• Title/Summary/Keyword: 경량전철

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An Analysis of the Uncertainty Factors for the Life Cycle Cost of Light Railroad Transit (경량전철 교량 LCC분석을 위한 불확실성 인자 분석)

  • Won, Seo-Kyung;Lee, Du-Heon;Kim, Kyoon-Tai;Kim, Hyun-Bae;Jun, Jin-Taek;Han, Choong-Hee
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2007.11a
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    • pp.396-400
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    • 2007
  • Various ways of automated guideway transit construction are being planned recently owing to the policies of the national government and local municipalities as well as increasing investment from the private sector. Particularly, the increase in the private investment is increasing greatly in SOC (Social Overhead Cost). This trend of promoting private sector investment must be conducted on the basis of a thorough analysis of the economic feasibility of the project from the government and construction companies in the private sector. In other words, an accurate cost analysis of initial investment cost (Construction cost), maintenance/repair cost, profit making through the operation of the concerned facilities, cost of dissolution, etc. in terms of the life cycle is very much in need. Nevertheless, the analysis of uncertainty factors and its probabilistic theory are in need of development so that they can be used in the analysis of the economic feasibility of a construction project. First of all, the actual studies on maintenance/repair cost of automated guideway transit are scarce as of yet, prohibiting an accurate computation of the cost and its economic analysis. Accordingly, this study focused on the uncertainty analysis of the economic feasibility for civil engineering structures among automated guideway transit construction projects based on the rapidly increasing investment on such structures from the private sector. For this research purpose, a cost classification system for the automated guideway transit is proposed, first of all, and the data On the cost cycle of the civil structure facilities and their unit cost are collected and analyzed. Then, the uncertainty in the cost is analyzed from the perspective of LCC. In consideration of the current status with almost no. studies on maintenance/repair of such facilities, it is expected that the cost classification system and the uncertainty analysis technique proposed in this study will greatly enhance LCC analysis and economic feasibility studies for automated guideway transit projects in the future.

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A Study on The Load Test Method and Result For AL Car Body of LRT (경량전철차량 알루미늄 구조체 하중시험방법 연구 및 결과고찰)

  • Kim, Won-Kyung;Won, Si-Tae;Jeon, Chang-Sung
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.986-995
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    • 2008
  • This study introduces the testing results of the AL car body which is applied to LRT. The LRT car body is made of aluminum structure materials like a sandwich panel. The static load test was performed to evaluate the structural characteristic and stability of the AL car body. Considering the vertical, compressive, twisting load and 3-point supporting, Bend natural frequency Measurement, Twist natural frequency Measurement type as a testing terms, the structural stability of a car body was evaluated.

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A study of evaluation reliability growth for Korea-Automated Guideway Transit system (한국형경량전철시스템(K-AGT) 신뢰성 성장 평가에 관한 연구)

  • Han Seok-Youn;Lee Ahn-Ho;Ha Chen-Soo;Lee Ho-Yong
    • Journal of the Korean Society for Railway
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    • v.8 no.6 s.31
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    • pp.597-601
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    • 2005
  • Korea Railroad Research Institute(KRRI) developed the Driverless Rubber Tired Korea-AGT(Model: K-AGT) from 1999 to 2004. We have finished the safety and performance tests of K-AGT. Data obtained from this testing can be used to evaluate the growth of reliability. The most widely used traditional growth tracking model is included as IEC International standard. With the tracking model all corrective actions are incorporated during test, called test-fix-test. In the test-fix-test strategy problem modes are found during testing and corrective actions for these problems are incorporated during testing. In this paper, we demonstrated reliability analysis using growth model of driverless rubber tired K-AGT system to prove reliability of development system. Therefore, we introduce the well-known NHPP model and analyze a reliability growth using ReliaSoft's RGA software.

