In this study sound radiation predictions of a vibrating rail are analyzed. The predictions are calculated using the multipole approach. Elementary three dimensional rail vibration is assumed as input. The three dimensional sound radiation of the vibrating rail can be calculated by approximating the normal velocity on the surface of the rail with the velocity produced by multipole sources within the rail. Their amplitudes are gained by minimizing the surface error by method of least squares. The sound radiation is then the superposition of the pressures generated by all such multipole sources. A theoretical derivation of the cylindrical multipole approach, as well as the results of the simulations, are demonstrated.
A closer look at the three dimensional multipole approach for rail sections
Eine Tiefenprüfung des dreidimensionalen Multipolverfahrens für Schienenprofile
International Congress on Sound and Vibration, 7 ; 2663-2670
2000
8 Seiten, 8 Bilder, 6 Quellen
Aufsatz (Konferenz)
Englisch
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