• 한국가스학회지
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• 제4권4호
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• pp.65-70
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• 2000

본 연구에서는 국내 안전문화의 향상과 가스 관련 사고의 재발을 방지할 수 있으며, 사고 원인 분석의 원활한 수행을 도모할 수 있도록 기술적 지원을 할 수 있는 $\lceil$가스 사고 근본 원인 해석 시스템$\rfloor$을 개발하였다. 본 연구에서 개발한 프로그램은 가스산고 조사시사고원인을 체계적으로 분석할 수 있도록 사고사례를 분석하여 사고원인 데이터베이스를 구축하였으며, If${\~}$Then Rule을 적용하여 사고의 1차 원인을 찾을 수 있게 하였다. 이때 사고 발생장소, 사고 형태, 사고시 운전 상황, 사고 가스, 사고 발생 기계장치 및 구성요소들을 유기적으로 연결하여 도출되는 1차 원인의 수를 줄이도록 하였다. 또한, 인적 오류, 장치 결함, 외부 요인을 시작점으로 하여 5단계의 질의를 통하여 근본 원인을 찾아갈 수 있도록 하는 Root Cause Analysis Map을 구축하였다.

• International journal of advanced smart convergence
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• 제9권4호
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• pp.1-7
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• 2020

This study is a study on the development of AEBS test scenarios for traffic accidents in Korea, and was compared and analyzed using the Traffic Accident Analysis Program. To ensure the safety of passengers and pedestrians in traffic accidents, the number of cars equipped with ADAS is increasing rapidly at all car manufacturers in each country. For traffic accidents used in this study, the domestic traffic accident database (ACCC) produced by SAMSONG was used. Domestic traffic accidents differ from overseas traffic accidents in terms of road type, signal system, driver's seat location and number of vehicles. ACCC databases, which supplemented and reinforced these differences, built a database based on the PC-CRASH program. In the study, we analyze the types of accidents to develop comparative scenarios for each type of road and collision type of traffic accidents. When the road types of traffic accidents in Korea were divided into five types and the collision types were divided into six, it was confirmed that the most types of FRONT-SIDE crashes appeared at the intersection. It is expected that the frequency of possible traffic accidents and collision types can be predicted according to the road type in the accident database, we that it can be used as an AEBS test scenario development suitable for the domestic road environment.

• 한국가스학회지
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• 제22권5호
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• pp.107-113
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• 2018

사고 데이터는 사고의 경각심을 보여주거나 유사사례를 검토 할 때 활용되기는 하나 사고 데이터 본질에 대한 분석이나 사고와 주변 환경요소와의 연관성에 대한 분석은 굉장히 미흡하다. 따라서 사고와 연관된 데이터와 함께 분석하는 기법을 개발하여 특정 지역에 대한 사고 가능성을 제시하는 것이 대단히 필요하다. 본 연구는 과거 기상정보 데이터와 사고 및 신고 데이터를 기반으로 지역별 사고 가능성을 산출하는 분석 모델 개발하고 시스템을 구현하는 것을 목적으로 한다. 한국의 다수 지역에 대해 기상과 사고간의 개연성을 토대로 선택적 사용자 환경변수가 적용된 k-NN 과 의사결정트리 알고리즘 모델이 생성되도록 시스템을 설계하고 개발한다. 향후, 본 연구에서 개발된 모델은 좀 더 협소한 지역의 위험도를 분석하고 산출하는데 사용할 계획이다.

• 한국자동차공학회논문집
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• 제9권1호
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• pp.171-180
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• 2001

Collision accident reconstruction algorithm are developed based on the deformation shape and severity of a car body. At first, the body stiffness equation representing the force-deformation relationship is derived using finite element analysis for head on collision of two cars. The database of deformation shapes and energies is constructed for five different collision configurations; each configuration contains three velocity conditions. Deformation shapes are obtained using a curve fitting method and result in cubic polynomials. Deformation energies are calculated using a stiffness equation and deformation data. Three algorithms are developed to reconstruct collision configuration compared with constructed database. The developed algorithms show reasonably good performance to find collisions conditions for some test problems.

• 자동차안전학회지
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• 제11권1호
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• pp.30-35
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• 2019

KIDAS (Korean In-Depth Accident Study) is a data structure of accident investigation type, vehicle breakage and human injury database. A consortium of research institutes, universities, and medical institutions has been established and operated. KIDAS has the strongest difference from the TAAS (Traffic Accident Analysis System), which is the data of the National Police Agency, that it can grasp the injury information of passengers. In this study, the mean age and weight of the most frequent accident types in the KIDAS accident statistics were calculated to determine the degree of injury according to gender. Through the MADYMO analysis, it is aimed to grasp the difference of dummy injury using commercial dummy models and scaling models are currently used.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.1412-1425
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• 2009

This paper suggests to standardize railway accident restoration types as the standardized code and to develop standard operation procedures(SOP) for the efficient railway accident management and recovery system. First of all, occurred damage types as the existing railway accident types in both domestic and foreign cases have been carefully analyzed and then reclassified. Therefore, this study suggested the combination of 3 distinct code factors: restoration class, restoration object, and restoration location to standardize them. In addition, temporary restoration SOP will play a major role in the railway accident database management system and SOP for the damage limitation and the prevention of accident spread.

