115 results about "Naval architecture" patented technology

Belonging to the field of naval architecture and ocean engineering, the invention relates to a three dimensional visual simulator system device of ship driving and cabin operation. Based on a distributed mathematical physics platform model and a distributed ship operation principle, the device of the invention comprises six operational modules: (1) a power system mathematical physics equation modeling module, (2) a three dimensional display module, (3) a climate environment change display module, (4) a geographical information environment change display module, (5) a digital glove interactive operation module, and (6) a physical platform simulation operation module. The above modules are integrated into one physical platform, to solve the problem of integration between various modules. Specifically, three dimensional display, the database exchange technology and the digital glove interaction technology are integrated into one platform. Physical operation is used to replace keyboard event response, and scene change is used to replace ship navigation and cabin operation, to achieve the purpose of simulating ship steering and cabin operation.

The invention belongs to the technical field of ship engineering and relates to a ship dynamic positioning control method. The ship dynamic positioning control method comprises the following steps that model identification is conducted on a ship dynamic movement model, and a support vector machine predicting model is established; surging, swaying and yawing directions of a ship power positioning system are preset according to expected positions and postures, the support vector machine predicting model is embedded into a general predict controller, and the surging, swaying and yawing movements are respectively controlled; the general predict controller applies three torques in the surging, swaying and yawing directions to the ship dynamic movement model through a thrust distribution module and feeds back surging and swaying displacement and a yawing angle, and a closed-loop feedback control system is formed to control the ship power positioning system. The ship dynamic positioning control method has the advantages of multiple steps of predicting, rolling optimization and feedback compensation mechanisms, a good control effect on a ship, high positioning precision and the like. In addition, the ship dynamic positioning control method can be automatically applied to ship loading, sea condition variation and the like.

The invention relates to a mounting method of an integral stern shaft tube on naval architecture and ocean engineering. The mounting method is used for special tools, and the special tools comprise a conveying plate and an idler wheel support. The mounting method specifically comprises the following steps: firstly, assembling the integral stern shaft tube with the conveying plate integrally, and connecting a steel wire rope with the conveying plate; secondly, mounting the idler wheel support on a ship structure in the subsection of the stern shaft tube in advance; thirdly, lifting the assembled conveying plate and integral stern shaft tube in a dock, and putting the bow end part of the integral stern shaft tube in the ship structure at the subsection of the stern shaft tube; stretching the steel wire rope to a stern engine room area; fourthly, pulling the steel wire rope until the integral stern shaft tube is in place primarily; fifthly, accurately adjusting the position of the integral stern shaft tube in exact place, and effectively fixing the integral stern shaft tube. According to the mounting method disclosed by the invention, the integral stern shaft tube can be effectively prevented from colliding, so that the mounting workload of stern tube assembly is reduced, and the mounting quality and efficiency of the integral stern shaft tube are improved.

The invention belongs to the field of ship engineering, control science and control engineering, and relates to a ship heading sea wave filtering method based on the passive theory. The ship heading sea wave filtering method based on the passive theory comprises the steps that a ship heading mathematic motion model with sea wave perturbation is established; a non-linear Luenberger observer is established; the observance gain coefficient of the non-linear Luenberger observer is collected and parameters, consistent with the passivity condition, of an observance error system are obtained. According to the ship heading sea wave filtering method, estimation of ship low-frequency motion, sea wave high-frequency perturbation and offset states is completed through state reestablishment of ship heading motion and sea wave filtering, due to the fact that the passive theory is introduced, the method does not need variance information of sea wave perturbation and measurement noise, the number of the parameters which need to be adjusted is effectively reduced, and engineering realization is easy.

