简介:AmethodofreliabilityanalysisbasedonadirectstrengthcalculationemployingthevonMisesstressfailurecriterionispresentedhere.Theshorttermstraindistributionsofshiphullstructuralcomponentsareidentifiedthroughthestatisticalanalysisofthewave-inducedstrainhistoryandthelongtermdistributionsbytheweightedsummationoftheshorttermstraindistributions.Thewave-inducedlongtermstraindistributioniscombinedwiththestillwaterstrain.Theextremestraindistributionoftheresponsestrainisobtainedbystatisticalanalysisofthecombinedstrains.ThelimitstatefunctionofthereliabilityanalysisisbasedonthevonMisesstressfailurecriterion,includingtherelateduncertaintiesduetothequalityofthematerialandmodeluncertainty.ThereliabilityindexiscalculatedusingFORMandsensitivityanalysisofeachvariablethathaseffectsonthereliabilityisalsodiscussed.
简介:Theobjectiveofthisworkistoanalysefatiguereliabilityofdeckstructuressubjectedtocorrelatedcrackgrowth.Thestressintensityfactorsofthecorrelatedcracksareobtainedbyfiniteelementanalysisandbasedonwhichthegeometrycorrectionfunctionsarederived.TheMonteCarlosimulationsareappliedtopredictthestatisticaldescriptorsofcorrelatedcracksbasedontheParis-Erdoganequation.Aprobabilisticmodelofcrackgrowthasafunctionoftimeisusedtoanalysethefatiguereliabilityofdeckstructuresaccountingforthecrackpropagationcorrelation.Adeckstructureismodelledasaseriessystemofstiffenedpanels,whereastiffenedpanelisregardedasaparallelsystemcomposedofplatesandarelongitudinal.Ithasbeenproventhatthemethoddevelopedherecanbeconvenientlyappliedtoperformthefatiguereliabilityassessmentofstructuressubjectedtocorrelatedcrackgrowth.
简介:<正>Glasgow,UK18th-20thAugust2014AbouttheconferenceTheconferencewillbringtogetherresearchers,practitionerstoaddressthesafetyandreliabilityissuesasapplicabletodifferentstagesintheanalysis,designconstructionandin-servicelifeofmarinestructuressuchasship,offshore,submergedstructuresandtherenewableenergystructures.Thiswillinvolveadvancedanalysisbothforstrengthandloadmodelinordertoestablishsafetylevelbothfordeterministicmodel(WSDmethod)andforreliabilitybaseddesign(LRFDmethod).Oneoftheaimsofthedesignshouldbetoachieveadequatebutnotexcessivelevelofsafetywhichcanbesatisfiedthroughreliabilitybasedmethodandthistakesintoaccountuncertaintiesofdesignvariables.CurrentmoderncodesaretryingtoprovidedesignproceduresonLRFDformatalthoughnoexplicitreliabilityanalysisisdonetoarrivethesepartialsafetyfactors.Thisconferencewilldealwithalltheseissuesandseehowthesetechniquesareappliedtovarioustypesofmarinestructures.Glasgow,thevenueforthisconferenceisacitywhichhaslotofattractions.TheworldfamousLoch-LomondisonlyfewmilesawayandEdinburghis50minutesjourneybytrain.Thecitywillalsohostthe2014CommonwealthGames.
简介:文中通过FSA方法,分析构成海事事故的危险因素,提出实际有效的风险控制措施,基于有效性和经济性评估风险控制方案,从而得到最后的选择结果,完成本次基于FSA的秦皇岛港通航安全的研究。