Analysis And Design Of Deep-Sea Submersible Structures

The 21st century is the era of Deep Ocean exploring and developing. Both the deep ocean, which occupies the 49 percent of the earth surface and the ocean bottom, where the maximum depth could reach 11 ,000m, contains rich resources such as strategic metals, energy SOUrCeS and biological genes. These resources are the biggest potential treasury having not been fully recognized and utilized, and also the important foundation for human抯 continuous development. And the deep-sea vehicle is a kind of equipment, which can carry all sorts of electronic and mechanical devices, engineers and scientists to severe deep-sea environment rapidly and accurately, and can perform ocean exploring, scientific survey and operational missions more effectively. The vehicle is an important technical tool for human to perform ocean-exploring tasks. For these years, deep-sea vehicles for various purposes and of various types have come out continually and they act effectively in geological research, resource investigation, etc. in the deep sea. A lot of unprecedented information has obtained, but this only represents a tiny part of the vast ocean. For this reason, the new types of 4 deep sea submersibles, which can stay at ocean floor for a long time and work for a long time, can finish the specific mission of observing and operating in the deep sea, will develop continuously for the future. To meet the demand of the new condition, it is always the goal of new technology of deep sea submersible to improve the operating efficiency, expands the underwater operating ability, shorten the working period, simplif~?the logistics support, reduce the developing cost, and control the appropriate operation cost. The weight and volume are the important indication to directly affect the general 4 performance. And the type of main structural elements is also related to the general performance. The operating depth determines the form and weight of pressure hull and exostructure. To increase endurance and reduce the energy assumption and -Iv - improve the working efficiency, it is necessary to lighten the submersible structure weight and then lighten the total weight of submersible. While the safety of the submersible is satisfied, the reduction in submersible structure is a saving in the construction cost. It will increase load-carrying capacity and improve economic benefits. One main task of the submersible design is to reduce the weight in pressure hull and exostructure. The application of new material and new technology in deep sea submersible can reduce the weight of submersible structure weight, but because of the specialty of the structure form and the application of the new material in deep sea submersible, it is necessary to seek a corresponding reliable method of design and analysis. The current submarine structure design guide is only applicable for the pressure hull and non-pressure hull of submarine with 921 steel material, and its operating depth not exceeds 300 meters. And the existing submersible guide is based on the submarine design and calculation method. Current design criteria are typically codified in the form of simple equations or charts, they usually contain some empirically defined safety factors and correction coefficients based on the results. But for the deep-sea submersibles, because of the distinct difference in the material, structure form and load condition between the deep-sea submersibles and the submarine, it...