摘要
基于Reynolds时均Navier-Stokes方程,采用SST k-ω湍流模型,对台风作用下球面网壳结构屋盖的风荷载进行了数值模拟计算。首先,对文献中球面屋盖算例的风载体型系数进行数值模拟,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,基于此方法计算在不同台风湍流强度与不同矢跨比工况下的球面网壳屋盖风载体型系数分布情况,并分析湍流强度与矢跨比对球面网壳表面风荷载分布的影响。
Based on the Reynolds-averaged Navier-Stokes equations and SST k-~o turbulence model,wind load on roof of spherical shell structure are carried out by numerical simulation under typhoon. Firstly, wind load shape coefficient on spherical roof in reference 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 wind load shape coefficients on roof of spherical shell are carried out by mean of numerical simulation under different turbulence intensities and the rise-span ratios. Meanwhile, the influence of the turbulence intensity and the rise-span ratio on the distribution of wind load is analyzed.
出处
《四川建筑科学研究》
2013年第4期83-86,共4页
Sichuan Building Science
关键词
球面网壳
台风
计算流体力学
湍流强度
风荷载
spherical shell
typhoon
computation fluid dynamics （CFD）
turbulence intensity
wind load
