Rail corrugation is a wave type wear of therail surface with a wide variety of wavelengths. Corrugation shows as an undulation of the rail surfacewith typical wavelengths between 25 and 80mm. Rail corrugation is one of themost serious and expensive problems experienced by transit systems, railcorrugation is a frequently occurring rail wear pattern that arises mostly incurves, the corrugation phenomena is considered forvehicles with low axle load, running at low speed in curves with small radius.

Rail corrugation is caused everywhere due tothe combination of various factors, rail corrugation could be caused by someresonances as:

1. The torsionalvibration of the wheel-set in curve.

2. Excessively largecreepage between wheel and rail, which could be caused by insufficiency ofrolling radius difference between high-rail side wheels or caused by large ofattack between rail and wheel.

3. Oscillation of wheelload, which could be caused by vertical vibration including contact stiffnessor rail rolling vibration.

4. Stick-slip betweenthe rail and wheel when accompanying with the oscillation of the wheel load, itwas found that the stick-slip is caused mainly by the vibration of wheel load.

   The aim of the project is to analyze the finiteelement of twin disc rig test and find out effective solutions to reduce or getrid of the corrugation problem on rail.

   Theobjectives of analyzing the twin disc rig test are:

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