Ice breaker aft
SUBSTANCE: ice breaker aft comprises ice breaking ledge rigidly secured at stem-post in the ship centre line and arranged behind rudder blade along ship motion. Top end of rudder blade turn axle extends thorough stem-post while bottom end is secured at the heel rigidly secured with keel. Said rudder blade turn axle is arranged on the side of ice breaking ledge side, said ledge being rigidly coupled by vertical prop with appropriate end of said heel to make a vertical protective frame around rudder propeller unit. Vertical prop rear edge is sharpened. Ice baffle plates are rigidly secured on both sides of stem-post at acute angle to horizontal plane at ship hull underwater surface, free ends of said plates are lowered under secured edges by at least to the level above below screw top edge. Distance from rudder blade turn axle to its rear edge does not exceed the radius of curvature described by said edge.
EFFECT: better controllability in reverse motion, higher reliability of rudder propeller protection.
3 cl, 3 dwg
The invention relates to shipbuilding, in particular to the structure of the aft ends of the ice ship.
Known design of the ship ice navigation, in which stern extremity contains legresy ledge, rigidly attached to aftershave in a diametral plane of the vessel, and located behind the rudder in the direction of motion of the ship, and the rudder attached to aftershave rotatably in a vertical plane (see RF patent 2286908, IPC WV 25/12, WV 35/08, WV 3/20, WV 3/60, 2006).
As the closest analogue adopted the aft end of the ship ice navigation containing legresy ledge, rigidly attached to aftershave in a diametral plane of the vessel and located behind the rudder in the direction of motion of the vessel, with the upper end of the axis of rotation of the rudder blade is passed through aftershaving, and the bottom is placed on the heel, rigidly attached to the keel (see and.with. The USSR №831658, IPC WV 3/40, 1981).
The drawbacks are the low controllability of the vessel and the insufficient protection of the propulsion system.
The problem to be solved by the present invention is the design of the aft ship ice navigation, providing reliable protection of the propulsion system of a vessel.
The technical result, the achievement�recover when solving the tasks, is expressed in improving the manageability of the vessel when it is reversing and increasing the reliability of protection of propeller-rudder system, especially when relaying rudder on any of the sides of the vessel.
The problem is solved in that in the aft of the ship ice navigation containing legresy ledge, rigidly attached to aftershave in a diametral plane of the vessel and located behind the rudder in the direction of motion of the vessel, with the upper end of the axis of rotation of the rudder blade is passed through aftershaving, and the bottom is placed on the heel, rigidly attached to the keel axis of rotation of the rudder blade posted by liderazgo of the ledge, which is rigidly connected a vertical column with the corresponding end of the heel, forming a vertical protective frame around the propulsion system, and the rear facing edge of the vessel upright pointed, and on both sides of aftershave, at an acute angle to a horizontal plane, on the underwater surface of the hull is rigidly mounted chippers ice-free edges are lowered below the fixed edges at least at a level below the upper edge of the screw, in addition, the distance from the axis of rotation of the rudder blade up to his rear in the travel direction of the vessel edges is not greater than the radius of curvature described by this edge.
In addition, ice chippers same�TKO connected with a horizontal thrust, missed in the gap between the screw and rudder blade. In addition, chippers ice is made in the form of the pointed triangles, acute vertex of which is oriented in the direction of motion of the vessel.
Comparative analysis of the essential features of the proposed technical solutions and the essential features of the prototype and analogues demonstrates its compliance with the criterion of "novelty."
At the same features of the claims solve the following functional tasks.
The sign of "the axis of rotation of the rudder blade posted by liderazgo of the ledge, which is rigidly connected a vertical column with the corresponding end of the heel, forming a vertical protective frame around the propulsion system provides protection for the propeller-rudder system in the vertical plane along the entire height of the rudder blade when the vessel is in reverse as in the forward position of the rudder, and when it is relaying on any of the sides of the vessel.
The symptom of "rear facing edge of the vessel upright pointed" provides the possibility of splitting the ice during their contact with vertical stand or offset to the side of the vessel when it is reversing.
Signs "on both sides of aftershave, at an acute angle to a horizontal plane, on the underwater surface of the hull rigidly fix�; ice chippers, available edges are lowered below the fixed edges, at least on the level below the upper edge of the screw" and "chippers ice is made in the form of the pointed triangles, acute vertex of which is oriented in the direction of motion of the vessel" protect the propulsion system when driving the vessel forward course, with the ice chippers are arranged in such a way as to prevent contact of ice with the propeller-rudder complex, regardless of the rudder angle of the rudder blade.
