http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
허남일(N.I. Her),김병철(B.C. Kim),김근홍(G.H. Kim),홍권희(G.H. Hong),사정우(J.W. Sa),김학근(H.K. Kim),김경민(K.M. Kim),박주식(J.S. Bak) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Vacuum vessel of the KSTAR(Korea Superconducting Tokamak Advanced Research) tokamak is a fully<br/> welded structure with D-shaped cross-section. According to the requirements of the physics design, sixteen<br/> horizontal ports, sixteen slanted ports, sixteen baking and cooling ports, and twenty-four top and bottom<br/> vertical ports are designed for the diagnostics, plasma heating, vacuum pumping, and baking and cooling.<br/> Bellows on these ports are used for flexible components to absorb the relative displacement due to the<br/> vacuum vessel thermal expansion and the electromagnetic force between the vacuum vessel and the cryostat<br/> ports. Fatigue strength evaluation was performed to decide the dimension of the bellows. In order to assure<br/> the quality of the bellows, a prototype bellows for the neutral beam injection port has been fabricated and<br/> tested prior to main fabrication. It was conformed that the prototype bellows has sufficient fatigue strength<br/> and vacuum reliability in the expected load conditions.
유전알고리즘을 이용한 비균일 하중을 받는 구조물의 지지 위치 최적화 연구
김근홍(G.H. Kim),이영신(Y.S. Lee),김학근(H.K. Kim),허남일(N.I. Her),사정우(J.W. Sa),양형렬(H.L. Yang),김병철(B.C. Kim),박주식(J.S. Bak) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
It is important to determine supporting locations for structural stability of a structure under non-uniform<br/> load in space interfered by other parts. In this case, There are many local optima with discontinuous design<br/> space. Therefore, The traditional optimization methods based on derivative are not suitable. Whereas, Genetic<br/> algorithm(GA) based on stochastic search technique is a very robust and general method. This paper has been<br/> presented to determine supporting locations of the vertical supports for reducing stress of the KSTAR(Korea<br/> super Superconducting Tokamak Advanced Research) IVCC(In-vessel control coil) under non-uniform<br/> electromagnetic load and space interfered by other parts using genetic algorithm. For this study, we develop a<br/> program combining finite element analysis with a genetic algorithm to perform structural analysis of IVCC. In<br/> addition, this paper presents a technique to perform optimization with FEM when design variables are trapped<br/> in an incongruent design space.
KSTAR 진공용기 및 플라즈마 대향 부품에 대한 베이킹 해석
이강희(K. H. Lee),임기학(K. H. Im),허남일(N. I. Her),인상렬(S. R. In),조승연(S. Y. Cho) 한국진공학회(ASCT) 1999 Applied Science and Convergence Technology Vol.8 No.4(1)
KSTAR (Korea Superconducting Tokamak Advanced Research) 토카막 핵융합 실험장치의 진공용기는 불순물이 적은 깨끗한 플라즈마 발생을 위해 기저압력이 초고진공(10^6~10^(-7)Pa)이어야 하며 이의 실현을 위해 진공용기 내부의 불순물을 제거할 목적으로 진공용기는 250℃, 각종 플라즈마 대향 부품들은 350℃까지 베이킹 될 필요성이 있다. 본 논문에서는 계획된 베이킹 시나리오에 준하여 필요 입열율을 산출해보고 이를 근거로 적절한 베이킹 계획을 정한 후 KSTAR 질소가스 유동 베이킹 시스템에 필요한 가스의 시간에 따른 온도와 유량을 산출하였다. The base pressure of the vacuum vessel of KSTAR tokamak is to be a ultra high vacuum, 10^6~10^(-7)Pa, to produce a clean plasma with low impurity concentrations. For this purpose, vessel and plasma facing components need to be baked up to 250℃, 350℃ respectively to remove impurities from the plasma-material interaction surfaces. Here the required heating power to be supplied for baking has been calculated according to pre-assumed different temperature profiles (baking scenario) and proper baking plan for KSTAR tokamak has been proposed. Mass flow rate and temperature of nitrogen gas for baking has also been calculated.
토카막 장치에서 자석 구조물의 조립에 관한 검토 KSTAR TF
김경민(K.M.Kim),최창호(C.H.Choi),홍권희(K.H.Hong),양형렬(H.L.Yang),유인근(I.K.Yu),허남일(N.I.Her),사정우(G.H.Kim),김학근(S.T.Kim),김근홍(H.T.Kim),김상태(J.S.Yang),김홍택(J.S.Bak),양진석(C.H.Kim),박주식(P.Z.Shick),김재호(J. Z. Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
TF magnet structures are the main structural components in the KSTAR magnet systems to protect<br/> the superconducting coils from mechanical, electrical, and thermal loads. TF coil structure supports CS<br/> and PF coil system. The inter-coil structure contains adjustable shear keys and conical bolts to provide<br/> pre-loading in toroidal direction and to resist against in-plane and out-of-plane forces that are the most<br/> critical loads on the TF magnet system. The conical bolts and shear keys are specially designed to<br/> assemble easily and to provide a convenient accommodation for a good alignment. The connection plate<br/> that is one of the prototype fabrications had been manufactured to study adjustability of conical bolts<br/> and shear keys for assembly of TF coil structure. We could measure the misalignments at the keyways<br/> and conical holes with the misalignment measuring instrument.