整杆式巨菌草双圆盘切割装置动力学研究与参数优化

巨菌草收获机切割器的模型与工作参数直接影响到收割能耗与质量。基于虚拟样机设计技术与切割仿真理论，利用ugnx1847参数化建立整杆式巨菌草双圆盘切割器三维实体模型及巨菌草物理模型，在adams/view模块中将巨菌草茎秆柔性化，导入adams中完成虚拟样机设计并进行刚柔耦合动力学仿真分析，试验验证虚拟样机设计及仿真的正确性。以刀盘倾角、刀片刃角、刀盘转速为影响因素，切割茎秆的切割力为评价指标表征切割损耗，对影响切割力与切割损耗的因素设计三因素三水平虚拟正交试验，运用统计学软件进行响应面回归分析和方差分析。结果表明：切割器转速为480 r/min，刀片刃角为25°，刀盘倾斜角为2°时，切割力为最低水平266 N，切割损耗有效降低，为巨菌草切割器关键部位的优化设计提供理论和试验依据。

Kinetics research and parameter optimization of the whole rod giant Juncao double disc cutting device

The model and working parameters of the cutter of the giant Juncao harvester directly affect the energy consumption and quality of harvesting. Based on the virtual prototype design technology and cutting simulation theory, the ugnx1847 parameterization is used to establish the three dimensional solid model of the whole rod double disc cutter of Juncao and the physical model of Juncao, and the stalk of Juncao is flexible in the adams/view module, imported into adams to complete the virtual prototype design and the rigid flexible coupling dynamics simulation analysis, the experiment verified the correctness of the virtual prototype design and simulation. Taking the inclination angle of the cutter head, the blade edge angle, the rotational speed of the cutter head and the forward speed as the influencing factors, and the cutting force of cutting the stalk as the evaluation index to represent the cutting loss, a three factor and three level virtual orthogonal experiment was designed for the factors affecting the cutting force and cutting loss, using statistical software to carry out response surface regression analysis and variance analysis. The results show that the cutter speed is 480 r/min, the blade edge angle is 25°, and the cutting force is the lowest level of 266 N when the cutter head tilt angle is 2°, and the cutting loss is effectively reduced. It provides theoretical and experimental basis for the optimal design of key parts of the giant Juncao cutter.