unfavorable wind

The test conditions and main results of wind tunnel test for Terminal 3 at Beijing Capital Airport are introduced. The block shape coefficients for the most unfavorable conditions are given, which clearly show the characteristics of the wind pressure distributions on this long-span roof surface.

介绍了超大跨度屋盖结构&北京首都机场3号航站楼的模型风洞试验概况和主要结果，给出了屋面在最不利工况下的分块体型系数，清楚地显示了屋面的风压分布特征。

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In the past wind tunnel investigations were the main way to study the aeroelastic problem. When evaluating the aeroelastic stability of a long-span bridge under wind, it is mostly assumed that wind normal to the bridge span is most unfavorable.

以前主要以风洞试验为主要研究手段。在研究风荷载作用下的大跨度桥梁的气动稳定性时，经常假设来风的方向与桥跨正交时是最不利的。

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If wind speed in wind farm can be forecasted accurately, dispatching department can adjust dispatching plan according to the forecasted data ahead of time. So it will lessen the unfavorable influence caused by wind power to the entire electrical network.

如果能对风电场风速进行短期预测，将有利于电力系统调度部门必要时提前调整调度计划，有效的减轻风电对电网的影响。

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A statistics analysis of wind pressure was carried out to reveal the strength and dispersion of the wind force and the unfavorable wind direction was found accordingly.

通过对总受力和压力方差的统计分析，获得了不同风向下结构受风力作用的大小和离散程度，可为评估不利风向角提供重要参考依据。

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For a single chamfered rectangle hanger, the maximum amplitude reached 1 m when the most unfavorable wind approachs along the bridge.

对于切角长方形截面，在单根杆件分析中，顺桥向来风是最不利风向，最大振幅达1m。

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