Whirl and whip—Rotor/bearing stability problems
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In this paper, a mathematical model of an unloaded symmetric rotor supported by one rigid and one fluid lubricated bearing is proposed, where the rotor model is represented by generalized (modal) parameters of its first bending mode.About:
This article is published in Journal of Sound and Vibration.The article was published on 1986-11-08 and is currently open access. It has received 270 citations till now. The article focuses on the topics: Rotor (electric) & Squirrel-cage rotor.read more
Citations
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Stick-Slip Whirl Interaction in Drillstring Dynamics
TL;DR: In this paper, a stick-slip whirl model is presented which is a simplification of an oilwell drillstring confined in a borehole with drilling fluid, and the disappearance of stickslip vibration when whirl vibration appears is explained by bifurcation theory.
Book
Rotating Machinery Vibration: From Analysis to Troubleshooting
TL;DR: The RDA Code for Lateral Rotor Vibration analysis is described in this paper, where the authors present a detailed overview of the RDA Software Insights into Linear LRVs (SLRVs).
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Whirl and whip instabilities in rotor-bearing system considering a nonlinear force model
TL;DR: In this paper, a nonlinear hydrodynamic model is considered for short bearing and laminar flow, and the effects of unbalance, journal bearing parameters and rotor arrangement (vertical or horizontal) on the instability threshold are verified.
Journal ArticleDOI
Stability of whirl and whip in rotor/bearing systems
TL;DR: In this article, it is shown that the rotor self-excited vibrations (known as oil whirl and oil whip) due to fluid dynamic forces generated in the oil-lubricated bearing, can exhibit multiple regimes.
Journal ArticleDOI
Total instability of turbocharger rotors—Physical explanation of the dynamic failure of rotors with full-floating ring bearings
TL;DR: In this paper, the stability of turbocharger rotors with full-floating ring bearings is investigated and a sound physical explanation of the total instability is given, which can be physically explained as synchronization of two limit cycles, namely, synchronization of the inner and outer oil whirl/whip of the floating ring bearings.
References
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Effects of Hydraulic Forces in Annular Pressure Seals on the Vibrations of Centrifugal Pump Rotors
TL;DR: In this article, the effect of squeeze action on the annular clearance spaces of the leakage path of a single mass rotor was analyzed. But the effect on the acceleration of the bearing and journal surfaces was not considered.
Patent
Method of and device for avoiding rotor instability to enhance dynamic power limit of turbines and compressors
TL;DR: A method of and device for avoiding rotor instability and increasing the dynamic power limit of rotary fluid machines such as turbines and compressors which have contact free seals in the gaps between the rotating and nonrotating elements of the machine is presented in this paper.