雷暴冲击风具有同常规的大气边界层风完全不同的风场特征.为研究雷暴冲击风场中建筑物的风荷载,采用大涡模拟(LES)方法对方形截面高层建筑进行了雷暴冲击风场数值模拟,获得了高层建筑在雷暴冲击风作用下的风荷载参数.同时,对雷暴冲击风场进行了数值模拟,所得结果与理论结果吻合良好,验证了方法的可靠性.%Velocity profiles and characteristics in a thunderstorm downburst are significantly different from that of an atmospheric boundary layer wind.Large Eddy Simulation (LES) method is employed to investigate wind loads on high - rise building in a downburst.Drag and pressure coefficients are obtained by numerical simulation.In addition,the wind field of a downburst is studied, and the results are compared with the data obtained from empirical models.
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