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设计加工了1:200缩尺比某超大型冷却塔气弹模型和刚体测压模型,对不同塔距双塔组合、四类典型工程场地单塔风振响应进行气弹模型测振风洞试验,比较了双塔塔距、来流方向角和流场条件对于冷却塔塔筒风振系数的影响;结合东南沿海某工程场地冷却塔群塔及周边建筑物组合形式,采用刚体模型测压试验和气弹模型测振试验比较了复杂场地条件多塔比例系数和风振系数,表明工程场地中与冷却塔同等尺寸其他建筑作为施扰物的重要影响。上述试验结论与我国冷却塔荷载规范进行了详细对比,指出现行规范在适用新建超大型冷却塔工程需要改进的方面。
A 1: 200 scale-ratio air-spring model and a rigid body manometric model of a very large cooling tower were designed and manufactured. The wind-induced vibration test of aeroelastic model was carried out on the single-tower wind-induced responses of four types of typical project venues with different tower pitches and towers. The influences of the distance between two towers, the direction of flow and the flow field conditions on the wind-induced vibration coefficient of the tower were compared. Based on the combination of towers and surrounding buildings in an engineering site of the southeast coast, the rigid body model Compared with the aeroelastic model vibration test, the multi-tower ratio coefficient and wind-induced vibration coefficient of complex site conditions are compared, which shows that the other buildings of the same size as the cooling tower are important influences of the disturbances. The conclusion of the above test is compared with the load specification of cooling tower in our country in detail, and points out that the existing code needs to be improved in the application of the new super-large cooling tower project.