• Title/Summary/Keyword: railway freight

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Customer Stated Preference Analysis On Railroad Logistics Service by SP Method (SP기법을 이용한 철도물류서비스의 고객 선호도 분석)

  • Park Chan-Ik;Lee Jae-Won;Ryu Sung-Ryul;Kwon Yong-Jang;Yoo Jae-kyun
    • Proceedings of the KSR Conference
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    • 2005.05a
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    • pp.985-990
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    • 2005
  • The success of road transportation, in dominating the surface movement of freight, is now threatened by increased traffic congestion, falling average motorway speed and rising in logistics costs, oil price. Due to the necessity for an effective transport system, we need to improve domestic transport infrastructure to reduce logistics cost by shifting to rail system. To analysis the demand characteristics in advance against these hypothetical circumstances, Stated Preference, which is called SP, approaches have been adopted to analysis the shipper's mode choice behaviors as RP(Revealed Preference) approaches are not appropriate. The results also indicate that the most effective policy to divert the freight volume from road to railway is to reduce freight rates for the railway with improved reliability.

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An Application and Evaluation of Hub-and-spoke Strategy for Rail Freight Service in European Networks (철도화물서비스를 위한 Hub-and-spoke 운송전략의 적용과 평가: 유럽 사례를 중심으로)

  • 정승주
    • Journal of the Korean Society for Railway
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    • v.7 no.3
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    • pp.264-270
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    • 2004
  • The hub-and-spoke strategy is widely used in the field of transportation. At the field of rail transportation, however, it is difficult that we find an application case of this strategy because of modal characteristics. According to the fast growth of containerization and the development of transshipment technology, presently, the hub-and-spoke strategy is introduced by operators on actual European rail freight transportation. However, it is hardly to find empirical studies evaluating the applicability of transportation strategy. In this context, this study analyzed the applicabilities of hub-and-spoke strategy in the actual network of European rail freight. For the application and evaluation of the characteristics of hub-and-spoke strategy, it utilized a service network design model for rail freight. Utilizing this model, it analyzed the efficiency of furnished rail freight services, the potential locations of hubs, the characteristics of O-D flows by the types of trains and service links, and the types of paths of O-D flows. Finally, it proposed some implications and the further study topics.

Finite Element Analysis for Application of Torsion-free Brake Shoe Holder Hanger for the Bogie of Railway Freight Car (화차대차용 비틀림 흡수구조형 제륜자 홀더행거의 적용을 위한 유한요소해석)

  • Jeon Eung-Sik;Ham Young-Sam
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.36-41
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    • 2003
  • Among welded structure bogies in use for high speed freight car, a part of bogies manufactured in 1999 and 2000 have found problems that failure occurs in its end beam. In case of a freight car a difference of weight between empty and loading conditions are worse than in case of a passenger car. Moreover its brake system is tread brake without second suspension system. A failure of end beam is supposed to be due to loading by brake rather than vertical loading by freight. This failure can make brake system useless and may be a cause of derailment in the worst case. In this study, we have proposed a simple torsion-free brake shoe holder hanger to remove torsion of hanger bracket which is supposed to be one of causes of failure and performed finite element analyses for making trial manufactures and its application.

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Load history measurement of end beam of welded structure bogie for railway freight car (화차용 용접구조대차 엔드빔의 하중이력 측정)

  • Ham Young-Sam;Seo Jung-Won;Lee Dong-Hyong;Jeon Eung-Sik
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.103-108
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    • 2003
  • Among welded structure bogies in use for high speed freight car, a part of bogies manufactured in 1999 and 2000 have found problems that failure occurs in its end beam. In case of a freight car a difference of weight between empty and loading conditions are worse than in case of a passenger car. Moreover its brake system is tread brake without second suspension system. A failure of end beam is supposed to be due to loading by brake rather than vertical loading by freight. This failure can make brake system useless and may be a cause of derailment in the worst case. In this study, in order to be proved the cause of failure and to solve the problem it is described that we have measured load history acted on end beam and set up the procedures.

