【摘要】 介绍了复杂大跨屋面的脉动风压风洞试验研究方法和广州国际会议展览中心屋面脉动风压风洞试验的结果,并对结果进行了分析。分析表明:风压系数平均值分布规律性明显,能体现屋面流场分布情况;均方根值则在一定程度上反映出气流分离和旋涡脱落情况。复杂大跨屋面上表面主要分布为负压,迎风边缘及突出部位较大,低凹处及尾流区域较小;下表面风压分布具有钝体外形的特点,内压的大小与开门状态有关。更多还原

【Abstract】 The fluctuating pressure on the large-span complex roof of Guangzhou International Meeting and Exhibition Center were investigated by means of wind tunnel test, The test results have been analyzed. The analysis showed that the distribution of average wind pressure coefficient is disciplinary and it can reveal the distribution of the roof’s fluid field ; The RMS wind pressure coefficient can reveal the situation of airflow’s separation and vortex shedding a certain extent. The up-surface of this kind of large roof is mainly loaded by suction, the suction of windward edges and convex parts is comparatively bigger, contrarily that of the other areas is smaller; The characteristics of fluctuating pressure distribution for the down-surface of large roof is similar to the bluff bodies’, The inner pressure is related to the doors’ state.更多还原