209 results about "Waterline" patented technology

Embodiments include a buoyant wave energy converter. In an embodiment, the wave energy converter comprises an upper chamber having a first fluid reservoir and a first gas pocket, and a lower chamber having a second fluid reservoir and a second gas pocket. In an embodiment, an injection tube is between and fluidly coupled to the upper chamber and the lower chamber, where the injection tube is to impel a fluid from the second fluid reservoir into the first fluid reservoir when the upper chamber, the lower chamber and the injection tube oscillate about a waterline with the upper chamber adjacent to the waterline and the lower chamber submerged below the waterline and vertically beneath the upper chamber. An effluent tube is fluidly coupled to the upper chamber and the lower chamber, where the effluent tube is to return the fluid from the first fluid reservoir to the injection tube.

The invention relates to the technical field of ship construction, and discloses a ship annular block assembly method, which comprises the following steps of: drawing a corresponding ship body center line, a ship body longitudinal section line, a ship body rib detection line and a ship body waterline in an overall design drawing of a ship body according to the actual segmentation condition of the ship body; marking is correspondingly drawn on the built bottom section, the built broadside section and the built transverse bulkhead section in sequence as the basis; a bottom center line, a bottom rib detection line, a broadside longitudinal section line, a broadside rib detection line, a transverse bulkhead center line and a transverse bulkhead rib detection line are used for alignment and adjustment to replace data measurement of closure openings in the prior art so as to achieve alignment and butt joint of the closure openings. The problem that the alignment precision is poor due to the fact that a closing opening data measuring instrument cannot be arranged due to the narrow total assembly site is solved, the total assembly precision is guaranteed, and then the structural strength, water tightness and overall precision of a ship body are guaranteed.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by jetting a fluid onto the hull or surface continuous with hull. The fluid is jetted onto the hull or surface continuous with the hull at a location above or below the waterline of the vessel. The fluid is jetted from within a habitat positioned at least partially below the waterline, the habitat being vented to atmosphere. The habitat has an open end below the waterline. The Coanda flow extends entrains air below the waterline and adjacent to the hull. An air cavity or sheet is created by the jetted fluid. A system for reducing drag is also disclosed.

The invention provides a ship active stabilization control method and system, and relates to the field of ships. The ship active stabilization control system comprises a stabilization execution mechanism which comprises an upper platform constructed according to a ship body of a ship and a lower platform constructed according to multiple sets of water pressing plate execution mechanisms, and the multiple sets of water pressing plate execution mechanisms are arranged at any positions below waterlines of the two sides of the ship correspondingly; each water pressing plate executing mechanism comprises a water pressing plate assembly and a driving cylinder connected with the water pressing plate assembly; the data acquisition unit is configured to acquire ship body attitude and motion state information and environment data of the ship; the stabilization controller is configured to calculate and generate correction torque according to the parallel robot kinematic mechanics mechanism model, the ship posture and motion state information and the environment data, and distribute the correction torque to an execution instruction corresponding to each driving cylinder; and the driving cylinders drive the corresponding water pressing plate assemblies to execute water pressing movement or return movement according to the execution instructions.

The invention belongs to the technical field of ships, and discloses a hydroponic vegetable planting cabin for a ship and an ocean polar region ship, the hydroponic vegetable planting cabin for the ship comprises a cultivation system, a nutrient solution circulating system and an air conditioning system, the cultivation system comprises a cultivation pipeline for cultivating vegetables, the nutrient solution circulating system comprises a nutrient solution storage box, a circulating pipeline used for connecting the nutrient solution storage box with the cultivation pipeline and a pump used for driving the nutrient solution to flow, and the air conditioning system is used for controlling temperature and humidity. Vegetables are planted in a hydroponic mode, the requirement for fresh vegetables in long-period navigation is met, on one hand, the hydroponic vegetable planting cabin is arranged at the position close to the waterline of the ship body so that the hydroponic vegetable planting cabin can be kept in a stable state as much as possible, and on the other hand, the hydroponic vegetable planting cabin is arranged on the broadside of the ship body so that the waterline of the ship body can be kept stable. The porthole arranged on the broadside is used for ensuring the incidence of natural light, so that a stable and good cultivation environment with sufficient illumination is provided for the growth of vegetables.

