船舶典型节点疲劳强度试验及S-N曲线拟合方法研究（英文）-豆柴文库

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船舶典型节点疲劳强度试验及S-N曲线拟合方法研究（英文）
Title:ResearchonTypicalNodeFatigueStrengthTestingMethodandS-NCurveFittingforShips
Abstract:
Fatiguefailureisoneofthemajorconcernsinthedesignandoperationofships,especiallyatcriticalstructuralnodes.ThisstudyaimstoinvestigatethetypicalnodefatiguestrengthtestingmethodsandestablishtheS-Ncurvefittingforships.Theresearchisconductedthroughacomprehensiveliteraturereviewandanalysisofexistingexperimentaldata.Thefindingsandconclusionscanprovidevaluableinsightsforshipdesignersandoperatorstoimprovethefatigueresistanceofshipstructures.
1.Introduction:
1.1Background:
Shipstructuresaresubjectedtoacomplexanddynamicloadingenvironment,includingwave-inducedforces,cargoweight,andenvironmentalconditions.Theseconditionscaninducestressconcentrationsandleadtofatiguefailureatcriticalnodes.Therefore,assessingthefatiguestrengthofshipstructuresisessentialforensuringtheiroperationalreliabilityandsafety.
1.2Objectives:
Themainobjectivesofthisresearchare:
-Toreviewandanalyzetypicalnodefatiguestrengthtestingmethodsforships.
-ToestablishtheS-Ncurvefittingmethodforships'typicalnodes.
-Toproviderecommendationsforimprovingthefatigueresistanceofshipstructures.
2.LiteratureReview:
2.1OverviewofFatigueStrengthTesting:
Thissectionprovidesanoverviewoffatiguetestingtechniquescommonlyusedinshipbuildingandrelatedindustries,includingconstantamplitudetesting,variableamplitudetesting,andspectrumloadingmethods.Theadvantagesandlimitationsofeachmethodareanalyzed.
2.2TypicalNodeFatigueStrengthTesting:
Theliteraturereviewfocusesonthefatiguestrengthtestingmethodsforshipstructures'criticalnodes,suchasbuttjoints,hatchcorners,andlongitudinalstiffeners.Variousexperimentaltechniquesusedinpreviousstudiesaresummarized,includingfull-scaletesting,scaledmodeltesting,andfiniteelementanalysis(FEA)simulations.
3.ExperimentalDataAnalysis:
3.1DataCollection:
Existingfatiguetestdatafordifferentshipstructuresarecollectedandcategorized.Thecollecteddataincludestress-timehistory,fatiguelifecycles,andfailuremode