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分别在A类地貌和B类地貌中测得某核电常规岛厂房的刚性模型表面风压风洞试验数据。用频域方法计算了厂房屋盖风致动力响应。计算结果显示结构动态位移响应在不同地貌中差别较小。且正面迎风时结构风致动态位移均方根响应比斜向迎风时要小。分析了不同风向角下结构表面风压谱密度的分布,结构正面迎风时,结构表面风压谱密度函数能量主要分布在低频段;当风沿斜向作用时,结构表面风压谱密度函数能量主要分布在高频段。风压谱密度函数谱峰对应的折算频率与结构振型对应的自振折算频率一致时,结构风致动力响应将会增大。
The wind tunnel test data of the rigid model surface of a conventional island plant of a certain nuclear power station were measured respectively in the type A landforms and the type B landforms. The wind-induced dynamic response of plant roof is calculated by using the frequency domain method. The calculated results show that the structural dynamic displacement response has little difference in different landforms. And the windward dynamic wind pressure response of the windward structure is smaller than that of the windward windward direction. The distribution of wind pressure spectral density at different wind direction angles is analyzed. When the wind front is windy, the energy distribution of wind pressure spectral density function is mainly distributed in the low frequency band. When the wind acts diagonally, the surface energy density function energy Mainly in the high frequency band. When the conversion frequency corresponding to the peak of the wind pressure spectral density function is the same as the corresponding natural vibration frequency of the structural mode, the wind-induced dynamic response will increase.