Stability of submerged oil journal bearings under dynamic load

R. Pai, B. C. Majumdar

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


This paper analyses the stability characteristics of submerged oil journal bearings taking into account the oil film history. A linearized perturbation theory about the equilibrium point can predict the threshold of stability but does not reveal post-whirl orbit detail. For this reason a non-linear analysis of a rigid rotor supported on oil journal bearings under unidirectional constant load, unidirectional periodic load and variable rotating load is carried out. The time-dependent form of the Reynolds equation is solved by a finite difference method with a successive overrelaxation scheme to obtain the hydrodynamic forces. Using these forces, the equations of motion are solved by the fourth-order Runge-Kutta method to predict the transient behaviour of the rotor. Journal centre trajectories are obtained for different operating conditions using a high speed digital computer and graphics.

Original languageEnglish
Pages (from-to)125-135
Number of pages11
Issue number1
Publication statusPublished - 30-05-1991

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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