Fatigue Durability Analysis of Commercial Vehicle Cab Based on Finite Element Method and Multi-Body Dynamics
In order to improve the relevance between commercial vehicle cab fatigue simulation and its durability test on proving ground,a(6×4)tractor cab was taken as the research object,and a fatigue durability analysis method combining measured road spectrum and virtual simulation was proposed.The finite element model of the full interior cab was established in Hypermesh,and the unit load stress of the cab was obtained by inertial release.Cab-frame rigid-flexible coupling multi-body dynamics model was established in Adams/car software.Taking the measured cab airbag suspension displacement and acceleration signals on proving ground as target response signals.Based on the principle of cyclic iteration,the fatigue load spectrum of cab was ob-tained by virtual iteration in FEMFAT-Lab.Based on the Miner linear fatigue cumulative damage theory,the fatigue simula-tion analysis was carried out in the nCode software.The analysis results show that the fatigue damage parts such as deflector brackets are basically consistent with durability test results on proving ground.The proposed fatigue analysis method has impor-tant reference value to the fatigue durability analysis of the automobile system.
NETL
NSTL
万方数据
维普
