Flexible Truck Frame Dynamic Model and Its Parameters Identification

Truck dynamic simulation model including the flexible frame can be a more accurately description of the vehicle handling and ride. In this paper, an assembly characteristic oriented flexible truck frame dynamic simulation model and its parameters equivalent dynamic identification method were presented. Model parameters, including natural frequencies, moment of inertias, torsional stiffness and damping ratio, were identified by the frequency response function. The model was embedded into vehicle dynamic model for handling simulation. The simulation result indicates that flexible frame parameters which obtained by the equivalent dynamic identification method could described the flexible truck frame dynamic characteristic well.