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Rub-Impact Investigation of a Single-Rotor System Considering Coating Effect and Coating Hardness

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Abstract

Background

Rub-impact of rotor–stator is one of the major problems for stability and safety of a rotating machine. As a result, the characterization of rub-impact force gradually becomes a crucial factor in the dynamic responses prediction of the rotor system.

Methods

First, the applicable scope of classical rotor–stator rub-impact force models is discussed in this paper. Then, taking a Jeffcott rotor as the research object, rub-impact force models under hard coating, soft coating and general condition are established respectively based on the equivalent linearized method. Finally, dynamic responses of the rotor system are numerically calculated by the linear interpolation method, and the change laws of impact stiffness are further analyzed under different conditions. Then, the effects of the engine coatings on the dynamic characteristics of the rotor system are studied in detail. By means of bifurcation diagram, time histories, whirling orbits, spectrum and impact force diagram, the dynamic variations are revealed.

Conclusions

The results suggest that the dynamic responses of system are closely related to the coating hardness. Meanwhile, the full annular rub and partial rub are affected by the coating hardness to a great extent.

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Availability of data and materials

The data used to support the findings of this study are available from the corresponding author upon request.

Code availability

The data used to support the findings of this study are available from the corresponding author upon request.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant nos. 11702228, 11902315, 11772273).

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Authors and Affiliations

  1. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Yang Yang, Jie Tang & Yiren Yang

  2. National Key Laboratory of Science and Technology on Reactor System Design Technology, Nuclear Power Institute of China, Chengdu, 610213, China

    Guo Chen

  3. School of Astronautics, Harbin Institute of Technology, Harbin, 150001, China

    Dengqing Cao

Authors
  1. Yang Yang
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  2. Jie Tang
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  3. Guo Chen
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  4. Yiren Yang
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  5. Dengqing Cao
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Contributions

YY and GC conceived the theory. JT carried out the simulation. YY wrote the manuscript. YRY and DQC revised the manuscript.

Corresponding author

Correspondence to Jie Tang.

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Yang, Y., Tang, J., Chen, G. et al. Rub-Impact Investigation of a Single-Rotor System Considering Coating Effect and Coating Hardness. J. Vib. Eng. Technol. 9, 491–505 (2021). https://doi.org/10.1007/s42417-020-00243-0

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  • DOI: https://doi.org/10.1007/s42417-020-00243-0

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