An LED illuminated buoy system is disclosed, designed to enhance maritime safety and visibility. The system includes a weighted base with a conical shape for stability and a semi-translucent flotation part that extends above the waterline. The buoy houses an LED light source within the base, programmable for various colors and patterns. A sealing connection between the base and flotation part prevents water ingress. The system also features a communication interface for data transmission and remote operation. The buoy can be anchored securely and is adaptable for use as a lamp on land. The system's design allows for easy assembly and maintenance, with environmental resistance features integrated for durability. The buoy serves as a navigational aid, safety marker, and versatile lighting solution in aquatic environments.

The invention relates to the technical field of ship draft measurement, and provides a ship draft dynamic detection method and system based on multi-modal fusion. The method comprises the following steps: acquiring a multi-modal ship image and / or video to obtain a ship visible light image and a ship near-infrared image; performing feature level fusion on the ship visible light image and the ship near-infrared image to obtain a fused image; performing key region detection on the fused image by using a pre-trained waterline detection model adopting YOLOv11, and marking and / or cutting a key waterline region in the fused image to obtain a target image; a SegFormer network added with an NAM attention mechanism is used for carrying out ship body and water body segmentation on the target image subjected to image correction, and ship body character features and waterline pixel features are obtained through edge detection; and constructing a visual ranging model containing character coordinates based on the hull character features, and inputting the waterline pixel features into the visual ranging model to obtain a ship draft detection result.

The invention relates to a ship behavior image recognition method based on an overwater electronic bayonet, and relates to the technical field of image recognition, and the method comprises the steps: collecting a multi-angle image of a target ship through an overwater electronic bayonet snapshot system, and constructing a three-dimensional model; matching a fixed early warning water line by using a ship type database, and correcting and outputting an adaptive early warning water line in combination with the real-time navigation interference information; analyzing the ship three-dimensional model sequence of the preset time zone to obtain a real-time water level line and a driving posture; fusing the ship navigation data and the ship driving attitude to optimize the real-time water line to obtain a corrected water line; if the corrected water level exceeds the adaptive early warning water level, overload early warning is carried out. The cargo ship overload identification method solves the problems that in a traditional system, a fixed waterline is used, environmental factor changes are not considered, misinformation is likely to happen, a traditional image method is influenced by illumination, shielding and the like, waterline identification is unstable, and false detection and missing detection are likely to happen, and the accuracy and reliability of cargo ship overload identification are improved.

Embodiments include a buoyant wave energy converter. In an embodiment, the wave energy converter comprises an upper chamber having a first fluid reservoir and a first gas pocket, and a lower chamber having a second fluid reservoir and a second gas pocket. In an embodiment, an injection tube is between and fluidly coupled to the upper chamber and the lower chamber, where the injection tube is to impel a fluid from the second fluid reservoir into the first fluid reservoir when the upper chamber, the lower chamber and the injection tube oscillate about a waterline with the upper chamber adjacent to the waterline and the lower chamber submerged below the waterline and vertically beneath the upper chamber. An effluent tube is fluidly coupled to the upper chamber and the lower chamber, where the effluent tube is to return the fluid from the first fluid reservoir to the injection tube.

The present invention is a marine current turbine featuring a downstream rotor, a faired spar, a deckhouse at the waterline, and a ballasting and mooring arrangement to ensure the center of buoyancy is above the center of gravity to provide a stable platform and ample rotor torque reaction. The faired spar minimizes the wake deficit ingested by the rotor and reduces turbulence and drag on the turbine. The deckhouse provides buoyancy to react to gravitational forces and the downward tension component supplied by the mooring system during maximum platform and rotor drag conditions and reserve buoyancy if a portion of the platform becomes flooded. The mooring arrangement preferably forms a bridle to provide yaw stability.

The invention discloses a ship body ice force calculation method for ship control motion simulation in a layer ice area, and relates to the field of ship control motion simulation, and the method comprises the steps: dividing an ice raft area into a plurality of ice units, and determining the ice unit position information of each ice unit at the current moment; according to the ice unit position information and the ship body waterline position information, determining each contact ice unit in contact with the ship body waterline; determining the contact length between any contact ice unit and the ship body waterline and the ship ice contact speed by combining the ship navigation state parameters; calculating the local acting force of the contact ice unit on the ship body by using an extreme value static ice force formula in which a speed correction term is introduced; and superposing the local acting force of each ice contact unit on the ship body to obtain the ship body ice force at the current moment. According to the method, the ship body ice force can be accurately calculated when special control operations such as backing and large-drift-angle maneuvering of the ship in the layer ice area are simulated, and the accuracy and reliability of control motion simulation of the ship in the layer ice area are effectively improved.

