Analysis of Interior Noise for KTX in Tunnel with Concrete Track

콘크리트 궤도 터널 내 KTX 차량의 실내소음 특성 분석

  • 김재철 (한국철도기술연구원, 차량기계연구본부) ;
  • 이찬우 (한국철도기술연구원, 차량기계연구본부)
  • Published : 2005.11.17

Abstract

The interior noise of KTX in tunnel is becoming the problem since the commercial operating in April 2004. The major sources of interior noise for High speed train ate known as the aerodynamic noise and rolling noise generally. We measure the noise and vibration inside KTX in tunnel in order to find the cause of the interior noise of KTX. The analysis results show that the interior noise of KTX in tunnel with concrete track is increased sharply by a low frequency below 80Hz that is the natural frequency of the KTX carbody. We know that the booming noise inside KTX in tunnel with concrete track is generated by aerodynamic noise outside ganqway and rolling noise at the carbody natural frequency.