The dynamics simulation model of positive-freestanding and spilt-path mechanical transmission has been built by muti-body dynamics simulation software ADAMS.It included the straightaway

turning and center turning model.The loading torque is obtained form the steer simulation experiment and the imput torque is formed by the outer-characteristic curve of engine in dynamics simulation.Thus

the load spectrum of important part can be obtained and used as theoretical base of its dynamics optimize design and residual life forecast.