The Development of Third Rail Current Collecting Shoegear for Light Rail Transit (경량전철용 제 3궤조 집전장치의 시제품 개발)

  • 정락교;김연수;윤용기;이병송;이병택;이정식
    • Proceedings of the KSR Conference
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    • 2000.05a
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    • pp.618-625
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    • 2000
  • In general, a third rail current collecting shoegear is used widely in the light rail transit system, which is more efficient than overhead pantograph. Therefore, Korean standard specifications for the light rail transit prescribes for the application of it. This paper describes the development of third rail current collecting shoegears, which is suitable to Korean situation and satisfied with Korean standard specifications, Two types are developed for steel wheel AGT system and rubber tyred AGT system, and various experiments are executed.

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The Study on Configurations and Interferences of differential gear unit for Light Rail Transit (경량전철용 차동기어장치의 구성 및 간섭에 관한 연구)

  • 김연수;박성혁;이우동;정종덕;한석윤
    • Proceedings of the KSR Conference
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    • 1999.11a
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    • pp.99-106
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    • 1999
  • Because many light rail transit systems are mainly operated in the downtown areas of a large cities and the congestion areas, there are many steep gradients and sharp radius sections in that lines. As that reasons above, light rail vehicles are equipped with differential gear units between traction motors and final reduction gear units. In this paper, the configurations and the interferences of 2K-H I type Planetary gear train, which is applicable for light rail vehicles and based on various differential gear units, are studied. The ranges of addendum modification coefficients which would not lead to interferences is analyzed, and optimal addendum modification coefficients among these ranges are presented, which generate the maximum efficiency of planetary gear drives and differential gear unit as pressure angles, speed ratios,

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On Slimming down the Functions Room of Light Rail Transit Stations by Utilizing an Enhanced DSM Method (개선된 DSM 기법을 통한 경전철 정거장 기능실의 슬림화에 관한 연구)

  • Kim, Joo-Uk;Park, Kee-Jun;Kim, Young-Min;Lee, Jae-Chon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.2
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    • pp.927-939
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    • 2015
  • It appears that the rapid advance in technology has allowed to broaden the variety of rail systems technology, thereby fostering new business opportunity in rail industry. The direction of rail systems operations is mainly two fold. In one direction, long distance operations between mega cities are pursued with help of high speed trains under development. In the other case, relatively short distance operations for covering intra-city or suburban area are becoming popular. A good example of the latter case is light rail transit (LRT) systems. Due to the short distance operation, it is thus expected that both the development and operation cost for LRT systems be reduced to some extent. The cost reduction desired in there can be gained by scaling down the sizes of both the trains and stations as compared to those of normal rail systems. However, it is not well known how the LRT stations can be scaled down. The objective of this paper is to study on how to slim down the stations (particularly, the functions room) of LRT systems. To achieve the objective, an approach is studied based on a modified method of design structure matrix (DSM). Specifically, using the enhanced DSM method, an integrated architecture is developed for the functions room, in which equipments are housed to perform the functions of electricity, signaling, and communication for LRT stations. The use of the result indicates that the desired reduction can be obtained with the approach taken in the paper.

A Study on the Systems Engineering based Verification of a Systems Engineering Application Model for a LRT Project (경량전철사업 시스템엔지니어링 전산모델 검증에 관한 연구)

  • Han, Seok-Youn;Kim, Joo-Uk;Choi, Myung-Sung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.7
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    • pp.425-433
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    • 2016
  • The construction of a light rail transit (LRT) system is a large and complex infrastructure project involving hundreds of billions of won in construction costs for a single route, and it is very important to carry out such a project from a life-cycle perspective because of its long-term operation. Systems engineering is a means and methodology to successfully implement customers' needs, and it is useful in large projects such as light rail transit. An application model called Systems Engineering for Light Rail Transit (SELRT) was developed to support systems engineering activities in light rail transit projects. In order to utilize SELRT, it is necessary to ensure that system requirements are met. As such, in this paper, we present a verification procedure and architecture based on a systems engineering-based methodology, thereby identifying the system requirements and deriving the verification requirements to confirm the SELRT model for the proposed method. The results show that the traceability of the system requirements and verification requirements, the verification method for each requirement, and the demonstration results for computerized tools are mutually connected, and that the initial requirements are clearly implemented in the SELRT. The proposed method is valid for verifying the SELRT, which can also be utilized in a LRT project.