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Study of the Air-tightness Requirement Decisions of GTX Trains
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 Title & Authors
Study of the Air-tightness Requirement Decisions of GTX Trains
Yun, Su-hwan; Cho, Yong-hyeon; Hong, Seok-woo;
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 Abstract
When a GTX travels through a deep-level underground tunnel at a speed of 180km/h, ear-discomfort in passengers due to the pressure wave generated could be an issue due to the small cross-sectional area. Therefore, appropriate pressure-tightness values for GTX trains must be secured as a countermeasure. In this paper, a 1D numerical analysis was conducted to determine the pressure-tightness coefficient which allows a pressure change meet the criteria. The pressure transients in a tunnel and in a passenger car are predicted considering an A-line underground tunnel with a length of 37km and its operation schedule. The required pressure-tightness of the car is predicted to be three seconds and 6 seconds respectively for a single track and a double- track tunnel to prevent aural discomfort in passengers. The result of this study are expected to serve as useful information to those involved in the development of various solutions to improve air-tightness of GTX passenger cars.
 Keywords
GTX;Pressure-tightness;Aural discomfort;Pressure change;
 Language
Korean
 Cited by
 References
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