Dynamic Analysis of Tilting-Pad Journal Bearing—Influence of Pad Deformations

[+] Author and Article Information
H. Desbordes, M. Fillon, J. Frene

Université de Poitiers, Laboratoire de Mécanique des Solides, URA CNRS, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France

C. Chan Hew Wai

Electricité De France, Direction des Etudes et Recherches, Département Machines, B.P. 24, 6, Quai Watier, 78401 Chatou Cedex, France

J. Tribol 116(3), 621-627 (Jul 01, 1994) (7 pages) doi:10.1115/1.2928890 History: Received February 05, 1993; Revised October 18, 1993; Online June 05, 2008


A theoretical nonlinear analysis of tilting-pad journal bearings is presented for small and large unbalance loads under isothermal conditions. The radial displacements of internal pad surface due to pressure field are determined by a two-dimensional finite element method in order to define the actual film thickness. The influence of pad deformations on the journal orbit, on the minimum film thickness and on the maximum pressure is studied. The effects of pad displacements are to decrease the minimum film thickness and to increase the maximum pressure. The orbit amplitude is also increased by 20 percent for the large unbalance load compared to the one obtained for rigid pad.

Copyright © 1994 by The American Society of Mechanical Engineers
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