现代造船技术-5thlecture

ModernShipConstructionModernShipConstructionTechnologyUnit9RelativeConcepts

ModernShipConstructionWhatarethepurposesofgroupRaiseefficiency,decreasecost,reduceindividualparts,shrinkcycletimeWhatare4stagesofproductionflowShipyard,group,line,processWhatarethekeypointsofPartsgroup,facilityModernShipConstructionParts“Partsgroup”isagroupofpartswithsimilarprocess,andthesepartscanbemanufacturedinone“facilitygroup”.Accordingtogrouptechnology,charactersofpartsitselfjustlikematerials,geometryandsize,cannotdecidewhich“partsgroup”itwillbelongto.Importantthingiswhetheritcanbemanufacturedinsimilarfacilities.ModernShipConstructionPartsSomepartswithsimilarshapesofcoursecanbelongone“partsThoughsomepartsalsohavesimilarshapes,theystillcannotbelongtoone“partsgroup”,becauseoflargedifferencesontherequestamount,toleranceerror,andspecialrequirements.Thoughsomepartshavedissimilarshapes,theystillcanbelongtoone“partsgroup”,becausetheyhavecommonmanufactureprocess.ModernShipConstructionPartswithsimilarshapesbelongtodifferent“partsModernShipConstructionDifferentrequestsofpartswithsimilarModernShipConstructionPartswithdissimilarshapesbelongtoone“partsModernShipConstructionFacility“Facilitygroup”isagroupoffacilitieswhicharespecificallytooledandscheduledasaunit.Itcanfinishtaskstomanufacturewholeone“partsgroup”comple Ifone“partsgroup”needsmanyfacilitiestomanufacture,thesefacilitiesshouldbegroupedtogetherphysicallyasone“facilitygroup”.So,“partsgroup”and“facilitygroup”areapairstrongModernShipConstructionScaleofFacility“Facilitygroup”hastwofacetswhichinfluenceitsfinancefactorandorganizationFinancefactor:consideringfinancefactor,scaleof“facilitygroup”isthebiggerthebetter.Organizationfactor:facilitiesneedworkerstooperate,soone“facilitygroup”with2workersorateamwith2-12workers,isthebestscale.Anditwillbebestefficient.ModernShipConstructionLifetimeofFacilityInasense,one“facilitygroup”likesasmallcompany,itcanmanufactureonegroupproducts,wecallthisonegroupproductsasa“partsgroup”.Onlywhenthisgroupproducts(“partsgroup”)shouldchangedesignstructureorneednewproductprocess,the“facilitygroup”willbedisassembled,andreassembledasanew“facilitygroup”afterthat.ModernShipConstructionHowtomake“PartsGroup”and“FacilityInoneshipyard,several“facilitygroups”andtheirrelative“partsgroups”alreadyexist.Keypointisnothowtomakesomewhatanewbetterrelationship,keypointishowtofindtheseexistingrelationships.Inordertofindthem,weshould yzeandclassifyallfacilitiesandallpartswhichneedtomanufacture,intolargegroups,middlegroupsandsmallgroups,until “facilitygroup”and“partsgroup”withsuitablescales.ModernShipConstructionHowtomake“FacilityStep1:firstclassifyallfacilitiesandpartsintolargegroups.Theprincipleisthattherearelesscommonfunctionsbetweendifferentfacilitygroups.Step2:baseson1ststep,furtherclassifylargefacilitygroupintoseveralmiddlefacilitygroups.Ifitisanotsolargezone,itwillbethefinalclassification.Step3:ifitisalargezone,classifymiddlegroupintoseveralsmallfacilitygroups.Afterall,maybetherearesomecommonfunctionsbetweendifferentsmallfacilityModernShipConstructionGroupTechnologyandtheShipbuilding“system”“zone”“multi-lanes”“integration”“agile”

