FPSO典型节点疲劳寿命分析  

Fatigue life analysis for typical nodes of FPSO

作　　者：蒋文进 李良碧[1] 罗广恩[1] 朱德钦[1] 卫涛[1] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《舰船科学技术》2014年第12期29-33,38,共6页Ship Science and Technology

基　　金：国家自然科学基金资助项目(51079065;51109110);江苏省自然科学基金项目(BK2011508);国家重点基础研究发展计划(973计划)资助项目(2013CB036100)

摘　　要：FPSO在服役期间长期承受由波浪等引起的不断变化的交变载荷,为保证其安全工作,有必要对FPSO进行疲劳寿命分析。首先选取FPSO的舭部与船底连接处(典型节点一)以及肋板与纵舱壁连接的肘板趾端(典型节点二)作为疲劳校核的典型节点部位;然后通过建立典型节点一和典型节点二精细网格有限元模型进行局部应力分析,由线性插值法得到典型节点处的热点应力;最后基于双壳油船共同结构规范(JTP)中的S-N曲线疲劳分析方法,对两处典型节点进行疲劳寿命分析,得到疲劳寿命满足船东50年寿命要求的结论。FPSO long-term bears constantly changing load caused by waves and other during service.In order to guarantee its safe working,fatigue life analysis is necessary for FPSO. Firstly,the connection of bilge and the bottom of FPSO is called typical node one,and the connection of the ribs and the longitudinal bulkhead bracket toe is called typical node two. They are selected as the typical nodes for fatigue check.Through the establishment of the fine grid FEM for local stress analysis,the hot spot stress at typical node is gotten by linear interpolation method; Finally,based on the S- N approach of JTP rules（ Common Structural Rules for Double Hull Oil Tankers）,fatigue lives of the two typical nodes are calculated,and the result meets the life requirement of the owner for 50 years.

关 键 词：FPSO 典型节点 疲劳寿命 有限元方法 

分 类 号：U661[交通运输工程—船舶及航道工程]