[提要]通过对宝安体育馆进行风洞试验，对体育馆悬挑屋盖的平均风压和脉动风压分布以及总升力进行了分析讨论，并进一步对体育馆屋盖的测点脉动风压功率谱进行了分析。屋盖悬臂梁的迎风面和背风面的测点脉动风压功率谱表现出显著的差异，迎风面测点的脉动风压功率谱曲线在较低的频率出现驼峰，而背风面测点的脉动风压功率谱曲线在较高的频率出现驼峰。测点脉动风压功率谱曲线上出现的驼峰可能与测点所在区域的漩涡的脱落有关。有关结论对进一步开展大跨屋盖的研究提供了+定的参考依据。

[关键词] 大跨悬挑屋盖 平均风压 脉动风压 功率谱密度

Abstract:Surface pressure distribution on a flat gymnasium roof is discussed. Mean pressure and fluctuating pressure coefficients on the roof were measured by wind tunnel experiment. Meanwhile, maximum and minimum peak pressure coefficients on the roof were determinedly. Furthermore, the power spectra of fluctuating wind pressures on the roof were also analyzed. The results show that the spectra of windward pressure taps are significantly different with those of leeward pressure taps. Humps on spectra are observed at lower frequency at windward taps, while those are observed at higher frequency at leeward taps. These humps may be related with the vortex shedding at those regions.