• Title, Summary, Keyword: Train speed up

Search Result 329, Processing Time 0.04 seconds

The Study for Speed-up of Main Line by High Speed Train (기존선의 고속전철 연계운용으로 고속화 방안)

  • 박광복
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.105-113
    • /
    • 2001
  • This report was studied about speed-up for main line of KNR(Korea National Railroad) by High Speed Train. The maximum speed of Kyun-Pu line was recorded a 140km/h by Saemaul train in 1985 and the average speed its is a 107km/h now. For operation KTX Kyun-Pu High Speed Train and G7 Korea High Speed Train in KNR line, this report was studied about operation status of High Speed Train in advanced countries, operation situation of train in KNR line and plan of speed-up for main line.

  • PDF

Experimental Study for the Speed-up of a Super-speed Train Model in the Partial Vacuum Tunnel (아진공 터널에서 초고속 열차의 속도향상에 관한 실험적 연구)

  • Kim, Dong-Hyeon;Kim, Jae-Heung
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.2064-2071
    • /
    • 2011
  • We are developing an innovative super-speed land transportation system running in a partial vacuum in tunnels with small inside diameter to reduce the aerodynamic drag forces. This paper presents the experimental results obtained on a small scale model when a super-speed train model passing through a tunnel with small inside diameter and a partial vacuum to reduce the aerodynamic drag forces. The experiments were performed on a 1/52-scale moving model rig in which a train model with a diameter of 58 mm and a length of 603 mm was accelerated in a launching tube with 12.27 m length by means of the compressed air launcher and then passed through a tunnel model with 17.149 m length. The partial vacuum was maintained in the tunnel in order to reduce the energy consumption of the propulsion system of the super-speed tube train at super-speed of 700 km/h. In this study, the blockage ratio of train to tunnel model is 0.336. Experimental results show the nonlinear effects of the vacuum on the speed-up of the train model in the tunnel model under the partial vacuum up to 0.21 atm and at the velocity up to 684 km/h. This paper is first study for experiments on the speed-up of a super-speed train model in the partial vacuum tunnels.

  • PDF

Field Measurements to Predict the Wind Gust under Train at the Speed-up of Conventional Railway Lines (기존선 고속화 시 열차 하부 열차풍 예측을 위한 현장 측정 시험)

  • Kwon, Hyeok-Bin;Nam, Seong-Won;Ko, Tae-Hwan;Jeon, Byung-Kill;Kim, Man-Cheol
    • Journal of the Korean Society for Railway
    • /
    • v.13 no.4
    • /
    • pp.376-381
    • /
    • 2010
  • In this study, field measurements on KTX, Nuriro and TTX train have been conducted at Kyeongbu and Honam line to predict the wind gust under train at the speed-up of major conventional railway lines using Kiel-probe array and multi-channel pressure scanning system. The results show that the average wind velocity during train passage normalized by train speed is independent to train speed, thus the wind gust for a given train type at the speed-up condition could be predicted. The relationship between the shape of underbody and the characteristics of the underbody wind gust has been discussed.

Development of TTX(Tilting Train Express)for speed-up the existing main line (한국형 기존선 고속화 틸팅열차 연구개발사업)

  • Song Dal-ho;Choe Kangyoun;Han Seong-ho
    • Proceedings of the Korean Society For Composite Materials Conference
    • /
    • /
    • pp.3-5
    • /
    • 2004
  • In order to speed up basic concept is to enhance high speed, curve limit speed, cross limit speed, acceleration/deceleration speed. It is important to optimal interface fundamental technology of vehicle, rail, electrical power, and signal system. Tilting train has advantage minimizing investment cost of infra railway system for increasing train limit speed in curve. the developed tilting train should be operated to commercial service speed 180Km/h of 200Km/h at KNR upgrade railroad. This paper proposed the basic model of system engineering for developing of TTX, tilting EMU (maximum operation speed : 180km/h) with speed-up of conventional railway system.

  • PDF

A Study on Pressure Variation of the Passenger Cabin of Conventional Train for Speed-up (기존선 속도향상을 위한 객실내 압력변동에 관한 연구)

  • 남성원;한기흥
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.521-526
    • /
    • 2000
  • Experimental study is conducted to clarify pressure variation of the passenger cabin of conventional train. These pressure variation may give rise to the ear-discomfort. Generally ear-discomfort has been considered as a problem related to high speed train. Because there is also a good progress to speed-up for conventional line, this isn't only a phenomena related to high speed train any longer. In this study, tile pressure variation of interior, gangway and exterior of saemaeul passenger car is measured using the atmospheric pressure sensors in Honam line. From the results of experiment, the pressure variation per second almost close in upon the limitation in the case of Noryong tunnel. Therefore, to accomplish speed-up for conventional train, it may be necessary to study a serial ventilating and the airtightness of carbody.

