Predictive Maintenance Using the Rotordynamic Model of a Hydraulic Turbine-Generator Rotor

[+] Author and Article Information
Bernhard P. Bettig

Department ot Mechanical & Aerospace Engineering, Arizona State University, Tempe AZ 85287-6106

Ray P. S. Han

Department of Mechanical Engineering, The University of Iowa, Iowa City IA 52242-1527

J. Vib. Acoust 120(2), 441-448 (Apr 01, 1998) (8 pages) doi:10.1115/1.2893849 History: Received September 01, 1995; Revised June 01, 1996; Online February 26, 2008


A use of rotordynamic models in predictive maintenance is described in which variables characterizing the state of a deterioration mechanism are determined from online measurements. These variables are trended to determine the rate of deterioration and to perform a simulation to predict either the machine life or the maintenance period. Some useful terms for using models in predictive maintenance are defined and the prediction procedure is described. The procedure is demonstrated with a simple two degree-of-freedom example and the numerical model of an actual hydraulic turbine-generator rotor. Some benefits and problems associated with the implementation of the procedure are then discussed. It is considered that this procedure brings the possibility of a better understanding of deterioration processes and a resulting better life prediction.

Copyright © 1998 by The American Society of Mechanical Engineers
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