A ship hull, of whatever materials it may be made, must be strong enough to withstand all the loads that may be imposed upon it by normal service and by any seaway that may be expected during its life. There are four main contributions to the coherent method in this thesis. The usual shape of a submarine pressure hull is in the form of a ringstiffened circular cylinder, blocked by end caps, as shown by fig. They used the concept to build a pressure hull inside the enclosure of the running craft, which was just like a torpedo boat. Ross, 2001, which may be a fraction of the same vessel to explode under uniform internal pressure, as shown in figure 1. Numerical analysis of sandwich composite deep submarine. Shape the pressure hull consists of spherical or cylindrical shapes in various combinations. Fbw scs requirements manual was promulgated in 2004. Navys submarine safety standards flybywire ship control system fbw scs certification program with the advent of flybywire ship control designs in submarines, navsea recognized the need for a certification program for this new t echnology. The rooms except the battery room are arranged at upper or lower platform and the battery room and the tanks are arranged at the. Naval architecture naval architecture strength of ships.
As early as the 1960s, cylindrical models were being built and tested in an effort to build a pressure hull with a strengthtoweight ratio superior to highstrength steel. Optimal structure design of elliptical deepsubmersible. Also, computer programs can be developed by the use of spread sheets that will enhance the many trade off studies that are required for a successful concept design. Rules for classification and construction iii naval ship technology 2 subsurface ships 1 submarines. The estimated schedule of fatigue life developed herein can provide the structural designer and the operator of the submersible pressure hull with an effective tool for both design and periodical. Optimization of compartments arrangement of submarine pressure hull with knowledge based system. Brown rcnc the clearing up of the many doubtful points which still await complete theoretical and practical solution must be left to the future.
Firstly, there is an integrated domain driven design approach for a technical description of the design object, the. News marine technology products and solutions teledyne. Researcharticle design optimization of composite elliptical deepsubmersible pressure hull for minimizing the buoyancy factor elsayedfathallah,1,2 huiqi,1 lilitong,1. Hull design is one of the most important aspects of the design of a submersible. Pdf submarine pressure hull design and the application. It must, in fact, have a reserve of strength to take care of excessive loads carelessly or negligently applied or of loads caused by. Extensive development of this task at a scientific level. Spheres are also require complicated machining processes. Submarine pressure hull design diving depths between the wars.
This study presents a numerical analysis and design optimization of sandwich composite deep submarine pressure hull using. The modularity concept is embraced at all levels of submarine production and operation, namely. Finally, a submarine pressure hull is considered as an illustrative example to predict its fatigue life. One of the critical elements in designing the poleclimbing robot is an enclosure for the electronic components that can sustain high pressure and. The pressure hull is sometimes surrounded by a hydrodynamic hull, which is in a state of freeflood and is therefore unlikely to fail owing to hydrostatic pressure. Shape of a submarine 2026 executive summary in about the year 2026, the present class of australian submarines, the collins class, will be approaching obsolescence.
The pressure hull is a pressure vessel that operates in deep waters. Future seahawk submarine pressure hull setup in the shop. The voice over video shows the collapse modes of a submarine pressure hull. Rules for classification and construction iii naval ship. A practical approach for modelling submarine subsystem. The design of these pressure vessels is made with reduced thickness walls and ring stiffeners joined to the walls, with an arrangement as shown at figure 3. Geometric configurations such as hull shape, shell thickness, stiffener layout, and type of materials are the key factors influencing the structural performance of pressure hulls. Modular customisation for customers needs figure 3. This study aims to minimize buoyancy factor and maximize deck area and buckling. At the subsystem level of design, synthesis processes comprise. The light hull casing in british usage of a submarine is the outer nonwatertight hull which provides a hydrodynamically efficient shape. Design of submarine pressure hulls to withstand buckling.
This study presents a numerical analysis and design optimization of sandwich composite deep submarine pressure hull using finite element modeling technique. Paper 12 a practical approach for modelling submarine subsystem architecture in sysml paul pearce asc pty. These studies clearly emphasized that there is an obvious need for improved strength modeling to use in reliabilitybased design approach for submarines. Gorman and louie 1991 developed an optimization method to examine the material, form, and architecture of the pressure hull by considering the hull yielding, buckling, general instability, and instability of failure mode. First entry by sub builder john kammerer into his future seahawk submarine. Pressure hulls the structure that provides the occupants of an underwater submersible with a dry, pressure resistant habitat. This external hull, which actually forms the shape of submarine, is called the outer hull casing in the royal navy or light hull, as it does not have to withstand a pressure difference. The video shows the collapse modes of a submarine pressure hull, together with the shapes of different pressure hulls, designed to resist the. Maximizes the strength of the submarine so that it does not collapse under the huge water pressure. Structural model and material property a ringstiffened composite material pressure hull. The pressure hull is the primary element of submarine, which withstands diving pressure and provides essential capacity for electronic systems and buoyancy. The outer hull is simply a smooth fairing that covers the nonpressure sensitive equipment of the submarine such as main ballast tanks and anchors to improve the submarines. The electronic pdf version of this document, available free of charge.
