Bisynchronous Torsional Vibrations in Rotating Shafts

[+] Author and Article Information
O. Bernasconi

Swiss Federal Institute of Technology, Lausanne, Switzerland CH-1015

J. Appl. Mech 54(4), 893-897 (Dec 01, 1987) (5 pages) doi:10.1115/1.3173135 History: Received December 11, 1986; Revised May 04, 1987; Online July 21, 2009


In this study, the intrinsic behavior of rotating shafts with residual unbalance is considered. The longitudinal component of the angular momentum caused by synchronous precession (whirling) induces torsional vibrations with a frequency of twice the rotation frequency (bisynchronous). The nonlinear term which represents this coupling is characteristic of the asymmetrical aspect of rotating shaft kinematics. This result has been obtained analytically and confirmed experimentally.

Copyright © 1987 by ASME
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