Comparative Study on UNDEX Resistance of the Air-backed Comparative Study on UNDEX Resistance of the Air-backed Stiffened Plate with Various Covering Layers Stiffened Plate with Various Covering Layers

Abstract : In order to improve stealthy capacity of a submarine, acoustic layers with special hollow structures are usually covered on hull surfaces of the submarine. The hollow structures can deform and absorb energy when they are subjected to underwater explosion (UNDEX), which can greatly raise the submarine's anti-shock performance. In this paper, comparative study on UNDEX resistance of the air-backed stiffened plate with various covering layers was carried out. The acceleration and strain responses of the typical positions of the stiffened plate were obtained by the testing. And the anti- shock effects of the stiffened plate with various covering layers were compared. The results may provide a guideline for the design and study of the acoustic covering layers against UNDEX.