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Dynamics analysis of a cracked dual-disk over-hung rotor-bearing system

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Abstract

A dynamic model of a dual-disk vertical over-hung rotor-bearing system is developed, taking into account nonlinear oil-film force. Its dynamic behaviors are investigated by numerical Runge-Kutta method. Its bifurcation and chaos characteristics are analyzed with crack fault and without crack fault. By analyzing the bifurcation plot, Poincare section plots and amplitude spectra, we found that the crack greatly influences the dynamic characteristics of the rotor-bearing system. Because of the strong effect of the nonlinear oil-film force and crack to the system, 1/2 times, 1/3 times frequency components appear in the response spectrum map. The results may bring up theoretical references for fault diagnosis of rotor-bearing systems.

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Authors and Affiliations

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang, 110004, China

    Chen Hong, Wen Bang-chun & Li He

  2. Faculty of Electromechanical Engineering Guandong Univercity of Technology, Guang dong, 510090, China

    Zhang **ao-wei

Authors
  1. Chen Hong
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  2. Wen Bang-chun
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  3. Li He
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  4. Zhang **ao-wei
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Corresponding author

Correspondence to Chen Hong.

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Translated from Journal of Vibration Engineering, 2005, 18(1) (in Chinese)

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Chen, H., Wen, Bc., Li, H. et al. Dynamics analysis of a cracked dual-disk over-hung rotor-bearing system. Front. Mech. Eng. China 1, 204–208 (2006). https://doi.org/10.1007/s11465-006-0002-6

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  • DOI: https://doi.org/10.1007/s11465-006-0002-6

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