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（1 湖南大學(xué)土木工程學(xué)院， 長(zhǎng)沙 410082； 2 香港城市大學(xué)建筑學(xué)與土木工程學(xué)系， 香港 999077; 3 長(zhǎng)沙理工大學(xué)土木與建筑學(xué)院， 長(zhǎng)沙 410082)

［摘要］以珠海華發(fā)藝術(shù)館為工程背景，通過(guò)在數(shù)值模擬平臺(tái)上建立數(shù)值風(fēng)洞模型，對(duì)工程中的復(fù)雜樹(shù)狀結(jié)構(gòu)進(jìn)行CFD數(shù)值模擬研究。數(shù)值模擬中基于RANS湍流模型，著重對(duì)各樹(shù)狀結(jié)構(gòu)樹(shù)冠部分的風(fēng)壓分布情況及藝術(shù)館內(nèi)行人高度處風(fēng)環(huán)境情況進(jìn)行研究，并將其中兩個(gè)典型樹(shù)狀結(jié)構(gòu)樹(shù)冠部分的表面風(fēng)壓分布情況的模擬結(jié)果與風(fēng)洞試驗(yàn)進(jìn)行了對(duì)比，研究結(jié)果表明：數(shù)值模擬計(jì)算方法能夠較為準(zhǔn)確地預(yù)測(cè)復(fù)雜樹(shù)狀結(jié)構(gòu)平均風(fēng)壓分布情況及藝術(shù)館館內(nèi)的流場(chǎng)信息；各樹(shù)樹(shù)冠部分的風(fēng)壓分布情況受附近樹(shù)狀結(jié)構(gòu)以及藝術(shù)館的干擾較大，這點(diǎn)對(duì)樹(shù)頂標(biāo)高較大的樹(shù)狀結(jié)構(gòu)體現(xiàn)得尤為明顯；結(jié)合珠海市多年氣象資料，藝術(shù)館整體風(fēng)環(huán)境情況較好，僅在部分區(qū)域由于狹管效應(yīng)出現(xiàn)了風(fēng)速比較大的情況。

［關(guān)鍵詞］樹(shù)狀結(jié)構(gòu)； 數(shù)值模擬； 風(fēng)洞試驗(yàn)； 風(fēng)壓分布； 建筑風(fēng)環(huán)境

中圖分類號(hào)：TU973+-32文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)06-0087-05

Numerical simulation study on complex tree-shaped structures based computational fluid dynamics method

Wu Ying1, Li Qiusheng1,2, Chen Fubin3

(1 College of Civil Engineering， Hunan University, Changsha 410082，  China; 2 Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong 999077, China; 3 College of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410082, China)

Abstract:Based on the engineering background of Huafa Art Museum in Zhuhai, the complex tree-shaped structures in the museum were numerically simulated by the means of computational fluid dynamics method (CFD) through constructing appropriate numerical wind tunnel model on numerical platform. By using  turbulence model(RANS)  in the simulation, the wind pressure distributions on the tree crown of each tree-shaped structure and wind environment conditions on the pedestrian level in the main building of the museum were emphatically discussed, and a comparison about the wind pressure distribution on the tree crown of two typical tree-shaped structures was made between numerical predictions and wind tunnel test results. The results  indicate that numerical simulation method can accurately predict the wind pressure distribution on complex tree-shaped structures as well as the flow field information in the museum; the wind pressure distribution on each tree crown is mostly interfered by neighboring tree structures and the museum, which is particularly evident on the higher tree-shaped structures; combining with the meteorological data in Zhuhai, the general wind environment of the museum is considered to be favorable except that the wind speed ratio in some regions is comparatively bigger because of the channeling effect. 

Keywords:tree-shaped structure; numerical simulation; wind tunnel test; wind pressure distribution; building wind environment

*國(guó)家自然科學(xué)基金項(xiàng)目（51408062，51478405）,湖南省創(chuàng)新平臺(tái)與人才計(jì)劃項(xiàng)目（2015RS4050）,中國(guó)博士后基金（2015M572238）。

作者簡(jiǎn)介：吳穎，碩士，工程師，Email：wuyingengineer@126.com。