 | | 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: | | 13205 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8140
|
| In English (Mech. Solids): | | 5065 |
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| Y.Q. Li, X.L. Cai, and C.M. Wen, "Numerical and Experimental Investigations on the Dynamic Behaviors of a Bolted Joint Dual-Rotor System with Inner Raceway Defect of Inter-Shaft Bearing," Mech. Solids. 60 (2), 1012-1032 (2025) |
| Year |
2025 |
Volume |
60 |
Number |
2 |
Pages |
1012-1032 |
| DOI |
10.1134/S0025654424606864 |
| Title |
Numerical and Experimental Investigations on the Dynamic Behaviors of a Bolted Joint Dual-Rotor System with Inner Raceway Defect of Inter-Shaft Bearing |
| Author(s) |
Y.Q. Li (School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006 China;Guangxi Earthmoving Machinery Collaborative Innovation Center, Guangxi University of Science and Technology, Liuzhou, 545006 China, liyuqi61148@126.com)
X.L. Cai (School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006 China)
C.M. Wen (School of Electronic Engineering, Guangxi University of Science and Technology, Liuzhou, 545006 China, cmwen@gxust.edu.cn) |
| Abstract |
The bolted joint dual-rotor system, connecting the high- and low-pressure rotors through
an inter-shaft bearing, is extensively used in large-scale gas turbines due to its ease of assembly and
high efficiency. Cracking failure in the inter-shaft bearing is a common form of malfunction that significantly impacts the engine’s safety and stable performance. This paper models a bolted joint dual-rotor system, taking into account the inner raceway defect of the inter-shaft bearing and the bolted
joint’s time-varying bending stiffness. The aim is to provide a better understanding of the vibration and
bending stiffness features of the bolted joint dual-rotor system. Through the numerical integration, the
vibration waveforms, spectra, bending stiffness, and inter-shaft bearing forces with and without inner
raceway defect are obtained and simulated. It is found that the presence of an inner raceway defect in
the inter-shaft bearing results in new resonant peaks and causing additional frequency components.
Moreover, the defect-induced impulse vibrations can induce a softened state in the bolted joint, generating continuous frequencies in the vibration spectra, especially at higher speeds. A test rig for the
bolted joint dual-rotor setup, featuring an inter-shaft bearing with an inner raceway defect, is established to acquire vibration signals from the rotor. The experimental results provide the verification for
the numerical simulation results. The analysis may prove reference for the simulation and bearing fault diagnosis of a bolted joint dual-rotor system. |
| Keywords |
Impulse vibration, bolted joint, dual-rotor system, inner raceway defect, inter-shaft bearing |
| Received |
04 December 2024 | Revised |
11 February 2025 | Accepted |
16 February 2025 |
| Link to Fulltext |
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