Abstract
Large submersible deep-water vehicles have become the key equipment for global exploration of the ocean. As one of the core components of underwater equipment, underwater pressure tanks protect internal devices from huge water pressure on the one hand, and are also the main supplier of underwater buoyancy on the other hand. Compared with metal materials, the designability of composite materials can provide researchers with a variety of structural methods. In this paper, a new type of double-layer pressure tank is proposed, the influence of structural size on the critical load of the pressure tank is explored, and a grid structure is designed to optimize the stability of the large-size pressure tank. The feasibility is proved by finite element analysis experiments.
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