• Title, Summary, Keyword: Railway vehicle

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휠-레일 접촉모듈을 포함한 동역학 해석 프로그램 개발 (Development of a Dynamic Simulation Program Including a Wheel-Rail Contact Module)

  • 조재익;박태원;윤지원;이수호;정성필
    • 한국철도학회논문집
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    • v.13 no.1
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    • pp.16-22
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    • 2010
  • 다양한 철도차량 동역학 해석 프로그램들은 장단점을 가지고 있다. 이러한 프로그램들은 가선계를 표현할 수 있는 대변형체를 나타낼 수 없는 한계를 가지고 있다. 본 연구에서는 철도차량의 동역학 해석을 할 수 있는 프로그램을 개발하였다. 이 프로그램은 강체, 유연체, 대변형체에 대한 해석을 수행하고 상용프로그램과의 비교를 통하여 신뢰성을 확보하였다. 또한 가선계를 대변형체로 고려하였고, 강체와 대변형체를 연결하는 미끄럼 조인트를 추가하였다. 여기에 휠-레일 접촉모듈을 추가하여 철도차량의 동역학 해석이 가능한 프로그램을 개발하였다.

MR 댐퍼가 적용된 철도차량 이차현가장치의 H 제어 (H Control of Secondary Suspension in Railway Vehicles Equipped with a MR Damper)

  • 신유정;유원희;허현무;박준혁
    • 한국정밀공학회지
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    • v.30 no.10
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    • pp.1051-1059
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    • 2013
  • In general, lateral ride comfort of railway vehicle is mainly influenced by a secondary suspension placed between the bogie and carbody. Higher operating speeds of train results in increased vibration of carbody, which has a negative impact related to the ride comfort. To solve this problem, researches to replace the conventional passive suspension with (semi)active technology in the secondary suspension of a railway vehicle have been carried out. The semi-active suspension using the magneto-rheological damper is relatively simpler system and has advantage in maintenance compared to the hydraulic type semi-active damper. This study was performed to reduce lateral vibration acceleration of carbody related to ride comfort of railway vehicles with a semi-active suspension system. The numerical analysis was conducted by replacing passive lateral damper with semi-active MR damper, and robust control with the MR damper was applied to the 1/5 scaled railway vehicle model.

동력분산형 고속철도의 주행성능 해석기술 연구 (Dynamic behavior analysis of the high speed EMC(Electric Multiple Unit))

  • 윤지원;박태원;이문구;전갑진;박성문;김정범
    • 한국철도학회:학술대회논문집
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    • pp.1160-1165
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    • 2008
  • The development of a new railway vehicle is under progress through the Next Generation High-Speed Rail Development Project in Korea. Its aim is to develope fundamental technology of the vehicle that can run over 400km/h. The new distributed traction bogie system, 'HEMU'(High-speed Electric Multiple Unit), will be used and is different from previously developed high speed railway vehicles. Previous vehicles adopted push-pull type system, which means one traction-car drives rest of the vehicle. Due to the difference, investigation on dynamic behavior and its safety evaluation are necessary, as a part of verification of the design specification. In this paper, current progresses of researches are presented. And the High-Speed Railway vehicle system is evaluated for a dynamic characteristic simulation. Proper models including air-suspension system, wheel-rail, bogie and car-body will be developed according to the vehicle simulation scenario. International safety standard will be applied for final verification of the system. This research can propose a better solution when test running shows a problem in the parts and elements. Finally, the vehicle that has excellent performance will be developed, promoting academic achievement and technical development.

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곡선부 통과열차의 레일 경좌 변화에 따른 주행안전성 해석 (A Running Safety Analysis of Railway Vehicle passing through Curve According to Rail Inclination Change)

  • 손명선;엄범규;강부병;이희성
    • 한국철도학회:학술대회논문집
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    • pp.1922-1928
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    • 2011
  • The rail inclination produces a wider bearing area between the wheel and the rail by moving the wheel rail contact area away from the gauge towards the centre of the railhead, thus improving the wear pattern of the railhead and wheel treads. It is essential to keep the rail inclination within the allowable range to ensure optimum track geometry. Neglecting the rail inclination geometrical parameters in a track quality evaluation can cause safety of railway vehicle and serviceability problems. In this paper, we examined the effect of the rail inclination in general geometry state of the railway track using VI-Rail and analyzed running safety when the railway vehicle passing through curves depending on change of the rail inclination and running speed.

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영구자석을 이용한 Shield moving형 와전류 제동기의 철도시스템 적용연구 (The Study on Shield Moving ECB with PM for Application of Railway Vehicle)

  • 이장무;한경희;최유영
    • 전기학회논문지
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    • v.63 no.12
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    • pp.1737-1741
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    • 2014
  • The railway ECB(Eddy Current Brake) is used for high speed vehicle of railway like as TGV, ICE, JR-500 because it has stable braking force at high speed. But it is not effective at low speed and it is difficult to save energy due to the excitation of electro-magnet. Although ECB with permanent magnet is used for roller-coaster, it can not control the braking force without clutch. In this paper, the shield moving ECB with PM is proposed for application of railway vehicle. The angle of shield can be changed for various braking force. It changes the flux amount from PM, then the braking force will be reduced. The brake of 800W is simulated by using the software, "Ansoft Maxwell". The characteristics of braking will be shown by the shapes of magnet, disk and various speeds.

