QUASI-STATIC STOCHASTIC MODELLING OF TRACK RESPONSE

Abstract

The field test revealed that the vertical rail deflection under various environments has a random character. The quasi-static linear rail response under vertical wheel load P = 1 kN - the rail deflection and the bending moments of the rail with constant spacing discrete supports is presented. The stiffness of fasteners, sleepers and subgrade are included by a set of discrete springs. The linear finite element procedure is applied, using the IDA computer program. The parametric studies are carried out to examine the effect of randomly variable stiffness of supports and modelled reduction in stiffness of some supports. The deterministic response results and random ones are compared.