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Critical Speed of High Speed Freight Car with the Consideration of Vibration Modes (진동모드를 고려한 고속화차의 임계속도)

  • 이승일;최연선
    • Proceedings of the KSR Conference
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    • 2002.05a
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    • pp.437-445
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    • 2002
  • The development of railway vehicle and bogie involves the proper selection of design parameters not only to achieve high speed of the train but also to reduce the vibration. In this study, an analytical model of a high speed freight car is developed to find the critical speed. The high speed freight car can generate the snake motion of the lateral, rolling and yawing motion of the car body and the bogie. The numerical analysis for the equation motions with 17 degrees of freedom showed the running stability and the critical speed due to the snake motion. Also the vibration modes of the high speed freight car was calculated using ADAMS RAIL software, which showed that the critical speed have the yawing modes of the car body and the bogie.

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Analysis of the Snake motion of One High Speed Freight Car (고속화차 한량의 사행동 해석)

  • 이승일;최연선
    • Proceedings of the KSR Conference
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    • 2002.10a
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    • pp.193-201
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    • 2002
  • The development of railway vehicle and bogie involves the proper selection of design parameters not only to achieve high speed but also to reduce the vibration of the train. In this study an analytical model of a high speed freight car is developed to find the critical speed. The high speed freight car can generate the snake motion of the lateral and yawing motion of the car body, the bogie, and the wheelset. Numerical analysis for the nonlinear equation motions with 17 degrees of freedom showed the running stability and critical speed due to the snake motion. Also, the vibration modes of tile high speed freight car was calculated using ADAMS RAIL, which showed that the critical speed have the yawing modes of the car body and the bogie. Finally, this paper shows that the snake motion of the vehicle can be controlled with the modifications of the design parameters.

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Freight Operation System for Rail-Road Intermodal and Multimodal Transportation (철도 연계 및 복합운송을 위한 물류운영시스템)

  • 문대섭;정병현;조혜진
    • Proceedings of the KSR Conference
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    • 2002.10a
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    • pp.307-313
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    • 2002
  • Due to the fact that high speed railroad will be opened to traffic and TSR and TCR will be connected to Korean railroad network in near future, the efficient operation methods of Railroad freight transportation have been embossed as a matter of concern. But, it is true that the present level of our railway infrastructures and operation systems are still low. This study examines the freight transportation system and introduces new logistic service systems including network strategies and terminals which are haying developed overseas to increase the efficiency of existing railroad transportation system. In case of giving careful consideration to the new methods, it is expected that the high developed freight transportation systems will be applicable to our country.

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A Case study of Railway logistic Information system (철도 물류 정보시스템 사례연구)

  • Kim, Young-Hoon;Kim, Kyung-Hee
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.1390-1394
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    • 2009
  • In the paper We have analyzed the case study of the domestic and foreign railway logistic information systems based on the railway logistic to build the information architect basis system of real-time simultaneous. In case of domestic examples, We have analyzed the logistic information system used in Korea Railroad and the information systems of Kyungin ICD(Inland Container Depot) and Busanjin CY(Container Yard). In case of foreign example, we have analyzed the logistic information system of Japanese FRENS(Freight information network system) and the examples of freight tracking using RFID(Radio Frequency Identification). Through the above analysis, We have induced the main problems and improvement methods. We are able to build the railway-oriented information network system for the massive and efficient railway transportation.

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A Study on the Revitalization of Railway freight transportation Through forecasting of container volumes on Busan New & North port (신항과 북항의 철도물동량 예측에 따른 철도운송 활성화 방안에 관한 연구)

  • Cho, Sam-Hyun
    • Journal of Korea Port Economic Association
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    • v.25 no.4
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    • pp.131-146
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    • 2009
  • The purpose of this study is to predict the railway cargo volume on Busan new-port and north-port, in order to revitalize railway transport. This paper is organized as follows. Section 1 presents the description of the objective and methods on this study. Section 2 presents the status of Railway Cargo volumes and Construction plan of railway facilities in Busan New port. Section 3 presents the Forecast Railway Cargo volume using a volume ratio, actual volume records and another predicted datas. Section 4 summarizes our conclusions and further research topics. Especially, korea faces enforcement of green Logistics policy. Modal shift to trail freight transportation is one of ways, but there are no more detail plans. so it need that a cooperation system in government department, a indirect subside policy shift to rail freight transportation from trucking for revitalization of Railway Freight transportation.

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