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김사수(Sa-Soo Kim),조대승(Dae-Seung Cho),안호일(Ho-Il Ahn),정상민(Sang-Min Chung) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.2
Many of steel structures having little internal damping consist of stiffened plates. In case that viscoelastic materials are adhered to the stiffened plates for the reduction of structure-borne noise, their effects are varied by the adhered position and dynamic characteristics of the structures as well as their material properties and adhered amount. In this paper, sound reduction effects of viscoelastic materials partially adhered to the different positions of a stiffened steel plate have been investigated by the measurement of vibratory velocity and sound intensity. The results show that optimal adherent positions of viscoelastic materials to reduce sound radiation power are the loop areas of modes.