130 results about "Wave loading" patented technology

The invention discloses an integrated fan pneumatic-hydrodynamic-servo-elastic-plastic coupling analysis system and method, and belongs to the technical field of offshore fan numerical simulation calculation. According to the method, a coupling model of an offshore wind turbine under the environment load effect is established, a rotor cabin assembly is simulated through a multi-body dynamics method, and interaction of a supporting structure and pile soil is simulated through a finite element method. By introducing a prediction correction loose coupling algorithm, joint simulation between a multi-body system and a finite element system is realized. The method is not only suitable for coupling dynamic response analysis of the offshore wind turbine under the action of conventional wind wave load, but also suitable for elastic-plastic coupling analysis of the offshore wind turbine under the action of extreme typhoon load or earthquake load. In addition, the method not only can be used for coupling analysis of the offshore wind turbine of a traditional steel supporting structure, but also is suitable for integrated coupling analysis of the wind turbine of a novel steel-concrete structure on land or on the sea.

The invention discloses an operation control method for a wind power generation system, and relates to the technical field of operation control, and the method comprises the steps: obtaining the historical operation data of a wind power generation system in a target sea area, taking an offshore environment factor as an interference factor, and coupling the time-space parameters of ocean turbulence intensity, wave load and salt spray corrosion rate; establishing a fan-marine environment digital twinborn body; operation data is acquired in real time, synchronous mapping and dynamic updating of the digital twin are realized, and a state prediction model is established in combination with historical operation characteristics; taking the maximum power generation efficiency and the minimum mechanical load as a multi-objective optimization function, and introducing a model prediction controller to obtain an optimal control sequence of the wind power generation system in a future time domain of each control period; and selecting a first control instruction in the optimal control sequence, issuing the first control instruction to a physical fan torque controller and a variable pitch system in real time, realizing rolling optimization of the wind power generation system, and obtaining a self-adaptive operation control scheme of the wind power generation system. The power generation benefit of the whole life cycle is improved.

The invention relates to the technical field of water conservancy projects, in particular to an anti-seepage control system for an earth rock cofferdam. The method comprises the following steps: periodically acquiring external hydro meteorological data and internal structure response data of a cofferdam through a sensor group based on a monitoring unit; establishing a multi-field coupling model based on a finite element method through a model building unit, and dynamically coupling a wave load, a tidal water level and an osmotic pressure field; the minimum cofferdam crest elevation is determined by comparing the difference between the minimum safety coefficient and a preset safety coefficient on the basis of a decision-making unit; and based on the analysis unit, inputting the minimum cofferdam crest elevation into the multi-field coupling model to obtain the maximum value of the hydraulic gradient of the escape point of the downstream slope within a third preset time period, determining an anti-seepage state based on the maximum value, and adjusting related parameters based on the anti-seepage state. The seepage risk of the cofferdam is monitored, predicted and actively controlled in real time, so that the seepage rate of the earth rock cofferdam is reduced.

The invention relates to the field of ocean renewable energy technology utilization, and provides an oscillating water column type wave energy power generation device based on a superstructure, which comprises an oscillating water column main body, a superstructure assembly, a top shell and a power generation unit, and is characterized in that the interior of the oscillating water column main body is provided with the superstructure assembly formed by a plurality of guide plates which are arranged along the radial direction and extend in a horn shape; the oscillating water column body is internally divided into a plurality of independent oscillating water column cavities with gradually-changed sizes by combining with the partition plate assembly, an air chamber is defined by the top shell and the oscillating water column body, and airflow energy generated by water column oscillation driving is converted into electric energy through the power generation unit. The power generation unit can adopt a plurality of split type air turbines to generate power or a general type air turbine to generate power. The special fluctuation performance of the superstructure is fully exerted, efficient broadband capture and wave absorption are achieved, meanwhile, wave loads are effectively reduced, diversified integration of wave energy power generation devices is developed, sea area resources and operation and maintenance cost are saved, and negative environmental influences are reduced.

