简介：Theeffectsofwaterdepthonthewave-inducedverticalbendingmomentandshearingforceonaverylargeFPSOarestudiedbyexperimentsandcomputationsforregularandirregularwaves.TherestrictedwaterdepthcompositeGreenfunctionisemployedtodevelopaprogramforthecomputationofthehydrodynamiccoefficientsoftheverylargeFPSOatshallowwater.Athree-segmentmodelwith1:100scaleistestedintheStateKeyLaboratoryofOceanEngineeringatShanghaiJiaoTongUniversityfortheverificationofthenumericalmethod.Theexperimentalandcomputationalresultsshowthatthewaterdepthhasasubstantialeffectonwave-inducedloads.Thewave-inducedverticalloadsincreasewiththedecreaseofwaterdepthforshallowwater.Especially,forultra-shallowwatertheseloadsincreaseveryevidentlywiththedecreaseofwaterdepth.Thelong-termpredictionvaluesofwave-inducedverticalloadsincreasewiththedecreaseoftheratioofwaterdepthtodraught.Thelong-termpredictionvaluesofwave-inducedverticalloadsareabout8％largerthanthosefordeepwaterwhentheratioofwaterdepthtodraughtis3.0.However,waterdepthhardlyaffectsthelongtermpredictionvaluesofwave-inducedloadswhentheratioofwaterdepthtodraughtislargerthan5.0.
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