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열차종합제어장치(TCMS) 안전기능레벨(SIL#2) 인증과정 소개
한신(Shin Han),안대현(Dea-Hyun Ahn),신광균(Kwang-Kyun Shin),김재기(Jea-Gi Kim) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5
오늘날 철도 차량은 품질(Quality)의 향상과 함께 안전성 (Safety)의 문제가 대두된다. 안전성(Safety)은 최근에 국내 전동차 시행청에서 종종 요구되는 사항이지만, 제작된 시스템에 대해 정확한 “안전 하다”의 정의에 대해 누구도 쉽게 정의를 내리지 못한다. 따라서 국내외 시행청과 차량개발자는 안전인증 (SIL: Safety Integrate Level)이라는 방법을 통해 안전등급을 판단 한다. 이는 유럽에서 최초로 적용된 이래 국제규격에 등재된 (EN50128, EN50129 등) 방법을 따라 제 3 자로부터 인증을 받도록 되어 있다. 이러한 가운데 열차종합제어 장치에도 안전 무결성(SIL)을 요구하는 프로젝트가 많아지고 있다. 이에 현대로템은 국내 최초로 TCMS 전장품 장치의 SIL#2 인증 업무를 착수하였고, 각고의 노력 끝에 인증을 획득하였다, 이에 TCMS SIL#2 실질적인 인증과정을 소개한다. Now a days in train electric equipment enface on qualification also safely on software and hardware problems. qualification is very familiar with ISO9001 but safety dose not. But end user want to get certification about their equipment in safe issue. But end user and supplier dose not know what is safety system or non safety system. So they just request certification Level call SIL (Safety Integrated Level) on system. SIL is fist developed European area, now it be a international standard (EN61508, EN610509) now we are certified Safety Level #2 for TCMS system. So we informed overall process of certification TCMS system.
오현주(Hyun Joo Oh),신대용(Dea Yong Shin),이상건(Sang Gun Lee),김동현(Dong Hyun Kim),김찬중(Charn Jung Kim) 한국전산유체공학회 2012 한국전산유체공학회지 Vol.17 No.1
When a high-speed train passes an underground station, large pressure waves are generated due to the piston effect. These pressure waves can cause the problems of vibration and noise as well as the ear discomfort of passengers at the underground station. This work numerically analyzed the pressure wave generation and propagation in an high-speed railway underground station, and the optimal location for vent shafts was studied to improve the passenger comfort by reducing the magnitude of the pressure wave and its rate of change. The evolution of pressure field in the underground station was calculated using a CFD(Computational Fluid Dynamics) software(Fluent), where the axis-symmetric two-dimensional model verified by Wu was used. And this study is applied to modelling of the underground station and the tunnel from Daegok station A-line of GTX(Great Train Express). From the result, we can have a conclusion that the role of vent shafts respectively were different according to the position in and out the underground station. Also Vent shaft in the underground station widely reduced pressure magnitude. And vent shaft out underground station reduced initial pressure peak value. Double vent shafts installed at tunnel toward station entrance and inside of the tunnel are the most efficient to reduce pressure. and pressure reduction increases according to the number of vent shaft.
수직구 위치에 따른 대심도 지하정거장에서의 압력파에 대한 수치적 연구
오현주(Hyun Joo Oh),신대용(Dea Yong Shin),이상건(Sang Gun Lee),김동현(Dong Hyun Kim),김찬중(Charn Jung Kim) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.11
In this paper we deal with the study regarding numerical study of pressure wave in underground station with vent shaft position. When the high-speed train passes the underground station, it generates a large pressure wave, which causes the vibration with noise, according to the piston effect. It makes the noise problem with ear discomfortable of the passengers at the high-speed railway underground station. This work is presented the numerical analyzing of the pressure waves magnitude and tendency by the position of vent shaft in construction and environmental dimensions. We were installed the vent shaft in and out the underground station to reduce the pressure wave. We analyzed pressure field in the underground station by using axis two-dimensional simulation. We determined the boundary and CFD operating conditions by comparing the experimental data, which were submitted to Hong Kong university by Kwun hing, Wu, to verify the reliability. And we derived the results that we had been changing the position of vent shaft based on the model of the underground station and the tunnel from A line Daegok station of underground GTX. From the result, we can have a conclusion that the role of vent shaft respectively was different according to the position. Vent shaft in underground station reduced wide pressure field. And vent shaft out underground station reduced initial pressure peak value.
이종현,김석윤,신동혁,허정나,박대진,김용석 대한금속재료학회(대한금속학회) 1999 대한금속·재료학회지 Vol.37 No.7
In this study, an attempt was made to develop an in-situ processing method of Sn-Ag composite solders for the ball grid array in electronic packaging applications. The reinforcing phase(Cu_6Sn_5) was produced by the reaction between Sn in the matrix and Cu powders added. It was found that the shape and size of the phase formed are affected by the processing parameters such as holding time very sensitively. The mechanical properties and the thermal stability of the composite solders were proved to be superior to those of Sn-3.5 %Ag solder.
A Study of Relationship between Traditional Ondol System and Health Medical Science
June Bong Kim,Dea Ho Kang,Suk Jong Bea,Young Min Lim,Shin Hyun Cui,Eun Jeong Goh 국제온돌학회 2008 International Journal of Ondol Vol.3 No.1
This paper describes the traditional Ondol medical care, the specific combination of ancient and contemporary examples to be articulated. As a traditional Korean culture, to be extracted from the historical perspective, it described the relationship and origins between them, From a health perspective, in accordance with the logic and pharmacologyit introduced Ondol as the important principle of health care equipment. The modern architecture of some common harmful to the body, from the perspective of Ondol, it should be improved and based on scientific proof to the theory.