交错布局折叠网壳帐篷群的风致干扰效应研究  

Research on wind-induced interference effect of staggered arrangement folding reticulated shell tents

作　　者：颜卫亨[1] 高思 吴东红[3] 何立勇 YAN Wei-heng;GAO Si;WU Dong-hong;HE Li-yong(School of Civil Engineering, Chang＇an University, Xi ＇ an 710061, China;The Fourth Audit Center of Central Military Commission Audit Office, Beijing 100009, China;School of Sciences, Chang＇an University, Xi＇an 710061, China)

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]第四直属审计中心,北京100009 [3]长安大学理学院,陕西西安710061

出　　处：《空间结构》2018年第2期48-56,40,共10页Spatial Structures

基　　金：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)

摘　　要：为研究交错布局折叠网壳帐篷群的风致干扰效应,基于流体动力学和大气边界层基本理论,运用FLUENT软件并借助单体帐篷的风洞试验,探讨与分析湍流模型、离散格式和求解算法等关键技术及参数,建立交错布局帐篷群的数值风洞.以两列交错和三列交错布局下的5个风向角、3种横向疏密系数和4种纵向疏密系数为参数,对96种工况帐篷群中目标帐篷进行表面风压分布特性数值模拟研究,得到不计干扰效应的帐篷群间临界间距,以及目标帐篷各分区的干扰因子.在此基础上,对比分析3种规则布局和交错布局中各帐篷表面的风压分布特性,得到干扰因子变号的区域及适用于群体帐篷的风荷载体型系数.在所选5个风向角下,交错布局折叠网壳帐篷群的风致干扰效应不可忽略,90°风向为最不利风向角.所得结果可为折叠网壳帐篷群体的设计、规划布局及使用提供理论依据.To investigate the wind-induced interference effect of staggered arrangement folding camping tent groups,a research was conducted by using the software FLUENT and the wind tunnel tests on single tent.Based on the fluid dynamic theory and the atmospheric boundary layer theory,some key parameters were analyzed,including the turbulent flow model,the discrete form and the solution algorithm,and the numerical wind tunnel was established accordingly.Regarding wind direction angle,lateral density coefficient and vertical density coefficient as variable parameters,96 working conditions were simulated respectively,including 5 kinds of wind direction angles under two columns staggered arrangement and three columns staggered arrangement,3 kinds of lateral density coefficients and 4 kinds of vertical density coefficients.The critical distance of tent groups without considering the interference effect was obtained,as well as the interference factor on partitions of the target tent.Based on this,the wind pressure distribution characteristics on tents of regulation arrangement and staggered arrangement were analyzed comparatively.The sign-changing region of interference factor and the shape coefficient of wind loadsuitable for tent groups were obtained.With the five selected wind angles,the research indicates that the wind interference effect of staggered layout folding reticulated shell tents can not be ignored and 90°is the worst wind direction,which should be paid more attention in designing,planning and using.

关 键 词：折叠网壳帐篷群 数值模拟 交错布局 干扰因子 风荷载体型系数 放大效应 

分 类 号：TU312.1[建筑科学—结构工程]