Subjective experiment's result shows that,among other f actors,vehicle-braking condition affects the ride comfort most.Based on the fa ct,this paper brings forward the seven-degree-of- freedom “braking-vibrati on” automotive model considering the road effect,then establishes the simulati on model of the mathematic model with Simulunk simulation software.At last,a sim ulation analysis of the effect to the ride comfort under different braking force s and different road surfaces is carried out,and the outcome ...