An on-bord device for bolting to the axlebox of a railway vehicle or locomotive to measure rolling noise close to the wheel surface has been developed by the authors (Proc. Instn. Mech. Engrs. Part F, 1994, 208, 23 - 32 and Ingegneria Ferroviaria, 1994, 6, 317 - 332). Even though laboratory calibration and test runs have shown that the measured noise data are consistent, there was no way to prove that they were in accordance with the on-ground measured ones. Italian State Railways (FS) have performed tests with different wheelsets to evaluate the efficiency of several noise-reduction solutions; during these tests it was possible to repeat noise measurements on-board, therefore obtaining a sufficient amount of data to calibrate the device and to analyse in detail the behaviour of such wheelsets. Calculated calibration constants prove that on-board measured data can be used with confidence to estimate noise levels at several distances from the track, thereby reducing the necessity of long and expensive on-ground tests to measure environmental noise pollution.
Calibration of an on-board noise measuring device by simultaneous measurements of trackside noise of three different wheelsets for the ETR500 FS train
Schallabstrahlung am italienischen Schnellzug ETR 500 FS: Kalibrierung der Schallmesseinrichtung am Fahrzeug durch Simultanmessungen am Gleiskörper des Schienenweges bei drei unterschiedlichen Radsätzen
1997
9 Seiten, 9 Bilder, 2 Tabellen, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
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