DeterminationofIceLoadonShipHullbyInverseMethodLIUYing-hao1,SUOMINENMikko2,KUJALAPentti2,ZHANGHan-xi-zi1,GAOLiang-tian3(1.ChinaShipResearchandDevelopmentAcademy,Beijing100101,China;2.DepartmentofAppliedMechanicsMarineTechnology,AaltoUniversity,Espoo15300,Finland;3.CollegeofShipbuildingandEngineering,HarbinEngineeringUniversity,Harbin150001,China)Abstract:Theiceloadonashiphullisdirectlyrelatedtotheshipsafetyduringavoyageinice-cov⁃eredseas.Twoinversemethods,influencecoefficientmatrixmethodandTikhonovregularization,areintroducedtodeterminetheiceloadonthesternshoulderofapolarsupplyandresearchvesselwithfull-scaledmeasurementdata.TheinfluencecoefficientmatrixmethodisbuiltupexperimentallyandusedtoobtaintheiceloadonframeswhileTikhonovregularizationisconstitutedwiththreedis⁃cretizedapproachesandutilizedtodeterminetheiceloadontheplatefield.Theresultsshowthatbothinversemethodscouldovercometheill-conditionsofprocessingdataandobtaintheiceloadonshiphull.Keywords:iceload;full-scalemeasurement;inversemethod;loaddiscretizationCLCnumber:U661.43Documentcode:Adoi:10.3969/j.issn.1007-7294.2023.06.0100IntroductionRecently,theincreaseofmarinetransportationandactivitiesinPolarRegionshasbeenkeptup,sincethereisagreatundergroundfortuneincoldregionsandtheiceconditionsareturningeas⁃ier.Determinationoftheiceloadactingonashipstructureisimportanttoensurethesafetyandsta⁃bilityofthevesseltooperateinice-coveredseas.Inmechanics,theinverseproblemscanbedistinguishedintwocategories[1-2]:solvingsystemmodelwithgiveninputsandresponsesandsolvinginputswithgivensystemmodelandresponses.Theiceloaddeterminationbelongstothesecondcategoryofinverseproblem.Whenthemeasuredresponseandsystempropertiesareknown,it'saprocesstodeterminethedynamicloadactingonthestructures[3].Themethodsofdynamicloaddeterminationhavebeenstudiedinmanyareaswiththeincreasingpracticalengineeringdemandinrecentyears.Doyle[4]investigatedaninversedecon⁃volutionmethodwithwaveletanalysisandFourieranalysistoreconstructthedynamicloadofabeamandplat...
