Comptes Rendus
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Unbalance-induced whirl of a rotor supported by oil-film bearings
Comptes Rendus. Mécanique, Volume 349 (2021) no. 2, pp. 371-389.

This paper presents a nonlinear stability analysis of an unbalanced rotor-bearing system using the numerical continuation method and the numerical integration method. In this study, the effect of unbalance on journal motion is highlighted and a relationship is established between the bifurcation diagram of a balanced rotor and that of an unbalanced rotor. The results show that the stable operating speed range, the shaft motion type, the whirl speed and the chaotic motion occurrence depend on the unbalance level, the bearing geometry, the oil viscosity, and the speed range of unstable limit cycles existence.

Reçu le :
Révisé le :
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DOI : 10.5802/crmeca.83
Mots clés : Nonlinear stability analysis, Numerical continuation, Unbalanced rotor, Whirl speed, Chaotic motion, Hydrodynamic forces, Unstable limit cycles
Radhouane Sghir 1, 2

1 Laboratory of Mechanical Engineering, National Engineering School of Monastir, University of Monastir, Avenue Ibn Eljazzar, 5019 Monastir, Tunisia
2 National Engineering School of Sousse, University of Sousse, Sousse Technological Center, Sahloul Belt Road, 4054 Sousse, Tunisia
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits
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     title = {Unbalance-induced whirl of a rotor supported by oil-film bearings},
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Radhouane Sghir. Unbalance-induced whirl of a rotor supported by oil-film bearings. Comptes Rendus. Mécanique, Volume 349 (2021) no. 2, pp. 371-389. doi : 10.5802/crmeca.83. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.83/

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