278 results about "Ballast" patented technology

The invention relates to the technical field of ocean engineering operation motion modeling and control, and particularly discloses a method and a system for calculating influence of dynamic response of a separation supporting device and a buffer coupling device on a ship pose in a floating support installation process. The method comprises the following steps: acquiring initial position information of a separation support device and a buffer coupling device at a previous moment; acquiring vertical position and attitude information of the dynamic positioning ship and the upper module; calculating the supporting force of the separation supporting device and the buffer coupling device at the current moment; calculating the vertical position and attitude information of the upper module and the dynamic positioning ship at the current moment based on the supporting force and the external ballast water load; outputting relevant parameters and judging whether the installation is completed or not. According to the method, a multi-degree-of-freedom coupling dynamic model is constructed, high-precision real-time simulation of device dynamic response and ship motion attitude in the continuous unsteady-state load transfer process is realized, key parameter monitoring and risk early warning are provided for floating mounting operation, and the operation safety and efficiency are improved.

The invention discloses an immersed tube butt joint installation method and system based on laser ranging and visual recognition, and belongs to the technical field of ocean engineering. The method comprises the steps that a laser target set is installed on the butt joint end face of an installed pipe joint, and a laser positioning set and a laser projector are installed on the butt joint end face of a to-be-installed pipe joint; after the to-be-installed pipe joint sinks, the laser positioning group is started to measure the distance to the target group in real time, meanwhile, parallel light beams are emitted to the other end face of the to-be-installed pipe joint through the laser projector, and the position of a light spot is collected through visual recognition to obtain posture deviation; the distance and deviation data are fused, the optimal pose of the pipe joint to be installed is calculated through an optimization algorithm, and then the offset of the end face center and the axis deflection angle are obtained; and according to the parameters, a regulation and control instruction is generated, and the ballast water system and the winch system are controlled to adjust the posture of the to-be-installed pipe joint till accurate butt joint is achieved. According to the invention, full-underwater, high-precision and automatic immersed tube butt joint is realized, and the dependence on an overwater measuring tower and a GPS (Global Positioning System) is eliminated.

The invention relates to the technical field of ship automatic control, and particularly discloses a self-adaptive adjusting system and method for a ship ballast water tank, and the system comprises a plurality of water level sensors, an attitude sensing module, a central controller and an execution mechanism which are installed in a distributed manner. And the central controller receives and fuses the multi-source sensing data by executing a stored computer program so as to solve real-time attitude parameters of the ship, compares the real-time attitude parameters with preset target attitude parameters, and generates a control instruction through an optimal distribution algorithm based on deviation. And the executing mechanism adjusts the water volume of each ballast water tank according to the instruction, so that the accurate control on the ship attitude is realized. By means of multi-source data fusion and intelligent optimization decision making, the problems that a traditional ballast water system is lagged in response and inaccurate in regulation and control are solved, and the safety and stability of a ship in the loading and unloading operation process are remarkably improved.

The invention relates to the technical field of ship stability control, discloses a ship stability control method and system, and introduces a real-time monitoring and adaptive adjustment mechanism for electrical parameters of a ballast pump driving motor. By acquiring the electrical parameter reference information of the ballast pump driving motor in the reference pipeline state, a dynamic performance evaluation reference is established. In the ballast water dispatching process, the system synchronously monitors the real-time electrical operation parameters of the ballast pump driving motor and compares the real-time electrical operation parameters with the reference information, and therefore whether the actual conveying efficiency of the ballast water system is lower than the expectation or not can be accurately judged in real time. The real-time judgment mechanism does not exist in the prior art, and the system can find and quantify the performance deviation in time.

