Wind Loading on Cooling Towers
Wind Loading on Cooling Towers
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发表时间：
1980-03
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通讯作者：
J. Armitt
中科院分区：
文献类型：
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作者：
J. Armitt
本文提出了一种用于冷却塔壳体风致应力评估的风洞技术。它包括大气风的模拟和受测塔的气动弹性模型，作为完整现场模型的一部分。结果表明，模型的稳态和脉动风荷载及动力特性的模拟结果与实测结果吻合较好。结果表明，该方法对塔壳破坏风速的预测结果与实测数据吻合较好。冷却塔壳内的应力对复杂塔群气动相互作用引起的风荷载分布变化非常敏感。如果壳体的共振频率足够低，由建筑物和其他冷却塔的尾迹产生的湍流产生的振动可以对应力产生重大贡献。
A wind-tunnel technique for the assessment of wind induced stresses in cooling tower shells has been developed. It includes simulation of the atmospheric wind and aeroelastic models of the towers under test as part of a complete site model. It is shown that the simulation of the steady and fluctuating wind loadings and the dynamic properties of the models are in good agreement with results from full-scale towers. The predictions of wind speeds for failure of the tower shell given by the method are shown to be in good agreement with full-scale evidence. Stresses in cooling tower shells are sensitive to changes in wind loading distribution arising from aerodynamic interactions in complex groups of towers. If the resonant frequencies of the shell are low enough, vibration arising from turbulence produced by the wakes of buildings and other cooling towers can produce significant contributions to the stresses.