Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers
A squeeze film damper (SFD) is a commonly used component in aeroengine support structures. However, eccentric SFDs are often employed in practical applications. Existing research in this field has mainly focused on simple rotor models and frequency-domain solution techniques. In this study, a rotor...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2023/8560275 |
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| _version_ | 1832551076440571904 |
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| author | Jiaqi Han Wei Chen Lulu Liu Guihuo Luo Fei Wang |
| author_facet | Jiaqi Han Wei Chen Lulu Liu Guihuo Luo Fei Wang |
| author_sort | Jiaqi Han |
| collection | DOAJ |
| description | A squeeze film damper (SFD) is a commonly used component in aeroengine support structures. However, eccentric SFDs are often employed in practical applications. Existing research in this field has mainly focused on simple rotor models and frequency-domain solution techniques. In this study, a rotor system tester with and without an eccentric SFD was built, and a simulation model based on the finite element method and fixed interface modal synthesis method was proposed. Then, the nonlinear dynamic response of the rotor system during run-up and run-down was studied based on the tester and simulation model. The results show that an eccentric SFD affords zero frequency and a series of double frequencies in the rotor system response. An eccentric SFD may cause the increase of the critical speed, amplitude jump, and displacement amplitude oscillation of the rotor system during run-up/run-down. Additionally, it may cause the acceleration response at the mounting bracket to significantly increase when the rotor system is suddenly accelerated. |
| format | Article |
| id | doaj-art-c0a9cf9f18164b13920f6eb30c5b66ce |
| institution | Kabale University |
| issn | 1687-5974 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-c0a9cf9f18164b13920f6eb30c5b66ce2025-02-03T06:05:04ZengWileyInternational Journal of Aerospace Engineering1687-59742023-01-01202310.1155/2023/8560275Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film DampersJiaqi Han0Wei Chen1Lulu Liu2Guihuo Luo3Fei Wang4Key Laboratory of Aero-Engine Thermal Environment and StructureKey Laboratory of Aero-Engine Thermal Environment and StructureKey Laboratory of Aero-Engine Thermal Environment and StructureKey Laboratory of Aero-Engine Thermal Environment and StructureSchool of Aircraft EngineeringA squeeze film damper (SFD) is a commonly used component in aeroengine support structures. However, eccentric SFDs are often employed in practical applications. Existing research in this field has mainly focused on simple rotor models and frequency-domain solution techniques. In this study, a rotor system tester with and without an eccentric SFD was built, and a simulation model based on the finite element method and fixed interface modal synthesis method was proposed. Then, the nonlinear dynamic response of the rotor system during run-up and run-down was studied based on the tester and simulation model. The results show that an eccentric SFD affords zero frequency and a series of double frequencies in the rotor system response. An eccentric SFD may cause the increase of the critical speed, amplitude jump, and displacement amplitude oscillation of the rotor system during run-up/run-down. Additionally, it may cause the acceleration response at the mounting bracket to significantly increase when the rotor system is suddenly accelerated.http://dx.doi.org/10.1155/2023/8560275 |
| spellingShingle | Jiaqi Han Wei Chen Lulu Liu Guihuo Luo Fei Wang Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers International Journal of Aerospace Engineering |
| title | Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers |
| title_full | Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers |
| title_fullStr | Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers |
| title_full_unstemmed | Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers |
| title_short | Nonlinear Dynamic Responses of a Rotor-Bearing System with Eccentric Squeeze Film Dampers |
| title_sort | nonlinear dynamic responses of a rotor bearing system with eccentric squeeze film dampers |
| url | http://dx.doi.org/10.1155/2023/8560275 |
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