Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Analysis of Air Foil Bearing using Influence Coefficients of a Bump Foil

포일변형 영향계수를 이용한 공기포일베어링 해석

  • 김영철 (한국기계연구원 e-엔지니어링연구센터) ;
  • 이동현 (한국과학기술원 기계공학과) ;
  • 김경웅 (한국과학기술원 기계공학과)
  • Published : 2006.02.01
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Abstract

This paper presents the influence coefficient method to predict the deflection of bump foil precisely in the sub-structure of AFB(air foil bearing). Heshmat has introduced the simple compliance model to calculate the deflection of bump foil. But this approach can not consider the deflection of bump foil at the edge of AFB, so elasto-hydrodynamic model is insufficient to analyze in case that the eccentricity ratio is greater than 1. Peng has used the average pressure and film thickness, but this approach is not also a realistic model. Influence coefficients of a bump is calculated by finite element method, and introduced in bump deflection equations of the performance analysis of air foil bearing. The effects of the influence coefficient on the bearing performance is discussed in detail for appropriate foil design.

Keywords

References

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  1. 회전체 동역학 및 Tribo 요소의 연구동향 vol.10, pp.1, 2007, https://doi.org/10.5293/kfma.2007.10.1.101