Wind tunnel tests for wind loads on a tubular transmission tower via multi-balance synchronous force measurement

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (22) : 137-143.

ZHANG Hongjie1，HUANG Yang2，ZHOU Qi2,3

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Abstract

Some results have been achieved about the wind load on the transmission tower under horizontal wind, but there is less study on the wind load on the transmission tower under horizontal wind combined with vertical wind. The aerodynamic force coefficients of the transmission tower body model under the combined action of horizontal wind and vertical wind were obtained by using wind tunnel tests measure multi-balance synchronous force measurement method. The experimental results show that the method can directly and accurately measure the wind load on transmission tower components. Compared to conventional tests, the method can be used to measure the wind load on the transmission tower body model with simultaneous tilt and yaw angles, can accurately simulate the airflow around the transmission tower, and also can reduce or even avoid the boundary layer effect caused by the wind tunnel ground or the separation platform; When the tilt angle of incoming wind is within the range of -5° to 5°, the influence of the vertical wind on the drag coefficient is slight and can be ignored. When the tilt angle of incoming wind is larger than 5°, the vertical wind exerts a significant influence on the aerodynamic coefficients of the transmission tower body, which cannot be neglected.

Key words

tubular transmission tower / multi-balance synchronous force measurement / aerodynamic coefficients / wind yaw angle / wind tilt angle.

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ZHANG Hongjie1，HUANG Yang2，ZHOU Qi2,3. Wind tunnel tests for wind loads on a tubular transmission tower via multi-balance synchronous force measurement[J]. Journal of Vibration and Shock, 2019, 38(22): 137-143

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