A Dynamic Modeling of Vertical Rail Deflection in Concrete Slab Track for High Speed Trains

초록

Most of developed and many developing countries in the world are preparing to update their existing lines as well as to create new high speed railway routes. Such high speeds make the response of railway track become dynamic. In this paper, a finite element modeling is attempted to simulate time domain dynamic behavior of the two-dimensional slab track system. A vehicle wheel is simply modeled as a sprung mass with two reference points in which the wheel weight is applied at one end and the equivalent vehicle weight is assigned to the other end. The contact between a reference point and the rail is nonlinearly simulated. The numerically predicted vertical rail displacements show a remarkable influence of train velocity on the concrete track system.