Numerical Analysis Method and Bifurcation of Gas-Lubricated Journal Bearing-Rotor System with Gyroscopic Effect

Abstract:

Based on the nonlinear theory, the unbalanced responses of the gas-lubricated journal bearing-rotor system are investigated. A time-dependent mathematical model is established to describe the pressure distribution of gas-lubricated journal bearing with nonlinearity. The rigid rotor with gyroscopic effect supported by self-acting gas journal bearing with three axial grooves is modeled. The differential transformation method is employed to solve the time-dependent gas-lubricated Reynolds equation, and the dynamic motion equation is solved by Newmark-β method. The unbalanced responses of the rotor system supported by finite gas-lubricated journal bearings are analyzed by bifurcation diagram, orbit diagram, Poincaré map. The numerical results reveal periodic, period-4 motion of nonlinear behaviors of the system.

• Periodical: Advanced Materials Research (Volumes 230-232)
• Pages: 197-201
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.230-232.197
• Online since: May 2011
• Authors: Yong Fang Zhang, Xiao Lei Shi, Yan Jun Lu, Lie Yu
• Keywords: Bifurcation, Differential Transformation Method, Gas-Lubricated Journal Bearing, Nonlinear

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