intheusain1970s,itcombinedthethreeexistingsustentionsource:uoweredstaticlift(buoyancy),poweredstaticlift(theliftofaircushion)anddynamicliftontoanewshipindifferentproportio.thehydrofoilsmallwaterplaneareaship,socalledashyswas,isasuperiorperformancevehicleamongthesehybridconceptshi,itisanidealcomb

inationofhydrofoilcraftsandapodofaswath,andhasthebenefitsofthetwoshiptypes.
theresearchonhyswasbeganinthemid1970s.attheinitialstage,someworkswerecarriedoutontheschemeevaluation,modelexperimentsandtheoreticalanalysis.since1990,japan,usaandsouthkoreamadeseveralsmallexperimentalhyswasoneafteranother,theresearchworkonhyswashasbeenboomingagainoverseas.germany,france,unitedkingdomalldevotedtheirenthusiasmtotheconcept.butinourcountry,therearenoworkswitchedinthisfield.basedonthissituation,suortedbynationallab.ofhydrodynamicsandcombinedwiththelatestresearchprogreesoverseas,thisdiertationinvestigatesseveralimportantproblemsasfollows:
1.theevaluationonhyswasscheme
basedontherequirementsforgeneralarrangement,structure,operationandmanagement,buildingtechnologyandsoon,andcoideringtheseveraloverseassmallexperimentalhyswas,anewhyswasschemewithfixedhydrofoilsisdevelopedforthefirsttimeintheworld.thelinesplanandgeneralarrangementbasedonthehigh-eedpaengershiparealsofinished,thelinesoftheuerhullbeingaccordantwiththecharacteristicsofhyswasinoperationproce(hullborne→takeoff→foilborne).
2.theresearchonresistanceperformanceofhyswas
basedontheresistancecalculationmethodsofswathsandhydr

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