The utility model relates to ship transfer technology field, and the utility model discloses a ship ballast water receiving port and discharge port outboard quick docking structure, semicircular electric permanent magnetism sucking disc is fixedly arranged at the end of support, and with the steel flange fixedly covered on the outside wall of transfer joint of transfer pipe is set up magnetically, underwater camera is several, and all are fixedly arranged on semicircular electric permanent magnetism sucking disc, inflatable seal ring is fixedly covered on the outside wall of transfer joint of transfer pipe, and the outside wall of inflatable seal ring and the inboard wall of ballast water discharge pipe's port are set up and move and resist the contact, positioning locking hydraulic cylinder assembly sets up on the transfer joint of transfer pipe, guarantee the transfer head of transfer pipe and the discharge port of ballast water discharge pipe's docking precision and fast, and can fix transfer pipe in the ballast water discharge pipe outside the outboard, ensure that the outward propelling force that discharges ballast water in cabin can not move transfer pipe, guarantee that ballast water is safely transferred to the shore.

This invention discloses a cross-modal attribution method and system for ship energy efficiency anomalies based on a structural causal model, relating to the field of intelligent ship energy efficiency monitoring and anomaly causal attribution technology. The method includes: collecting multimodal ship energy efficiency monitoring data and mapping it to a multimodal operating condition heterogeneous graph; performing posterior completion of missing nodes based on structural equation constraints and historical samples of the same operating conditions; performing online Bayesian structural updates using speed, ballast draft, and sea state as trigger conditions to obtain an adaptive directed acyclic graph; applying causal intervention to the main engine load rate deviation and propeller propulsion efficiency deviation on the adaptive directed acyclic graph, calculating the causal contribution rate of each variable to the overall ship energy efficiency deviation, and generating cross-modal attribution results. This invention can improve the accuracy, interpretability, and targeted operation and maintenance handling of ship energy efficiency anomaly root cause localization.

The invention provides a floating fan active ballast system and a control method thereof. The system comprises a sensing module, a control module, an execution module, a power supply module, a shore-based remote control module and a communication module. The sensing module collects platform attitude and in-cabin liquid level data in real time through a multi-redundancy sensor; the control module adopts a triple-redundancy architecture and generates a load adjusting instruction in combination with an intelligent algorithm; the execution module realizes accurate allocation of ballast water through cooperative operation of a redundant water pump and a valve; the power supply module adopts a dual-power design to ensure continuous power supply; the shore-based remote control module realizes remote monitoring and maintenance; the communication module guarantees data interaction and instruction transmission. The single-point fault resistance of the system is improved through multi-redundancy design, high-precision and quick-response attitude adjustment is realized by combining intelligent and adaptive control, and meanwhile, multiple operation modes are integrated, so that the reliability and safety of the system in a complex marine environment are ensured.

The utility model relates to the technical field of underwater engineering, in particular to an underwater arranging and laying device under high flow speed. Comprising arrangement, and a first ballast part and a second ballast part are fixed to the two ends of the arrangement respectively; the winding drum is used for winding, arranging and rolling to form an arranged roll; a strip-shaped groove extending in the axial direction of the winding drum is formed in the surface of the winding drum. When the first ballasting piece is arranged on the winding drum to form the arrangement roll, the first ballasting piece is arranged in the groove, the first ballasting piece is used as the starting end, the space of the roll row is not occupied, and the roll row arranged in a large length can be achieved. The arrangement roll is arranged on the winding drum to be wound and arranged, and the second ballast piece is the tail end of the arrangement roll; during underwater arrangement, the two ends of the arrangement are pressed into mud, displacement or floating of the two ends of the arrangement at the high flow speed is prevented, the resistance to water flow and wave impact is enhanced, the later adjustment and correction time is shortened, the stability, safety and efficiency of underwater arrangement are improved, and meanwhile the maintenance cost and the influence on the environment are reduced.

