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RESEARCH PAPERS

Deceleration of an Unbalanced Rotor Through a Critical Speed

[+] Author and Article Information
W. K. Bodger

Keck-Craig Associates, South Pasadena, Calif.

J. Eng. Ind 89(4), 582-585 (Nov 01, 1967) (4 pages) doi:10.1115/1.3610113 History: Received December 01, 1966; Online August 25, 2011

Abstract

The problem of a single-degree-of-freedom rotor decelerating slowly through its critica speed is solved by an energy approach; a closed solution is obtained. A small discontinuous downward jump of rotor speed across the critical speed is shown to be required, either with or without damping in the system. The maximum increment of deflection, hence bending stress, in the rotor shaft is shown to be small, provided the rotor is carefully balanced and/or the system is sufficiently damped.

Copyright © 1967 by ASME
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