圆柱体建筑物风压系数的数值模拟

The Numerical Simulation of the Wind Pressure Coefficient for Circular Cross-section Structures

利用CFD方法对圆柱体建筑物表面风压进行数值模拟,计算圆柱体建筑物的风压系数和风荷载体型系数,分析湍流模型对体型系数的影响。结果显示,在自适应网格条件下的RNG k-ε湍流模型的模拟结果与《建筑结构荷载规范》中给出的圆柱体建筑物风荷载体型系数能够很好的吻合。

With the help of the commercial soRware FLUENT, The surface wind pressure of circular cross-section structures are numerically simulated and the wind pressure coefficient and wind load shape coefficient can be calculated. Then, the analysis of the relationship between wind load shape coefficient and turbulence model will be made. Comparison between the value given in 〈 Load code for the design of building structures 〉 and the value calculated through CFD simulation can judge the accuracy of wind pressure coefficient. The result indicates that RNG k-ε turbulent model can give a well predication by using solution-adaptive refinement.