大型冷却塔结构风致稳定和风振效应研究进展
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TU33

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国家自然科学基金资助项目(52008247, 52078383, 52008314);土木工程防灾国家重点实验室自主课题联合资助项目(SLDRCE19-B-11)


Review on Wind⁃Induced Stability and Vibration Effect of Large Cooling Towers
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    摘要:

    伴随我国经济快速发展,火/核电厂大型冷却塔建设保持快速增长势头,呈现超高、超大的发展趋势。风荷载作用下的冷却塔塔筒壳体风致稳定和结构风振效应成为结构设计建造的关键控制因素。笔者从理论分析、试验模拟、数值计算、现场实测4个方面论述了冷却塔风致稳定和风振效应系列研究进展,阐明了基于环向均匀加载的冷却塔稳定验算公式难于适用复杂风压条件下壳体弹性稳定分析与评估,强调了基于现场实测建立超高雷诺数条件下动态绕流物理风洞试验模拟准则的必要性,推荐开展风致动力分析中冷却塔结构阻尼比实测工作。面向台风和龙卷风等特异风灾气候结构效应研究的现实需求,亟需开展特异风场作用下大型冷却塔壳体失稳和结构风振效应和机理的研究。

    Abstract:

    With the rapid development of China's economy, the construction number of cooling tower in thermal/nuclear power plants in China keeps a rapid increase and the cooling tower structure tends to be ultra-high and super-large. The wind-induced shell stability and vibration effect have become key factors in the structural design and construction of cooling towers. A series of research progresses on wind-induced stability and wind-induced vibration effect of cooling towers are reviewed in this paper from the four aspects, including theoretical analysis, experimental simulation, numerical calculation and field measurement. It is demonstrated that the shell stability checking formulas based on uniformly-distributed circumferential wind loads are not suitable for the shell stability investigations of large cooling towers under the complex wind pressures. The necessity to establish the simulation criterion of dynamic flow at ultra-high Reynolds number adopted in the physical wind tunnel test based on the field measurements is emphasized. The field measurement of structural damping ratio values of cooling towers during the wind-induced dynamic analysis is suggested. In the future, it is urgent to carry out the studies on the shell instability performance and the mechanism of structural wind-induced effects under the actions of non-synoptic winds such as strong typhoons and tornadoes to meet the increasing design and construction demands of large cooling towers.

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  • 在线发布日期: 2022-05-06
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