Dynamical Analysis of Rub-impact Rotor System with Asymmetric Oil Film Force  

作　　者：CONG Rui GAO Guang-fu LIU Shu-lin YU Hai-jun 

机构地区：[1]College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, P.R. China [2]School of Meehatronics Engineering and Automaton, Shanghai University, Shanghai 200072, P.R. China [3]Downhole Operation Branch, Daqing Oilfield Corp. Ltd, Daqing 163318, P.R. China

出　　处：《International Journal of Plant Engineering and Management》2010年第3期181-187,共7页国际设备工程与管理（英文版）

摘　　要：Considering the effect of non-symmetry film force, nonlinear stiffness and nonlinear friction force, a dynamical model of rub-impact rotor system is established, then the nonlinear dynamical behavior is studied by numerical analysis method. The effect of rotation speed, nonlinear stiffitess ratio and speed effect factor on brifurcation and chaotic behavior for rub-impact rotor system is comprehensively analyzed. The analysis results show that the effect of non-symmetry film force, nonlinear stiffness and nonlinear friction force on the dynamical behavior of the rotor system has close relation with rotation speed. The chaotic behavior exists in a wider parameter region, and the chaotic evolution rule is more complicated. The research provides a reliable theory basis and reference for diagnosing some faults of the rotor system.Considering the effect of non-symmetry film force, nonlinear stiffness and nonlinear friction force, a dynamical model of rub-impact rotor system is established, then the nonlinear dynamical behavior is studied by numerical analysis method. The effect of rotation speed, nonlinear stiffitess ratio and speed effect factor on brifurcation and chaotic behavior for rub-impact rotor system is comprehensively analyzed. The analysis results show that the effect of non-symmetry film force, nonlinear stiffness and nonlinear friction force on the dynamical behavior of the rotor system has close relation with rotation speed. The chaotic behavior exists in a wider parameter region, and the chaotic evolution rule is more complicated. The research provides a reliable theory basis and reference for diagnosing some faults of the rotor system.

关 键 词：rub-impact rotor non-symmetry film force nonlinear stiffness nonlinear friction force chaotic behavior brifurcation 

分 类 号：O322[理学—一般力学与力学基础] V27[理学—力学]