ＲesearchonreliabilityofairportflightsupportoperationsystembasedonDBNWANGYong-gang，LIZhao-yu(SchoolofSafetyScienceandEngineering，CivilAviationUniversityofChina，Tianjin300300，China)Abstract:Topreventthefailureofairportflightsafetyoperationlinksfromcausingirregularflightoperations，therebyleadingtounsafeevents，thispaperproposestheconceptofairportflightsafetyoperationsystemreliability．Accordingtotherequirementsofindustryregulations，theparametersofreliabilityofkeynodesofairportflightsafetyoperationsystem，namelysafety，qualityandtimeliness，aswellastheircalculationprocessaredetermined．Consideringthemaintainabilityafterfailureintheairportflightsupportprocess，theparameterlogicaimingatthereliabilityoftop-levelparametersisgiven．Inaddition，throughtheanalysisoftheairportoperationmanual，thekeytasknodesoftheairportoperationprocessareobtained．Furthermore，theDBNmodelistransformedintothemappingruleaccordingtothelogicgate，totransformthefaulttreeoftheairportflightsupportprocessintotheDBNmodeloftheairportflightoperationsupportsystem．TheapplicationexampleanalysisisconductedwiththeflightsafetyoperationsystemoftheairportinNorthChina，andtheflightoperationsafetydataoftheairportinthepastfiveyearsarecollected．Itisfoundthattheaprongroundservicesafetyphasehasthegreatestimpactonthereliabilityoftheairportflightsafetyoperationsystem，amongwhichrefuelingoperation，equipmentrecovery，aircraftinspection，aircraftlaunch，baggagecargohandlingoperation，passengeroperation，andequipmentleaningoperationbelongtotheaprongroundservicesafetyphase．Asshownbytheresults，themodelcanbeusedinthedomesticflightsafetyoperationsystem，toidentifythecausesofairportoperationprocessfailurewithposteriorprobabilitywhenusedinthereliabilityanalysisofdomesticairportflightsafetyoperationsystem．Meanwhile，thesensitivityanalysiscanidentifythekeyweaklinksintheairportflightsafetyoperationprocess，whichisconsistentwiththeactualsituation．Inthisway，themodelcaneffectivelyanalyzethecausesoffailureandweaklinksin...
