187 results about "Wave loading" patented technology

The invention relates to the technical field of fatigue evaluation, and discloses an offshore wind turbine blade frequency domain fatigue evaluation method and system based on an MIMO nonlinear dynamic system, and the method comprises the steps: collecting the load data of an offshore wind turbine blade; preprocessing the load data; an MIMO nonlinear dynamic system is established; establishing a dynamic mapping relation between the preprocessed load data and the frequency domain response by using an MIMO nonlinear dynamic system; decomposing the time domain dynamic response data by using a frequency domain decomposition method, and quantifying the influence weight of each frequency band load on the blade stress based on a frequency domain energy distribution matrix to obtain a frequency domain energy distribution function of the total stress; and calculating the fatigue damage of the blade through a frequency domain fitting optimization method based on the frequency domain energy distribution function of the total stress. The method solves the problems that fatigue damage evaluation confidence is insufficient under the multi-load coupling effect and actual engineering requirements are difficult to meet in the prior art, and has the characteristic that the coupling effect of the wind load and the wave load can be accurately processed.

The invention provides a cement-based marine floating structure stability control method based on a dynamic water tank adjustment algorithm, which is applied to a dynamic water tank adjustment system of a cement-based marine floating structure, and the system comprises a water tank module, a sensing network, an execution mechanism and a central control unit, the method comprises the following steps: monitoring the change of the water level in the water tank module and the shaking angle data of the cement-based offshore floating structure through a sensing network; the central control unit analyzes the data acquired by the sensing network in real time, predicts the wave load change trend in a period of time in the future, simulates the stress state of the structure, and generates a target water level value of the water tank module in combination with the characteristics of the structure material; according to the target water level value and the real-time water level value, the execution mechanism is controlled to adjust the water level of the water tank module so as to achieve stability control over the cement-based offshore floating structure, water tank adjustment and material characteristics are accurately matched, control failure or structural damage can be avoided, and then the structural stability is improved.

The invention provides a deep sea temporary platform large-diameter steel casing dynamic response analysis method, and relates to the technical field of deep sea engineering, and the method comprises the steps: building a three-dimensional explicit dynamic coupling model according to the typhoon frequent generation characteristics of a target sea area and steel casing structure parameters; according to the three-dimensional explicit dynamic coupling model, the wave load is decomposed, the vibration hammer load effect, the ocean current load effect and the internal wave current load effect are integrated, and a comprehensive dynamic load set of the steel casing is determined. By establishing a precise model, integrating multi-source loads, identifying a risk area, monitoring stress in real time and optimizing design parameters based on data, self-adaptive matching of steel casing design and a complex marine environment is achieved, the structural safety of the deep sea temporary platform steel casing is effectively improved, and the cost is reduced.

The invention discloses a hybrid nonlinear floating fan hydrodynamic load coupling calculation method. The method comprises the steps of obtaining a velocity potential of a wave field in a computational domain through OceanWave3D numerical simulation (a wave field calculation model), and performing post-processing to obtain wave field data; dividing an instantaneous wet surface according to the six-degree-of-freedom motion, calculated based on an OpenFAST (floating fan calculation model), of the floating fan in each time step, and performing pressure integration to obtain a Front-Krylov force; updating the hydrostatic stiffness matrix according to the real-time position change of the buoyancy center of the fan, and calculating hydrostatic restoring force; linear radiation force and diffraction force are calculated through time domain convolution of frequency domain data, nonlinearity of the radiation force and the diffraction force is considered based on an instantaneous wetting volume change coefficient, and hydrodynamic load and structural motion response calculation in the current time step is completed after the OpenFAST is coupled. According to the method, coupling calculation between the open source code OpenFAST and OceanWave3D is achieved, and compared with commercial software at the present stage, the method is more accurate in wave load calculation under the extreme wave sea condition.

