36 results about "Regular wave" patented technology

The invention discloses a ship maneuverability prediction method, a ship maneuverability prediction system and a ship maneuverability prediction device taking propeller performance changes into regular waves. The method comprises the following steps: firstly, calculating the motion response, the second-order wave drift force and the drift moment of a ship body under different regular wave conditions based on a potential flow theory, establishing a wave force fitting equation taking the wave direction and the navigational speed as variables, and performing ship manipulation motion numerical simulation in regular waves based on an obtained calculation result; acquiring an input parameter range of the propeller in a manipulating motion state; establishing a CFD numerical model of ship propeller performance in regular waves, simulating heaving and pitching motion of the propeller under motion response, determining the range of the heaving and pitching motion, and calculating propeller thrust data under different wave conditions and input parameters; and carrying out regression analysis on the propeller thrust data, and fitting to obtain a prediction formula of the propeller thrust coefficient in the regular waves. The formula couples the wavelength-to-length ratio, the advance speed coefficient and the wave direction angle, and quantifies the dynamic influence of the wave on the propeller thrust.

The invention provides a circular pool wave making system and a wave making and absorbing method, and belongs to the technical field of ocean engineering equipment.The circular pool wave making system comprises a plurality of wave maker units distributed around the circumference of a circular pool at equal intervals; the wave maker unit comprises a linear motor; the linear motor is connected with a floater through a connecting rod; the linear motor is connected with the driver, the driver is connected with the upper computer, the upper computer sends a control command to the driver, and the floater floats on the water surface and has a motion freedom degree of vertical translation. By controlling the movement of each wave maker unit in the circular pool wave making system, full-circumferential wave making is realized, regular waves, irregular waves, rotating waves, annular focused waves and other focused waves in any shape can be made, and meanwhile, waves propagated to the periphery of a pool are absorbed based on an active wave absorbing technology, so that the wave making efficiency is improved. Therefore, various wave making requirements, including simulation of real sea conditions and wave making of extreme sea conditions, are met.

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 invention belongs to the technical field of ocean new energy, and provides an anchor system multi-floating-body array wave flow motion response analysis method and system, and the technical scheme is that a joint simulation method of multi-body dynamics and computational fluid mechanics is adopted to carry out the comprehensive modeling and analysis of a mooring type multi-floating-body array, and the wave flow motion response analysis of the mooring type multi-floating-body array is realized. A universal joint connection structure for platform connection is designed, and an equivalent concentrated mass-spring unit is introduced to simplify modeling of a mooring chain. Joint simulation is implemented in a numerical wave generation and ocean current pool, and hydrodynamic force and structural response of the anchor system multi-floating-body array system under the steady-state ocean current and regular wave conditions is evaluated; the system studies the influence of the size of the floating ball, the weight of the mooring chain and the flow velocity on the hydrodynamic performance and the platform stability. And the performance requirements in a complex marine environment can be better met.

The invention relates to an impact-absorbing structure (2) for use in a motor vehicle, preferably for use in a longitudinal beam of a motor vehicle, having a deformation body (4) which extends along a deformation axis (X) and is deformable along the deformation axis (X) for absorbing impact forces and has a length (L) and a material thickness (D), a first and a second opening (6a, 6b) with a height (H) and a width (B), which are arranged on the deformation body (4) on the end side, the deformation body (4) being formed as a cast component from a metallic material and having a regular wave-shaped outer contour formed along the length (L) thereof.

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 application relates to a wave impact process simulation system and method for a straight wall structure, wherein a collecting device is arranged to acquire wave height data of water flow fluctuation and pressure data at a plurality of sampling points on a straight wall type building in real time, a simulation device is arranged to utilize the wave height data and the pressure data obtained by the collecting device, and a smooth particle fluid hydrodynamic simulation algorithm is used to obtain pressure information at different heights of the straight wall type building when regular waves impact the straight wall type building. The smooth particle fluid hydrodynamic simulation algorithm can verify the numerical model of the motion characteristics of the regular waves and perform numerical simulation of the wave impact on the straight wall type building, and can also calculate the wave face lifting duration curve in front of the slope and on the slope and the pressure values at different heights of the straight wall type building when the regular waves impact, so that the simulation effect is effective.

