| 大型冷却塔的风致振动响应数值分析 |
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| 引用本文： | 武秀根,郑百林,刘曙光,贺鹏飞. 大型冷却塔的风致振动响应数值分析[J]. 力学季刊, 2011, 32(1) |
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| 作者姓名： | 武秀根 郑百林 刘曙光 贺鹏飞 |
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| 作者单位： | 同济大学土木工程学院;同济大学航空航天与力学学院; |
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| 摘 要： | 风荷载是大型冷却塔建筑设计的主要荷载之一,通过风振时域分析可以全面地了解塔身的风振响应特性。本文探讨了采用线性滤波法中的自回归模型(auto-regressive,AR)模拟大型冷却塔风致振动响应的数值方法。首先根据AR模型,基于随机模拟方法,计算冷却塔表面不同高度的随机脉动风压。通过将随机脉动风压和平均风压作为冷却塔表面的外载,采用有限元分析软件计算某冷却塔的风致振动响应。结果表明,基于随机脉动风荷载模拟的数值计算方法,能正确反映冷却塔塔身的风振响应。该方法特别适用于冷却塔高度超出规范要求的情况下,评估冷却塔的风振响应。
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| 关 键 词： | 冷却塔 脉动风压 自回归模型 风致振动 |
Numerical Analysis of Wind Induced Response for Large Cooling Tower |
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| WU Xiu-gen,ZHENG Bai-lin,LIU Shu-guang,HE Peng-fei. Numerical Analysis of Wind Induced Response for Large Cooling Tower[J]. Chinese Quarterly Mechanics, 2011, 32(1) |
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| Authors: | WU Xiu-gen ZHENG Bai-lin LIU Shu-guang HE Peng-fei |
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| Affiliation: | WU Xiu-gen1,ZHENG Bai-lin2,LIU Shu-guang1,HE Peng-fei2(1.College of Civil Engineering,Tongji University,Shanghai,200092,China,2.School of Aerospace Engineering and Applied Mechanics,China) |
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| Abstract: | Wind loading is one of the main loads in the design of large cooling tower.The wind induced dynamic response of tower can be evaluated according to the winds load via time history analysis.The numerical analysis method to simulate the dynamic response of large cooling tower,based on auto-regressive(AR) model belonged to linear filtering method,has been discussed in this paper.The pulsating wind pressure distributed around the surface of tower can be computed by AR model.Then it is acted on the surface of to... |
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| Keywords: | cooling tower pulsating wind pressure auto-regressive model wind induced vibration |
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