• 대한조선학회지
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• 제2권1호
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• pp.24-28
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• 1965

불규칙(不規則)한 곡면(曲面)으로 이루어진 선체외판(船體外板)의 전개(展開)는 근사전개법(近似展開法)을 사용(使用)한다. 특(特)히 선박(船舶) cost를 절감(節減)하기 위하여 공수절약(工數節約), 공기단축(工期短縮) 및 오작(誤作)을 적게한다는 점(點)에서 생각해 볼 때, 아무리 완전(完全)에 가까운 전개법(展開法)이라도 복잡(複雜)하면 실용가치(實用價値)가 없다. 공원(工員)이 작업(作業)을 간단(簡單)히, 신속(迅速)히 할 수 있다면 완전(完全)한 가전면(可展面)의 경우라도 근사법(近似法)을 따르는 것이 좋다. 물론(勿論) 이때 실용상(實用上) 지장(支障)이 없을 정도(程度)의 오차(誤差)로 끝여야한다. 대한조선공사(大韓造船公社)의 현도장(現圖場)에서 사용(使用)하는 외판(外板)의 각늑골(各肋骨) 사이에서 하나씩 전개(展開)해가는 직각송법(直角送法), 송반법(送返法), 대각선법(對角線法), 방사선법(放射線法) 및 삼각법(三角法)과 외판일매(外板一枚)를 한번에 전개(展開)하는 기선법(基線法)이 있으며, 전자(前者)의 정도(精度)와 같고, 후자(後者)와 같이 현도전개(現圖展開)를 안하고 직접(直接) marking 할 수 있는 점(點)을 동시(同時)에 구비(具備)한 측지선법(測地線法)이 있다. 이 측지선법(測地線法)보다 작업(作業)이 간단(簡單)하고 용이(容易)하며 거의 동일(同一)한 정도(情度)를 가지는 등분선법(等分線法)과 기준선(基準線)이 Roller축(軸)이 되는 축선법(軸線法)이 있는데 이들 방법(方法)에 관(關)하여 간단(簡單)히 생각한다.

• 대한조선학회논문집
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• 제42권5호
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• pp.506-515
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• 2005

Novel ships are commonly required iterative hull form modifications until she get reputation for new marine environment. Small FRP boats are manufactured in a identical shape with a mould. It implies that every modification step requires great time and expense which makes it difficult to improve the hull form promptly. Domestic hull form of small fishing boat of force has been evolved from the traditional hull form of developable shape. Utilizing this typical developable characteristics of small boats, ,New mouldless production method for FRP boat has been suggested and it is confirmed that the method is recommendable for a petty order of hull in evolving period of hull form development.

• 대한조선학회 특별논문집
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• 대한조선학회 2011년도 특별논문집
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• pp.90-94
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• 2011

Longitudinal shell member that arranged block unit on 3D-curved surface is performed manual working by designer considering spacing of division characteristic, location and twisting at geometrical 3-dimensional form. Shell expansion drawing that drawn by initial design and shell landing work performed by hull production design have overlap of design work in terms of arrangement of shell longitudinal member. In this study, eliminate design overlap on shell member arrangement that is one of ship longitudinal member. Develop shell member optimization and auto arrangement system.

• 선박안전
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• 제5권
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• pp.10-19
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• 2000

소형어선이나 일반적인 활주형선형은 부분적인 형상 수정을 거치게 되면 3차원 곡면으로 이루어진 선체의 외판을 2차원 평면상에 전개하여 표현할 수 있다는 특성을 가지고 있다. 이러한 점을 활용하여 전개도형에 따라서 제작된 얇은 FRP 판재를 선 요소들로 정의된 형틀 상에서 변형시켜 선체의 형상을 만들고 그 내부에 추가로 FRP를 적층 함으로서 선체를 완성하는 방법을 제안하고자 한다.

• 한국CDE학회논문집
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• 제14권2호
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• pp.129-136
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• 2009

Generally, curved surfaces of ship hull are deformed by flame bending (line heating), multi-press forming, and die-less forming method. The forming methods generate the required in-plane/bending strain or displacement on the flat plate to make the curved surface. Multi-press forming imposes the forced displacements on the flat plate by controlling the position of each pressing points based upon the shape difference between the unfolded flat plate and the curved object shape. The flat plate has been obtained from the unfolding system that is independent of the ship CAD. Apparently, the curved surface and the unfolded-flat surface are expressed by different coordinate systems. Therefore, one of the issues is to find a registration of the unfolded surface and the curved shape for the purpose of minimum amount of forming works by comparing the two surfaces. This paper presents an efficient algorithm to get an optimized registration of two different surfaces in the multi-press forming of ship hull plate forming. The algorithm is based upon the ICP (Iterative Closest Point) algorithm. The algorithm consists of two iterative procedures including a transformation matrix and the closest points to minimize the distance between the unfolded surface and curved surfaces. Thereby the algorithm allows the minimized forming works in ship-hull forming.