A simple procedure, with the potential as a field resource, for identification of a bearing support parameter from recorded transient rotor responses due to impact loads follows. The method is applied to a test rotor supported on a pair of mechanically complex bearing supports, each comprising a tilting pad bearing in series with an integral squeeze film damper. Identification of frequency dependent bearing force coefficients is good at a rotor speed of 2000 rpm. Stiffness coefficients are best identified in the low frequency range (below 25 Hz) while damping coefficients are best identified in the vicinity of the first natural frequency (48 Hz) of the rotor bearing system. The procedure shows that using multiple-impact frequency averaged rotor responses reduces the variability in the identified parameters. The identification of frequency-dependent force coefficients at a constant rotor speed is useful to assess rotor-bearing system stability.
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January 2007
Technical Papers
Field Methods for Identification of Bearng Support Parameters—Part I: Identification From Transient Rotor Dynamic Response due to Impacts
Luis San Andrés
Luis San Andrés
Mast-Childs Tribology Professor
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Oscar C. De Santiago
Luis San Andrés
Mast-Childs Tribology Professor
J. Eng. Gas Turbines Power. Jan 2007, 129(1): 205-212 (8 pages)
Published Online: March 1, 2003
Article history
Received:
October 1, 2002
Revised:
March 1, 2003
Connected Content
A companion article has been published:
Field Methods for Identification of Bearing Support Parameters—Part II: Identification From Rotor Dynamic Response due to Imbalances
Citation
De Santiago, O. C., and Andrés, L. S. (March 1, 2003). "Field Methods for Identification of Bearng Support Parameters—Part I: Identification From Transient Rotor Dynamic Response due to Impacts." ASME. J. Eng. Gas Turbines Power. January 2007; 129(1): 205–212. https://doi.org/10.1115/1.2227033
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