Linear and nonlinear stability analysis of hydrodynamic journal bearings using mass-conservative cavitation model

Norifumi Miyanaga, Jun Tomioka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The stability of journal bearings is analyzed by the perturbation method, clarifying a treatment of a time derivative term of the lubricant density ratio in the Reynolds-like equation based on the mass-conservative cavitation model. The stability map by the perturbation analysis is verified with the nonlinear transient analysis. In ε<0.1, the stability by the mass-conservative cavitation model was always unstable. In 0.1≦ε, the model gave the higher stability boundary than the non-mass-conservative half-Sommerfeld model. The choice of the cavitation pressure was significant in the bearing stability at lower eccentricity.

Original languageEnglish
Pages (from-to)61-73
Number of pages13
JournalJurnal Tribologi
Volume22
Publication statusPublished - 2019 Sep

Keywords

  • Journal bearings Stability Perturbation analysis Nonlinear orbit analysis Mass-conservative cavitation model Non-mass-conservative half-Sommerfeld model

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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