Modal Sensitivity Analysis and Optimization Design of Direct-Connected Electric Drive Axle Housing
In order to improve the low order modal frequency of electric drive axle housing of pure electric vehicle,the modal sensi-tivity analysis and optimization design of direct electric drive axle housing are carried out.Firstly,the simulation model of the di-rect-connected electric drive axle housing is established,and the first six modal frequencies are obtained by modal analysis and compared with the results of the axle housing hammer test to verify the credibility of the simulation model.Secondly,the thickness of each section of the bridge shell is selected as the design variable,and the difference method is used to calculate the sensitivity of the modal frequency of the bridge shell to the design variable.Then,according to the modal sensitivity analysis results of the bridge shell,the variables are selected for optimization,and the optimization design is carried out with the goal of improving the low-order modal frequency of the bridge shell and the constraint of mass and maximum displacement.Finally,the strength and stiffness of the optimized bridge shell are checked.The results show that the design variables selected after modal sensitivity analy-sis of the direct-connected electric drive axle housing increase the low-order modal frequency by about 12Hz after optimization de-sign,and the optimization effect is significant.
Pure Electric VehicleDirect-Connected Electric Drive AxleSensitivity AnalysisModal FrequencyOptimization Design
NETL
NSTL
万方数据
维普