The invention relates to the technical field of wave making, in particular to a wave making method based on an underwater flat plate longitudinal pushing type wave maker. Wave surface equations of different wave surface positions are constructed according to the obtained geometric parameters of the wave maker and the motion parameters of the underwater flat plate; according to the input target wave parameter, determining the wave number of the target wave and the underwater flat plate amplitude required for generating the target wave; if the target wave is a regular wave, controlling an underwater flat plate to longitudinally move according to a simple harmonic motion rule according to the flat plate amplitude; and if the target wave is an irregular wave containing N angular frequency components, introducing a random phase, and driving the underwater flat plate to perform multi-frequency synthetic vibration according to the flat plate amplitude corresponding to each angular frequency component. According to the method, the wave surface equation of vertical movement of the two-dimensional underwater flat plate structure is derived based on the potential flow theory, and the transfer function is obtained by using the equation, so that accurate generation of regular waves and irregular waves can be realized through the underwater flat plate.

The application provides a flow field reconstruction and deduction method based on K-A theorem, and belongs to the technical field of ship hydrodynamics. First, multi-dimensional data such as the direction, amplitude, period, frequency and flow velocity of irregular waves are collected and integrated into high-dimensional wave vectors. Then, the KAN network with B-spline curve as a learnable function is used to map the high-dimensional input into a low-dimensional parameter list, obtain the amplitude, angular frequency and initial phase of the dominant equivalent regular wave, calculate the decoupling target function by constructing an equivalent wave superposition model, compare the decoupling target function with the true value to obtain a loss function, and then optimize the network parameters by backward propagation until convergence. Finally, based on the network output parameters, a wave superposition model is constructed to represent the real wave in the form of a series of interpretable regular waves superimposed in time sequence, so that efficient and accurate flow field reconstruction and deduction are realized.

The invention discloses a floating type fan integrated coupling simulation method and system under the typhoon sea condition. The method comprises the steps that a Holland theoretical model wind field and an ECMWF sea surface wind field are adopted to be overlapped to construct a mixed wind field; a typhoon wave model is established by taking the mixed wind field as an input wind field of the SWAN model and combining actual measurement topographic data of the global topographic data set, so that typhoon wave spectrums in different time periods of the typhoon landing process are obtained; according to the typhoon sea wave spectrum, generating a typhoon sea wave time sequence by utilizing irregular wave linear theory superposition; simulating a three-dimensional time-domain turbulent wind field according to the maximum wind speeds of different time periods in the typhoon landing process; and inputting the turbulent wind field, the typhoon sea wave time sequence and the hydrodynamic coefficient into OpenFAST software, setting a simulation working condition to carry out wind and wave coupling integrated simulation, and obtaining structural response and motion response time history data. The method has the advantages of improving the calculation precision and efficiency of the floating type wind power load and the like.

The present application belongs to the field of ship hydrodynamics and motion prediction, and in particular to a device and method for predicting the hydrodynamics and motion of a ship coupled with ice, which first derives a Green function that satisfies the boundary conditions of the ice layer and the free surface, as well as all other conditions except the surface condition of the ship, and through the Green function, the differential equation of the velocity potential is converted into a boundary integral equation on the surface of the ship only, which introduces an extended surface at the waterline of the ship body to eliminate the influence of irregular wave frequencies; an asymptotic solution formula of the Green function is analytically derived, thereby establishing an approximate and effective solution program for the coupled interaction of the ship / wave / ice layer, and numerically calculating the results of the added mass, damping coefficient and wave exciting force of the ship body; through the method, the interaction mechanism of the water wave / ship / ice layer under different parameter characteristics can be deeply understood, and theoretical support is provided for the hydrodynamic problems, motion prediction and rational design of polar ships.

