• 한국자동차공학회논문집
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• 제16권6호
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• pp.157-167
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• 2008

Through this study, the standard design guidelines for high speed train with power cars have been derived to meet the crashworthiness requirements of the Korean rollingstock safety regulation. The crashworthiness regulation requires some performance requirements for two heavy collision accident scenarios; a train-to-train collision at the relative speed of 36 kph, and a collision against a standard deformable obstacle of 15 ton at 110 kph. A standard high speed train composition was defined as 2PC-2ET-6T with 17ton axle load, similar to KTX-2 for the Honam express line. Using theoretical and numerical analyses, some crashworthy design guidelines were derived in terms of mean crush forces and energy absorptions for major crushable components. The derived design guidelines were evaluated and improved using one dimensional spring-mass dynamic simulation. It is shown from the simulation results that the suggested design guidelines can easily satisfy the domestic crashworthiness requirements.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.164-169
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• 2006

A high-speed rail system represents a typical example of large-scale multi-disciplinary systems, consisting of subsystems such as train, electrical hardware, electronics, control, information, communication, civil technology etc. The system design and acquisition data of the large-scale system must be the subject under strict configuration control and management. This paper presents the results from systems engineering application to High Speed Rollingstock 350 eXperimental for management of test and evaluation.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집 특별세미나,특별/일반세션
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• pp.491-495
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• 2009

This study aims to develope a numerical model of the huge obstacle defined in the Korean Rollingstock Safety Regulations. The shape and mechanical properties to be satisfied in the numerical model were based on the Regulations. Through a troublesome trial and error simulations, we developed the numerical model of the huge obstacle to satisfy physical properties of the specified guideline in the regulations. By applying the developed numerical obstacle, we carried out a crash simulation to evaluate vehicle crashworthiness.

• 시스템엔지니어링워크숍
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• 통권6호
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• pp.13-16
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• 2005

• 한국철도학회논문집
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• 제13권2호
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• pp.139-146
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• 2010

본 연구에서는 복잡한 3차원 유한요소모델 충돌거동과 등가인 1차원 동역학 모델링 방법을 개발하기 위하여 새로운 1-D 모델링 방법을 제안하였다. 충돌 거동을 잘 일치시키기 위해서는 충돌 시너지를 주로 흡수하는 압괴 구간의 특성을 정확하게 모델링하는 것이 중요하다. KHST 편성차량을 대상으로 3차원 유한요소 모델의 차체단면에 설정한 단면 옵션으로 충돌해석 시 차체 단면에 작용하는 충격하중과 변형을 추출하여 새로운 1차원 충돌동역학 모델의 스프링요소 특성으로 모델링하고, 국내철도차량 안전기준의 열차 대 열차 충돌사고 각본으로 수치해석을 수행하였다. 두 모델의 에너지 흡수량, 충돌 가속도, 충격하중-변형 등을 비교한 결과가 잘 일치하였다.

• 한국철도학회논문집
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• 제11권3호
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• pp.300-310
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• 2008

본 논문에서는 국내철도차량안전기준의 충돌안전 요구사항을 만족하는 동력 분산형 고속전철의 충돌안전도 개념설계에 대하여 연구하였다. 국내안전기준에는 36km/h 열차 대 열차 충돌, 15ton 변형체 장애물과 110km/h 충돌 등 2가지 중충돌 사고에 대한 충돌안전성능을 요구한다. 한국형 분산형 차세대고속열차는 17ton 축중의 동력집중형 KTX와 달리 13ton 축중을 가지는 2TC-6M로 구성된다. 이론적 수치적 해석을 통하여 주요 압괴구조 및 부품의 평균압괴하중과 변형량을 에너지 흡수 관점에서 충돌안전도 개념설계안으로 도출하였다. 도출된 개념 설계안은 1차원 막대-스프링-댐퍼-질량 동역학 시뮬레이션 결과로부터 국내 충돌안전기준을 잘 만족시킬 수 있음을 보였다.

• 한국철도학회논문집
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• 제14권1호
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• pp.11-18
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• 2011

본 논문은 열차의 타고오름 해석을 위한 새로운 2차원 다물체 동역학 모델링 방법을 제안하였다. 본 동역학 모델은 에너지 흡수구조/부품뿐만 아니라 차체의 변형도 고려하여 비선형 스프링, 댐퍼, 질량으로 구성되며 철도차량의 충돌에너지흡수량, 승객구간의 가속도, 연결 장치의 충격력, 차량간 타고오름 변위 등을 잘 예측할 수 있다. 제안된 방법으로 한국형고속열차를 차체 각 부분의 압괴 특성을 구하고 2차원 다물체 충돌동역학 모델을 구성하였다. 열차 대 열차 충돌 시나리오조건으로 2차원 동역학 모델을 시뮬레이션하고 3차원 가상시험 모델로 평가하였다. 그 결과 2차원 동역학 모델은 타고오름 거동을 잘 예측하였으며 차체변형을 고려한 모델링 기법이 타고오름 평가에 중요함을 확인하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.604-608
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• 2010

This paper proposed a new 2D multibody dynamic modeling technique to analyze overriding behavior taking place during train collision. This dynamic model is composed of nonlinear spring, damper and mass by considering the deformable characteristics of carbodies as well as energy absorbing structures and components. By solving this dynamic model of rollingstock, collision energy absorption capacity, acceleration of passenger sections, impact forces applied to interconnecting devices, and overriding displacements can be well estimated. For a case study, we choose KHST (Korean High Speed Train), obtained crush characteristic data of each carbody section from 3D finite element analysis, and established a 2D multibody dynamic model. This 2D dynamic model was suggested to describe the collision behavior of 3D Virtual Testing Model.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.772-779
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• 2008

Through this study, standard design guidelines for the high speed EMU have been derived to meet the crashworthiness requirements of the Korean rollingstock safety regulation. The crashworthiness regulation requires some performance requirements for two heavy collision accident scenarios; a train-to-train collision at the relative speed of 36 kph, and a collision against a standard deformable obstacle of 15 ton at 110 kph. The complete train set will be composed of 2TC-6M with 13 ton axle load, different from KTX with the power car of 17 ton axle load. Using theoretical and numerical analyses, some crashworthy design guidelines were derived in terms of mean crush forces and energy absorptions for main crushable structures and devices. The derived design guidelines were evaluated and improved using one dimensional spring-mass dynamic simulations. It is shown from the simulation results that the suggested design guidelines can easily satisfy the domestic crashworthiness requirements.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1574-1586
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• 2008

Railway is the most effective transportation than any other traffic. But due to the its expensive maintenance fee and various components like roadbed, rail, rollingstock, electric and signal etc, the construction cost of the railway is usually higher than highway. Such a reason, a lot of cost and period are needed to complete the railway project. In addition that considering the decreasing of the SOC budget, the investment in the railway industry is getting hard than ever. This study analyzed the cost, term of work, freight & passenger transportation demand of the wide area railway electrification project and main line improvement project. And it compared the estimation value and real value of the projects like cost and period etc. And this study surveyed the economic feasibility including factors which are not considered in the feasibility study guide. With those results, This study suggest the project management and evaluation method to enlarge the efficiency of the railway construction project.