The stability of an asymmetric rotor in damped supportsA general-purpose method of evaluating the stability of an asymmetric flexible rotor, mounted in symmetric damped bearings, is defined. This method evaluates the complex eigenvalues of the rotor system by solving the equations of motion in a rotating coordinate frame. The application of this method to a rotor mounted in tilting-pad bearings is demonstrated. The observed behavior of a number of different rotor configurations is compared with corresponding predictions of stability. For the configurations predicted to be unstable, a distinct and unnegotiable threshold of instability is encountered. The sharpness of this threshold is emphasized by careful balancing at speeds fractionally below the threshold. In a final configuration predicted to be marginally stable, lightly damped resonant behavior, negotiable by balancing, is encountered in the region of the first critical speed.
Document ID
19790026795
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smalley, A. J. (Mechanical Technology, Inc. Latham, NY, United States)
Tessarzik, J. M. (Mechanical Technology, Inc. Latham, NY, United States)
Badgley, R. H. (Mechanical Technology, Inc. Latham, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
April 1, 1978
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 78-GT-172
Meeting Information
Meeting: American Society of Mechanical Engineers, Gas Turbine Conference and Products Show