This paper presents a new approach for modeling flexure-pivot journal bearings (FPJB) employing a three-dimensional (3D) elasto-hydro-dynamic (EHD) lubrication model. The finite element (FE) method is adopted for an analysis of the (1) pad-pivot dynamic behavior and the (2) fluid force. The isoviscosity Reynolds equation is utilized to calculate the fluid force acting on a flexure-pivot pad bearing and spinning journal. Computational efficiency is achieved utilizing modal coordinate transformation for the flexible pad-pivot dynamic analysis. Fluid film thickness plays a critical role in the solution of Reynolds equation and is evaluated on a node-by-node basis accounting for the pad and web deflections. The increased fidelity of the novel modeling approach provides rotating machinery designers with a more effective tool to analyze and predict rotor–bearing dynamic behavior.
Numerical Modeling and Analysis of Flexure-Pivot Tilting-Pad Bearing
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received September 5, 2015; final manuscript received March 3, 2017; published online May 26, 2017. Assoc. Editor: Mihai Arghir.
Suh, J., Palazzolo, A., and Choi, Y. (May 26, 2017). "Numerical Modeling and Analysis of Flexure-Pivot Tilting-Pad Bearing." ASME. J. Tribol. September 2017; 139(5): 051704. https://doi.org/10.1115/1.4036275
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