The sign of "the distance from the axis of rotation of the rudder blade up to his rear in the travel direction of the vessel edges is not greater than the radius of curvature described this edge provides improved controllability of the vessel when it is reversing. When shifting the rudder and vertical strut to form the profile of the concave-convex shape, which significantly increases created by the rudder blade side force. Also, when relaying rudder reduced the likelihood of jamming of the ice in the space between a vertical column and rudder blade, because its rear edge in terms not substantially beyond the lateral surface of the vertical uprights.p>
The symptom of "ice chippers are rigidly interconnected by a horizontal rod passed into the gap between the screw and rudder blade" enhances the strength of the bump of ice under the action of lateral ice �of agrusti and improvement of spatial stiffness of the vessel.
Fig. 1 shows a side view of the stern of ice navigation.
Fig. 2 shows a rear view of the aft of the ship ice navigation.
Fig. 3 shows a diagram of the device in the vessel ahead or astern.
The drawings show legresy the ledge 1, aftershaving 2 ship, the rudder 3, the axis of rotation 4 of the rudder 3, the heel is 5, the vertical strut 6, the rear facing edge of the vessel 7 the upright 6, the screw 8, the housing 9 of the vessel, chippers ice 10, the horizontal rod 11.
Legresy ledge 1 rigidly secured to aftershave 2 in a diametral plane of the vessel and located behind the rudder blade 3 in the direction of motion of the vessel.
Legresy ledge 1 is rigidly connected vertical stand 6 with the free end of the heel 5, forming a vertical protective frame around the propulsion system, comprising a rudder blade 3 and the screw 8. The rear facing edge of the vessel 7 the upright 6 pointed.
The axis of rotation 4 of the rudder blade 3 posted by liderazgo ledge 1, and its upper end is passed through aftershaving 2, and the lower end is placed on the heel 5, rigidly attached to the keel of the vessel (not shown).
The distance from the axis of rotation 4 of the rudder blade 3 to the rear in the travel direction of the vessel edges is not greater than the radius of curvature described by this edge.
Chippers ice 10 ill�to fixed on the underwater surface of the hull 9 on both sides of aftershave 2, at an acute angle to the horizontal plane, with their free edges bent below the pinned edges at least at a level below the upper edge of the screw 8. The ice chippers 10 made in the form of the pointed triangles, acute vertex of which is oriented in the direction of motion of the vessel and rigidly connected with a horizontal rod 11 is passed into the gap between the screw 8 and the rudder blade 3.
The inventive device operates as follows.
When the vessel is moving forward course along the body 9 of the vessel ice floes, going to feed the valance (the drawings are not specified), come into contact with the ice chippers 10 and move them along towards the rear end. Chippers ice 10 are arranged in such a way as to prevent contact of ice with the screw 8 and the rudder blade 3 regardless of the angle of the rudder.
When the vessel is in reverse ice come into contact with the vertical stand 6 protecting the rudder blade 3 along its entire height.
In the case where the rudder 3 is located in a diametral plane of the vessel, the rear facing edge of the vessel 7 the upright 6 in contact with the ice splits it into two parts, the rudder 3 and a vertical stand 6 form a single streamlined profile.
When shifting the rudder blade 3 on any of the boards as a result of contact the ice and back along the d�izheniya vessel edges 7 of the upright 6 is offset from the ice to the side of one of the sides, the rudder blade 3 and a vertical stand 6 to form the profile of the concave-convex shape. Moreover, the trailing edge of the rudder blade 3 in terms of not substantially beyond the lateral surface of the upright support 6, which reduces the likelihood of jamming of the ice in the space between vertical stand 6 and the rudder blade 3.
Thus, the proposed technical solution provides high controllability of the vessel and protection of the propulsion system of the ship ice navigation when driving in ice.
1. The aft end of the ship ice navigation containing legresy ledge, rigidly attached to aftershave in a diametral plane of the vessel and located behind the rudder in the direction of motion of the vessel, with the upper end of the axis of rotation of the rudder blade is passed through aftershaving, and the bottom is placed on the heel, rigidly attached to the keel axis of rotation of the rudder blade posted by liderazgo of the ledge, which is rigidly connected a vertical column with the corresponding end of the heel, forming a vertical protective frame around the propulsion system, and the rear facing edge of the vessel upright pointed, and on both sides of aftershave at an acute angle to the horizontal plane on the underwater surface of the hull is rigidly mounted chippers ice-free edges of which are omitted lower� pinned edges, at least on the level below the upper edge of the screw, in addition, the distance from the axis of rotation of the rudder blade up to his rear in the travel direction of the vessel edges is not greater than the radius of curvature described by this edge.
