Analysis of Dynamic Tilt Stiffness and Damping Coefficients of Externally Pressurized Porous Gas Journal Bearings

[+] Author and Article Information
N. S. Rao

Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India

J. of Lubrication Tech 100(3), 359-363 (Jul 01, 1978) (5 pages) doi:10.1115/1.3453185 History: Received June 30, 1977; Revised April 07, 1978; Online October 20, 2010


A theoretical estimate of dynamic characteristics in terms of stiffness and damping of an externally pressurized gas-lubricated porous journal under tilting mode of vibration is made. The governing nonlinear partial differential equations in the porous medium and in the bearing clearance are linearized using a first-order perturbation analysis. The tilt stiffness and damping are then determined from the solution of the resulting linear partial differential equations numerically. The effect of feeding parameter, supply pressure, porosity parameter, L/D ratio and eccentricity ratio on these two above characteristics is shown.

Copyright © 1978 by ASME
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