35 results about "Ship waves" patented technology

The invention discloses an intelligent early-warning and wave-absorbing system and method for navigation tunnel ship traveling waves, and belongs to the field of navigation tunnel wave absorbing.The intelligent early-warning and wave-absorbing method for navigation tunnel ship traveling waves comprises the steps that when a ship arrives at an entrance of a navigation tunnel, a lifting rotating assembly controls a wave-absorbing plate to rotate till the included angle between the wave-absorbing plate and the inner wall of the navigation tunnel is a preset angle; when a ship drives into the navigation tunnel, the wave height measuring assembly monitors the water level change in the navigation tunnel and the ship traveling wave height in real time and transmits monitoring data to the control terminal for processing, the control terminal judges the monitoring data and controls the early warning assembly to send out early warning information, and the lifting rotating assembly controls the wave absorbing plate to ascend and descend to absorb waves. And after the ship is driven out of the navigation tunnel, wave height monitoring is stopped, and the lifting rotating assembly drives the wave absorbing plate to ascend and descend to the initial position. According to the embodiment of the invention, the angle and height of the wave absorbing plate can be dynamically adjusted to adapt to complex wave changes in a tunnel, meanwhile, an early warning signal is sent out, and the navigation safety and efficiency of a ship are improved.

The invention discloses a ship control method and device in an inland river scene, electronic equipment and a storage medium, and can be applied to the technical field of intelligent navigation of ships. According to the method, the ship traveling wave energy distribution rule is calculated according to the first state information and the second state information which are acquired in real time, then the first following distance is determined, and then path planning is performed by combining the ship energy consumption, the ship traveling wave energy distribution rule, the safety margin and the total navigation time which are acquired in real time to obtain the first navigation path of the target ship; a first sailing control instruction of the target ship is predicted by adopting a nonlinear model control method so as to control the sailing process of the target ship in the inland river scene, and meanwhile, the sailing process of the target ship in the inland river scene is controlled by a second sailing control instruction generated by dynamically adjusting the first sailing path according to the channel environment change information. Therefore, the balance between the energy efficiency and the sailing efficiency can be realized in the whole sailing process of the target ship, and emergencies in the sailing process can be effectively coped with.

The invention relates to the technical field of ship sea wave compensation, in particular to a closed-loop feedback control method and system for a ship wave compensation medical care platform, and the method comprises the following steps: obtaining a posture signal of a lower platform of the wave compensation medical care platform, constructing a data set, and constructing a posture prediction model of the lower platform; the processor is used for acquiring attitude predicted values at future moments; based on the data set and the lower platform pose prediction model, constructing a residual prediction model to obtain a residual prediction value of pose prediction; and constructing a kinematics model of the lower platform, determining an accurate attitude value through an attitude correction algorithm in combination with an attitude predicted value and a residual predicted value, solving a rotation angle of a servo motor by using a motion inverse solution algorithm, and further realizing closed-loop feedback control of the wave compensation medical care platform. The wave compensation medical care platform can be accurately controlled in a complex environment, the wave compensation effect on the wave compensation medical care platform is improved, and then the risk of offshore medical treatment is reduced.

The present application relates to a kind of photovoltaic power generation integrated ship wave shield, regular rectangular deck opening is opened on top plate, and longitudinal and transverse beams are formed between each deck opening;Each deck opening is provided with a photovoltaic panel or transparent glass corresponding to each deck opening;The lower part of adjacent longitudinal is fixedly provided with multiple pairs of truss diagonal bracing, and the bottom end of each pair of truss diagonal bracing is connected to form a connection node, and multiple connection nodes are fixedly connected with truss horizontal bracing along the direction of beam, to form a group of truss diagonal bracing unit;Truss horizontal bracing is fixedly connected with lower wall at both ends;No column is arranged in the space below top plate.The present application can provide sufficient structural support for wave shield without setting support, while reducing the influence on deck equipment, without affecting the passage and operation of personnel.Integrated solar photovoltaic panel is installed on the top of closed wave shield, which can prevent sea waves from entering the ship body, fully utilize the space above wave shield, and use solar power generation to provide additional clean energy for ship.

