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LAMINATED VISCOELASTIC PLATE WITH INCLUSIONS FOR PASSIVE UNDER-WATER ACOUSTIC CONTROL

Zhao Hanzhong (Department of Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China)  
The effectiveness of a fluid-loaded sandwiched viscoelastic layer in suppressing acoustic scat- tering and radiation has been estimated using the Thomson-Haskell matrix method.The GU(Gaunaurd and Uberall)resonance theory has been adopted to handle three types of viscoelastic substrates with air-filled in- clusions.The effects of the varying thickness of the substrates,the volume fractions of the inclusions and fre- quencies of incident waves have been stubbed to determine the optimal strategies of signal reduction.In the investigation,the monopole resonance phenomena of the inclusions have been taken into account.
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