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research-article

Numerical Modeling and Analysis of Flexure-Pivot Tilting-Pad Bearing

[+] Author and Article Information
Junho Suh

Hankyong National University, Korea
junhosuh77@gmail.com

Alan Palazzolo

Texas A&M University
a-palazzolo@tamu.edu

Yeon-Sun Choi

2066, Seobu-Ro, Jangan-Gu Suwon-Si, Gyeong Gi-Do 16419 Republic of Korea
maro2103@naver.com

1Corresponding author.

ASME doi:10.1115/1.4036275 History: Received September 05, 2015; Revised March 03, 2017

Abstract

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 iso-viscosity 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 Reynold’s 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.

Copyright (c) 2017 by ASME
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