摘要
基于Reynolds时均Navier-Stokes方程,采用剪切应力输运(SST)k-ω湍流模型,对球面网壳结构在不同工况下的屋盖风压进行了数值模拟计算。首先,采用数值模拟计算落地球面网壳屋盖体型系数,并与文献风洞试验结果进行对比发现吻合较好,验证了本文计算方法和湍流模型参数选取的合理性。然后,基于数值模拟方法研究不同矢跨比时球面网壳屋盖体型系数分布情况。结果表明:随着矢跨比的增加,屋面顶部风吸力峰值增大,而迎风面与背风面风吸力减小,且逐渐变为正压力。研究结果可为该类屋盖的抗风设计提供参考。
Based on the Reynolds-averaged Navier-Stokes equations and Shear-Stress-Transport （SST） k-ε turbulence model, wind pressure on roof of spherical shell structure are carried out by numerical simulation under different cases. Firstly, shape coefficient on roof of spherical shell was investigated with numerical simulation technique. Compared with wind tunnel data in reference, the computed result is agreed well with the other result, and verifies the applicability of computing method and the selected parameters of turbulence model. Then shape coefficient on roof of spherical shell are analyzed by mean of numerical simulation under different the rise-span ratios. And the obtained results indicated that the peak suction values near the top increase with the increase of the rise-span ratio. The suction of the windward roof and the leeward roof tend to decrease and become positive pressure. The result can be adopted as reference of wind-resistant design of this type of roofs.
出处
《四川建筑科学研究》
2013年第1期47-51,共5页
Sichuan Building Science
基金
邯郸市社会科学重点研究课题(2008035)
邯郸市科技计划项目(1221105084-3)
关键词
球面网壳
雷诺平均方程
计算流体力学
SST
k-ω湍流模型
风压
spherical shell
Reynolds-averaged equations
computation fluid dynamics （CFD）
SST k-to turbulence model
wind pres- sure
