简介:Thispaperextendsapredictionmodelformulti-directionalrandomwavetransformationbasedonanenergybalanceequationbyMasewiththeconsiderationofwaveshoaling,refraction,diffraction,reflectionandbreaking.Thisnumericalmodelisimprovedby1)introducingWen'sfrequencyspectrumandMitsuyasu'sdirectionalfunction,whicharemoresuitabletothecoastalareaofChina;2)consideringenergydissipationcausedbybottomfriction,whichensuresmoreaccurateresultsforlarge-scaleandshallowwaterareas;3)takingintoaccountanon-lineardispersionrelation.PredictionsusingtheextendedwavemodelarecarriedouttostudythefeasibilityofconstructingtheAiHuayachtportinQingdao,China,withacomparisonbetweentwoportlayoutsindesign.Wavefieldsinsidetheportfordifferentincidentwavedirections,waterlevelsandreturnperiodsaresimulated,andthentwokindsofparametersarecalculatedtoevaluatethewaveconditionsforthetwolayouts.AnalysesshowthatLayoutIisbetterthanLayoutII.Calculationresultsalsoshowthattheharborwillbecalmfordifferentwavedirectionsunderthedesignwaterlevel.Onthecontrary,thewaveconditionsdonotwhollymeettherequirementsofayachtportforshipberthingundertheextremewaterlevel.Forsafetyconsideration,theelevationofthebreakwatermightneedtobeproperlyincreasedtopreventwaveovertoppingundersuchwaterlevel.Theextendednumericalsimulationmodelmayprovideaneffectiveapproachtocomputingwaveheightsinaharbor.