The invention discloses a full-coupling numerical simulation system and method for a wind and wave hybrid energy obtaining system, and relates to the field of data analysis, and the method comprises the steps: generating an aerodynamic load of a current period based on incoming flow wind speed and coupling dynamics response data of a previous simulation period; based on preset mooring system parameters and the coupling dynamics response data of the previous simulation period, generating a mooring load of the current period; in the random wave field, determining the hydrodynamic force of the floating foundation entity and the wave energy power generation entity, and generating a wave load; determining a PTO force based on the relative motion between the power generation platform and the wave energy power generation entity; and taking the aerodynamic load, the mooring load, the wave load and the PTO force as external force terms in the same time domain kinetic equation for unified solution, and obtaining a coupling kinetic response of the current simulation period. According to the full-coupling numerical simulation system and method for the wind and wave hybrid energy obtaining system, the simulation precision of the simulation system can be improved, and the overall calculation efficiency of the system is improved.

The invention discloses a wave pitching motion control method and system for an offshore floating type wind turbine generator, and belongs to the technical field of offshore wind power equipment control. The method comprises the following steps: signal acquisition: acquiring unit operation state, marine environment and pitching motion state parameters in real time; wave load prediction: predicting a future wave load based on the improved LSTM neural network model; evaluating a pitching motion state, pre-judging a motion trend through a kinetic model, and judging whether the motion trend exceeds a safety threshold value or not; cooperative control instruction generation: generating cooperative control instructions for fine tuning of a variable pitch angle, a generator torque and a cabin yaw angle based on an MPC algorithm; and control execution and feedback correction: driving an execution mechanism to act and dynamically correcting a control instruction. By accurately predicting the wave load, cooperatively adjusting multiple controllable components and dynamically correcting, efficient and accurate suppression of pitching motion is achieved, and the unit operation stability, the wind energy capturing efficiency and the equipment safety are improved.

The application provides a ship structure fatigue strength analysis method and system, which calculates the main engine vibration load and the wave load received by the ship structure based on the ship data, the characteristic data of the ship structure and the global sea state data, then calculates the stress response process under the combined action of the wave load and the main engine vibration load, the spectral density function of the stress response process, each order spectral moment of the stress response process and the zero-crossing rate of the stress response process, then calculates the stress response and the stress response peak of the ship structure under the action of the sinusoidal vibration load, calculates the stress cycle number of the ship structure based on the stress response and in combination with the fatigue life S-N curve, further calculates the fatigue damage under the action of the main engine vibration load, and finally calculates the total coupling fatigue damage under the long-term sea state, and further calculates the fatigue damage of the ship structure under the combined action of the high and low frequency loads, which effectively improves the accuracy and reliability of the ship structure fatigue strength calculation.

The invention provides a permeable breakwater and a design method thereof, and relates to the technical field of permeable breakwater. Aiming at the lack of a design method for high-precision environment coupling and high-accuracy structure stress prediction during design of a permeable breakwater in the prior art, the method comprises the following steps: establishing a wave-structure-foundation coupling model based on structure stress data, environment soil characteristics and a transmission coefficient of waves; s5, selecting a wave-structure-foundation coupling model, simulating different structure parameter combinations based on the wave-structure-foundation coupling model, and when the simulation results do not meet the target requirements, circularly executing the steps S2 to S5 until the simulation results meeting the target requirements are screened out, and determining a corresponding final structure parameter combination. The cooperative working mechanism of the reduction foundation and the pile foundation is realized, the dynamic interaction of the wave load and the structural response is simulated, and the environmental coupling precision and the structural stress prediction accuracy are improved.

The invention provides a wave power generation flexible net cage, and relates to the technical field of deep sea cultivation, the wave power generation flexible net cage specifically comprises an in-cage floating frame, a power generation assembly and a floating frame assembly, the in-cage floating frame and the floating frame assembly are connected to form a drop-shaped outer contour, water flow can flow around more smoothly, vortex and resistance peak values are reduced, and therefore the water flow load is effectively reduced; when subjected to wave impact, the floating frame in the box can swing through a hinge point, so that wave load is unloaded, the floating frame in the box and the floating frame assembly rotate relatively, the driving end of the generator is driven to rotate, wave mechanical energy is converted into electric energy, self-power supply or energy storage is achieved, the energy self-sufficient capacity is improved, and the generator can provide damping force in the rotating process; wave impact energy is absorbed and dispersed, local stress concentration of the structure is avoided, and therefore the service life of the wave power generation net cage is prolonged, the adaptability to severe sea conditions is improved, wave mechanical energy can be converted into electric energy, the wind wave resistance effect is excellent, and the manufacturing cost is low.

