Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Theoretical Study on the Characteristics of Pressure Change of High Speed Train in Tunnels

터널통과시 고속 철도 압력 변동 특성에 관한 이론적 연구

  • 남성원 (한국철도기술연구원 공기유동연구그룹) ;
  • 권혁빈 (한국철도기술연구원 공기유동연구그룹)
  • Published : 2004.09.01
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Abstract

Theoretical study has been conducted to clarify pressure characteristics of KTX(Korea Train eXpress) in tunnel. The severe pressure change in tunnel may give rise to the ear-discomfort for passenger and fatigue for car body. The external and internal pressure of rolling stock have been measured by using the running test with atmospheric pressure sensors and portable data acquisition system in high speed train. In this study, the tunnels from 200m to 4000m in length have been chosen for the investigation of tunnel length effects. We found that there are similar patterns of external pressure change for each critical tunnel length. The critical tunnel lengths are governed by train speed, train length and sonic velocity. And, the patterns of pressure wave in tunnel are classified into eight groups.

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References

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