• Title, Summary, Keyword: High-speed EMU

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Vibration reduction of the high-speed EMU for improvement of ride comfort (승차감 향상을 위한 동력분산형 고속전철의 진동저감)

  • Baek, Seung-Guk;Lee, Rae-Min;Shin, Bum-Sik;Lee, Sang-Won;Koo, Ja-Choon;Choi, Yeon-Sun
    • Proceedings of the KSR Conference
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    • pp.1435-1440
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    • 2008
  • High-speed train under development is a type of EMU(electric multiple units). Since power sources like motors and gears are distributed in the high-speed EMU, the high-speed EMU generates vibration and sound more than the articulated high-speed train. Vibration of vehicle, vibration between rails and wheels, hunting of bogie and snake motion reduce ride comfort. In this paper, to decrease the vibration of the articulated high-speed train, improvements were presented using an analytical model and a simulation model. The simulation model of the high-speed EMU was designed on the basis of the korean high-speed train and the design parameters for ride comfort were showed and the dynamic characteristics of the vehicle was understood. To consider the characteristics of the vehicle suspension, the analytical model was designed and the simulation model was verified with it.

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Study on the Key Technologies for Performance and Operation of the High-Speed EMU (동력분산형 고속철도 차량성능 및 운용 기반기술 연구)

  • Song, Dahl-H.;Min, Kyung-H.
    • Proceedings of the KSR Conference
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    • pp.1227-1232
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    • 2008
  • High-speed train of push-pull type called as G7 train has been developed and chosen as the model of KTX-II which will be operated on Honam Line nexr year. However, the EMU-type high-speed train appeared to be the recent trend that foreign markets have shown. Also, in the near future, a great number of new train sets are needed to accommodate the increased passengers in our country. Thus, development of the high-speed EMU was decided, planned, and started. In the development, included were almost all fundamental key technologies such as noise and vibration reduction in a passenger cabin, running characteristics, aerodynamic analysis, crashworthiness evaluation, EMI/EMC analysis, design of the cooling system for the propulsion control system, enhanced performance of transformer and switching converters, synchronous traction motor with permanent magnets, new design of front nose and ergonomic interiors, application of advanced information technology(IT) and smart sensors and the cost reduction of construction of railway bridges, etc. Each key technologies are carried out as sub-project independently but under the supervision of a project. The project will develop the high advanced level of technologies and provide necessary know-why's and support the team in charge of the development of the high-speed EMU, Hyundai Rotem Co. Ltd. The high-speed EMU will be successfully developed with the support of the project.

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Verification of Running Safety Evaluation Method for High-speed Railway (고속열차 주행안전성 평가법에 대한 검증 연구)

  • Ryu, Sang-Hyun;Kim, Sang-Soo;Kim, Dae-Sik;Kim, Sang-Young;Hong, June-Hee;Lee, Ki-Jun
    • Journal of The Korean Society of Manufacturing Technology Engineers
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    • v.23 no.3
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    • pp.310-317
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    • 2014
  • The Next-generation High-speed Rail Technology Development Project was started in 2007 by the Korean Government with the aim of developing the core technologies for a high-speed electric multiple unit (EMU) railway system. This is the first attempt to develop a high-speed EMU railway. High-speed EMU trains have superior acceleration and deceleration compared to push-pull high-speed railways such as KTX(Korean Train eXpress). A prototype train was developed and tested on a high-speed line starting in 2012. The new train must maintain running safety during the test. Generally, the international standard (UIC518) is adopted to evaluate the running safety of trains. This method suggests that the test zone must have over 25 sections, and the length of each section must be 500 m. However, it is difficult to implement these test conditions for a real high-speed line. In this study, we analyzed the running safety using several test section lengths (100 m to 500 m) and compared the results. The results of this study will be used to establish a running safety evaluation method for high-speed EMU railways.

A Transformer Design and Magnetic Analysis Model for the High-Speed EMU (동력분산형 고속철도용 변압기 설계 및 자계해석 모델)

  • Park, Byoung-Gun;Hyun, Dong-Seok
    • Proceedings of the KSR Conference
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    • pp.517-524
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    • 2009
  • This paper proposes a magnetic analysis model and design method of transformer for the high-speed EMU. It has a many part of the consideration in design because the transformer in high-speed train has the multiple output. Also the output characteristic, weight, and size of transformer is an important factor. This research proposes a design method of transformer in high-speed EMU. And it is easy to design by using the analysis model in design the transformer through the establishment of the magnetic analysis model.

