输电铁塔在冰风耦合作用下失效概率分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (3) : 136-146.

论文

输电铁塔在冰风耦合作用下失效概率分析

李嘉祥1,2,3，王文瑞1，付兴2，江文强3，董志骞2

作者信息 +

Failure probability analysis of transmission towers under ice-wind interaction

LI Jiaxiang1,2,3, WANG Wenrui1, FU Xing2, JIANG Wenqiang3, DONG Zhiqian2

Author information +

文章历史 +

摘要

覆冰灾害严重威胁输电线路的安全运行。在冰灾过程中，往往伴随着风荷载的作用，为提高输电塔抵御覆冰灾害的能力，本文提出了一种基于Jones覆冰模型的输电铁塔失效概率评估框架。首先以湖南郴州、永州、邵阳三市气象站数据为基础建立了超级站，在此基础上利用Copula函数建立了考虑冰厚-风速、风速-风向相关性的联合概率分布，最后以一条实际输电线路为算例，计算了该线路铁塔在冰风荷载耦合作用下倒塌状态的失效概率。结果表明：本文提出的方法可以有效地评估输电塔在冰风耦合作用下的失效概率，考虑冰厚-风速、风向-风速相关性后，输电塔失效概率的计算更加科学合理。受风向概率的影响，输电塔失效概率的最大值出现的角度并不固定，本文可为输电线路抗冰灾设计提供参考。

Abstract

The icing disaster seriously threatens the safe operation of transmission lines. In the process of ice disaster, it is often accompanied by the effect of wind load. In order to improve the ability of transmission towers to resist icing disaster, this paper proposes a failure probability evaluation framework of transmission towers based on Jones icing model. Firstly, based on the meteorological station data of Chenzhou, Yongzhou and Shaoyang in Hunan Province, the superstation is established. On this basis, the Copula function is used to establish the joint probability distribution considering the correlation of ice thickness-wind speed and wind speed-wind direction. Finally, taking an actual transmission line as an example, the collapse failure probability of the tower under the coupling of ice wind load is calculated. The results show that the method proposed in this paper can effectively evaluate the failure probability of transmission towers under ice-wind coupling. After considering the correlation of ice thickness-wind speed and wind direction-wind speed, The calculation of failure probability of transmission towers is more scientific and reasonable. Affected by the probability of wind direction, the value of transmission towers failure probability may appear at any angle. This paper can provide reference for the design of transmission line ice disaster resistance.

导出引用

李嘉祥1,2,3，王文瑞1，付兴2，江文强3，董志骞2. 输电铁塔在冰风耦合作用下失效概率分析[J]. 振动与冲击, 2024, 43(3): 136-146

LI Jiaxiang1,2,3, WANG Wenrui1, FU Xing2, JIANG Wenqiang3, DONG Zhiqian2. Failure probability analysis of transmission towers under ice-wind interaction[J]. Journal of Vibration and Shock, 2024, 43(3): 136-146

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