摘要
为分析滑盖式节能日光温室整体静力及优化骨架结构,采用ANSYA有限元分析软件,模拟滑盖处于开、合两种状态时,4种荷载工况下结构的整体稳定性和变形过程,确定了最不利荷载组合工况。对最不利荷载组合工况下的滑盖式节能日光温室骨架结构进行优化求解,设置允许优化迭代和非可行域内迭代次数、设置总用钢量最小为目标函数、对骨架截面进行参数优化,得到了滑盖式节能日光温室的最优解以及上、下弦杆件截面尺寸与等效应力的关系表达式。结果表明:在滑盖打开状态时风荷载作用下的结构变形最大,其最大等效应力值为203 MPa,最大位移为4.04 mm;优化迭代25次后得到最优解,优化后,其总用钢量降低1.63%,最大位移变形增加48.8%,从而杆件得到了更加充分的利用。上弦杆长细比与等效应力的表达式y=8.9x+175.5、下弦杆长细比与等效应力的表达式y=5.1x+205.5,其均符合长细比越大等效应力越大的规律;优化后有效降低了滑盖式节能日光温室的钢材用量,提高了滑盖式节能日光温室的经济效益。该研究结果为滑盖式节能日光温室设计提供理论参考。
In order to study the static analysis and skeleton structure optimization of sliding-cover energy-saving solar greenhouse.In this paper,ANSYA finite element analysis software is used to simulate the overall stability and deformation process of the structure under four load conditions when the slide cover is in two states:open and closed,and the most unfavorable load combination conditions are determined.By optimizing the skeleton structure of the slide-covered energy-saving solar greenhouse under the most unfavorable load combination condition,setting the number of allowable optimization iterations and non-feasible domain iterations,setting the minimum amount of steel used as the objective function,and optimizing the skeleton section parameters,the optimal solution of the slide-covered energy-saving solar greenhouse and the relationship between the section size of the upper and lower chord members and the equivalent stress were obtained.The results show that the structure deformation under wind load is the largest when the slide cover is open.The maximum equivalent stress value is 203 MPa and the maximum displacement is 4.04 mm.After 25optimization iterations,the optimal solution is obtained.After optimization,the total steel consumption is reduced by 1.63%,and the maximum displacement deformation is increased by 48.8%,so that the rod can be more fully utilized.The expression y=8.9x+175.5for the slenderness ratio and the equivalent stress of the upper chord,and y=5.1x+205.5 for the lower chord,both conform to the law that the larger the slenderness ratio is,the larger the equivalent stress will be.After optimization,the steel consumption of sliding solar greenhouse is reduced effectively,and the economic benefit of sliding solar greenhouse is improved.The research results provide reference for the design of energy-saving solar greenhouse with sliding cover.
作者
刘艳华
王晓倩
王聪
张峰
LIU Yan-hua;WANG Xiao-qian;WANG Cong;ZHANG Feng(College of Water Conservancy,Shenyang Agricultural University,Shenyang 110161,China)
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2023年第1期112-120,共9页
Journal of Shenyang Agricultural University
基金
辽宁省重点研发项目(021JH2/10200022)
辽宁省自然科学基金面上项目(2020-MS-201)。
关键词
滑盖式节能日光温室
有限元分析
结构优化
参数优化
slide type energy saving solar greenhouse
finite element analysis
structure optimization
parameter optimization
