Time-Varying Behavior of a Statically Indeterminate Shafting System in a Hydrodynamic Journal Bearing

[+] Author and Article Information
Z. H. Karni, M. G. Parsons

Department of Naval Architecture and Marine Engineering, The University of Michigan, Ann Arbor, MI 48109

Z. P. Mourelatos

Fluid Mechanics Department, General Motors Research Labs, Warren, MI 48090

J. Tribol 109(1), 115-123 (Jan 01, 1987) (9 pages) doi:10.1115/1.3261302 History: Received February 21, 1986; Online October 29, 2009


A new direct iterative method for obtaining the time-varying behavior of a statically indeterminate shafting system within one of its hydrodynamic journal bearings is described. A modified Newmark’s method is used to step in time. At each integration time step an optimization technique iterates between the shafting system and the oil film analyses until an equilibrium is achieved. The three-dimensional shafting system structural analysis and the two-dimensional oil film hydrodynamic analysis utilize the finite element method. The “hourglass control” method is employed for the construction of the oil film fluidity matrix. A numerical example illustrates the method.

Copyright © 1987 by ASME
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