Virtual testing within acoustic certification of rolling stock: challenges to be met in the future

Regular paper

Estelle Bongini

SNCF, Innovation and Research Department

Wednesday 3 june, 2015, 15:00 - 15:20

0.1 London (90)

For the certification of new or upgraded railway rolling stock in the EU it has to be demonstrated that the vehicle noise emission level complies with the limiting values prescribed in the TSI Noise (Technical Specifications for Interoperability). Today, the conformity assessment procedure is based on tests such as pass-by noise measurements. This procedure is often seen as restrictive considering that several new rolling stocks are widely based on existing designs and minor changes have to be taken into account in terms of noise emission. ACOUTRAIN is a research project within the 7th framework programme co-funded by the European Commission aiming at simplifying and improving the acoustic certification process of new rolling stock, introducing virtual testing as an alternative and/or complementary approach. A new procedure based on virtual testing has therefore been proposed based on the main requirement that both the real and the virtual testing procedure give equivalent results with the same level of reliability. This paper will describe this proposal as well as the limits encountered during the project for its full validation and the challenges that should be met in the future to propose a reliable and validated virtual testing procedure.

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