某会展中心建筑表面风压分布的数值模拟

基于ANSYS-CFX 13.0软件平台,采用SST湍流模型对某会展中心16个风向角下表面风压场进行了三维数值模拟,并利用自编程序对模拟结果数据进行处理,得到表面分块体型系数.结果表明,附近的干扰建筑物影响了会展中心周围的风场和表面风压,同时数值结果符合钝体绕流规律,可供实际工程采用.分别用简化公式和日本规范建议公式对建筑风振系数进行了估算,建议设计时采用日本规范建议公式计算结果.

Numerical Simulation of Wind Pressure Distribution on Building Surfaces at a Convention Centre

A 3 D numerical simulation of wind field around a convention centre in Zhongshan was conducted with the SST turbulence model on the basis of ANSYS-CFX13.0,and the results of the simulation were analyzed with the program compiled by ourselves.The results show that the wind field and pressure distribution of the surfaces are influenced by the buildings around the convention centre,and the wind pressure distribution and shape coefficients on the building surfaces are in good agreement with the law of flow around a bluff body.The results of the wind vibration factor are got by the simplified method and the Japanese standards,and the Japanese standards are supposed to be used to obtain the results.