Within the framework of a project called 'low noise train', the Deutsche Bahn AG (DB AG) is currently expending a good deal of effort in initiating the development of a goods train that radiates significantly lower levels of wayside noise than do conventional goods trains. The present paper is based upon a collection of results of sound level measurements made by the UIC and the DB AG on wayside noise produced by goods wagons. For A-weighted sound-pressure levels, these results indicate that wheel/rail interactions are the dominant sources at speeds around 80 km/h on most types of wagons. Radiated noise levels are strongly influenced by the kind of braking system as well as by the condition of the rail surfaces. Other parameters appear to play a much smaller role in establishing wayside noise levels. Measurements designed to locate sources of radiated noise on dedicated goods trains have recently been carried out in order to increase our understanding of the mechanisms involved and to study the effects of sound-abatement measures on the level of rolling noise. These measurements were made with one- and two-dimensional configurations of microphone arrays. Several results of these studies are given here.
Low noise goods wagons
Geräuscharme Güterwagen
1996
8 Seiten, 8 Bilder, 9 Quellen
Aufsatz (Konferenz)
Englisch
Online Contents | 1996
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Welded underframes for goods wagons
Engineering Index Backfile | 1936
Welded goods wagons in Germany
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Engineering Index Backfile | 1941