Tractor-semitrailer dynamics simulation model is established by force analysis including tractor lateral and longitudinal movement, tractor-semitrailer yaw movement, tractor unsprung mass roll movement, tractor front axle and rear axle unsprung mass roll motion, semi-trailer sprung and unsprung mass roll motion and thinking of lateral load transform of different axles. This dynamics model is Passing ability of articulated vehicles is analyzed, which are combined of different 6×4 tractors and different semi-trailers. According to the requirements of GB 1589-2004 ‘Limits of dimensions, axle load and masses for road vehicles’, passing ability of different structure articulated vehicles are simulated by using AutoTURN software. Tractor front overhang, distance between center of tractor fifth wheel and tractor first axle, semitrailer first wheel space is selected as the main factors of articulated vehicle passing ability, in order to analyzing passing ability impact factor of articulated vehicles type and structure. Simulation analysis is used to study how tractor front overhang, distance between center of tractor fifth wheel and tractor first axle, and semitrailer first wheel space impact passing ability. Some reasonable suggestions is proposed by analysis how parameters change impact passing ability. The validity of the simulation model is validated by the test data of ‘3rd Swap Trailer Transport Recommended Vehicles Test’. The results provide a useful reference for improving articulated vehicle passing ability level and promote the development of vehicle industry technology.

CICTP