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윤희도 安東大學 1997 安東大學 論文集 Vol.19 No.1
A parametric design model is suggested for use in the railgun system optimization. Design parameters can be organized in four groups : design parameters of target effects, of hyper-velocity flight, of launcher and launch package, and of energy storage and pulse power system's. Some electromagnetic, thermal and structural design considerations of the launcher and launch package group are presented. Parameters are inter-related within their own design group as well as with ones outside. Therefore, a systematic parametric modeling is a must for successful optimum design of railgun systems.
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윤희도 安東大學 1998 安東大學 論文集 Vol.20 No.1
This publication deals with the theory and the design method for small railgun systems. Basic design theory was derived from the system's electrical, thermal, and mechanical energy balance conditions. The preliminary results of the Andong University's small railgun system development program was introduced and used as an example. A numerical procedure for calculating railgun's high frequency inductance gradient, L', was provided. A general method for the railgun system`s electrical circuit analysis was formulated and a quick and simple case was demonstrated. The characteristics and design requirements of the railgun system's parts, such as the pulse power supply system, high voltage, high current closing switches, pulse forming networks, high speed rails, and armatures, were discussed.
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윤희도 安東大學校 工業技術硏究所 1999 공업기술연구논문집 Vol.6 No.1
철심형 3MJ 보상펄스발전기의 설계, 그리고 이에 대한 전자기력의 해석 방법, 결과에 대하여 기술하였다. 발전기로부터 요구되는 사양을 충족하는 최소한의 전기적, 기계적인 변수들의 선정, 지지구조물의 기계적인 기초설계, 그리고 방전시 발생하는 전자기력의 계산방법, 전자기력의 분포 등에 대하여 상세히 고찰하였다. A design procedure used for a 3 MJ, iron core, prototype compulsator is presented. The electromagnetic force calculation and its results for the proposed new design are presented. The design parameters were carefully selected so that they satisfied both electrical and mechanical performance requirements. The rotor and stator support- structure's design, the discharge force distribution and the torque pulse calculation are presented.
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단위체 격자 재구성법과 전문가 시스템을 이용한 2차원 냉간 단조의 유한 요소 해석
윤희도,김영태,이낙규,양동열,이병채,Yun, Hui-Do,Kim, Yeong-Tae,Lee, Nak-Gyu,Yang, Dong-Yeol,Lee, Byeong-Chae 한국정밀공학회 1992 한국정밀공학회지 Vol. No.
A systematic method of remeshing is required due to severe mesh distortion after some finite deformation in the finite element analysis of practical forging processes. In order to cope with the problem of mesh degeneracy during deformation, the proper design of meshes plays an improtant role in the analysis. In so-called "Modular Remeshing", the physical characteristics of metal flow and geometric characteristics are incorporated in "Module", which can be applied to the mesh design for a certain mode of deformation in so far as the topology of deforming region remains the same. For the purpose of more effective and systematic use of the modular remeshing scheme, an expert system has been developed in the framework of the proposed remeshing schemel. In oredr to show the effectiveness of the method, the rib-web type forging with axial relief or radial relief and spike forging are simulated. It has been thus shown that the proposed method of automatic remeshing by using modular remeshing and expert system can be futher extended and applied to various forging problems with complicated geometrical configurations.ical configurations.
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연구논문 : 담양 의암서원(義巖書院)의 설립, 사액 그리고 철폐
윤희면 ( Hee Myeon Yoon ) 호남사학회(구 전남사학회) 2015 역사학연구 Vol.57 No.-
유희춘을 모시는 三川祠는 담양의 양반사림 58명이 앞장서고, 전라도 양반사림의 호응과 지방관들의 도움을 얻어 1610년경에 완성되었다. 삼천사는 1630년경에 향교 근처로 옮기고 白川祠라 이름을 바꾸었다. 옮긴 이유는 유희춘이 文節이라는 시호를 받은 것과 관련 있어 보인다. 1668년에 담양 양반사림들이 사액을 받고자 상소문을 제출하여, 1669년에 「義巖」이라는 사액 이름을 받았다. 의암서원은 사액을 받은 뒤 나라로부터 여러 가지 혜택을 받았다. 제례에 쓸 祭需와 각종 잡물을 관아로부터 지급 받았다. 토지 3결을 면세받았고, 노비도 한때 100여명 이상을 소유하였다. 액외원생(정액 이외의 원생)을 수령으로부터 허락을 받기도 하였다. 특히 관에서 보태준 식리전은 재정의 큰 비중을 차지하였다. 19세기에 들어와서는 서원이 문중서원화되는 경향을 보이는데, 유희춘 후손들이 원임을 담당하고 의암서원 운영에 깊이 간여하였다. 의암서원에서는 경제적 어려움을 타개하기 위하여 관에 적극적으로 밀착하였다. 수령에게 원장을 맡기고, 19세기에 들어서면 경원장제를 채택하였다. 그리고 이들의 후원을 얻어 많은 건물들을 수리하고 건립할 수 있었다. 19세기에 이르면 대부분의 서원은 교육기능은 제대로 발휘되지 못하고 있었다. 의암서원도 마찬가지였다. 대원군의 서원 철폐로 의암서원도 1871년에 철폐되었다. 호남의 유생들은 1884년에 유희춘의 문묘 배향을 요청하는 상소를 하였으나 뜻을 이루지는 못하였다. Samchonsa enshrined Yu Hee-chun was established by 58 Confucian scholars of Damyang who initiated the idea, being responded by Yangban Sarim of Jeolla Province. It moved next to Hyanggyo by the year of 1630 and named it Paekchonsa. Its movement resulted from Yu Hee-chun`s receiving his posthumous epithet(Munjeol)Yangban Sarim submitted public appeals to receive charter and as a result, they acquired EuAhm in 1669. Since then EuAhm Seowon got several kinds of benefits. The economic foundations of EuAhm Seowon were fields, serfs, extra students, wonbo and duty free village. Especially Shickrigeon that was added by public office formed a great part. Since the opening of 19th century, the descendants of Yu Hee-chun took the role of wonim and were deeply involved with its management. EuAhm Seowon tried to be close to a local authority to resolve financial difficulty. They entrusted the position of Wonchang to a chief magistrate and chose implementing Gyeongwonjang system. With their support, they could build and maintain more buildings. By the turn of 19th century, most of seowon could not perform its educational fundction. EuAhm Seowon was in the same situation. In line with Daewongun ordered the close of seowon EuAhm Seowon was closed down in 1871. Yangban yusaeng of honam Province filed an appeal to ask a Confucian shrine of Yu, Hee-chun, but could not fulfill their will.
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