抄録
This paper describes a finite element vibration analysis of crushed stone aggregate used in the ballasted track to examine the frequency characteristic up to the high frequency area of about 1 kHz. In the modeling, we tightened the crushed stones expressed as a polyhedron model using the three dimensional discrete element method, and built a finite element model from the numerical arrangement and contact data of the crushed stone. Inputting a train load to this model, we simulate the behavior and the stress distribution of crushed stone aggregate under a train passing. Numerical results were compared with measurement results to confirm the reproducibility of this model. Finally, we also clarify characteristics of the vibration and the wave propagation of crushed stone aggregate by the vibration analysis using this model.
