Análise estrutural da suspensão dianteira de um mini baja

Abstract

There is a great demand to the structural reliability of the systems and components of the off road racing vehicle, especially the suspension system since it is responsible for absorbing the impacts resulted from the irregularity of the ground and obstacles present in the dynamic tests. Because of that, a structural analysis of the low arms and wheel end of the front double wishbone suspension of a mini baja with help of Ansys, a CAE software, was made. For this analysis, it was considered ¼ of the model of the vehicle, defining the following boundary condition: A vehicle suspended 0.7 meters in height falls free and hits the ground with all four wheels simultaneously considering a rigid system to estimate mathematically the forces. In addition, the force of contact between the tire and the ground and the resulting force on the lower lower tray buffer holder of the mini baja for the impact time of 0.02 seconds was calculated, obtaining then the maximum deformations and tensions of the components analyzed. Throughout the study, the minimum impact duration was found for the forces to result in a stress close to the stress of the material flow of the components (bottom tray and shaft tip) within the established contour condition. From the analysis it can be concluded that the design and manufacture of the front suspension of the vehicle must ensure that the damping of the system is sufficient to ensure that the impact duration for the defined contour condition is greater than 0.182 seconds, that for an impact time of less than 0.182 seconds the input force (FZP) will result in a voltage higher than the material flow stress in the lower trays.