• Journal of the Korean Society for Railway
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• v.14 no.1
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• pp.11-18
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• 2011

This paper proposed a new 2-D multi-body dynamic modeling technique to analyze overriding behaviors taking place during train collision. This dynamic model is composed of nonlinear springs, dampers and masses by considering the deformable characteristics of carbodies as well as energy absorbing structures and components. By solving this dynamic model for rollingstock, energy absorbing capacities of collision elements, accelerations of passenger sections, impact forces applied to interconnecting devices, and overriding displacements can be well estimated. For a case study, we chose KHST (Korean High Speed Train), obtained crush characteristic data of each carbody section from 3-D finite element analysis, and established a 2-D multi-body dynamic model. This 2-D dynamic model was simulated under the train-to-train collision scenarios, and evaluated with 3-D virtual testing model. It was founded from the simulation results that this 2-D dynamic model could well predict overriding behaviors, and the modeling technique of carbody deformation was very important in overriding estimation.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1479-1481
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• 2007

It is important to evaluate the power quality at a substation when a test train is running. Especially, the Korea Electric Power Company(KEPCO) restrict the power quality generated from the electrical train within limited value. So, this paper represents the results of the power quality test when Hanvit 350 is running at the KTX high speed line and the assessment.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1444-1448
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• 2004

The railway electromagnetic environment is much more severe than that found in commercial and domestic environments. However, in many instances the railway runs very close to such environments. Tn this paper we measure the strength of electromagnetic fields for Korean High Speed Train Prototype and compare that with the past result and evaluate the result according to domestic and international guideline.

• Proceedings of the KSR Conference
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• 2005.11a
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• pp.59-64
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• 2005

The railway electrical environment is much more severe than that found in commercial and domestic environments. However, in many instances the railway runs very close to such environments. In this paper we measure the harmonic, the strength of electromagnetic fields and the consumption energy for Korean High Speed Train and compare that with the past result and evaluate the result according to domestic and international guideline.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2007.11a
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• pp.169-173
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• 2007

To improve the riding comfort and to increase the speed of high-speed railway, it needs active suspension system for railway more and more. In Korea, Korean Train Express (KTX) was opened to commercial traffic 3years ago. Korea High-speed Railway (HSR 350x) was developed and succeeded 350km/h test run by Korean government and several related institute. With the increase of the speed, the vibration control of the high-speed railway becomes important to improve high ride quality. To meet this request, the authors suggest the installation of lateral semi-active damper to the power car of HSR 350x. The result shows better performance.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.974-978
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• 2006

To improve the riding comfort and to increase the speed of high-speed railway, it needs active suspension system for railway more and more. In Korea, Korean Train Express (KTX) was opened to commercial traffic 2years ago. Korea High-speed Railway (HSR 350x) is being developed and succeeded 350km/h test run. With the increase of the speed, the vibration control of the high-speed railway becomes important to meet high ride quality. In this paper, we suggest the install of lateral damper to HSR 350x. The result shows better ride quality.

• Proceedings of the KSR Conference
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• 2000.05a
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• pp.300-307
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• 2000

현재 KERI의 고속전철 T.F.T.는 최고속도 350kph를 목표로 하는 한국형 고속전철 개발과제에 참여하고 있다. KERI의 연구분야는 전기시스템 엔지니어링으로, 열차의 전기 및 기계시스템의 진단 및 제어를 수행하는 차상컴퓨터시스템의 엔지니어링 설계를 포함하고 있다. 본 설계는 승객의 안전과 제작 운전, 유지보수 단계에서의 경제성 확보라는 측면에 시스템 엔지니어링 개념을 두고 있다. 본 논문에서는 한국형 고속전철(KHST)의 안전성과 신뢰성을 책임지는 차상컴퓨터시스템의 엔지니어링 설계안을 제시한다. 본 설계안은 네트웍을 통한 분산처리시스템에 초점을 맞추고 있다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1786_1787
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• 2009

철도는 안전성, 신뢰성, 에너지절약 등 여러 가지 측면에서 다른 교통수단과 비교하여 여러 장점을 가지고 있기 때문에 많은 나라에서 각광을 받아 왔다. 최근 들어서는 고속열차 뿐만 아니라 기존선을 고속으로 주행하기 위한 연구도 활발하게 수행되고 있다. 이 논문에서는 독자 기술로 개발된 한국형 틸팅열차에 탑재되어 있는 틸팅시스템에 대한 성능평가를 수행한 결과에 대하여 살펴보았다.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1589-1591
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• 2005

현재 기존선에 설치되어 있는 ATS 지상신호시스템은 고속화에 어려움이 있으며 만약 열차운행속도 180km/h급 틸팅차량이 안전하게 운행하고자 한다면, 첨단기술을 이용한 차상신호시스템이 도입이 필요하다. 지상신호시스템의 고속화 적용에 가장 큰 장애 요인으로 작용하는 기관사 시인성 연구 결과에서도 열차 운행속도 160km/h 까지는 가능하나 그 이상의 속도에서는 기관사의 피로도 및 오동작 확률이 높아지므로 기존선 고속화를 위해 신호시스템을 차상신호 시스템으로 개량하는 것이 적합한 것으로 알려져 있다. 본 논문은 최고운행속도 180km/h급 틸팅차량 TTX(Tilting Train eXpress)에 적합한 차상신호장치의 기본설계방안을 제시한다.

• Journal of the Korean Society for Railway
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• v.17 no.3
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• pp.165-170
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• 2014

The resistance to motion of the Korean next-generation high-speed train (HEUM-430X) was assessed on the basis of 12 coasting test runs at coasting speeds up to approximately 380km/h. Two different methods, a linear regression method and a time-integral method, were employed to calculate decelerations from the time-velocity data and the time-distance data, respectively, and an equation of resistance to motion was devised from the deceleration data calculated at each time section. The effect of an improvement of the aerodynamic shape on the resistance to motion was investigated, with the results showing that the running resistance was reduced by about 15% due to these improvements. An increase of approximately 28% of the running resistance was also noted when running in a tunnel relative to running through an open field.