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| Influence of two discrete methods on galloping characteristics of iced quad bundle conductor |
| Received:April 10, 2020 Revised:August 16, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20200410002 |
| KeyWord:iced quad conductor galloping characteristics discrete method aerodynamic coefficient |
| Author | Institution |
| 闵光云 |
重庆交通大学 土木工程学院, 重庆 |
| 刘小会 |
重庆交通大学 土木工程学院, 重庆 ;重庆交通大学 省部共建山区桥梁及隧道工程国家重点实验室, 重庆 |
| 孙测世 |
重庆交通大学 省部共建山区桥梁及隧道工程国家重点实验室, 重庆 |
| 蔡萌琦 |
成都大学 建筑与土木工程学院, 成都 |
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| Abstract: |
| Based on the Hamilton's principle,the coupled three-degree-of-freedom dynamic equations for an iced conductor are derived,and then two discrete methods are used to discretize the dynamic tension.One is to use Galerkin method directly,and the other is to treat the dynamic tension equivalently among the span length,and then use Galerkin method.Based on a wind tunnel test,the aerodynamics coefficients of the iced quad conductor is obtained,and the aerodynamics of each sub-conductor is equivalent.Then,the aerodynamic coefficients are fitted by Taylor's series,and the angle of attack which is 55° is used to analyze of galloping characteristics of the iced quad conductor.Based on Runge-Kutta method,the displacement response of the two discrete methods are obtained.By comparing the differences of the displacement responses obtained by the two discrete methods,it is found that the two discrete methods have a certain influence on the phase,frequency and amplitude of the system.The research in this paper can be helpful to the improvement of theoretical modeling and can give some guidance to practical engineering. |
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