This invention refers to a kind of wall-climbing air-free robot which works on the planking of the ship and the operational method of this robot, which belongs to the technological field of the intelligent construction of the equipment in naval architecture and marine engineering. The system mainly consists of a diamond-shaped main frame, a magnetic adjustable device, a driving mobile mechanism, a sweeping and protective device of the spraying head, a piping system with the function of supplying materials and a piping system to recycle the painting mist. There are four features of this kind of technology. Firstly, it is by equipping the back of the driving wheel with the spraying head that the spraying head can be dragged to paint and the rolling mark can be avoided in the processing of painting. Secondly, it is by applying the protective cover to the spraying head that the painting mist can be recycled and the pollution of it can be prevented. Thirdly, the spraying head can imitate the operational method of the artificial painting work by moving itself transversely. Fourthly, the length of the traversing screw is longer than the gauge of the driving wheel, which ensures that the reciprocating moving trail of the robot can be covered. Finally, the painting mist heater is adopted to prevent the congestion of the piping system caused by solidification of the painting mist under the low temperature. The towing pipe carried by the robot can always be freely downward without perking by the application of the free rotary connector and the extra bending force of the towing pipe can also be prevented by using this free rotary connector. This invention is safe, reliable and highly efficient and it is full of engineering application value.

The invention belongs to the technical field of anti-corrosion of naval architecture and ocean engineering and relates to a method for simulating and optimizing a numerical value of an anti-corrosion system of the naval architecture and ocean engineering. The method is characterized by comprising the following steps of: geometrically modeling, establishing a boundary element model, and meshing an established geometric model; loading digitalized sacrificial anode information on the basis of the boundary element model; calculating a coefficient matrix, initializing a piecewise linear relation, solving a system of linear equations, and carrying out relevant judgment to finally obtain a calculation result; visualizing the calculation result in a form of cloud charts or curves; and re-arranging a sacrificial anode to obtain an optimal cathode protection system. The invention has the advantages that: by the method, the total anti-corrosion performance of an ocean structure can be more comprehensively described, and an optimization design scheme is provided, so the service life of the ocean structure is prolonged; meanwhile, the full automation of the whole calculation process is realized by programming software, so the method has a practical engineering application value.

The invention discloses an SPAR platform hard tank comprising a central column and peripheral columns distributed around the central column; wherein, the diameter of the central column is bigger than that of the peripheral column, and the size of the central column is suitable for arranging a central well; top decks of the peripheral columns are arranged below the still water level, and the amount and the diameter of the peripheral columns can be determined by buoyancy needed by the SPAR platform or the SPAR platform hard tank. The invention is characterized in that the top decks (1) of the peripheral columns (7) can be horizontal plane or can be arranged in slope. The invention can lower building difficulty and cost, satisfies the condition of arranging the central well, and realizes that a TTR vertical pipe is adopted to carry out oil extraction operation; meanwhile, wave-current force to the SPAR platform in the horizontal direction is reduced, and the requirements and cost for an anchoring can be lowered. The invention is suitable for relevant fields such as naval architecture, ocean engineering and the like and is suitable for explorations of petroleum, natural gas and the like from deep water sea areas to extremely deep water sea areas.

A linked anti-collision platform of deep sea fishing boats belongs to the field of ship engineering and comprises a ship body, right connection rods, connectors, an antenna, back connection rods, left interfaces, front interfaces, a fishing boat a, a fishing boat b, a fishing boat c, a fishing boat d, a single chip microcomputer, an input module, a positioning module, a wireless module, an engine, helms, a right connection rod device and a back connection rod device. The two right connection rods which are hydraulic telescopic rods are arranged on the right side of the ship body, and the connectors are installed at the tail ends of the right connection rods. The two back connection rods which are hydraulic telescopic rods are arranged on the stern portion of the ship body, and the connectors are installed at the tail ends of the back connection rods. The two front interfaces are arranged on the bow portion of the ship body, and the left interfaces are arranged on the left side of the ship body. The back connection rods of the fishing ship a are fixedly connected with the front interfaces of the fishing ship b through the connectors, the right connection rods of the fishing ship c are fixedly connected with the left interfaces of the fishing ship b through the connectors, the back connection rods of the fishing ship d are fixedly connected with the front interfaces of the fishing ship c through the connectors, and the right connection rods of the fishing ship d are fixedly connected with the left interfaces of the fishing ship a through the connectors.

