Effects of Anomalous Rotor Joints on Turbomachine Dynamics

[+] Author and Article Information
N. Klompas

Gas Turbine Division, General Electric Company, Schenectady, N.Y. 12345

J. Eng. Power 105(4), 927-934 (Oct 01, 1983) (8 pages) doi:10.1115/1.3227502 History: Received December 29, 1982; Online September 28, 2009


Mechanisms simulating rotor joint restoring moments different from the common axisymmetric elastic hinge are derived and their effects on the dynamics of a complete turbomachine are calculated by impressing equivalent perturbing moments. A mechanism for locking subsynchronous whirl to a fractional frequency is described and supporting experimental observations are discussed. Sample analysis shows the possibility of self-sustained synchronous whirl due to preload asymmetry.

Copyright © 1983 by ASME
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