The present invention discloses a ship comprehensive information database management system and method based on big data analysis. The system includes: a marine environment perception and ship status monitoring module for real-time collection of marine environmental data and ship operating status data; a ship wave impact characteristic modeling module for constructing a ship wave impact characteristic model; a ship navigation optimization target setting module for modeling the ship navigation fuel consumption and energy conservation problem as a nonlinear constrained optimization problem; a variant mayfly optimization global path search module for determining a preliminary set of candidate ship optimal navigation paths within a dynamic search space; a water drop algorithm local path optimization module for obtaining locally optimal navigation paths; and a ship global path optimization and navigation control module for generating corresponding ship navigation control parameters. By combining the ship comprehensive information database, the present invention can predict the optimal energy consumption area under different sea conditions and fine-tune the path based on the ship's real-time position and marine environmental parameters.

The present invention discloses a method for determining the equivalent design wave of a ship's wave load under level 6 sea conditions, relating to the field of ship structural safety. The method comprises: treating the hull as a variable-section beam, and for a ship at a constant speed, calculating the wave load transfer function at the hull beam section under different wave conditions, wherein the wave conditions include different wave direction angles and different circular frequencies of the incident wave; based on the wave load transfer function at the hull beam section, calculating the short-term predicted extreme values ​​of the wave load under different wave direction angles and different zero-crossing periods within the significant wave height range of level 6 sea conditions; selecting a maximum value from all the short-term predicted extreme values ​​of the wave load, and determining the equivalent design wave parameters of the wave load under level 6 sea conditions based on the maximum value. The equivalent design wave is a sinusoidal regular wave, and its parameters include wave amplitude, circular frequency, and wave direction. By converting the study of the load on the hull under random waves into the study of the hull load under regular waves, this method is of great significance for subsequent research on hull load levels and structural safety.

The invention relates to an operation and maintenance ship wave compensation trestle simulation wind field lap joint test method. The lap joint test method comprises the following steps that a boarding ladder is selected to replace a wind field platform for lap joint of the wave compensation trestle; carrying out safety check and pre-debugging before the test; pulling the operation and maintenance ship to a test area, and positioning the ship at a position 10-25 meters away from the simulated wind pile; the trestle is lifted and rotated, the trestle swings to the direction perpendicular to the ship body, and lap joint is prepared; stretching out the trestle until the end part of the trestle is in contact with the boarding ladder, and automatically switching to a lapping state when the trestle is completely lapped; the lap joint condition is checked; and the mother ship is moved towards the bow, the stern, the left chord and the right chord, and the trestle is kept in lap joint with the boarding ladder. The method has the advantages that the trestle lap joint test is carried out at a company wharf, the boarding ladder tool is used for replacing a wind field platform, the operation and maintenance ship trestle lap joint test time and cost are shortened, the lap joint test cost is reduced, and it is guaranteed that follow-up projects can be smoothly delivered by optimizing the trestle lap joint test process.

The invention provides a polar forecastle ship wave-resisting and anti-freezing ventilation system which comprises an air inlet structure air duct and an air exhaust structure air duct, the air inlet end of the air inlet structure air duct is arranged on the side wall of one broadside of a ship, and the air outlet end of the air exhaust structure air duct is arranged on the side wall of the other broadside of the ship. A plurality of air inlet pipes are connected to the lower portion of the air inlet structure air channel, an air inlet fan is arranged on each air inlet pipe, a plurality of air exhaust pipes are connected to the lower portion of the air exhaust structure air channel, and an air exhaust fan is arranged on each air exhaust pipe. The sides, close to the broadside, of the air inlet structure air channel and the air outlet structure air channel are provided with wave-resisting and anti-freezing assemblies, and the air inlet air pipe and the air outlet air pipe are both located on the sides, away from the broadside, of the wave-resisting and anti-freezing assemblies. The wave-resisting and anti-freezing ventilation system for the polar forecastle ship can meet the sailing requirement in the polar region and under the extremely heavy storm sea condition, the wave-resisting and anti-freezing effects of the ventilation system on an external ventilation opening are remarkable, and the energy-saving design specific to the system is achieved.

