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Characteristics Method Analysis of Wind Pressure of Train Running in Tunnel

터널을 주행하는 열차의 풍압에 대한 특성해법 해석

  • Received : 2012.07.06
  • Accepted : 2012.08.22
  • Published : 2012.10.30

Abstract

Pressure waves are generated and propagate in tunnel when train enters a tunnel with high speed. Compression wave due to the entry of train head propagates along the tunnel and is reflected at tunnel exit as expansion wave. While expansion wave due to the entry of train tail propagates along the tunnel and is reflected at tunnel exit as compression wave. These pressure waves are repeatedly propagated and reflected at tunnel entrance and exit. Severe pressure change per second causes ear-discomfort for passengers in cabin and micro pressure wave around tunnel exit. It is necessary to analyze the transient pressure phenomena in tunnel qualitatively and quantitatively, because pressure change rate is considered as one of major design parameters for an optimal tunnel cross sectional area and the repeated fatigue force on car body. In this study, we developed the characteristics method analysis based on fixed mesh system and compared with the results of real train test. The results of simulation agreed with that of experiment.

Acknowledgement

Grant : 철도 건설 경쟁력 확보를 위한 제반 연구, 레일 방식 초고속 철도 핵심 기술 개발

Supported by : 한국철도시설공단

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  2. Analysis for Characteristics Method on Wind Pressure of Trains Crossing in Tunnel vol.16, pp.6, 2013, https://doi.org/10.7782/JKSR.2013.16.6.454
  3. Study of the Air-tightness Requirement Decisions of GTX Trains vol.18, pp.6, 2015, https://doi.org/10.7782/JKSR.2015.18.6.513