The invention discloses a vibration stopping structure of a container ship lashing bridge, belongs to the technical field of construction of naval architecture and ocean engineering, and solves the problems that a traditional lashing bridge, a propeller and a main engine easily generate a resonance phenomenon, and all sorts of damages on shipping engineering and passengers can be easily caused. The vibration stopping structure of the container ship lashing bridge mainly comprises two symmetric square tube inclined strut supports which are arranged on adjacent lashing bridges, and roots of thesquare tube inclined strut supports drop on a main deck or an H-shaped beam fixedly connected with the deck. The vibration stopping structure of the container ship lashing bridge is skillful in design, simple in structural design, easy to manufacture, low in manufacturing cost and convenient to construct, the probability of occurrence of lashing failure events is greatly reduced, the safety is quite high, and generated concealed economic value and social value are quite high; and the lashing operation environment of sailors is greatly improved, the ship navigation safety and comfort level of the sailors are improved effectively, and the vibration stopping structure of the container ship lashing bridge can be widely applied to the technical field of construction of the naval architecture and ocean engineering.

The invention discloses a hull plate paint-spraying wall climbing vehicle device carried on an aerial lift vehicle and a work method thereof, and belongs to the technical fields of naval architecture and ocean engineering and machinery automation. According to the hull plate paint-spraying wall climbing vehicle device, a wall climbing vehicle carries spraying nozzles to carry out spraying operation, so that labor intensity is lowered. A multi-spraying-nozzle spraying mode is adopted, so that the work efficiency is improved by many times, and the work period for hull plate spraying is shortened. A paint mist recovery cover mechanism adopted above the spraying nozzles can effectively suck paint mist generated in the spraying process through negative pressure, so that the toxic action of the paint mist to operators is reduced. The aerial lift vehicle is connected with the wall climbing vehicle, so that the load bearing capacity of the wall climbing vehicle is remarkably improved, the risk of accidental falling of the wall climbing vehicle can be completely eradicated, and the safety of the wall climbing vehicle during spraying operation is increased. A material supply cart integrating a stirring function, a material supply function and a paint mist recycling function is mounted on the rear portion of the aerial lift vehicle and can automatically complete the operation of paint pumping from a paint barrel, stirring, material supply and paint mist recycling, and direct contact between the operators and paint is reduced.

The invention discloses a test system of a maritime replenishing device and belongs to the technical field of ship engineering. The test system of the maritime replenishing device comprises a test foundation, a pulley assembly, a steel wire rope, a sliding rail trolley and a sliding rail. The pulley assembly comprises movable pulleys, fixed pulleys and an oil cylinder. The cylinder block end of the oil cylinder and the fixed pulleys are fixedly connected to the test foundation. The movable pulleys are fixedly connected to the piston end of the oil cylinder. The oil cylinder is used for driving the movable pulleys to conduct reciprocating motion relative to the fixed pulleys. The steel wire rope is wound around the pulley assembly, and the steel wire rope is wound around at least one movable pulley of the pulley assembly. The fixed end of the steel wire rope is fixedly connected to the test foundation. The movable end of the steel wire rope is connected to one end of the sliding rail trolley. The other end of the sliding rail trolley is used for being connected with a ropeway of the maritime replenishing device. The sliding rail is fixed to the test foundation. The sliding trolley is arranged on the sliding rail in a sliding manner. The movable end of the steel wire rope is arranged in the length direction of the sliding rail.

The invention relates to a photoelectric double-channel automatic watching following semi- diving device, belonging to ship engineering technical field, comprising a casing, vertical and horizontal tail fins, reversible screw propeller, top frame, connection pipe, vent-pipe, power system, vertical and horizontal tail fin executer, photoelectric periscopic window, signal processing encryption and decryption machine, transmitting and receiving energy exchange base array, hydraulic sensor, control system, air compressing bottle, rapid blow valve, ballast tank, water injection system, and water injection valve. The semi-diving device can be completely hidden underwater and can only expose the periscopic window for detecting and encrypts the detected image signal and transmits it in form of water sound wireless signal to the underwater mother boat. The encrypted control instructions emitted by the underwater mother boat are transmitted to the semi-diving device in the data transmission form of water sound digital communication and command the semi-diving device to work after decrypted. The encrypted water sound wireless signal is unable to be modified, broken down, intercepted or utilized by the enemy and can be widely applied to military and civil occasions and the others.

