基于子模型的浮式生产储卸油装置浮筒结构疲劳寿命分析  

Fatigue life assessment of floating production storage and offloading buoy structure based on submodels

作　　者：黄曙光[1] 杨小龙[1] 张守森[1] 汪美玲 陈娅凡 李英[2] HUANG Shuguang;YANG Xiaolong;ZHANG Shousen;WANG Meiling;CHEN Yafan;LI Ying(Offshore Oil Engineering Company,Tianjin 300451,China;State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300354,China)

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]天津大学水利工程智能建设与运维全国重点实验室,天津300354

出　　处：《应用科技》2025年第1期1-7,共7页Applied Science and Technology

基　　金：中国海洋石油集团有限公司科技项目(KJGJ-2023-0001).

摘　　要：为研究浮式生产储卸油装置(floating production storage and offloading,FPSO)浮筒关键节点的疲劳强度问题,本文基于FPSO三舱段、浮筒锥体、浮筒转塔、锥形对接模块(mating cone module,MCM)的整体模型,通过应力分析确定出应力较为集中的区域并作为热点,建立精细化网格的子模型以获得热点应力。基于力传递函数的方法,根据规范开展浮筒和MCM的疲劳简化分析,研究系泊和立管载荷对浮筒局部结构的疲劳影响。结果表明,浮筒锥体、浮筒转塔和MCM中关键节点的疲劳强度均满足设计疲劳强度要求,其中最薄弱的热点结构HS1的疲劳寿命为3262 a,大于20 a的设计寿命,满足FPSO单点系泊浮筒的设计预期要求。To investigate the fatigue strength issues of key nodes in the floating production storage and offloading(FPSO)buoy,based on the whole model including the three-tank section of FPSO,buoy cone,buoy turret,and mating cone module(MCM),the areas with concentrated stress are identified as hotspots by stress analysis.Subsequently,hotspot stress is obtained from submodel with refined elements.Based on the mechanical transfer function,simplified fatigue analyses are carried out for buoy and MCM according to the codes,so as to investigate the effect of loading transfer from mooring lines and risers on the local structure of the buoy.The results show that the fatigue strength of all critical nodes within the buoy cone,buoy turret,and MCM complies with design requirements.Notably,the hotspot structure HS1 has a fatigue life of 3262 years,significantly larger than the designed 20-year service life,which satisfys the desired design requirement for the submerge turret production of FPSO.

关 键 词：疲劳强度分析 简化分析法 子模型 力传递函数 浮筒 三舱段模型 锥形对接模块 有限元分析 

分 类 号：U661.39[交通运输工程—船舶及航道工程]