Structural strength and life analysis of an electric drive axle shell based on the measured load spectrum
JIANG Liangxing
NI Dacheng
YAO Chao
HUANG Qing
QING Xinhui
Abstract：Accurately predicting the fatigue life of products plays an important role in the structural strength design and reliability design of key components of electric vehicles.Starting from the measured road load spectrum of the reinforced road,a method for data processing and analysis of measured load spectrum was proposed,based on the Miner criterion,the load data of the vehicle under no-load,half-load and full load were obtained,and the key data for vibration simulation analysis and indoor bench test were obtained through time-domain frequency domain processing and damage equivalent treatment.A parallel-shaft electric drive axle was designed and developed,the statics analysis and modal analysis were carried out for key components such as the bridge shell,and the results concluded that the bridge shell would not have torsion and bending caused by road surface excitation.Based on nCode DesignLife simulation analysis software,the fatigue life and damage value distribution of the bridge shell were obtained,and the accuracy of the simulation analysis was verified by the bridge shell durability test.Based on the measured road load spectrum of the reinforced road,a 15 000 km vehicle vibration test was carried out on the vehicle vibration test bench for the electric drive axle.The test shows that the overall life and reliability of the electric drive axle meet the design requirements,and the reliability of the analysis method is verified.
Keywords：Commercial vehicleElectric drive axleRoad load spectrumFatigue lifeFatigue analysis
Publication Date：2025-04-14
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 10-18 )