Nonlinear Characteristics of Two-Span Rotor-Bearing System with Three-Coupling Faults

Abstract:

The dynamic model of two-span rotor-bearing system with three-coupling faults of rub-impact, crack and pedestal looseness faults was set up, and the influences of faults to nonlinear dynamic characteristics of the system were studied by mapping and continuation comprehensive method. There are many harmonic elements of 1/3, 1/2, 2/3, 1, 3/2 and 2 et al within the sub-critical rotate speed range. But the 3/2 and 2-harmonic elements decrease within the super-critical rotate speed range. It may the main characteristics of the system with three-coupling faults of rub-impact, crack and pedestal looseness. It should notice to diagnosis the three-coupling faults of the system when running within the super-critical rotate speed range.

• Periodical: Applied Mechanics and Materials (Volumes 52-54)
• Pages: 303-307
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.52-54.303
• Online since: March 2011
• Authors: Yuegang Luo, Song He Zhang, Zhao Hui Ren, Bang Chun Wen
• Keywords: Bifurcation, Chaos, Crack, Pedestal Looseness, Rotor-Bearing System, Rub-Impact

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