Wind-induced response and wind load factor of transmission tower under terrain B wind field and typhoon wind field

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (6) : 13-17.

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Wind-induced response and wind load factor of transmission tower under terrain B wind field and typhoon wind field

LOU Wen-juan1, XIA Liang1, JIANG Ying1, JIN Xiao-hua2, WANG Zhen-hua2

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Abstract

A numerical analysis of a four-circuit angle-steel transmission tower under conventional terrain B wind field and typhoon wind field was performed for investigating wind-induced response. A FEM model was established, and the dynamic response was calculated with the fluctuating wind field simulated by harmonic wave superimposing method. Based on data of numerical analysis, wind-induced response under each wind field was discussed. Essential conclusions are as follows: high turbulence and strong variability of typhoon wind field has great influence on transmission towers. RMS of acceleration under typhoon wind field is larger than that under terrain B wind field. Under the two types of wind field, the average ratio of wind load factor is about 1.25.Therefore, the design of transmission towers in typhoon-prone areas should take the fluctuating wind load magnification effect into consideration. Furthermore, an aerolastic model wind tunnel test of the transmission tower was performed to study its wind-induced response under different velocity. The test results were compared with theoretical values and the accuracy of numerical analysis was verified.

Key words

transmission tower / numerical analysis / wind-induced response / wind load factor / typhoon wind field

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LOU Wen-juan;XIA Liang;JIANG Ying;JIN Xiao-hua;WANG Zhen-hua . Wind-induced response and wind load factor of transmission tower under terrain B wind field and typhoon wind field[J]. Journal of Vibration and Shock, 2013, 32(6): 13-17