Abstract
In order to study the vibration response of reducer of electric vehicle, a model for the reducer is established in ANSYS Motion, a multi-body dynamics software. Firstly, a 3D model of the reducer is built, including such assemblies as its shaft, gears, bearing, and its case. Secondly, based on the finite element model, the modal simulation is carried out. Finally, under the specified operating condition when the motor speed increases from 0 rpm to 10000 rpm, with using the STFT method, the vibration response of the reducer is obtained through the multi-body dynamics simulation. After comparing the simulation results between different marked nodes, the conclusion indicates that this process can calculate the vibration characteristics of the reducer quickly and accurately and can lay the foundation for the structural optimization in terms of vibration and acoustic properties.
Highlights
With the rapid development of the electric vehicle industry, the motor is constantly improving towards the direction of high efficiency and high-power density, and the speed of the motor is constantly increasing
In order to comply with the development trend of the motor, the input speed of the reducer matched with it is constantly improving, and the maximum input speed demand has reached more than 10000 rpm, which poses a huge challenge to the NVH of high-speed gear transmission [1]
The experimental results show that the reducer and differential mechanism are the main contribution components of vibration and noise of electric vehicle [3]
Summary
With the rapid development of the electric vehicle industry, the motor is constantly improving towards the direction of high efficiency and high-power density, and the speed of the motor is constantly increasing. Due to the demand for the characteristics of electric vehicle motors with high speed and high torque, and the lack of masking effect of engines, the gear noise is prominent [2]. Scholars have carried out the acoustic and vibration characteristic tests on pure electric vehicle driving system, and have analyzed the contribution components and causes of vibration noise. The experimental results show that the reducer and differential mechanism are the main contribution components of vibration and noise of electric vehicle [3]. Due to different kinds of processing and assembly errors and time-varying meshing stiffness and other factors, the meshing process produces vibration, which is transmitted to the box body through the gear shaft to cause vibration and radiates noise
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