• Title/Summary/Keyword: Railway vehicle

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Reliability Evaluation of Air Spring for Railway Vehicle (철도차량용 공기스프링 신뢰성 평가기준 및 시험)

  • Woo Chang-Su;Kim Wan-Doo;Kim Suk-Won;Kim Young-Gu
    • Proceedings of the KSR Conference
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    • pp.597-603
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    • 2003
  • Air spring system in railway vehicles primarily ensure the air suspension of the vehicle body. 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 domestic development productions are obtained the good results.

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Are Flywheels Right for Rail?

  • Read, M.G.;Smith, R.A.;Pullen, K.R.
    • International Journal of Railway
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    • v.2 no.4
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    • pp.139-146
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    • 2009
  • Vehicle braking in non-electrified rail systems wastes energy. Advanced flywheel technology presents a way to capture and reuse this braking energy to improve vehicle efficiency and so reduce the operating costs and environmental impact of diesel trains. This paper highlights the suitability of flywheels for rail vehicle applications, and proposes a novel mechanical transmission system to apply regenerative braking using a flywheel energy storage device. A computational model is used to illustrate the operation and potential benefits of the energy storage system.

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Development of Regeneration Inverter using 3-Level Inverter (3레벨 인버터를 이용한 직류전력 회생인버터 개발)

  • 김상균;박채운;최종묵
    • Proceedings of the KSR Conference
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    • pp.1007-1012
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    • 2002
  • In this paper, a regeneration inverter is proposed using 3-level inverter. Electric regeneration means regeneration brake in electric railway vehicles. Induction motors, generally used with railway vehicles, convert the electric energy to the movement energy when vehicle is running. When the vehicle stop, the induction motor convert the movement energy to the electric energy. Usually, this energy is used with another running vehicle in the same section. If there is no vehicle around when the regeneration is occurred, regeneration energy is consumed by heat energy with resistors. The proposed inverter is capable of reuse this regeneration energy in another place.

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Vehicle/track dynamic interaction considering developed railway substructure models

  • Mosayebi, Seyed-Ali;Zakeri, Jabbar-Ali;Esmaeili, Morteza
    • Structural Engineering and Mechanics
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    • v.61 no.6
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    • pp.775-784
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    • 2017
  • This study is devoted to developing many new substructure models for ballasted railway track by using the pyramid model philosophy. As the effect of railway embankment has been less considered in the previous studies in the field of vehicle/track interaction, so the present study develops the pyramid models in the presence of railway embankment and implements them in vehicle/track interaction dynamic analyses. Considering a moving car body as multi bodies with 10 degrees of freedom and the ballasted track including rail, sleeper, ballast, subgrade and embankment, two categories of numerical analyses are performed by considering the new substructure systems including type A (initiation of stress overlap areas in adjacent sleepers from the ballast layer) or type B (initiation of stress overlap areas in adjacent sleepers from the subgrade layer). A comprehensive sensitivity analyses are performed on effective parameters such as ballast height, sleepers spacing and sleeper width. The results indicate that the stiffness of subgrade, embankment and foundation increased by increasing the ballast height. Also, by increasing the ballast height, rail and ballast vertical displacement decreased.

Dynamic Performance Analysis of an Active Secondary Suspension for a Railway Vehicle (철도차량 능동이차현가장치의 동적 성능 해석)

  • Park, Joon-Hyuk;Shin, Yu-Jeong;Hur, Hun-Moo;You, Won-Hee
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.854-855
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    • 2011
  • Active suspension technology of railway vehicles has received attention as the way to replace the current passive suspension. This paper deals with the dynamic performance of an active suspension system for a railway vehicle. To verify performance of an active suspension, the dynamic performance of the railway vehicle with active suspension system analyzed and compared with conventional suspension system by using the VI-rail program.

