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立管涡激振动高阶响应研究（英文）.docx

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立管涡激振动高阶响应研究（英文） Title:HigherOrderResponseAnalysisofVortexInducedVibrationofRiserPipes Abstract: Riserpipesareacriticalcomponentofoffshorestructuresusedforoilandgasproduction.Thevortex-inducedvibration(VIV)phenomenon,inducedbytheinteractionbetweenoceancurrentsandtheseslendercylindricalstructures,canhavedetrimentaleffectsontheirintegrity.ThispaperexploresthehigherorderresponseanalysisofVIVinriserpipes,aimingtoprovideabetterunderstandingofthecomplexstructuralbehaviorandofferinsightsforthedesignandmaintenanceofoffshorestructures. 1.Introduction Offshorestructuresaresubjectedtovariousenvironmentalloads,includingoceancurrents,waves,andwind.Amongthese,vortex-inducedvibrationshavereceivedsignificantattentionduetotheirpotentialtoleadtofatiguedamageandpossiblefailureofriserpipes.ThissectionprovidesanoverviewoftheVIVphenomenon,itssignificance,andthemotivationforstudyinghigherorderresponsecharacteristics. 2.Vortex-InducedVibrationofRiserPipes ThissectionpresentsadetailedexplanationoftheVIVmechanism,includingtheinteractionbetweentheflowfieldandthecylinder,theformationofvortices,andtheresultingvibration.ThedynamicsofVIV,includingthelock-inphenomenon,arediscussed,aswellasthefactorsinfluencingtheamplitudeandfrequencycharacteristics. 3.HigherOrderResponseAnalysis TheresponseofriserpipestoVIVisusuallycharacterizedbythedisplacementamplitude,frequency,andmodeshape.Traditionalanalysismethodsoftenconsideronlythefirstmoderesponse,neglectinghigherordermodes.Thissectiondiscussestheimportanceofconsideringhigherorderresponsesandtheirinfluenceontheoverallstructuralbehavior.Differentanalysistechniques,suchasempirical,analytical,andnumericalmethods,arepresentedforcapturinghigherorderresponses. 4.ExperimentalStudies ExperimentalstudiesplayacrucialroleinunderstandingandvalidatingVIVanalysismethods.ThissectionprovidesanoverviewofexperimentalsetupsusedtomeasurehigherorderresponsesofriserpipessubjectedtoVIV.Itdiscussesvariousmeasurementtechniques,includingstraingauges,accelerometers,andopticalmethod