  • PDF

A Experimental Study on Train Speed and Wave Propagation Speed of Contact Wire according to the Speed-up (속도향상에 따른 열차속도와 전차선 파동전파속도에 대한 실험적 연구)

  • Lee, Kiwon
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.62 no.12
    • /
    • pp.1820-1823
    • /
    • 2013
  • An overhead catenary system is the one of the main subjects for increasing speed in electric railway. When a vehicle increases the speed over 350km/h, vibrations and wave propagation reflections occur severely. Therefore, the system suitable for the speed are needed. A wave propagation speed of contact wire is the main criteria to determine the tension for the system. Therefore, a train speed is restricted below 70% of wave propagation speed of it in European railway code. In this study, we measured a strain and uplift of contact wire while HEMU-430X tain is operated for the speed-up trial test in Kyungbu high-speed railway. The measured strain and uplift are analyzed with wave propagation speed according to the speed-up. The more a train speed reaches to a propagation speed, the more measured strain is high. Through the study, an experimental approach is performed about the code which a train speed is restricted below 70% of wave propagation speed of it.

Target and Implementation of Aerodynamic Drag Reduction for High-speed Train to Reach Up to 500km/h Running Speed (주행속도 시속 500km 달성을 위한 고속철도 차량의 공기저항 저감 목표 및 달성 방안)

  • Kwon, Hyeok-Bin;Yun, Su-Hwan;Lee, Hyung-Woo
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.1320-1326
    • /
    • 2011
  • The maximum speed of high-speed rail is restricted to various factors such as track condition including slope and radius, tunnel and dynamic stability of vehicle. Among the various factors, traction effort and resistance to motion is principal and basic factor. In addition, at high speed over 300km/h, aerodynamic drag amounts up to 80% of resistance to motion, that it can be said that aerodynamic drag is the most important factor to decide the maximum speed of high-speed rail system. This paper deals with a measure to increase the maximum speed of high-speed train by reducing aerodynamic drag. The traction effort curve and resistance to motion curve of existing high-speed train under development has been employed to set up the target of aerodynamic drag reduction to reach up to 500km/h without modification traction system. In addition, the contribution of various sources of aerodynamic drag to total value has been analyzed and the strategy for implementation of aerodynamic drag reduction has been discussed based on the aerodynamic simulation results around the train using computational fluid dynamics.

  • PDF

Introduction of development speed-up project to existing main line (기존선 속도향상 실용기술개발 사업소개)

  • Koo Dong-hae;Han Seong-ho
    • Proceedings of the Korean Society For Composite Materials Conference
    • /
    • /
    • pp.26-29
    • /
    • 2004
  • In order to speed up basic concept is to enhance high speed, curve limit speed, cross limit speed, acceleration/deceleration speed. It is important to optimal interface fundamental technology of vehicle, rail, electrical power, and signal system. Tilting train has advantage minimizing investment cost of infra railway system for increasing train limit speed in curve. the developed tilting train should be operated to commercial service speed 180Km/h of 200Km/h at KNR upgrade railroad. This paper proposed the basic model of system engineering for developing of tilting EMU (maximum operation speed : 180km/h) with speed-up of conventional railway system.

  • PDF

Design of Basic model of system engineering for developing Tilting Train (틸팅차량개발 시스템엔지니어링체계 기본모델연구)

  • Han, Seong-Ho;Lee, Su-Gil;Shin, Gwang-Bok;You, Won-Hee;Kim, Gin-Hun
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.350-352
    • /
    • 2002
  • In order to speed up basic concept is to enhance high speed, curve limit speed, cross limit speed, acceleration/deceleration speed. It is important to optimal interface, fundamental technology of vehicle, rail, electrical power, and signal system. Tilting train has advantage minimizing investment cost of infra railway system for increasing train limit speed in curve. the developed tilting train should be operated to commercial service speed 180km/h of 200km/h at KNR upgrade railroad. This paper proposed the basic model of system engineering for developing of tilting EMU(maximum operation speed : 180km/h) with speed-up of conventional railway system.

  • PDF

Experimental Study on Ride Comfort of a Push-Pull Seamaeul Train in Case of Speed-up (전후동력 새마을호 열차의 속도향상 시 승차감에 관한 실험적 연구)

  • 구병춘;신종한;김남포;최성규
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.250-257
    • /
    • 2000
  • The speed-up of conventional trains is considered as one of the efficient methods to relieve traffic jam and to increase the capacity of transportation. In this study, we measured and analyzed the ride comfort of a push-pull Saemaeul Train with speed-up of 5km/h in curves and 10km/h on straight tracks as compared with present operation speed of the push-pull Saemaeul Trains. Four main lines-Honam, Kyungboo, Janghang, Kyungjeon- were chosen as representative lines for speed-up feasibility study. The increase of mean ride comfort index in case of speed-up is 0.5-2㏈. The mean ride comfort index of vertical direction in case of speed-up is 107-110㏈ for Honam line, 104-112㏈ for Kyungboo line, 108-112㏈ for Janghang line and 105-108㏈ for Kyungjeon line, which are rather high as compared with German trains of similar grade with maximum vehicle speed of 160km/h.

  • PDF