异形大跨指廊屋盖脉动风压非高斯特性研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (21) : 1-10.

论文

异形大跨指廊屋盖脉动风压非高斯特性研究

汪之松1，2 ，姚彬彬2，方智远3，李正良1，2，涂熙1，2

作者信息 +

Non-Gaussian characteristics of fluctuating wind pressure on irregular large-span roof

WANG Zhisong1,2, YAO Binbin2,FANG Zhiyuan3, LI Zhengliang1,2, TU Xi1,2

Author information +

文章历史 +

摘要

基于刚性模型测压风洞试验，研究异形大跨屋盖的平均风压分布及脉动风压非高斯特征，分别采用高阶统计量法和柯尔莫哥洛夫-斯米尔诺夫(Kolmogorov-Smirnov，K-S)检验法对脉动风压的非高斯特性进行判别并划分其分布区域，最后通过五种概率分布模型对非高斯脉动风压的概率分布进行拟合。结果表明：屋盖表面平均风压以负压分布为主，且负压极值多出现于屋脊或屋面转角的气流分离区；异形大跨屋盖脉动风压的非高斯特性显著，非高斯脉动风压主要出现在屋面迎风前缘、指廊背风侧和屋面转角处，相较于高阶统计量法，K-S检验法的划分结果集中度更好，规律性更强；通过相关系数和均方根误差评价拟合效果，五种概率分布模型中的Weibull模型对非高斯脉动风压概率分布的拟合效果最佳。

Abstract

Based on the wind tunnel pressure test of the rigid model of the irregular large-span roof， the distribution of average wind pressure and non-Gaussian characteristics of the roof surface pulsating wind pressure were studied. High-order Statistical Moment Method and Kolmogorov-Smirnov (K-S) Method were used to discriminate the non-Gaussian pulsating wind pressure and divide its distribution area. Then five probability distribution models were used to fit the probability distribution of non-Gaussian pulsating wind pressure. The results show that the average wind pressure on the roof surface is generally negative， and the extreme value of negative pressure mostly occurs in the airflow separation area of the roof ridge or roof corner. The results of non-Gaussian pulsating wind pressure division area indicate: the non-Gaussian pulsating wind pressure of irregular large-span roof is obvious， and the non-Gaussian pulsating wind pressure mainly occurs in the windward eave， the leeward side of the corridor and the roof corner. However，the results of the K-S Method are more centralized and more regular compared with High-order Statistical Moment Method. The fitting performance is evaluated by Correlation coefficient and Root Mean Square Error. Among the five probability distribution models， the Weibull model has the best fitting effect on the probability distribution of non-Gaussian pulsating wind pressure.

导出引用

汪之松1，2,姚彬彬2，方智远3，李正良1，2，涂熙1，2. 异形大跨指廊屋盖脉动风压非高斯特性研究[J]. 振动与冲击, 2023, 42(21): 1-10

WANG Zhisong1,2, YAO Binbin2,FANG Zhiyuan3, LI Zhengliang1,2, TU Xi1,2. Non-Gaussian characteristics of fluctuating wind pressure on irregular large-span roof[J]. Journal of Vibration and Shock, 2023, 42(21): 1-10

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