RAIL DAMPER PARAMETERS' EFFECT ON THE FREQUENCY RESPONSE FUNCTION OF THE RAIL

Dorina FOLOGEA, Traian MAZILU, Ioana-Isabela APOSTOL

Abstract


The paper presents the influence of the viscoelastic features of a rail damper upon the frequency response function of the rail in terms of receptance. To this aim, a simplified model of the rail is used consisting of single-track span: rail and half support at each end of the rail, including rail pad, sleeper and ballast. The rail model is a free-free Timoshenko beam, the rail pad and ballast are modelled by a Kelvin-Voigt system for each, and the sleeper is modelled as a rigid body in vertical translation. Rail receptance is calculated with the help of the frequency-domain Green's function. Effect of the eigenfrequencies of the rail damper as well as the distance between the sleepers on the rail receptance is outlined and analyzed.

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References


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