基于ANSYS的电动汽车2AMT壳体强度与模态分析

Strength and modal analysis of the 2AMT shell of an electric vehicle based on ANSYS

两档机械式自动变速器(2AMT)因其可以进一步提升电动汽车的动力性与经济性而被广泛研究。在设计2AMT过程中,需要对其进行反复校验、优化以同时满足轻量化、高强度、低噪音等要求。根据经典力学理论,对2AMT的电机以最大扭矩输出时齿轮、齿轮轴和壳体的受力进行了分析。基于有限元分析理论,利用ANSYS软件对壳体进行强度与模态分析,并根据分析结果对结构进行了优化。结果表明,2AMT壳体满足强度要求,优化结构使最大形变减少0.057 mm、最大应力减少20 MPa,且其固有频率能够避开常见转速范围内的齿轮啮合冲击频率。

2AMT(two-speed mechanical automatic transmission)is widely studied because it can further improve the power and economy of electric vehicles.2AMT designing process involves repeated assessments and optimizations to meet the requirements of light-weight,strength,and noise control.The force on the gear,gear shaft,and shell is analyzed when the 2AMT motor is running with maximum torque output.Based on the finite element analysis theory,ANSYS software is used to analyze the strength and modal of the shell,and the analysis results are used to optimize the 2AMT structure.Results show that the 2AMT shell meets the strength requirements,and the optimized structure reduces the maximum deformation by 0.057 mm and the maximum stress by 20 MPa,and its natural frequency can avoid the gear meshing impact frequency in the common speed range.