Modal Analysis on Vibration Characteristics of Gearbox for Electric Vehicle

In this dissertation, the gearbox of a mini electric vehicle was taken as research object, the finite element model of the gearbox was built in ABAQUS, and the free modal of the whole gearbox system was obtained. The modal test was carried out as to the integrated system by the application of Poly MAX using LMS Test.Lab. Contrastive analysis was conducted for the frequency and mode of vibration between experimental modal and the FE model. The analysis proofed a satisfied dynamic performance of the FE model, also the simplification of the model was validated. At a given vehicle speed, the first natural frequency of the gearbox and the meshing frequency is equal by modal analysis, so the resonance will be happened. And effective measures should be taken to avoid it.