178 results about "Marine structure" patented technology

The invention relates to an ocean structure three-dimensional model and two-dimensional drawing mutual conversion method and device, and the method comprises the steps: building a three-dimensional structure model, and outputting a two-dimensional engineering drawing of a specified section of the three-dimensional structure model; and the two-dimensional engineering drawing is adjusted, so that the three-dimensional structure model can be updated in time. The problems that two-dimensional drawings output by traditional ocean structure design software do not conform to design specifications, and three-dimensional models corresponding to the two-dimensional drawings cannot be updated in time after the two-dimensional drawings are modified can be solved.

The invention discloses a fluid-solid coupling analysis method, system and model for cross-scale evolution of an ocean structure. The method comprises the following steps: establishing a numerical wave water tank; establishing a plurality of reinforcement layer material RVE models, obtaining a macroscopic mechanical property curve of the reinforcement layer material, and obtaining a corresponding stress-strain constitutive relationship; based on the stress-strain constitutive relation, a reinforcing layer component model of the laminated structure is established, a light deformable layer component model of the laminated structure is established, and the reinforcing layer component model and the light deformable layer component model are assembled to obtain an overall laminated floating structure; and S100, merging the laminated floating structure into the numerical wave water tank in the step S100, carrying out fluid-solid coupling numerical simulation under the action of waves, judging the working condition of plastic deformation of the floating structure according to a result, and obtaining a plastic damage area and an elastic-plastic evolution response of the laminated floating structure. According to the method, the water elastic-plastic response of the large floating structure under the action of waves can be solved and optimized.

The present invention belongs to the technical field of wind-induced vibration control of bridges, and provides a one-way friction energy dissipation device for controlling the flutter of large-span bridges. The device is quickly installed before the arrival of extremely strong winds, which can temporarily and significantly improve the flutter safety of the bridge, reduce its own wind-resistant design requirements, and significantly reduce the project cost. After the strong wind, it can be easily disassembled without affecting the beauty of the bridge or interfering with navigation under the bridge. The use of one-way bearings greatly reduces the weight, transportation, loading and unloading, and storage costs of the counterweight. The device can adapt to any static wind displacement, has good robustness, is safe and reliable, economical, fast, efficient and practical, and can be shared by multiple bridges at different times, greatly reducing its own and storage costs. The device can also be used for long-term vibration control of large marine structures such as floating offshore platforms, floating wind turbines, and temporarily docked ships under the combined action of wind and waves, and wind vibration control of gentle photovoltaic structures.

The invention belongs to the technical field of bridge wind-induced vibration control, and provides a one-way friction energy dissipation device for controlling flutter of a large-span bridge. The device is quickly mounted before extremely strong wind comes, the flutter safety of the bridge can be temporarily and greatly improved, the wind resistance design requirement of the device is lowered, and the construction cost is remarkably reduced. After strong wind, the device can be conveniently disassembled, the appearance of the bridge is not influenced, and under-bridge navigation is not interfered. The application of the one-way bearing enables the weight, transportation, loading, unloading and storage cost of the balancing weight to be greatly reduced. The device can adapt to any static wind displacement, is good in robustness, safe, reliable, economical, fast, efficient and practical, can be shared by multiple bridges in different periods, and greatly reduces the self and storage cost. The device can also be applied to vibration control of large ocean structures such as floating ocean platforms and floating fans and temporary berthing ships under the combined action of stormy waves and wind vibration control of soft photovoltaic structures for a long time.

The invention relates to the technical field of ocean structure monitoring, in particular to a method for monitoring the scouring degree of a pile foundation of an offshore wind power station through bubble tracing, which comprises the following steps of: 1, constructing a bubble feature data acquiring an underwater image, manually segmenting and selecting key bubbles, extracting contour features of the key bubbles and expressing the contour features by vectors, a Zernike moment is used for grouping according to shapes, and a bubble feature database is constructed; and 2, identifying underwater bubbles: obtaining an underwater background image, constructing a dynamic background, obtaining an image containing suspended particles, extracting a foreground main body through a background subtraction method, comparing contour features of the foreground main body with a bubble feature database, and screening out the bubbles. By introducing an innovative method combining image recognition, feature modeling and physical inversion, the key problems of bubble misjudgment, track loss, inaccurate flow velocity and the like in a traditional bubble tracing technology are effectively solved, and high-precision, low-cost and automatic monitoring of the scouring process of the offshore wind power pile foundation is achieved.

