The pressure hull collapse and protective cover in high-pressure environments

The pressure-resisting structures on the manned submersible include not only the manned sphere hull but also various pressure-resisting tanks and pressure-resisting equipment. When implosion occurs, the impact energy will be transferred to the adjacent components on the deep-sea submersible, causing great danger to the safety of the deep-sea submersible. In this paper, the adjustable ballast water tank is taken as an example. Pressure hull collapse under a high-pressure environment is simulated. By analysing the calculation results of the three-phase coupling model, it can be obtained that the collapse mode and collapse load in the finite element analysis are in agreement with the experiment. To reduce the impact of pressure hull collapse, the deep-sea explosion-proof device is designed and the wall thickness is calculated. This paper provides a reference for the study of pressure hull collapse and protective cover design in high-pressure environments.