Failure probability analysis of transmission towers under ice-wind interaction
LI Jiaxiang1,2,3, WANG Wenrui1, FU Xing2, JIANG Wenqiang3, DONG Zhiqian2
1.School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
2.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
3.Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, North China Electric Power University, Baoding 071003, China
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.
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. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(3): 136-146.
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