 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13554 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8194
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| In English (Mech. Solids): | | 5360 |
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| Y.Q. Li, W.T. Song, L. Li, W. Li, and B. Li, "Nonlinear Dynamic Behaviors of Bolted Joint Rotor-Casing System Under Multi-Rubbing Fault: Theoretical and Experimental Investigations," Mech. Solids. 60 (7), 6329-6354 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
7 |
Pages |
6329-6354 |
| DOI |
10.1134/S0025654425604008 |
| Title |
Nonlinear Dynamic Behaviors of Bolted Joint Rotor-Casing System Under Multi-Rubbing Fault: Theoretical and Experimental Investigations |
| Author(s) |
Y.Q. Li (School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, PR China)
W.T. Song (School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, PR China)
L. Li (Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou 545006, PR China;School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, PR China, lilei2023@neu.edu.cn)
W. Li (School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, PR China)
B. Li (School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, PR China; Engineering Research Center of Advanced Engineering Equipment, University of Guangxi, Liuzhou 545006, PR China; Engineering Research Center of Advanced Design and Manufacturing Technology of Heavy Vehicle Components, Ministry of Education, Guangxi University of Science and Technology, Liuzhou 545006, PR China) |
| Abstract |
In large gas turbines, rubbing between the rotor and casing is a common failure that can
occur simultaneously at multiple locations. Bolted joints are widely used to fasten adjacent disks
together for ease of maintenance and assembly. The stiffness softening effect caused by the piecewise
linear stiffness characteristics of bolted joint has a significant impact on rotor dynamic properties,
especially in the presence of a rotor-casing rubbing fault occurrence at multi position. In this work, a
dynamic model of a bolted joint rotor-casing system is developed using the lumped mass method,
incorporating the nonlinear stiffness of bolted joints, bearing forces, and fixed-point rubbing at multiple positions. The dynamic properties of the system under different rotor-casing clearances and the
transition points of bending stiffness are examined in detail using bifurcation diagrams,spectrum cascade, etc. The results show that rubbing faults trigger earlier entry into the stiffness-softening area of
the bolted joint and accelerate the softening process. This phenomenon is considered as one of the
main causes of system response instability. These results are validated experimentally on a rotor test rig
equipped with rubbing devices. The investigation results can provide a reference for diagnosing rubbing faults in large turbines with bolted joint structures. |
| Keywords |
dynamic behaviors, bolted joint, bending stiffness, rotor-casing system, multi-point rubbing fault |
| Received |
24 July 2025 | Revised |
26 September 2025 | Accepted |
09 November 2025 |
| Link to Fulltext |
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