The application provides a regular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the regular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

This invention belongs to the field of surrounding rock pretreatment technology and discloses a construction device based on controlled drilling and blasting to create fixed undulations on the surface of surrounding rock, including the surrounding rock itself. Through the coordination of structures such as a grinding mechanism, grinding roller one is larger than grinding roller two and its position remains unchanged. Regardless of how hydraulic rod two is flipped, grinding roller one can always pre-grind the uneven rock wall, making the recessed parts ground by grinding roller two exhibit more regular waves. A dual-axis motor drives the star disk to rotate and pushes the guide rod and its upper transmission mechanism to extend outward. The middle grinding roller two moves outward and grinds the rock wall into a recess. A tension spring pulls the transmission mechanism and grinding roller two away from the recess. A bidirectional telescopic plate restricts the extension of the lower grinding roller two and grinds the recessed area a second time, making the recessed part more flat and uniform, thereby increasing the effective contact area between the surrounding rock and concrete, providing stronger mechanical interlocking force, and enabling the concrete to more firmly connect the surrounding rock and precast components.

The application provides an irregular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the irregular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The invention relates to a full-wave-direction wave test method and system based on a free self-propelled ship model, and the method comprises the steps: firstly installing a test device on a pre-manufactured free self-propelled ship model, arranging a wave maker in a test pool, and arranging a wave height meter and motion capture equipment around the test pool; setting a parameter range of a regular wave, carrying out comprehensive performance verification on the free self-propelled ship model, then executing a test, and obtaining six-degree-of-freedom motion time calendar data, wave time calendar data and propeller thrust of the free self-propelled ship model at the same time; filtering processing and Fourier transform are carried out to extract motion amplitudes and wave amplitudes of all degrees of freedom of the free self-propelled ship model, and a specific calculation method is adopted to calculate motion response amplitude operators of all degrees of freedom, thrust change values in waves and dimensionless wave resistance increasing coefficients; and finally, based on the motion response amplitude operator of each degree of freedom and the dimensionless wave resistance increasing coefficient, predicting the motion amplitude and the wave load of the ship under different wave directions during actual navigation by combining the wave spectrum data of the target navigation area.

The invention discloses a two-dimensional wave-water flow numerical water tank building method based on an ISPH method and adding a wave absorption area and application, and adopts a method of combining the ISPH method with a sponge layer wave absorption theory and a modified k-epsilon turbulence model to build a wave-water flow combined action two-dimensional numerical water tank model. Accuracy and applicability verification is carried out on the two-dimensional numerical water tank model through the propagation process of waves on the coral reef section, the change of the wave height along the reef and the change hydrodynamic characteristics of the horizontal flow speed, and hydrodynamic characteristic change analysis is carried out after coral reef area composite engineering activities. And / or the method is used for analyzing the influence of breakwater construction on the coral reef terrain hydrodynamic environment under the condition of the regular wave and water flow coupling effect. The simulation result of the numerical model after the k-epsilon turbulence model improved by adopting the wave absorption theory and coupled and corrected is well matched with the experimental result of the physical model, and the problem that the kinetic energy index of turbulence in the potential flow area is increased before the waves are broken is obviously improved compared with that of a traditional method.

The present application relates to the technical field of slamming wave simulation, and specifically discloses a slamming wave simulation method and device based on time difference regulation. The method first determines multiple groups of target regular waves with specific periods and amplitudes, measures the time difference of wave peaks from wave generation to a specified action point for each group of regular waves; then constructs a wave generation formula based on the time difference, directly generates a composite wave in a large wave tank through the wave generation formula, and simultaneously adopts a slow start and slow stop control to avoid wave start / stop distortion, thereby ensuring that the wave peaks of each group of regular waves in the composite wave are superimposed synchronously at the specified action point to form superimposed waves with a slamming effect. The present application is suitable for wave resistance performance testing of large marine engineering structures, and has high simulation accuracy, simple operation and strong repeatability.