The invention relates to a double-pile foundation seabed dynamic response simulation method under the wave action based on a multi-physics field coupling model. According to the method, a Wave-Stratum-Seabed Interference (WSSI) model integrating wave-seabed-structure interaction is constructed, the interaction between waves and a double-pile foundation under different pile spacing ratios and incoming flow deflection angles is simulated on an OpenFOAM platform through a finite volume method (FVM), and then the dynamic response of a seabed is analyzed. The model comprises a wave sub-model and a seabed sub-model based on the Biot three-phase consolidation theory, and key parameters such as free surface rise, dynamic wave pressure, vertical pore water pressure, vertical effective normal stress and liquefaction depth can be accurately calculated. An effective simulation tool and method are provided for pile foundation design and safety evaluation in ocean engineering, optimization of the pile foundation layout is facilitated, and the stability of an ocean structure is improved.

The present invention generally relates to a process for fabricating a reduced graphene oxide (rGO)-based antifouling marine coating is disclosed. The process begins with preparing a dispersed graphene oxide solution, followed by chemical reduction using hydrazine hydrate at 90-95° C. for 3 hours to form a dispersed rGO solution. This solution is then washed, filtered, and sonicated for 6 hours to ensure stability. A polymer solution is prepared by dissolving 40-50 wt % epoxy resin in acetone at 50° C. The antifouling composite is then formed by combining the rGO solution, 10-15 wt % zinc oxide nanoparticles, and 1-5 wt % carbon nanotubes with the polymer solution, followed by 6 hours of sonication at room temperature. Finally, the resulting composite material is applied to a substrate as a coating using spraying, brushing, dipping, or spin coating. This coating offers a promising solution for preventing biofouling on marine structures.

The invention relates to a marine environment mass concrete construction and crack repairing method, which comprises the following steps: in a mass concrete construction stage, carrying out aggregate precooling, carrying out layered intermittent pouring by using the precooled aggregate, and carrying out cooling treatment at the same time, so that the internal and external temperature difference is controlled within 20 DEG C; if cracks appear on the mass concrete, a polymer modified cement-based composite material is prepared for repairing, the polymer modified cement-based composite material comprises composite gel, a macromolecular tackifier and aggregate, the composite gel is based on 60%-70% of Portland cement, and 5%-8% of nano silicon powder and 10%-15% of fly ash are doped; the macromolecular adhesive comprises 0.5%-1.2% of polyacrylamide or 2%-3% of epoxy resin emulsion. When the scheme is used for repairing marine mass buildings, the overall viscosity of concrete can be improved, the internal and external temperature difference of the concrete is reduced, and the overall impermeability of the concrete repairing material is improved.

The invention discloses marine concrete resistant to chlorine salt erosion and a preparation method thereof, and belongs to the technical field of building materials. The marine concrete is prepared from the following components in parts by mass: 280 to 350 parts of cementing material, 1100 to 1200 parts of aggregate, 150 to 180 parts of mixing water and 2.5 to 4.0 parts of high-efficiency water reducing agent, and the cementing material is prepared from 210 to 270 parts of ordinary Portland cement, 50 to 70 parts of superfine slag powder and 10 to 20 parts of modifier on the basis of the cementing material; on the basis of the modifier, the modifier is prepared from 30 to 45 parts of hexacalcium aluminoferrite, 25 to 35 parts of metaettringite, 20 to 35 parts of tobermorite, 3 to 6 parts of nano attapulgite and 2 to 4 parts of a nano composite material. The components can accelerate the early hydration of cement and the volcanic ash reaction process in the concrete hardening process, so that the concrete can form a compact microstructure in the curing period and cooperate with the curing effect of a hydration product on chloride ions, thereby remarkably improving the chloride ion penetration resistance of the concrete, prolonging the service life of the structure and improving the concrete quality. The method is suitable for port engineering, maritime work structures and buildings in salinized soil areas.

The invention relates to an open boundary circulating flow and reconfigurable terrain collaborative maritime work scouring intelligent test system and test method, a maritime work structure test model is installed at the center position of a main body structure inner cavity test section, and a set area with the maritime work structure test model as the center is used as a main test section; the open-boundary circulating flow generation system realizes back supplement and closed-loop operation of circulating water channels of the left bank and the right bank; a multi-beam three-dimensional terrain scanner is installed on the side portion of the large-span electric measuring bridge system, and sand bed terrain and scour pit three-dimensional shape data are obtained; a three-dimensional acoustic Doppler current meter and a capacitive wave height meter are installed on the track type instrument bridge measuring system, and multi-dimensional dynamic monitoring is conducted on the sand bed terrain and the scouring pit; the multidirectional irregular wave generation system is used for simulating regular waves and irregular waves in an offshore environment. According to the invention, the aspects of structure scale, terrain coupling and measurement and control feedback intelligence are comprehensively upgraded, and a more real and reliable test basis with strong engineering adaptability is provided for research on scouring stability of major ocean engineering.

