The Dynamics of Rotor-Bearing Systems With Axial Torque—A Finite Element Approach

[+] Author and Article Information
E. S. Zorzi

Mechanical Technology Inc., Latham, N. Y. 12110

H. D. Nelson

Arizona State University, Tempe, Ariz.

J. Mech. Des 102(1), 158-161 (Jan 01, 1980) (4 pages) doi:10.1115/1.3254707 History: Received June 07, 1979; Online November 17, 2009


This study investigates the effect of constant axial torque on the dynamics of rotorbearing systems using a finite element model. The finite element equation of motion is formulated using the variational approach and the inclusion of axial torques gives rise to an incremental torsional stiffness matrix. This matrix is circulatory since the system is non-conservative. The finite element model is used to determine the static buckling torques and the critical speeds of a uniform shaft for short and long bearings.

Copyright © 1980 by ASME
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