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 a control method and device of a wind driven generator, a terminal and a storage medium, particularly relates to the technical field of operation control of the wind driven generator, and is used for solving the problem that a supporting structure bears violent asymmetric loads due to dynamic response differences of wind and wave load directions in a marine environment in an existing control method. Wind direction and wave direction data are synchronously obtained in real time, the wind direction change rate is calculated, supporting structure vibration signals are analyzed to recognize wave excitation dominant frequency components, and when it is detected that wave excitation energy suddenly changes and the wind direction change rate exceeds the limit, the wind wave direction difference is analyzed; meanwhile, a wave spectrum energy concentration frequency band is determined by analyzing the tower top movement track, the load asymmetry risk level is evaluated by combining the direction difference and the wave energy concentration frequency band, finally, the yaw speed and the variable pitch speed are adjusted in a self-adaptive mode according to the risk level, and accurate recognition and early warning of the wind wave load direction mismatching working condition are achieved. And the operation reliability of the wind driven generator in extreme weather is improved.

The invention provides a wallboard impact test device and test method for simulating a dampening load, and belongs to the field of bearing performance tests. Comprising a dampening wave impact load simulation loading module, a test wall plate is fixed through a test clamp tool module, and in the test impact process, obtained real-time monitoring data are sent to a controller of the dampening wave impact load simulation loading module through a test measurement module so as to complete closed-loop control of dynamic loads when dampening wave impact is simulated; the dampening wave impact load simulation loading module comprises a controller, a hydraulic power unit and a loading unit, and the controller compares experimental data of a dampening wave impact load real experiment with real-time simulation data obtained by the test measurement module, converts an obtained difference value into an electric signal and sends the electric signal to the hydraulic power unit; electric signals are converted into pressure loads through the hydraulic power unit, and actions are executed by the loading unit. According to the invention, the simulation effect of a real dampening wave-colliding service scene can be achieved.

The present invention relates to a method and system for predicting non - linear wave loads in ship structure design. When constructing the non - linear wave load prediction model STLN, a WLIP network model based on a neural network is constructed by using a numerical calculation data set of the ship to be designed; taking the model test regular wave data set as the target domain, knowledge transfer learning of non - linear wave loads is carried out to obtain a short - term prediction model FTLN for regular waves; for the short - term prediction model FTLN of regular waves, taking the model test irregular wave data set as the target domain, knowledge is transferred again for non - linear wave loads to obtain the non - linear wave load prediction model STLN; when predicting non - linear wave loads, for an irregular wave condition of the ship, the non - linear wave load prediction model STLN is used to obtain the wave load corresponding to the irregular wave condition. The present invention can quickly and accurately predict non - linear wave loads and meet the requirements in the ship structure design stage.

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 technical field of anchor chain tension detection, and discloses an anchor chain fixed section tension detection device and a detection method thereof.The anchor chain fixed section tension detection device comprises a tension detection mechanism, the top end of the tension detection mechanism is connected with a tension control mechanism, and one end of the top of the tension control mechanism is connected with an anchor chain fixed section control mechanism; through the arrangement of the tension detection mechanism, the to-be-detected anchor chain is detected under different conditions of an air reference state, a seawater corrosion state and a blending load state, so that the overall breaking strength index of the anchor chain can be obtained, and the tensile strength of the anchor chain can be detected by controlling the tension change, the wave load and the seawater corrosion effect of the anchor chain. Different service conditions of the anchor chain in an air reference state, a seawater corrosion state and a blending load state are simulated; by comparing and analyzing the mechanical properties of the anchor chain in different states, the weak link of the anchor chain can be accurately positioned, the failure mechanism of the anchor chain can be revealed, and an important reference is provided for maintenance and replacement of the anchor chain.