• 한국자동차공학회논문집
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• 제16권1호
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• pp.52-63
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• 2008

The side collision reconstruction algorithm is developed using three dimensional car crash analysis. Medium size passenger car is modeled for finite element analysis. Total 24 side collision configurations, four different speed and six different angle, are set up for making side collision database. Deformation index and degree index are built up for each collision case. Deformation index is a kind of deformation estimate averaging displacement of side door of crashed car from finite element analysis result. Angle index is constructed measuring deformed angle of crashing car. There are two kinds of angle index, one is measured at driver's side and the other is measured at passenger's side. Also a collision analysis information in side of cars is used for giving a basis for scientific and practical reason in a reconstruction of the car accident. The analysis program, LS-DYNA3D is utilized for finite element analysis program for a collision analysis. Those database are used for side collision reconstruction. Side collision reconstruction algorithm is developed, and applied to find the collision conditions before the accident occurs. Three example collision cases are tried to check the effectiveness of the algorithm. Deformation index and angle index is extracted for the case from the analysis result. Deformation index is compared to the established database, and estimated collision speed and angle are introduced by interpolation function. Angle index is used to select a specific collision condition from the several available conditions. The collision condition found by reconstruction algorithm shows good match with original condition within 10% error for speed and angle. As a result, the calculation from the reconstruction of the situation is reproducing the situation well. The performance in this study can be used in many ways for practical field using deformation index and degree index. Other different collision situations may be set up for extending the scope of this study in the future.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 1997년도 특별강연 및 춘계학술발표 개요집
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• pp.116-118
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• 1997

• Nuclear Engineering and Technology
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• 제49권7호
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• pp.1537-1546
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• 2017

Many thermal-hydraulic tests have been conducted at the Korea Atomic Energy Research Institute for verification of the SMART (System-integrated Modular Advanced ReacTor) design, the standard design approval of which was issued by the Korean regulatory body. In this paper, the contributions of these tests to the standard design approval of SMART are discussed. First, an integral effect test facility named VISTA-ITL (Experimental Verification by Integral Simulation of Transients and Accidents-Integral Test Loop) has been utilized to assess the TASS/SMR-S (Transient and Set-point Simulation/Small and Medium) safety analysis code and confirm its conservatism, to support standard design approval, and to construct a database for the SMART design optimization. In addition, many separate effect tests have been performed. The reactor internal flow test has been conducted using the SCOP (SMART COre flow distribution and Pressure drop test) facility to evaluate the reactor internal flow and pressure distributions. An ECC (Emergency Core Coolant) performance test has been carried out using the SWAT (SMART ECC Water Asymmetric Two-phase choking test) facility to evaluate the safety injection performance and to validate the thermal-hydraulic model used in the safety analysis code. The Freon CHF (Critical Heat Flux) test has been performed using the FTHEL (Freon Thermal Hydraulic Experimental Loop) facility to construct a database from the $5{\times}5$ rod bundle Freon CHF tests and to evaluate the DNBR (Departure from Nucleate Boiling Ratio) model in the safety analysis and core design codes. These test results were used for standard design approval of SMART to verify its design bases, design tools, and analysis methodology.

• 한국가스학회지
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• 제14권1호
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• pp.28-36
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• 2010

본 연구에서는 1995년부터 2006년까지 12년간 발생한 3,593건의 가스사고사례를 수집하여 데이터베이스를 구축하였으며, 이를 근거로 LPG 기화기사고의 발생건수를 형태 및 원인별로 분석하였다. 분석결과를 살펴보면 사고의 형태로는 파열, 누출, 폭발, 화재 순으로 발생하는 것으로 나타났으며, 기화기 가스사고 중 세부원인을 분석한 결과 가장 많이 발생한 원인으로는 액유출방지장치의 결함에 의한 것으로 분석되었다. 또한 Poisson분석법을 적용하여 향후 5년 이내에 LPG 기화기와 관련된 화재, 폭발, 누출, 파열에 대한 가장 가능성이 높은 발생확률을 예측하였다. 그 결과 사고의 발생횟수가 3번 이하로 발생하는 항목으로는 LPG-Vaporizer-Fire으로 나타났으며, 5번 이하는 LPG-Vaporizer -Products Faults-Check Floater, 10번 이하는 LPG-Vaporizer-Products Faults로 분석되었다. 향후 본 연구에서 구축한 국내사고 Database를 매년 지속적으로 보완 개정을 하면 국내 가스사고 예측에 대한 보다 신뢰성 있는 정보를 제공해 줄 수 있어 효과적인 가스안전관리 대책수립에 기여할 것으로 기대된다.