선박의 초기설계 제품정보관리를 위한 PLM 시스템 원형 개발

이찬우,이장현,이경호,이재범,김대석,서흥원,Lee, Chan-Woo,Lee, Jang-Hyun,Lee, Kyung-Ho,Lee, Jae-Beom,Kim, Dae-Seok,Seo, Heung-Won 한국전산구조공학회 2008 한국전산구조공학회논문집 Vol.21 No.6

최근의 제조 산업에서 제품개발 정보는 제품 수명주기 관리(PLM: Product Lifecycle Management) 시스템을 통하여 관리하고, 조달과 생산 계획에 관련된 통제는 전사적 자원관리(ERP: Enterprise Resource Planning), 생산 관리 시스템이 담당하고 있다. 특히, 효율적인 제품 개발과 시스템 구축 여부는 설계 및 생산, 원가 관리 전체에 걸쳐 영향을 미친다. 따라서 도면, 모델, 자재 정보 등 제품정보관리를 위한 PLM시스템의 역할이 매우 중요하게 여겨지고 있다. 이러한 PLM체계는 요구 사항 분석, 시스템 설계 그리고 기존 Data Migration 등 정보 시스템 개발 절차를 따라서 수행된다. PLM시스템은 전사적인 시스템 개발 과정에서 Prototype개발을 진행하여 구축 절차와 체계 설계를 검증하는 것이 효과적이다. 이 과정에서 PLM 아키텍처 및 제품 구조(Product Structure) 구성, PLM의 기능 개발을 수행한 후에 전체 시스템 설계 개발을 재 수행하는 것이 효과적이다. 본 연구에서는 조선 PLM구축에 필요한 절차와 체계 설계 방법을 제시하고, 이를 초기 기본 설계 단계에 적용하여 PLM구축 방법론을 제시하고자 한다. 초기 설계를 대상으로 요구사항을 도출하고, PLM의 아키텍처를 설계하였으며, 설계한 시스템을 Prototype형태로 제시하였다. Shipbuilding is a kind of ETO(Engineering To Order) industry which designs and produces a product in accordance to various requirement of customers, rules and regulations. Recently, the number of ordered ships has been increased by up to two or three times in each domestic shipyards. Most shipyards have been adopted 3D ship CAD, ERP(Enterprise Resource Planning) and APS(Advanced Planning System) to get an efficient product development and manufacturing system. However, not only the effective operation of 3D ship CAD, ERP and APS but also the production efficiency can be achieved only if product information management which can manages the product data is implemented in an integrated environment. Present study has suggested a systematic approach to implement a PLM system to manage the product data in early design shipbuilding. Also, a prototype of PLM is implemented to manage the product data in a basic ship-design. In the prototype system, a product structure and architecture of PLM is considered.

Poly(L-lactide)(PLLA)/Polyoxyethylene(POE) 블록공중합체의 약불방출담체에 관한응용

이찬우,임대우,전근,Lee, Chan-Woo,Ihm, Dae-Woo,Jun, Kun 한국섬유공학회 2000 한국섬유공학회지 Vol.37 No.9

An A-B-A block copoly(ester-ether) comprising poly(L-lactic acid)(PLLA, A) and poly (oxyethylene)(POE, B) was prepared by copolymerization. The release rate of the model drugs form PLLA/POE particles was studied by varying the hydrophilicity of the model drugs as well as that of the copolymers. It was observed that the rate of controlled release from the copolymer microspheres is not dependent on the degradation of the polymer, but on the wall permeability which is defined as the product of diffusion coefficient and the solubility coefficient. The release rate was fast as long as the hydrophilicity of the copolymer was high, regardless of the composition of the copolymer. It was also found that the release rate was faster as the monomer composition of the oxyethylene unit becomes higher.

