• Title, Summary, Keyword: High-speed Railroad

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The Study for Rolling Stock System Design of Ho-Nam High Speed Railroad of Korea (호남고속철도 차량 시스템 설계에 관한 연구)

  • 박광복
    • Proceedings of the KSR Conference
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    • pp.358-369
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    • 2001
  • KTX will be operated on Kyun-Pu High Speed Railroad Line around end of 2,003 and KHST(G7 Korea High Speed Train) will be carried out the development running test at Kyun-Pu High Speed Railroad Line from middle of 2002. By the way, the conventional Ho-Nam railroad line was passed the limit capacity of transportation at some area from 1997. For solving of this matter, Ho-Nam railroad line need new high speed railroad line for high transportation capacity of passengers now. This report was studied about the rolling stock system design used new technology of KHST and KTX for Ho-Nam High Speed Railroad.

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A Study on the Improvement of Project Management System for International Competitive Power and Global Business Strategy of Rail Project (철도사업의 종합사업관리 국제경쟁력 강화방안에 대한 연구)

  • Lee Young-Joo;Jang Seong- Yong
    • Proceedings of the KSR Conference
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    • pp.1595-1600
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    • 2004
  • High speed railroad project management has been almost completed by starting operation of Seoul-Busan high speed railroad with the exception of a few constructing blocks currently in April, 2004. After Korea Rail Network Authority was established in 2004, it needs to develop new project management system for both conventional railroad construction and high speed railroad construction for domestic railroad projects, while it plans to invest in overseas railroad project for logistics innovation and improvement in passenger transport services on a large scale. Therefore this paper provides the method that we can adapt the project management system for high speed railroad containing experiences and know-how from construction of high speed railroad for both conventional railroad construction and high speed railroad construction or improve project management system for high speed railroad to use it as project management system for overseas railroad projects.

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Noise Effects of High Speed Train on Coventional Track (기존선에서 고속전철 운행시 소음평가)

  • 나희승
    • Proceedings of the KSR Conference
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    • pp.948-953
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    • 2002
  • As the delay of the Kyungbu High Speed Railroad, HST should use conventional line through Daegoo to Pusan until the new railroad build. High speed railroad noise is one of the main causes of environmental impact. Whenever HST on conventional railroad line is planned or a housing project near an existing railroad is proposed, an estimate of the relevant noise levels is usually required. For this, it is necessary to quantify those parameters that affect the railroad noise. This paper deals with an estimation of high speed railroad noise on conventional line.

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Safety Margin Evaluation of Railway wheel Based on Fracture Scenarios

  • Kwon, Seok Jin;Lee, Dong Hyung;Seo, Jung Won;Kwon, Sung Tae
    • International Journal of Railway
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    • v.5 no.2
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    • pp.84-88
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    • 2012
  • Derailment due to wheel failure would cause a tremendous social and economical cost in service operation. It is necessary to evaluate quantitatively the safety with respect to high-speed train. Although the safety of railway wheel has been ensured by an regular inspection, all critical defects cannot be detected in inspection cycles and the wheel has been replaced because a defect quickly become critical for safety. Therefore, it is important to calculate quantitatively the fracture limit and remnant life of damaged railway wheel in wheel-rail system. In present paper, the critical crack size of wheel for high-speed train is simulated based on fracture scenario and the safety of wheel is evaluated.

Development of a Steady Arm for the Maximum Speed of 400 km/h (400 km/h급 전차선로 곡선당김금구 개발)

  • Lee, Kiwon;Park, Young;Kwon, Sam-Young;Cho, Yong Hyeon;Jeong, Heonsoo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.12
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    • pp.1742-1746
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    • 2014
  • In order to develop a overhead catenary system for the maximum speed of 400 km/h on Honam high-speed line, increasing tension of contact wire, changing dropper distributions, reducing a hard point and etc. should be considered. And it is also essential to develop core components taking account of the increased tension. Therefore we developed a new steady arm for the max. speed of 400 km/h in this study. FEM (Finite Elements Method) analysis was performed to ensure the strength of the arm. An oval shape was applied to the arm, so that 25 % of strength was increased and 9 % of weight was decreased. And a type test according to the code KRSA-3012 was performed to ensure the performance. Fatigue test in KRRI (Korea Railroad Research Institute)'s test-bed was also performed to evaluate its performance. Some section of the Honam High-speed line was constructed with the developed steady arm.