The invention relates to the technical field of pile-soil action stress analysis, and discloses a pile-soil action stress analysis system, which can accurately simulate the interaction between a wave load and pile-soil in a complex wave environment through a data acquisition module, a data simulation module, a data analysis module and a data display module, and can accurately analyze the pile-soil action stress through the data acquisition module, the data simulation module, the data analysis module and the data display module. Stress analysis, displacement analysis and pore water pressure analysis can be supported, then analysis results are displayed, and a scientific basis is provided for pile foundation design, construction and safety evaluation.

This invention discloses a water damping connection device for a floating photovoltaic pontoon breakwater, belonging to the field of marine engineering technology. It includes a water damping mooring device installed at both ends of the pontoon breakwater, with the connection ends of the pontoon breakwater being open. The water damping mooring device includes a water tank, a bottom plate, tie rods, a push plate, and a compression spring. The water tank is open at both ends and installed inside the pontoon breakwater. The bottom plate is connected inside the pontoon breakwater. The push plate is placed inside the water tank, with a tie rod fixedly connected to one end away from the bottom plate. The tie rods at both ends of the pontoon breakwater are connected via universal joints. The compression spring is sleeved on the tie rod, with one end fixedly connected to the push plate and the other end fixedly connected to the opening of the water tank. A check valve is provided on the push plate, controlling the water flow from the bottom plate towards the universal joint side. Through the annular gap design between the push plate and the inner diameter of the water tank, when the wave load increases, the push plate moves to compress the compression spring, and simultaneously, the water flows in the annular hole, generating water damping and effectively attenuating the peak connection force.

A concave windshield with a raised center that curves upwards to transfer wind pressure to the top; the concave sides of the windshield are designed at an angle of 40° to 60° to the ship's centerline, with the specific angle offset by 5° to 10° from the main deck line; a horizontal girder is installed at the center of the concave section and at the top of the cable guide hole, and a platform structure is installed in the middle of the horizontal girder to improve the structural strength at the load concentration point of the windshield; vertical girder is installed in the middle and on the sides of the windshield, and a strong structure is installed at the bottom of the middle vertical girder to resist the wave load.

The present application relates to the technical field of hydraulic engineering, and more particularly to a seepage control system for earth-rock cofferdams. The present application periodically collects external hydro-meteorological data and internal structural response data of the cofferdam through sensors based on a monitoring unit; a multi-field coupling model is established based on the finite element method through a model construction unit, dynamically coupling wave load, tidal level and seepage pressure field; the minimum cofferdam top elevation is determined by comparing the difference between the minimum safety factor and the preset safety factor based on a decision unit; and the minimum cofferdam top elevation is input into the multi-field coupling model based on an analysis unit to obtain the maximum value of the hydraulic slope of the backwater slope escape point within a third preset time period, the seepage state is determined based on the maximum value, and the related parameters are adjusted based on the seepage state. The present application reduces the leakage rate of earth-rock cofferdams through real-time monitoring, prediction and active control of cofferdam seepage risk.

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.

The invention discloses a soft soil revetment design method considering wave influence, and belongs to the technical field of coast engineering. The method comprises the following steps: analyzing wave elements and load data by simulating tide and wave propagation, and determining main factors influencing the deformation and stress of a revetment structure; non-linear characteristics of soft soil are simulated, and a stress path of a soil body under the action of a wave load is considered; finite element software is adopted to establish a bank protection structure model, and factors of interaction, large deformation and contact problems of the structure and a soil body are considered; through data simulation, the influence of the wave height and the wave moment on the stress and deformation of the structure is clarified; and dynamic data of the environment where the bank protection project is located is fed back to numerical simulation of the bank protection structure, and input parameters of the model are continuously updated, so that the model can dynamically reflect changes of actual project working conditions. The wave load and soft soil coupling effect can be accurately reflected, the accuracy, safety and economical efficiency of revetment design are improved, and the method is suitable for various soft soil foundation revetment projects.

The application discloses a wind turbine multi-point and multi-direction complex load simulation system and method under a marine scour environment, and belongs to the technical field of offshore wind power. Three sets of load simulation devices are installed on the wind turbine tower model of the scour environment simulation device, which are respectively: the load simulation device for simulating the wind load acting on the wind turbine is located below the top mass block of the wind turbine tower model, the load simulation device for simulating the wave load acting on the wind turbine is located above the water surface of the sand pool, and the load simulation device for simulating the extreme condition wave load acting on the wind turbine is located at the equivalent position of the average wave height under the extreme condition above the water surface of the sand pool. The application realizes the accurate simulation of the complex offshore wind turbine environmental load by arranging the combined cyclic load simulation devices at three positions on the model with different heights and different angles, lays a foundation for exploring the full life service performance evolution law of the offshore wind turbine and other high-rise marine structures, and perfecting the design of the marine deep water foundation.