The present invention discloses a device and method for measuring the deformation of an off - shore wind turbine tower, which relates to the technical field of intelligent monitoring of ocean structure engineering. It includes: a lateral displacement monitoring module is fixedly installed on the top outside the nacelle, and a laser monitoring module is adaptively installed inside the tower. The lateral displacement monitoring module and the laser monitoring module are both signal - connected to the monitoring unit, and the monitoring unit aggregates the monitoring signals of the lateral displacement monitoring module and the laser monitoring module to calculate the deformation of the off - shore wind turbine tower. The present invention simultaneously obtains the lateral displacement of the tower by using two monitoring means, compares and analyzes the displacement values obtained by the two means, takes into account the calculation errors of the two methods, finally calculates a monitoring result of the lateral displacement of the tower, and gives an alarm in time for the over - limit result. The present invention uses two means to conduct real - time comparative monitoring of the tower deformation, greatly improving the accuracy of the monitoring result and avoiding errors and interference.

The invention discloses a marine building foundation scour risk assessment and control method. The method comprises the steps that S1, the scour risk of a marine building foundation is defined; s2, marine building foundation scouring risk factor identification and risk estimation; s3, determining a scour risk grade standard, an acceptance criterion and a control strategy of the marine building foundation; s4, constructing a foundation scouring risk evaluation model, and evaluating the foundation scouring risk grade of the marine building; and S5, performing decision-making control on the scouring risk of the marine building foundation. According to the method, a reasonable scour protection strategy is provided for main risk factors, and the construction and operation cost of the marine building is reduced.

The invention discloses a modified nano hydrated calcium silicate chloride ion curing agent as well as a preparation method and application thereof, and belongs to the technical field of chemical materials. The curing agent is composed of 65-75 parts of synergistically modified nano calcium silicate hydrate, 10-20 parts of mesoporous silica with a high specific surface area, a composite dispersion stabilizer with a specific ratio, and an active activator compounded by triethanolamine and anhydrous sodium sulfate. The nano calcium silicate hydrate is synergistically modified by gamma-aminopropyltriethoxysilane and sodium dodecyl benzene sulfonate, so that the nano calcium silicate hydrate has the excellent performance that the zeta-potential absolute value is greater than or equal to 25 mV, the dispersity is high, and the chloride ion binding capacity is improved by greater than or equal to 40%. Through the synergistic effect of all the components, the technical problems that an existing chloride ion curing agent is low in adsorption capacity, poor in selectivity, prone to agglomeration in concrete and the like are solved, and the chloride ion curing agent is particularly suitable for improving the durability of the concrete in harsh chloride salt environments such as port engineering and maritime work structures.

The invention relates to the technical field of ocean engineering, in particular to a wave force estimation method which can accurately predict a circular rod piece and the like in an ocean structure located in an area near a free surface, and is particularly suitable for wave force estimation of a cylindrical structure horizontally arranged in an extreme wave environment under the action of transient strong nonlinear waves. The wave load calculation method for the near-free-surface cylindrical structure in the marine environment specifically comprises the steps that a wave force calculation model is established based on a classical Morrison equation, a focused wave field is constructed, focused waves are constructed by superposing a plurality of regular wave components, and the focused wave field is constructed by superposing a plurality of regular wave components; compared with the prior art, the method has the advantages that the applicability is wider, broadband multi-component focused wave field modeling can be effectively processed, and the method is particularly suitable for being applied to engineering early-stage design and parameter sensitivity analysis.

The invention discloses a sewage treatment stirring device and method.The sewage treatment stirring device comprises a stirring pool, the middle of the stirring pool is provided with a stirring device, the periphery of the stirring device is provided with a vortex-induced column array, the vortex-induced column array is composed of a plurality of vortex-induced column units, and the lower ends of the vortex-induced column units are connected with lower displacement mechanisms; the lower displacement mechanism is mounted at the bottom of the inner wall of the stirring tank, the upper end of each vortex-induced column unit is connected with an upper displacement mechanism, the upper displacement mechanisms are mounted on a suspension arm, the suspension arm is fixed outside the stirring tank, and the vortex-induced column units can perform two-degree-of-freedom movement; on the basis of computational fluid mechanics and ocean structure dynamics, a vortex-induced vibration principle is reversely utilized, and energy for damaging a structure by vortex-induced vibration is converted into mechanical energy for stirring fluid through a special structural design and two vortex-induced vibration excitation methods.