A submarine hull requires expensive transversal construction, with stiffener rings located more frequently than the longitudinal. Janaury 24, 2010 myknowledge posted on 01232010 12. Optimization of compartments arrangement of submarine. In terms of diameter which may sometimes equal beam gotlands are 6. A system for the collection of data for future use can be enhanced by use of the curves presented. In the cylinder like design of a submarine, the diameter of a pressure hull significantly effects on many other feature of a submarine including space, propulsion choices and acoustics. Submarine pressure hull design and the application of gained experience to the design of other pressure structures conference paper pdf available may 2016 with 2,346 reads how we measure reads. Estimation of the low cycle fatigue life for a submarine. History of submarine composites eric greene associates. Minimize the buoyancy factor of a submarine pressure hull under hydrostatic. The hulls are welded, and in at least some cases submarines have been cut in half and welded back together either to lengthen them, or to maintain a reactor. Teledyne marine is a group of leadingedge subsea companies with technologies divided into 5 core segments. Jackson 1992 presented a concept design of submarine, which.
It is designed for a particular collapse depth, at which complete failure is expected within a very narrow range. Hull build photos and captions for seahawk personal. Submarine pressure hull design diving depths between the. The pressure hull of a submarine has to withstand very large differential pressure between hydrostatic pressure in submarine operating depth and atmospheric pressure in inner space of a submarine. The aim of this study is to maximize the structural efficiency of elliptical deepsubmerged pressure hull under hydrostatic pressure. Pdf structural design of small submarine pressure hull. The pressure hull is the inner hull of a submarine that maintains structural integrity with the difference between outside and inside pressure at depth.
A submarine hull has two major components, the light hull and the pressure hull. The umm concept component and system levels without the need for a substantial growth in the submarines size. Pdf on apr 1, 2016, elsayed fathallah and others published optimum structural design of deep submarine pressure hull to achieve minimum weight find, read and cite all the research you need on. Design of submarine pressure hulls to withstand buckling under. Pdf optimum structural design of deep submarine pressure. The pressure hull is the primary structural element of the submarine, and is designed to be able to withstand the external hydrostatic pressure. Croatian experience submarine pressure hull construction is one of the most significant parts of the whole autonomous submarine system design. The machinery, the structure, communications, sensors, weaponry will need updating and replacing and the hull structure will have reached the. The conceptual design of a pressure hull design for an underwater pole inspection system is presented in this study. This design made the submarine able to occasionally submerge and surface, later becoming the practical solution for many decades. Inside the outer hull there is a strong hull, or pressure hull, which withstands sea.
Submarine pressure hull design and the application of gained experience to the design of other pressure structures ivo senjanovic, nikola vladimir university of zagreb, faculty of mechanical engineering and naval architecture ivana lucica 5, 0 zagreb, ivo. Recently, submersible pressure hulls with fiberreinforced multilayer constructions have been developed as substitutes for classical metallic ringstiffened pressure hulls. Submarine designs can have a single or double hull system that contains all the important systems and manpower to complete their missions. The paper presents an alternative design for a submarine pressure hull without ringstiffeners, where shell instability and general instability are resisted by making the pressure hull of a swedged shaped form. Depth is one of the most important and deciding structural design criteria. Under uniform external hydrostatic pressure, a submarine pressure hull can buckle through shell instability or lobar buckling at a pressure ross, 1965. Probabilistic ultimate strength analysis of submarine. Stress and stability analysis of a stiffened cylindrical shell including throughthickness shear by lieutenant n p. Of course, we could be lousy engineers and build walls one meter thick, making our submersible incredibly strong. It was somewhat commonly used in the early stages of submarine development, but was gradually abandoned in the early 20th century in favour of designs optimized for high performance on the surface as a result of flawed naval doctrine. Mechanical engineering university of new brunswick, 1984 submitted to the department of ocean engineering on may 17, 1995 in partial fulfillment of the. Unlike ships, submarines travel smoothly underwater and can be powered by nuclear reactor or fuel to propel it.
A teardrop hull is a submarine hull design which emphasizes submerged performance over surfaced performance. In this paper, the optimum design of elliptical composite deepsubmerged pressure hull under hydrostatic pressure is investigated based on the finite element analysis to. Table 1 illustrates the advantages and disadvantages of. We assigned the remaining rooms and tanks in the pressure hull with design variables for the optimization process. Submarine pressure hull design diving depths between the wars by d. Submarine pressure hull design and the application of. Imaging, instruments, interconnect, seismic and vehicles. Optimization of submarine ring stiffened composite. Submarines have quite thick hulls, both to resist pressure due to depth, and to give some protection against damage by torpedoes. The outer hull is simply a smooth fairing that covers the non pressure sensitive equipment of the submarine such as main ballast tanks and anchors to improve the submarines.
527 397 1335 1454 833 1198 914 1507 887 1237 1412 603 275 1229 1073 599 1185 234 38 185 1375 1242 1007 918 1321 101 1486 277 1151 610 58 653 90 262 721 252 462 168 147