中文摘要：

基于Reynolds时均N-S方程与SSTk-ω剪切应力输运模型和BSL-RSM雷诺应力模型,对多折面体型悬挑钢桁架屋盖结构的风压分布进行了数值模拟.采用CFX14.0软件,运用有限体积法对控制微分方程进行离散,并采用SIMPLE压力校正算法实现非线性方程的迭代求解,得到了屋盖表面的平均风压系数,并比较了湍流模型、风向角等因素对屋面风压分布的影响,分析了屋面的风压分布规律及结构的流场分布特性,给出了屋盖在最不利风向下的分区平均风压系数,为该类工程的结构抗风设计提供了参考.

英文摘要：

The distribution of wind pressure on the cantilever steel truss roof structure with multi-zigzag plane shape are simulated based on the Reynolds time average Navier-Stokes equation with Shear Stress Transport model and BSL-SM Reynolds stress model. The governing differential equations are discreted by using the finite volume method of CFXI4.0 software and the SIMPLE pressure correction algorithm tO realize iterative solution of nonlinear equations. The average wind pressure coefficient on the surface of the roof is obtained. Compared with the effects of turbulence models, wind direction and other factors on wind pressure distribution of the roof, the rule of the wind pressure distribution on the roof and the flow field characteristics of the structure is analyzed. The average wind pressure coefficient of the partition is given when the roof under the most unfavorable wind direction, so the reference is provided for this kind of engineering structure to the wind-resistant design.