The invention discloses a vibration
analysis method, device, medium and equipment for a vehicle electric driving
system, and relates to the technical field of electric
digital data processing, and the method comprises the steps: analyzing excitation characteristics and gear engagement dynamic load parameters based on a motor electromagnetic excitation and
gear system dynamics model, and taking the excitation characteristics and the gear engagement dynamic load parameters as a mechanical excitation
coupling motor, gear, bearing and
shell model; according to the method, a rigid-flexible
coupling dynamic model is formed, after the rigid-flexible
coupling dynamic model is converted into a state-space equation, multivariable time-domain data are obtained through
nondimensionalization and piecewise linear method solving, and then the transmission efficiency value of vibration energy among a motor, a gear, a bearing and all parts of a shell is calculated based on excitation characteristic parameters, gear meshing dynamic load parameters and the multivariable time-domain data. And positioning a key
noise transmission path of the vehicle electric driving
system according to the transmission efficiency value. By comprehensively analyzing the vibration characteristics of the
system, the NVH problem of high-frequency howling and the like under the high-speed working condition is effectively solved.