Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness
Rod fastened rotor is widely used in gas turbine, aero engine, and other occasions. The bending stiffness of the contact interface directly affects the stable operation of the rotor. Dynamic model of the rod fastened rotor-bearing system has been established considering nonuniform stiffness of inter...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8851996 |
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| _version_ | 1832547728725377024 |
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| author | Jiaqi Li Yao Li Fan Zhang Yinli Feng |
| author_facet | Jiaqi Li Yao Li Fan Zhang Yinli Feng |
| author_sort | Jiaqi Li |
| collection | DOAJ |
| description | Rod fastened rotor is widely used in gas turbine, aero engine, and other occasions. The bending stiffness of the contact interface directly affects the stable operation of the rotor. Dynamic model of the rod fastened rotor-bearing system has been established considering nonuniform stiffness of interface. The motion equation of this system has been deduced from Lagrange’s equations. The linear dynamic characteristics of this rotor has been investigated, such as Campbell diagram, critical speed, and formation, and the nonlinear characteristics of this system, such as chaos and bifurcation, has been investigated too. The result shows that “bistable state” characteristic appeared on the rod fastened rotor system; that is, there are two critical speeds for each order, and they are all positive precession critical speed, and the amplitude response to the lower critical speed is much larger than that its counterparts to the higher critical speed. In terms of nonlinear characteristics, the rod fastened bearing system has experienced periodic 1 motion, multiple periodic motion, quasi-periodic motion, periodic 1 motion, and chaotic motion successively. |
| format | Article |
| id | doaj-art-b351802361744db4bf6a713f33575e19 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-b351802361744db4bf6a713f33575e192025-02-03T06:43:35ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88519968851996Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact StiffnessJiaqi Li0Yao Li1Fan Zhang2Yinli Feng3Key Laboratory of Light Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaKey Laboratory of Light Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaKey Laboratory of Light Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaKey Laboratory of Light Duty Gas Turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, ChinaRod fastened rotor is widely used in gas turbine, aero engine, and other occasions. The bending stiffness of the contact interface directly affects the stable operation of the rotor. Dynamic model of the rod fastened rotor-bearing system has been established considering nonuniform stiffness of interface. The motion equation of this system has been deduced from Lagrange’s equations. The linear dynamic characteristics of this rotor has been investigated, such as Campbell diagram, critical speed, and formation, and the nonlinear characteristics of this system, such as chaos and bifurcation, has been investigated too. The result shows that “bistable state” characteristic appeared on the rod fastened rotor system; that is, there are two critical speeds for each order, and they are all positive precession critical speed, and the amplitude response to the lower critical speed is much larger than that its counterparts to the higher critical speed. In terms of nonlinear characteristics, the rod fastened bearing system has experienced periodic 1 motion, multiple periodic motion, quasi-periodic motion, periodic 1 motion, and chaotic motion successively.http://dx.doi.org/10.1155/2020/8851996 |
| spellingShingle | Jiaqi Li Yao Li Fan Zhang Yinli Feng Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness Shock and Vibration |
| title | Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness |
| title_full | Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness |
| title_fullStr | Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness |
| title_full_unstemmed | Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness |
| title_short | Nonlinear Analysis of Rod Fastened Rotor under Nonuniform Contact Stiffness |
| title_sort | nonlinear analysis of rod fastened rotor under nonuniform contact stiffness |
| url | http://dx.doi.org/10.1155/2020/8851996 |
| work_keys_str_mv | AT jiaqili nonlinearanalysisofrodfastenedrotorundernonuniformcontactstiffness AT yaoli nonlinearanalysisofrodfastenedrotorundernonuniformcontactstiffness AT fanzhang nonlinearanalysisofrodfastenedrotorundernonuniformcontactstiffness AT yinlifeng nonlinearanalysisofrodfastenedrotorundernonuniformcontactstiffness |