为提高温室骨架受力性能，证明装配式骨架在日光温室结构中的可行性，并优化日光温室骨架的装配设计，以陕西省杨凌区某日光温室为研究对象，选取椭圆形单管骨架结构，在内置与外置装配件2种不同连接方式下进行节点设计及有限元分析。分别选取8、9、10 cm 3种常见规格的装配件与椭圆钢管进行组装，运用ANSYS软件分别计算装配式椭圆管跨中连接部位在5、7、10 kN的集中力作用下节点的受力和变形情况，再设置未截断椭圆钢管作为对照组进行比对。结果表明，当装配式日光温室椭圆管内置10 cm长连接件时结构变形量最小。此外，当主管截面角度取10°时所受应力最小。研究开发出椭圆形装配式骨架并为其开发装配节点，通过静力试验研究装配式骨架受力性能，最后通过有限元数值模拟验证静力试验的可靠性和日光温室骨架装配化设计的可行性。该研究可为日光温室椭圆骨架的装配式开发及装配式节点的优化提供依据。
Experimental Study and Finite Element Analysis of Assembled Elliptical Skeleton Nodes for Solar Greenhouse
In order to improve the mechanical performance of the greenhouse skeleton,prove the feasibility of the assembled skeleton in the solar greenhouse structure,and then optimize the assembly design of the solar greenhouse skeleton,this study took a solar greenhouse in Yangling District of Shaanxi Province as the research object,and selected the oval single tube skeleton structure.The joint design and finite element analysis were carried out under two different connection modes of internal and external assembly.Three common specifications of 8 cm,9 cm and 10 cm were selected to assemble the elliptical steel pipe respectively.ANSYS software was used to calculate the force and deformation of the joints at the connection parts of the assembled oval pipe span under the concentrated force of 5 kN,7 kN and 10 kN,and then the untruncated elliptical steel pipe was set as the control group for comparison.The results showed that the structural deformation of the assembled solar greenhouse was minimal when the 10cm long connector was placed in the oval tube.In addition,when the main section angle was 10°,the stress was the least.In this study,the elliptical assembled skeleton and the assembly node for it were developed.The mechanical performance of the assembled skeleton was studied by static test.Finally,the reliability of the static test and the feasibility of the assembly design of the solar greenhouse skeleton were verified by finite element numerical simulation.This study can provide a basis for the assembly development of elliptical skeleton and the optimization of assembly joints in solar greenhouse.
solar greenhousefacility agricultureoval skeletonassembly typefinite element analysis
国家科技期刊平台
NSTL
万方数据