The invention relates to a longitudinal heterogeneous ship formation-based drag reduction prediction model design method and a related device, and belongs to the technical field of ship engineering and fluid mechanics, and the method comprises the steps: setting longitudinal heterogeneous ship formation numerical simulation parameters in preset simulation software; designing numerical simulation scenes of different formation configurations by adopting a control variable method, determining ship resistance coefficients of longitudinal heterogeneous ship formations under each formation configuration, and analyzing action rules of bow flow field velocity and ship traveling waves on shear resistance and differential pressure resistance; based on the action rule, a mixed graph neural network prediction model is adopted to predict formation resistance of a to-be-formed ship group, and the mixed graph neural network prediction model comprises a collaborative architecture coded through a GATv2 dynamic attention mechanism and GINE geometric features. According to the method, the resistance reduction effect of the longitudinal heterogeneous ship formation can be predicted and optimized, and a scientific basis and an intelligent decision tool are provided for ship formation configuration.

This invention relates to an experimental apparatus and method for simulating ship motion under severe sea conditions, belonging to the field of ship wave load testing technology. It addresses the problem that existing severe sea condition wave load testing technologies are insufficient in simulating realistic waves under actual sea conditions, such as high wave heights, distorted waves, and breaking waves. The wave-generating system includes a wave-generating plate located at one end of a water tank and swinging along the length of the tank, and a driving component for driving the wave-generating plate's swing. The nonlinear wave generation system includes a wave-generating rod and several jet pipes. The wave-generating rod is arranged along the width of the water tank and slidably set along the height of the water tank via a height adjustment component. The jet pipes are all located at the bottom of the water tank. This invention enables the simulation of the water-air mixture flow field and accurate measurement of loads in distorted and nonlinear waves under severe sea conditions. It allows for a wide variety of experimental types and diverse functions, and can replace the expensive and costly towing tanks used for general ship models.

The embodiment of the application provides a shaft power generation fuel saving system in a ship power positioning mode, which is applied to the technical field of ship propulsion and control, and comprises: a data acquisition module, which acquires ship wave motion sensing data and generates a three-dimensional wave ship body atlas; a thrust loss prediction module, which predicts the instantaneous immersion depth of a propeller according to the atlas and calculates the instantaneous thrust loss amount in a future time window through a deep learning model; a coordinated control and execution module, which controls the dynamic switching of the shaft power generator between the power generation mode and the electric mode according to the comparison result of the thrust loss amount and a threshold value and sends an unloading signal before switching to the electric mode; and a power grid load management unit, which receives the unloading signal and short-term removes an interruptible load. The application realizes active prediction and dynamic compensation of thrust loss under wave disturbance, stabilizes the main engine speed, recovers energy, guarantees the stability of the power grid through load collaborative management, and improves the safety and economy of ship power positioning operation.

The application discloses a ship wave energy dissipation and wave dissipation arc plate floating structure design method and a period unit structure, belongs to the technical field of floating breakwater, and collects hydrological condition and ship running characteristic data of a water area to be sheltered, including navigation water level h, speed, ship wave height H, wavelength L and ship wave direction, constructs a period unit structure with triple wave dissipation and energy dissipation modules, connects multiple period unit structures to form an arc plate floating structure with a rhythm structure, makes waves have a phase difference in a propagation process, changes a wave propagation path by using wave interference, and dissipates wave energy. The arc plate floating structure has good wave dissipation and energy dissipation effects, the modular design of the period unit structure provides high flexibility, construction convenience and scalability, and the structure layout can be quickly adjusted according to actual needs. The arc plates are sequentially connected to form a rhythm structure, the structure is simple, and the appearance is beautiful. The use of the hollow plates can also reduce material consumption and cost.

