study on galloping oscillation of iced catenary system under cross winds
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ID: 231815
2017
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Abstract
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.
| Reference Key |
chen2017shockstudy
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|---|---|
| Authors | ;Guo Chen;Yiren Yang;Yang Yang;Peng Li |
| Journal | Nano letters |
| Year | 2017 |
| DOI |
10.1155/2017/1634292
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| URL | |
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