| The rise of the electric vehicle industry is a consensus reached by the international automobile industry. During the assembly of electric vehicle, frame is loaded the quality and impact of most vehicle parts, all kinds of force and moment from the road surface are transferred to the frame through tires and suspensions. The frame is a complicated stress structure. Not only static stiffness and strength characteristics of frame need to suit the requirements but also the dynamic characteristics should be favorable. Passengers' comfort and safety should be ensured without overall resonance.In order to verify the security and stability of the multifunctional electric car frame,the finite element model of the frame is established in the ANSYS/Workbench, the optimal meshing scheme is obtained through experiment, the static analysis of snowremover frame and transport vehicle frame is carried out under the working conditions of full load bending, full load torsion and emergence braking, the improvement direction of the frame is determined by total deformations and stress distributions. The free modal is analyzed to check the accuracy of the frame structure, the constraint modal is analyzed under actual situation to obtain the natural frequency and vibration mode of the frame under working condition, the influence of the pavement and motor is analyzed;furthermore, through Adams and ANSYS combing simulation, the dynamic analysis of the frame is carried out, the displacement and stress of the dangerous points in the frame are obtained to verify the safety of the frame; finally, according to the results of the dynamic and static analysis, the structure improvement scheme of the frame is put forward, and the feasibility of the improved scheme is verified.Through the improvement of the frame structure, the frame stiffness and strength can meet the design requirements, energy cost and16.86%of the quality are reduced, and the electric vehicle mileage is improved indirectly. By using the finite element method,the structure of the frame is evaluated, the scheme can be used to reduce the design cost. |
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