits and for whirl frequencies ranging from
G. L. Arauz, L. A. San Andres
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Sealing Effect on the Performance of Squeeze Film Damper

Volume 3: Heat Transfer, Parts A and B, 2009
Seals used in the squeeze film damper restrict the side leakage of the lubricant, thus providing a measure of additional damping. In this paper, the serrated piston ring and end-plate seals are studied numerically using CFD-ACE+, a commercially available finite volume based algorithm.
Changhu Xing, Minel J. Braun, Hongmin Li
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A Study of a Dual Clearance Squeeze Film Damper

ASME/STLE 2009 International Joint Tribology Conference, 2009
Squeeze film dampers (SFD) are devices utilized to control vibrations of the shafts of high-speed rotating machinery. A dual squeeze film damper (DSFD) consists of two squeeze film bearings that are separated by a sleeve, which is released when the rotor experiences abnormal operating conditions.
L. Moraru, T. G. Keith, F. Dimofte, S. Cioc, D. P. Fleming   +4 more
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Pressurized Oil Squeeze Film Dampers

Journal of Lubrication Technology, 1980
A pressurized oil squeeze film damper supporting a rigid rotor mounted in antifriction bearings is investigated. Orifice and inherent feed inlets are examined, and it is shown that the clearance determines the inlet resistance for a groove or slot. The film stiffness and damping forces are determined as a function of the restrictor coefficient, rotor ...
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An Appraisal of a Proposed Active Squeeze Film Damper

Journal of Tribology, 1991
A theoretical model for an active squeeze film damper (SFD) is introduced. The design makes it possible to change the radial clearance and land length of the SFD by adjusting the position of the damper ring. Expressions for the oil film forces are obtained.
C. Mu, J. Darling, C. R. Burrows
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Nonlinear Response of Short Squeeze Film Dampers

Journal of Lubrication Technology, 1980
This paper considers the methodology of numerical integration for prediction of dynamic response of squeeze film damper systems. A planar rotor carried in a squeeze film damper with linear centering spring is considered. Governing differential equations are expressed in polar coordinates, and fluid forces are obtained from the Ocvirk short bearing ...
D. L. Taylor, B. R. K. Kumar
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Optimal Design of Centered Squeeze Film Dampers

13th Biennial Conference on Mechanical Vibration and Noise: Rotating Machinery and Vehicle Dynamics, 1991
Abstract A two degree-of-freedom model, consisting of a rigid rotor supported on rigid bearings which are in turn supported on squeeze film dampers, is considered. Isotropic centering springs are assumed resulting in a steady synchronous centered circular response for the rotor. The resulting nonlinear system is modeled in nondimensional
Nataraj, C., Ashrafiuon, Hashem.
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Stability analysis of intershaft squeeze film dampers

Journal of Sound and Vibration, 1991
Abstract Intershaft squeeze film dampers have been investigated for damping of dual rotor aircraft jet engines. Initial investigations indicated that the intershaft dampers would attenuate the amplitude of the engine vibration and decrease the force transmitted through the intershaft bearing, thereby increasing its life.
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Linear Force Coefficients for Squeeze-Film Dampers

Journal of Lubrication Technology, 1983
This paper presents a simplifed analysis of viscous squeeze-film damper behavior. It makes use of the notation of averaged inertia and calculates linear velocity and inertia coeffcients. These coefficients are shown to be accurate at practical values of the length/diameter ratio and the gap Reynolds number of the viscous damper.
A. Z. Szeri, A. A. Raimondi, A. Giron-Duarte   +2 more
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