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对某一具有代表性的大型体育场刚性模型进行了表面测压风洞试验,介绍了试验所采用的主要技术参数和基本的数据处理方法,分析了结构典型测点在不同风向角下的风压变化规律,给出了该体育场屋盖上的对应于50年和100年重现期的10min平均风压值及前10个最小极值风压值。分析表明:风压系数平均值分布规律明显,能体现屋盖上流场分布的情况;均方根值能在一定程度上反映出气流分离和旋涡脱落情况。典型体育场屋盖上表面主要分布负压,其中迎风边缘及突出部位较大,低凹处及尾流区域较小;屋盖下表面在迎风的钝体边缘有较大区域正压出现,背风处分布有不大的均匀负压。
A representative large-scale stadium rigid model was tested by surface pressure wind tunnel test. The main technical parameters and basic data processing methods used in the experiment were introduced. The wind pressure of typical measuring points under different wind direction angles The law of the change of the stadium roof is given and the 10-year mean wind pressure value and the first 10 minimum extreme wind pressure values corresponding to the 50-year and 100-year recurrence periods are given. The analysis shows that the distribution law of average value of wind pressure coefficient is obvious, which can reflect the distribution of flow field on the roof. The root mean square value can reflect the separation of air flow and vortex shedding to a certain extent. Typical stadium roof surface is mainly distributed negative pressure, where the windward edge and prominent parts larger, low depression and wake area is small; the lower surface of the roof in the wind bluff body has a larger area of positive pressure appears at the leeward Distribution is not uniform negative pressure.