The utility model discloses test equipment capable of reproducing a deep sea storm environment, and relates to the technical field of deep sea engineering. Comprising a wind tunnel located above a deepwater experiment pool and used for generating a wind field to simulate atmospheric boundary layer wind; the upper layer of the wind tunnel is provided with a plurality of wind generating devices, and the corners of the wind tunnel are provided with guide plates. The L-shaped wave making equipment is used for generating multidirectional ocean waves to simulate regular waves and irregular waves with different angles, different wave heights and periods; the wave dissipation platform is arranged opposite to the L-shaped wave making equipment and is used for eliminating reflected waves; the floating tank bottom is positioned in the deepwater experiment water tank and is used for simulating different experiment water depths; the trailer system is installed on the surface of the upper portion of the deepwater experiment pool and used for fixing or dragging an experiment model and installing an experiment measuring instrument. According to the utility model, the atmospheric boundary layer wind tunnel is combined with the deep pool, so that synchronous laboratory reproduction of sea waves and sea wind can be realized, and the effect of the ocean engineering structure can be accurately simulated.

The invention discloses an offshore floating wind turbine dynamic response prediction method considering an unsteady effect, and the method comprises the following steps: a) obtaining related parameters of a floating wind turbine; b) determining analysis parameters of forced vibration of the wind turbine blade and the wind speed of the sea area where the wind turbine blade is located according to the related parameters of the wind turbine blade; c) determining analysis parameters of forced vibration of the floating platform and the ocean current velocity of the sea area where the floating platform is located according to the related parameters of the floating platform; d) establishing a reduced wind speed, a reduced ocean current speed and an unsteady pneumatic-hydrodynamic load model of the floating wind turbine under the influence of the analysis parameters; and e) analyzing and predicting the dynamic response of the floating wind turbine under the combined action of wind-regular wave / irregular wave-ocean current by adopting an unsteady pneumatic-hydrodynamic load model. According to the floating wind turbine dynamic response prediction method considering the unsteady effect, the influence of the reduced wind speed, the reduced ocean current speed and the forced vibration frequency on the pneumatic-hydrodynamic load coefficient is analyzed, and the prediction precision of the fluid load and the dynamic response is improved. The method generally improves the precision of pneumatic-hydrodynamic load prediction of the floating wind turbine under the combined action of wind-wave-ocean current, improves the applicability from the source, improves the accuracy of load evaluation and analysis of the wind turbine, enables the coupling dynamic response of the floating offshore wind turbine to be accurately predicted, and improves the reliability of the floating offshore wind turbine. And the operation safety performance, economic benefit and energy utilization rate of the wind turbine are improved.

The application discloses a two-dimensional wave-current numerical flume construction method based on an ISPH method and addition of a wave absorbing area and application. k-ε The method combines the ISPH method, the "sponge layer" wave absorbing theory and a modified k-ε turbulence model to construct a two-dimensional numerical flume model of wave-current interaction, and verifies the accuracy and applicability of the two-dimensional numerical flume model through the wave propagation process on the coral reef profile, the wave height change along the reef and the variation of the hydrodynamic characteristics of the horizontal flow velocity, and is used for analyzing the change of the hydrodynamic characteristics of the coral reef area after composite engineering activities, and / or used for analyzing the influence of the construction of a breakwater on the hydrodynamic environment of the coral reef topography under the condition of the coupling action of regular waves and water flow. The simulation result of the numerical model after the wave absorbing theory is improved and coupled with the modified k-ε turbulence model is in good agreement with the experimental result of the physical model, and the problem of the exponential growth of the turbulence kinetic energy index in the potential flow area before wave breaking is obviously improved compared with traditional methods.

