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A. Contadt, Y. Asaff, T. Fiorentin, K. Nunes, "An Analysis of the Influence of Railway Wheels Flats on Rolling Noise Emitted by Freight Trains with GDE Wagons", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 22.5, 2022, doi:10.4203/ccc.1.22.5

Keywords: impact noise, wheel flats, rolling noise.

Abstract

Among the various noise sources existing in a railway system, the one considered dominant varies according to the operational situation, whose analysis encompasses speed, load, rail and rolling stock conditions. Impact noise, on the other hand, is defined as the impulsive sound produced by the excitation of the wheel and rail when there is a discontinuity on these surfaces, such as a defect in a rail wheel. By means of wheel impact monitoring systems, companies evaluate maintenance to ensure the availability of the wheel in transportation. Nevertheless, in some cases the impact value is within the company's criteria, but the noise emitted by the wheel may be outside the limits established by standards, affecting the comfort of the neighbouring population. In view of the established problem, this work aims to verify the influence of defects in railroad wheels on the noise emitted by freight trains. For this, through noise measurements performed on a test train with wheel defects, it was possible to insert the noise from known defects in the passing noise of trains in normal operation. Thus, using the procedures in the rail noise measurement standard ABNT NBR 16425-4, it was identified that the defects do not influence the average noise of trains passing by. However, it was possible to analyse that the noise generated by trains is mainly result of the rolling noise of the passage of the compositions, since the peaks in the passages do not generate an increase in the final noise emitted.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 22.5 An Analysis of the Influence of Railway Wheels Flats on Rolling Noise Emitted by Freight Trains with GDE Wagons A. Contadt¹, Y. Asaff¹, T. Fiorentin¹ and K. Nunes² ¹Joinville Technological Centre, Federal University of Santa Catarina, Brazil ²VALE S.A, Brazil doi:10.4203/ccc.1.22.5 Full Bibliographic Reference for this paper A. Contadt, Y. Asaff, T. Fiorentin, K. Nunes, "An Analysis of the Influence of Railway Wheels Flats on Rolling Noise Emitted by Freight Trains with GDE Wagons", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 22.5, 2022, doi:10.4203/ccc.1.22.5 Keywords: impact noise, wheel flats, rolling noise. Abstract Among the various noise sources existing in a railway system, the one considered dominant varies according to the operational situation, whose analysis encompasses speed, load, rail and rolling stock conditions. Impact noise, on the other hand, is defined as the impulsive sound produced by the excitation of the wheel and rail when there is a discontinuity on these surfaces, such as a defect in a rail wheel. By means of wheel impact monitoring systems, companies evaluate maintenance to ensure the availability of the wheel in transportation. Nevertheless, in some cases the impact value is within the company's criteria, but the noise emitted by the wheel may be outside the limits established by standards, affecting the comfort of the neighbouring population. In view of the established problem, this work aims to verify the influence of defects in railroad wheels on the noise emitted by freight trains. For this, through noise measurements performed on a test train with wheel defects, it was possible to insert the noise from known defects in the passing noise of trains in normal operation. Thus, using the procedures in the rail noise measurement standard ABNT NBR 16425-4, it was identified that the defects do not influence the average noise of trains passing by. However, it was possible to analyse that the noise generated by trains is mainly result of the rolling noise of the passage of the compositions, since the peaks in the passages do not generate an increase in the final noise emitted. download the full-text of this paper (PDF, 6 pages, 267 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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