The invention discloses a variable-structure unmanned ship and a simulation verification method, belongs to the field of water surface robots, and aims to solve the problem that an existing unmanned ship cannot realize cross-medium sailing to cope with complex sea conditions. Two foldable wings are arranged on the two sides of a main boat body respectively, each foldable wing can be turned over up and down, an underwater propeller is arranged on each foldable wing, and the underwater propellers are close to wing tips of the foldable wings and used for water surface and underwater sailing of the variable-structure unmanned boat; the air propeller is arranged at the stern of the main boat body, can turn over up and down and is used for sailing the variable-structure unmanned boat in the air or on the water surface; the number of the sliding wheels is three, and the three sliding wheels are arranged below the main boat body, can be retracted into the main boat body and are used for sliding, taking off and landing of the variable-structure unmanned boat on the land. The variable-structure unmanned ship can be transformed into a ground-effect wing ship mode, a small-waterplane-area triple-hulled ship mode or an underwater glider mode under the overturning of the foldable wings and the air propellers. The method is mainly used for task execution under complex sea conditions.

The invention belongs to the technical field of ship draft detection, and provides a ship draft real-time detection system which comprises the following steps: establishing a three-dimensional dynamic coordinate system, and updating a water surface reference surface in combination with real-time water level data; calculating water level variation of adjacent frames and compensating a point cloud Z axis; a pure ship body point cloud is separated in combination with a water surface datum plane, ship body reflectivity and a region growing algorithm; fitting a deck plane of the pure ship body point cloud, performing edge detection to extract ship board features, and correcting a side board feature surface; converting the pixel coordinates of the water surface reference surface and superposing the auxiliary lines; positioning a waterline, converting a bow / middle / tail waterline coordinate to a three-dimensional dynamic coordinate system, and calculating an initial draft; the deck Z-axis average coordinate is extracted, and the bow / middle / tail freeboard height is calculated in combination with the water surface datum plane coordinate; the theoretical draft is deduced in combination with the ship type depth, the theoretical draft is compared with the initial draft, the final draft is output, and the ship draft detection precision in the complex water level change environment is improved.

A hydrofoil arrangement for a boat includes a fastening device, first and second rigid elements, and a main hydrofoil. The fastening device is fastened on an outside of a hull below a waterline of the resting boat. The first rigid element pivots in a first pivot plane into and out of engagement with the hull, vertical and parallel to a forward direction. The second rigid element is connected to the first rigid element and extends at an angle to the first rigid element so that a second end of the second rigid element is at a vertical distance from the hull. The main hydrofoil is fastened to the second end of the second rigid element. The first rigid element can be pivoted downwards and backwards, and thereafter upwards and further backwards, to a position where its second end is arranged stern of the hull. A method is also described.

The invention relates to the technical field of offshore wind power generation, and discloses a clamped floating type offshore wind power foundation platform which comprises a floating structure and a clamped structure. The fixed supporting structure is located below the floating structure and arranged underwater in a submerged mode, and the fixed supporting structure is suitable for providing bearing capacity and anti-overturning capacity for the floating structure. The floating structure floats on the water surface so as to be suitable for installing and placing wind power equipment, and the anti-tilting capacity can be improved through the water plane and the gravity center-buoyancy center height difference. The fixed supporting structure limits the horizontal displacement of the floating structure, adjusts the overall gravity center of the offshore wind power foundation and provides the anti-overturning capacity. The clamped floating type offshore wind power foundation platform has multiple composite stability sources, on the premise that the foundation stability is guaranteed, anchor chain mooring structures are reduced, then the occupied area is reduced, the composite stability design is adopted, the situation that the structure size is too large due to a single stability source is avoided, steel materials are further reduced, the weight of the structure is reduced, and the cost is reduced. Therefore, the overall cost and the cost per kilowatt-hour are greatly reduced.

