Dynamics analysis of a cracked dual-disk over-hung rotor-bearing system |
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Authors: | Chen Hong Wen Bang-chun Li He and Zhang Xiao-wei |
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Affiliation: | (1) School of Mechanical Engineering & Automation, Northeastern University, Shenyang, 110004, China;(2) Faculty of Electromechanical Engineering Guandong Univercity of Technology, Guang dong, 510090, China |
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Abstract: | A dynamic model of a dual-disk vertical over-hung rotor-bearing system is developed, taking into account nonlinear oil-film
force. Its dynamic behaviors are investigated by numerical Runge-Kutta method. Its bifurcation and chaos characteristics are
analyzed with crack fault and without crack fault. By analyzing the bifurcation plot, Poincare section plots and amplitude
spectra, we found that the crack greatly influences the dynamic characteristics of the rotor-bearing system. Because of the
strong effect of the nonlinear oil-film force and crack to the system, 1/2 times, 1/3 times frequency components appear in
the response spectrum map. The results may bring up theoretical references for fault diagnosis of rotor-bearing systems.
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Translated from Journal of Vibration Engineering, 2005, 18(1) (in Chinese) |
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Keywords: | nonlinear vibration rotor-bearing system crack nonlinear oil-film force over-hung rotor |
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