Stability Analysis of Nonlinear Stiffness Rotor-Bearing System with Pedestal Looseness Fault
2013 ◽
Vol 483
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pp. 285-288
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Set Up
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The dynamic model of nonlinear stiffness rotor-bearing system with pedestal looseness fault was set up, taking the linearity and cube item as the physics nonlinear factors. The periodic solution of system was analyzed by continuation-shooting algorithm for periodic solution of nonlinear non-autonomous system, and the stability of system periodic motion and unsteady law are discussed by Floquet theory. The unstable form of it is Hopf bifurcation. In the region of critical rotate speed, the main motion of the system is periodic-4; and it of ultra critical rotate speed, the main motion of the system is periodic-3 and chaotic motion. The conclusions provide theoretic basis reference for the fault diagnosis of the rotor-bearing system.
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2010 ◽
Vol 17
(5-7)
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pp. 761-770
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2009 ◽
Vol 626-627
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pp. 517-522
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2001 ◽
Vol 79
(8)
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pp. 801-809
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2013 ◽
Vol 332
(25)
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pp. 6768-6784
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