The Anti-Noise System for Rail Brakes on Hump Yards

The friction between two metal surfaces results in a high frequency noise (squealing) which also occurs during the braking of wagons with rail brakes in the process of shunting at a marshalling yard with a hump. At that point the noise level may exceed 130dB, which is extremely unpleasant for workers and inhabitants. In our research we developed a new composite material which does not change braking properties, is capable of taking extremely high pressure loads, reduces noise and is environmentally friendly. The noise reduction results had been very good and had shown a decrease of the high frequency noise almost completely (by 99%) at its source. With our technology we had also reduced general noise by more than 30dBA.

Authors:

• Brigita Altenbaher

Keywords:

• Composite heavily fluid compound
• hump yard
• noise reduction
• rail brakes.

References:

[1] Burden of disease from environmental noise. Quantification of healthy
life years lost in Europe,"World Health Organization report, 2011.
[2] J. Oertli and P. H├╝bner, "A 2007 Report on the state-of-the-art Noise
Reduction in Rail Freight," International Union of Railways, pp 7.,
2008.
[3] "Directive 2002/49/EC of the European Parliament and of The Council
relating to the assessment and management of environmental noise,"
Official Journal of the European Communities, 2002.
[4] National Institute of Chemistry Slovenia, "Analysis Report forbraking
segments," 2013.
[5] Directive 1999/45/EC of the European Parliament and of The Council
concerning the approximation of the laws, regulations and administrative
provisions of the Member States relating to the classification, packaging
and labelling of dangerous preparation.Official Journal of the European
Communities, 1999.
[6] "Regulation (EC) No 1272/2008 of the European Parliament and of The
Council on classification, labelling and packaging of substances and
mixtures, amending and repealing Directives 67/548/EEC and
1999/45/EC, and amending Regulation (EC) No 1907/2006.Official
Journal of the European Communities,2008.
[7] Candidate List of Substances of Very High Concern for Autorisation,
ECHA European Chemical Agency.
http://echa.europa.eu/web/guest/candidate-list-table.
[8] Percy-Nicolas Weiß. Welcher Weg f├╝hrt zur leiseren Gleisbremse?2.
Internationales symposium Rangiertechnik in M├╝nchen, 2013.
[9] EN ISO 3095: "Railway applications - Acoustics-- Measurement of
noise emitted by railbound vehicles". 2005.
[10] Lärmreduktion direct am Gleis. Güterbahnen. 1/2003 pp 34-37.