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为获取低矮房屋屋面局部风压的分布规律,对体型比为1.5∶1∶1的双坡低矮房屋屋面划分若干典型区域并进行数值模拟研究.数值结果与风洞试验结果对比表明:2种研究手段分析结果吻合较好,验证了数值模拟技术在分析低矮房屋表面风压方面的可靠性.基于数值模拟,研究了不同风特性参数对低矮房屋屋面局部区域体型系数分布规律的影响,分析结果表明:来流风向对屋面各区域体型系数的影响是整体性的,且表现出一定规律性;湍流度对屋面各局部区域体型系数的影响不一,对迎风屋面前缘区域影响较大;风速对屋面局部区域体型系数影响较小.本文结论可为我国沿海多发台风地区低矮房屋抗台风设计提供依据.
In order to obtain the distribution of local wind pressure on low-rise houses, some typical areas of low-rise houses with double-slope ratio of 1.5:1:1 were divided and numerically simulated. Numerical results were compared with wind tunnel test results. The results agree well with the experimental data and validate the reliability of the numerical simulation technique in the analysis of wind pressure on the low-rise buildings.According to the numerical simulation, the effect of different wind parameters on the distribution of body coefficient The results show that the influence of incoming wind direction on body shape coefficient of each roof is monolithic and shows certain regularity. The effect of turbulence on the body shape coefficient of local roof is different, which affects the frontal area of windward roof more The wind speed has little effect on the body shape coefficient of the local area.The conclusion of this paper can provide the basis for the anti-typhoon design of the low-rise buildings in the coastal typhoon area.