Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Three-Dimensional Grillage Analysis of Reaction Forces on Supports of Pre-Erection Block

격자구조모델을 이용한 선체 PE블록의 반목 반력 해석 시스템 개발

  • Ryu, Cheolho (Department of Naval Architecture and Ocean Engineering, Inha Technical College) ;
  • Kim, Sungchan (Department of Naval Architecture and Ocean Engineering, Inha Technical College) ;
  • Kim, Dong Geun (Daewoo Shipbuilding and Marine Engineering Co., LTD.)
  • 류철호 (인하공업전문대학 조선해양과) ;
  • 김성찬 (인하공업전문대학 조선해양과) ;
  • 김동근 (대우조선해양(주))
  • Received : 2013.05.13
  • Accepted : 2013.08.12
  • Published : 2013.08.31
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Abstract

Many PE (pre-erection) blocks are supported by wooden, concrete, or steel supports when they are stocked in the outdoor areas of a shipyard. Their positions and numbers are planned on the basis of the workers' experience. Recently, many shipyards have been making PE blocks with various shapes and weight distributions because of the variety of ships and building technologies. Therefore, it is now necessary to deal with blocks that they have no experience with. We propose a method to conveniently and quickly evaluate the structural safety of PE block supports, without the need for special knowledge and technology related to structural analysis. This method can reduce the large number of man hours (MH) normally needed for the analysis. The three-dimensional grillage analysis is performed for a simplified grillage model of a PE block. For efficiency, the grillage model of the PE block is automatically built from its three-dimensional CAD model, and its weight is also automatically distributed on the grillage model. The integrated system has been comprehensively implemented to perform the grillage analysis for the reaction forces on block supports. This paper describes how to make a grillage model of a PE block and estimate the weight distribution of the block on this grillage model. These steps are verified by comparing the supports reaction forces to those of the 3D finite element analysis for the PE blocks that are provided by a shipyard.

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References

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