The application discloses a wave load calculation network training method and a ship wave load calculation method. The method comprises the following steps: obtaining fluid simulation data formed after simulation of a ship in a pre-set water flow environment in computational fluid dynamics; loading a wave load calculation network; dividing the wave load calculation network into an encoder, a connector and a decoder; calling the encoder to calculate initial wave load of the ship in the water flow environment according to a multi-head self-attention mechanism and a multi-layer perception method under one-dimensional angle of the fluid simulation data; calling the connector to determine resolution features associated with the initial wave load; calling a decoding layer to calculate target wave load of the ship in the water flow environment according to the initial wave load and the resolution features; and using the multi-head self-attention mechanism and the multi-layer perception to enable the wave load calculation network to learn complex and implicit features of the fluid simulation data when calculating the wave load of the ship, thereby improving the stability of the wave load calculated by the wave load calculation network.

The invention discloses a method and a device for creating a viscous spawning site of fishes in a canal, computer equipment and a readable storage medium. The method comprises the following steps: acquiring key habitat parameters of a historical viscous spawning site of target fishes; dividing a to-be-built area into space units, and simulating habitat conditions of each unit by using a numerical model; based on the historical spawning data and the simulated habitat, identifying main environment driving factors influencing spawning; obtaining a suitability curve of each factor through a tolerance test; determining an influence distance by combining ship traveling waves; and constructing a spawning site suitability model, screening a potential building area, and determining an engineering scheme. According to the method, through multi-scale habitat simulation and driving factor coupling, precise site selection and bionic engineering design of a spawning site are achieved, scientific support is provided for canal fish breeding habitat restoration, and the breeding success rate of viscous egg fishes is increased.

The application discloses a high-speed ship wave-resisting stabilizing hydrodynamic force self-adaptive control method and an implementation device, and belongs to the field of high-speed ship wave-resisting stabilizing hydrodynamic force self-adaptive control. The application comprises a stabilizing device, a power driving device, a real-time monitoring module and a hydrodynamic force optimization control module. The stabilizing module comprises a vector water jet propeller for active stabilizing and an appendage for passive stabilizing. The vector water jet propeller is installed at the stern of the ship, can be actively adjusted in multi-angle rotation to form a control surface. The appendage is installed on both sides of the ship body and connected with the ship body through two mutually parallel electric connecting rods. The bottom of the electric connecting rod is connected with the ship body through a multi-angle rotating base. The crank is electrically driven by the hydrodynamic force optimization control module and moves in different directions to drive the connecting rod and the appendage to move horizontally and longitudinally. The sensor and the gyroscope installed on the ship body can obtain the ship body posture, the appendage position and the sea state information in real time. The monitoring data is brought into the hydrodynamic force optimization control system to obtain the optimal solution of the appendage position, and the high-speed ship wave-resisting stabilizing hydrodynamic force self-adaptive control is realized according to the optimal solution of the appendage position.

The invention discloses a method and a system for calculating the maximum wave height of ship traveling waves at the closed end of a ship lift chamber with a middle channel. The method comprises the following steps: determining a navigation path of a ship driving out of a first-stage ship lift chamber and driving into a second-stage ship chamber through the middle channel; acquiring ship parameters and an intermediate channel scale; the maximum navigational speed V of the ship in the channel is determined, and the Froude number is calculated; and substituting the parameters into a dimensionless regression model, and directly calculating the maximum wave height of the closed end of the ship chamber. According to the method, the influence of closed end reflection, fluctuation superposition, channel section coefficient and ship scale coupling is comprehensively considered for the first time, the defects that an existing empirical formula is only suitable for an open water area and neglects the closed boundary effect are overcome, the prediction precision of the maximum wave height of the ship traveling wave of the middle channel of the combined ship lift is remarkably improved, and the prediction accuracy is improved. And a reliable basis is provided for safe operation and channel optimization design of the multi-stage ship lift.

The present invention discloses an ecological waterway revetment and wave-breaking device and its assembly method, belonging to the technical field of inland river slope protection engineering. The device comprises a support mechanism and a grating mechanism, the support mechanism comprising upright posts, a center beam, a top beam, and a bottom plate. One end of the upright post is embedded in a cup-shaped foundation on the bottom plate, and the other end is provided with a first mortise and tenon groove. The two ends of the center beam are placed on the corbels of the upright posts, forming a water-permeable hole with the bottom plate. The first tenons at the two ends of the top beam extend into the first mortise and tenon grooves, connecting to the upright posts. Adjacent bottom plates are connected to each other via second tenons and second mortise and tenon grooves. The grating mechanism comprises grating bars arranged parallel to each other between the center beam and the top beam. One end of the grating bar extends into a groove provided in the center beam, and the other end is connected to the top beam via a detachable assembly. The device can achieve water circulation between the riverside and the landside while reducing the energy of ship waves.

