Determination of the modulus of elasticity of railway track with BF70 sleepers

Abstract

The purpose of this work is to determine the modulus of elasticity of the under-rail base, which are the main elastic characteristics that determine the stresses in the elements of the track structure under the dynamic load from the train. Traditionally, the modulus of elasticity of the track is determined on the basis of experimental studies. In this paper, the modulus of elasticity of the under-rail base is determined by calculation. For this purpose, a finite element model of the railway track was created in the Femap with NX Nastran software package, and the deflections of the rails from different forces transmitted from the wheel were determined by means of modelling. Values of the elastic modulus of the sub-rail base for the track with BF70 sleepers were obtained. The results make it possible to carry out a set of calculations of the railway track with BF70 sleepers for strength and stability.