Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Friction Effects on the Performance of Air Foil Bearings

공기포일베어링의 성능에 미치는 범프마찰효과

  • 김영철 (한국기계연구원 e-엔지니어링연구센터) ;
  • 이동현 (한국과학기술원 기계공학과 대학원) ;
  • 김경웅 (한국과학기술원 기계공학과)
  • Published : 2005.12.01
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Abstract

This paper presents the theoretical model and analysis results to investigate the effect of Coulomb damping in the sub-structure of a foil bearing. Vertical and horizontal deflection of a bump is restricted by friction of the bump. Equivalent viscous damping of the bump foil is derived from the Coulomb friction. Dynamic equation of the bump is constituted by stiffness and damping terms. The air film is modeled by the compressible Reynolds equation. A perturbation approach and finite difference numerical method is used to determine the static and dynamic performance of the bearing from the coupled fluid-structural model. The analysis result shows that the static and dynamic performance is enhanced by the bump friction.

Keywords

References

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