The effects of noise reduction by the change of penhead shape in pantograph

판토그래프 펜헤드 형상 변화에 따른 소음저감효과 분석

  • 한재현 (홍익대학교 대학원 기계공학과) ;
  • 김태민 (홍익대학교 대학원 기계공학과) ;
  • 김정태 (홍익대학교 기계시스템디자인공학과)
  • Published : 2012.10.27

Abstract

Nowadays, high speed train has settled down as a fast and convenient environment-friendly transportation and it's need is gradually increasing. However increased train speed leads to increased aerodynamic noise, which causes critically affects comfortability of passengers. Especially, the pantograph of high speed train is protruded out of train body, which is the main factor for increased aerodynamic noise. In this research, to reduce aerodynamic noise pantograph, panhead's shape changed to aerodynamical shape. aerodynamic noise of pantograph is predicted by CFD (Computational Fluid Dynamic) and FW-H (Ffowcs Williams-Hawkings) equation. Also, the sound pressure level of aerodynamic noise of base and modified models are predicted. And the reduction effects of the sound pressure level is analyzed.

Acknowledgement

Supported by : 국토해양부