Rotor Response and Sensitivity

Paper No. 33

J. C. Wachel, Vibration Institute, Machinery Vibration & Analysis Meeting, Houston, Texas, April 1983 .

Rotor response calculations are used to define peak response critical speeds and thus are a vital part of purchase specifications. To accurately calculate the range of critical speeds the rotordynamic analyses should consider all the variables that influence rotor response. These include bearing clearance, preload and oil temperatures and other parameters such as unbalance location and amplitude. The sensitivity of rotor response calculations to parametric changes in these variables is discussed in this paper. Procedures that are used to improve correlation between field measured data and rotor response calculations are reviewed and some general conclusions are presented.


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