International Journal of Naval Architecture and Ocean Engineering

  • 제5권3호
  • /
  • Pages.431-453
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  • 2013
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  • 2092-6782(pISSN)
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  • 2092-6790(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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Practical investigation of a monopod fabrication method and the numerical investigation of its up-righting process

  • Hafez, Khaled A. (Department of Naval Architecture and Marine Engineering, Faculty of Engineering, Alexandria University) ;
  • Ismael, Maged M. (Director of Engineering Affairs, Marine Branch, The Petroleum Project and Technical Consultation Co. (PETROJET))
  • 발행 : 2013.09.30
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초록

The principal purpose of this paper is to present a novel two phases rational scenario applied in constructing an offshore monopod platform; in which the two phases are the all-ground horizontal construction phase and the post-construction phase. Concerning the all-ground construction phase, a brief investigation of its different stages, i.e., pre-fabrication, fabrication, pre-assembling, positioning, assembling, and surface finishing is introduced. The important practical aspects of such construction phase are investigated without going into the nitty-gritty of the details involved therein. Concerning the post-construction phase, a clear investigation of its sequential stages, i.e., lifting, moving and up-righting is introduced. A finite element model (FEM) of the monopod platform is created to perform the structural analysis necessary to decide the suspension points/devices and the handling scenario during the various stages of the post-construction phase on a rational wise. Such structural analysis is performed within the framework of the three dimensional quasi-static modeling and analysis aiming at simulating the realistic handling condition, and hence introducing a reliable physical interpretation of the numerical results. For the whole effort to be demonstrated efficiently, the results obtained are analyzed, the conclusions are presented, and few related recommendations are suggested.

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