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TECHNICAL PAPERS

Study of a Novel Squeeze Film Damper and Vibration Generator

[+] Author and Article Information
C. V. Suciu, M. D. Pascovici

Department of Machine Elements and Tribology, “Politehnica” University of Bucharest, 313 Splaiul Independentei, 79590 Bucharest 6, Romania

O. Bonneau, J. Fre⁁ne

Laboratoire de Mecanique des Solides, University of Poitiers, SP2MI-Bd 3 Teleport 2, BP 179, 86960 Futuroscope Cedex, France

D. Brun-Picard

Laboratoire Sols Solides Structures, National Polytechnic Institut of Grenoble, Domaine Universitaire, BP53, 38041 Grenoble Cedex 9, France

J. Tribol 122(1), 211-218 (Jan 19, 1999) (8 pages) doi:10.1115/1.555345 History: Received October 28, 1997; Revised January 19, 1999
Copyright © 2000 by ASME
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References

Figures

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SFD&VG—Rayleigh step geometry
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Elliptical SFD&VG: (a) SFD&VG longitudinal view. (b) Frontal view of elliptical stator and rotor. (c) Pictorial view of stator and rotor.
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Dimensionless damping and hydrodynamic wedge load versus ξ (λ̄=1/2 and H=1)
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Elliptical SFD&VG—planar calculus configuration (major axes of elliptical rotor and stator separated by angle α)
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Dimensionless pressure distributions p̄ for zones Z11 and Z12, α=30 deg (pure squeeze film effect)
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Dimensionless pressure distributions p̃ for Z11 and Z12, α=30 deg (pure hydrodynamic wedge effect)
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Load capacity F̄ versus α
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Load capacity F̃ versus α, for H=1
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SFD&VG dynamic simulation: (a) ASFD regime; α=0 deg. (b) ASFD regime; α=90 deg. (c) Vibrations generator regime; a*=8.1 μm.
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Vibration measurements on SFD&VG, ASFD regime (η=0.55 Ns/m2;(h1)0=200 μm;Ks=1.3⋅105 N/m): (a) Vibration spectrum, measured using accelerometers, for α=0 deg. (b) Vibration spectrum, measured using accelerometers, for α=90 deg.
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Vibration measurements on SFD&VG, vibration generator regime (Ks=1.3⋅105 N/m): (a) Vibration spectrum, measured using accelerometers (η=0.57 Ns/m2;(h1)0=50 μm). (b) Oscillatory displacement recorded in time, measured using eddy-current sensor (η=0.57 Ns/m2;(h1)0=50 μm).
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Damping factors ratio ζ/ζmax versus rotation angle α (ASFD regime; theoretical and experimental results)

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