Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness
This paper presents a finite element model of a rotor system with pedestal looseness stemming from a loosened bolt and analyzes the effects of the looseness parameters on its dynamic characteristics. When the displacement of the pedestal is less than or equal to the looseness clearance, the motion o...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2011-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.3233/SAV-2010-0588 |
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| _version_ | 1832549830292930560 |
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| author | Hui Ma Xueyan Zhao Yunnan Teng Bangchun Wen |
| author_facet | Hui Ma Xueyan Zhao Yunnan Teng Bangchun Wen |
| author_sort | Hui Ma |
| collection | DOAJ |
| description | This paper presents a finite element model of a rotor system with pedestal looseness stemming from a loosened bolt and analyzes the effects of the looseness parameters on its dynamic characteristics. When the displacement of the pedestal is less than or equal to the looseness clearance, the motion of the rotor varies from period-one through period-two and period-three to period-five with the decreasing of stiffness of the non-loosened bolts. The similar bifurcation phenomenon can be also observed during the increasing process of the rotational speed. But the rotor motion is from period-six through period-three to period-four with the decreasing of the foundation stiffness. When the stiffness of the foundation is small and the displacement of pedestal is greater than the looseness clearance, the response of the rotor exhibits period-one and high order harmonic components with the decreasing of looseness clearance, such as 2X, 3X etc. However, when the stiffness of the foundation is great, the spectrum of the response of the rotor will be from combined frequency components to the continuous spectrum with the decreasing of the looseness clearance. |
| format | Article |
| id | doaj-art-eee5f64deda746f1b8952ef4eba1589e |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-eee5f64deda746f1b8952ef4eba1589e2025-02-03T06:08:30ZengWileyShock and Vibration1070-96221875-92032011-01-01181-2132710.3233/SAV-2010-0588Analysis of Dynamic Characteristics for a Rotor System with Pedestal LoosenessHui Ma0Xueyan Zhao1Yunnan Teng2Bangchun Wen3School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, ChinaThis paper presents a finite element model of a rotor system with pedestal looseness stemming from a loosened bolt and analyzes the effects of the looseness parameters on its dynamic characteristics. When the displacement of the pedestal is less than or equal to the looseness clearance, the motion of the rotor varies from period-one through period-two and period-three to period-five with the decreasing of stiffness of the non-loosened bolts. The similar bifurcation phenomenon can be also observed during the increasing process of the rotational speed. But the rotor motion is from period-six through period-three to period-four with the decreasing of the foundation stiffness. When the stiffness of the foundation is small and the displacement of pedestal is greater than the looseness clearance, the response of the rotor exhibits period-one and high order harmonic components with the decreasing of looseness clearance, such as 2X, 3X etc. However, when the stiffness of the foundation is great, the spectrum of the response of the rotor will be from combined frequency components to the continuous spectrum with the decreasing of the looseness clearance.http://dx.doi.org/10.3233/SAV-2010-0588 |
| spellingShingle | Hui Ma Xueyan Zhao Yunnan Teng Bangchun Wen Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness Shock and Vibration |
| title | Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness |
| title_full | Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness |
| title_fullStr | Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness |
| title_full_unstemmed | Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness |
| title_short | Analysis of Dynamic Characteristics for a Rotor System with Pedestal Looseness |
| title_sort | analysis of dynamic characteristics for a rotor system with pedestal looseness |
| url | http://dx.doi.org/10.3233/SAV-2010-0588 |
| work_keys_str_mv | AT huima analysisofdynamiccharacteristicsforarotorsystemwithpedestallooseness AT xueyanzhao analysisofdynamiccharacteristicsforarotorsystemwithpedestallooseness AT yunnanteng analysisofdynamiccharacteristicsforarotorsystemwithpedestallooseness AT bangchunwen analysisofdynamiccharacteristicsforarotorsystemwithpedestallooseness |