大跨屋盖风压场的本征正交分解与重构适应性研究.docx

大跨屋盖风压场的本征正交分解与重构适应性研究.docx大跨屋盖风压场的本征正交分解与重构适应性研究摘要:对3类典型屋盖(封闭式方形平屋盖、封闭式曲面屋盖和开合式曲面屋盖)进行了刚性模型风洞测压试验,,:斜风向封闭式平屋盖的POD分解性能最优,开合式曲面屋盖次之,,45°风向角下封闭式平屋盖的第2阶POD模态可以较好地反映锥形涡分量,,对于相同测点,模态数越多,,测点脉动风压系数越大,:风洞;封闭式平屋盖;封闭式曲面屋盖;开合式曲面屋盖;本征正交分解中图分类号::positionandReconstructionofWindFieldforLarge-spanRoofs?お?LIShou-ke,LIShou-ying???k,CHENZheng-qing,HUANGTao(WindEngineeringResearchCenter,HunanUniv,Changsha,Hunan410082,China)Abstract:Windtunneltestswerecarriedouttomeasurethewindpressureontheclosedflatroof,,,retractableroofissecond,andclosedcurvedroofistheworst;:windtunnels;closedflatroof;closedcurvedroof;retractableroof;position(POD)大跨空间屋盖由于其形状各异,周围流场的分离、再附以及漩涡脱落等诸多因素导致其表面风压分布非常复杂,一般情况下,