Abstract：The mesoscopic model of ATB-30 was established based on particle flow code. The stress characteristics of ATB-30 under vehicle load were simulated during construction. The evolution of contact force and the displacement of particles at different position of ATB-30 particles were tracked. The particle contact forces of ATB-30 and AC-20 were compared. The results show that the contact forces among particles are different with various extension direction. The large force forms among large particles, and the maximum force is 7.051×104 N before loading with 1.393×105 N after loading. The distribution of force under tires is more intensive with large value. The particle displacement is decreased along the depth direction, and the displacements at two wheel gaps are smaller than those at the middle of wheels. The maximum difference of displacement at the middle of left and right wheels occurs at depth of 0.04 cm with difference of only 0.28 mm.
2016, Vol. 37 
