Experimental study on the wind pressure characteristics of a UHV converter station roof in different wind fields

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (2) : 146-155.

WANG Zhisong1,2，WANG Yujie1，YU Bo3，XU Qing3，HE Yong3，LI Zhengliang1,2

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Abstract

The damage of the roof of the UHV converter station usually occurs under wind load. In order to reveal the mechanism of wind-induced failure of the roof, this paper studies the wind pressure characteristics on the roof under three wind fields that includes atmospheric-boundary-layer (ABL) wind, wall-jet-flow and homogeneous turbulence flow. Based on wind tunnel test, the influences of mean-wind-speed profile, wind speed, wind direction and turbulence intensity on the wind pressure are compared. The results show that the negative wind pressure on the windward edge of the roof is largest, and the control wind direction is around 45°. In the wall-jet flow, the fluctuating wind pressure and extreme wind pressure is larger than that in the ABL flow. The wind speed has little influence on the mean and extreme value of the negative wind pressure coefficient on the roof, while the turbulence intensity has great influence on the extreme value of the wind pressure coefficient. It is also found from the result of the test that the extreme wind pressure on the roof of the UHV converter station in ABL flow suggested by the "Roof structure wind load standard" (JGJ/T 481-2019) is safe, while the extreme wind pressure in wall-jet flow is the larger than that suggested by JGJ/T 481-2019, which should pay extra attention in the design.

Key words

the UHV converter station roof / atmospheric boundary layer wind / wall-jet flow / homogeneous turbulence flow / extreme wind pressure coefficient

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WANG Zhisong1,2，WANG Yujie1，YU Bo3，XU Qing3，HE Yong3，LI Zhengliang1,2. Experimental study on the wind pressure characteristics of a UHV converter station roof in different wind fields[J]. Journal of Vibration and Shock, 2024, 43(2): 146-155

References

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