M型抗风降温塑料大棚风效应与对比分析  

Comparative Analysis and Wind Effect of M-type Plastic Shed with Wind Resistant and Cooling

作　　者：徐雨晴 吕鑫 王少杰[1,3] 贾聪 魏珉 刘浩林[1] Xu Yuqing;Lv Xin;Wang Shaojie;Jia Cong;Wei Min;Liu Haolin(Shandong Agricultural University College of Water Conservancy and Civil Engineering,Tai’an 271018,China;Shandong Agricultural University College of Horticulture Science and Engineering,Tai’an 271018,China;Scientific Observation and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region,Ministry of Agriculture and Rural Affairs,Tai’an 271018,China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]山东农业大学园艺科学与工程学院,山东泰安271018 [3]农业农村部黄淮海设施农业工程科学观测实验站,山东泰安271018

出　　处：《农机化研究》2023年第6期10-18,共9页Journal of Agricultural Mechanization Research

基　　金：国家大宗蔬菜产业技术体系项目(CARS-23-C04);国家重点研发计划政府间国际科技创新合作重点专项(2017YFE0195300);中国博士后科学基金面上项目(2017M622239)。

摘　　要：为提高塑料大棚的抗风降温性能,优化提出了M型大棚。采用计算流体动力学(CFD)方法,围绕M型大棚、大跨度拱棚、双连栋拱棚,分别开展了不同风向角下的整体风压特性分析,并通过对棚身分区计算得到了风荷载体型系数和极值风压。研究结果表明:M型大棚在各风向角下的整体风压系数均小于大跨度拱棚和双连栋拱棚;随着风向角增大,各区域风荷载体型系数大致呈减小趋势,斜风向下出现局部高负压区域;M型大棚、大跨度拱棚、双连栋拱棚的风荷载体型系数最大值分别出现在30°、0°、0°风向角下,对应数值分别为-0.73、-1.28和-1.16,3种棚体的极值风压分别为0.296、0.518和0.470kPa。基于研究成果建造的M型大棚经受住了多次台风的考验,通过真实工程验证了M型大棚优越的抗风性能,为其推广应用提供了参考依据。In order to improve the wind resistance and cooling performance of plastic greenhouses,M-type shed was optimized.Computational fluid dynamics(CFD)method was used to analyze the overall wind pressure characteristics of M-type shed,large span arch shed and two-span shed under different wind directions.In addition,the shape coefficient and extreme wind pressure of wind load were obtained through the partition calculation of shed body.The results show that:the overall wind pressure coefficient of M-type shed is less than that of large span arch shed and two-span shed at each wind direction angle.With the increase of wind direction angle,the wind load shape coefficient in each area shows a decreasing trend,and the local high negative pressure area appears in the downwind;the maximum shape coefficient of wind load of M-type shed,large span arch shed and two-span appears at 30°,0°,0°wind direction angle,the corresponding values are-0.73,-1.28 and-1.16 respectively,and the extreme wind pressure of the three kinds of greenhouses are 0.296 kPa,0.518 kPa and 0.470 kPa respectively.Based on the research results of this paper,the M-type shed has withstood the test of many typhoons.The superior wind resistance performance is verified based on real engineering,which provides a reference for the popularization and application.

关 键 词：M型塑料大棚 数值风洞 风荷载体型系数 极值风压 

分 类 号：S625.1[农业科学—园艺学]