FPSO船典型节点疲劳强度分析_英文_

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1、第7卷第3期船舶力学Vol.7No.32003年6月JournalofShipMechanicsJun.2003ArticleID:1007-7294(2003)03-0068-08FatigueAnalysisofCriticalStructuralDetailsforFPSOHullsLEJing-xia,SUNHai-hong(TransportationCollege,WuhanUniversityofTechnology,Wuhan430063,China)Abstract:FatigueanalysisofCriticalStruc

2、turalDetails(CSDs)ofFPSOframeswascarriedoutinthispa2per.ItconstitutedacomputationalmodelforatypicalCSDbasedongeneralFEMprogramofANSYS.TheCSDlocatesattheintersectionofsidegirderthroughtransverseframe,whichhasbeenverifiedtosustainthefatiguedamagebyalargesetofsurveydata.Thepara

3、metricalanalysisbyvaryingdimensionsoflugandcut-outwascarriedoutinordertodisclosethedimensionaleffectsonthehotspotstress.FatiguestrengthatthetwohotspotsforatestmodelbuiltinNorwegianUniversityofScienceandTechnologywasevaluatedaccordingtoABSrules,andthecomputationalresultswerec

4、omparedwiththoseofthetestmodel.There2sultsshowthatreasonablescantlingoflugandcut-outisimportanttoenhancethefatiguelifeoftheCSDandthedefinitionoffatiguecriterionshouldbebasedontheconsequenceoffatiguefailure.Keywords:floatingproduction;storageandoffloadingsystem(FPSO);Critical

5、StructuralDetails(CSDs);fatiguedamage;hotspotstressCLCnumber:U661.4Documentcode:A1IntroductionTraditionally,shipstructureisdesignedinconformitywithultimateloads.While,alongwiththewide-spreadapplicationofhighstrengthsteel(HSS)andtheimprovementofweldability,thestrengthofshipst

6、ructureimprovegreatly,whichcanminimizeandlightenstructuremem2bers.AlthoughHSSapplicationtoshipstructuremaydecreasetheexpensesofconstructionandop2eration,thestresslevelinthestructureswillincreaseaccordingly.Asaresult,fatiguestrengthbe2comesoneofthemostsignificantproblemsinshi

7、pstructureswhichisworthytobepaidattentionto.FPSOhavebeenwidelyusedforthedevelopmentofoffshoreoilandgasfieldsbecauseoftheirattractivefeaturessuchasarelativelylowcostandshortconstructionperiod;alargeworkingarea,loadingcapacity,andstoragecapacity,whichareimportantfeaturesforapl

8、atformthatmustsupportprocessfacilitiesandprovidesufficientstorageforprocess