Analysis of Dynamic Coefficients for Multirecess Hydrostatic Journal Bearings with Journal Rotation by Finite Element Method

  • Y. Tian
  • M. Bonis
Conference paper


Hydrostatic journal bearings are extensively used as supports of spindle in high precision machine tools because of their high rigidity and stable rotational accuracy. It is of great importance to predict the dynamic behaviour of hybrid journal bearings subjected to an external force with a given excitation frequency, because the presence of cross-coupling terms can have a significant effect on the dynamic response and stability of hydrostatic spindles, especially, owing to the fact that if the cross-coupling stiffness is different from zero, the hybrid journal bearing is not always stable. An analysis of dynamic characteristics of a capillary-compensated four-recesses hybrid journal bearing, taking into account compressibility of the lubricant in the bearing recesses and lubricant inertia in the bearing capillary resistor, is presented.


Excitation Frequency Journal Bearing Reynolds Equation Dynamic Coefficient Hydrostatic Spindle 
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  1. 1.
    Ghosh M.K. and Viswanath N.S., Recess Volume Fluid Compressibility Effect on the Dynamic Characteristics of Multirecess Hydrostatic Journal Bearings with Journal Rotation. Journal of Tribology, vol.109, N°2, July 1987, PP. 417-426.Google Scholar
  2. 2.
    Lund J.W., Review of the concept of Dynamic Coefficients for Fluid Film Journal Bearings. Journal of Tribology, paper ASME n° 86-Tri-48, pp. 1-5.Google Scholar

Copyright information

© Springer-Verlag Berlin, Heidelberg 1991

Authors and Affiliations

  • Y. Tian
    • 1
  • M. Bonis
    • 1
  1. 1.Division systèmes mécaniques, Département de Génie MécaniqueUniversité de Technologie de CompiègneCompiègne cédexFrance

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