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RESEARCH PAPERS: Rotor Dynamics Papers

Finite Journal Bearing With Nonlinear Stiffness and Damping. Part 2: Stability Analysis

[+] Author and Article Information
E. Hashish, T. S. Sankar, M. O. M. Osman

Department of Mechanical Engineering, Concordia University, Montreal, Quebec, Canada

J. Mech. Des 104(2), 406-411 (Apr 01, 1982) (6 pages) doi:10.1115/1.3256358 History: Received June 04, 1981; Online November 17, 2009

Abstract

Stability analysis is performed on the linearized as well as the actual nonlinear finite bearing equations using the improved mathematical models for the hydrodynamic forces that are presented in Part I of this investigation. The results of the analysis using the linear equations show a significant trend, different from previous investigation, with respect to different L/d ratios and therefore can be considered as modified stability curves for the finite bearing. The nonlinear analysis, based on numerical integration of the equation of motion, is carried out for the commonly used L/d = 1. Details on the stability behavior of the finite bearing are established, including the orbital stability regions. It is also found that under certain light loading conditions, the supply pressure can introduce a high possibility of orbital stability to the system.

Copyright © 1982 by ASME
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