基于Fluent软件平台,采用混合网格进行划分,选用Realizable k-ε湍流模型对某移动通信塔的风场进行三维数值模拟研究,考虑风向角的变化,每隔15°模拟一次,得到通信塔各风向表面平均风压的分布结果:以此为基础,在塔体表面沿高度计算分段风压体型系数,将结果与现行规范进行比较分析并讨论模拟结果的合理性.研究分析表明,数值模拟得到风压系数随风向角的变化而变化,与规范取值吻合且略大于规范取值,为移动通信塔类结构风振计算提供合理的风压体型系数.%A 3D numerical simulation of wind field around a telecommunication tower was conducted on the plateform of Fluent in this paper, with the variation of wind attack angel considered in every 15°. Turbulence model of Realizable k-s was used and the hybrid mesh scheme was adopted. Results of wind pressure distribution of the telecommunication tower in different directions were obtained. Wind pressure coefficients were calculated by dividing the surfaces subjected to wind loads into suitable segments along the height of the tower. The results show that the wind pressure coefficients vary with the wind attack angel. The results in this paper were compared with the values given in our current national wind loading code. It was shown that the results are little bit larger than the values of the code. In this way, reasonable wind pressure coefficients were provided to the wind response calculation of such a structure.
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