Prediction of Rolling Noise Due to Wheel/Rail Interaction
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Date
2015-03
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Addis Ababa University
Abstract
Noise, 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.
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Keywords
wheel/rail interaction, contact pressure, rolling noise