This invention provides a method for predicting linear wave loads in ship structural design, relating to the field of ship engineering structural design technology. Based on optimized Latin hypercube sampling and three-dimensional potential flow calculation, this invention constructs a dataset of hydrodynamic pressure fields and load components under regular wave conditions. It extracts the basis function system and establishes a linear mapping relationship between the combination coefficients and the loads. For irregular wave sea states, it interpolates to determine the state transition matrix and control matrix. Combined with the main wave disturbance force, it performs a time-series recursion of the combination coefficients, triggering local transient calculations at preset intervals, and performing sparse verification corrections on the recursive state. Finally, it outputs the load history in real time through the mapping relationship and statistically analyzes the extreme values ​​to generate a wave load design parameter table. This method replaces full-order solutions with low-dimensional recursion, triggering a small number of full-order verifications at preset intervals. While maintaining prediction accuracy comparable to full-order solutions, it significantly reduces computation time, providing efficient and reliable load input for ship structural design.

The invention discloses an unsteady numerical method and system for simulating the hydrodynamic interaction of two ships in a wave environment, and the method comprises the steps: setting a computational domain and boundary conditions with the average value of the lengths of the two ships as the characteristic length through selecting the scale models of a pursued ship and a pursued ship; carrying out local encryption grid division on the curvature change area of the ship body by adopting an overlapping dynamic grid technology; a first-order VOF wave module is used for generating regular waves, and the water-gas two-phase volume fraction, pressure and speed initial conditions are configured through an Euler multiphase model; a translational motion is set for a chasing ship, an overlapped dynamic grid area is specified to follow up, six-degree-of-freedom body model parameters are configured for a chased ship, and an unsteady RANS equation and a turbulence model are solved by adopting an implicit unsteady solver. According to the invention, the transient change of the flow field can be captured in real time, the nonlinear characteristics of waves and the complex relative movement of two ships are accurately simulated, and a high-precision numerical analysis means is provided for ship navigation safety assessment and performance optimization.

The invention relates to the technical field of slamming wave simulation, and particularly discloses a slamming wave simulation method and device based on time difference regulation and control. The method comprises the following steps: firstly, determining a plurality of groups of target regular waves with specific periods and amplitudes, and measuring the wave crest arrival time difference of each group of regular waves from wave making start to a specified action point; a wave making formula is constructed based on the time difference, synthetic waves are directly generated in a large wave water tank through the wave making formula, meanwhile, slow-start and slow-stop control is adopted to avoid wave start / stop distortion, it is ensured that wave crests of all groups of regular waves in the synthetic waves are synchronously superposed at a specified action point, and superposed waves with the slamming effect are formed. The device is suitable for wave resistance testing of large ocean engineering structures and is high in simulation precision, easy and convenient to operate and high in repeatability.

The application discloses a method for evaluating ship riding wave probability in irregular waves based on AIS data, which comprises the following steps: 1, establishing a probability density function of ship density based on ship AIS data; 2, selecting a representative route and multiple test points at equal intervals, and obtaining the probability of occurrence of a specific random sea state in a target sea area according to a wave scatter diagram of a sea area near the test points; 3, calculating the riding wave probability of a ship in random waves; 4, calculating the riding wave probability of a ship in a specific irregular wave of a test point of the representative route in random waves; 5, calculating the riding wave probability of the ship under each random sea state of the test point, and calculating the riding wave probability of the ship of other test points according to the same steps. The application solves the related problem of solving the riding wave motion of a ship in irregular waves, can predict the probability of the riding wave motion of the ship in irregular waves, the calculation result can directly obtain the riding wave motion probability of the ship in irregular waves, the solving precision is high, the efficiency is high, and the application is suitable for various ship types.

The utility model discloses a dynamic and static torsion test system, which is applied to the field of component strength performance test and detection, and comprises a base, the top of the base is bolted with a torsion actuator, and the output end of the torsion actuator is fixedly connected with a coupler; according to the electro-hydraulic servo closed-loop control principle and the hydrostatic bearing technology adopted by the torsion actuator, the electro-hydraulic servo torsion actuator has the characteristics of high response speed, high precision, wide frequency band, multiple waveform types and the like, can perform torque and torsion angle control tests, is stable and reliable in work, can apply regular waveform and arbitrary waveform tests to a test piece, can switch the torque state and the torsion angle state at will, and is suitable for large-scale popularization and application. According to the utility model, the adapter is arranged on the fixture, and different adapters are matched according to the interface sizes of different parts and different parts, so that the whole fixture does not need to be replaced, the maintenance cost of the fixture is reduced, the proper fixture can be quickly switched, and the applicability is improved.