2. The aft end of the ship ice navigation according to claim 1, in which the ice chippers are rigidly interconnected by a horizontal rod passed into the gap between the screw and rudder blade.
3. The aft end of the ship ice navigation according to claim 1, in which the bump stops ice is made in the form of the pointed triangles, acute vertex of which is oriented in the direction of motion of the vessel.
FIELD: transport engineering.
SUBSTANCE: method is implemented by creation ship trim by the stern, and buoyancy force due to drainage of the ballast tanks. At that the ship is provided with additional buoyancy force that is periodically changed with frequency equal to natural frequency of the resonance bending-gravitational waves generated in ice cover by pulse load.
EFFECT: increased efficiency of ice destruction by submarine.
SUBSTANCE: device is proposed to damage ice cover comprising an underwater vessel equipped with ballast cisterns, due to drying of which a trim is created to a stern and buoyancy force. In the bow there is a container with a reservoir in it, walls of which are made of corrugated elastic material. Inner sides of the container are equipped with remotely controlled relief valves, and the reservoir itself with the help of a flexible hose is connected with a source of compressed air, is attached to the bottom of the container with the help of slings, and being straightened by supplied air it acquires toroid shape.
EFFECT: increased efficiency of ice cover damage by an underwater vessel.
SUBSTANCE: invention relates to ship building, particularly, to ice breaker vessels and pusher tug to be operated in shallow iced areas. Ice breaker comprises hull with sledge-type stern counter and steering mover complex arranged in the latter and including two paddle propulsors arranged on sides as well as two whirligig steering columns provided with two propeller screws and arranged in symmetry about the ice breaker centre line. Stern counter at structural waterline area features ice breaking shape with expressed wedge-shape with taper angle in waterline making 90-180 degrees and with surface inclined to vertical , at least 30 degrees. Ice-protection nose is formed in stern counter perimeter, features wedge-like cross-section and does not extend beyond ship hull. Said nose extends in fore direction beyond the screw propeller disc plane by magnitude not exceeding two diameters of said propulsors. This nose features height whereat its bottom edge at stern is spaced from rotational axes of screw propellers by at least half the radius of said propellers.
EFFECT: better manoeuvrability in ice.
SUBSTANCE: invention relates to ship building, particularly to ice breaking facilities operated in combination with tug. Propose ice breaking adapter pushed by pusher tug is intended for making of navigable waterways in ices. Adapter hulls are composed of front and two lateral rigidly interconnected frame structure for tight contact with pusher tug. Said hulls feature a broken flat stern in shape approximating to triangle at waterline level. Lateral hulls feature equal width and are shifted downward from the main hull so that the line extending through their stems level with the waterline is spaced from the parallel line extending level with waterline through main hull stem-post at least 0.1 of the main hull width in its midship. Said lateral hulls are located on both sides from the main hull so that their midship planes are spaced from ice breaker midship plane by distance I defined by the formula: m, where Bf and Bl are widths of the front and lateral hulls in midship plane. Device for tight contact of said adapter with pusher tug is arranged at frame structure to extend by magnitude b making at least 3 m beyond the line passing through lateral hull stem-posts.
EFFECT: higher safety of navigation in ice.
SUBSTANCE: invention relates to ship building, particularly, to surface scientific and research vessels. Scientific and research icebreaking vessel is proposed for carrying out 3D seismic technology exploration irrespectively to ice conditions which vessel has a hull where seismic equipment is located, as well as a shaft for bay cable laying. To move source of acoustic waves untethered unmanned submersible is used which bases on a vessel and is dropped and lifted via separate vertical shaft using running - pulling tool.
EFFECT: improved operational performance of scientific and research vessel for seismic exploration.
3 cl, 1 dwg
FIELD: physics, navigation.
