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도시철도차량 신뢰도/가용도 관리시스템 개발을 위한 기능정의 연구
박기준(Kee-Jun Park),정종덕(Jong-Duck Chung),이영훈(Young-Hoon Lee),한석윤(Seok-Youn Han),서명원(Myung-Won Su) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
장기간 수명주기(Life Cycle)을 갖는 도시철도차량은 초기 도입비용보다 유지보수비용이 많은 비중(70%~80%)을 점유하고 있으므로 효율적인 유지보수 연구를 통하여 유지보수 비용의 절감과 대형시스템의 수명 연장을 추구하는 일이 무엇보다 시급하다. 이를 위해 신뢰성기반의 유지보수체계에 대해 여러 산업분야의 국내?외 사례 조사?분석을 통해 도시철도차량 신뢰도/가용도 관리시스템을 구성하였다. 본 연구에서는 이 시스템이 가져야할 주요 기능을 상세히 정함으로서 성공적인 시스템 개발이 될 수 있도록 하였다. It is very important that reduce the maintenance cost and extend life time of the urban transit EMU through effective maintenance method research. The maintenance cost of the urban transit EMU shares 70%~80% of it's life cycle cost. It means that the maintenance cost is bigger than the introduction cost of the urban transit EMU. We were survey and analysis for the reliability centered maintenance system of internal and external many industry parts. And we composed the reliability/availability management system of the urban transit EMU' maintenance. In this study, in order to success the system development, we decided the major functions of reliability/availability management system of the urban transit EMU' maintenance.
철도 차량 전두부 충돌 피해 저감을 위한 Protective shell frame의 위상 최적화에 관한 연구
김현준(Kim Hyun-Jun),김세훈(Kim Se-Hoon),정현승(Jung Hyun-Seung),권태수(Kwon Tae-Su Suh),서명원(Suh Myung-Won) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The leading-cab (high energy absorption area) of rolling stock directly is impacted on the frontal crash unlike other cabs. Thus, leading-cab has a structurally complex shape to solve getting concentrated loads. However, in order to enhance structural performance and to achieve the weight reduction of cab, changing the sizes and adjusting the distance of members do not take an effective result. Therefore, in design phase, to find the material arrangement which helps structural capacity be better should be done. This research applies the topology optimization to concept design of protective shell frame on strategy of crush energy absorption with considering pressure and vertical loads acting on the principal part of leading-cab. In this research, topology optimization method focuses on structural design, and which yields optimal material arrangement under given loads and boundary conditions using density method which has the density of material as design variables. Finally, this research presents optimal material arrangement and structure of protective shell frame on given loads with applying topology optimization.