The invention relates to an intelligent anti-pirate infrared-detection cleansing solution sprayer belonging to the technical field of an anti-pirate device in naval architecture and ocean engineering. The sprayer comprises an infrared detector, a controller, a sea communicating pipe, a high pressure water pump, a proportion blender, a spraying device, a double-layer pressure barrel, a pressure water inlet pipe, a cleaning solution storage barrel, a mixed solution pipe and a hand control valve, wherein the spraying device is installed above a cabin door, and the infrared detector is installed near the deck walkway and the cabin door. When pirates come in the detection coverage of the infrared detector, the sprayer can spray high-pressure seawater with the cleaning solution through the spraying device, thereby effectively preventing the attack and the infestation of the pirates. The facility provided by the invention can not cause bodily harm to the pirates, which conforms to the relevant regulations of International Maritime Organization.The sprayer has the advantages of low manufacturing cost, convenient control operation and reliable effect, has remarkable economic benefits and social benefits, and is of great significance for protecting the safety of maritime transportation and maintaining the smoothness of sea lanes.

The invention belongs to the field of ship engineering, control science and control engineering and particularly relates to a rudder rolling stabilizing fuzzy controller with the input constraint based on a T-S model and a control method thereof. The rudder rolling stabilizing fuzzy controller comprises a T-S fuzzy controller module, a ship transverse motion reference model module, a yawing angular speed and rolling angular speed observer module, an analog module of a steering engine servo system and an analog simulation analysis module controlling effects. According to the rudder rolling stabilizing fuzzy controller with the input constraint based on the T-S model and the control method thereof, the influence on the performance of a closed-loop system especially the closed-loop stability by bounded control input is taken into consideration, in addition, after the design of the controller is introduced into the input constraint, abrasion on the steering engine can be relieved to a certain degree, and the rudder rolling stabilizing fuzzy controller with the input constraint based on the T-S model and the control method thereof better conform to the application of practical engineering.

The invention discloses a method for improving cavitation erosion resistance of TC4 titanium alloy based on ion implantation surface modification, and aims at improving the cavitation erosion resistance of TC4 titanium alloy, and expanding the applications of TC4 titanium alloy in the fields of hydraulic machinery, and naval architecture and ocean engineering. The method comprises the following steps of: placing the polished TC4 titanium alloy test sample in an MEVVA (metal vapour vacuum arc) source ion implanter, and using a high-purity niobium bar as an ion implantation source for performing Nb element ion implantation; and then performing a cavitation erosion experiment on the TC4 titanium alloy implanted with the Nb element, measuring the accumulated weight loss of the TC4 titanium alloy and observing the surface appearance after cavitation erosion. The results show that after the Nb element is implanted on the surface of the TC4 titanium alloy, the accumulated weight loss is reduced relatively to the accumulated weight losses of original test samples, and the cavitation erosion resistance is obviously improved.

The invention belongs to the field of ship engineering, and provides a calibration method for a ship true wind measurement device. The method comprises the steps that by constructing a two-axis linkage ship swing simulation platform, a wind tunnel wind flow field is adopted for controlling the ship swing simulation platform to simulate the hull space motion under wind and wave current disturbance,wind direction and wind speed data at different swing angles and different rocking speeds are measured, and a wind direction and wind speed measurement data, attitude measurement data and wind flow field actual wind direction and wind speed database is formed; a calibration model of a BP neural network is constructed by means of the database, a calibration algorithm for the ship true wind direction and true wind speed is formed, and the ship true wind measurement device is calibrated. Accordingly, the dynamic measurement error of the wind direction and wind speed under the ship space motion state is lowered, and accurate measurement of the true wind under the ship motion state is achieved.

The invention relates to the field of ocean ship engineering and discloses a ship real-time monitoring system. The system comprises a shipborne terminal device, a data storage system, a secure video monitoring center, a secure scheduling center, a GPS global positioning system and a smart satellite communication system. Through modular design, photographing images, positions and time information obtained through ship sailing can be sent to the secure video monitoring center and the secure scheduling center by the shipborne terminal device in real time, for smart analysis and ship sailing scheduling arrangement; in order to avoid the fact that the video information needing to be analyzed is too much, various image information storage modes can be selected, and redundant information analysis processing is reduced; external access permission is added to the secure scheduling center, so remote sailing information access authority can be provided for a sailing ship.

