Although gas-lubricated tilting-pad bearings are widely used in high-speed turbomachinery, the theoretical prediction of the dynamic characteristics of tilting-pad gas bearings is also a very difficult problem because of its structural complexity. Several approaches have been proposed to solve this problem such as the pad assembly method and the small perturbation method. A numerical method by combining the partial derivative method with the equivalent coefficient method is presented in this paper to evaluate the dynamic stiffness and damping coefficients of self-acting tilting-pad gas bearing. The dynamic coefficients with the pads fixed and with the pads perturbation are, respectively, obtained for a typical self-acting tilting-pad gas bearing by using the proposed method to mainly explain the dependency of the bearing dynamic coefficients on the perturbation frequency. For bearings with the pads perturbation, the cross-coupling stiffness and damping coefficients are almost negligible compared with the direct ones. At lower perturbation frequency, the stiffness coefficients increase, while the damping coefficients decrease with an increasing frequency. The higher perturbation frequencies have very little effects on the bearing dynamic coefficients. Dynamic stiffness coefficients approach to the constant and damping coefficients to zero. However, with the pads fixed, in a low range of frequency, the absolute values of cross-coupling stiffness coefficients decrease with frequency. Furthermore, the cross-coupling coefficients are not negligible compared with the direct ones. In addition, the effects of pad inertia on dynamic coefficients are studied and compared with the results of pad inertia neglected.
Skip Nav Destination
e-mail: yulie@mail.xjtu.edu.cn
Article navigation
January 2008
Research Papers
Numerical Analysis on Dynamic Coefficients of Self-Acting Gas-Lubricated Tilting-Pad Journal Bearings
Yang Lihua,
Yang Lihua
Institute of Mechatronics and Information Systems,
Xi’an Jiaotong University
, Xi’an Shaanxi 710049, China
Search for other works by this author on:
Qi Shemiao,
Qi Shemiao
Institute of Mechatronics and Information Systems,
Xi’an Jiaotong University
, Xi’an Shaanxi 710049, China
Search for other works by this author on:
Yu Lie
Yu Lie
Institute of Mechatronics and Information Systems,
e-mail: yulie@mail.xjtu.edu.cn
Xi’an Jiaotong University
, Xi’an Shaanxi 710049, China
Search for other works by this author on:
Yang Lihua
Institute of Mechatronics and Information Systems,
Xi’an Jiaotong University
, Xi’an Shaanxi 710049, China
Qi Shemiao
Institute of Mechatronics and Information Systems,
Xi’an Jiaotong University
, Xi’an Shaanxi 710049, China
Yu Lie
Institute of Mechatronics and Information Systems,
Xi’an Jiaotong University
, Xi’an Shaanxi 710049, Chinae-mail: yulie@mail.xjtu.edu.cn
J. Tribol. Jan 2008, 130(1): 011006 (11 pages)
Published Online: December 17, 2007
Article history
Received:
November 16, 2006
Revised:
August 27, 2007
Published:
December 17, 2007
Citation
Lihua, Y., Shemiao, Q., and Lie, Y. (December 17, 2007). "Numerical Analysis on Dynamic Coefficients of Self-Acting Gas-Lubricated Tilting-Pad Journal Bearings." ASME. J. Tribol. January 2008; 130(1): 011006. https://doi.org/10.1115/1.2805422
Download citation file:
Get Email Alerts
Environmentally Friendly MoS2-hBN Solid Lubricants: A Comprehensive Tribological Evaluation
J. Tribol (April 2025)
Machine Learning in Wear Prediction
J. Tribol (April 2025)
Static Characteristics of Hybrid Water-Lubricated Herringbone Groove Journal Bearing
J. Tribol (April 2025)
Related Articles
Compensation of Cross-Coupling Stiffness and Increase of Direct Damping in Multirecess Journal Bearings Using Active Hybrid Lubrication: Part I—Theory
J. Tribol (January,2004)
Numerical and Experimental Analyses of the Dynamic Characteristics of Journal Bearings With Square Dimples
J. Tribol (January,2018)
Rotordynamic Performance of Flexure Pivot Hydrostatic Gas Bearings for Oil-Free Turbomachinery
J. Eng. Gas Turbines Power (October,2007)
Modeling and Identification of Gas Journal Bearings: Self-Acting Gas Bearing Results
J. Tribol (October,2002)
Related Proceedings Papers
Related Chapters
Summary and Conclusions
Bearing Dynamic Coefficients in Rotordynamics: Computation Methods and Practical Applications
Peridynamics for Numerical Analysis
Advances in Computers and Information in Engineering Research, Volume 2
Introduction
Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow