Non-linear stability analysis of a rigid rotor on tilting pad journal bearings

This paper describes a method for conducting non-linear stability analysis on the synchronous motion of the journal axis and tilting pads in a system consisting of a symmetrical rigid rotor mounted on tilting pad journal bearings with two pads. The method makes it possible to obtain the limit curves...

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Bibliographic Details
Published in:Tribology international 1996-11, Vol.29 (7), p.571-578
Main Authors: Brancati, Renato, Rocca, Ernesto, Russo, Riccardo
Format: Article
Language:English
Subjects:
Applied sciences
Bearings, bushings, rolling bearings
Drives
Exact sciences and technology
lubrication
Mechanical engineering. Machine design
non-linear behaviour
stability
tilting-pad journal bearing
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Summary:This paper describes a method for conducting non-linear stability analysis on the synchronous motion of the journal axis and tilting pads in a system consisting of a symmetrical rigid rotor mounted on tilting pad journal bearings with two pads. The method makes it possible to obtain the limit curves separating the stable operating condition, characterized by the above motion, from the so-called unstable one characterized by motions of the pads and journal with a fundamental frequency equal to one half the rotor angular speed. A variational method is used to carry out stability analysis on the synchronous solution of the non-linear equations of motion, obtained in an approximated analytical form using a particularized harmonic balance method.
ISSN:0301-679X
1879-2464
DOI:10.1016/0301-679X(96)00003-5