The rigid-flexible coupled prototype of gear system which containing flexible shaft and flexible box is established by Virtual.Lab Motion

and the non-linear factors are considered.The loads of main parts are calculated by simulating

and it provides theory for predicting the gear system residual life.By contrasting with the node’s acceleration signals of the test

the possibility of doing faults diagnosis and forecast for gear system with virtual prototype is validated

and so these provides new ways for this field.