Field Methods for Identification of Bearing Support Parameters: Part I Identification From Transient Rotor Dynamic Response Due to Impacts Conference Paper uri icon


  • A simple procedure, with potential as a field resource, for identification of 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 2,000 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.

name of conference

  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference

published proceedings

  • Volume 4: Turbo Expo 2003

author list (cited authors)

  • De Santiago, O. C., & San Andres, L.

citation count

  • 2

complete list of authors

  • De Santiago, Oscar C||San AndreĀ“s, Luis

publication date

  • January 2003