Acoustic target strength analysis of composite egg-shaped pressure hulls

doi:10.19936/j.cnki.2096-8000.20211228.002

Abstract

Abstract: In order to study acoustic target strength of underwater composite egg-shaped pressure hulls, the minimum thickness egg-shaped pressure hulls satisfying the strength and buckling condition are taken as research object. An acoustic-solid coupling model of egg-shaped pressure hull is established with finite element method. The influence of design parameters such as material type, egg-shaped coefficient, composite material thickness and winding angle on acoustic target strength is analyzed. Finally, acoustic target strength of egg-shaped pressure hull composed of composite material with metal head is analyzed. The results show that under the same shape conditions, the maximum acoustic target strength of composite egg-shaped pressure hulls is lower than that of titanium. When sound waves incident along the tip direction of egg-shaped pressure hull, medium and high frequency acoustic target strength is the lowest and it is inversely proportional to the egg-shaped coefficient. It is suggested that egg-shaped pressure shell should be arranged with the tip upward in deep sea.

Key words: acoustic target strength, egg-shaped, composite material, pressure hulls, numerical analysis

CLC Number:

TB332

WU Jian, ZHU Ting-guo, LI Hong-yun, WANG Wei-bo. Acoustic target strength analysis of composite egg-shaped pressure hulls[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(12): 12-18.

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