According to the buffering control method for the berthing ball crane between the ships, a steel wire rope on a winch is output from the two sides of the winch, bypasses a buffering device and then is wound on a suspension arm on the other side of a base from one side of the base in the opposite direction, and through the cooperation of a first pulley block and a second pulley block, the steel wire rope is buffered. The steel wire rope is changed into the vertical direction from the horizontal direction and then is connected with the stopping ball in the vertical direction after bypassing the second pulley on the suspension arm, and meanwhile, the steel wire rope and the buffer device are always in a constant tension state under the action of the preset tension of the buffer device, so that the stopping ball is prevented from falling off when the stopping ball ascends or descends along with sea waves. The berthing ball can stably float on the sea surface to achieve sea wave compensation, so that the berthing stability between ships is improved, and meanwhile the situation that a steel wire rope for lifting the berthing ball is disengaged from a pulley block due to different tightness degrees caused by sea wave floating is avoided.

This invention provides a floating wind and wave energy integrated power generation device and its control method. The floating wind and wave energy integrated power generation device includes a floating base, a wind turbine, and a wave energy generation device. The wind turbine is mounted on the floating base. The wave energy generation device is mounted on the floating base and includes an electrically connected oscillating float and a wave energy storage device. The oscillating float includes an upper ballast chamber and a lower ballast chamber. Both the upper and lower ballast chambers include multiple ballast sub-cavities. Each ballast sub-cavity has a water inlet and a water outlet. A water inlet valve is provided at the water inlet, and a water outlet valve is provided at the water outlet. The technical solution provided in this application can solve the problems of low utilization rate and poor synergy of wind and wave energy in related technologies.

The application belongs to the field of offshore wind power, and discloses a typhoon-resistant composite wind turbine system, which comprises a foundation assembly, a tower tube arranged on the foundation assembly, and a wind turbine arranged on the tower tube. The foundation assembly comprises a central ballast water tank and a plurality of corner ballast water tanks arranged around the central ballast water tank. The central ballast water tank and the corner ballast water tanks are connected through a truss. The central ballast water tank is a hollow structure. The tower tube is inserted into the central ballast water tank and has a gap therebetween. The tower tube can move up and down and rotate horizontally relative to the central ballast water tank. A tower tube ballast water tank is arranged on the tower tube. The ballast water tank can change the internal draught every second, compensates for the foundation deviation caused by the wind speed and wave force, increases the platform draught depth and weight when the wind and wave are large, and maintains good stability.

The utility model discloses a floating type draught fan platform which comprises a buoy temporarily supported on a supporting column, the buoy is connected with the draught fan platform through a vertical steel cable, during construction, after a draught fan is provided with part of components, the draught of the floating type draught fan platform is increased, the buoy is emptied to provide vertical buoyancy, part of the weight of the draught fan is offset, and after the draught fan is hoisted, the buoy is connected with the draught fan platform through the vertical steel cable. The method comprises the following steps: dragging a floating fan platform to a deepwater area, injecting water into the platform to sink in the deepwater area, injecting water into the buoy to sink, and after the buoy is supported on a supporting structure of the platform, releasing a vertical connecting steel cable of the buoy and the platform, draining ballast water of the buoy, floating the buoy, separating from the platform, assisting in displacement of the buoy, and finishing installation of the fan. Construction is completed under the condition that the water depth of a wharf is insufficient by combining the separated floating cylinder with the fan platform.

The invention relates to the technical field of wind power equipment, and discloses a floating type wind power device which comprises a wind power unit and a wind power platform. At least three box type connecting structures are uniformly arranged in the circumferential direction of the fan base; the ballast block is coaxial with the fan base; and the damping device is arranged in the box type connecting structure in a sliding mode and comprises a damper, the end, away from the fan base, of the damper is anchored to the seabed through a first mooring system, and the end, facing the fan base, of the damper is connected with the ballast block through a second mooring system. The sliding damping device is arranged in the box-type connecting structure, the environmental load is introduced into the damper through the first mooring system, the inertia response of the ballast block is introduced into the damper through the second mooring system, two paths of input are coupled at the damper, vibration energy is consumed through the hydraulic damping effect, and the damping effect is improved. The stability and safety of the platform under complex sea conditions are remarkably improved, and the surging, swaying, heaving and yawing movement of the platform is effectively restrained.

