Paper Title:
Analysis of Dynamic Stiffness and Damping of Partial Porous Aerostatic Thrust Bearings
  Abstract

Porous materials have been successfully used in an aerostatic bearing. In this paper, the dynamic stiffness and damping of partial porous aerostatic thrust bearings are analyzed by numerical calculation method. Firstly, the pressure distribution function of the bearing is divided into the static and dynamic pressure distribution functions through minor perturbation method. Then, the static and dynamic pressure distribution functions are calculated by FEM. Finally, the dynamic stiffness and damping coefficients of the bearing are solved. The result indicates that the dynamic stiffness increases obviously with the increment of supply pressure and first increases then decreases with the increment of frequency, and that there is negative damping in the low frequency band and the supply pressure has a great impact on the stability of the bearing.

  Info
Periodical
Edited by
Kai Cheng, Yongxian Liu, Xipeng Xu and Hualong Xie
Pages
596-600
DOI
10.4028/www.scientific.net/AMM.16-19.596
Citation
Y. Z. Sun, X. M. Yu, H. T. Liu, Y. C. Liang, "Analysis of Dynamic Stiffness and Damping of Partial Porous Aerostatic Thrust Bearings", Applied Mechanics and Materials, Vols. 16-19, pp. 596-600, 2009
Online since
October 2009
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