Numerical modeling techniques for noise emission of free railway wheels

Linus Taenzer, Urs Pachale, Bart Van Damme, Andrea Bergamini, Domenico Tallarico

Railway Engineering Science ›› 2024, Vol. 32 ›› Issue (2) : 144-161. DOI: 10.1007/s40534-023-00327-z

Numerical modeling techniques for noise emission of free railway wheels

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Abstract

In this article, we consider the numerical prediction of the noise emission from a wheelset in laboratory conditions. We focus on the fluid–structure interaction leading to sound emission in the fluid domain by analyzing three different methods to account for acoustic sources. These are a discretized baffled piston using the discrete calculation method (DCM), a closed cylindrical volume using the boundary element method (BEM) and radiating elastic disks in a cubic enclosure solved with the finite element method (FEM). We provide the validation of the baffled piston and the BEM using measurements of the noise emission of a railway wheel by considering ground reflections in the numerical models. Selected space-resolved waveforms are compared with experimental results as well as with a fluid–structure interaction finite element model. The computational advantage of a discretized disk mounted on a baffle and BEM compared to FEM is highlighted, and the baffled pistons limitations caused by a lack of edge radiation effects are investigated.

Keywords

Discretized baffled piston / Finite element / Boundary element / Railway noise / Acoustic emission / Vibrations

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Linus Taenzer, Urs Pachale, Bart Van Damme, Andrea Bergamini, Domenico Tallarico. Numerical modeling techniques for noise emission of free railway wheels. Railway Engineering Science, 2024, 32(2): 144‒161 https://doi.org/10.1007/s40534-023-00327-z

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Funding
Bundesamt für Umwelt(1337000438)

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