Abstract
Instability in rotating machinery may be caused by different effects like oil film forces in journal bearings or forces in contactless seals. A machine designer needs to know, whether a rotor will run stable during operation and what size the stability threshold speed will have. Furthermore he needs information about the parameters influencing the stability. This chapter treats the special system of a rigid rotor, running in two oil film bearings. The equations of motion are derived and the stability behavior is evaluated by means of the complex eigenvalues. Analysis results show a good correlation with measurement results from a test rig.
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References
Glienicke, J.: Experimental Investigation of the Stiffness and Damping Coefficients of Turbine Bearings and Their Application to Instability Prediction. Symposium in Nottingham. The Institution of Mechanical Engineers, 1966.
Nordmann, R.: Identification of Stiffness and Damping Coefficients of Journal Bearings by Means of the Impact Method. Dynamics of Rotors, CISM Course. Springer-Verlag Wien-New York, 1984.
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© 1988 Springer-Verlag Wien
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Nordmann, R. (1988). Stability of Rotors. In: Rieger, N.F. (eds) Rotordynamics 2. International Centre for Mechanical Sciences, vol 297. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2846-6_8
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DOI: https://doi.org/10.1007/978-3-7091-2846-6_8
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-82091-9
Online ISBN: 978-3-7091-2846-6
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