The invention relates to the field of ocean engineering equipment, and discloses a device and method for water surface close-range active auxiliary recovery of an unmanned autonomous vehicle, and the device comprises a blocking frame, a power assembly, an oscillation stopping hook module, a hoisting hook module, a suction device, a release device and a buoyancy material; the buoyancy material is fixed on the blocking frame and is used for providing static buoyancy; the power assembly is installed on the lower supporting structure of the blocking frame and located below the waterline. The power assembly is arranged below the blocking frame, so that the recovery device is endowed with independent water surface maneuvering capacity. Compared with a passive recovery mode which only depends on mother ship maneuvering or UUV autonomous homing, the device can actively approach the floating UUV by utilizing thrust and correct course deviation, and can realize axis alignment with the UUV even in a non-still water environment with stormy wave interference, so that the flexibility of recovery operation and the capture success rate are improved.

The invention relates to a ship (10) comprising a hull (110, 115) and at least one motorised propulsion means which rotates at least one propeller (180), the ship comprising at least one air duct (145, 150) comprising at least two openings including an air intake opening (140) positioned above the waterline (190) of the ship and an air outlet opening (160, 161) positioned below the waterline of the ship and configured to direct the air flow under the hull so as to reduce the friction of the hull on the water during navigation, the respective positions of each air outlet and of each propeller on the hull being selected so that the air flow(s) directed under the hull of the ship are axially offset with respect to each propeller so as not to hinder the operation of the propellers.

The invention discloses a ship auxiliary propulsion device which comprises an isolation body, the isolation body is fixed to the position, in front of a wind resistance generating object, of a ship in use, and the wind resistance generating object comprises a ship body located above a waterline, a superstructure located above a deck and cargoes on the deck. When the ship advances, the isolation body is used for isolating at least part of airflow blowing to the object generating wind resistance, the isolation body is provided with a windward side directly facing the airflow, the windward side is in an uphill gradient mode in the direction from front to back, and a wing-shaped body arranged in an overhead mode is fixed to the position corresponding to the upper portion of the windward side. The device is easy to install, free of movable operation parts, capable of reducing wind resistance of the ship and generating horizontal component force for pushing the ship to advance, especially suitable for the container ship, and the whole device can better reduce oil consumption, reduce emission, achieve energy conservation and emission reduction and assist in achieving green shipping.

Novel ships A, B, C1 and C2 are provided. A, propeller propelling systems 3, 4 and 5 are arranged below waterlines on the two sides of a prow; b, arranging ice surface sliding plates on two sides of the ship body, and arranging a high-power electric fan above the waterline of the stern; c1, front, middle and rear sliding plates are arranged on the two sides of the ship body, and a plurality of sets of 50-meter trailer locking sliding plates are arranged on the high-speed rail. And C2, front, middle and rear sections of sliding plates are arranged on two sides of the ship body, a plurality of groups of electric high-speed rail wheels are arranged below the sliding plates, and the track gauge of each group of electric high-speed rail is 1.435 m. The method is comprehensively discussed in the specification of the specific development implementation scheme in the theoretical and technical fields.

The application discloses a kind of static water pressure loading methods of automobile roll-on / roll-off ship under broken compartment condition, at least including as follows: broken compartment water line is expressed using function segmentation under broken compartment condition at a transverse section;Broken compartment water line is cut into several segments in longitudinal direction under broken compartment condition;The method of finite element is segmented to apply static water pressure under broken compartment condition.The main problem of simulating the correct broken compartment water line under broken compartment condition is solved, so as to accurately check the structural strength of watertight deck;The operation of conventional application method is conservative, which causes the broken compartment pressure to be greater than the actual value, resulting in the unreasonable increase of structure, and the broken compartment water line simulation is accurate in the application, and the structure arrangement is reasonable.

The application discloses a bidirectional ice-breaking transport ship with open water performance, wherein the lower bow part of the bow of the ship is a small ball bow, the lower ice belt waterline is located on the upper half of the small ball bow, the outer surfaces of the upper bow part, the middle bow part and the lower bow part are streamlined, an ice discharge groove is arranged below the stern plate of the stern of the ship, the ice discharge groove is divided into two symmetrical halves by the centerline of the ship, the intersection line of the ice discharge groove and the ice-breaking stern is the stern post, the included angle between the stern post and the centerline of the ship is not greater than 30 DEG, a pod platform is arranged at the position close to the keel of the stern post, a triangular transition plate is arranged at the position close to the stern of the ship, the transition plate connects the end of the ice discharge groove and the ice-breaking stern with the stern plate, the distance between the two stern posts on the two sides of the ice discharge groove gradually increases from the stern of the ship to the keel direction, and the end of the stern post close to the transition plate is higher than the other end. The structure of the bidirectional ice-breaking transport ship has the open water performance under ballast water and the bow ice-breaking performance under the lower ice belt waterline, the bow of the ship has the ability of breaking thin ice, the stern of the ship has the ability of breaking medium heavy ice, and the bidirectional ice-breaking transport ship has important significance.

