Nonlinear Dynamic Behaviors and Bifurcation of Symmetrical Rotor System Supported by Self-Acting Gas Jounal Bearings

Abstract:

The unbalanced response and corresponding bifurcation behavior of the rotor dynamic system supported by gas journal bearings are investigated. A time-dependent mathematical model is used to describe the pressure distribution of gas journal bearing with nonlinearity. The rigid Jeffcott rotor with self-acting gas journal bearing supports is modeled. The finite difference method and the Successive Over Relaxation (S.O.R.) method are employed to solve the time-dependent Reynolds equation of gas journal bearings. The bifurcation of unbalanced responses of the rotor is analyzed by a Poincaré map. The numerical results reveal periodic, period-doubling, quasi-periodic, and chaotic motion of rich and complex non-linear behaviors of the system.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 2634-2638
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.2634
• Online since: March 2010
• Authors: Wei Min Wang, Yan Jun Lu, Zhi Jun Cao, Yong Fang Zhang, Lie Yu
• Keywords: Bifurcation, Chaos, Gas Journal Bearing, Nonlinear, Rotor

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