Mechanical Characteristics of Ballast Bed under Dynamic Stabilization Operation Based on Discrete Element and Experimental Approaches

To study the mechanical characteristics of ballasted bed under dynamic stability, a three-dimensional discrete element model with 1000 mm × 700 550 is established based on method. Meanwhile, simulation test bench same size built for analysis and experimental research. The variation law trend settlement, lateral resistance, compactness different excitation frequencies are analyzed comprehensively. results show that when frequency constant, resistance sleeper, settlement track sleeper increase first then tend to be stable. With in horizontal frequency, ballast bed, decrease after stable operation. values these parameters maximized 36 Hz which relative optimal this model.