The invention discloses a main scale optimization design method for a floating type foundation of a floating type draught fan, and relates to the field of ocean structure design optimization, and the method comprises the steps: determining a change interval of main scale parameters of the floating type foundation based on mother type main scale parameters, and randomly generating a plurality of groups of candidate main scale parameters, constructing a floating foundation model by using a parametric modeling method; determining candidate weight distribution parameters corresponding to the candidate main scale parameters, transferring a hydrodynamic analysis module, and performing hydrodynamic calculation on the floating foundation model by taking the candidate weight distribution parameters as input; and determining a comprehensive objective function and constraint conditions according to a calculation result, solving a main scale parameter set when the comprehensive objective function is optimal by adopting a multi-objective particle swarm optimization algorithm under the constraint conditions, and obtaining a floating foundation main scale optimization design scheme. An intelligent optimization algorithm is combined with an automatic water transfer hydrodynamic analysis module, so that the efficiency and precision of the main scale optimization design of the floating foundation are effectively improved.

The invention discloses an antibacterial and anti-adhesion coating, an antibacterial and anti-adhesion coating as well as a preparation method and application of the antibacterial and anti-adhesion coating, and belongs to the technical field of coatings. According to the antibacterial and anti-adhesion coating provided by the invention, the raw materials in proper parts by mass are selected, the raw materials are matched with one another, and particularly, the zwitterionic copolymer and the polypyrrole / barium titanate composite particles have a good synergistic effect, so that the obtained antibacterial and anti-adhesion coating has good antibacterial property and antibacterial adhesion; the antibacterial and anti-adhesion coating prepared by using the antifouling agent has a lasting antifouling effect and can be widely applied to ocean structures, and the service life of the ocean structures is prolonged.

The invention discloses an offshore wind turbine tower deformation measuring and calculating device and method, and relates to the technical field of intelligent monitoring of ocean structure engineering.The offshore wind turbine tower deformation measuring and calculating device is characterized in that a transverse displacement monitoring module is fixedly installed at the outer top of a cabin, a laser monitoring module is adaptively installed in a tower, and the transverse displacement monitoring module and the laser monitoring module are both in signal connection with a monitoring unit; and the monitoring unit gathers monitoring signals of the transverse displacement monitoring module and the laser monitoring module to measure and calculate the deformation of the offshore wind turbine tower. According to the method, the transverse displacement of the tower drum is obtained at the same time through two monitoring means, the displacement values obtained through the two monitoring means are compared and analyzed, calculation errors of the two methods are considered, finally, a tower drum transverse displacement monitoring result is measured and calculated, and an over-limit result is alarmed in time. According to the method, the tower deformation is compared and monitored in real time by using two means, the accuracy of a monitoring result is greatly improved, and errors and interference are avoided.

The invention belongs to the technical field of ship and ocean structure design, and discloses a rotary cylinder boosting system which comprises an inner tower, an outer tower and a supporting assembly, the outer tower is arranged on the outer side of the inner tower in a sleeving mode and can rotate relative to the inner tower, the supporting assembly is located between the outer side of the inner tower and the inner side of the outer tower, and one end of the supporting assembly is flexibly connected to the inner tower; when the outer tower shakes relative to the inner tower, the supporting assembly can prevent the outer tower and the inner tower from colliding with each other. Stable support is provided for the outer tower through the inner tower, and when the outer tower and the inner tower shake, collision between the outer tower and the inner tower can be effectively avoided under the action of the supporting assembly, so that the overall strength of the rotary cylinder boosting system is improved, and the service life of the rotary cylinder boosting system is prolonged. The application of various load external forces such as wind power, inertia force, deck waves and the like in the sailing process can be effectively resisted, and the stability and the safety of the device are correspondingly improved.

