Dynamic Behaviour Analysis of Rotor System Supported on Squeeze Film Dampers
Lv Xiaogang(1),Zhao Yucheng(2),Lu Ji(3)
(1 Shaan xi Science and Technology school，723000, Hanzhong, China)
(2 College of Science of China University of Mining & Technology，221116, Xuzhou, China)
(3 School of Aerospace of Xi’an Jiaotong University，710049, Xi'an, China)

Abstract: The dynamic property of fluid film bearing-rotor system supported on a squeeze film damper are investigated with a nonlinear model. Runge Kutta method and the Poincaré mapping method are adopted to evaluate the response and bifurcation in the system of squeeze film damper-sliding bearing-soften rotor. It is shown from the calculational results that the system remains stable within a certain range of rotating speed or quasi-period, bifurcation and chaos appear with the changed rotating speed, which provides reference for engineering design of SFD-sliding bearing rotor system.
Keywords: sliding bearing, soften rotor; squeeze film damper, dynamic property.