The utility model discloses a local connection combination structure of a ballast type model ship, which relates to the technical field of ship model connection structures, and comprises a ship body, a splint layer is arranged on the upper surface of the ship body, a control room is arranged on one side of the upper surface of the ship body, an antenna is fixedly welded on the upper surface of the control room, and the upper surface of the control room is provided with an antenna. A cabin body is arranged on the lower surface of the ship body, a plurality of supporting frames distributed at equal intervals are fixedly arranged on the lower surface of the ship body, clamping plates are symmetrically and fixedly arranged in the cabin body, the clamping plates are connected with the corresponding supporting frames in a clamped mode, and main supporting beam grooves and a plurality of connecting grooves are formed in the supporting frames. According to the local connection combination structure of the ballast type model ship, through the clamping connection mode of the supporting frame and the clamping plate and the cooperation of the clamping groove and the receiving groove, the connection between the cabin body and the ship body is more stable, various external forces in the sailing process can be borne, and the risk that the cabin body is loosened or falls off is reduced.

The utility model provides an anti-rolling water tank device of a ship, which comprises a left anti-rolling water tank, a right anti-rolling water tank and a communicating tank communicated with the bottom of the left anti-rolling water tank and the bottom of the right anti-rolling water tank, the left anti-rolling water tank and the right anti-rolling water tank have the same height and are higher than the communicating tank, ballast water is loaded in the anti-rolling water tank device, and the communicating tank is communicated with the left anti-rolling water tank and the right anti-rolling water tank. The ballast water can flow left and right in the left stabilization water tank, the right stabilization water tank and the communication tank, and the top of the left stabilization water tank and the top of the right stabilization water tank are each provided with a vent hole. Reverse transverse moment is formed by means of gravity center change of ballast water in the cabins, so that the rolling angle of the ship is effectively reduced, air flow speed is limited by controlling the sizes of the vent holes in the stabilization water cabins, flowing limitation of the ballast water in the cabins and control over the back-and-forth change time of the ballast water in the left cabin and the right cabin are achieved, and the stability of the ship is improved. The requirements of rolling periods of different ship bodies can be met; the device is simple in structural form, easy to implement, low in cost and free of maintenance.

The invention discloses a self-adaptive ballast adjustment method for a new energy ship based on a vanadium redox flow battery. The method comprises the following steps: establishing a collaborative arrangement structure of a vanadium redox flow battery and a ballast water dual system; based on the parameters of the collaborative arrangement structure, a linearization model capable of defining the relation between moment balance and the ship heeling angle and the ship heeling angle is constructed; constructing a target function for adaptive ballast adjustment of the new energy ship based on the linearization model; establishing a ballast adjustment constraint condition for the target function; based on the constructed heuristic solving strategy, the objective function is solved according to the ballast adjustment constraint condition to obtain an optimal solution, and the optimal solution is the optimal adjustment scheme of the electrolyte tank and the ballast water tank in the collaborative arrangement structure; based on the optimal solution, self-adaptive ballast adjustment of the new energy ship based on the vanadium redox flow battery is achieved. The problems that a traditional ballast system is slow in response, low in precision, uncontrollable in energy and the like, and rapid adjustment and high-precision control cannot be achieved are solved.

The application belongs to the technical field of variable speed regulation, and discloses a continuous variable speed regulation experiment system and method for ship ballast, which comprises a ballast water hardware system and an upper computer remote control system; the ballast water hardware system comprises a water tank, a water pump control system and a remote communication system, and the water pump control system comprises a PLC master control and a pipeline system; the application develops a ballast water control system for model test, which can be used to replace the pressure iron to realize the adjustment of the draft and improve the efficiency. The application simulates the real ship ballast process and realizes the automatic control of the ballast process. The application saves the time for the ballast condition adjustment process in the model test and improves the test efficiency. The application realizes the state simulation of the ship model under the complex sea conditions in the dynamic adjustment process, and can realize the ballast condition adjustment at different speeds; the application breaks through the limitation of the test range and can carry out more experiments.