The invention provides a device for ice load measurement and ice-induced vibration suppression and an ocean structure. The device for ice load measurement and ice-induced vibration suppression is characterized by comprising a fixed strut beam structure (2) which is arranged on the outer surface of an upright or nearly upright ocean structure and is axially parallel to the ocean structure, and a steel plate (1) covering the range of a tidal range zone is arranged on the outer side of the strut beam structure (2) in a sleeving mode. And a stress measuring device (3) is mounted on the inner side of the strut beam structure (2). The fixed strut beams and the steel plates are installed on the outer surface of the ocean structure, the contact form of sea ice and the structure is changed, the crushing mechanism of the sea ice is disturbed, the energy of the sea ice is absorbed, the vibration amplitude is reduced, meanwhile, real-time monitoring of the ice load is achieved, frequency locking vibration is eliminated, and the safety and stability of the structure are ensured.

The present application relates to the technical field of ship and marine structure, and discloses a kind of boarding gangway energy compensation control system, boarding gangway includes pedestal, bridge and the gangway oil cylinder for driving bridge rotation, the system includes: hydraulic pump station, first reversing valve, energy storage component, second reversing valve, third reversing valve, the piston rod side and the piston rod side of oil cylinder are connected with hydraulic pump station and energy storage component respectively, hydraulic pump station controls hydraulic flow direction by first reversing valve, realizes the lifting and lowering of bridge, energy storage component stores gravitational potential energy when bridge is lowered by second reversing valve and third reversing valve, and releases high-pressure oil when bridge is lifted to carry out energy compensation, to reduce the output demand of hydraulic pump station, can reduce the consumption of electric energy, improve energy utilization efficiency.

This invention relates to the field of marine multi-parameter information extraction technology, specifically to a method for extracting marine multi-parameter information based on terminology semantics. It introduces advanced clustering and classification algorithms to perform deep learning and optimization of marine terms; utilizes terminology expressive power and Chinese phrase structure rules to optimize the K-nearest neighbor algorithm to identify marine entities and their attributes in the text; performs entity and attribute extraction and standardizes the extracted entities and attributes; designs a maximum correlation algorithm to assess the importance of different parameters in specific marine events or processes; and matches the extracted parameter information with marine structured data through multi-dimensional correlation analysis to achieve multi-dimensional information association. Based on the analysis results, it outputs the optimized extracted content. By combining the ecosystem characteristics and seasonal changes of the sea area, it selects the parameters with the greatest impact on water quality, generating intuitive reports and recommendations to provide decision-making basis for managers.

The invention discloses an ocean structure design method based on bidirectional fluid-solid coupling. The ocean structure design method comprises the steps that S1, sea conditions are determined based on a sea area where an ocean structure is located; s2, establishing a fluid domain calculation fluid dynamic model and a structural domain finite element model of the ocean structure; s3, on the basis of the established fluid domain calculation fluid dynamic model and structural domain finite element model of the ocean structure, executing iterative bidirectional fluid-solid coupling simulation calculation for each sea condition to obtain a simulation result; s4, analyzing the simulation result, and identifying the maximum value and the spatial position of the key load parameter on the ocean structure; and S5, modifying and optimizing the design of the ocean structure based on the maximum value and the spatial position of the key load parameter to obtain the ocean structure meeting the requirements. According to the method, the structural performance of the ocean platform can be systematically evaluated with high precision, so that a designer is guided to carry out more scientific and reasonable design modification and optimization.

A scour protection unit comprises a barrier that is deployable over seabed soil beside a marine structure such as a pile. The barrier comprises a group of elongate arms that are pivotable relative to each other and flexible webs that interconnect neighbouring arms of the group. Concretion of at least one of the webs is promoted after deployment of the arms. Base arms are pivotably supported by a hub and base webs connect pairs of neighbouring base arms. The group of elongate arms further comprises an upright pillar arm, with an upright web extending between the pillar arm and one of the base arms to form an anti-scour vane. The base arms are pivotable downwardly and outwardly relative to the hub from a retracted state into a deployed state to form a base panel. In the base panel, the neighbouring base arms are splayed apart and the base webs extend between them to cover the seabed soil. Deployment of the base arms can also deploy the upright web.

This invention provides a mobile wind tunnel device capable of outputting uniform droplets, belonging to the field of icing and anti-icing technology for ships and marine structures. The device includes: a stabilizing rectangular cavity and a transitional circular-to-square cavity, the stabilizing rectangular cavity and the transitional circular-to-square cavity being connected. The circular opening of the transitional circular-to-square cavity is connected to a variable frequency fan. A honeycomb rectifier and multiple airfoil spray frames are installed inside the stabilizing rectangular cavity, with the honeycomb rectifier located between the variable frequency fan and the airfoil spray frames. This mobile wind tunnel achieves uniform droplet output, maintaining a stable airflow field through the honeycomb rectifier; by arranging heating tape in the water and air pipes inside the airfoil spray frames, the wind tunnel device can operate for extended periods in low-temperature environments without icing; and a control cabinet controls wind speed, water pressure, and air pressure to obtain icing data for the ship's superstructure under different wind speeds and droplet diameters.