FEM해석 기반 스퍼기어 펌프의 실험적 검증에 대한 연구

이찬우,김상유,이서한,김재열,임진혁,Lee, Chan-Woo,Kim, Sang-Yu,Lee, Seo-Han,Kim, Jae-Yeol,Lim, Jin-Hyuk 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.6

This work investigated the performance improvement of a medium-pressure fixed-displacement-type SPUR gear pump, which is mainly used in the machine tool industry. The 3D CFX analysis and IS technique were applied using ANSYS (commercial FEM code) and compared with experimental results to ensure the reliability of the analysis. In addition, the performance improvement of the pump was obtained using the theoretical volumetric displacement equation, and the gear tooth width was changed. The pressure flow performance curves were compared, and the results were analyzed according to the width of the gear teeth. This is a factor that can cause irregular flow, vibration, and noise inside the gear pump owing to friction between the housing and gear pump.

강성기초의 3차원 동적 경계요소해석

이찬우,김문겸,황학주,Lee, Chan Woo,Kim, Moon Kyum,Hwang, Hak Joo 대한토목학회 1993 대한토목학회논문집 Vol.13 No.5

본 연구에서는 강성기초의 동적응답을 얻기 위해서 비완화 경계조건(non-relaxed boundary condition)을 적용한 3차원 경계요소를 사용하였다. 경계요소는 장래의 비선형문제의 확장을 위해서 시간영역에서 형식화되었으며 기본해는 무한영역의 Stokes 해를 사용하였다. 본 연구는 검증되었으며 지반기초 및 임의 형상의 지하구조물외 동적응답을 얻는데 이용할 수 있다. In this work the dynamic response of 3-D arbitrarily shaped rigid massless foundation is numerically obtained using boundary element under non-relaxed boundary condition. The problem is formulated in time domain by the boundary element method. The fundamental solutions used in this work are the Stokes solutions of the three dimensional elastodynamics. This method has advantages over frequency domain techniques in that it provides in a natural and direct way the time history of the response and forms the basis for elct:ension to nonlinear problems. This work is verified and can be used for practical purpose.

MPD 값의 변화로 평가한 UVA 정률적 증량법에서의 건선 PUVA 요법의 치료효과

이찬우(Chan Woo Lee),김영훈(Young Hun Kim),이병건(Byoung Gun Lee),송기훈(Ki Hoon Song),김기호(Ki Ho Kim) 대한피부과학회 2002 大韓皮膚科學會誌 Vol.40 No.9

N/A Background: The PUVA therapy of psoriasis is a very effective therapeutic modality that combines the action of light and drugs. Generally the conventional PUVA therapy based on patients skin type is used in Korea. But there are many reported that conventional PUVA therapy is not suitable in several instances including the determination of oral 8-methoxypsoralen(8-MOP) dose, initial and incremental UVA dose and so on. Objective: The purpose of this study is to establish a new protocol of PUVA therapy that is photomedically acceptable, Method: From 1997 to 2001, twenty psoriasis patients of moderate to severe grade who visited our clinic, were treated with PUVA therapy. Initial UVA dose was the same as MPD of each patient and proportion of weekly incremental UVA dose was 20% added to previous dose. All patients received PUVA therapy twice a week. The 8-MOP dose was determined by body surface area. Result: Total of 8 patients were skin type III, and 12 patients were skin type IV, The average of initial MFD in skin type III was 1.75J/㎠(0.5~2,5J/㎠) and skin type IV was 3.25J/㎠ (2.5~4.5J/㎠). The average number of treatments to the end of therapy were 13.63(10~16) in skin type III, and 12.5(8~18) in skin type IV. The total cumulative UVA dose was 44.73J/㎠ (30~68.2J/㎠) in skin type III, and 67.9SJ/㎠ ((31.6~109J/㎠) in skin type IV. Conclusion: The excellent effectiveness and safety of our new PUVA protocol have been demonstrated. We conclude that this FUVA protocol is a very effective, safe, and efficient method for the treatment of psoriatic patients. (Korean J Dermatol 2002;40(9): 1083~1088)

