Optimization of Structural Configuration and Ridge Height for Large-Span Insulated Plastic Greenhouse Based on Finite Element Analysis

作者：Xiaoxing Dong, Fengzhi Piao, Nanshan Du, Han Dong, Tao Zhang, Yanping Qin, Yaling Li, Zhixin Guo · 发表于：Agriculture · 年份：2025 · DOI：10.3390/agriculture15131333 · 被引用次数：5 · 研究领域：Greenhouse Technology and Climate Control

The large-span insulated plastic greenhouse is a highly promising horticultural facility. The design parameters and configuration of structural components significantly impact their safety and load-bearing performance. However, current research in this field remains insufficient. In this study, the deformation, stress distribution, and stability of large-span insulated plastic greenhouses with different structural configurations were investigated using the finite element method. Subsequently, the ultimate bearing capacity of large-span insulated plastic greenhouses with varying ridge heights was examined. The research indicated that the greenhouse with a plane truss and double-layer tie rod exhibited the smallest deformation and stress in its members, as well as the highest ultimate load-bearing capacity. The analysis revealed that the installation of double-layer tie rods not only enhanced the collaborative effect of arch frames within the structural calculation unit but also reduced displacement along the Z direction, effectively mitigated the P-∆ effect, reduced out-of-plane bending stress, and improved the ultimate load-bearing capacity. Ridge height affected the load-bearing capacity of the greenhouse structure. However, a higher ridge height did not necessarily result in a stronger ultimate load-bearing capacity. The greenhouse structure with a ridge height of 5 m demonstrated the maximum ultimate load-bearing capacity, capable of bearing 1.98 times the initial load. Th...