Tollossa, Deberie (Mr.)Hassen, Mohammed2019-01-022023-11-042019-01-022023-11-042015-03http://etd.aau.edu.et/handle/123456789/15459Noise, caused by the interaction of steel wheel rolling on the steel rail is always present. The noise radiated by the railway system has significant influences on both passengers inside the trains and the residents along the railway lines. To overcome this problem, first we have to predict the noise level by applying and varying different parameters, like wheel load, materials of the wheel and rail, operating speed and so on. But in this paper i mainly consider only train operating speed to predict the noise generated between the contacting surfaces which is obtained from the contact pressure. The objective of this research is to predict the noise generated between wheel/rail by applying different operating speed. The maximum contact pressure during the operation of the train is used to predict the noise level. This research is done by developing the 3D model using CATIA V5 R16, simulation using ANSYS v14.5 and analytical calculation. In this research, the value of average maximum contact pressure obtained by simulation of ANSYS software on the whole area of ellipse (contact patch) is 511.7 . This is due to the operating speed 80km/h and the minimum contact pressure on the whole area of ellipse is 351.68 Mpa when the operating speed is 60km/h, the corresponding sound pressures are 268.15 dB and 264.9 dB respectively. From the results, high speed is the cause of high contact pressure and this high contact pressure is the cause of high noise.en-USwheel/rail interactioncontact pressurerolling noiseThesis