（长安大学建筑工程学院， 西安 710061）

［摘要］为改善复杂体型折叠网壳房屋的抗风性能，使其在风荷载作用下具有合理外形，基于计算流体动力学（CFD）的基本理论，运用FLUENT软件进行数值模拟，与风洞试验数据对比验证，探讨与分析轻型折叠网壳房屋的合理数值风洞，包括边界条件、计算域尺寸、网格划分方式、离散格式、求解算法、湍流模型等基本参数和技术的确定。按照《空间网格结构技术规程》（JGJ 7—2010）与野营房屋使用功能要求，以矢跨比、端门倾角、端门高为尺寸参数，设计出28种建筑体型，以0°，30°，45°，60°，90°风向角为分析参数进行140种工况的数值模拟，得出轻型折叠网壳房屋不同体型表面风压分布特性与风荷载体型系数。在此基础上以风压分布最均匀与体型系数标准差最小为优化目标，对轻型折叠网壳房屋进行基于抗风设计的体型优化分析，得到抗风性能良好的合理外形。结果表明，经优化的外形可有效化解房屋表面的不利风压分布，极大提高折叠网壳的抗风性能。

［关键词］折叠网壳房屋； 计算流体动力学； 数值模拟； 风荷载体型系数； 外形优化

中图分类号：TU312文献标识码：A文章编号：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

*总后建筑工程研究所研究基金项目,陕西省自然科学基金项目（2004E204），中央高校科研专项资金项目创新团队项目（2013G3284016）。

作者简介：颜卫亨,学士,教授,硕士生导师，Email: yanwh@chd.edu.cn。