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Fractional-order modeling and dynamic analyses of a bending-torsional coupling generator rotor shaft system with multiple faults

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  • Yan, Donglin
  • Wang, Weiyu
  • Chen, Qijuan

Abstract

Unexpected vibrations induced by the crack fault and other unbalance factors in rotor system seriously affect the health and reliability of the generator. Here, to explore the vibration performances, a bending-torsional coupling model of the generator rotor shaft system is established, in which electromagnetic malfunction (unbalanced magnetic pull) and mechanical failures (fractional-order damping, crack and contact-rubbing) are considered. Then, the simulation is done by a modified Adams-Bashforth-Moulton algorithm. Based on the simulation, the correctness of the new coupling model is verified by comparing with previous model and experimental data. At the same time, the new coupling model is analyzed to obtain the dynamic evolutions of the generator rotor shaft system with the changes of crack depth ratio, the fractional order of damping, rotational speed ratio and mass eccentricity of rotor. In addition to this, some critical values and ranges are proposed. Finally, these results can efficiently provide a theoretical reference for the design of generator rotor system and be applied to forecasting and diagnosing vibration faults in generator rotor shaft system.

Suggested Citation

  • Yan, Donglin & Wang, Weiyu & Chen, Qijuan, 2018. "Fractional-order modeling and dynamic analyses of a bending-torsional coupling generator rotor shaft system with multiple faults," Chaos, Solitons & Fractals, Elsevier, vol. 110(C), pages 1-15.
    • Handle: RePEc:eee:chsofr:v:110:y:2018:i:c:p:1-15
    DOI: 10.1016/j.chaos.2018.03.015
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    References listed on IDEAS

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    Cited by:

    1. Zhang, Zhe & Ai, Zhaoyang & Zhang, Jing & Cheng, Fanyong & Liu, Feng & Ding, Can, 2020. "A general stability criterion for multidimensional fractional-order network systems based on whole oscillation principle for small fractional-order operators," Chaos, Solitons & Fractals, Elsevier, vol. 131(C).
    2. Donglin Yan & Weiyu Wang & Qijuan Chen, 2018. "Nonlinear Modeling and Dynamic Analyses of the Hydro–Turbine Governing System in the Load Shedding Transient Regime," Energies, MDPI, vol. 11(5), pages 1-17, May.
    3. Keyun Zhuang & Shehua Huang & Xiangqian Fu & Li Chen, 2022. "Nonlinear Hydraulic Vibration Modeling and Dynamic Analysis of Hydro-Turbine Generator Unit with Multiple Faults," Energies, MDPI, vol. 15(9), pages 1-23, May.
    4. Zhang, Jinjian & Zhang, Leike & Ma, Zhenyue & Wang, Xueni & Wu, Qianqian & Fan, Zhe, 2021. "Coupled bending-torsional vibration analysis for rotor-bearing system with rub-impact of hydraulic generating set under both dynamic and static eccentric electromagnetic excitation," Chaos, Solitons & Fractals, Elsevier, vol. 147(C).
    5. Keyun Zhuang & Chaodan Gao & Ze Li & Donglin Yan & Xiangqian Fu, 2018. "Dynamic Analyses of the Hydro-Turbine Generator Shafting System Considering the Hydraulic Instability," Energies, MDPI, vol. 11(10), pages 1-19, October.
    6. Dutta, Maitreyee & Roy, Binoy Krishna, 2021. "A new memductance-based fractional-order chaotic system and its fixed-time synchronisation," Chaos, Solitons & Fractals, Elsevier, vol. 145(C).
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    8. Yan, Donglin & Wang, Weiyu & Chen, Qijuan, 2020. "Fractional-order modeling and nonlinear dynamic analyses of the rotor-bearing-seal system," Chaos, Solitons & Fractals, Elsevier, vol. 133(C).

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