The invention belongs to the field of ship engineering, control science and control engineering, and relates to a rudder stabilizing method based on the analytic model prediction control design. The rudder stabilizing method comprises the step of acquiring various coefficients of a control target, the step of collecting rolling angle signals, the step of acquiring rolling angular speed signals, and the step of setting parameter initial values of a controller. According to the rudder stabilizing method, the boundness of uncertain items is fully utilized, analytic model prediction control is used, and the problem that the parameters of a rudder stabilizing control system are uncertain is effectively solved. Compared with other methods, the rudder stabilizing method has the advantages that stabilizing efficiency is improved. According to the rudder stabilizing method, the structure is simple. The rudder stabilizing method is easy to achieve and can meet the requirements of the actual engineering application very well.

The invention relates to a segmental generation method for waves in a towing tank, which belongs to the technical field of marine engineering experimental research. The method is characterized by comprising the following steps that: when an irregular wave simulation experiment is performed in the towing tank, the length of the tank is limited, wave train data of irregular waves are relatively long, and a wave train generated by a wave generator is not finished when a tow truck runs on a track around the whole experimental site at the speed set in the experiment, so that the wave train is divided into segments, when a segment of wave train data are completed, the tow truck is returned to a starting point and is operated again in the next segment of wave train until the wave generator generates the whole train wave; and the acquired experimental data are integrated to form a group of complete wave spectrum simulation experiment processes. The method has the advantages that: the characteristics of irregular wave spectrums can be fully and truly reflected when an effect of the irregular waves on moving ships is researched in the towing tank.

The invention belongs to the technical field of boat engineering, and particularly relates to a convenient-to-regulate equipment arrangement device in a moon pool. The invention provides an equipmentarrangement device for radar, sonar and the like in the moon pool on a boat. The arrangement device has the advantages that the structure is simple; the installation is convenient; the mounting and the dismounting are fast. The monitoring equipment is arranged in the equipment module; the integral assembly is convenient; the equipment module is hung through an ascending and descending machine arranged on a deck derrick; the equipment module and the deck are connected through a deck holding and fastening device, and are assembled with the moon pool through an elastic installing mechanism. The convenient-to-regulate equipment arrangement device has the advantages that the assembly and the dismounting can be completed in a short time; the equipment stress condition can also be monitored in real time in the work process; the safety of the equipment is guaranteed; the economic loss is reduced; the practical engineering significance is realized.

The invention discloses a conductive adhesive for ocean engineering. The conductive adhesive comprises the following components in parts by weight: 15-20 parts of carboxy terminal butadiene-acrylonitrile epoxy resin, 0.05-0.5 part of dispersing agent, 1-1.5 parts of curing agent, 65-75 parts of micro silver powder, 0.08-4 parts of nano-silver particles and 5-10 parts of carbon nanotube. The storage period of the conductive adhesive at the temperature of 5 DEG C is nine months. The conductive adhesive is thermally cured at the temperatures of 100DEG C, 120DEG C and 140DEG C for 1-2 hours respectively. The liquid terminal carboxy butadiene-acrylonitrile epoxy resin and a proper amount of dispersing agent replace epoxy resin which is generally adopted on the market, so that the high-temperature resisting performance is greatly improved; the micro silver powder, the nano-silver particle and the carbon nanotube are added to greatly improve the conducting performance of the conductive adhesive; the electricity conducting and heat conducting carbon nanotube is added to improve the electricity and heat conducting performances of the conductive adhesive; meanwhile, the conductive adhesive has the advantages of excellent corrosion resistance and weather resistance, so that the conductive adhesive is suitable for naval architecture and ocean engineering.

The invention discloses an LNG independent C-type liquid cargo tank structural analysis method considering oscillation loads, and belongs to the field of naval architectures and ocean engineering. The method comprises the steps that 1, a real ship LNG independent C-type compartment is simplified into a theoretical model based on CFD calculation; 2, calculation working conditions are determined as calculation input conditions; 3, mesh generation is performed on the theoretical model, boundary conditions are designated, a turbulent flow and multi-phase flow model is selected, a CFD numerical simulation method is used for obtaining a calculation model flow field result; 4, a structural analysis model of the real ship LNG independent C-type compartment is built; 5, mesh generation is performed on the structural analysis model, material parameters of the structure are designated, and constraint conditions are built; 6, the flow field calculation result is adopted as loads of the structural analysis model; 7, the structural analysis model is obtained, and the calculation result can guide the optimal design of the LNG independent C-type compartment. Oscillation load analysis of the LNG independent C-type compartment is performed through numerical calculation, oscillation loads are accurately predicted, the influence of the oscillation loads on the structural strength is analyzed, and the design method for the ship LNG independent C-type compartment is formed.

