Draft force is an important dynamic parameter for agricultural soil-engaging tools and implements. Soil-disc interaction dynamics has changed enormously in modern tillage practice because of the use of larger machines, faster speeds, and different tool arrangements. Most existing studies on draft force prediction are for conventional tillage. In this study, a discrete element model (DEM) was developed to predict draft forces for high-speed (12 km h⁻¹ or higher) tillage. Draft forces were measured for an individually mounted disc using soil bin tests at low speeds in a sandy loam soil. Results were compared for the accuracy with the predicted values from the ASABE standard equation. Results showed that relative error ranged from 8% to 14%. Due to the limitations of the testing facility, the DEM model was calibrated using 6 km h⁻¹ tillage speed and verified with other test speed measurement. The calibrated model was able to predict draft force with a minimum relative error of 1%. The calibrated particle stiffness, was found to be 20 kN m⁻¹. The calibrated model was then used to examine the effects of operating parameters including gang angle, tilt angle, operating speed, disc diameter and tillage depth on draft forces at 16 km h⁻¹. From these simulations, it was shown that draft increased with an increase in gang angle, tillage depth, and speed. The draft force was reduced with an increase in tilt angle and remained relatively constant with the change of disc diameter. Finally, the simulated data were used to develop a multivariate regression equation to predict the draft for a high-speed tillage operation. This equation is suitable for the soil conditions studied and further validation is required to verify this equation.

牵引力是用于农业土壤耕作工具和工具的重要动态参数。由于使用了更大的机器，更快的速度和不同的工具布置，在现代耕作实践中，土-盘相互作用的动力学发生了巨大变化。现有的大多数关于吃水力预测的研究都是针对传统耕作的。在这项研究中，开发了离散元素模型（DEM）来预测高速（12 km h ^-1或更高）耕种。在沙质壤土中，通过土壤箱测试以低速测量了单独安装的圆盘的吃水力。将结果的准确性与ASABE标准方程式的预测值进行比较。结果表明，相对误差范围为8％至14％。由于测试设备的限制，DEM模型使用6 km h ^-1耕作速度进行了校准，并通过其他测试速度测量进行了验证。校准后的模型能够以最小相对误差1％预测吃水力。发现校准的颗粒刚度为20kNm ^-1。然后使用校准后的模型检查工作参数（包括帮角，倾斜角，工作速度，圆盘直径和耕作深度）对16 km h时的吃水力的影响。^-1。从这些模拟中可以看出，吃水深度随着组角，耕作深度和速度的增加而增加。牵伸力随着倾斜角的增加而减小，并且随着盘直径的变化而保持相对恒定。最后，模拟数据用于建立多元回归方程，以预测高速耕作作业的吃水深度。该方程式适用于研究的土壤条件，需要进一步验证以验证该方程式。