基于山脊地形台风风场的铁塔风振系数研究

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Abstract In view of the accident that Zhangquan EHV transmission lines are hit by “Moranti” typhoon, analyze the correlation between tower collapse accident and wind field distortion after typhoon passing through the ridge. The actual ridge terrain of the inverted tower is extracted. Take the wind speed of typhoon near the ground meteorological monitoring point as the input wind speed, and calculate wind speed at the tower by Fluent. According to the Shiyuan spectrum, the wind speed time history is simulated and load it on the finite element tower model to get the wind vibration coefficient and the stress ratio of the tower. The results show that the acceleration ratio of wind speed at 10m height on the top of the ridge is about 1.56; the wind vibration coefficient weighted value of the tower top tower increases by 16.1% compared with that of the normal terrain wind field; the largest stress ratio of each member of the tower head is at the bottle mouth, and the largest stress ratio of each member of the tower body is at the tower leg, which is consistent with the actual tower collapse.

Key words： transmission tower typhoon ridge Fluent simulation wind-vibration coefficient

Received: 07 September 2020

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	Articles by authors
	ZHAO Yunlong¹
	WENG Lanxi²
	HUANG Wenchao¹
	HUANG Yanwei¹

Cite this article:

ZHAO Yunlong¹,WENG Lanxi²,HUANG Wenchao¹等. Research on wind-vibration coefficient of iron tower based on typhoon wind field of ridge terrain[J]. Electrical Engineering, 2021, 22(3): 38-43.

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http://dqjs.cesmedia.cn/EN/Y2021/V22/I3/38

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