The present application relates to the technical field of structural response simulation, in particular to a ship container wave pressure intensity simulation method and system, in the present application, based on Fourier transform, frequency value, direction angle, energy coefficient, pressure amplitude and phase quantity are composed into a unified frequency domain vector, and the surface element pressure history is reconstructed by time step by time, so that the wave load is uniformly distributed in the spectrum domain phase, the frequency component phase superposition and the speed and heading offset are synchronously transmitted to each time point, the surface element pressure history and the sea state spectrum parameters are one-to-one corresponding, through the penalty function method, the displacement difference value and the allowable gap limit value are read at the node layer, the penalty coefficient is selected according to the constraint type to generate the penalty quantity, and the penalty quantity is superimposed to the node pressure record with the time step, the supporting, limiting and allowable movement state is quantified as the penalty term and is updated with the iteration increment, the constraint strength is uniformly controlled by the penalty coefficient grade table, and the working condition switching can reuse the grid and material input by replacing the matrix and penalty coefficient library.

According to the method, a surface gravity wave and inner interface wave velocity potential field is analyzed into a product form of a vertical characteristic item and a horizontal diffraction field, and dimensionality reduction solution of a three-dimensional wave problem is realized; a vertical characteristic function orthogonal system meeting free liquid level, seabed boundary and interface coupling conditions is constructed, horizontal diffraction potential is decomposed into an incident field, a local column and an adjacent column scattering effect, and a Bessel function addition theorem is applied to construct a closed linear equation set of a multi-column interference field; establishing an extended dispersion equation containing density spring layer parameters, and revealing a modulation rule of layered strength on complex wave propagation characteristics; and finally, through tensor product coupling of a vertical mode and a horizontal diffraction field, constructing a full-three-dimensional diffraction velocity potential analytical solution, synthesizing a cross-layer pressure field integral by adopting a domain decomposition technology, and establishing a multi-column array generalized wave excitation force forecasting model. According to the method, efficient analytical calculation of the wave load of the multi-column system in the layered fluid is innovatively achieved.

The present application belongs to the technical field of offshore renewable energy comprehensive development, and discloses an integrated device of a floating wind turbine-oscillating buoy wave energy device. A rigid connecting rod is driven by a float to generate electricity, and a lattice design is formed on the wave-affected part of the side column to reduce the wave-affected area and load. An energy-gathering arc-shaped plate is arranged on the side surface of the side column, and is controlled by a control terminal to form reflected energy gathering by lowering, to improve the wave energy conversion efficiency, or to be lifted to reduce the wave load. The wind turbine tower is extended downward, and a plurality of heave plate structures are arranged at the bottom to improve the overall system stiffness, effectively reduce the heave motion of the overall system, increase the relative motion of the overall system and the oscillating buoy, and improve the energy conversion efficiency. The present application reduces the wave load of the floating wind turbine equipment in severe sea conditions, improves the survival ability, durability and stability of the integrated equipment, gathers waves and extracts wave energy through the oscillating buoy wave energy conversion device, and realizes the complementary and efficient development of "wind-wave" energy in space and time.

The invention relates to the technical field of ocean engineering, and particularly discloses an oscillating water column type wave energy breakwater integrated system based on a superstructure. The system comprises a breakwater carrier which is internally provided with a superstructure formed by a plurality of arc-shaped flow guide plates which are coaxially arranged. The superstructure divides the internal cavity of the carrier into a plurality of independent sector-ring-shaped cavities with different radial sizes. The top of each sector-ring-shaped cavity is provided with a cavity top plate and a vent hole, and the vent holes are connected with a turbine generator through pipelines. The breakwater carrier may be designed as a floating structure anchored by a mooring system or as a bottom-seated structure that is directly bottom-seated. Through the superstructure design, a plurality of oscillating water columns with different inherent frequencies can be excited in the system, so that efficient capture and conversion of broadband wave energy are realized. Meanwhile, the wave absorbing performance is effectively improved, and the wave load is remarkably reduced.

