Analysis of a Torsional Fluid Film Vibrator

[+] 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

T. Iwatsubo

MS-1 Laboratory, Mechanical Engineering Department, Kobe University 1-1-1 Rokkodai, Nada, 657-8501 Kobe, Japan

J. Tribol 124(3), 480-485 (May 31, 2002) (6 pages) doi:10.1115/1.1454101 History: Received January 04, 2001; Revised June 26, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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Harris, C. M., and Crede, C. E., 1968, Shock and Vibration Handbook, McGraw-Hill, New York.
Mu,  C., Darling,  J., and Burrows,  C. R., 1991, “An Appraisal of a Proposed Active Squeeze Film Damper,” ASME J. Tribol., 113, pp. 750–754.
Bonneau, O., and Fre⁁ne, J., 1994, “Numerical Study of a Flexible Rotor Mounted in an Active Squeeze Film Damper,” 4th International Conference on Rotor Dynamics, IFTOM, Chicago, pp. 327–331.
Suciu,  C. V., Bonneau,  O., Brun-Picard,  D., Fre⁁ne,  J., and Pascovici,  M. D., 2000, “Study of a Novel Squeeze Film Damper and Vibration Generator,” ASME J. Tribol., 122, pp. 211–218.
Suciu, C. V., Pascovici, M. D., and Iwatsubo, T., 2000, “Study of a Torsional Fluid Film Vibrator,” Synopses of the International Tribology Conference, Nagasaki, Vol. 2E1-2, p. 138.
Schlichting, H., 1960, Boundary Layer Theory, McGraw-Hill, New York.
Constantinescu,  V. N., and Galetuse,  S., 1976, “Pressure Drop Due to Inertia Forces in Step Bearings,” ASME J. Lubr. Technol., F98, pp. 167–174.
Missimer,  J. R., and Thomas,  L. C., 1983, “Analysis of Transitional and Fully Turbulent Plane Couette Flow,” ASME J. Lubr. Technol., 105, pp. 365–368.
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Grahic Jump Location
Schematic view of the TFFV
Grahic Jump Location
Case of the plane parallel surfaces
Grahic Jump Location
Geometry of the TFFV in polar coordinates (Γ, θ)
Grahic Jump Location
Reverse flow at the inlet and the outlet of the step
Grahic Jump Location
Photo of the TFFV test rig and the inner jacket
Grahic Jump Location
Structural friction power versus speed (b̄=0.7;s̄=0.15;Ψ=0.0027)
Grahic Jump Location
Theoretical and experimental angular displacement versus time (b̄=0.7;s̄=0.15;Ψ=0.0027;K=4.0 N⋅m;n=4, 8, 12 r.p.s )
Grahic Jump Location
Vibration spectrum, recorded at the critical speed (b̄=0.7;s̄=0.15;Ψ=0.0027;K=4.0 N⋅m;n=8 r.p.s.)
Grahic Jump Location
Theoretical and experimental angular amplitude versus speed (ζ=0.102;s̄=0.15;Ψ=0.0027;b̄=0.7;K=2.9, 4.0, 4.8 N ⋅m )
Grahic Jump Location
Theoretical and experimental angular amplitude versus speed (ζ=0.102;s̄=0.15;Ψ=0.0027;b̄=0.3, 0.5, 0.7, 0.9; K=4.0 N⋅m)
Grahic Jump Location
Amplitude of the dimensionless viscous drag moment versus relative clearance (b̄=0.2, 0.4, 0.6; s̄=0.10; 0.15)



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