SUBSTANCE: invention relates to seismic survey of underwater oil and gas deposits in Arctic seas. Disclosed is a vessel having a design which combines the advantages of a surface ship (high level of habitability, safety and a large deck area which enables maintenance and repair of seismic survey equipment) and advantages of a multipurpose underwater station, particularly use of hydroacoustic emitters and seismic cables towed in water under ice for 2D seismic survey. The towed seismic cables and hydroacoustic emitters are released using extensible structures mounted in vertical shafts in the bottom part of the vessel outside the ice region.
EFFECT: high reliability of seismic survey in ice conditions, reduced negative impact of seismic survey on the environment and marine ecology.
4 cl, 1 dwg
SUBSTANCE: invention relates to design of hull lines of a ship hull with higher icebreaking capability having a stem with a bulb. Eyes of a ship hull are proposed, having a bottom in the area of a midship frame with low or zero deadrise and boards close to vertical ones, comprising a bulb having in its upper part a straight or slightly bent rib, formed in the diametral plane during connection of the right and left surfaces of the bulb at the spatial angle of 30-150°, having an inclination forward to 30° to the plane of the waterline and crossing planes (levels) of the highest and lowest positions of the rated waterline of the ship in the head for different versions of its load. The upper surface of the bulb is made with gradual rise from its front part to the area of coupling with main hull lines, the length of the body part of the bulb in the longitudinal direction makes 4-5 theoretical spaces. Cross sections of the bulb vary slightly along the width from 1 to 3 of the theoretical frame. Coupling of the eyes with the bulb lines is made to form concavity of buttocks, stretching at the angle downwards from the start of coupling on the stem to the area of approximately 3-4 of the theoretical frame.
EFFECT: increased icebreaking capability of a ship and speed of its movement.
5 cl, 3 dwg
SUBSTANCE: icebreaker fore end, including hull fore end lines of optimal shape, contains board rotary units for creation of wells in thick ice as icebreaker is moving. Each of rotary units is made as changeable hollow cylinder with cutting elements in the form of diamond teeth on lower part - coring bit with changeable coaxial auger bit inside it. Coring and auger bits have independent drives of axial rotation around vertical axis with reversing and device for bit feeding into wells.
EFFECT: higher icebreaker capability to go through Arctic thick ice fields.
SUBSTANCE: method is proposed to break ice cover, in which a pushing buoyant force is developed during motion of a semi-submersible ship, which presses at the lower surface of ice in vertical direction, and ice is broken with a ram brought under it with an ice-breaking rib connected to the ship body. The vertical pushing force is developed by all positive buoyancy of the semi-submersible ship and lifting force of its horizontal hydrodynamic rudders, at the same time the ram acts at ice in horizontal direction both by its inclined breaking rib and its entire surface. Also a semi-submersible icebreaking ship is proposed.
EFFECT: increased efficiency of ice cover breaking and icebreaking capability for transportation of loads.
8 cl, 9 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to preventive jobs aimed at prevention of ice jams formation at river section and can be used for softening of ice cover at areas of underwater communications. Ice cover cleaned of snow is blacked to arranged ice bulky lens. The latter focus sun rays at blacked surface and inside ice cover.
EFFECT: accelerated destruction.
SUBSTANCE: proposed vessel consists of three modules. Mail and fuel hulls are arranged, each, at hydrofoil. Main hull with fuel hull and fuel hull with gliding tug are connected for vertical displacement. Water jet turbopump inlet and outlet are aligned at front view. Outlet pipe in projection on vertical plane is inclined to gliding site at 45 degrees. Turbojet is arranged at top section of transom area and is equipped with free turbine engaged with water-jet turbopump. Proposed airfoil vessel consists of three modules. Main hull with gliding site and airfoil can displace horizontally. This vessel is equipped with high-lift device.
EFFECT: lower drag, higher hydrodynamic properties, enhanced performances.
4 cl, 3 dwg
SUBSTANCE: catamaran comprises two parallel hulls with connection elements, venting unit with drive mounted at catamaran fore and channels for air feed from the plant. Both hulls feature a flat-bottomed design. Outlet ends of said channels are directed to hull bottom at acute angle. Note here that said outlets of channels are made in said bottom as crosswise slits or rows of holes made uniformly over the bottom length.
EFFECT: higher speed, power savings in motion under water.
SUBSTANCE: collapsible catamaran comprises two floats, collapsible carcass, composite connectors and connecting fasteners. Said floats are furnished with eyebolts, crosswise stability stabilizers, fore baffle plate, lower and upper support levers. Cabin collapsible carcass consists of vertical props, lengthwise and crosswise plates. The latter are provided with sleeves and angle pieces consisting of brackets, left and right shaped angle pieces, lateral and inner angle pieces.
