| 三圆柱绕流的实验研究 |
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| 引用本文： | 陈翰林, 赵林, 张栋, 刘鑫, 任翔, 葛耀君. 冷却塔群塔风致干扰脉动风压频谱特性与相关性[J]. 工程力学, 2021, 38(10): 44-53. DOI: 10.6052/j.issn.1000-4750.2020.09.0683 |
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| 作者姓名： | 陈翰林 赵林 张栋 刘鑫 任翔 葛耀君 |
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| 作者单位： | 1.同济大学土木工程防灾国家重点实验室，上海 200092;2.中南安全环境技术研究院股份有限公司，武汉 430070;3.同济大学桥梁结构抗风技术交通运输行业重点实验室，上海 200092;4.中国电力工程顾问集团中南电力设计院有限公司，武汉 430071;5.深圳中广核工程设计有限公司，深圳 518100 |
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| 基金项目： | 国家重点研发计划项目(2018YFC0809600，2018YFC0809604)；国家自然科学基金项目(51678451) |
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| 摘 要： | 冷却塔群塔干扰效应研究通常面向塔筒等效静风荷载，缺少群塔组合对于脉动风压干扰特性的研究。该文选取矩形布置的八塔组合为研究对象，对群塔进行刚性模型同步测压风洞试验。基于不同风向角条件塔筒表面的脉动风压时程，研究了测点之间的脉动风压相关性，分析了关键测点风压频谱与环向整体合力频谱的相关性，比较了环向整体阻力(顺风向合力)与升力(横风向合力)的功率谱受扰特性，并基于试验数据给出了关键点风压以及合力的功率谱拟合表达式。频谱分析结果表明：干扰会增大结构敏感区域内的升力功率谱密度取值，由此引起的动力放大效应亟需关注。该文关于脉动风压干扰的研究策略和结论可为类似群体建/构筑物组合气动干扰效应分析提供借鉴思路。
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| 关 键 词： | 冷却塔 群塔组合 脉动风压 相关性 频谱特性 |
| 收稿时间： | 2020-09-23 |
| 修稿时间： | 2021-06-21 |
Influence of adjacent buildings on wind effects on cooling towers |
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| CHEN Han-lin, ZHAO Lin, ZHANG Dong, LIU Xin, REN Xiang, GE Yao-jun. TIME-FREQUENCY CHARACTERISTICS AND RELEVANCE OF FLUCTUATING WIND PRESSURE OF GROUPED COOLING TOWERS[J]. Engineering Mechanics, 2021, 38(10): 44-53. DOI: 10.6052/j.issn.1000-4750.2020.09.0683 |
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| Authors: | CHEN Han-lin ZHAO Lin ZHANG Dong LIU Xin REN Xiang GE Yao-jun |
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| Affiliation: | 1.State Key Lab of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;2.Central-Southern Safety& Environment Technology Institute Co., Ltd, Wuhan 430070, China;3.Key Laboratory of Transport Industry of Wind Resistant Technology for Bridge Structures, Tongji University, Shanghai 200092, China;4.Central Southern China Electric Power Design Institute Co., Ltd of China Power Engineering Consulting Group, Wuhan 430071, China;5.China Nuclear Power Engineering Co., Ltd, Shenzhen 518100, China |
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| Abstract: | The traditional research of grouped-towers interference effect usually emphasizes the equivalent static wind loading of the tower tubes, lacking research on the interference characteristics of the group tower arrangement to the fluctuating wind pressure. A rectangular arrangement of eight towers with various aerodynamic interference characteristics was selected as the research object. The wind tunnel test of rigid tower synchronous pressure measurement was carried out on the grouped towers. Based on the time history of fluctuating wind pressure on the tower surface with different wind direction angles, the correlation between fluctuating wind pressure at different measuring points is studied, the correlation between wind pressure spectrum at key measuring points and the spectrum of circumferential overall resultant force is analyzed, and the power spectrum disturbance characteristics of circumferential overall resistance (along wind resultant force) and lift (across wind resultant force) are compared. Based on the test data, the fitting expression of power spectrum of the wind pressure and the resultant force at key points are developed. The results of spectrum analysis indicate that interference will increase the lift power spectral density in the sensitive area of the structure, and that the interference caused a certain degree of dynamic amplification effect needs an attention. The research strategies and conclusions of this paper on fluctuating wind pressure interference can provide a reference for the analysis of aerodynamic effects of similar grouped buildings/structures. |
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| Keywords: | cooling towers group arrangement fluctuating wind pressure correlation spectrum characteristics |
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