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Numerical analysis of an over-boarding operation for a subsea template

Journal of Ocean Engineering and Science 2021年第2期6卷 146-159页

作者： Lin Li Adham M.Amer Xinying Zhu Department of Mechanical and Structural Engineering and Materials Science University of StavangerNorway Ocean Installer AS StavangerNorway

Subsea templates are normally transported to the installation site on the deck of a crane *** being lifted off from the deck,the template is 1)over-boarded from the initial location to the target position by the side of the vessel;2)lowered through the splash zone;3)further lowered down to the seabed and 4)finally positioned and *** the mentioned phases should be ***,the splash zone crossing phase is taken as the critical phase and analyzed to define the installation weather *** over-boarding phase has not been the focus of analysis due to a large involvement of human actions and little involvement of hydrodynamic *** offshore operations,the offshore manager may decide to decrease the defined installation weather criterion if the risk of the personnel safety on deck during over-boarding phase is considered ***,it is of great need to quantify the operational criterion for such *** objective of this paper is to perform numerical analyses and define the allowable sea states for a safe over-boarding *** numerical analyses using time-domain simulations have been performed in various sea *** lines have been modelled to control the motions of the template during the *** pendulum motions of the subsea template are considered as the critical responses for the assessment of the allowable sea states.

关键词： over-boarding Subsea template installation Tugger lines Allowable sea states Pendulum motion

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