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基于VOF方法的雪荷載數(shù)值模擬及工程應(yīng)用
何連華,陳凱,符龍彪
摘 要

[摘要]在FLUENT6.1軟件平臺(tái)上,采用VOF方法對(duì)昌吉體育館的屋面雪荷載進(jìn)行了數(shù)值模擬。VOF方法可以計(jì)算雪相的體積分?jǐn)?shù),從而換算得到雪壓的分布 ,進(jìn)而可以得到屋面積雪分布系數(shù)?;赩OF方法的數(shù)值模擬結(jié)果顯示,屋面的積雪分布形式與實(shí)際暴風(fēng)雪后情況類似,形態(tài)合理;金字塔形屋面的高低屋面處的積雪分布系數(shù)略大于規(guī)范值,折算的整體積雪分布系數(shù)可以方便地應(yīng)用于工程設(shè)計(jì);類似的雪荷載數(shù)值模擬中,對(duì)雪密度的選取應(yīng)該更加重視。暴風(fēng)雪同時(shí)出現(xiàn)時(shí),可能嚴(yán)重危害結(jié)構(gòu)安全,因此,對(duì)大風(fēng)和暴雪的同時(shí)模擬非常有必要。
[關(guān)鍵詞] 雪荷載; 數(shù)值模擬; VOF方法; 暴風(fēng)雪
中圖分類號(hào):TU312.1 文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-848X(2011)11-0141-04
Application and numerical simulation of snow loads based on the VOF method
He Lianhua,Chen Kai,F(xiàn)u Longbiao(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013,China)
Abstract: Based on FLUENT6.1 software platform with the VOF (Volume of Fluid) method, snow load of the roof of Changji Stadium was simulated by Computational Fluid Dynamics method. The volume fraction of the snow can be computed by the VOF method, and the distribution of the snow pressure can be obtained, then, the distribution factor of snow pressure can be specified. Based on the VOF method, the snow distribution  on the roof is similar with the actual situation after snowstorm, the shape is reasonable. The distribution factor of snow pressure at the corner between a higher roof and a lower roof is bigger than the value in the load code. The total distribution factor of snow pressure can be used in the design conveniently. More attentions must be paid to the density of snow in the numerical simulation. Wind storm and snow storm can occur at the same time, and this can do harm to the structures. Therefore, it is very essential to simulate the wind storm and snow storm simultaneously.
Keywords: snow load; numerical simulation; VOF method; snowstorm
作者簡(jiǎn)介:何連華(1981-),男,碩士,工程師,研究方向:風(fēng)工程與荷載,Email:helianhua@163.com。
參考文獻(xiàn)
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