ABSTRACT

The paper presents the conversion of an oil tanker into FPSO to be operated in Gulf of Mexico (GoM) considering the strength and fatigue analyses. First, hydrodynamic analysis is performed for a typical full load condition and a typical ballast condition in order to determine hydrodynamic loads for ultimate strength and fatigue for operating as an FPSO in GoM. The section scantlings are then generated to assess the hull girder ultimate strength based on still water and site-specific wave loads. Fatigue analysis is carried out to estimate of used and remaining fatigue life, which is based on DNVGL Classification Note 30.7: ‘Fatigue Assessment of Ship Structures’. The analysis comprises a check of the longitudinal material amidships, and is based on the approved drawings applying ‘as measured’ scantlings taken from UTM measurements. The actual trade pattern of the vessel, and other assumptions, has a large effect on the fatigue life.

摘要

考虑到强度和疲劳分析，本文介绍了将一艘油轮改装成在墨西哥湾 (GoM) 运营的 FPSO。首先，针对典型的满载条件和典型的压载条件执行流体动力学分析，以确定在 GoM 中作为 FPSO 操作的极限强度和疲劳的流体动力学载荷。然后生成截面尺寸以根据静水和特定地点的波浪载荷评估船体梁的极限强度。进行疲劳分析以估计已用和剩余​​疲劳寿命，其基于 DNVGL 分类说明 30.7：“船舶结构的疲劳评估”。分析包括对船中纵向材料的检查，并基于批准的图纸，应用从 UTM 测量中获得的“测量”尺寸。