故障树分析(FTA)方法及其基于VC的软件设计的研究

-I-UDC(FTA)VC200212002320021-II-ADissertationinMachineDesignandTheoryResearchofFaultTreeAnalysisMethodandDesignofSoftwareBasedonVCbyLinYanpingSupervisor:ProfessorXieLiyangNortheasternUniversityJanuary2002-III--IV-(FTA)VCFTAFTAFTA()FTAVC++6.0FTASemanders2/3(CommonCauseFailureCCF)FTAFTA-V-FTAABSTRACT-VI-ResearchofFaultTreeAnalysisMethodandDesignofSoftwareBasedonVCAbstractFTAisanimportantmethodtoevaluatethereliabilityandsecurityofcomplicatedsystem.Afteralmostfortyyearsdevelopment,FTAhashadrelativecompletetheory.HoweverinthefieldofcombinationblowupdifficultyandthecorrelationofbaseeventsofFTA,therestillhavemanytasksawaitingustoresearch.Moreover,alongwiththeincreaseofsystemcomplexityandtheincreaseofsystemcomponents,theresearchofsystemreliabilitydependingonhandworkhasalreadybecomeverydifficult,soweshouldcomposesomeprogramtoanalysisthesystembytheaidofcomputer.Thisthesiswilldosomeresearchonthesequestions.Throughtheobject-orientedtechnologyofprogramming,IdevelopthismutualsoftwareofFTAbasedonVC++6.0.Thissoftwarebasedontheconceptionofdelamination,ittransferstheinformationoftheseeventswhilebuildingthefault-tree.Sotheinformationthatrequiredusertoinputwillbedecreased.Whileanalyzingthefault-tree,thissoftwareusealgorithmbasedontheSemandersandprime-numberalgorithmtogaintheMCS.thisalgorithmiseasytobeimplementedincomputer.Thethesiscompletesthebasicfunctionsuchasqualitative-analysisandquantified-analysis,atthesametime,itappliesatechniquebasedonmodulesandtransfereventstosimplifyfaulttree,andachievetheanalysesandcalculateofbigfaulttree.Moreover,italsodealswiththeCommonCauseFailure(CCF)inthetwo-componentparallelconnectionsystemandthe2/3redundancysystem.ThissoftwarecompletesthevisualizingandmutualoperationandhasABSTRACT-VII-manymeritssuchashavingcompletefunction,easytodistinguish,havinggoodfeedback.ComparedwiththeotherFTAsoftware,itissimpletoinputandoperation,andinthebigfaulttreeanalyses,itisveryrapidbecauseofsimplifiedtechnique.AtthesametimeitalsodevelopsomeresearchregardingoftheeffectofCCFinsystemreliability.Theresultsdeclaresthataftersimplifyingbasedonthemoduleandthetransferevent,thecalculatingspeedofbigfaulttreehasimprovedseveraldecuplesorseveralcentuples.ItalsoshowsthatafterdealingwithCCFtheprobabilityofthesystemfailurewillbehigherandbemorepreciseandmorebelievable.KeywordsSystemReliability,FTA,SoftwareofFTA,Modularize,TransferEvent,CCF-VIII-······················································································III····························································································IVAbstract······················································································VI··············································································11.1·····························································································11.2·····························································································21.3··········································································31.5··········································································5·····························································82.1·························································································82.2·········································································································82.3·········································································································92.4·······································································································102.4.1-······················································································102.4.2-······················································································102.5······································································································112.6······································································································12·····················································143.1···············································································································143.1.1FTA·······················································································143.1.2FTA·······················································································153.1.3FTA···············································································163.2···························································································163.2.1···················································································163.2.2···································································································173.3·······························································································17···························194.1···············································································································19-IX-4.1.1··············································