Numerical modeling techniques for noise emission of free railway wheels

Autor: Linus Taenzer, Urs Pachale, Bart Van Damme, Andrea Bergamini, Domenico Tallarico
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Railway Engineering Science, Vol 32, Iss 2, Pp 144-161 (2024)
Druh dokumentu: article
ISSN: 2662-4745
2662-4753
DOI: 10.1007/s40534-023-00327-z
Popis: 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.
Databáze: Directory of Open Access Journals
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