四面坡顶轻钢空旷结构表面风压数值模拟

采用基于CFD的数值模拟技术和RNG k-ε湍流模型对一四面坡顶轻钢空旷结构进行了静力风荷载数值模拟,主要考虑了风向角的变化,得到了结构表面的风压分布,并进行了对比分析.该结构表面风压分布不均匀,局部风压较大;风向角对结构表面风压分布具有一定影响.最后,根据分析结果提出了该类结构表面风压的分区方法.

Numerical Simulation of Wind Pressure on Surface of a Hollow Lightweight Steel Structural with Tetrahedral Sloping Top

Numerical simulation of the static wind load on a lightweight steel hollow structure with tetrahedral slope top is done, applying numerical simulation technique based on CFD and RNG turbulence model. The impact of wind direction is mainly considered. Wind pressure distribution on surfaces of the structure is obtained. The result obtained is also compared and analyzed. Wind pressure distribution on the structural surface is non -uniform and local wind pressure is relatively large; the wind direction has certain impact on the wind pressure distribution on the surface of the structure. Finally, based on the analysis result, the partition method for wind pressure on the surface of the this kind of the structure is put forward.