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结合凉都体育场的建筑造型和周围环境,采用Realizablek-ε湍流模型对屋盖的平均风压进行了数值模拟,得到屋盖的平均风压分布.利用MATLAB编制了线性滤波器的自回归法(AR法)的脉动风速时程模拟程序,模拟了屋盖节点的脉动风速时程;并结合屋盖的平均风压和脉动风速时程数值模拟结果,编制了时域法风振效应分析程序,分析了牛角形屋盖的风致响应规律,得出了屋盖的位移风振系数.研究了屋面荷载、平均风速、结构阻尼比等参数对牛角形屋盖风振系数的影响,得出一定偏差范围内可忽略上述参数取值偏差对牛角形屋盖风振响应影响的结论.
Combined with the architectural modeling and the surrounding environment of Liangdu Stadium, the Realizablek-ε turbulence model was used to simulate the average wind pressure of the roof, and the average wind pressure distribution of the roof was obtained.The autoregressive method of linear filter AR method) is used to simulate the fluctuating wind speed time history of the roof node. Combined with the results of the numerical simulation of the average wind pressure and the fluctuating wind speed time history of the roof, the time-domain wind-induced vibration analysis program is compiled, The wind-induced response law of the horns roof is analyzed and the displacement wind-induced vibration coefficient of the roof is obtained. The influence of roof load, average wind speed and structural damping ratio on the wind-induced vibration coefficient of the horned roof is studied, Within the scope of the above-mentioned parameters can ignore the bias on the impact of horns roof vibration response conclusions.