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Article

Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment

1
School of Mechanical Engineering, Liuzhou Institute of Technology, Liuzhou 454006, China
2
School of Mechanical & Electrical Engineering, Foshan University, Foshan 528000, China
3
Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, China
*
Author to whom correspondence should be addressed.
Academic Editors: Daniele Zulli and Valeria Settimi
Appl. Sci. 2021, 11(23), 11219; https://doi.org/10.3390/app112311219
Received: 12 September 2021 / Revised: 31 October 2021 / Accepted: 9 November 2021 / Published: 25 November 2021
(This article belongs to the Topic Advances in Dynamics of Building Structures)
In order to improve the thrust-weight ratio, modern aeroengines generally adopt a coaxial dual-rotor system. Factors such as manufacturing errors, assembly errors, bearing wear, and structural deformation can cause misalignment failures in a dual-rotor system. Supporting misalignment is one of the common types of misalignments in a dual-rotor system. To analyze the vibration characteristics of misalignment faults, in this study, we aim to build a finite element model of a dual-rotor system with supporting misalignment. The bearing loads caused by supporting misalignment are calculated using the three-bending moment equation method. Bearing loads are introduced into the dynamic model of the dual-rotor system. The influence of supporting misalignment at different bearings on the dynamic characteristics of the rotor system is investigated based on the supporting misalignment model. Studies have shown that supporting misalignment at different bearings has similar effects on the dynamic characteristics of the dual-rotor system. The proposed supporting misalignment model is more adaptable than the coupling misalignment model. It indicates that the damping of a rolling bearing should be considered in the dynamic analysis of a dual-rotor system although the value of the damping is not large. An experimental analysis is carried out. The simulation results are in good agreement with the experimental results. View Full-Text
Keywords: rotor dynamics; dual-rotor system; misalignment; bearing loads; spectral analysis rotor dynamics; dual-rotor system; misalignment; bearing loads; spectral analysis
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MDPI and ACS Style

Zhang, H.; Li, X.; Yang, D.; Jiang, L. Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment. Appl. Sci. 2021, 11, 11219. https://doi.org/10.3390/app112311219

AMA Style

Zhang H, Li X, Yang D, Jiang L. Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment. Applied Sciences. 2021; 11(23):11219. https://doi.org/10.3390/app112311219

Chicago/Turabian Style

Zhang, Hongxian, Xuejun Li, Dalian Yang, and Lingli Jiang. 2021. "Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment" Applied Sciences 11, no. 23: 11219. https://doi.org/10.3390/app112311219

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