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Nonlinear dynamic analysis of a rub-impact rotor supported by oil film bearings

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Abstract

A general model of a rub-impact rotor system is set up and supported by oil film journal bearings. The Jacobian matrix of the system response is used to calculate the Floquet multipliers, and the stability of periodic response is determined via the Floquet theory. The nonlinear dynamic characteristics of the system are investigated when the rotating speed and damping ratio is used as control parameter. The analysis methods are inclusive of bifurcation diagrams, Poincaré maps, phase plane portraits, power spectrums, and vibration responses of the rotor center and bearing center. The analysis reveals a complex dynamic behavior comprising periodic, multi-periodic, chaotic, and quasi-periodic response. The modeling results thus obtained by using the proposed method will contribute to understanding and controlling of the nonlinear dynamic behaviors of the rotor-bearing system.

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Authors and Affiliations

  1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China

    Junguo Wang, Dawei Dong, Bin Yan & Chunrong Huang

  2. College of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Jianzhong Zhou

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  1. Junguo Wang
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  2. Jianzhong Zhou
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  3. Dawei Dong
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  4. Bin Yan
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  5. Chunrong Huang
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Correspondence to Junguo Wang.

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Wang, J., Zhou, J., Dong, D. et al. Nonlinear dynamic analysis of a rub-impact rotor supported by oil film bearings. Arch Appl Mech 83, 413–430 (2013). https://doi.org/10.1007/s00419-012-0688-3

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  • DOI: https://doi.org/10.1007/s00419-012-0688-3

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