이산요소법-다물체동역학 연성해석 모델을 활용한 로타리 경운작업 시표면 에너지에 따른 PTO 소요동력 예측

In this study, we predicted PTO power requirements based on torque predicted by the discrete elementmethod and the multi-body dynamics coupling method. Six different scenarios were simulated to predict PTOpower requirements in different soil conditions. The first scenario was a tillage operation on cohesionless soil, andthe field was modeled using the Hertz-Mindlin contact model. In the second through sixth scenarios, tillageoperations were performed on viscous soils, and the field was represented by the Hertz-Mindlin + JKR model forcohesion. To check the influence of surface energy, a parameter to reproduce cohesion, on the power requirement,a simple regression analysis was performed. The significance and appropriateness of the regression model werechecked and found to be acceptable. The study findings are expected to be used in design optimization studies ofagricultural machinery by predicting power requirements using the discrete element method and the multi-bodydynamics coupling method and analyzing the effect of soil cohesion on the power requirement.