Chaotic and dynamic analysis of a flexible rotor supported by ultra short aero-lubricated bearing system

Jui-Ho Chen^a, Cheng-Chi Wang^b*

^a Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung, Taiwan.

^b Graduate Institute of Precision Manufacturing, National Chin-Yi University of Technology, Taichung, Taiwan. *Corresponding author. E-mail address: wccpipn@yahoo.com.tw

Abstract

This paper analyzed the chaotic behaviors and vibration phenomenon of a flexible rotor with different mass and bearing number supported by ultra short aero-lubricated bearing (USAB) system. The hybrid method combined with differential transformation method and finite difference method are proposed and used to calculate gas pressure distribution of USAB system. The results are shown that system exist chaotic motions over the specific ranges, and the maximum Lyapunov exponent is positive as chaos occurred.

Keywords: Ultra short aero-lubricated bearing; Hybrid method; Chaotic motion.

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Acknowledgements

The financial support of this research was provided by National Science Council of R.O.C., under the projects No. MOST-102-2221-E-167 -035 and MOST-103-2221-E-167 -011 are greatly appreciated.

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