Tytuł artykułu
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Wybrane pełne teksty z tego czasopisma
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Warianty tytułu
Konferencja
8th International Conference on Numerical Methods in Continuum Mechanics (September 19-24, 2000 ; Liptovsky Ján, Low Tatras ; Slovakia)
Języki publikacji
Abstrakty
For some combinations of rotor speed and radial load, the pressure field of bearing fluid can perturb the pure rotational motion and disturb the normal operation of a rotating machine. Classical approach to the stability analysis of Jeffcott rotor in fluid-film bearings is modelling bearings as spring-damper elements and disregarding the external rotor damping [1,2]. Nonlinear models are used to verify results obtained from a linearized model. This paper deals with the influence of external rotor damping on the size of stability regions. Stability analysis of the Jeffcott rotor in fluid-film bearings is performed by using both the linear model based on the linearization of bearing force around the static equilibrium position and the nonlinear model of the velocity linearization [3,4].
Słowa kluczowe
Rocznik
Tom
Strony
573--581
Opis fizyczny
Bibliogr. 14 poz., wykr.
Twórcy
autor
- University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Department of Engineering Mechanics, PO Box 102, 10 002 Zagreb, Croatia
autor
- University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Department of Engineering Mechanics, PO Box 102, 10 002 Zagreb, Croatia
autor
- University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Department of Engineering Mechanics, PO Box 102, 10 002 Zagreb, Croatia
Bibliografia
- [1] D. Childs. Turbomachinery Rotordynarnics. John Wiley, New York... Singapore, 1993.
- [2] S.H. Crandall. The instability mechanism responsible for oil whirl and oil whip. In: - ed., Proceedings of Greek National Congress on Mechanics, 659-672. Democritus University of Thrace, Xanthi, 1995.
- [3] S.H. Crandall. Velocity linearisation of the dynamic response of fluid-film bearings. In: L. Pust, ed., Proceedings of European Nonlinear Oscillation Conference, 119-124. Institute of Thermomechanics, Prague, 1996.
- [4] G. Genta. Vibration of Structures and Machines. Springer, New York…Tokyo, 1999.
- [5] E. Krämer. Dynamics of Rotors and Foundations. Springer-Verlag, Berlin...Budapest, 1993.
- [6] M. Lahmar, A. Haddad, D. Nicolas. An optimised short bearing theory for nonlinear dynamic analysis of turbulent journal bearings. European Journal of Mechanics, 19(1): 151-177, 2000.
- [7] J.W. Lund. Self-Excited Stationary Whirl Orbits of a Journal in a Sleeve Bearing. Ph.D. Thesis, Rensselaer Polytechnic Institute, Troy, N.Y., 1966.
- [8] J.W. Lund. Review of the concept of dynamic coefficients for fluid-film journal bearings. Journal of Tribology, 109: 37-41, 1987.
- [9] A. Muszyńska. Whirl and whip-rotor/bearing stability problems. Journal of Sound and Vibration, 110(3): 443-462, 1986.
- [10] F. Ocvirk. Short Bearing Approximation for Full Journal Bearings. NACA TN 20808, 1952.
- [11] H. Poritsky. Contribution of the theory of oil whip. Transactions of the ASME, 75: 1153-1161, 1953.
- [12] T. Someya. Journal-Bearing Data Book. Springer-Verlag, Berlin... Tokyo, 1989.
- [13] M. Stegić N. Kranjčević, N. Vranković. Computational stability analysis of Laval rotor in journal bearings. Mechanical Engineering (Slovak Journal), 50: 346-358, 1999.
- [14] N. Vranković, M. Stegić, N. Kranjćević. Linear force-velocity model for stability analysis of Laval rotor in bearings. In: W. Wunderlich, ed., Proceedings of European Conference on Computational Mechanics, CD-ROM, paper 400.pdf:1-12. Lehrstuhl für Statik TU München, Munich, 1999.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPB2-0006-0084