% Disclosed is a non-probabilistic model-based intelligent reliability assessment method for corrosion damage to a ship hull structure. The method includes: collecting corrosion data of the ship hull structure, and performing interval processing on the data through an embedded data processing system to obtain a mean and deviation of a residual corrosion thickness; determining a resistance of the ship hull structure through hull structure resistance calculation software; measuring external load data such as wind and wave loads, sailing speed, and cargo's center of gravity, and determining external loads based on geometric characteristics of the ship hull structure; establishing a failure function and simulating a failure mode of the ship hull structure in a failure analysis module; and solving a non-probabilistic reliability index of the ship hull structure through an interval variable normalization algorithm, and displaying an assessment result and giving an early warning through a ship safety management system.

The invention provides a deep and far sea jacket foundation operation period characteristic change-oriented test system and method, and the system comprises a model box, a wave loading device, a wave dissipation structure, a fan scale model, an image collection device, a sensing measurement device, a control computer, and an image processing system. The model box is provided with a transparent observation surface, simulated soil and simulated seawater are arranged in the model box, the image acquisition device is located on one side of the transparent observation surface of the model box, the sensing measurement devices are arranged in the fan reduced scale model and the simulated soil around the fan reduced scale model, and the control computer and the image processing system are in communication connection with the image acquisition device and the sensing measurement devices. The wave loading device, the control computer, the image processing system, the image acquisition device and the sensing measurement device are synchronously started and run, complex physical phenomena are reproduced directly based on real physical tests and laws, and simplified assumption of numerical simulation is avoided; and the dynamic response process of the plastic flow of the soil body and the deformation of the pile body under the wave load is directly observed and quantified.

The invention discloses a wave reduction type offshore photovoltaic array based on a wave reflection principle and a design method, and belongs to the technical field of renewable energy source development. Establishing a cylindrical buoy array frequency domain hydrodynamic model, calculating wave transmission indexes of different parameter combinations in the target wave period range, and determining candidate parameter combinations according to the wave transmission indexes; establishing a structural finite element model of the reflection unit group based on the candidate parameter combination, and performing strength check; a coupling dynamic model of the array structure and the mooring system is established, motion response and mooring stress are calculated, and judgment is carried out based on a preset criterion; outputting a reflecting unit group buoy array parameter combination meeting the requirement; the problem that the engineering construction and operation and maintenance cost is high due to the fact that an existing offshore floating photovoltaic array depends on external wave prevention / wave dissipation facilities in order to reduce the wave action is solved, and reduction of wave loads in the array and improvement of structural economy are achieved on the basis.

The application provides a wave energy power generation device control method and system based on actual sea state wave load, and the control method comprises the following steps: selecting a motion-power response coupling model of a wave energy power generation device based on actual sea state wave load data; using the motion-power response coupling model to calculate the optimal value of a control parameter combination of the wave energy power generation device under actual sea state; determining a control strategy for a PTO unit and a power generation unit based on the motion response of a floater unit corresponding to the actual sea state wave load data and the optimal value of the control parameter combination, wherein the control strategy comprises an adaptive variable damping control strategy and a self-protection variable damping control strategy. The control method and system provided by the application can select the optimal control strategy based on the actual sea state wave load to control the wave energy power generation device.

This invention discloses a dam-break type wave-on test device and method, relating to the field of wave-on testing, and solves the problems of existing wave-on test devices being unable to achieve precise synchronous visualization of the flow field and failing to consider the deck wave load under the combined action of water and air. The invention includes a gate lifting system, a dam-break test water tank, a model attitude adjustment system, and a phenomenon observation system. The dam-break test water tank includes a water storage area, an impact area, and a baffle arrangement area. The water storage area stores test water, the impact area is used to place the test model for wave-on testing, and the baffle arrangement area is used to install sensors and place cables. The model attitude adjustment system is located below the impact area to adjust the model's attitude and control its lifting and lowering. The gate lifting system is located above the water storage area to control the gate's lifting and lowering. The phenomenon observation system records the wave-on test phenomena. Air is pumped into the water to simulate bubble breakage. This invention utilizes a high-speed camera to assist in analyzing the water movement path and simulates the deck wave load under the combined action of water and air by pumping air into the water.