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Carbody Lateral Displacement of Railway Vehicle According to 2nd Lateral Damper and Track Characteristics (철도차량 2 차 횡댐퍼 및 궤도특성에 따른 차체 횡변위 변화 연구)

  • You, Won-Hee;Shin, Yu-Jeong;Hur, Hyun-Moo;Park, Joon-Hyeok
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.722-728
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    • 2012
  • In railway vehicle, riding comfort depends mainly on the secondary lateral damper and track condition. When the damping force of lateral damper becomes abnormal condition or the track condition is worse, the running stability and ride comfort of the railway vehicles go down. In addition, the lateral motion of carbody is increased. Therefore, the lateral motion of carbody is reviewed carefully by considering lateral damping force and track condition of the railway line in design stage. In this study, the lateral displacement of carbody was studied in accordance with lateral damping force and track condition. The target vehicle is EMU for subway line.

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Comparison Study of Sound Transmission Loss in High Speed Train

  • Kim, Tae-Min;Kim, Jeung-Tae
    • International Journal of Railway
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    • v.4 no.1
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    • pp.19-27
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    • 2011
  • Many studies for improving the railway vehicle's performance and comfort such as speed, weight and noise are currently in progress. Improving the structural characteristics of the vehicle for greater noise insulation is considered important for reducing disturbance due to noise, but measuring transmission loss entails large costs. This study explores an alternative method for estimating and measuring the railway vehicle's transmission loss that involves on applying the numerical analysis coupled with scaled reverberation chamber measurement. The transmission loss measurement using scaled reverberation chamber was performed after the compensation value was found through 1mm thickness(1t) specimen. For numerical analysis, a commercially available acoustics solver VA ONE was used. The proposed method is found to lead to transmission loss measurement comparable to the measurements based on large-scale reverberation chamber. Thus, it can be argued that a reliable method has been developed for measuring railway vehicle's transmission loss.

A Study on Propulsion Control Device Characteristics of Small-scale Electric Railway Vehicle according to Driving Curve Tracking using Fuel Cell Generation System (연료전지 발전시스템을 이용한 축소형 철도차량의 운전곡선 추종에 따른 추진제어장치 특성 고찰)

  • Jung, No-Geon;Chang, Sang-Hoon;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.12
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    • pp.1804-1809
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    • 2015
  • The study in railway system to apply a fuel cell system with high efficiency and mobility than other renewable energy is being actively conducted. It is needed a analysis on load characteristics and control method of rolling stock in order to apply to rolling stock. This paper presents study on control small-scale prototype power converter electric railway vehicle using fuel cell generation system. Experiment is conducted through real fuel cell generation system and reference speed applying the driving curve of the actual electric railway vehicle was applied. Also, output voltage of boost converter is controlled considering characteristic of fuel cell. And it was confirmed characteristic according to powering and regeneration of inverter.

Energy Regenerative Damper Applied to the Railway Vehicle (철도차량의 현가장치로서 에너지 재생 댐퍼 이용에 대한 고찰)

  • Kim Sang-Soo;Park Chun-Soo;Mok Jin-Yong;Seo Sung-Il;Lee Tae-Hyung;Kim Ki-Hwan
    • Proceedings of the KSR Conference
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    • pp.375-380
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    • 2004
  • Vibration of railway vehicle has harmful effect to dynamic performances of railway represented to stability, safety and ride comfort. Hence reduction of vibration has been discussed as an important problem and has been widely investigated. A new technology of vibration control, energy regenerative control, is introduced. Energy regenerative damper using this new vibration control converts vibration energy into other kind of energy that we can utilize. In this paper, this energy regenerative damper is applied to the dynamic absorber and vehicle suspension. And it is evaluated whether the energy regenerative railway vehicle suspension is possible.

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Running Characteristics for On-Line Test of Railway Vehicle

  • Han, Young-Jae;Kim, Seog-Won;Seo, Sung-Il;Mok, Jin-Yong;Lee, Su-Gil;Kim, Young-Mo
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1347-1350
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    • 2005
  • Recently, as the road capacity reaches a limit and environmental problems become serious, there exists a gradual increasing need for railway vehicles that are environment-friendly, punctual, reliable and safe. Accordingly, in addition to conventional railroad vehicles, lots of vehicles are being newly developed. Using the developed installed measurement system, the performance characteristics of railway vehicle could be monitored precisely. After recording the input real time data of each signal from railway vehicle to the network line, we could acquire the needed information through post processing program. We could verify the running performances of railway vehicle using this system. As a result, many latent defects have been found and corrected in the prototype train. The measurement systems have contributed to dramatic reduction of the developing period.

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