Konan Eric Konan1, Aka Stéphane Koffi2, and Kouadio Michel Kouame3
1 UFR Sciences of Structures of Matter and Technology, Félix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
2 UFR Sciences of Structures of Matter and Technology, Félix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
3 UFR Sciences of Structures of Matter and Technology, Félix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
Original language: English
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Abstract
This study analyzes the behavior of a Warren truss for a greenhouse using the finite element method. The truss consists of 50 nodes and 47 identical galvanized steel bars with a span of 5.04 m. It is intended to support an agrivoltaic greenhouse. The objective is twofold: first, to determine the truss’ response to external stresses at these nodes—elongations, deformations, stresses, and normal forces in the bars-and second, to understand the modal deformations. This study is part of the development of a calculation tool for designing structures to address our specific challenges. This work is a static analysis of a flat truss beam of hinged bars for a greenhouse, aimed at optimizing agricultural production. It also incorporates the vibration analysis of the truss, including the determination of its natural modes. A calculation program was developed using matrix calculation software, Matlab R2022b. The results are consistent with the RDM 7 structural analysis software. The maximum stress is -3.3305 MPa (compression). This is considerably higher than the material’s elastic limit of 220 MPa. These results also confirm the suitability of the structure for agrivoltaic greenhouses. The natural frequencies vary from W1 = 266 rad/s to W47 = 24894 rad/s; W24 = 14232 rad/s is shown in the illustration.
Author Keywords: study, statics, vibration, beam, Warren, natural mode.