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 method and a system for analyzing mechanical characteristics of a dirty ballast under a dynamic-melting effect, and relates to the technical field of mechanical characteristics of ballasts.The method comprises the specific steps of collecting mechanical characteristic parameters and influence parameters of a dirty ballast sample, training an adversarial network according to the mechanical characteristic parameters and the influence parameters, obtaining simulation parameters, constructing a discrete element simulation model according to the sample parameters, and calculating the mechanical characteristics of the dirty ballast. The method comprises the following steps of: calibrating by using simulation parameters, inputting influence parameters of a to-be-analyzed dirty ballast into a calibrated model to obtain mechanical property parameters of the to-be-analyzed dirty ballast, acquiring key data such as stress standard deviation, sequentially generating a deformation coefficient, a strength damage coefficient and a bearing coefficient through data processing and correlation analysis, and comparing the bearing coefficient with a preset threshold value to obtain a to-be-analyzed dirty ballast model. Therefore, the bearing capacity of the dirty ballast to be analyzed is accurately evaluated. According to the method, multi-factor coupling is comprehensively considered, internal complex changes are accurately quantified, the bearing capacity of the dirty ballast structure under actual complex working conditions is accurately evaluated, and evaluation deviation is reduced.

The application discloses an anti-heeling pump with a blockage prevention function, and relates to the application field of the anti-heeling pump of a ship. The anti-heeling pump comprises a bidirectional axial flow pump, and a blockage prevention purification system is arranged on the side of the bidirectional axial flow pump. The blockage prevention purification system comprises a water inlet filter screen, a filtering mechanism, a flocculent filtering assembly and a coarse filter cylinder. The blockage prevention purification system is arranged at both ends of the bidirectional axial flow pump, and impurities in ballast water are filtered. When water in a right ballast water tank is transported to a left ballast water tank, the ballast water enters the water inlet pipe of the right blockage prevention purification system, is filtered by the water inlet filter screen, enters the axial flow pump, then enters the left blockage prevention purification system, and reversely flushes the water inlet filter screen of the left blockage prevention purification system. Subsequently, the ballast water is discharged from the water outlet pipe of the left blockage prevention purification system and enters the left ballast water tank. In the whole operation process of the pump set, the ballast water flowing through the axial flow pump is filtered by the water inlet filter screen, and damage of impurities to the pump body is reduced.

This application relates to a buoy and its manufacturing method. The buoy includes: an inner tube assembly forming a first cavity; an outer shell assembly fitted over the outer shell assembly, forming a second cavity surrounding the first cavity; functional instruments housed within the first cavity; and a ballast counterweight module housed within the second cavity. Both the inner tube assembly and the outer shell assembly are made of metal. The inner tube assembly and outer shell assembly together form a double-cavity structure. The second cavity, located on the outer side, provides primary buoyancy and ballast stability support, while the first cavity, located on the inner side, accommodates the functional instruments. Because both the inner and outer tube assemblies are made of metal, they possess excellent impact resistance, damage resistance, and collision resistance. Even if the outer shell assembly is damaged under external impact, the inner tube assembly, made of metal, can still provide pressure-resistant protection for the functional instruments, ensuring their safety.

The utility model provides a multifunctional port navigation mark, which relates to the technical field of navigation and comprises an anchoring system, a floating body, a mark body, a lighting system, a control system and a power supply system. The floating body comprises a cylindrical buoy, the interior of the buoy is of a cavity structure, and a ballast is placed at the bottom of the cavity of the buoy; the four sets of double-color LED lamp panels are arranged, the included angle between every two of the four sets of double-color LED lamp panels is 90 degrees, the four sets of double-color LED lamp panels face four different horizontal directions respectively, and therefore it is guaranteed that passing ships in all the directions can clearly see the four sets of double-color LED lamp panels. The double-color LED lamp panel has a function of emitting red or green light, and can realize a normally-on or burst flashing state according to a received instruction; the flashing frequency can be flexibly changed according to the received instruction, and clear information can be transmitted to passing ships by adjusting the color and frequency of the light; the problems that an indication signal of an existing navigation mark is single, and maritime information cannot be conveniently and accurately obtained by a sailoman are solved.