The invention provides a grid algorithm-based ship berthing wind action measuring and calculating method, which comprises the following steps of: establishing a ship contour line function and a waterplane equation, and determining a waterplane segmentation position in real time; a grid algorithm is applied to calculate the ship waterline upper contour wind area, and the ship centroid coordinate and centroid height are determined; and converting the wind speed data into the wind force of the windward action point corresponding to the centroid height by adopting a conversion model. According to the method, the centroid height and the centroid coordinate are calculated firstly, and then the predicted wind or the actually measured wind is converted to the wind speed at the centroid height of the wind area of the ship, so that the wind power and the wind level borne by the ship are judged, and the error of the influence of an anemograph or weather forecast on the actual wind power of the ship is reduced; and taking corresponding measures based on the conversion and analysis results, so as to ensure that the operation ship can timely and accurately make corresponding adjustment in a complex sea condition environment, and ensure that the ship can safely and efficiently carry out related operation.

The invention belongs to the technical field of vibration reduction, and particularly relates to a marine expansion type watertight vibration reduction assembly and application of the marine expansion type watertight vibration reduction assembly to underwater propulsion equipment. The expansion type watertight vibration reduction assembly for the ship comprises a mounting base, an elastic piece, a fixing piece and a supporting piece. The elastic piece is connected with the fixing piece; one end of the mounting base is connected with the elastic piece, and the other end of the mounting base is used for being connected with a steering oar; the fixing piece comprises a base trunk and a gland flange. The marine expansion type watertight vibration reduction assembly has excellent sealing and vibration reduction effects, the structure of the marine expansion type watertight vibration reduction assembly is simple, the construction difficulty and the workload during installation can be greatly reduced, meanwhile, the size of the marine expansion type watertight vibration reduction assembly can adapt to different forms of steering oar propellers to be adjusted, and the application range of the marine expansion type watertight vibration reduction assembly is wide. And the method has relatively high flexibility and adaptability.

The invention belongs to the technical field of ships, and discloses a ship water gauge mounting method which comprises the following steps: S1, sequentially placing a plurality of water gauge segments on a plurality of pier bases; s2, pre-confirming the positions of a height mounting line and a rib position line and the plate thickness of a bottom plate outside a mounting rib position; s3, a waterline and a rib detection line are determined and marked, a first sample punching point is determined on the waterline, and a second sample punching point is determined on the rib detection line; s4, scribing the height mounting line and the rib position line in the step S2 by using a total station according to the step S3; and S5, confirming an upper mounting line and a lower mounting line of each water gauge character, and performing spot welding and full welding on the water gauge character. According to the ship water gauge character mounting method, the water gauge character can be mounted when the ship is transferred to an external field in a segmented, tire-free and placed mode, the water gauge character is mounted through the total station, the height mounting line, the rib position line, the water line, the rib detection line, the mounting line and the like, and the mounting precision is improved; therefore, the general assembly stage in the prior art is improved to the segmentation stage for installation of the water gauge character.

The application discloses a kind of non-perfect information condition under ship basic structure shape three-dimensional modeling method, including obtaining the three-dimensional modeling main scale basic data of ship platform;Establish the three-dimensional modeling coordinate system of ship basic structure shape, with ship overhead satellite remote sensing image as reference, construct initial main deck boundary line and superstructure contour model, with the deflection angle adjustment correction of initial model, with the deflection angle of correction as the shooting visual angle of satellite remote sensing image, restore to construct the two-dimensional normal overhead view of main deck boundary line and superstructure contour;Construct the control point coordinate of main deck boundary line, superstructure contour in the positive direction of Z axis, as the contour control point height above waterline, restore to construct the two-dimensional normal side view of ship basic structure shape;According to ship multi-view photograph, ship basic structure three-dimensional fitting is carried out, and ship platform basic structure three-dimensional shape modeling is completed.The application can realize the three-dimensional modeling of ship geometric shape under non-perfect information condition.

