Stability Analysis of Nonlinear Stiffness Rotor-Bearing System with Pedestal Looseness Fault

Yuegang Luo; Song He Zhang; Bin Wu; Hong Ying Hu

doi:10.4028/www.scientific.net/AMM.483.285

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 483Stability Analysis of Nonlinear Stiffness...

Stability Analysis of Nonlinear Stiffness Rotor-Bearing System with Pedestal Looseness Fault

Abstract:

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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Periodical:

Applied Mechanics and Materials (Volume 483)

Pages:

285-288

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.483.285

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Online since:

December 2013

Authors:

Yuegang Luo*, Song He Zhang, Bin Wu, Hong Ying Hu

Keywords:

Nonlinear Stiffness, Pedestal Looseness, Rotor-Bearing System, Stability

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