고속열차용 Event Recorder 설계와 분석도구의 구현 (Implementation of Analysis Tool and Design of Event Recorder in Express Railway)

  • 김광렬;장동욱;한광록;손석원
    • 대한전자공학회:학술대회논문집
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    • pp.1159-1160
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    • 2008
  • For safety railway vehicle movement, analysis and recoding of railway vehicle speed and driving information has written by law. nowadays, base in europe, these system is spread of various advanced country. In this paper, We implement an event recorder which record the driving and breaking information of running railway vehicle. For the event recorder, We designed the data structures with data analysis tools and a protocol between Event recorder and data analysis tool. The verification of Analysis tool was tested by to made data by Event Recorder's emulator and information of real railway driving recording.

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Study on Soft-Switching Transformers Inductor Boost Converter for Fuel Cell Powered Railway Vehicle

  • Jung, No-Geon;Kim, Jae-Moon
    • Journal of Electrical Engineering and Technology
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    • v.13 no.6
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    • pp.2553-2560
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    • 2018
  • In Korea, there are no instances where a hydrogen fuel cell power generation system has been used in a railway vehicle. Only the basic topology has been studied. In the previous study, conventional converters using a single switch were applied to the fuel cell power generation system. Therefore, current stress on the switch at converter on-off transitions would be large when controlling a large-capacity railway vehicle. In addition, since the input side ripple is also large, there is a problem with a shortening of the lifetime of both the fuel cell power generation system and the inductor. In this paper, a soft-switching transformer inductor boost converter for fuel cell powered railway vehicles was proposed. A technique to reduce both the switching current stress generated during on-off transitions, and the input ripple current flowing in the inductor were studied. The soft-switching TIB converter uses a transformer-type inductor to configure the entire circuit in an interleaved method, and reduces both input current ripple and the current ripple of the inductor and switch.

철도차량용 공기스프링 실차시험 및 신뢰성 평가 (Reliability Evaluation of Air Spring for Railway Vehicle)

  • 우창수;김완두;최경진
    • 한국철도학회논문집
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    • v.8 no.2
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    • pp.182-187
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    • 2005
  • Air spring system was widely accepted for railway vehicle secondary suspension to reduce and absorb the vibration and noise. The low natural frequency ensures a comfortable ride and an invariably good stiffness. In this paper, the characteristics and durability test was conducted in laboratory by using servo-hydraulic fatigue testing system to reliability evaluation of air spring for electric railway vehicle. The experimental results show that the characteristics and durability of domestically developed productions are shown in good results. And to guarantee the adaption of air spring, the ride comfort and air pressure variation were measured in train test on subway line.

비선형 임계속도 검증을 위한 실험적 연구 (An Experimental Study on Validation of Nonlinear Critical Speed)

  • 정우진;김성원
    • 한국철도학회논문집
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    • v.3 no.1
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    • pp.12-18
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    • 2000
  • This paper addresses the experimental study on the nonlinear critical speed and the validity of simple prediction formulation. The experiment on nonlinear critical speed is carried out using roller rigs, which has been impossible on track because of a possibility of an accident. In addition, experiment for a bogie is performed to check the difference in modeling a full railway vehicle and a bogie. It is found that nonlinear critical speed proves to be an inherent phenomenon of a railway vehicle itself and the difference of test results between a full railway vehicle and a bogie is comparatively negligible. Finally. the accuracy of simple prediction formulation for outbreak velocity and response frequency in hunting is investigated.

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유지보수관점에서의 수명주기비용예측 소프트웨어 개발 (Development of Life Cycle Cost Estimation Software on the Aspect of Maintenance Strategies)

  • 전현규;김재훈;김종운;박준서
    • 한국철도학회:학술대회논문집
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    • pp.777-783
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    • 2007
  • Life cycle costing is one of the most effective cost approaches when we choose a solution from series of alternative so the least long-term cost ownership is achieved. Life cycle costing in railway industry has been focused on the prediction of investment for railway vehicles. But in today, the life cycle cost, LCC, prediction on the aspect of operation and maintenance cost through whole life cycle is highly necessary. In this paper, we present a strategy for the development of life cycle cost estimation software on the aspect of maintenance strategies of railway vehicle. For this purpose, we suggested a structure of LCC software based on the UNIFE LCC model. And we developed a pilot version of software to evaluate the LCC model that we suggested for railway vehicle. We performed LCC analysis on the brake module of metro vehicle in case study and concluded that the software and model developed in this research could enough to support engineers in choosing better cost effective solutions from many alternatives.

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