EFFECT: simplified design, higher strength and reliability, better mobility and stability.
2 cl, 4 dwg
SUBSTANCE: hydrocycle includes hull, engine, clutch coupling, reducing gears, control mechanisms. The hull is made streamlined, cigar-shaped, with front transverse step and flat bottom. In the upper part of hull, driver's seat is installed at the sides of which horizontal stabilisers with elevating rudders are fixed. After stabilisers, water-aerial rudder is installed. Inside the middle part of body, through cylindrical channel is made which opens to top surface of hull and ends on flat surface of bottom behind step and is covered from top and from bottom by safety grids. In the upper part of through cylindrical channel, axial-flow air blower is installed behind which antivirtex device is placed. The engine is placed in the fore part of hull, revolving reducing gear and intrachannel reducing gear are connected with axial-flow air blower via clutch coupling. On the top part of hull, T-shaped handle is installed with possibility to turn in horizontal plane and kinematically connected water-aerial rudder and right and left elevating rudders and with possibility of separate turning in vertical plane.
EFFECT: improved technical characteristics of vessel.
FIELD: engines and pumps.
SUBSTANCE: invention relates to shipbuilding and can be used also for fabrication of propeller screws for various vessels. For fabrication of the propeller helicoid screw a screw shaft is designed with a possibility of rotation, on the surface of which the blades of the propeller screw of the vessel hull are provisioned in series. The shaft is designed as two halves the end of which is hinge-jointedly placed in an active clamp. The active clamp is fixed in a middle part of a rigid cover with round surface from its bottom side and they are connected functionally with the machine for transfer of the rotation moment to them. The opposite ends of two halves of the shaft are hinge-jointedly placed in a passive clamp which is fix in the top part of the linear rigid cover with a round surface of its opposite sides.
EFFECT: decrease of speed of rotation of running screws is achieved.
SUBSTANCE: invention relates to ship building, particularly to high-speed boats made of polymer composites. This crosswise hollow step is made of polymer composite comprises outer skin and damping elements composed by at least one plate (horizontally arranged diaphragm) located inside the step between skins of the vessel and step to connect vertical lengthwise diaphragms in height decreasing to vessel fore. Note here that lengthwise diaphragms on top and bottom sides of damping elements are shifted in crosswise direction relative to each other. Lengthwise diaphragms and sidewall with skin and damping elements are glued together with the help of thrust foam plastic to be secured to the skin and damping elements and covered by one or several plies of reinforcing material. Vulcanising-on angle-pieces are welded on step sidewalls and step skin. Step cavities arranged one above the other in one or two lengthwise cross-sections of the vessel (relative to ship centreline plane) are filled with high-density foam plastic.
EFFECT: decreased shock loads, lower drag on rough sea.
3 cl, 5 dwg
SUBSTANCE: proposed device comprises casing shaped to hollow truncated cone. Cone is shaped to vessel hull sizes and has its cross-section directed along motion. Case aft is provided with water-jet propulsor secured at sliding joints with clearance between cone case walls and those of water-jet propulsor.
EFFECT: higher efficiency, lower drag and noise.
