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RESEARCH PAPERS

A Finite Element Approach to Pad Flexibility Effects in Tilt Pad Journal Bearings: Part I—Single Pad Analysis

[+] Author and Article Information
L. L. Earles, A. B. Palazzolo

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843

R. W. Armentrout

CentriMark Division of Imo Industries Inc., Friendswood, TX 77546

J. Tribol 112(2), 169-176 (Apr 01, 1990) (8 pages) doi:10.1115/1.2920238 History: Received March 28, 1989; Online June 05, 2008

Abstract

A general method of incorporating pad flexibility effects into tilting pad isothermal bearing analysis is developed. The pad assembly approach is extended using 2-dimensional finite elements to determine pad deformations of a single pad. The pad deformations are represented by a single degree of freedom, the change in the pad radius of curvature, thus the current method is an approximate approach. The equations to calculate frequency reduced coefficients for a single pad are presented. Synchronously reduced coefficients for a single pad are in agreement with previous curved beam approximate methods and a more rigorous iterative approach. The finite element pad model provides more versatility in modeling nonuniform pad dimensions and the skewed boundary conditions which occur at the spherical pivot-pad socket interfaces.

Copyright © 1990 by The American Society of Mechanical Engineers
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