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Noise Contribution Analysis of Pantograph Using Real Train Experiment
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 Title & Authors
Noise Contribution Analysis of Pantograph Using Real Train Experiment
Oh, Hyuck Keun; Noh, Hee-Min; Kim, Jun-Kon; Park, Choonsoo;
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 Abstract
Pantograph aerodynamic noise is a major cause of noise that occurs when a train is traveling at high speeds. In this study, in order to analyze the contribution of pantograph aerodynamic noise, real train tests using HEMU-430X were carried out. In order to analyze the frequency characteristic of the noise of the pantograph in an actual vehicle, a sound field visualization has been carried out using a 144-channel microphone array at train speeds of 350 and 400km/h. As a result, it was confirmed that the low frequency noise in the 250~400Hz bandwidth provides the main contribution to the pantograph noise. And, in order to estimate the noise contribution of the pantograph, the noise level difference between cases in which the pantograph is ascending and those in which it is descending were compared in single microphone experiments. The frequency analysis in the single microphone tests showed that the bands of 315~400Hz and 1000~1250Hz are the main frequency characteristics of pantograph noise. These results show quite good agreement with those of previous studies and with results of sound field visualization.
 Keywords
Microphone array;Pantograph;Beam-forming method;High speed train;Sound field visualization;
 Language
Korean
 Cited by
 References
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