The invention discloses a folding head floor type light projecting lamp holder used for the naval architecture and ocean engineering. The folding head floor type light projecting lamp holder comprises a body. The body comprises a fixed rod. A movable casing pipe is arranged at the position, close to the top, of the outer ring of the fixed rod, and a connecting plate is arranged at the position of the top of the fixed rod. A rotating rod is arranged at the position of the top of the fixed rod, and a baffle is arranged at the position, close to the middle, of the outer ring of the rotating rod. A swing rod is arranged at the position of the top of the rotating rod, and an extending rod is arranged at the position of the right side face of the swing rod. A first swing rod is arranged at the position on the right side face of the extending rod, and an installation platform is arranged at the position of the top of the first swing rod. According to the lamp holder device, due to the connection between the operation rod and the fixed rod and the extending rod, a rotation recycling function achieved by a traditional light projecting lamp holder is achieved, in addition, the installation platform of the device can be partly bent and put down through the connecting block, and the purpose of protecting the light projecting lamp is achieved.

The invention discloses a semi-automatic rust-removal cleaning device used for naval architecture and ocean engineering, relates to the rust-removal technical field of naval architecture and ocean engineering, in particular to the semi-automatic rust-removal cleaning device used for naval architecture and ocean engineering. The semi-automatic rust-removal cleaning device comprises a rubber bottommat and a mounting plate, wherein a bottom plate is mounted above the rubber bottom mat; a fixed frame plate is mounted above the bottom plate; a through slot is formed inside the fixed frame plate; aposition regulating mechanism is arranged inside the through slot; a slide slot is formed above the position regulating mechanism; and a slide block is arranged inside the slide slot. The semi-automatic rust-removal cleaning device used for naval architecture and ocean engineering disclosed by the invention is provided with the slide slot and the slide block, the mounting plate can effectively move along the horizontal center line of the slide slot through the slide block, the T-shaped structure of the slide block can effectively limit the position of the slide block, the slide slot can effectively limit the moving track and the moving range of the slide block, and the slide block can be effectively prevented from deviating, so that the mounting plate can be stably moved.

The invention provides a portable transport trolley for ship engineering. The transport trolley includes a transverse groove and a step groove; a bracket formed by stainless steel pipes through welding; a trolley bucket is welded on the top side face of a bottom groove; a front door is arranged on the left side face of the trolley bucket and connected with the bottom side of the trolley bucket through a pin shaft; there are two side arcs of arc groove structures, and the arc groove structures are arranged on the left side face of the front door from top to bottom and correspond to a front sideplate and a rear side plate of the trolley bucket. There are two adjustment blocks which are welded to the front and rear ends on the right side face of the trolley bucket and correspond to the frontside plate and the rear side plate, and the adjustment blocks are of U-shaped structures. The trolley is simple in structure and convenient to operate, four-sided protection is provided for goods, the front door is easy to open and close, operators can operate a fixed hook and a pulling rope only at the position of a pushing handle, the safety factor of operation is high, there is no water accumulation phenomenon, and water directly flows in through the bottom groove without splashing on operators.

The invention relates to the technical field of ship engineering and discloses a dredger. When the dredger is in the working state, main trunnions are mounted on a first low-position trunnion seat anda first high-position trunnion seat correspondingly, so that the minimum and maximum excavation requirements can be met, and switching between the first low-position trunnion seat and the first high-position trunnion seat can also be carried out according to the operation condition, so that the height of the rotation point of a bridge frame is changed, and the work requirements of different digging depths can be met on the same dredger; in the non-working state such as long-time shutdown or dispatching, locking trunnions on the two sides of the front portion of the bridge frame are mounted ina second low-position trunnion seat or a second high-position trunnion seat, and the connection between the front portion of the bridge frame and a ship body is realized; due to the fact that both the main trunnions and the locking trunnions have the selection of two height positions of the low-position trunnion seat and the high-position trunnion seat, maintenance and overhaul operations of thedredger are facilitated; and meanwhile, the requirements of the heavy bridge frame can be met through mutual cooperation of the trunnions and the trunnion seats, and the adaptability of the dredger ishigh.

