چكيده به لاتين
Today, the use of electric vehicles in urban transportation is increasing day by day due to environmental considerations. In this thesis, the optimal design of the drive shaft of a small two-seater electric car in the L6e class is carried out. In this regard, the functional requirements of the vehicle level and then the requirements of the system level such as the natural frequency and the maximum load of the drive shaft are formulated first. to check the level of the vehicle, first, vehicle dynamic calculations of the EQ10 electric vehicle are performed, such as the calculation of the center of mass and the static and dynamic forces of the vehicle. to check the gradeability on the car, the acceleration and torque on different slopes of the road, the sliding angle and the maximum speed of the car are calculated. After that, to check the requirements of the system level, at first, the parts of the drive shaft, including the housings, shaft, tripod joint, and ball bearing, are modeled in CAD, and then, using Hyper-Mesh, they are elementized as 3D elements with specific element sizes. Then, the elementized parts are analyzed in Abaqus with certain conditions. After that, the parameters of natural frequency, critical speed, torsional stiffness and yield strength are extracted and the results are analyzed. After extracting the results by considering the design variables as the objective function and strength constraints and other requirements, optimization has been done using the Taguchi method and according to the optimization results, the torsional stiffness characteristic has increased by 10% compared to the initial design And the yield strength of the drive shaft has been reduced by 5%.
