Authors

Abstract

This study utilized ABAQUS finite element software to model a flat-elliptical pipe greenhouse, focusing on the contact interactions among the greenhouse film, structural frame, and film-tensioning lines. A nonlinear finite element method was employed to investigate variations in contact pressure and shear stress under different prestress conditions of the greenhouse film and film-tensioning lines. The results showed that increasing the prestress of the greenhouse film increased contact pressure but decreased shear stress, whereas increasing the prestress of the film-tensioning lines raised both contact pressure and shear stress. Optimizing the combined prestress of the greenhouse film and film-tensioning lines can enhance the mechanical performance and wind resistance of the greenhouse structure.

Abstract in Chinese

本研究利用ABAQUS有限元软件对平椭圆管塑料大棚进行建模，重点分析棚膜、骨架和压膜线之间的接触作用。通过非线性有限元方法，研究了不同棚膜和压膜线预应力条件下接触压力与剪应力的变化规律。结果表明，棚膜预应力增大时，接触压力增大，接触剪应力减小；压膜线预应力增大时，接触压力和剪应力均增大。合理调整棚膜和压膜线的预应力组合，有助于优化棚膜结构的力学性能和抗风能力。