The utility model discloses a railway bridge underwater structure disease intelligent monitoring early warning device relates to monitoring early warning device technical field, and this device includes underwater pier attached type electric climbing support, bridge pier abutment vibration acceleration sensor, bridge integral ballast vibration acceleration sensor, data acquisition system, locomotive vehicle, pier abutment and bridge integral ballast main part, pier abutment is fixedly installed on bored pile foundation. The utility model is combined with the direct scanning of multibeam array sonar and the indirect verification of vibration signal, realizes the accurate identification and quantitative evaluation of underwater structure disease, avoids the limitation of single monitoring mode, constructs the closed loop process of underwater monitoring - data analysis - safety early warning with the automatic running of electric climbing support and the real - time transmission of multi - source data, can discover disease and early warning in time, and effectively prevents the bridge accident caused by underwater structure failure.

A method of testing installation of a module on an elongate member 12, wherein the module comprises at least two module parts (14, 16) configured to be assembled to one another around the elongate member, together forming a through-going passage 21 for receiving the elongate member, at least one resiliently deformable seat 30, 32 within the through-going passage for seating upon the elongate member, and an arrangement for securing the module parts to one another, which may take the form of straps 24, 26, the module comprising a channel 34 extending from an outer surface of the module to the through-going passage 21, and the method comprising: assembling the module parts about the elongate member and securing them to one another using the said arrangement; inserting a test rod (36) into the channel until an end of the test rod contacts the elongate member within the through-going passage, and determining whether depth of insertion of the test rod is consistent with proper installation of the module. Aspects include a module for installation on an elongate member, the module may be a distributed buoyancy module (or ballast or sensor module) intended for mounting on some form of underwater elongate member. Fig 2

This invention relates to a self-buoyant gravity-driven positioning pile and a stake-type aquaculture cage, comprising a pile body, a pile tip fixed at the bottom end of the pile body, a pile lifting eye plate fixed at the top end of the pile body, and three watertight baffles arranged vertically within the pile body. This self-buoyant gravity-driven positioning pile and stake-type aquaculture cage features a simple and low-cost pile construction. It utilizes the cage's own buoyancy to achieve autonomous pile driving and lifting, which is significantly cheaper than traditional methods using lifting systems. Therefore, it greatly reduces the cost of the aquaculture cage. The cage is easy to operate, freely lifting and lowering using its own ballast system to assist in fish harvesting, maintenance, adapting to tidal changes, and providing full-submersion typhoon resistance. Through the balance between its own buoyancy and gravity, and with the adjustment of the float's weight and the ballast system, it achieves pile driving, lifting, and float raising / lowering operations, greatly reducing construction and operating costs.

The invention relates to the field of separation equipment, in particular to a ship ballast water sediment receiving and treating device which comprises a receiving and separating device, a plurality of filtering mechanisms are arranged in the receiving and separating device, each filtering mechanism comprises a plurality of fixed rings and movable strips, movable columns are connected between the movable strips, and the movable columns are connected with a plug collecting rod together and penetrate through a top cover. The filter mechanism comprises a top spring abutting against the plug collecting rod, a back-flushing mechanism is installed in the tank body structure, and a top vibration mechanism is installed on the back-flushing mechanism and matched with the plug collecting rod. On the basis that the top spring, the fixed movable strip and the fixed ring form a filter grid structure, the top vibration mechanism drives the plug collecting rod connected with the movable strip to move upwards, and the plug collecting rod is driven to move upwards; the filter mechanism has the advantages that small vibration is generated, the flow speed of local gaps is increased, the movable column impacts the base to a certain extent during falling, large vibration is generated on the whole filter mechanism, a better vibration shaking-off effect is achieved, and some adsorptive organisms can be conveniently cleaned.

