A study on the application of limiting streamline on the analysis of non-Gaussian property of the fluctuating wind pressure for roof structures
T. Bitsuamlak2 HU Chao1
1. Architectural Science and Technology Institute, Yangzhou University, Yangzhou 225127, China;
2. Alan G. Davenport Wind Engineering Group, Western Ontario University, London, ON, N6A 5B9, Canada
Abstract:The non-Gaussian fluctuating wind pressure greatly affects the building envelope and some local structural elements, it should be paid attention in the design. Currently, the identification of the non-Gaussian wind pressure field is mainly based on the statistical analysis of the measurement data, but it can not find its application universally. Besides, the method is highly random and the characteristic values in the non-Gaussian area are totally different, so it can not show the non-Gaussian distribution extent in different areas, to overcome it the mechanism of non-Gaussian property should also be considered. Considering that under certain wind field, it is time-averaged stationary for the flow separation and the vortex action sphere, the limiting streamline solved by steady CFD and the basic conclusions of viscous flow separation theory are used here, combined with the experimental results, to analyze the mechanism of formation and distribution of the non-Gaussian properties for typical roof structures. The results show that the distribution pattern of the limiting streamline is highly relevant to the distribution of skewness and kurtosis calculated from the experimental results, which can be reasonably applied on the analysis of the formation and distribution mechanism of the non-Gaussian properties.
孙旭峰1, T. Bitsuamlak2, 胡超1. 屋盖结构脉动风压非高斯特性分析的极限流线方法[J]. 振动与冲击, 2015, 34(8): 157-162.
T. Bitsuamlak2 HU Chao1. A study on the application of limiting streamline on the analysis of non-Gaussian property of the fluctuating wind pressure for roof structures. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(8): 157-162.
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