Development of threshing cylinder simulation model of combine harvester for high-speed harvesting operation

Min Jong Park1, Hyeon Ho Jeon2, Seung Yun Baek2, Seung Min Baek2, Su Young Yoon2, Jang Young Choi3, Ryu Gap Lim4,*, Yong Joo Kim1,2,*

1Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Korea
2Department of Smart Agriculture Systems, Chungnam National University, Daejeon 34134, Korea
3Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
4Department of Smart Agriculture, Korea Agriculture Technology Promotion Agency, Iksan 54667, Korea

*Corresponding author:,


The purpose of this study is to develop a high-speed combine harvester. The performance was evaluated by composing a dynamic simulation model of a threshing cylinder and analyzing the amount of threshed rice grain during threshing operations. The rotational speed of the threshing cylinder was set at 10 rpm intervals from 500 rpm until 540 rpm, based on the rated rotational speed of 507 rpm. The rice stem model was developed using the EDEM software using measured rice stem properties. Multibody dynamics software was utilized to model the threshing cylinder and tank comprising five sections below the threshing cylinder, and the threshing performance was evaluated by weighing the grain collected in the threshing tank during threshing simulations. The simulation results showed that section 1 and 2 threshed more grains compared to section 3 and 4. It was also found that when the threshing speed was higher, the larger number of grains were threshed. Only simulation was conducted in this study. Therefore, the validation of the simulation model is required. A comparative analysis to validate the simulation model by field experiment will be conducted in the future.


combine harvester, cylinder, discrete element method, simulation, threshing

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