Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment
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 c...
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MDPI AG
2021-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/23/11219 |
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| author | Hongxian Zhang Xuejun Li Dalian Yang Lingli Jiang |
| author_facet | Hongxian Zhang Xuejun Li Dalian Yang Lingli Jiang |
| author_sort | Hongxian Zhang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T04:57:12Z |
| format | Article |
| id | doaj.art-6235051ccf34484c9313dbf4c10768b6 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T04:57:12Z |
| publishDate | 2021-11-01 |
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| series | Applied Sciences |
| spelling | doaj.art-6235051ccf34484c9313dbf4c10768b62023-11-23T02:04:29ZengMDPI AGApplied Sciences2076-34172021-11-0111231121910.3390/app112311219Vibration Responses of a Coaxial Dual-Rotor System with Supporting MisalignmentHongxian Zhang0Xuejun Li1Dalian Yang2Lingli Jiang3School of Mechanical Engineering, Liuzhou Institute of Technology, Liuzhou 454006, ChinaSchool of Mechanical & Electrical Engineering, Foshan University, Foshan 528000, ChinaHunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Mechanical & Electrical Engineering, Foshan University, Foshan 528000, ChinaIn 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.https://www.mdpi.com/2076-3417/11/23/11219rotor dynamicsdual-rotor systemmisalignmentbearing loadsspectral analysis |
| spellingShingle | Hongxian Zhang Xuejun Li Dalian Yang Lingli Jiang Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment Applied Sciences rotor dynamics dual-rotor system misalignment bearing loads spectral analysis |
| title | Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment |
| title_full | Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment |
| title_fullStr | Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment |
| title_full_unstemmed | Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment |
| title_short | Vibration Responses of a Coaxial Dual-Rotor System with Supporting Misalignment |
| title_sort | vibration responses of a coaxial dual rotor system with supporting misalignment |
| topic | rotor dynamics dual-rotor system misalignment bearing loads spectral analysis |
| url | https://www.mdpi.com/2076-3417/11/23/11219 |
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