Study on Galloping Oscillation of Iced Catenary System under Cross Winds
This paper mainly aims at revealing the nature of the galloping oscillation of iced catenary system under cross winds. The aerodynamic force on the iced catenary system is assumed to be quasi-steady, and then the quasi-steady aerodynamic lift and drag coefficients are completed in FLUENT. By fitting...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2017/1634292 |
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| author | Guo Chen Yiren Yang Yang Yang Peng Li |
| author_facet | Guo Chen Yiren Yang Yang Yang Peng Li |
| author_sort | Guo Chen |
| collection | DOAJ |
| description | This paper mainly aims at revealing the nature of the galloping oscillation of iced catenary system under cross winds. The aerodynamic force on the iced catenary system is assumed to be quasi-steady, and then the quasi-steady aerodynamic lift and drag coefficients are completed in FLUENT. By fitting the discrete simulation data, the expression of the vertical aerodynamic force is further obtained. According to the Den Hartog vertical galloping mechanism, the stability of iced catenary is discussed and the initial icing angle corresponding to the critical stability is obtained. On this basis, the dynamic model of the simple iced catenary system under cross winds is established. The partial differential vibration equation of the system is converted into the ordinary differential equation by the Galerkin method and then numerically solved. The condition of the unstable catenary motion in simulation is in agreement with that from theoretical stability analysis. In addition, the effects of structural damping, initial icing angle, and wind velocity on the system responses are investigated. |
| format | Article |
| id | doaj-art-65df45c8c92b4b1380348ca4630a9419 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-65df45c8c92b4b1380348ca4630a94192025-02-03T06:12:45ZengWileyShock and Vibration1070-96221875-92032017-01-01201710.1155/2017/16342921634292Study on Galloping Oscillation of Iced Catenary System under Cross WindsGuo Chen0Yiren Yang1Yang Yang2Peng Li3School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSchool of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSchool of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaSchool of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaThis paper mainly aims at revealing the nature of the galloping oscillation of iced catenary system under cross winds. The aerodynamic force on the iced catenary system is assumed to be quasi-steady, and then the quasi-steady aerodynamic lift and drag coefficients are completed in FLUENT. By fitting the discrete simulation data, the expression of the vertical aerodynamic force is further obtained. According to the Den Hartog vertical galloping mechanism, the stability of iced catenary is discussed and the initial icing angle corresponding to the critical stability is obtained. On this basis, the dynamic model of the simple iced catenary system under cross winds is established. The partial differential vibration equation of the system is converted into the ordinary differential equation by the Galerkin method and then numerically solved. The condition of the unstable catenary motion in simulation is in agreement with that from theoretical stability analysis. In addition, the effects of structural damping, initial icing angle, and wind velocity on the system responses are investigated.http://dx.doi.org/10.1155/2017/1634292 |
| spellingShingle | Guo Chen Yiren Yang Yang Yang Peng Li Study on Galloping Oscillation of Iced Catenary System under Cross Winds Shock and Vibration |
| title | Study on Galloping Oscillation of Iced Catenary System under Cross Winds |
| title_full | Study on Galloping Oscillation of Iced Catenary System under Cross Winds |
| title_fullStr | Study on Galloping Oscillation of Iced Catenary System under Cross Winds |
| title_full_unstemmed | Study on Galloping Oscillation of Iced Catenary System under Cross Winds |
| title_short | Study on Galloping Oscillation of Iced Catenary System under Cross Winds |
| title_sort | study on galloping oscillation of iced catenary system under cross winds |
| url | http://dx.doi.org/10.1155/2017/1634292 |
| work_keys_str_mv | AT guochen studyongallopingoscillationoficedcatenarysystemundercrosswinds AT yirenyang studyongallopingoscillationoficedcatenarysystemundercrosswinds AT yangyang studyongallopingoscillationoficedcatenarysystemundercrosswinds AT pengli studyongallopingoscillationoficedcatenarysystemundercrosswinds |