This paper presents a novel finite element elastohydrodynamic lubrication analysis appropriate for gas journal bearings under dynamic conditions. The method employs gas pressure as a state variable, and structural sleeve deformation is represented by a linear combination of pre-selected mode shapes obtained from a related eigenvalue problem. The method takes into account temporal variation of journal position and velocity, and second-order slip flow boundary effects are included at no additional computational cost. The formulation is subsequently applied to a particular example (flexible large-aspect ratio, high-speed, MEMS-scale journal microbearing), where it is shown that a judicious choice of structural sleeve elasticity can significantly improve bearing performance (as measured by pressure distribution and load capacity) when compared with results obtained using rigid bearing surfaces.
Modal and Nodal EHD Analysis for Gas Journal Bearings
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received February 24, 2004; revision received July 26, 2004. Review conducted by: L. Chang.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Boedo, S., and Booker, J. F. (April 7, 2005). "Modal and Nodal EHD Analysis for Gas Journal Bearings ." ASME. J. Tribol. April 2005; 127(2): 306–314. https://doi.org/10.1115/1.1828455
Download citation file:
- Ris (Zotero)
- Reference Manager