簡(jiǎn)介:1COPYRIGHT?2016BYASMEANEWDESIGNFORFLOATINGOFFSHOREPLATFORMSSVKHONSARI,MEMBER,ASMEDEPARTMENTOFCIVILENGINEERINGSHARIFUNIVERSITYOFTECHNOLOGYPOBOX111559313TEHRAN1458889694,IRANF982188803629,EVAHEED_KYAHOOCOUKGLENGLAND,MEMBER,ASMEDEPARTMENTOFCIVILENVIRONMENTALENGINEERINGIMPERIALCOLLEGELONDONLONDONSW72BU,UKF442075945989,EGENGLANDIMPERIALACUKEMORADKHANDEPARTMENTOFCIVILENGINEERINGSHARIFUNIVERSITYOFTECHNOLOGYPOBOX111559313TEHRAN,IRANEAMORADKHANGMAILCOMARVALIKHANIDEPARTMENTOFCIVILENGINEERINGSHARIFUNIVERSITYOFTECHNOLOGYPOBOX111559313TEHRAN,IRANEVALIKHANIALIREZAYAHOOCOMMRBAHADORIDEPARTMENTOFCIVILENGINEERINGSHARIFUNIVERSITYOFTECHNOLOGYPOBOX111559313TEHRAN,IRANEBAHADORIMRGMAILCOMABSTRACTWHILEFORSHALLOWWATERSTHEUSEOFOLDOFFSHOREJACKETSSTILLSEEMSEFFICIENTANDJUSTIFIABLE,FORDEEPANDULTRADEEPWATERSSUCHPLATFORMSCANNOTBEUSEDDURINGTHEPASTFEWDECADESTHEOLDGENERATIONOFFIXEDOFFSHOREPLATFORMSWASSUCCEEDEDBYTHENEWFLOATINGPLATFORMSANDNEWDESIGNSSUCHASFPSOSANEWFAMILYOFFLOATINGOFFSHOREPLATFORMSHASBEENDEVELOPEDTHESESHOULDBEABLETORESPONDTOSIZE,WEIGHTANDSPACEFOROPERATINGEQUIPMENT,IETHEYCANBECONSTRUCTEDTOHAVEAWIDERANGEOFLOADBEARINGCAPACITIESUSEISMADEOFTHEOLDCONCEPTOFLIFESAVINGTUBES,WHICHINTHEIRSIMPLESTFORMCANBEATOROIDALSHAPEDTYREINNERTUBETHETORUSSHAPEDIDEACANBEFURTHEREXTENDEDTOOTHERSHAPESOBTAINEDEITHERBYREVOLVINGANYPLANECLOSEDCURVEORPOLYLINEABOUTACOPLANARAXISWHICHDOESNOTINTERSECTIT,ORBYEXTRUDINGTHECURVE/POLYLINETHROUGHACLOSEDPATHTHEPRELIMINARY‘STRUCTURAL’CALCULATIONSCARRIEDOUTONVARIOUSSAMPLESOFTHETORUSSHAPEDMEMBERSOFTHISFAMILYOFPLATFORMSSHOWEDTHATTHEORETICALLYTHEYCANBEDESIGNEDTOCARRYASMUCHLOADASREQUIREDANDPROVIDETHEUSERSWITHTHEREQUIREDSPACEONTHEWATERMOREOVER,BASICSTUDIESOFTHESTABILITYOFSUCHSYSTEMSINWATERSHOWEDTHEIRLARGEMETACENTRICHEIGHTSASWELLASLARGERIGHTINGMOMENTARMS,HENCETHEIRHIGHDEGREEOFSTABILITYTHISSTABILITYCANBEFURTHERINCREASEDBYUSINGOTHERVERSIONSOFTHISIDEAWITHMOREEFFICIENTTOROIDALSHAPESFURTHERMORE,APPARENTLY,MUCHSTUDYISREQUIREDHOWEVERTOESTABLISHTHISIDEAASAVIABLE,COSTEFFECTIVEANDEFFICIENTALTERNATIVEFORCURRENTGENERATIONSOFOFFSHOREFLOATINGPLATFORMSKEYWORDSFLOATINGOFFSHOREPLATFORMS,TORUSSHAPEDANDTOROIDALSHAPEDHULLS,BUOYANCY,METACENTER,STABILITYINWATERPROCEEDINGSOFTHEASME201631STINTERNATIONALCONFERENCEONOCEAN,OFFSHOREANDARCTICENGINEERINGOMAE2016JULY16,2016,RIODEJANEIRO,BRAZILOMAE201683698DOWNLOADEDFROMHTTP//ASMEDIGITALCOLLECTIONASMEORG/ON05/20/2016TERMSOFUSEHTTP//ASMEORG/TERMS3COPYRIGHT?2016BYASMEFIGURE1THECONCEPTUALDESIGNOFTHEPROPOSEDFLOATINGHULLATHEORIGINALCONCEPTWITHTORUSSHAPEDGEOMETRY,BANIMPROVEDDESIGNWITHLARGERBUOYANCYFORCE,CATORUSWITHTRIANGULARCROSSSECTION,DTRIANGULARCROSSSECTIONUSEDWITHTRIANGULARPLANFIGURE2AMODULARSEGMENTALVERSIONOFTHEDEVISEDPLATFORMWITHFOURCONSTITUTINGSEGMENTSCONNECTEDTOEACHOTHERTHROUGHATRUSSTYPESTRUCTURELOADBEARINGCAPACITYADONUTSHAPEDHULLSINORDERTOHAVEANINITIALESTIMATEOFTHELOADBEARINGCAPACITYOFTHEORIGINALVERSIONOFTHISTYPEOFPLATFORM,THEFOLLOWINGSIMPLEBASICCALCULATIONSAREPRESENTEDTHREECASESHAVEBEENSTUDIED1SEMISUBMERGED,HR,FIG3A23/4HEIGHTSUBMERGED,H3/2R,FIG3B3FULLYSUBMERGED,H2R,FIG3CBUOYANCYFORCE,BFVARIABLEFORTHE3CASES,ANDTHEWEIGHTOFTHESTEELHULL,SWCONSTANTFORTHE3CASESANDHENCETHELOADBEARINGCAPACITYOFEITHERCASE,C,ARECALCULATEDASBELOW,1SEMISUBMERGEDHULLWWDBRRVFΡΠΡ221SSSSRRTRTRRRWΡΠΡΠΡΠ22222422≈??2SWSBRRRTRRWFCΡΠΡΠ2224??323/4HEIGHTSUBMERGEDHULLWWDBAARVFΡΠΡ221WRRRΡΑΑΠΠΑΠΠ??????2COSSIN22224WBRRRFΡΠΠΠΑ????????→/622433225SWSBRRRTRRRWFCΡΠΡΠΠ2??????????443322225163FULLYSUBMERGEDHULLWWDBRRVFΡΠΡ2227SWSBRRRTRRWFCΡΠΡΠ222242??8DOWNLOADEDFROMHTTP//ASMEDIGITALCOLLECTIONASMEORG/ON05/20/2016TERMSOFUSEHTTP//ASMEORG/TERMS
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