Abstract: The dynamic response of the suspension system for high-speed tracked vehicle across obstacle was studied in this paper. Applying the theory of multibody dynamics to the suspension system, the dynamic model of the system was established and the planar motion equations were set up. The track loop contribution to the e- quations was carefully considered. Physically, it can be equivalent to the forces composed of inertial force and tension of the track loop acting on the chassis and roadwheels. Simulation program was developed using the tool of Matlab/SimuLink. It is proved that the simulation model and analysis method are acceptable from the comparison of the simulation results with on-site test results, which can be used for the suspension system design and dynamic analysis of the armored vehicle.

Key words: solid mechanics , tracked vehicle , suspension system , dynamics , simulation