Browse > Article
http://dx.doi.org/10.5574/KSOE.2013.27.4.001

Three-Dimensional Grillage Analysis of Reaction Forces on Supports of Pre-Erection Block  

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.)
Publication Information
Journal of Ocean Engineering and Technology / v.27, no.4, 2013 , pp. 1-8 More about this Journal
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.
Keywords
Pre-erection block; Support reaction; Grillage analysis; Weight distribution;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Lloyd's Register, 1983. Lloyd's Register's Plan Appraisal Systems for Ships-ship Type Procedural Documents for Oil Tankers. STPD.
2 Rigo, P., Rizzuto, E., 2003. Analysis and Design of Ship Structure. In T. Lamb (ed), Ship Design and Construction, Vol. 1, The Society of Naval Architects and Marine Engineers, Jersey City, NJ, (2003), 18-1-76.
3 Choi, J.H., Oh, S.H., Hang, C.H., Jun, M.J., 2002. Development of Docking Analysis System. Proceeding of the Annual Autumn Meeting, SNAK, Busan, 437-442.
4 Chun, M.S. and Seo, Y.S. Heo, K.S., Chung, S.W., Park, S.M., Cho, H.G., 2006. A Study on Structural Safety Assessment for Docking Condition. Special issue of the Society of Naval Architects of Korea, 89-96.
5 Chun, M.S., Seo, Y.S., 2007. Development of Hull Safety Assessment Method in Docking. Virtual Product Development Conference 2007. MSC Software Korea, Seoul.
6 Hooke, R., Jeeves, T.A., 1961. Direct Search Solution of Numerical and Statistical Problems. Journal of the Association for Computing Machinery, 8(2), 212-229.   DOI
7 Kim, S.C., Ryu, C., Kim, Y.H., Han, C.B., Kim, D.G., 2013. A Study on the Optimal Arrangement of Pre-erection Block Supports. Proceeding of The Joint Conference of the Korean Association of Ocean Science and Technology Societies 2013, Jeju, 494-499.
8 Kim, S.C., Ryu, C., Lee, J.H., Lee, K.S., Baek, K.D., Sohn, S.Y., Choi, J.H., 2008. On the Docking Analysis of Global Ship Structure Using Simplified Grillage Model. Journal of the Society of Naval Architects of Korea, 45(6), 710-718.   과학기술학회마을   DOI   ScienceOn