Dimensionamento e otimização estrutural aplicada em uma caixa de redução de veículo tipo Baja SAE

Abstract

The present work seeks to develop a gearbox for a Baja SAE vehicle for the Fenris Baja team, from the UTFPR Guarapuava campus. In addition to the structural optimization of the housing, the shafts, gears and bearings of the gearbox were dimensioned. The operating parameters were defined as: the input torque and speed in the gearbox, maximum force between the wheel and the ground surface with the objective of not causing loss of traction, the output torque of the gearbox and the transmission ratio of the gearbox. With the parameters defined, the gears were dimensioned according to the AGMA standard and the shafts were sized according to the DE-Goodman criterion. The shafts and housing were analyzed using the Finite Element Method to obtain stresses, maximum deformations, and static and fatigue safety factors. The shafts and housing underwent parametric optimization in the Ansys ® software, in order to reduce mass and maintain stiffness. The set achieved a mass reduction of 11.4%.