• International Journal of Railway
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• v.2 no.1
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• pp.8-17
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• 2009

The wheelset, its functions and position under the train is the prime safety-critical component. Whether in design, qualification, manufacturing or maintenance, the wheels and axles have been the focus of special attention at SNCF for over 25 years and the French Railways are actively involved in various Research and Development work towards interoperability between the railways, railway reliability and running safety.

• Korean Institute of Interior Design Journal
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• no.17
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• pp.103-108
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• 1998

In contemporary architecture, "Function" should be required reconsideration and overall observation in architectural design. Especially, the architecture of the enterprise purely based on the increment of productivity and profits need to concern new implication of function in contemporary architectural design. The architectural strategy of three major European enterprise SNCF present its crucial role of architecture concernmg the presentation and enhancement of the company images. In the process of the numerous construction of the super fast train (T.G.Y) station, SNCF emphasis the technology of the company through the expression of High Tech in the building design. This study clearly explains new implication of function required in relations between the contemporary architecture and the enterprise. the enterprise.

• Proceedings of the KSR Conference
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• 2003.10a
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• pp.17-26
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• 2003

67% of TGV growth. 1/4 of TGV takings. 1/5 of TGV customers. 14, 1 Millions passengers (87% between Paris and Mediterranee)(omitted)

• International Journal of Railway
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• v.2 no.3
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• pp.107-112
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• 2009

Research projects of SNCF aim at reducing the costs of infrastructure possessions and improving the operational equipment availability and safety. This permanent search for a better regularity led the SNCF to analyse the maintenance approach of signalling equipment in detail. Until now, it was commonly acknowledged that signalling equipment, which consists of many electronic devices, is not subject to aging. In this study, a Weibull lifetime model, able to describe an aging phenomenon, is used and it can be shown that the deterioration is statistically significant. The validity of the model is tested. We also analyse the influence of environmental covariates. We simulate different scenarios in order to investigate the impact of several maintenance strategies as well as on future maintenance costs, on the amount of components to replace based on the mean age of the network. It can be shown that in most cases a systematic replacement strategy offers the best solution.

• Proceedings of the KSR Conference
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• 2000.11a
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• pp.636-651
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• 2000

In these days, SNCF replace the connector wire (M-T type) with a dropper has a equivalent role and function of the one in general lines of TGV, and change the connector wire (T-T-M-M-T-T, T-T-M-M-T type, etc) into a New one has more flexible cable in parallel lines (air section air joint, etc) of TGV. The Connector wire has many problems according to a flow of excessive circulation current (or traction current) and a sudden rise of temperature on catenary when electric locomotive is running in high speed. To solve the question at issue of the connector wire in high speed railway catenary system of Fiance, SNCF return their operating experience in TGV lines to design and execution of catenary system Therefore, we have to deal with the question in design and execution of catenary system for kyoungbu HSR line because we will spend a lot of time and more money for maintenance than for construction of that.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.922-929
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• 2005

본 논문은 TGV 개발을 중심으로 한 프랑스 철도정책 공동체의 정치, 사회, 경제적 배경과 정책결정자, 정책의 추진과정 및 설득과정을 분석함으로써 1960년대 이후 프랑스 공공정책 분야에서 급속하게 발달하게된 자유주의적 개혁을 설명함을 목표로 하고 있다. 프랑스 국영철도(SNCF)는 2차 대전이후 국민경제의 재건을 목표로 한 정부의 적극적인 지원하에 기술 및 생산성에서 세계적인 기록들을 수립했으나 민간부문의 교통수단들과의 경쟁에 직면해 경영의 어려움을 겪게 되었다. 이에 정부는 철도부문에 민간의 경영방식을 도입하고 적극적인 시장의 재탈환에 나서도록 이니셔티브를 부여함으로써 SNCF로 하여금 고속철도 기술을 개발하도록 이끌게 되었다. 나아가 이 과정에서 나타난 정책결정 구조와 정책의 설득과정에 대한 분석은 프랑스 철도정책 공동체의 특수성을 이해하게 해 줄 것이다.

• Proceedings of the Acoustical Society of Korea Conference
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• 1994.06a
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• pp.638-643
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• 1994

• International Journal of Railway
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• v.2 no.3
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• pp.99-106
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• 2009

Checks and tests before putting safety facilities into service as well as the results of these tests are essential, time consuming and may show great variations between each other. Economic constraints and the increasing complexity associated with the development of computerized tools tend to limit the capacity of the classic approval process (manual or automatic). A reduction of the validation cover rate could result in practice. This is not compatible with the French national plan to renew the interlocking systems of the national network. The method and the tool presented in this paper makes it possible to formally validate new computerized systems or evolutions of existing French interlocking systems with real-time functional interpreted Petri nets. The aim of our project is to provide SNCF with a method for the formal validation of French interlocking systems. A formal proof method by assertion, which is applicable to industrial automation equipment such as interlocking systems, and which covers equally the specification and its real software implementation, is presented in this paper. With the proposed method we completely verify that the system follows all safety properties at all times and does not show superfluous conditions: it replaces all the indoor checks (not the outdoor checks). The advantages expected are a significant reduction of testing time and of the related costs, an increase of the test coverage rate, an answer to the new demand of railway infrastructure maintenance engineering to modify and validate computerized interlocking systems. Formal methods mastery by infrastructure engineers are surely a key to prove that more safety is not necessarily more expensive.

• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.4
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• pp.693-700
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• 2024

This study aims to analyze the concept and application of AI-based predictive maintenance in the railroad industry and draw implications from it. Focusing on the adoption of AI-based maintenance systems by the Korea Railroad Corporation and Seoul Metro, we examined how AI technology can improve the efficiency and safety of railroad operations. We also compared and analyzed the application of AI technology in the European railroad industry through the cases of Deutsche Bahn in Germany and SNCF in France. The study found that AI-powered predictive maintenance contributes to reducing the frequency of breakdowns, reducing maintenance costs, and increasing the reliability of railroad operations.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.223-228
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• 2001

In this paper, crashworthiness of the KHST carbodies is evaluated by numerical simulation under the SNCF accident scenario (collision against a movable rigid mass of 15 ton at 110 kph) and the scenario of train-to-train collision at 30 kph. The numerical results of the several simulations, such as the accident collided against a deformable dump truck of 15 tons at 110 kph, the driver's dummy analysis using the integrated analysis method, and the accident of train-to-train collision for the first three units at 30 kph, show good performances in the viewpoint of energy absorption and survival space.