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박경창(Kyoung-Chang Park),조현직(Hyun-Jik Cho),이장욱(Jang-Wook Lee),박근수(Guen-Soo Park) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11
유럽에서 트램은 접근성 및 친환경성이 뛰어난 대표적인 교통수단이다. 트램은 전용 철로를 이용하는 일반 철도 차량과는 달리 다른 교통 수단 (버스, 승용차 및 화물차 등)과 교차되어 운용 되면서 기존의 철도 차량보다 높은 이용자 편의성을 가지고 있으나, 다른 교통 수단에 대한 충돌 사고 발생 확률이 높다. 본 논문은 국토해양부 개발사업을 통해 설계 및 제작된 무가선 저상트램을 대상으로 국외 충돌안전 기준인 EN15227 사양을 적용하여 충돌안전성능을 평가를 수행하였다. 충돌안전성능 평가에 사용된 충돌 시나리오는 정면충돌과 경사면의 소형장애물과의 충돌이다. 본 연구를 통해 국내에서 개발된 무가선 저상트램의 충돌안전성능은 EN15227의 설계기준에 만족함을 확인하였다. Tram is becoming one of the most popular means of transportation in Europe because of it"s advantage such as accessibility and eco-friendly. Meanwhile the trams are operated with other kinds of road transportations, the accident can be happened not only with itself but also with other road vehicles. Accordingly the crashworthiness design needs to be complied with recently released standard EN15227. This paper describes the crashworthiness assessment according to EN15227. There are two kinds of crash scenario and two kinds of criteria for each. The first scenario : A front-end colliding between two identical trams at 15km/h. The second scenario : A front colliding into a 3ton road-crossing obstacle placed on the railway at 25km/h with an incidence of 45 deg. Explicit FEA has been used for the evaluation.
알루미늄 튜브 하이드로포밍에서의 예비 굽힘 공정의 효과에 관한 연구
임희택(Lim Hee Taek),박경창(Park Kyoung Chang),김형종(Kim Hyung Jong),김헌영(Kim Heon Young) 강원대학교 산업기술연구소 2004 産業技術硏究 Vol.24 No.1
Recently social demands of fuel economy and environmental regulations require the development of lightweight components and new manufacturing technologies. The aluminum tube hydroforming is a manufacturing process which can provide lightweight components as automotive parts. In this paper, the hydroformability of aluminium tube in different condition of bending process is presented. An investigation has been conducted on how to control the deformed shape and its effect on thinning distribution after hydroforming by using finite element simulation. Finite element simulation of tube hydroforming for automotive trailing arm is carried out to explore the effect of 2-dimensional and 3-dimensional bending.
국내 철도차량안전법 요구 압괴 성능의 대형장애물 수치모델 개발
조현직(Cho Hyun-Jik),구정서(Koo Jeong-Seo),이장욱(Lee Jang-Wook),박경창(Park Kyoung-Chang),박근수(Park Geun-Soo) 한국철도학회 2009 한국철도학회 세미나자료 Vol.2009 No.5
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.
알루미늄 튜브 하이드로포밍에서의 예비 굽힘 공정의 효과에 관한 연구
임희택,박경창,김형종,김헌영 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B
Recently social demands of fuel economy and environmental regulations require the development of lightweight components and new manufacturing technologies. The aluminum tube hydroforming is a manufacturing process which can provide lightweight components as automotive parts. In this paper, the hydroformability of aluminium tube in different condition of bending process is presented. An investigation has been conducted on how to control the deformed shape and its effect on thinning distribution after hydroforming by using finite element simulation. Finite element simulation of tube hydroforming for automotive trailing arm is carried out to explore the effect of 2-dimensional and 3-dimensional bending.