grouptechnologygrouptechnologygrouptechnologyFurtherModernShipConstructionGroupTechnologyandtheShipbuilding“System”model(functionalsystemUnanticipatedchanges(manning,idleness)causeincreasedmanning,overtime,rapidfluctuations.Poorcostestimation,designinstability,bottleneckdelaysbecauseodmissingmaterialsorplans,highturnoveretc.OnesystemhastobeconcernedwiththemanytootherAmajorsourceofidlenessisabreakdowninschedulingandModernShipConstructionGroupTechnologyandtheShipbuilding“Zone”TheshipissubdividedintosmallgeographicalareasThesezonesrepresenttheoutputofaGTThecellisthenloadedwithalloftheresourcesnecessaryforthecompletionofsomemanageableworkpackage.Forexample:thefiremainsystem,alongwithventilationducts,electricconduit,etc.ModernShipConstructionGroupTechnologyandtheShipbuildingHullconstructionandoutfittingare Thisshortensthebuildingcycleandbringsareductionincongestionandidleness.Theresultisasmoother,moreconstantproductionratethroughout,andaminimizationofadjustmentcosts.ModernShipConstructionGroupTechnologyandtheShipbuildingThegroup,whi ayconsistofbetweentwoandadozenindividualsunderoneleader,takescareofinterfaceSequencingproblemsaregreatlysimplifiedandareresolvedatthelowestlevel.Thisgreatlyreducesfluctuationsinproductionrateandmanning.Ifthebudgetedresourcesarenotsufficienttocompletetheworkpackage,itisimmedia yapparent,andcorrectiveactioncanbetaken.ModernShipConstructionGroupTechnologyandtheShipbuilding“Agile”Thereare,ofcourse,costsassociatedwithincreasedproductivitythroughtheapplicationofgrouptechnology.Alloftheresourcesrequiredforagivenworkpackagemustbedeliveredtotheworksiteattherighttime.Adetailedclassificationandcodingsystemisalsorequiredinordertorealizetheaccuracyandcostsavingmadepossiblebytheapplicationofcomputerstoinventorycontrol,workschedulingandcontrol,design,andModernShipConstructionModernShipConstructionModernShipConstructionTechnologyUnit10CodingSystemModernShipConstructionClassificationofGermanscientistsprovidedaresearchresult:allofpartscanbedividedintoA,B,C3注A高低大BC低高小ModernShipConstructionfunctioncharactersimilarity(structure,materialandModernShipConstructionPurposesofIndesignaspect:convenienttofindandinformationofproducts,parts,andtheirInmanufactureaspect:convenienttoorganizefabricationusinggrouptechnologyaccordingtoprocesssimilarity,tooptimizeandstandardizeprocessesandtooldesigns.Inmanagementaspect:tooptimizeproductionplanandjobarrangement,tosetaccurayequipmentloadsandbestinvestmentrate.Inotheraspects:convenientto yzeandstatisticsresearch,todataminingbycomputersysteminorderto ModernShipConstructionRulesofUser’sScopeoftheMutuallyPermanentModernShipConstructionCodingCodingisoneexpressiontypeofinformation.Itisthebaseofinformationstandardizationandnormalization.Codingsystemhasfollowingrules:Uniqueness:onecodeonlyidentifiesoneExtensibility:haveenoughspaceBriefness:reduceCPUtimeandstoragespaceofUnifiedformat:normalizecodingSuitability:suitthechangesofcodingMeaning:includeinformationasmuchasSystematism:ensurecoordinatedrunningofcodesinStability:notchangefrequently,remainrelativeDistinguishability:easytoremember,understandandOperability:easytooperate,reduceCPUModernShipConstructionCodingSystemonGroupUnitaryAcodewithconsistingoffixedcolumncharacters,todescribeidentifiedobject.Thereisno“-”inthecode.Suitableforclassificationsystemwithsmallrangeandlesscodenumber.Mostly,inonecategorytable,convenienttouse.ModernShipConstructionCodingSystemonGroupCombinedtype:systemisconsistedofseveralsub-whichhavetherelationshipofprincipalandStructureofprincipalandfixedcolumncode:thecolumnsofprincipalandsubordinatesub-codesarebothfixed.unfixedcolumncode:thecolumnofprincipalsub-codesisfixed,butthecolumnofsubordinatesub-codesisSub-systemSuitableforsystemwithlargerangeandmorecodeModernShipConstructionStructureofCodingSubordinatestructure:thesub-codebehindsubordinatetothesub-codebefore.ThecodesfromN+1arethefurtherdescriptionandcomplementofthecodestillN.Thisstructureiscalled“tree”structure.Parallelstructure:thesub-codebehindhasitsownmeaning,independentofthesub-codebefore.Thisstructureiscalled“chain”structure.Combinedstructure:Consideringinformationcharactersandactualdemand,combinedstructureswhi “tree”structureand“chain”structureareusedinmostModernShipConstruction3TypesofCodingSystemModernShipConstructionCapacityofCodingCapacityofCodingSystemisthetotalamountofinformationorcharacterswhichthewholecodingsystem “tree”“chain”structure：combinedstructure：

RS=MI MI

RS=3I2RH＝32

I INs=thecolumnnumberof“tree”NL=thecolumnnumberof“chain”ModernShipConstructionComparisonof3Structureinconvenienttoanduse,easytosetBrishsystem:convenienttoanduse,easytoOpit