采用离散元非线性模型模拟了单螺杆挤出固体输送段末端有约束情况下的粒子输送,预测了压力、填充率以及配位数沿固体输送方向的变化情况。结果表明:压力在固体输送段内沿挤出方向呈不均匀增大趋势,靠近进料口区压力很小,但靠近输送段末端的区域压力增大很快。 The discrete element nonlinear model was used to simulate the particle transport under the constraint of single-screw extrusion solid conveying section and predict the change of pressure, filling rate and coordination number along solid conveying direction. The results show that the pressure tends to increase unevenly along the extrusion direction in the solid conveying section and the pressure near the inlet section is very small, but the pressure near the end of the conveying section increases rapidly.