The invention relates to the technical field of ocean energy development and utilization, in particular to a power generation buoy capable of converting wave energy through cross-medium coupling, which comprises an annular floating body, an air turbine, a water turbine, a connecting pipe, a power generation module and a mooring system, the water turbine is fixedly installed in water below the annular floating body, the air turbine is connected with the water turbine through the connecting pipe, the air turbine is connected with the power generation module, the power generation module is fixed above the annular floating body, and the mooring system is moored below the waterline of the annular floating body. The outer rotor, the stator and the inner rotor in the power generation module are coaxially arranged, when the outer rotor and the inner rotor relatively rotate, an inner magnetic field and an outer magnetic field are electromagnetically coupled, and cross-medium coupling conversion wave energy power generation of the device is achieved; the air turbine and the water turbine are connected through the connecting pipe, a pipe shaft of the air turbine and an output shaft of the water turbine transmit energy to the power generation module, power aggregation is achieved, and the power generation efficiency is improved.

This invention discloses a monitoring method for a box-shaped keel on an ice-covered vessel, comprising the following steps: marking three spaced monitoring positions on the box-shaped keel, one of which is located at the heavy-load waterline at the bow; installing at least one monitoring component at each of the three monitoring positions; using a vibration sensor on the monitoring component to detect the vibration amplitude of the box-shaped keel and transmitting the detected vibration amplitude to a processor; and using a temperature sensor to detect the temperature of the box-shaped keel and transmitting the detected temperature to the processor; when the vibration amplitude detected by any vibration sensor exceeds a set amplitude, or when the temperature detected by any temperature sensor continuously rises to a set temperature within a set time period; reducing the vessel's speed from the current speed to a safe speed; and / or changing the vessel's course from the current course to a safe course. This method protects the scientific research equipment inside the box-shaped keel by monitoring its vibration amplitude and temperature changes.

The present invention relates to a combined control method for the bow and stern stabilizing fins of a small waterplane area catamaran (SWATH) vessel, comprising a SWATH vessel having symmetrically arranged bow fins mounted on the inner side of the bow portion and symmetrically arranged skeg fins mounted on the inner side of the stern portion. The SWATH vessel is equipped with a control system, an environmental perception sensor, and a hull attitude sensor. The combined control method for the bow and stern stabilizing fins comprises eight operating steps. By obtaining an engineering empirical formula relating hull resistance to the bow fin attack angle and the skeg fin attack angle, as well as the longitudinal stability equation of the SWATH vessel, the bow and stern fin adjustment angle values ​​are determined when the hull resistance is minimized, providing theoretical guidance for the stable navigation control of the SWATH vessel. By combined control of the bow and stern fins, the longitudinal stability requirements of the vessel can be met while ensuring the lowest hull resistance.

The invention provides a device for offshore oil jacket large steel pile waterline marking construction, and relates to the technical field of offshore oil engineering equipment.The device comprises a frame and a sample plate lifting device arranged at the upper end of the frame, a construction platform is arranged on the side portion of the frame, and a climbing ladder is connected to the bottom of the construction platform; the frame comprises two cross beams symmetrically arranged at the bottom, stand columns are symmetrically arranged at the two ends of the cross beams, supporting pieces are arranged at the tops of the stand columns, a sample plate lifting device is arranged on the supporting pieces, and a walking steering mechanism is further arranged at the bottom of the frame. The walking steering mechanism is controlled by the control assembly to drive the frame to move, the sample plate can rotate along with a winding drum of the winding device through the sample plate lifting device to achieve lifting motion, the problem of waterline marking construction of the large steel pile of the offshore oil jacket is effectively solved, and the efficiency and precision of waterline marking construction are remarkably improved.

The application discloses a ship body and a deep V-shaped corner semi-small water plane catamaran, and belongs to the technical field of ships. The ship body comprises a first diving body, a second diving body, a first anti-rolling bilge keel, a second anti-rolling bilge keel, a first deadwood structure, a second deadwood structure and a V-shaped structure, the bottom longitudinal section shape of the first diving body and the second diving body is a V-shaped structure. The two included angle sides of the V-shaped structure are flat plate lines, the wave making resistance is small, and the ship body is beneficial to rapid navigation; the comprehensive reaction force of the first anti-rolling bilge keel and the second anti-rolling bilge keel will force the ship body to be righted and stand upright, the wind and wave resistance of the ship body is enhanced, and the sea keeping quality, the seaworthiness and the riding comfort of the ship are improved; a propeller tunnel is formed between the bottom of the stern of the ship body and the tail of the deadwood structure, the ship body has the soft beach landing ability during the ebb tide, and the propeller and the rudder blade are protected.