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针对某大跨度结构,进行动态测压风洞试验和风荷载数值模拟研究。通过风洞试验,给出了该大跨度体育馆屋面及四周立面表面的风压系数,并分析了风压分布的特征,为该工程的主体和围护结构抗风设计提供详细的风荷载数据。通过数值模拟研究,探讨复杂体型建筑表面平均风压CFD数值模拟的可行性,提出了应用于复杂工程CFD数值模拟时的网格划分方法,有效地减少了多个风向角时的建模工作量。计算结果表明,体育馆表面的风压与风洞试验结果基本一致;在局部区域存在较大误差。最后比较了网格密度、湍流模型对数值计算精度的影响。CFD数值模拟简洁、高效,能获得丰富的数据成果,可以用于复杂工程的平均风荷载研究。
For a large span structure, dynamic pressure measurement wind tunnel test and wind load numerical simulation study. Through the wind tunnel test, the wind pressure coefficient of the roof and the surrounding facade of the large-span gymnasium is given, and the characteristics of the wind pressure distribution are analyzed. Detailed wind load data are provided for the wind-resistance design of the main body and the envelope of the project . Through the numerical simulation study, the feasibility of CFD numerical simulation of the average wind pressure on the surface of complex body building is discussed. The meshing method applied in CFD numerical simulation of complex engineering is put forward, which effectively reduces the modeling workload when multiple wind direction angles . The calculation results show that the wind pressure on the surface of the gymnasium is basically the same as the wind tunnel test results, and there is a big error in the local area. Finally, the influence of grid density and turbulence model on numerical calculation accuracy is compared. The CFD numerical simulation is concise and efficient, and can obtain rich data results, which can be used to study the average wind load of complex engineering.