• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.894-899
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• 2000

Optimization of 26 design variables selected from suspension characteristics for Korean High Speed Train (KHST) is performed according to the minimization of 58 responses which represent running safety and ride comfort for KHST and analyzed by using the each response surface model from stochastic design experiments. Sensitivity of design variables is also analyzed through the response surface model which ineffective design prameters to the performance index are screened by using stepwise regression method. The response surface models are used for optimizing design variables through simplex algorism. Values of performance index simulated by optimized design parameters are totally lower than those by initial design parameters. It shows that this method is effective for optimizing multi-design variables to multi-object function.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 Techno-Fair 및 추계학술대회 논문집 전기물성,응용부문
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• pp.206-207
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• 2007

We developed a measurement system for on-line test and evaluation of performances of KHST. The measurement system is composed of software part and hardware part. Perfect interface between multi-users is possible. A new method to measure temperature was applied to the measurement system. By using the system, fault diagnosis and performance evaluation of electric equipment in Korean High Speed Train was conducted during test running.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 추계학술대회 논문집
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• pp.267-272
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• 2001

A FEM-based analytical approach was used to evaluate the static strength and the fatigue strength of a KHST bogie including eddy current brake system. Calculation was carried out in the fields of linearity and small deformation. The yield strengths were used as criteria for evaluating the static strength and the fatigue limits were used as criteria for evaluating the fatigue strength. The analysis results show that there is not any location that exceeds the allowable criteria.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 춘계학술대회 논문집
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• pp.222-229
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• 2001

This paper aims to verify the static strength of a KHST gangway structure including fixed ring and carrying ring according to tile load cases in the defined specification. The structure has been analyzed by the finite element method. Calculation carried out in tile fields of linearity and small deformation. The admissible limit is tile yield strength for the available materials. The analysis results show that Von-Mises stress at some locations of the structure is a little beyond the admissible limit. These results are successfully reflected on the adjusted design.

• 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 2007년도 춘계학술대회 논문집
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• pp.1729-1734
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• 2007

Recently, as the feasibility study shows that trans-Korea railway and trans-continental railway are advantageous, interest in high-speed railway system is increasing. Because railway vehicle is environment-friendly and safe compared with airplane and ship, its market-sharing increases gradually. We developed a measurement system for on-line test and evaluation of performances of KHST. The measurement system is composed of software part and hardware part. Perfect interface between multi-users is possible. Nowadays, position data inputs to pulse signal from wheel. Perfect position measurement was limited to slip and slide of vehicle. This measurement makes up for the weak points, Position Detection System using GPS develops. By using the system, Korean High Speed Train is capable of accurate fault position detection.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.589-594
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• 2004

In design of suspension system for KHST, it was applied the approximated optimization method using meta-models which called Response Surface Model and Neural Network Model for 29 design variables and 46 performance index. These models was coded using correlation between design variables and performance indices that is made by the 66 times iterative execution through the design of experimental table consisted orthogonal array L32 and D-Optimal design table. The results show that the optimization process is very efficient and simply applicable for complex mechanical system such as railway vehicle system. Also it was compared with the sensitivity of some design variables in order to know the characteristics of two models. This paper describes the general method for dynamic analysis and design process of railway vehicle system applied to KHST development, and proposed the efficient methods for vibration mode analysis process dealing with test data and the function based approximation method using meta-model applicable for a complex mechanical system. This method will be able to apply to the other railway vehicle system in oder to systematize and generalize the design process of railway vehicle dynamic system.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.948-954
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• 2004

이 연구의 목적은 호남선과 경부선의 기존선 전철화 선로의 곡선부에서 G7 개발차량과 KTX 차량의 속도를 증가해서 주행했을 경우 궤도구조의 성능평가와 주행안전성를 측정 분석한 것이다. 구조안전성과 주행안정성 평가를 위해서 측정기준으로 정립하였으며 계측망도를 구성하여 현장 계측을 수행하였다. 윤중, 횡압과 레일수직, 수평변위, 침목수직변위, 레일응력을 측정하였으며 이 결과를 토대로 궤도구조의 부담력과 열차 주행안정성을 평가하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.820-825
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• 2008

In the article 16 of the domestic rolling stock crashworthiness regulations, the collision acceleration level during collision accidents should remain under the maximum 7.5g and the average 5g. By the way, the accelerations obtained in crash simulations and tests contain many kinds of high frequency components due to numerical oscillations or noisy signals. So, this paper aims to develop reliable post-processing methods to filter high frequency oscillations and extract the rigid body motions of passenger rail cars. For this study we used the 1-dimensional dynamic model of KHST (Korean high-speed train), and evaluated acceleration data at the driver's area in the first power car and the passenger area in the following trailer.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 춘계학술대회 논문집
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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.