SUBSTANCE: invention relates to navy exploiting high-navigability and high-speed vessels with power plants running on hydrogen fuel and the product of thermal dissociation of steam, that is, hydrogen and oxygen. Note here that sweet water stored in tanks is used as a heat carrier. This vessel comprises surface hull mounted at streamlined supports of underwater hulls, starting steam plant arranged in surface hull, sweet water tanks, main power plants with steam condensers to use sweet water as power carrier to produce useful power. Said power plants include gas turbine plant and steam plant engaged by shaft with electrical generator connected in electrical protection hardware. Steam units running of used hydrogen and oxygen of thermal dissociation gas turbines are connected via steam lines with steam collectors and plasma chemical heaters of said main power plants and refrigerators for cooling of said used hydrogen and oxygen. Steam units are connected to cooling system running on liquid metal heat carrier of the main power plants connected to steam turbines connected to electrical generators connected to switchboards and to capacitors. Plasma chemical heaters and reactors with their power supplies, motors connected with screw propellers are arranged in underwater hulls. It differs from known designs in that thermal dissociation gas turbine to produce useful power, hydrogen and oxygen incorporates plasma chemical heaters arranged regularly in circle to heat steam to temperature over 2000°C.Said plasma chemical heaters are connected to power supply and connected, on one side, via valve gear with high-temperature and high-pressure steam collector and, on opposite side, with reactors for thermal dissociation of steam to produce hydrogen and oxygen their temperature exceeding 2500°C. Threes are connected to power supply including HF generators and capacitor bank connected with diverging nozzles and cylinders of wave compressors. The latter incorporate water or liquid metal injectors connected to gas turbine fitted on the shaft engaged with electrical generator. Said turbine is provided with discharge pipe to force used hydrogen and oxygen into steam unit. Or, thermal dissociation gas turbine incorporates plasma chemical reactors for thermal dissociation of steam and production of hydrogen and oxygen with temperature over 2500°C and high pressure. Said reactors are connected via valves gears with high-pressure and high-temperature steam collectors on one side and, on the other side, with cylinders connected to aforesaid diverging nozzle and cylinders of wave compressors provided with water or liquid metal injectors connected with gas turbine. Said turbine is provided with discharge pipe to force used hydrogen and oxygen into steam unit. Also, it differs in that plasma chemical heaters, plasma chemical reactors for thermal dissociation of steam and production of hydrogen and oxygen with temperature over 2500°C, or plasma chemical reactors, diverging nozzles and wave compressor cylinders are provided with jackets for circulation of aforesaid coolants for cooling reactors for thermal dissociation of steam and production of hydrogen and oxygen with temperature over 2500°C and high pressure. Also, it differs in that plasma chemical heaters or reactors incorporate housing with jacket, cover and cap and electrode-cathode secured in housing, in electric insulation ply. Said cathode communicates with cooled nozzle, the anode, arranged at the angle to axes of said reactors. Or, plasma chemical heaters or reactors are arranged in one unit with light ionising additive injectors built therein and arranged in the axis of reactors. Note here that valve mechanism with high-pressure-and-temperature inlet valve is arranged at plasma chemical heater housing. Also, it differs in that valve mechanism comprises steam feed pipe and discharge valve with constrictor and spring. The latter is composed of tubular slider plugged on one side and fitted in cylinder secured at the housing. Said cylinder has openings in it and inlet valve tubular slider walls to intake steam in plasma chemical heater or reactor. Its differs in that said reactor is made of ceramic material with circular inductor arranged thereon and composed of copper pipes with jacket for circulation and cooling of reactor walls and inductor by water. Also, it differs in that steam plat for combustion of hydrogen and oxygen incorporates axial compressor connected with long pipes, combustion chambers arranged regularly in circle. They include injectors to ignite hydrogen in oxygen by injection of gaseous jets of conducting fluid thermal dissociation products with diverging nozzles and wave compressor cylinders connected to steam turbine. The latter is fitted on shaft engaged with electrical generator and incorporates branch pipe to discharge used steam into condenser. Besides, it differs in that said injector comprises casing with conducting liquid feed pipes. Said pipes are connected to cylindrical channels arranged inside the casing in insulating material ply. Electrodes connected to pulse generator are arranged on one side of said channels while, on opposite side, nozzle are arranged directed at the angle to each other and communicated with blast chamber of injector that has perforated bottom for escape of gas jets.
EFFECT: clean atmosphere.
SUBSTANCE: invention relates to ship building, namely to marine propulsors for shallow-water flat-bottomed vessels. The marine propulsor contains pressurised water supply pipeline and nozzle. Vessel's fore end is made at the front as part of cylindrical or spherical shell. On the front outside surface, water is pumped under pressure from nozzle from above or from above-behind. This water spreading down over shell surface and interacting with water beneath waterline of flat-bottomed vessel creates pushing force.
EFFECT: creation of traction force.
4 cl, 4 dwg
SUBSTANCE: hull lines and structural layout are proposed for an afterend of an underwater semi-submersible large-tonnage ship with protruding parts.
EFFECT: reduced resistance of shape to ship motion, increased coefficient of use of cargo volume, optimal placement of EU and a rudder propeller unit for improved controllability.
6 cl, 4 dwg
FIELD: shipbuilding; manufacture of ship stabilization systems equipment with deeply-submerged hydrofoils.
SUBSTANCE: proposed marine hydrofoil is provided with units for determination of its speed and depth of submergence mounted on it and connected to shipboard computer. Mounted additionally on hydrofoil are units for determination of side slip and angle of attack which are also connected to shipboard computer.
EFFECT: enhanced efficiency.