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      저자 : Rahmanian-Koushkaki Hossein (검색결과 1 건)
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        Simulation of Draught Force During Chisel Ploughing Using Discrete Element Method

        Rahmanian-Koushkaki Hossein,Mahmoodi-Eshkaftaki Mahmood,Azimi-Nejadian Hadi 한국농업기계학회 2022 바이오시스템공학 Vol.47 No.2

        Purpose Chiseling is an essential tillage practice in conservation tillage systems. One of the main methods in soil–tool behaviour analysis of a tillage implement like chisel plough is numerical simulation. The discrete element method (DEM) is one of the most powerful techniques for this purpose. In this study, draught force of a mounted type chisel plough with nine C-shanks was predicted using DEM when working in a clay-loam soil. Methods The effects of forward speed (3, 4 and 5 km h-1) and working depth (10, 15 and 20 cm) on the draught force were investigated. The available commercial EDEM software was used for the simulations, and combination of hysteric spring with cohesion/adhesion forces was employed as the contact model. Results The numerical results were compared to experimental trials and well-known analytical model (McKyes and Ali) results. The experimental results were obtained to be within 3.24–34.9% and 9–35% larger than DEM-simulated and analytical calculated draught, respectively. A regression equation was developed in accordance with the simulated data. According to the values of statistical parameters (R2, RMSE and MRD), the established model had good accuracy. Conclusions From the simulations, it was concluded that draught force increased with an increase in working depth and forward speed. Also, it was found that the DEM results had higher accuracy than analytical results.

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