There are a variety of abnormal running conditions in rotating machinery that lead to rotor/stator interaction dynamics which, in turn, have a range of effects associated with them. One of these effects is steady vibration response at frequencies which are different from the excitation. This paper describes a mechanism of generating subharmonic vibration frequencies in both numerical simulation and measurements, which are obtained from a study of the relatively new problem of “windmilling imbalance” in aero-engines. What is different from other nonlinear systems with, say, clearance or squeeze film dampers, is the richness of the frequency spectrum.
A Mechanism of Low Subharmonic Response in Rotor/Stator Contact—Measurements and Simulations
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received June 2001; revised January 2002. Associate Editor: M. I. Friswell.
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von Groll , G., and Ewins, D. J. (June 12, 2002). "A Mechanism of Low Subharmonic Response in Rotor/Stator Contact—Measurements and Simulations ." ASME. J. Vib. Acoust. July 2002; 124(3): 350–358. https://doi.org/10.1115/1.1467648
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