摘 要: | 1IfltroductionSince6o's,withthedevelopmentoflargemolecularmaterialsandcompositematerials,structurematerialsinunderwateracousticapplicationshavemadeagreatchanges.Forex-ample,thepropertiesofsonardomesthatmadefromreinforcedpolymersinsteadofstainlesssteelhavebeenimprovedobviously.Inordertodesignrationally,itisnecessaryforengineerstofindouttheiracousticpropertiescompletely.Accordingtotheelastictheories,twokindsofwave:longitudinalwaveandshearwavewillbeexcitedontheboundaryoftwomediumswhilethesoundsar…
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