This invention provides a method for evaluating the stability of pile foundations for jack-up platforms, belonging to the technical field of pile driving operations for jack-up platforms in offshore oilfields. The method includes the following steps: Step 1, collection of pile foundation data; Step 2, selection of pile driving algorithm based on geological formation adaptability; Step 3, analysis of pile driving prediction curves; Step 4, recommendation of algorithms; Step 5, analysis of pile driving soil squeezing effect; Step 6, analysis of complex situations involving pile driving slippage; Step 7, analysis of soil parameter tables, pile driving depth curves, and relative puncture safety factors to determine pile driving puncture and conduct risk analysis; Step 8, determination of ballast methods suitable for on-site pile driving operations on jack-up platforms based on the pile driving curves and risk analysis; Step 9, compilation of a pile foundation stability evaluation report. This invention contributes to the safety of pile driving operations during the positioning of jack-up platforms in offshore oilfields, ensuring the safety of pile driving for jack-up platforms and the safety of large offshore facilities, enabling safe and efficient offshore positioning operations.

The invention discloses a sea rocket launching platform wave compensation control method based on deep reinforcement learning. The sea rocket launching platform wave compensation control method comprises the following steps: S1, collecting real-time motion state data; s2, inputting the motion state data into an improved Shenchang differential equation model; s3, constructing a strategy network according to a SoftActor-Critic algorithm, and generating a corresponding continuous control action signal; s4, the control action signal is input into a propeller control system and a ballast adjusting system, and combined compensation control over the posture and the position of the platform is achieved; s5, in a simulation environment, carrying out end-to-end joint training on the ShentActor-Critic strategy network and the ShentActor-Critic strategy network; and S6, realizing wave compensation of the offshore rocket launching platform in the wave disturbance environment in the platform control system. According to the invention, accurate prediction and adaptive compensation of platform stability control under complex disturbance are realized, and the control precision and reliability are significantly improved.

The application discloses a kind of throw load mechanisms for underwater vehicle, the left end cover and right end cover are respectively fixed with left and right ends of barrel in sealed manner, annular support plate is arranged on the inner wall of barrel, coil is embedded in the barrel on the left side of annular support plate, support sleeve is embedded in the barrel on the left side of coil, annular step is arranged on the inner wall of support sleeve, annular permanent magnet is embedded on annular step, the right end of compression sleeve is inserted in annular step;Control panel and battery are fixed in the barrel on the right side of annular support plate;The outer portion of moving rod is provided with ferromagnetic ring, spring is provided on the outer portion of moving rod, annular boss is arranged on the outer wall of moving rod;The left end of left end cover is fixed with left guide sleeve, vertical slot is arranged in left guide sleeve, the upper end of connecting rod is inserted in slot, the upper end of connecting rod is provided with insertion hole, the left end of moving rod is inserted in insertion hole, the lower end of moving rod is connected with counterweight;The application has the advantages of low power consumption and low cost.

The application discloses a test method for determining the dirtiness of a ballast bed, and comprises the following steps: screening the size of ballast particles according to the particle size range of the ballast; selecting the screening rate of ballast particles with different particle size ranges according to the ballast grading requirement; uniformly mixing the ballast particles with different screening rates; performing a drainage method test on the mixed ballast by layer compaction in a container to obtain the void ratio of the ballast pile under the grading condition; and filling the mixed ballast into a ballast box by layer compaction to perform a ballast box vibration test to obtain the dirtiness of the ballast bed. The application not only provides a new idea for determining the existing numerical simulation dirtiness of the ballast bed, but also provides a practical method and a theoretical reference for the performance evaluation and service performance prediction of the ballast bed.