某纯电动汽车减速器模态分析

Modal Analysis for Transmission of a Pure Electric Vehicle

减速器是纯电动汽车的关键部件。在提高车辆最高速度,缩短车辆加速时间的同时,对纯电动汽车的振动噪声特性有着十分直观的影响。以某纯电动汽车的减速器为研究对象,对其减速器箱体及传动装置的模态特性进行分析。首先,根据该纯电动汽车减速器工程图,建立减速器的三维实体模型。然后,通过软件导入已建立的模型,选择减速器箱体及传动系统材质。对箱体及传动装置进行网格划分。最后,通过有限元分析,选取分块兰索斯法(Block Lanczos),输出前6阶模态固有频率和振型。发现减速器传动装置及箱体的固有频率远离传动系统特征频率,不会产生共振。研究结果可为后续优化研究提供参数依据。

Transmission is the key component of pure electric vehicles. It has a direct influence on the vibration and noise characteristics of the pure electric vehicle for improving the maximum speed and shortening the acceleration time of the vehicle. This study analyzes the reducer housing and the modal characteristics for the transmission of a pure electric vehicle. First, a three-dimensional solid model of the transmission is established according to the engineering drawings of the pure electric vehicle transmission. Then, established models is imported through software, reducer housing and material of transmission system are chosen, and the reducer housing and transmission system are meshed. Finally, the first six order modes are outputted by finite element analysis and Block Lanczos method. The natural frequencies and mode shapes are obtained. It is shown that the frequency of transmission system and reducer housing stay away from the system characteristic frequency which will avoid from resonance. The research results can provide the parameter basis for the follow-up optimization research.