The invention provides a deformable front rudder trimaran, belongs to the technical field of marine engineering. The trimaran comprises a bow section, an airtight rotating body, a large section in themiddle and tail of a ship and an auxiliary small rudder, wherein the bow section, the airtight rotating body and the large section in the middle and tail of the ship are sequentially connected, the airtight rotating body rotates relatively to the bow section and the large section in the middle and tail of the ship, the auxiliary small rudder is arranged at the bottom of the bow section; the airtight rotating body comprises a shell, a power mechanism, a left deformation body and a right deformation body; the power mechanism is arranged in the shell; the left deformation body and the right deformation body have the same structure and are symmetrically arranged at the two sides of the shell; and the power mechanism drives the shell, the left deformation body and the right deformation body torotate. The trimaran has the advantages of rapidness, large cabin volume and the like of a single ship, and also has the characteristics of good stability and good wave resistance of a catamaran, sothe trimaran provides more comfortable playing experience for tourists, increases operating income and provides possibility for various exciting playing items.

The invention relates to the field of titanium alloy wires for naval architecture and ocean engineering, in particular to a special titanium alloy wire for an 800MPa-grade electron beam additive material and a preparation method of the special titanium alloy wire. The titanium alloy wire comprises, by weight, 6%-7% of aluminum, 3%-4% of niobium, 2%-3% of zirconium, 0.8%-1.5% of molybdenum, and thebalance titanium, wherein aluminum of the alloy elements is an alpha-phase stable element of the titanium alloy wire, molybdenum and niobium of the alloy elements are beta-phase stable elements of the titanium alloy wire, and zirconium of the alloy elements is a neutral element of the titanium alloy wire. The wire can meet the requirement of a manufacturing process of the electron beam additive material, and has good technical application and market prospects on the aspect of manufacturing of electron beam fuse additive materials of naval architecture and ocean engineering components.

The invention discloses a low-resistance trolley for researching the performance of a wave glider, and relates to the field of naval architecture and ocean engineering. The low-resistance trolley comprises guide rails, a trailer carrier, an aluminum plate and heaving excitation control equipment. The guide rails are arranged above the side walls of a water channel. The trailer carrier comprises atrailer frame, wheel frames and wheels. The guide rails are located below the two sides of the trailer carrier. The aluminum plate is located above the trailer carrier. The heaving excitation controlequipment comprises a servo motor, a speed reducer, a winding wheel and a servo motor controller, wherein the heaving excitation control equipment is located above the aluminum plate. By improving theprior art, on the basis of fully achieving existing functions, cooperative design of the guide rails and the water channel is adopted, the problem that the test precision of existing equipment is nothigh due to the influence of the wall faces of the water channel is greatly solved, meanwhile, cooperative design of guide rail protrusions and the wheels is adopted, the trolley is transversely positioned, the structure is simplified, and a certain effect is also achieved for reducing the operating resistance of the trolley.

The invention discloses a real ship maneuverability index identification method and device based on system identification, belongs to the field of ship engineering, navigation science and technology,and comprises a hardware system and a software system, and the identification method comprises the steps of real ship input and output data acquisition, data processing, identification starting and result output. According to the invention, data is collected in parallel; a system model formula is optimized, so that the response time is shortened, the anti-interference capability is high, and a more accurate and stable result can be obtained; due to the modular packaging design, the structure and the process are clear; the method and the device can be used for ship motion modeling and checking;conversion from theory to practical application is completed, ship motion modeling steps are simplified, efficiency is higher, data collection is more accurate and rapid, meanwhile, a large number oftedious manual operation modes and methods are reduced, labor cost and time cost are greatly reduced, the error rate is reduced, man-machine interaction can be achieved, and the method is suitable for various sea conditions, convenient to operate and high in universality.