Bifurcation Characteristics of Unbalanced Rotor - Bearing System

Abstract:

Dynamic model of nonlinear rotor—bearing system is set up using the modified Capone bearing forces models. And the nonlinear dynamics behavior of unbalanced rotor—bearing systems was studied. The system state trajectories, Poincare maps, are also constructed to analyze the typical dynamic behavior of the system．Through the nonlinear dynamic numerical simulation of the system，the dynamic phenomena of the rotor—bearing system caused by oil film forces are clearly distinct. The computational results show that the rotor speed is one of the most important factors of the system dynamic behavior. It presents a periodic, period-doubling motion, quasi-periodic motion, and abundant nonlinear dynamical behavior with the changes of the speed.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 2037-2041
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.2037
• Online since: March 2012
• Authors: Ling Xiang, Zi Rui Wang, Gui Ji Tang
• Keywords: Bifurcation, Nonlinear, Rotor-Bearing System, Unbalanced

References

[1] Yu lie, Liu Heng:A rotor bearing system dynamics.（Jiao Tong University press. Xi'an 2001）

[2] Hu Haiyan:The application of nonlinear dynamics. （Aviation Industry Press. Beijing2000）

[3] Gucken heimer J．Holme P．:Nonlinear oscillations，dynamical systems and bifurcations of vector fields． （Beijing World Publishing Corporation. Beijing）

[4] Adiletta G，Guido A R .Rossi C: Nonlinear dynamics of a grid unbalanced rotor in journal bearing．PartⅡ：Experimental analysis．Nonlinear Dynamics. 1997，14，p.157～189

[5] Sun Baocang, Zhou Chuanrong: r=Research on rotor bearing nonlinear behavior.lubrication and sealing,. 2004, 4，pp.6-7

[6] Adiletta G，Guido A R，Rossi C:Chaotic motions of rigid rotor in short journal bearings．Nonlinear Dynamics. 1996，10(6)，p.251— 269．

DOI: 10.1007/bf00045106

[7] Yang Jinfu, Liu Zhansheng, Yu Daren, Lian Zhonghua．Study on nonlinear oil film force of sliding bearings. Journal of Harbin Institute of Technology, 2003, 35 ( 3)，p.259 – 260

[8] Zhang Wen, Cui Sheng, Xu Xiaofeng, general mathematical model of dynamic load bearing with unsteady nonlinear oil film force, engineering advances in mechanics, Beijing: Peking University Press, 1998: 158 - 167

[9] Xu Xiaofeng, Zhang Wen. Bifurcation and chaos characteristics of an unsteady oil film force of rigid rotor. Journal of vibration engineering, 2000, 13 ( 2) : 247 - 253