The invention discloses an unmanned ship wave energy collecting device based on a nonlinear inerter and an X structure. The unmanned ship wave energy collecting device comprises a ship body, an X-structure energy collector and a vibration platform, and the ship body plays a supporting role; the vibration platform is arranged on the ship body through the X-structure energy collector; when the ship body encounters waves in water, the ship body and the vibration platform generate relative displacement through the X-structure energy collector, and energy collection is achieved. The design that the X structure and the nonlinear inerter are combined is adopted, the characteristics of the nonlinear inerter are utilized, the ultra-high system equivalent mass can be achieved only through the extremely small additional mass, low dynamic and high static can be achieved under the ultra-low system frequency, in other words, ultra-low frequency wave energy collection is achieved through low dynamic rigidity, and the high bearing capacity is achieved through high static rigidity. In addition, due to the design of the X structure, the device is more compact, a certain damping effect can be achieved through cooperation of the X structure and the springs, and the stability of the unmanned ship under different weather conditions is improved.

The invention discloses a navigation ship motion parameter extraction method based on wave height time sequence data. Two measuring points are arranged on the same side of a ship navigation main channel by adopting a wave height sensor; the method comprises the following steps: acquiring ship traveling wave time-wave height data in a channel by using double measuring points, and constructing a basic signal set; performing frequency spectrum domain conversion and purification processing on the basic signal set by combining short-time Fourier transform with noise threshold filtering to obtain an effective wave system frequency spectrum matrix; angular frequencies of two measuring points are extracted by adopting a dynamic window peak value detection method in combination with linear fitting aiming at transverse waves, and slopes of the two measuring points are extracted by frequency spectrum matrix binaryzation and improved Hough transform aiming at scattered waves; the ship navigational speed is inverted based on the angular frequency, the vertical distance between the ship and the measuring point is deduced in combination with the scattered wave slope, the navigational direction angle is deduced according to double-measuring-point geometric analysis, the navigational speed, the ship position and the course angle parameters are output, and navigational ship dynamic monitoring without active signal dependence is achieved. According to the invention, high-precision and high-reliability ship dynamic monitoring in a complex scene is realized.

This utility model discloses a wave energy dissipation device suitable for ecological waterways, specifically relating to the technical field of wave dissipation equipment for waterways. It includes a stress-relief component installed on the front side of a fixed plate for wave energy elimination. The stress-relief component includes a support plate installed on the front side of the fixed plate via a support member, and a movable plate is provided on the rear side of the support plate. This utility model designs the movable plate and support plate as arc-shaped, allowing the arc surface to convert the kinetic energy of the water flow into potential energy in the vertical direction. By changing the direction of the water flow, a reverse flow is formed, thereby reducing the positive impact force of the waves. The movable plate dissipates wave energy through the elastic deformation of a spring. Energy dissipation is achieved through dynamic displacement. Simultaneously, the rearward movement of the movable plate creates a gap between it and the support plate, forming a narrow channel. This allows the water flow to reflect multiple times within the gap, consuming energy. Thus, a three-stage energy dissipation mechanism forms an energy attenuation chain, improving the energy dissipation of ship waves.