Analysis of Vibration Parameters for the Fault Diagnosis of Reduction Unit for High-speed Train (고속철도차량 감속기 결함진단을 위한 진동 파라미터 분석)

  • Kim, Jae Chul;Ji, Hae Young;Lee, Kang Ho;Moon, Kyung Ho;Seo, Jung-Won
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.7
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    • pp.679-686
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    • 2013
  • The reduction unit is one of the most important components in railway cars, due to the transmission of torque from the motor to the wheels. Faulty reduction gears in high-speed trains result from excessive wear on the gear or damage to the gear. These types of gear defects have a significant effect on high-speed rail operation and safety; thus, a diagnosis system for the reduction unit is needed. Vibration diagnosis technology is one of the most effective diagnostics. In this paper, the vibration parameters of a reduction unit were evaluated during a driving-gear test and a full-vehicle test, using kurtosis and the crest factor. These tests were performed under normal operating conditions; a specimen tester was used to diagnose problems in defective gears.

Comparison of Ride Comfort between Korean and European High Speed Railway by using Continuous Comfort Method (Continuous Comfort 방법을 이용한 국내외 고속철도 승차감 비교)

  • Choi, Il-Yoon;Um, Ju-Hwan;Lee, Jun Suk;Choi, Min-Ji;Lim, Jihoon
    • Journal of the Korean Society for Railway
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    • v.18 no.3
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    • pp.203-211
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    • 2015
  • Ride comfort of a vehicle can be utilized to maintain the track geometry and track irregularities because ride comfort of the rolling stock is affected by the characteristics of the vehicle and track. Ride comfort was evaluated according to the measured floor acceleration data of vehicles for a Korean high speed line as well as European high speed lines using Continuous comfort method which can be applied to track maintenance. The exceedance distribution of the ride comfort was quantitatively analyzed by the vehicle speed, the ride comfort of the Korean high speed line was compared with that of European high speed lines. It is shown that the ride comfort of Korean high speed line is better than that of European high speed lines, which indicates that the Korean track geometry and track irregularities are properly maintained.

A Study on a Sensitivity Analysis of Design Parameters for the Speed-up of Overhead Rigid Conductor System (강체전차선로 고속화를 위한 설계파라미터 민감도 분석 연구)

  • Lee, Kiwon;Cho, Yong Hyeon;Kwon, Sam-Young;Park, Young
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.2
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    • pp.453-458
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    • 2017
  • R-Bar (Overhead Rigid Conductor system) has been lately used for the speed of over 200km/h in Europe, while it has been developed and used for the max. speed of 120km/h in Korea. Because R-Bar has advantages of reduction of tunnel cross sectional area and maintenance, its development for more high-speed is urgent in Korea having many mountain area. Therefore a sensitivity analysis of design parameters for the speed-up of R-Bar has performed in this study. For the analysis, we have developed a program for the prediction of dynamic characteristics between a pantograph and R-Bar. The program was evaluated with the actual test result and a current collection performance according to the parameters such as a distance between brackets, a stiffness of bracket and of R-Bar rail was predicted with the program.

A Study on the Measurement of Contact Force of Pantograph on High Speed Train

  • Seo, Sung-Il;Cho, Yong-Hyun;Mok, Jin-Yong;Park, Choon-Soo;Kim, Ki-Hwan
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1374-1378
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    • 2005
  • Appropriate upward force is crucial for the pantograph on high speed train to collect current from the catenery system without separation. However, at high speed, large aerodynamic lifting force is generated by the contact plate and the arms of pantograph, which may cause wear of the contact wire. In this study, to confirm the interface performance of the pantograph on Korea High Speed Train, a method to measure the contact force of the pantograph was proposed and the related measurement system was developed. The forces acting on the pantograph were clarified and a procedure to calculate the aerodynamic lifting force was proposed. A special device was invented and applied to measure the lifting force. Measured contact forces were displayed by the developed system and evaluated according to the criteria. Countermeasures were also taken to reduce the contact force based on the results.

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Verification of High Speed Performance for the Electronic Pedal using a Rotor (회전체를 이용한 전자페달의 고속 성능 검증)

  • KIM, Yong-Kyu;GO, Jun-Young;YOON, Yong-Ki;KIM, Ju-Yeop;LEE, Jong-Hyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.8
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    • pp.1450-1456
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    • 2016
  • In this paper, we have checked a method of performance evaluation for electronic pedal, which is a core technology of HBD for detecting the axle temperature of high-speed train. As it is practically impossible to conduct train speed test of 500 km/h, we utilize a high speed rotor for evaluating high speed performance of the electronic pedal instead. According to this method, we found that the measurement results by the velocity measuring instrument is similar with the ones from this research through the high speed rotor. In conclusion, it will be possible to conduct reliability evaluation for high speed performance for Beacon, Balise and RFID, which are utilized for transmitting vital information of train control systems through using the rotor.