With the increasing depletion of global land resources, deep-sea mineral resources have gradually attracted global attention. Countries have intensified their investment in order to seize this field. As one of the important supports for mining, the research and development of deep-sea mining water surface support systems have significant engineering application significance. This article aims to study and explore the overall scheme design of the water surface support system for deep-sea mining, in order to meet the requirements of efficient, safe, and environmentally friendly deep-sea mining design. This article analyzes various aspects of the mining water surface support system, comprehensively considers factors such as the speed, seaworthiness, mining efficiency, and long-term stable operation of the water surface support system. Through reasonable selection and layout, the overall design scheme of the mining water surface support system is finally formed to adapt to the operational environment and requirements. This article has certain reference significance for the overall design of the deep-sea mining water surface support system, which can be used as a reference for related design work.

A common problem faced in the construction of ship products is that the ship hull is made of steel structures while the superstructure is made of aluminum structures in order to reduce the ship weight and increase ship speed. The main hull and the superstructure are then welded to an aluminum-titanium-steel composite transition joint, respectively. In actual ship construction, the quality problem of the delamination of the steel-aluminum transition joint will bring great threats to the safety of the hull itself. The influence of welding heat on the steel-aluminum transition joint is studied in this paper. Firstly, the residual stress of the steel-aluminum transition joint is tested. And then the residual stress and the temperature field in the welding process of the steel-aluminum transition joint for the steel fence are calculated and analyzed by the finite element simulation method. The welding process of the steel-aluminum transition joint is also analyzed from two aspects of welding speed and welding current. The residual stress results agree well with those from the simulation results for the validity of the current simulation method. The results show that the faster the welding speed and the smaller the welding current, the lower the influence of the welding temperature..