锯齿轧花中含棉籽棉朵模型的构建与仿真

为方便分析锯齿轧花过程中籽棉的受力状况以期提高皮棉质量,在已有的层合板棉朵模型和三维编织棉朵模型基础上,提出了一种含棉籽的棉朵模型。该模型基于实际棉朵中棉籽以及棉纤维束排列呈立体网状结构的规律,假设纤维束具有圆形截面,截面形状沿轴向保持不变,在该模型的基础上利用ANSYS Workbench对轧花过程进行了模拟,研究了不同锯齿滚筒转速和棉籽密度对轧花过程的影响。结果表明:锯齿滚筒转速越大,棉纤维受影响越剧烈,但转速过大也会损伤棉纤维,棉籽密度在580 kg/m³时锯齿轧花效果最明显;实验值与模拟值误差相对较小,说明了模型的合理性。

Finite element simulation of cotton serrated ginning state based on cottonseed modeling

In order to analyze the stress state of seed cotton in serrated ginning process and improve the quality of lint cotton, a new model of seeded cotton was proposed in this paper based on the existing model of seeded cotton and the fiber network configuration in the actual seeded cotton. The bundled fibers were simulated to have a circular cross-section throughout the length of the fiber along the axis. On the basis of the model, ANSYS Workbench was used to simulate the ginning process, and the influence of different sawtooth speed and cottonseed density on the ginning process was analyzed. It can be seen from the results that the greater the is sawtooth speed, the more severe is the impact of the cotton fiber, but higher sawtooth speed is prone to causing damages to the cotton fiber. The effect of sawtooth ginning is most obvious when the cotton seed density is 580 kg/m³. The error between the experimental and the simulated values is small, which shows the rationality of the model.