Calculation of the dynamic responses of a railway track on a non-uniform foundation

The dynamic response of a railway track has been investigated by analytical or numerical models. When rail supports (sleepers) foundation contain defects, the damage reduces stiffness and becomes non-uniform. This paper presents new model to calculate responses on non-uniform foundation. In this model, is considered as an infinite beam resting equidistant subjected moving forces. sleepers are stable provided that there sufficiently large distance between applied forces defective area. By combining condition equation beam, we can deduce relation reaction in displacement beam. does not depend behaviors. Hence, using constitutive laws supports. be obtained finally with direct iterative techniques. examples show zone causes increase at overloads neighbor