Finite Element Simulation of Frame Structure of Cutting Table on Rape Combine Harvest

摘要

In this paper, the frame structure of cutting table on 4LYZ-2 rape harvest, which was refitted from 4LZ-2 combine harvest by adding a vertical cutter, has been investigated using the finite element method under inertia loads and transient load to examine the rationality of refit. 3-D solid model of the frame structure of cutting table on 4LZ-2 combine harvests and that of refitted (4LYZ-2 rape harvest) were built in popular CAD software Solidsworks. Then the models were imported into ANSYS. By inputting the stiffness and density properties as properties of material, selecting element, meshing the model, specifying the boundary condition, the finite element model were obtained. All the dynamic analysis and post processing were executed using ANSYS. The natural frequencies and modal shapes of the structures were available as a result of modal analysis. The response of the structure under the inertia load and transient load were simulated in harmonic analysis and in transient analysis. The inertia loads caused by drive machines, which motivate the horizontal cutter and vertical cutter respectively, were obtained using ADAMS software (Automatic Dynamic Analysis of Mechanical System). The transient load caused by impact when cutting the stem of the rape was measured by self-designed measure system. According to the result of simulation, optimization design was done, and the result of the optimization is acceptable.