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基于流体动力学基本原理和大气边界层基本理论,运用计算流体动力学软件Fluent6.3对野营折叠网壳结构表面风压分布进行数值模拟技术的基础性研究,对比与风洞试验数据,确定复杂体型结构数值模拟时的计算域尺寸、网格划分方式、网格数量、湍流模型等基本参数设定,得到野营折叠网壳在不同风向角下的表面风压分布及其结构体形系数,同风洞试验结果对比,吻和较好。分析表明风速对结构风荷载体形系数影响较小,而风向角对风荷载体形系数的影响较大;所得结构的体形系数,为类似体型结构的抗风设计提供依据。
Based on the basic principles of fluid dynamics and the basic theory of atmospheric boundary layer, the basic research on the numerical simulation technology of wind pressure distribution on camping folded reticulated shell structure is carried out by computational fluid dynamics software Fluent6.3, compared with the wind tunnel test data to determine the complex Body structure numerical simulation of the calculation of the size of the domain, the meshing method, the number of grids, turbulence model and other basic parameters set to obtain the camping folding reticulated shell in different wind angle of the surface wind pressure distribution and its shape coefficient, with the wind Cave test results contrast, kiss and better. The analysis shows that the wind speed has little effect on the shape coefficient of wind load and the wind direction angle has a great influence on the wind load shape coefficient. The shape coefficient of the obtained structure provides the basis for the wind resistance design of the similar body structure.