The application relates to the technical field of anchor chain tension detection, and discloses an anchor chain section tension detection device and a detection method thereof, which comprises a tension detection mechanism, the top end of the tension detection mechanism is connected with a tension control mechanism, and the top end of the tension control mechanism is connected with an anchor chain section control mechanism. Through the arrangement of the tension detection mechanism, the anchor chain to be detected is divided into different conditions under the air reference state, the seawater corrosion state and the intermingled load state for detection, the overall fracture strength index of the anchor chain can be obtained, the tension change, the wave load and the seawater corrosion effect of the anchor chain can be controlled, different service conditions of the anchor chain under the air reference state, the seawater corrosion state and the intermingled load state can be simulated, the mechanical properties of the anchor chain under different states are compared and analyzed, the weak link of the anchor chain can be accurately positioned, the failure mechanism is revealed, and important reference is provided for the maintenance and replacement of the anchor chain.

The present application relates to the technical field of research on the interaction between ocean engineering structure and wave, in particular to a method for predicting wave slamming pressure distribution of shallow-submerged circular-arc bottom section ocean engineering component, comprising: obtaining wave slamming pressure data of the circular-arc bottom section ocean engineering component and extracting pressure envelope, establishing spatial coordinates along the direction of the structure bottom plate, adopting double Gaussian function and linear function superposition to construct component pressure distribution model, determining model parameters through nonlinear fitting, and predicting wave slamming pressure spatial distribution according to the fitting result. μ 1, μ 2The present application can effectively reflect two main pressure peak values existing in the actual wave slamming process through the superposition form of double Gaussian function, can clearly locate the potential slamming hotspot area of the structure bottom, and can be applicable to different wave periods and structure clearance conditions through parameter calibration, and can provide more reliable wave load prediction basis for ocean structure design.

The application discloses a kind of control method, device, terminal and storage medium of wind driven generator, specifically relates to wind driven generator operation control technical field, for solving the problem that existing control method is caused by the difference of wind and wave load direction dynamic response in marine environment, support structure bears intense asymmetric load, by real-time synchronous acquisition wind direction and wave direction data, calculate wind direction change rate and analyze support structure vibration signal to identify wave excitation dominant frequency component, when detecting wave excitation energy mutation and wind direction change rate is over limit, analyze wind wave direction difference, simultaneously determine wave spectrum energy concentration band by analyzing tower top motion trajectory, in combination with direction difference and wave energy concentration band, evaluate load asymmetric risk level, finally, according to risk level, yaw speed and variable pitch rate are adaptively adjusted, the precise identification and early warning of wind wave load direction mismatching condition are realized, and the operation reliability of wind driven generator under extreme weather is improved.

The application provides a stability evaluation method based on an envelope surface of a shallow foundation bearing capacity under wave load. The technical scheme is: collecting soil samples on the engineering site and carrying out test calibration of soil parameters; establishing a three-dimensional numerical model based on a modified Cambridge model and calculating the initial bearing capacity of the shallow foundation; selecting and applying representative amplitudes of wave load to the shallow foundation to obtain the horizontal-moment bearing capacity envelope surface under different amplitudes of wave load; calculating the actual horizontal and moment loads borne by the shallow foundation according to the on-site wave load and determining whether the actual horizontal and moment loads are below all the horizontal-moment bearing capacity envelope surfaces to determine the stability of the shallow foundation. The application can truly simulate the working condition of the shallow foundation bearing the combined action of horizontal and moment cyclic loads in the marine environment, calculate the bearing capacity envelope surface of the shallow foundation under different amplitudes of wave load, determine whether the shallow foundation has a safety hazard, and provide a reference for whether reinforcement treatment measures need to be taken for the in-situ shallow foundation.

This invention provides a method and system for analyzing ship wind and wave loads and dynamic response under short-peak wave sea states. Based on the characteristic parameters of wind and waves under different sea states and the ship's motion parameters, a long-peak wave model is established. The first wave surface equation is calculated in ground coordinates, and then transformed to the ship's stable coordinate system using coordinate and frequency transformation methods to obtain a second wave surface equation applicable to the ship's surrounding environment. A wave pressure model caused by the waves is then established and corrected using the exponential decay method. Finally, a multi-wave superimposed wave pressure model is obtained through coordinate and frequency transformation methods and harmonic superposition analysis. Specific calculation methods are used to calculate the disturbance force and disturbance torque, enabling more accurate prediction of the ship's dynamic response in wind and waves and more accurate assessment of the take-off and landing safety of shipborne helicopters under high sea state conditions, effectively improving calculation accuracy.