FPSO串靠外输时的碰撞性能分析  

Collision Analysis for FPSO in Tandem Offloading Operation

作　　者：李博文 高明星 张延昌[2] 刘刚[1] 黄一[1] LI Bo-Wen;GAO Ming-Xing;ZHANG Yan-Chang;LIU Gang;HUANG Yi(Faculty of Ship Engineering, Dalian University of Technology, Dalian 116024, China;Marine Design and Research Institute of China, Shanghai 200011, China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《中国海洋大学学报（自然科学版）》2020年第7期135-142,共8页Periodical of Ocean University of China

基　　金：2015年工信部海洋工程装备科研专项“FPSO失效数据库及风险评估系统研发”项目资助。

摘　　要：FPSO与穿梭油轮进行串靠外输过程中,穿梭油轮首部可能与FPSO尾部发生碰撞事故,称为“尾碰”。目前的相关研究主要集中在碰撞过程中的风险分析,缺少对FPSO“尾碰”事故碰撞性能的合理分析与评估。本文针对某15万吨级FPSO,基于动态非线性有限元分析软件ABAQUS,采用同步损伤分析技术,研究了串靠外输过程中FPSO与穿梭油轮之间由于过分纵荡运动而引起的碰撞事故。通过数值仿真计算,分析了包括“尾碰”后结构的损伤变形、应力应变关系、碰撞力和吸能情况的船舶碰撞内部动力学,进而对FPSO尾部结构的碰撞性能进行评估。结果表明,FPSO尾部结构中板材结构吸收的能量约占尾部结构总吸能的75.5%,其吸能能力显著优于T型骨材结构,研究结果对FPSO尾部结构的耐撞性设计具有一定的参考意义。As a comprehensive large marine oil production base,FPSO has become the main production mode of marine oil and gas resources development.The oil and gas of FPSO are generally transported by shuttle tankers in the form of tandem offloading operation which is able to adapt to complex operation conditions in sea conditions and has higher safety.According to the experience of the shuttle tankers’company,excessive surging is one of the most dangerous factors that affect the safety of the offloading operation.And the extreme excessive surging may cause collision accident.In tandem offloading operation,that FPSO’s stern is impacted by shuttle tanker’s bow is a possible but critical accident called stern collision.Stern collision accidents often cause damage to FPSO’s stern structure and a large number of oil spills,resulting in marine environmental pollution,personnel casualties,loss of property,and other serious consequences.At present,there is no reasonable analysis and assessment on crashworthiness for stern collision,while relevant specification mainly pays attentions on risk analysis of collision.Therefore,this paper focuses on the collision accident during tandem offloading operation due to the extreme excessive surging.In order to improve the crashworthiness of the FPSO’s stern structure and ensure its safety during tandem offloading operation,it is of great significance to analyze and evaluate stern collision performance at the design stage.This paper focuses on simulating the collision accident due to excessive surging between 150000 t FPSO and 100000 t tandem offloading shuttle tanker.In this paper,the internal mechanics of ship collisions is mainly studied.The dynamic structural response and energy absorption of the hull structure are analyzed.Then the effect of the flow field around the hull is simplified as the additional water mass,while the motion between the hulls is ignored.The collision scenario is selected according to the FPSO tandem offloading operation mode.The numerical simulation is car

关 键 词：FPSO 串靠外输 船舶碰撞内部动力学 碰撞性能 同步损伤分析 非线性有限元分析 

分 类 号：P752[天文地球—海洋科学]