• Title, Summary, Keyword: Rolling Stock

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Development of a framework for engineering RAMS into rolling stock through life cycle in the operator perspective (철도차량의 개발 및 운용을 위한 RAMS 관리 시스템 개발)

  • Park, Mun-Gyu;An, Min
    • Proceedings of the KSR Conference
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    • pp.2179-2194
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    • 2010
  • RAMS is becoming increasingly important in the decision making process for the rolling stock projects in order to improve competitiveness by reducing system life cycle cost while improving reliability, availability, maintainability and safety. In order to apply and manage RAMS of rolling stock systems effectively in the operator perspective, it is essential to integrate and control RAMS systematically from the early stage of rolling stock projects. RAMS management is to implement a RAMS system into rolling stock projects in terms of a rolling stock operator, which presents the strategic directions of RAMS policy, objectives, requirements, control, analysis, measurement and improvement throughout life cycle of rolling stock projects. This article presents a new framework of RAMS management that provides an effective and efficient way for managing RAMS in rolling stock systems in the railway industry.

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Three-Dimensional Flow Analysis around Rolling Stock with Square Cross Section Using Low Re ${\kappa}-{\epsilon}$ (사각 단면을 갖는 철도차량 주위의 3차원 유동해석)

  • Jang, Yong-Jun
    • Journal of the Korean Society for Railway
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    • v.9 no.6
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    • pp.772-777
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    • 2006
  • Three-dimensional numerical study is performed for the flow analysis around the rolling stock with square cross section (Mugungwha train model). The height (H) of rolling stock is considered as the characteristic length and the total length of rolling stock is 40 which correspond to 1/2 unit of rolling stock. The gap between the surface and rolling stock is 0.17H which is average value. The relative velocity between the surface and rolling stock is assumed to be zero and Re=10,000 based on the characteristic length. Low Re ${\kappa}-{\epsilon}$[15] is employed for the calculation of turbulence which resolve all the way to the solid surface (laminar sub-layer). Large flow separation occurred at the front head of train and a pair of vortex is generated on both top and side of rolling stock. The behavior of vortices on the top of the rolling stock is believed to affect the performance of the pantograph which should be intensively investigated. The difference between the high pressure in the front stagnation region of train and the low pressure in the rear separated region causes a large pressure drag. A large pair or vortex are generated in the rear of train and the size of vortex is increased more than the size of cross section of train.

Analysis of Requirements for Testing Operation of the Rolling Stock on the Main Line (철도차량 본선 운행선로 시운전에 관한 요건 분석)

  • Choi, Kyung-Jin;Yang, Doh-Chul;Choe, Kang-Youn
    • Proceedings of the KSR Conference
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    • pp.2286-2291
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    • 2011
  • Technology on the rolling stock is very composition and system engineering. We have to consider to many parameters on the rolling stock design. High speed train is interface between rolling stock and infra system of rail, signal, communication etc. For many years testing operation has experienced substantial growth based on various advanced new technology. Recently some problems was clearly stated on effective management, practical use and testing operation of the the rolling stock on the technology change. This paper presents some results of the study on necessary requirements of the operation testing for rolling stock technology change. We propose a general plan to suggest the operation testing and the parameters of the rolling stock on the technology change in the text.

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A Study on Reliability Centered Rolling Stock Maintenance Methods (철도차량 신뢰성기반유지보수 방안 연구)

  • Yu, Yang-Ha;Lee, Nak-Young
    • Journal of the Korean Society for Railway
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    • v.16 no.3
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    • pp.183-188
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    • 2013
  • The purpose of maintaining rolling stock is to perform train service without failure during operation. It is not possible to prevent failure, however, by using periodic preventive maintenance methods, because new rolling stock is made from many electric components and requires the application of IT skills. RAMS (Reliability, Availability, Maintainability, Safety) methods have consequently been applied to new manufactured rolling stock in KORAIL since implementation of the KTX. With this approach it is possible to verify the reliability at the operating stage, and RCM (Reliability Centered Maintenance) methods for maintenance have been applied to manufactured rolling stock since the beginning of KTX service. A RCRM (Reliability Centered Rolling-stocks Maintenance) system suitable for the characteristics of rolling stock and operational factors is introduced in this paper.

Collision-induced Derailment Analysis of a Finite Element Model of Rolling Stock Applying Rolling Contacts for Wheel-rail Interaction (차륜-레일 구름접촉을 적용한 철도차량 유한요소 모델의 충돌 기인 탈선거동 해석)

  • Lee, Junho;Koo, Jeongseo
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.3
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    • pp.1-14
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    • 2013
  • In this paper, a finite element analysis technique of rolling stock models for collision-induced derailments was suggested using rolling contacts for wheel-rail interaction. The collision-induced derailments of rolling stock can be categorized into two patterns of wheel-climb and wheel-lift according to the friction direction between wheel flange and rail. The wheel-climb derailment types are classified as Climb-up, Climb/roll-over and Roll-over-C types, and the wheel-lift derailment types as Slip-up, Slip/roll-over and Roll-over-L types. To verify the rolling contact simulations for wheel-rail interaction, dynamic simulations of a single wheelset using Recurdyn of Functionbay and Ls-Dyna of LSTC were performed and compared for the 6-typical derailments. The collision-induced derailment simulation of the finite element model of KHST (Korean High Speed Train) was conducted and verified using the theoretical predictions of a simplified wheel-set model proposed for each derailment type.

