Acoustical Source Modelling for Rolling Stock Vehicles: the Modeller's Point of View

Invited paper

Andrea Bistagnino

Alstom Transport

Wednesday 3 june, 2015, 08:40 - 09:00

0.1 London (90)

In the framework of the European project Acoutrain, a deep study of the validity of current methodologies used for predictions of the exterior noise of rolling stock vehicles has been performed. Although different international standards exist to measure the sound power level of noise sources, this quantity alone is insufficient to allow the creation of reliable noise models. These measurement techniques can be adapted to obtain the data needed for accurate source modelling. In this paper we address the issue of noise source modelling for the case of rolling stock vehicles; we present the mostly widely used techniques used in this sense and compare their results with measurements both at source level and at train level, showing the impact this has on full train noise prediction. Lastly, we discuss the relation between source modelling in general and the experimental characterization of the sources, including an analysis of the consequences this has on current practices in this domain and on standardization of testing techniques.

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