통근형 2층 고속열차 시스템 기초 연구

이찬우(Chan-Woo Lee),김형진(Hyeong-Jin Kim),고태환(Tae-Hwan Ko),권석진(Seok-Jin Kwon) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10

본 연구는 KTX-산천 고속차량에 비해 수송능력이 최대 200% 이상 증대된 통근형 2층 고속열차 개발을 위한 시스템 기초연구이다. 국내에서 운행되고 있는 2층 열차인 ITX-청춘 열차는 수송력 증강 보다는 운행 노선 특성 상 관광을 위한 개념이 강조된 차량이다. 본 연구에서는 국내 고속철도 운행 노선 중 현재 승객이 많은 서울 ~ 대전 구간에 투입하여, 향후 고속철도 이용 승객들의 운임 부담을 저감할 수 있는 차량인 통근형 2층 고속열차 개발에 관한 기초연구이다. 본 연구에서는 2층 고속열차의 기술적 목표 사양을 KTX-산천 대비 200% 이상 이용 승객이 늘어 나는 것과 운행 속도는 300km/h로 정하였다. 따라서 본 연구에서는 기술적 목표 사양에 따른 기술적 도전 문제 중심으로 통근형 2층 고속열차 관련 시스템 기초 연구를 실시하였다. This study increased up to 200% more than the KTX-Sancheon high-speed vehicles, transport capacity intercity double deck of high-speed train system developed basic research. Route characteristics, rather than the transport capacity augmented with an emphasis on the concept of awards for tourism in the country for a double deck ITX-Cheongchun vehicle. In this study of domestic high-speed rail service routes put the most from Seoul to Daejeon in the interval, the current passenger commuter-type vehicles that can reduce the burden of future high-speed rail passengers" fares on the development of intercity double deck high-speed trains basic research. Intercity double deck high-speed trains, the specification of the technical objectives presented in this study, KTX-Sancheon train passengers at more than 200% increase over the equivalent of 300km / h with the same service speed was defined. Therefore, in this study, according to the specifications of the technical objectives technically challenging problems centered double deck high-speed train system, basic research was conducted.

국내외 철도 사고 사례분석을 통한 열차 충돌/탈선 사고 위험도 분석

이찬우(Lee Chan-Woo),왕종배(Kang Jong-Bae) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-

THE DOMESTIC AND FOREIGN OF THE COUNTRY RAILROAD ACCIDENT ANALYSIS IT LED FROM THE PAPER WHICH IT SEES AND IT ANALYZED A TRAIN COLLISION/DERAILED ACCIDENT RISK FIXED QUANTITY. THE TRAIN ACCIDENT OCCURS DIRECT AND LATENT DAMAGE. IT CLASSIFIES THE ACCIDENT WHICH 5 YEAR FOR OCCURS RECENTLY DOMESTIC AND FOREIGN OF THE COUNTRY WITH A TYPE FROM THE RESEARCH WHICH IT SEES. IT TRIED TO ANALYZE THE DAMAGE SIZE AGAINST A TRAIN COLLISION/DERAILED ACCIDENT WITH DANGEROUS QUOTIENT

고속철도 차량용 차륜플랜지 마모특성 분석

이찬우(Lee Chan-Woo),강부병(Kang Bu-Byoung) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-

This study presents the wheel wear measurement results of Saemaeul train running on the conventional line. The train set included three different cars which have different shape of wheel profile including KNR and KTX profile currently used in Saemaeul. Train set was operated on Seoul-Pusan line with fixed train set formation for commercial service. Wheel wear measurements were performed periodically. Here, we describe some results.

조임력 크기와 싸이클 수에 따른 풀림 방지 너트 특성 연구

이찬우(Chan Woo Lee),김형진(Hyeong Jin Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.4

복합압밀시험기를 이용한 PBD의 압밀배수특성에 관한 연구

이찬우(Lee Chan Woo),정두회(Jung Du Hwoe) 대한토목학회 2008 대한토목학회 학술대회 Vol.2008 No.10