Topology optimization of wheel drive planetary carrier

In order to improve the reliability of the wheel drive system and the service life of the transmission system of the large-tonnage mining dump truck, the finite element model of the planetary carrier is established. According to the stress characteristics, the load, and constraint conditions of the main load, the static analysis and modal analysis are carried out. It is found that the maximum deformation and the maximum equivalent stress are small, and the fifth order modal frequency is high, which can further optimize the structure. Based on the SIMP (solid isotopic material with penalization) interpolation model in the variable density method, the mathematical model of multi-objective function for improving stiffness and reducing flexibility is established by using a compromise programming method. The structure topology of the planetary carrier is optimized to find a more reasonable distribution of materials, and the optimized structure is obtained. Based on the optimization results, the new planet carrier was redesigned, and the dynamic and static performance simulation analysis was performed to ensure the rationality of the improved design of the planet carrier structure. The research shows that the simulation results verify the safety and reliability of the structure, the performance of the optimized planetary carrier can meet the requirements, and the mass is reduced by 14.5%. and a new structure is obtained which is better than the original one. (paper)