The Effects of Frequency and Pivot Flexibility on the Dynamic Properties of Tilting-Pad Journal Bearings


Tilting-pad journal bearings (TPJB) dynamic modelling must take into account the frequency dependency of the dynamic parameters, according to tribologists. Blades, impellers, and seals in industrial compressors, turbines, and other rotating devices cause instability, resulting in dominating vibratory frequencies that are often significantly different from rotational frequency. Though the literature has supplied relevant methodologies and numerical data, the design community does not have a complete grasp of the physics of TPJB frequency dependence, and theorists and experimentalists frequently disagree. This study is based on a single-pad, two-degree-of-freedom model that establishes a foundation for comprehending the various geometries and operating circumstances associated with frequency dependence for a complete bearing. The analytical results show that both stiffness and stiffness. The frequency dependency is principally connected with the pad rotational damping and the flexibility of the pivot contact region that provides support for the pad, as shown by and damping coefficients. This research aims to give insight into the role of pivot flexibility in conjunction with fluid film in order to assist analysts in reaching a consensus between theory and experiment.

This article is a revised and enlarged version of a paper delivered at the ASME 2019 Turbo Expo, which took place from June 17 to 21 in Phoenix, Arizona. The work was titled “On the Frequency Dependency of Tilting-Pad Journal Bearings” and has the number GT2019-90195.

Author(S) Details

Laurence F. Wagner
Rotor Bearing Solutions Intl. LLC, 5211 Mountainview Rd., Winston Salem, NC 27104, USA.

Paul E. Allaire
Rotor Bearing Solutions Intl. LLC, 5211 Mountainview Rd., Winston Salem, NC 27104, USA.

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