Otimização topológica do rotor de separação de debulha de uma colheitadeira agrícola

Abstract

Threshing separation rotors are widely used as in combines harvester as a flow separator that includes at least one rotary axis. Among the components of the rotor, the finger is one of the main ones because it is responsible for separating the grains and the straw. Nonetheless, this component has few studies aimed at increasing structural performance, especially in relation to optimization. This work aims to develop a topology optimization using a finite element (FE) model in order to reduce the mass of the finger. In the first step, the model is performed considering the pre-torque of the screw and the bending load that the straw generates on the finger. Besides, the normal and tangential contacts are considered between the components. Then, the topology optimization is performed by Solid Isotropic Material with Penalization (SIMP) method. The objective function is defined as minimizing the volume of the finger subject to von Mises stress and displacement constraints. The topology optimization results present that the volume reduced achieve 59,81% in comparation with original model.