The invention discloses a weibull shape parameter calculation method in ship fatigue strength checking, and relates to the technical field of ships, the method comprises the following steps: calculating a wave load of a ship under regular waves through hydrodynamic analysis, applying the wave load to a ship body structure finite element model, and obtaining a stress response transfer function through structure finite element calculation; stress response short-term distribution is calculated in combination with the sea wave statistical condition of a target navigation sea area of the ship, and stress response long-term distribution is obtained through further weighted combination, so that stress amplitude long-term forecast values under different exceeding probabilities are obtained and used for calculating weibull shape parameters at typical check nodes of the ship; the weibull shape parameters obtained through calculation have a good matching relation with the ship structure, the sea wave condition of the target navigation sea area and the checking position, accuracy and precision are high, a basis is provided for follow-up high-precision ship structure fatigue strength checking, and the ship structure fatigue life forecasting precision can be improved.

The invention provides a flow field reconstruction and deduction method based on the K-A theorem.The method belongs to the technical field of ship hydrodynamics, and comprises the steps that firstly, multi-dimensional data such as the direction, the amplitude, the period, the frequency and the flow speed of irregular waves are collected and integrated into a high-dimensional wave vector, and then a KAN with a B spline curve as a learnable function is used for obtaining a high-dimensional wave vector; high-dimensional input is mapped into a low-dimensional parameter list, the amplitude, the angular frequency and the initial phase of dominant equivalent regular waves are obtained, a loss function is obtained by constructing an equivalent wave superposition model, calculating a decoupling objective function and comparing the decoupling objective function with a true value, then network parameters are optimized through back propagation until convergence, and finally, the optimal network parameters are obtained. A wave superposition model is constructed based on network output parameters, real waves are represented in the form that a series of interpretable regular waves are superposed on a time sequence, and efficient and accurate flow field reconstruction and deduction are achieved.

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

The invention relates to the technical field of wave dissipation engineering, in particular to a wave dissipation facility, a wave dissipation facility system, a wave dissipation dam and a wave dissipation dam system.The wave dissipation facility comprises at least three first wave dissipation structures arranged at intervals, and at least two first wave dissipation structures form a multi-bend water flow channel. According to the wave dissipation facility, the advancing path of waves can be changed, the advancing path of the waves is changed into a multi-bend path, regular waves are converted into vortexes, reflected water flow and turbulent flow through the arrangement of the multi-bend path, then the purpose of reducing the height of the waves is achieved, meanwhile, due to the fact that the waves can reach the other side of the wave dissipation facility through the multi-bend path, the wave dissipation efficiency is improved, and the service life of the wave dissipation facility is prolonged. Therefore, the permeable rate of the two sides of the wave dissipation facility can be effectively guaranteed, the purpose of water permeation and no wave permeation is achieved, and the influence on the marine ecological environment is greatly reduced.

The application discloses a kind of floating platform fatigue damage evaluation method and device, to solve the technical problem that the fatigue damage of the existing floating platform fatigue damage evaluation method is difficult to realize comprehensive evaluation of floating platform fatigue damage by arranging a limited number of sensors.Method includes establishing floating platform finite element model and obtaining wave scatter diagram, by discrete long-term sea state determine the corresponding short-term working condition of each local structure;Subsequently, combined with preset regular wave, loading condition and other data, hot spot analysis method is used to identify each fatigue hot spot;Then using time domain finite element and machine learning constructs hot spot stress prediction model;Finally, based on rainflow counting method and stress-life curve, the fatigue damage result of each fatigue hot spot is generated.