基于Abaqus的缺口圆盘刀开沟作业有限元仿真及分析

为分析免耕播种机破茬开沟部件开沟作业时圆盘刀与土壤之间的相互作用情况,在Abaqus有限元分析软件中建立了圆盘刀——土壤侵彻的三维动态有限元模型,在Explicit动态显示模块下进行仿真试验分析。搭建了基于室内土槽的圆盘刀牵引平台,通过土槽试验对有限元模型的正确性、有效性进行验证,结果表明:该有限元模型能准确模拟圆盘刀在土壤上进行开肥沟作业的过程。选取机组前进速度、圆盘刀入土深度和圆盘刀刀面与前进方向之间偏角等作为试验因素进行基于上述有限元仿真的正交试验,得到各因素及其一阶交互作用对模型中肥沟深度和宽度的影响规律。同时得到:在机组前进速度为1.67 m/s、圆盘刀入土深度为12cm、圆盘刀面偏角为6°时,破茬开沟部件所开肥沟质量最佳。

The Finite Element Analysis and Simulation of the Gap Disc Trenching Based on ABAQUS

In order to analysis the interaction between the no-till planter gap-disc and soil, we set up the disc-soil dy-namic three-dimensional finite element model on Abaqus and proceed simulation experiment analysis under the its explic-it dynamic display module.Established a traction platform based on the indoor soil bin and examined the validity and re-liability of finite element model through it.The results show that the finite element model can simulate the process accu-rately.Forward speed, disc buried depth and angle between the disc surface and advance direction ( deflection angle) were selected as three factors of the orthogonal simulation experiment.Explored the effect regularity on the depth and width of the fat groove caused by the factors and the primary reciprocal actions between each factor.At the same time , it can be seen that the quality of groove is best when it was selected 1.67 m/s as the forward speed, 12 cm as the disc buried depth ,6°as the angle between the disc surface and advance direction.