2015
DOI: 10.9711/ktaj.2015.17.3.319
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A comparative study of field measurements of the pressure wave with analytical aerodynamic model for the high speed train in tunnels

Abstract: ABSTRACT:The pressure wave formed by the piston effects of the train proceeds within the tunnel when a train enters the tunnel with a high speed. Depending on the condition of tunnel exit, the compression waves reflect at a open end, change to the expansion waves, transfer to tunnel entrance back. Due to interference in the pressure waves and running train, passengers experience severe pressure fluctuations. And these pressure waves result in energy loss, noise, vibration, as well as in the passengers' ears. I… Show more

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“…When a train enters in and out of a tunnel at a high speed, the boundary of flow field will change suddenly. When train head and train tail enter in and out of a tunnel, compression and expansion waves will be produced and reflect in reverse at the tunnel entrance and exit, which causes very complex waves in the tunnel [1][2][3][4][5][6], forms drastic pressure fluctuations and has a serious influence on the fatigue failure of fixed equipment in the tunnel, train body and components and the comfort of passengers. For instance, it will lead to the excessive deformation of compartments, produce explosive noise or break window glass.…”
Section: Introductionmentioning
confidence: 99%
“…When a train enters in and out of a tunnel at a high speed, the boundary of flow field will change suddenly. When train head and train tail enter in and out of a tunnel, compression and expansion waves will be produced and reflect in reverse at the tunnel entrance and exit, which causes very complex waves in the tunnel [1][2][3][4][5][6], forms drastic pressure fluctuations and has a serious influence on the fatigue failure of fixed equipment in the tunnel, train body and components and the comfort of passengers. For instance, it will lead to the excessive deformation of compartments, produce explosive noise or break window glass.…”
Section: Introductionmentioning
confidence: 99%