IGBT VVVF INVERTER AS A PROPULSION SYSTEM FOR ELECTRIC CAR (전동차 견인용 IGBT VVVF 인버터)

  • Chung, E.S.;Park, Y.H.;Jang, K.H.;Lee, S.J.;Bae, B.H.;Kim, J.S.;Kim, S.H.
    • Proceedings of the KIEE Conference
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    • pp.373-375
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    • 1997
  • In this paper, we present IGBT VVVF inverters as a 1C1M propulsion system for electric car. These inverters are composed of high power IGBT's and controlled by compact control units. The control unit performs full digital control by using 32bit DSP and microcontroller. By using CAN-bus, high speed network is constructed within four control units. The stack is simplified and optimized by using plate bus and IGBT driver units of hybrid-type.

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Rolling Stock Fire Engineering aspect of System Engineering (System Engineering 측면에서 전동차 화재기술관리)

  • Chang, Jung-Hoon;Kang, Chan-Yong
    • Proceedings of the KSR Conference
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    • pp.163-168
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    • 2005
  • In case of rolling stock, SEMS is generally applied in the advanced countries, but is start stage in our country. SEMS is defined the system engineering management system in order to achieve the optimized train performance among the several client requirements aspect of technical engineering management during the design life cycle. And the fire engineering activities in hong kong EMU project are introduced aspect of SEMS in this paper. The fire engineering at rolling stock in view of SEMS controls to apply the satisfied interior material by the fire safety standards (regulation of the commute urban subway safety guideline by the MOCT, BS 6853, NFPA 130, NF F 16-101) and to minimize the fire load in order that passengers egress safe from the fired rolling stock. The rolling stock in the advanced countries is designed to stand for 15-20 minutes in considering the rolling stock to be fired in tunnel. For passenger fire safety, the passenger evacuation provision and progress is set up.

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Target Market Selection Using MCDM Approach: A Study of Rolling Stock Manufacturer

  • SUKOROTO, SUKOROTO;HARYONO, Siswoyo;KHARISMA, Bedy
    • The Journal of Distribution Science
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    • v.18 no.7
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    • pp.63-72
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    • 2020
  • Purpose: This study examines the market segmentation and strategy of PT INKA, a rolling stock manufacturer in Indonesia. Research design, data and methodology: The study used the MCDM (Multiple Criteria Decision Making) method specifically the AHP (Analytical Hierarchy Process). The AHP method was applied to identify the target market. This method or approach considers the market attractiveness and competitive strength criteria with quantified parameters. Results: a) Australia, Kenya, Tanzania, New Zealand, and India emerge as the top five target markets; b) There is justification for rolling stock manufacturers to allocate their resources in winning the market share. Conclusion: The main challenge confronting the rolling stock manufacturer is limited resources to acquire a particular market share despite abundant opportunities in this sector. Despite the mastery of technology and long experience in the industry, selecting a target market with multiple criteria could be difficult for an emerging rolling stock manufacturer in South East Asia.

A Study on the Rolling Stock Workshop to Analyze the Contribution to the Modern Korean Architecture (한국근대기 철도공장의 건축적 특성에 관한 연구 -용산공장을 중심으로-)

  • Lee, Sang-Haeng
    • Journal of the Korean Society for Railway
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    • v.12 no.6
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    • pp.1049-1058
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    • 2009
  • Korea's Rolling stock workshop were established with the introduction of a railway, and became the center of industrial construction in the modern age of Korea. There still exist a lot of Rolling stock workshop buildings in the Youngsan Rolling stock workshop, the representative case of Korean Rolling stock workshop, and especially the study aims to look into modern architectural properties centered on those well-preserved buildings. Korea's Rolling stock workshop were built considering the proper conditions of location such as the neighboring districts from the port to transport vehicles and materials, the place where railroad lines are centralized, the short returning distance of railroad cars for entry and departure, and had the facility layout according to the order of a working process of vehicles, and the unique structure and the section facade shape with proper functions and sizes according to each purpose. In particular, they actively adopted steel-frame structure and reinforced concrete structure, and came to have the initial characteristics of Korea's modern industrial building which is called the structural transition. Therefore, this study aims to highlight the importance of Rolling stock workshop including the Youngsan Rolling stock workshop as industrial architecture heritage in the modern age of Korea.

Comparison of Impact Simulation Result for Rolling Stock Vehicle Coupler System (철도차량 연결기용 완충장치에 대한 충돌해석 결과 비교)

  • Jang, Hyeon-Mog;Kim, Ki-Nam;Park, Young-Il
    • Journal of the Korean Society for Railway
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    • v.13 no.3
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    • pp.251-256
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    • 2010
  • By legislating safety regulations for design, manufacturing and operation of rolling stock through rolling stock safety law, diverse of safety requirements have been established. On the other hands, differences of technical level in practical circumstances between domestic and overseas are pointed out that not be able to be overcome in short period. About collision safety requirements for rolling stock, European countries have been applying TSI requirement to all of rolling stock and domestic collision safety requirements in rolling stock safety law are based on TSI. In following thesis, it is showing an analysis simulation for current rubber cushion and hydraulic buffer system to verify if they are fit to collision safety requirements and result of the simulation program for prior verification. This also suggests a method to prove the performances of coupler system for future.