The invention provides a wave environment numerical simulation method based on a gravity water wave solution, and the method comprises the steps: constructing a fluctuation generation quantity source item based on the gravity water wave solution, and obtaining a plurality of key parameters of the fluctuation generation quantity source item in combination with a discrete wave spectrum; a basic control equation of a computational domain is established based on Navier-Stokes, a fluctuation quantity generation source item and a wave absorption source item are respectively introduced into equations corresponding to a wave generation area and a wave absorption area, and accurate wave environment numerical simulation can be realized through solving. According to the method, the load range of wave action can be effectively widened, so that the method is suitable for generation of large and steep waves, has high numerical wave generation robustness, and is beneficial to evaluation of load and safety margin of ocean structures.

This invention discloses a comprehensive stress corrosion analysis device and monitoring method for marine structures. The device includes a stress loading device, a multi-channel microresistivity measurement device, and measurement components. The stress loading device can apply different elastic stresses to multiple sets of measurement components. Each set of measurement components includes a measuring element, a reference element, and a stress measuring element, and each set of measurement components has multiple monitoring areas. The multi-channel microresistivity measurement device includes a constant current source, multiple voltage measurement modules, and a relay module. The multi-channel microresistivity measurement device can sequentially acquire the resistance of different measuring elements and reference elements at different times, thereby obtaining the corrosion rate of the measuring elements under different elastic stresses. The comprehensive stress corrosion analysis device for marine structures disclosed in this invention can conveniently obtain the corrosion rate of measuring elements under different elastic stresses, thereby realizing the simulation of the corrosion rate of marine structures under different elastic stresses.

An angle-adjustable component icing measurement and runoff water collection device belongs to the technical field of icing and anti-icing research on ships and marine structures. This invention solves the problem in existing droplet icing measurement devices where the height and angle of the component under test cannot be adjusted, thus failing to cover most components on the ship's superstructure surface for icing testing. The component under test is mounted on the top of a lifting support via an angle adjustment component, and its height is adjusted via the lifting support. A limiting element is inserted into corresponding limiting through holes and blind holes to achieve circumferential limiting between two limiting cylinders, with the component under test fixed to the second limiting cylinder. This allows for changes in the angle and height of the component under test, enabling the acquisition of icing conditions at different windward positions on the ship's superstructure. It overcomes the limitation of traditional icing devices that can only simulate flow from a single direction, avoids the need for multiple component replacements, and effectively improves experimental efficiency.

The present invention belongs to the technical field of marine corrosion monitoring, and particularly relates to a real-time marine corrosion monitoring method, system, terminal and storage medium, including: obtaining real-time original data based on sensing devices arranged on marine structures, where the original data includes electrochemical data, environmental data, physical state data and corrosion state data; mapping the original data to a high-dimensional space based on a kernel function, and obtaining the enhanced features most relevant to the corrosion state in the original data mapped to the high-dimensional space based on an attention mechanism; establishing an LSTM model based on the time-dependent relationship of the corrosion state, inputting the enhanced features into the LSTM model, and outputting local time series features; performing weighted fusion on the enhanced features and the local time series features to obtain a corrosion state prediction model, inputting the enhanced features and the local time series features, and outputting corrosion rate prediction values, corrosion depth prediction values and corrosion risk score values. It can reflect the changes in the corrosion process in real time and improve the timeliness of decision-making.

The application relates to the technical field of ocean engineering, in particular to a wave load calculation method for a near-free-surface cylindrical structure in a marine environment, which can accurately predict a circular rod and the like in a marine structure located in a region near a free surface, is especially suitable for wave force estimation of a horizontally arranged cylindrical structure under the action of transient strong nonlinear waves in an extreme wave environment, and improves the precision of structure stress prediction and the safety of engineering design, and specifically comprises the following steps: a wave force calculation model is established based on a classic Morison equation, a focused wave field is constructed, wherein the focused wave is constructed by superimposing multiple regular wave components, so that an idealized free liquid surface profile is formed, and then horizontal wave force and vertical wave force are respectively calculated in the focused wave field, compared with the prior art, the method has wider applicability, can effectively process wide-frequency multi-component focused wave field modeling, and is especially suitable for application of engineering early design and parameter sensitivity analysis.