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고속철도구간 방음벽 제진재 시험제작 및 성능평가에 관한 연구
김순철(Kim Soon-Cheol),강정옥(Kang Jeong-Ok),한광섭(Han Kwang-Seob),전병찬(Jeon Byung-Chan),한종문(Han Jong-Moon) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
The commercial service of KTX from April 1st 2004 has realized that whole country has shrunk into half-day life zone and it opened the times of speed. However, some technical problems unexpected before service have been raised and, among them, the noise generation at train passing was claimed by the residents living nearby the track and it is often publicized by the broadcastings and newspapers. In case where the residential area is close to the track, the installation of noise barrier at trackside is the general measures for noise reduction on bridge section and earthwork section. In case of KTX project, such measures were actually taken without any exception; however, the noise level is still high. In this study, analysis for the reason of higher noise level in spite of which the noise barriers are being installed was carried out, the sample of insulation material effective for noise barrier was manufactured and the performance of the insulation material was evaluated to verify its effectiveness.
김순철(Kim Soon-Cheol),김영구(Kim Young-Gu),전병찬(Jeon Byung-Chan),한종문(Han Jong-Moon) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
The extent of slack is correlative with the wheelbase of vehicle as well as the distance between the inner faces of flanges. Since the movable clearance of wheel flange is getting reduced in curved track, the vehicle is more difficult to negotiate the track. By this reason, a certain extent of slack is normally designed for curved track to allow the movable clearance corresponding to that of straight track. In case of some foreign railways, the fixed extent of slack has been classified by the ranges of curve radius. In case of KNR, the slack is calculated by a formula for each case of curve radius and it therefore seems quite precise method. However, since there is a wide range of slack adjustment(S"=0~15㎜) in calculation formula itself, too excessive or too little slack can be calculated. This study is to approach the technical review on slack calculation and to offer the reasonable slack design through the full-scale experiment at sharp curved track without slack.