The invention discloses a novel floating breakwater-oscillating water column wave energy conversion device integrated system which comprises a breakwater assembly, the bottom of the breakwater assembly is fixed through an anchor chain, an air chamber is arranged in the breakwater assembly, the top of the air chamber is provided with an air hole pipeline, the air hole pipeline is connected with a turbine generator, and the turbine generator is connected with an oscillating water column wave energy conversion device. A permeable structure is fixed to the wave facing side of the breakwater assembly, and a gap is formed between the permeable structure and the breakwater assembly. A permeable structure, an oscillating water column wave energy device and a floating breakwater are integrated, the permeable structure is used for dissipating high-frequency short waves, reducing wave loads acting on the structure and improving the stability and survivability of the structure, and in order to improve the energy dissipation effect of the permeable structure, a certain distance is formed between the permeable structure and an air chamber structure; the OWC wave energy device is used for absorbing long-wave energy for power generation, and the blocking capacity of the integrated system to long waves is improved; through integration of the three, a basic platform is shared, sea area resources are saved, operation and maintenance cost is reduced, and diversification of functions of the integrated system is realized.

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 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 relates to a suspension tunnel, and discloses a double-pipe suspension tunnel vehicle-rail-pipe-cable coupling system dynamic response analysis method, which comprises the following steps of: constructing a space vehicle subsystem motion equation, establishing a rail-pipe-anchor cable subsystem motion equation, constructing a wheel-rail contact equation, and solving to obtain a vehicle transmission load borne by a rail; a double-pipe suspension tunnel vehicle-rail-pipe-cable coupling system dynamic model is constructed; and calculating a wave load by utilizing a Morrison equation, establishing a vehicle-rail-pipe-cable coupling system kinetic equation under the action of the wave load, and solving by adopting a separation iteration method to obtain the dynamic response of the pipe body, the anchor cable and the vehicle of the double-pipe suspension tunnel. According to the method, the enhancement effect of the double-pipe linkage structural component on the transverse rigidity of the double-pipe suspension tunnel and the train eccentric load of the suspension tunnel are fully considered, the dynamic equation of the coupling system is established, the dynamic response of the system can be accurately calculated, the calculation precision and efficiency are both considered, and theoretical support and a technical path are provided for design and construction of the suspension tunnel.

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 invention provides a slamming acceleration accurate measurement method for a low-speed water entry problem, and belongs to the technical field of ship wave load tests.The method comprises the steps that a piezoelectric acceleration sensor and a capacitive acceleration sensor are arranged at the center of a model to form a measurement system, and slamming acceleration signal measurement and data acquisition are conducted synchronously; collecting high-frequency acceleration data of the piezoelectric acceleration sensor; collecting low-frequency acceleration data of the capacitive acceleration sensor; and superposing and synthesizing the high-frequency acceleration data and the low-frequency acceleration data to obtain a synthesized slamming acceleration signal. According to the invention, the problems of static acceleration signal loss and zero drift of the piezoelectric acceleration sensor are solved through a numerical optimization mode of signal correction; compared with the independent measurement of a high-frequency response capacitive slamming acceleration sensor, the noise of the acceleration signals is reduced and the signal-to-noise ratio is improved while the accurate measurement of high-frequency and low-frequency acceleration signals is considered in the existing test scheme.

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 utility model discloses an offshore wind power multifunctional observation buoy which comprises a truss, an observation platform arranged at the top of the truss and a ballast block arranged at the bottom of the truss, the ballast block is used for lowering the gravity center of the buoy, and the truss is used for providing buoyancy. And the ballast block is fixed on a seabed through a mooring cable. The buoy is long and thin in overall structure, and compared with a traditional buoy, the height difference between the gravity center and the buoyancy center of the buoy is greatly increased, so that the stability of the structure can be greatly improved, a platform can be provided for various ocean observation devices, and high-quality observation of ocean wind resources and ocean hydrology is achieved; the buoy is composed of the slender trusses and the ballast blocks, namely, the whole structure of the buoy extends to the deep position of water, and the wave load borne by the structure can be greatly reduced.

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.