The utility model discloses a portable ship anti-wave anti-collision device for ocean engineering, which comprises a ship body, a first fixing frame is movably connected to the outer side of the ship body, one end of the first fixing frame and one end of the ship body are both V-shaped, a plurality of dampers are fixedly connected to the outer side of the first fixing frame respectively, and one end of each damper is provided with a through hole. One ends of the dampers are connected with a first fixing plate and a second fixing plate correspondingly, a plurality of connecting rods are arranged on one side of the first fixing plate and one side of the second fixing plate correspondingly, the first air bag and the second air bag are inflated through the first air pipe and the second air pipe, and a certain elastic space is increased by the first air bag and the second air bag; the portable ship anti-wave anti-collision device for ocean engineering solves the problems that according to an existing portable ship anti-wave anti-collision device for ocean engineering, a plurality of tires are installed on the outer side of a ship to achieve the anti-collision function, but a round gap is reserved in the center of each tire, so that the anti-collision effect is poor, and hard objects easily pass through round holes in the centers of the tires to damage the ship.

The embodiment of the application provides a shaft power generation fuel saving system in a ship power positioning mode, which is applied to the technical field of ship propulsion and control, and comprises: a data acquisition module, which acquires ship wave motion sensing data and generates a three-dimensional wave ship body atlas; a thrust loss prediction module, which predicts the instantaneous immersion depth of a propeller according to the atlas and calculates the instantaneous thrust loss amount in a future time window through a deep learning model; a coordinated control and execution module, which controls the dynamic switching of the shaft power generator between the power generation mode and the electric mode according to the comparison result of the thrust loss amount and a threshold value and sends an unloading signal before switching to the electric mode; and a power grid load management unit, which receives the unloading signal and short-term removes an interruptible load. The application realizes active prediction and dynamic compensation of thrust loss under wave disturbance, stabilizes the main engine speed, recovers energy, guarantees the stability of the power grid through load collaborative management, and improves the safety and economy of ship power positioning operation.

This invention relates to the field of waterway engineering technology, specifically to a three-dimensional grid-type revetment structure that actively creates habitats for benthic animals. While meeting the requirements of engineering revetment, it utilizes the energy dissipation of the outer grid surface of the first type of component, and the combination of the internal sheltered cavity, sidewall openings, guide plates, and openings in the second type of component. This allows the reciprocating exchange water flow caused by ship waves to be guided, buffered, and distributed after entering the internal sheltered cavity. This weakens the direct disturbance of the internal sheltered cavity by local accelerated flow, vortices, and turbulence near the openings and grids, providing a relatively stable space for benthic animals to enter, inhabit, and hide. The spatial organization through the openings in the four sides of the block connecting to the internal sheltered cavity provides channels for benthic animals and small aquatic organisms to enter, leave, and utilize the space, while reducing the local flow velocity peaks and turbulence intensity near the openings, thus improving the accessibility and usability of underwater microhabitats.

The invention discloses a water wave surface measurement software and hardware system based on multi-line structured light and a monocular camera, and belongs to the technical field of ship wave surface measurement. The method comprises the following steps: building and calibrating a system, arranging a multi-line laser and a monocular camera to form a hardware system, using a checkerboard marker to fix camera parameters and fitting a laser plane equation; water wave image acquisition: acquiring laser stripe images reflected by water waves; preprocessing the image, and enhancing and denoising the image; stripe center extraction and sorting: extracting stripe center coordinates with sub-pixel precision and carrying out clustering sorting to correspond to a laser plane; and three-dimensional wave surface reconstruction: converting the coordinates into three-dimensional points and carrying out interpolation to obtain wave surface morphology data. According to the method, the multi-line structured light is combined with the monocular vision, so that the interference of the broken wave surface is overcome, the problem of feature matching is avoided, and the high-precision and high-robustness measurement of the high-dynamic water wave transient full-field three-dimensional morphology is realized.

The application relates to a drag reduction prediction model design method based on a longitudinal heterogeneous ship formation and a related device, and belongs to the technical fields of ship engineering and fluid mechanics. The method comprises the following steps: setting longitudinal heterogeneous ship formation numerical simulation parameters in a preset simulation software; adopting a control variable method to design numerical simulation scenes of different formation configurations, determining ship drag coefficients of the longitudinal heterogeneous ship formation under each formation configuration, and analyzing the action law of ship bow flow field velocity and ship wave on shear resistance and differential pressure resistance; and based on the action law, a mixed graph neural network prediction model is used to predict the formation drag of a to-be-formed ship group, wherein the mixed graph neural network prediction model comprises a cooperative architecture encoded by a GATv2 dynamic attention mechanism and a GINE geometric feature. The application can predict and optimize the drag reduction effect of the longitudinal heterogeneous ship formation, and provides a scientific basis and an intelligent decision-making tool for ship formation configuration.

