- 摘 要
-
（長安大學(xué)建筑工程學(xué)院， 西安 710061）
［摘要］為改善復(fù)雜體型折疊網(wǎng)殼房屋的抗風(fēng)性能，使其在風(fēng)荷載作用下具有合理外形，基于計算流體動力學(xué)（CFD）的基本理論，運用FLUENT軟件進(jìn)行數(shù)值模擬，與風(fēng)洞試驗數(shù)據(jù)對比驗證，探討與分析輕型折疊網(wǎng)殼房屋的合理數(shù)值風(fēng)洞，包括邊界條件、計算域尺寸、網(wǎng)格劃分方式、離散格式、求解算法、湍流模型等基本參數(shù)和技術(shù)的確定。按照《空間網(wǎng)格結(jié)構(gòu)技術(shù)規(guī)程》（JGJ 7—2010）與野營房屋使用功能要求，以矢跨比、端門傾角、端門高為尺寸參數(shù)，設(shè)計出28種建筑體型，以0°，30°，45°，60°，90°風(fēng)向角為分析參數(shù)進(jìn)行140種工況的數(shù)值模擬，得出輕型折疊網(wǎng)殼房屋不同體型表面風(fēng)壓分布特性與風(fēng)荷載體型系數(shù)。在此基礎(chǔ)上以風(fēng)壓分布最均勻與體型系數(shù)標(biāo)準(zhǔn)差最小為優(yōu)化目標(biāo)，對輕型折疊網(wǎng)殼房屋進(jìn)行基于抗風(fēng)設(shè)計的體型優(yōu)化分析，得到抗風(fēng)性能良好的合理外形。結(jié)果表明，經(jīng)優(yōu)化的外形可有效化解房屋表面的不利風(fēng)壓分布，極大提高折疊網(wǎng)殼的抗風(fēng)性能。
［關(guān)鍵詞］折疊網(wǎng)殼房屋； 計算流體動力學(xué)； 數(shù)值模擬； 風(fēng)荷載體型系數(shù)； 外形優(yōu)化
中圖分類號：TU312文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)11-0128-07
Study on optimization of folded reticulated shell house based on wind-resistant design
Yan Weiheng, Zhang Yujie, Zhang Wen, Ji Minghui, Wang Tuo
(School of Civil Engineering, Chang′an University, Xi′an 710061, China)
Abstract:In order to improve the wind resistance of complex folded reticulated shell house and make it have a reasonable under the action of wind load, numerical simulations were performed using the fluid dynamics calculation software FLUENT based on the basic theory of computational fluid dynamics (CFD). Comparing with wind tunnel test data, reasonable numerical wind tunnel were discussed and analyzed, including boundary conditions, calculation domain size, mesh division, discrete format, solving algorithm, turbulence model and etc. These basic parameters and technology were determined. In accordance with Technical specifications of the spatial grid structure (JGJ 7—2010) and the functional requirements for use in the camping houses, 28 kinds of building optimization schemes were designed with the parameters of the rise span ratio, the angle and height of the end door. Using wind direction angles of 0°, 30°, 45°, 60°, 90° as analysis parameters, the numerical simulations of 140 working conditions were carried out to obtain the wind pressure distribution characteristics and wind load coefficients of light-folded reticulated shell house with different optimization schemes. On this basis, with the objective of the most uniform wind pressure distribution and minimum standard deviation of wind load coefficients, the light-folded reticulated shell house was subjected to an optimization analysis which was based on wind-resistant design, and a reasonable with good wind resistance was obtained. Results show that the optimized can effectively solve the adverse wind pressure distribution on the surface of the house and greatly improve the wind resistance of the folded reticulated shell.
Keywords:folded reticulated shell house; computational fluid dynamics; numerical simulation; wind load coefficient; shape optimization
*總后建筑工程研究所研究基金項目,陜西省自然科學(xué)基金項目（2004E204），中央高?？蒲袑ｍ椯Y金項目創(chuàng)新團(tuán)隊項目（2013G3284016）。
作者簡介：顏衛(wèi)亨,學(xué)士,教授,碩士生導(dǎo)師，Email: yanwh@chd.edu.cn。
