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Noise Contribution Analysis of Pantograph Using Real Train Experiment

실차시험을 이용한 팬터그래프의 소음기여도 분석

  • Received : 2016.01.13
  • Accepted : 2016.05.24
  • Published : 2016.06.30

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.

Acknowledgement

Grant : 고속열차 성능 및 효율 향상 핵심기술 개발, 고속열차용 저소음/저저항 팬터그래프 공력설계 기술 및 풀 스케일 팬터그래프 형상 개발

Supported by : 국토교통부

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