The utility model provides a bank protection structure with a wave dissipation function. The revetment structure with the wave dissipation function comprises a bottom plate; the wall body assembly is arranged on the bottom plate, the wall body assembly is used for separating the embankment and the river channel, and an opening is formed in the side, facing the river channel, of the wall body assembly; the wave dissipation assembly is arranged at the opening, a containing cavity is formed between the wave dissipation assembly and the wall assembly, the containing cavity is used for containing soil and stone materials, a wave dissipation space is formed in the top of the wave dissipation assembly, and an open hole is formed in the side, away from the wall assembly, of the wave dissipation assembly and used for communicating the wave dissipation space with the river channel; and the wave dissipation stone is accommodated in the wave dissipation space. The utility model solves the problem that the service life and the stability of a revetment in the prior art are reduced because the revetment is eroded by ship waves after being used for a long time.

The application discloses a kind of for clinker crane ship wave load direct prediction method, it includes the following steps: establishing hydrodynamic grid model, establishing mass model with the weight distribution of whole ship, by analysis calculation, under regular wave, the velocity potential is obtained;The virtual mass inertia moment of the weight on the clinker crane is obtained by using the offset mass method;Rewrite mass matrix equation;Obtain inertial internal load by calculating hydrodynamic force, and the wave bending moment and wave shear force of the front section of mass section are calculated, and the frequency response function of ship movement and load;By setting short-term sea state and wave spectrum, response spectrum is obtained, and short-term prediction is carried out on response spectrum using spectral analysis method;According to the probability distribution of each short-term sea state in long service life, the long-term load extreme value prediction of ship structure is obtained.The correct wave load of clinker crane ship is successfully obtained;Similarly, the wave load prediction problem of the clinker crane ship with multiple clinker cranes can be solved.

The invention discloses a canal vertical type ecological slope protection structure with wave dissipation and fish trapping functions, which is formed by adjacently arranging a plurality of vertical type ecological slope protection units along the direction of a bank line, each vertical type ecological slope protection unit comprises a front side plate, a rear side plate, a left side plate and a right side plate, a partition plate is arranged in an enclosed space of the four side plates, and a space below the partition plate is used as a fish nest; a plurality of wave dissipation holes are formed in the upper part of the front side plate higher than the partition plate; a fish nest inlet is formed in the lower part of the front side plate; the left side plate and the right side plate extend forwards to form two opposite wing plates; fish nest communicating ports are formed in the left side plate and the right side plate, and the fish nest communicating ports in the two sides are opposite; during installation and arrangement, the wave dissipation plate faces a river channel, and the fish nest is out of the wave height acting range of ship traveling waves; the left side plates and the right side plates of the adjacent vertical ecological slope protection units are tightly attached, and the fish nest communication openings are aligned and communicated. According to the method, ship waves can be reduced, the anti-scouring capacity of the bank slope is guaranteed, and a multi-habitat fusion near-shore ecological system in which fishes, plants and even birds coexist can be constructed.

The present application relates to the technical field of ship wave compensation, in particular to a closed-loop feedback control method and system for a marine wave compensation medical platform, the method comprising the following steps: acquiring the attitude signal of the wave compensation medical platform and constructing a data set, and then constructing a lower platform pose prediction model to obtain the attitude prediction value at the future time; based on the data set and the lower platform pose prediction model, a residual prediction model is constructed to obtain the residual prediction value of the attitude prediction; a kinematics model of the lower platform is constructed, the attitude accurate value is determined through the attitude correction algorithm combined with the attitude prediction value and the residual prediction value, and then the motion back solution algorithm is used to solve the rotation angle of the servo motor, and the closed-loop feedback control of the wave compensation medical platform is realized. The present application can realize accurate control of the wave compensation medical platform in complex environment, improve the wave compensation effect of the wave compensation medical platform, and thus reduce the risk of offshore medical treatment.