A novel rational scenario for the post-construction phases following all-ground construction of an offshore platform

作者：Hafez Khaled A^*; Ismaiel Maged M

来源：Ships and Offshore Structures, 2013, 8(2): 200-213.

DOI：10.1080/17445302.2012.684282

• offshore monopod platform
• finite element analysis
• structural analysis of a platform
• lifting of a platform
• moving of a platform
• up-righting of a platform

This paper investigates numerically and applies practically a newly proposed rational structural analysis scenario for the feasible manipulation of the triple post-construction phases of a monopod platform. In applying such a scenario, the phases of interest are those of lifting, moving and up-righting, which immediately follow the all-ground horizontal construction of the monopod. The proposed scenario has already been applied in manufacturing a monopod named Thekah at the Petroleum Projects and Technical Consultations Co. (PETROJET) yard, Alexandria branch, Egypt. Currently, the platform is installed in an area of 25 meters water depth to the north east of the Suez Canal. The practicality of such a scenario is realised by reducing the time, cost and risk latitudes of construction through the overall pre-to-post construction phases. In performing the necessary structural analysis during the aforementioned triple successive post-construction phases, a finite element model (FEM) of the monopod is created. To reflect a realistic manipulation of the triple post-construction phases and to introduce a meaningful physical interpretation of the crude numerical results, a 3D quasi-static loading is adopted. To rely on the proposed structural analysis scenario, a partial validation of the displacements at different locations along Thekah monopod main leg is performed.

• 出版日期2013-4-1