雪载荷工况下连栋塑料温室结构稳定性的研究  

Stability Research of Multi-span Plastic Greenhouse on Snow Load Condition

作　　者：王新忠[1] 马兴超[1] 孙菲[2] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室,江苏镇江212013 [2]江苏科技大学材料科学与工程学院,江苏镇江212013

出　　处：《农机化研究》2011年第12期40-42,50,共4页Journal of Agricultural Mechanization Research

基　　金：江苏省科技支撑计划项目(BE2008323);江苏农机三项工程项目(NJ2011-46);昆山市农业科技计划项目(KN1037);昆山市国际科技合作项目(KZ1011);江苏省农业装备与智能化高技术研究重点实验室项目(BM2009703)

摘　　要：选取双圆弧尖顶结构的连栋塑料温室为研究对象,采用双重非线性屈曲分析的方法,探讨连栋塑料温室结构的稳定性问题。在ANSYS10.0软件中,分别对不同拱架曲率半径下连栋塑料温室整体结构模型进行双重非线性屈曲计算,跟踪顶部节点整个线载荷-位移全过程的平衡路径,确定连栋塑料温室整体结构的屈曲模态和临界线载荷。结果表明:该方法对连栋塑料温室结构稳定性的研究有较好的适用性,且当拱架曲率半径为5 000mm时,连栋塑料温室结构临界线载荷随拱架曲率半径的变化不明显。In this paper,the integral structure of multi-span plastic greenhouse was taken as the research subject,and the stability of multispan plastic greenhouse was studied by dual nonlinear analysis.On snow load condition,the computational moeels of different radius of curvature were calculated by dual nonlinear method,and the ultimate bearing capacity was confirmed by racing the whole balance path of loading-displacement curve.It can be concluded that,the method is suitable for stability research of multi-span plastic greenhouse,and radius of curvature has obvious influence on stability of multi-span plastic greenhouse,and when its radius of curvature is 5000mm,the ultimate bearing capacity of multi-span plastic greenhouse is not significantly affected by variation of radius of curvature.

关 键 词：连栋塑料温室 稳定性 雪载荷 有限元分析 

分 类 号：S625.1[农业科学—园艺学]