Venlo型温室风荷载特性数值模拟研究  

Numerical Simulative Research on Venlo-type Greenhouse Wind Load Character

作　　者：陶冶[1] 吕家圣[1] 乔克[1] 袁军[1] 

机构地区：[1]西南大学工程技术学院,重庆400715

出　　处：《农机化研究》2014年第6期45-48,共4页Journal of Agricultural Mechanization Research

基　　金：中央高校基本科研业务费专项资金项目(XDJK2012C004)

摘　　要：风荷载是对温室结构影响最大、存在最为普遍的可变荷载,不同布置形式的Venlo型温室对风荷载的敏感程度存在差异。为全面掌握其表面风荷载分布规律,基于CFD计算平台,选取Realizable k-ε湍流模型和B类地貌作为研究的共同基础,对跨度分别为1跨、3连跨、5连跨和10连跨的Venlo型温室在0°,30°,60°和90°不同风向角情况下的表面风压分布情况进行数值模拟计算,求得相应的风压系数。结果表明:相同风力条件下,风向、跨度不同,温室表面风压分布也各不同;其中,单跨和斜风布置为最不利的布置形式。模拟计算结果为Venlo型温室设计时风荷载取值提供了参考,并提出最优布置形式。The wind load is variable load which has the largest influence and most general existance on the greenhouse structure.Different layout forms of Venlo-type greenhouse has differences on the sensitive extent of wind load.In order to grasp comprehensively the distributional regulation of surface wind load,the passage selects Realizable k-εturbulence nodal and B-type geomorphology for common basis of research based on the CFD calculation platform.Numerical simulation respectively to one span,three multi-span,five multi-span and ten multi-span Venlo greenhouse at 0°,30°,60° and 90° has been done for the surface wind pressure in different wind direction and obtain the corresponding wind pressure coefficient.The results show that：the same wind conditions,different span and wind direction,the wind pressure distribution of greenhouse surface is also different;the single span and oblique wind is arranged to layout the most unfavorable.The simulation results for Venlo type greenhousedesign wind load value for reference,and put forward the optimum layout.

关 键 词：VENLO型温室 风荷载 CFD 风压系数 

分 类 号：S625.1[农业科学—园艺学]