A generic railway noise source model is now available, capable of covering many situations with characteristic noise sources. Noise control measures such as roughness control and quieter wheel or track designs can now be better taken into account. In contrast to existing national calculation schemes, the source model is less specific to national rolling stock and tracks, and is based more on a physical description or direct measurement data for each source type. The IMAGINE (Improved Methods for the Assessment of the Generic Impact of Noise in the Environment) railway traffic noise source model is described, which is a further elaboration and completion of the Harmonoise model. Within the EU project Harmonoise, a model was proposed including most of the main railway noise sources. In the IMAGINE project, complete formulation was put forward taking all relevant physical sources but also main operating conditions into account, and default source data was proposed. At a given section of track with a given traffic flow, for each type of rolling stock, a combination of operating conditions and physical sources may occur. The operating conditions are constant speed, acceleration, braking, curving and stationary operation. The physical sources are rolling noise, impact noise, traction noise, curve squeal in points or curves, broadband or tonal braking noise and aerodynamic noise. The IMAGINE models for each physical source are presented and their relevance for each operating condition is discussed. Some examples of default input data are given and measurement methods to obtain source data are outlined.
The IMAGINE source model for railway noise prediction
Das IMAGINE-Quellenmodell zur Vorhersage von Eisenbahnlärm
Acta Acustica united with Acustica ; 93 , 2 ; 185-200
2007
16 Seiten, 19 Bilder, 3 Tabellen, 17 Quellen
Article (Journal)
English
The Harmonoise-IMAGINE model for traction noise of powered railway vehicles
Online Contents | 2006
|IMAGINE Rail Noise Sources – A Practical Methodology
Springer Verlag | 2008
|IMAGINE Rail Noise Sources - A Practical Methodology
British Library Conference Proceedings | 2008
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