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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.
박경창(Kyoungchang Park),하홍기(Hongki Ha),이장욱(Jahngwook Lee),박근수(Geunsu Park),우관제(Kwanje Woo) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Obstacle deflector is a device to protect the train from obstacles laid on the track which is installed at the extreme end of the underframe of the car. This is the device related to the safety during crash event and its strength and energy absorbing requirements are recommended in various standards such as Korean Railway Safety Act, EN15227 and GM/RT2100. Although there are some differences among the standards, the basic concepts are similar. The deflector should endure the impact force without permanent deformation, and if the forces over the strength limit are applied, deflector has to absorb energy by push back mechanism maintaining proper reaction force. Therefore the evaluation of the deflector needs to be verified by the large deformation non-linear analysis as well as the linear analysis. This paper describes the FEA process and results of a deflector which is designed according to GM/RT2100 and EN15227 standards.
포스터 발표 : 포스터 연제 ; 준임상성(subclinical) 전신성홍반성낭창 임신부 신증후군환자에서 확인된 IgA 신병증 1예
박경창 ( Park Gyeong Chang ),이은규 ( Lee Eun Gyu ),박규용 ( Park Gyu Yong ),구자룡 ( Gu Ja Lyong ),김근호 ( Kim Geun Ho ),전로원 ( Jeon Lo Won ),김형직 ( Kim Hyeong Jig ),채동완 ( Chae Dong Wan ),노정우 ( No Jeong U ),남은숙 ( Na 대한신장학회 1999 춘계학술대회 초록집 Vol.18 No.2
박경창(Park Kyoumg-Chang),정지호(Jeong Ji-Ho),이장욱(Lee Jahng-Wook),박근수(Park Geun-Soo),우관제(Woo Kwan-Je) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Hyundai-Rotem Company has designed and manufactured Light Railway Vehicle (LRV) according to the Urban Rail Transit Code, which applies to urban railway vehicles in Korea. The Urban Rail Transit Code specifies the loads, for which vehicle bodies shall be capable of withstanding, identifies how material data shall be used and presents the principles to be used for design verification by analysis and test. The structural design of railway vehicle bodies depends on the loads they are subjected to and the characteristics of the materials they are manufactured from. Therefore Hyundai-Rotem Company has carried out Finite Element Analysis (FEA) and has performed load tests on the vehicle body according to the Urban Rail Transit Code. This research contains the results obtained by the analysis and the load tests. The analysis was carried out using I-DEAS Master Series 12 and load test were carried out using specially designed test jigs and equipment are used for the load tests.
박경창(Kyung-Chang Park),김한벼리(Hanbyeori Kim),이상진(Sang-Jin Lee),김승열(Seungyoul Kim),박래현(Raehyeon Park),김용대(Yongdae Kim),유영갑(Younggap You) 大韓電子工學會 2009 電子工學會論文誌-TC (Telecommunications) Vol.46 No.11
This paper presents a tag emulator for a UHF band RFID system. The tag emulator supports the 1800-6C and EPC global class 1 generation 2 standards. The transmitted signal from a reader is generated using the PIE coding and ASK modulation methods. Signals of a tag are from the FM0 coding and ASK modulation methods. The ARM7 processor carries out the overall control of the system and signal analysis of incoming data. The verification of the tag emulator employs the application platform implemented in C++. Users can define parameter values for protocol during the application run. The tag emulator presented in this paper allows evaluating various design alternatives of the target RFID system in real applications. 본 논문은 UHF 대역 RFID 시스템의 태그 에뮬레이터를 제안한다. 태그 에뮬레이터는 18000-6C와 EPC global class 1 generation 2 표준을 지원한다. 리더로부터의 송신신호는 PIE 부호화 방식과 ASK 변조방식을 사용하였으며, 태그로부터의 송신신호는 FM0 부호화 방식과 ASK 변조방식을 사용하였다. 송?수신 신호 전달에 대한 처리는 상용 송?수신 칩을 사용한다. 태그 에뮬레이터의 전체 제어와 신호 해석 및 처리는 ARM7 프로세서가 담당한다. 태그 에뮬레이터의 기능 검증은 구현된 C++ 기반의 어플리케이션을 통해 하였다. 프로토콜에 따른 각 파라미터 값은 어플리케이션에서 사용자가 지정하여 검증할 수 있다. 본 논문에서 제안된 태그 에뮬레이터는 여러 가지 설계가능성을 실제적인 환경에서 쉽고 빠르게 평가할 수 있도록 한다.
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.