CRH5动车组关键动力学研究-车辆工程专毕业论文.docx

ABSTRACT ， The core technique of high．speed vehicle through few decade apply and modification，speed of vehicle today exceed to yesterday,the dynamic performance of train system not only affects the increase of speed，but also the ride comfort and running safety．Not only ensure vehicle don’t overturn and jump the track，but also ensure hi29h speed vehicle have good ride comfort，high speed vehicle have some problem in practice running．Today computer developed great impel vehicle dynamics simulation， finite element analysis，modal analysis and track analysis and SO on．Those make design step in rational era．High speed bogie suspension research，dynamics envelope research， suspension stay bearing research，dynamics performance analysis，wheeltrack research， driving motion and brake system study make high speed design have enrichment academic base． High speed compare with low speed vehicle need even more study．Due to incomplete mathematical model of multi—rigid body and multi·flexible body,dynamic behaviors caused by nonlinear factor in system have not been understood absolutely．It cannot satisfy modern industrial design．Multi dimensional system theory is complex and reality system exist miscellaneous nonlinear factor，analysis have difficulty,SO solve those must break down complex system to simple system，then we carl have method open out nonlinear factor in system． The main research work involves： Firstly,this paper considers mechanics of vehicle dynamics in theoretically． Overviewed all OVer the world research about high-speed vehicle present state and perspective． 2． Aim at high speed vehicle suspension system，theory analysis make dynamics simulation have academic base． 3．Suspensions stay bearing research，analysis vehicle suspension set for validated the structure． 4．Wheel track research：different tread contact geometrical features analysis，dynamics analysis of contact area 5．Set up drive and brake system academic modal and simulation reality work condition． Second the pap