Prediction of Single Disc Seeding System Forces, Using a Semi-Analytical and Discrete Element Method (DEM) Considering Rotation Effects

Ali Khosravani, Jacky M. A. Desbiolles, Chris Saunders, Mustafa Ucgul () and John M. Fielke
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Ali Khosravani: STEM, University of South Australia, Adelaide, SA 5000, Australia
Jacky M. A. Desbiolles: STEM, University of South Australia, Adelaide, SA 5000, Australia
Chris Saunders: STEM, University of South Australia, Adelaide, SA 5000, Australia
Mustafa Ucgul: STEM, University of South Australia, Adelaide, SA 5000, Australia
John M. Fielke: STEM, University of South Australia, Adelaide, SA 5000, Australia

Agriculture, 2023, vol. 13, issue 1, 1-17

Abstract: Disc seeders are commonly used in no-till farming systems, and their performance evaluation generally rely on expensive and time-consuming field experiments. Mathematical models can help speed up force-related evaluations and improve the understanding of soil-disc interactions, to assist the performance optimisation processes. Previous analytical force prediction models of disc blades have not accounted for the free rotation aspect of the disc blade. This paper develops an analytical force prediction model from the wide blade failure theory adapted to suit rotating flat disc blades operating at different sweep and tilt angles and compares predictions with Discrete Element Method (DEM) simulations. To validate the two models, experiments were performed on a remoulded sandy soil condition using a rotating flat disc set at two tilt angles of 0 ° and 20 ° , and four sweep angles of 6, 26, 45 and 90° the 3-dimensional force components of draught, vertical and side forces were measured. Results showed a higher coefficient of determination (R 2 = 0.95) was obtained with analytical model predictions compared to DEM predictions (R 2 = 0.85) for their agreement with the test results. It was found that both the developed analytical approach and the DEM model can be used to predict tillage forces at different sweep and tilt angles acting on a rotating flat disc blade.

Keywords: flat disc; analytical force prediction model; discrete element method (DEM); soil-tool interaction (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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