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High-Speed EMU : Basic Research on the Noise Reduction (동력분산형 고속철도 : 소음저감기술의 기초 연구)

  • Hong, Yun-H.;Kim, Jeung-T.;Kim, Jung-Soo;Kim, Seock-Hyun
    • Proceedings of the KSR Conference
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    • pp.1441-1447
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    • 2008
  • This research studies the effects of community noise around railway, noise from the inside/outside noise of the High-Speed EMU. First study part of this year is research of the noise source. The modeling methodology for prediction of noise level including the frequency property, velocity dependence, sound pressure of noise source is investigate. Second part is research on the sound transmission loss. An exclusive program which could analyze the sound transmission loss of the floor, the sides(mirror), insulator in High-Speed EMU has to be developed. Third part is research on the train inside/outside and Prediction for community Noise. In order to predict the noise when the High-Speed EMU is traveling at the outside and along tunnels, the result of the research can be derived by evaluating the effect of the noise on the upper/middle parts of the carriage and on the railroad way round about with using the program.

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Cost Reduction of Construction of Bridges for the High-Speed EMU (동력분산형 고속철도의 교량형식에 따른 교량건설비용 저감방안 연구)

  • Lee, Tae-Gyu;Kim, Hye-Uk
    • Proceedings of the KSR Conference
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    • pp.1195-1200
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    • 2008
  • The railway bridge design specification used in our country at present, is reflected results that take into account link between vehicle and roadbed according to decision of TGV vehicle style in 1994, and executes design verification. Hereafter, the particular loading condition and the design speed of the high-speed EMU that is recognized to the next generation of high speed railway, are plain difference with TGV vehicle style decided in 1994. The effect that these load and design speed get in roadbed, especially superstructure, displays difference with the existent high speed railway. The goal of this study is to choose the suitable bridge type, and to reduce the construction cost for the next generation of railway, i.e., the high-speed EMU.

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Vibration Reduction for the High-Speed EMU under Development (동력분산형 고속전철의 진동저감기술 연구)

  • Shin, Bum-Sik;Chun, Kwang-Wook;Choi, Yeon-Son
    • Proceedings of the KSR Conference
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    • pp.1154-1159
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    • 2008
  • Type of the high-speed train under development has been decided to be EMU(electric multiple Units) following the trend of the times, which is weak for vibration and noise due to the distributed traction unit of motors and gears than that of the articulated high-speed train. Also, passengers may feel uncomfortable at high-speed running due to the various vibration of vehicle itself and bogie, especially due to hunting, snake motion of the high-speed train. In this paper, explained was the program to develop the high-speed EMU at every step of basic and detail design and running test, predict and try to reduce the vibration.

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Vibration Analysis of High-Speed EMU Car Body Using Equivalent Stiffness and Shell Element (등가강성과 Shell 요소를 이용한 분산형 고속전철의 차체 진동 해석)

  • Baek, Seung-Guk;Shin, Bum-Sik;Choi, Jin-Hwan;Lee, Sang-Won;Choi, Yeon-Sun;Koo, Ja-Choon
    • Proceedings of the KSR Conference
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    • pp.217-222
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    • 2009
  • High-speed EMU under development vibrates more than a articulated high-speed train since power units are attached on each vehicle and railway vehicle. In this study, anisotropic equivalent stiffness of a aluminum extrusion plate were calculated to know and predict vibration characteristic of High-speed EMU under development. Eigen frequencies and modal shape of high speed train vehicle were calculated. And vibration generated was predicted at each position of vehicle when vehicle was operating.

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A Study of Noise Sources Analysis for High Speed EMU (분산형 고속철도 차량의 소음원 분석 연구)

  • Hong, Yun-Hyuck;Kim, Jeung-Tae;Kim, Jung-Soo
    • Proceedings of the KSR Conference
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    • pp.1026-1032
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    • 2010
  • In this paper, To estimate the train exterior noise and environment noise which are occur when High-Speed EMU is driving with the speed of 370km/h, Estimated sound source about noise that is appeared during operation based upon noise SPL values. Based on aero-dynamic noise source and wheel-rail noise source, these were already used to the existed research, we have estimated each sound power about measured noise, and computed the sound source to apply on the High-Speed EMU, and also calculated the sound power in case of the maximum operation speed of 370km/h.

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User-centric Scalability Measurement System of Large-Scale Measurement Data for 400km/h High-Speed Railway (400km/h 고속철도 대규모 계측데이터 사용자 중심 확장성 계측시스템)

  • Hwang, Kyung-Hun;Park, Sun-Kyu;Song, Byung-Keun;Yang, OK-Yul
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.2
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    • pp.1157-1163
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    • 2014
  • Needs for a new technologies of infrastructure systems arose, following the development of next generation EMU(Electric Multiple Unit) train with maximum speed over 400km/h. For high-speed operation tests of the new EMU, a high-speed railway infrastructure test-bed was constructed in a 28km long section of the Honam High-speed Railway. Diverse sensors and monitoring system was installed for continuous monitoring of the railway. Due to such effort, further demands and needs of the integrated monitoring system was derived in a more comprehensive and long-term perspective.