Strip tillage seeders have shown great advantages in seedbed preparation and residue handling in no and minimum tillage seeding. However, soil disturbance and torque requirements need to be further reduced. To address this issue, the simulation in this study used the discrete element method (DEM) to examine the effect of different edge-curve geometries on torque requirements and soil disturbance characteristics. Herein, the edge-curve geometries include three types of plain-straight blades (Archimedean spiral, logarithmic spiral, and sinusoidal-exponential spiral blades) with four slide-cutting angles of edge-curve tip (30°, 40°, 50°, and 60°). The model particle (i.e., ball-ball) stiffness k_n was calibrated through a soil bin test, and the optimum value was 6 × 10³ N/m. The results showed that the blade rotation angle varied with respect to the slide-cutting angle of the edge-curve tip when the soil cutting started and the peak value occurred: the larger the slide-cutting angle was, the earlier the soil cutting began and the peak value appeared. Among the three edge-curve types, the Archimedean spiral blade (which had the largest average slide-cutting angle) obtained the highest average torque and the largest number of soil particles thrown upward, whereas the sinusoidal-exponential spiral blade (which had the smallest average slide-cutting angle) obtained the lowest values in both metrics. As the slide-cutting angle of the edge-curve tip increased, the average torque requirement decreased and fewer soil particles were thrown upward, indicating that a larger slide-cutting angle was preferred when less soil disturbance was desired.

条播耕种机在免耕和最少耕种的苗床准备和残渣处理方面显示出巨大优势。但是，土壤干扰和扭矩要求需要进一步降低。为了解决这个问题，本研究中的仿真使用离散元方法（DEM）来检验不同的边曲线几何形状对扭矩要求和土壤扰动特性的影响。在此，边缘曲线的几何形状包括三种类型的平直刀片（阿基米德螺旋形，对数螺旋形和正弦指数形螺旋形刀片），具有四个曲线形的边缘曲线尖端（30°，40°，50°，和60°）。通过土壤箱试验对模型颗粒（即球）的刚度k _n进行校准，最佳值为6×10 ³N /米 结果表明，当土壤切割开始并出现峰值时，铲刀旋转角度相对于边缘曲线尖端的滑动切割角度变化：滑动切割角度越大，土壤切割开始越早，且切割开始越快。出现峰值。在这三种边缘曲线类型中，阿基米德螺旋叶片（具有最大的平均滑切角）获得了最高的平均扭矩和最多的向上抛出的土壤颗粒，而正弦指数螺旋叶片（具有最小的正向指数螺旋叶片）平均滑动切割角）在两个指标中均获得了最低值。随着边缘曲线尖端的滑动切割角度的增加，平均扭矩要求降低，向上扔的土壤颗粒更少，