621 results about "Floating wind turbine" patented technology

The invention provides an offshore floating type fan foundation fatigue analysis method, electronic equipment and a medium, a stress superposition-based multi-load fatigue analysis method is established, and linear superposition is performed on a time sequence tower bottom load response, a time sequence mooring response and a time sequence wave response under the same working condition to obtain a stress time calendar curve under the corresponding working condition; carrying out rain flow counting on the stress time calendar curve, and combining an S-N curve to obtain the total fatigue damage of the working condition; and performing weighted calculation on the total fatigue damage of all working conditions in the target service time of the fan foundation to obtain full-working-condition fatigue damage. According to the method, the influence of each load is fully considered on the overall scale, different loads of the same working condition are matched, the method is suitable for various complex wind and wave coupling conditions, stress time sequences of different loads are superposed and subjected to fatigue treatment, the full-working-condition fatigue damage of the fan foundation under multiple load components is obtained, and the precision of fatigue damage analysis is improved.

The invention relates to the technical field of safety monitoring of floating structures, and provides a safety early warning method and system for a floating wind turbine, and the method comprises the steps: obtaining multi-modal data at historical moments, and predicting the response data of the wind turbine at the current moment through a deep neural network model; obtaining deterministic environment parameters, and calculating wind turbine response data at the current moment through the wind turbine numerical model; calculating the difference between the prediction result and the monitoring result and the difference between the calculation result and the monitoring result, and taking the weighted sum of the two differences as a weighted error; respectively carrying out statistical analysis on the prediction result, the calculation result and the monitoring result; recording the difference value between the statistical value of the calculation result and the statistical value of the monitoring result as a first difference value; recording the difference value between the statistical value of the prediction result and the statistical value of the monitoring result as a second difference value; and carrying out grading early warning on the wind turbine. The abnormal information of the wind turbine system can be comprehensively identified, and the state of the wind turbine can be timely mastered and intelligently evaluated.

The invention discloses a model prediction variable-pitch control method, device and equipment for a floating type wind turbine generator, and relates to the technical field of wind turbine generator control, the whole model prediction variable-pitch control fully considers the characteristics of the floating type wind turbine generator, stabilizes the attitude of the generator while stabilizing the power, and improves the control accuracy of the floating type wind turbine generator. And the adaptability and the stability of the whole control process are improved. The method comprises the following steps: reading unit state data of a floating wind turbine generator under multiple working conditions, and constructing a nonlinear model under the working conditions by adopting the unit state data; constructing a linear variable parameter model corresponding to each nonlinear model by adopting the plurality of unit state data, calculating a plurality of gap values of the plurality of linear variable parameter models, and establishing a model library based on the plurality of gap values and a gap standard; determining a state-space equation according to the current wind speed and the model library, and constructing a model prediction controller based on the state-space equation; and calculating an optimal control sequence by adopting a model prediction controller, and controlling the floating wind turbine generator based on the optimal control sequence.

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

The invention discloses a buoy structure and a foundation structure suitable for a floating type wind turbine generator foundation, and the buoy structure comprises a distributed steel pipe frame which comprises a central steel pipe and peripheral steel pipes arranged around the central steel pipe; the end deck comprises an upper end deck and a lower end deck which are connected with the two ends of the distributed steel pipe frame respectively; the buoyancy module is made of glass fiber reinforced plastics and is formed by connecting a plurality of buoyancy units with a central steel pipe and a peripheral steel pipe in a layered manner, and each buoyancy unit is of a hollow watertight box body structure and is filled with a water pressure load or a solid pressure load; each buoyancy unit comprises a connecting pin connected with the central steel pipe, a through hole allowing the peripheral steel pipe to penetrate through and a skirt plate used for being connected with the adjacent buoyancy unit or the end deck, the connecting pins are arranged on the inner sides of the buoyancy units, the skirt plates are arranged on the outer sides of the buoyancy units, and connecting holes are formed in the skirt plates. The manufacturing and maintenance cost is effectively reduced, meanwhile, modular construction can be achieved, and the construction period is greatly shortened.

Disclosed is a method for controlling a floating wind turbine system. The floating wind turbine system comprises a floating platform, a tower mounted to the floating platform and a nacelle. The method comprises receiving, from one or more sensors of the floating wind turbine system, a signal indicative of a vertical acceleration of the floating wind turbine system. The method comprises determining, based on the received signal, a sea state parameter indicative of an oscillation of the vertical acceleration. The method comprises controlling the floating wind turbine system based on the sea state parameter.

The invention discloses a six-degree-of-freedom pneumatic load simulation system of an offshore floating type fan and a control method, and belongs to the field of offshore wind power generation technologies and fan test equipment. The simulation system comprises a wave flow simulation device installed at the forefront of a wave pool, a floating platform fixed in the middle of the wave pool through a mooring anchor chain, a tower installed on the floating platform, a cabin installed at the top of the tower, a six-degree-of-freedom load sensor installed between the cabin and the tower, and a fixed support installed at the right front of the cabin. A plurality of groups of variable-speed fans are mounted on the fixed bracket and are connected with the controller through a brushless electronic speed regulator mounted in the cabin; a crane is installed on the upper portion of the wave pool, a data acquisition box, a visual camera and an upper computer are installed on the top of the crane, the visual camera is connected with the data acquisition box through a synchronous triggering device, and the data acquisition box is connected with the upper computer. According to the method, the high-precision six-degree-of-freedom pneumatic load can be generated, and the dynamic performance of the marine floating type fan can be accurately evaluated.

Disclosed is a floating platform integrating wave attenuation with marine energy power generation and a working method thereof, the platform includes a breakwater, a tuned damping wave energy converter, and an offshore floating wind turbine. The breakwater includes double-cylindrical-boxes and connecting bulkheads, and a moon pool area is formed in a middle of the breakwater; the offshore floating wind turbine and the tuned damping wave energy converter are both connected to the breakwater through a connecting rod. A circular groove is formed on an inner side of each of the connecting bulkheads of the breakwater. The breakwater provides the floating base and power generation environment for the offshore floating wind turbine and the tuned damping wave energy converter, and a plurality of the tuned damping wave energy converters can be disposed, and are evenly distributed beneath the offshore floating wind turbine.

The invention discloses a tuning heave plate semi-submersible platform containing an inerter and a structural parameter optimization design method of the tuning heave plate semi-submersible platform, and belongs to the field of floating wind turbine platform vibration suppression. Comprising a semi-submersible platform, a stand column, a spring-damping-inerter structure and a heaving plate. The heaving plate and the semi-submersible platform are oppositely installed in an up-down parallel mode through the stand column and the spring-damping-inerter structure, the upper end of the stand column is fixedly connected with the bottom of the semi-submersible platform, the lower end of the stand column is fixedly connected with the upper end of the spring-damping-inerter structure, and the lower end of the spring-damping-inerter structure is fixedly connected with the heaving plate. The heaving plate can move up and down relative to the semi-submersible platform through a spring-damping-inerter structure. The semi-submersible type wind turbine platform has the advantages of being high in bearing capacity and good in heaving restraining effect, unsteady heaving borne by the semi-submersible type wind turbine platform in different sea conditions can be reduced, and therefore the service life and performance of the semi-submersible type wind turbine platform are guaranteed.

The invention provides a strong nonlinear simulation method and device suitable for a large floating fan, and the method comprises the steps: dividing a target floating fan into a plurality of body structures according to the model parameters of the target floating fan, so as to construct a multi-body model containing a plurality of degrees of freedom, and building a whole machine load and a motion transmission path; the aerodynamic load input of each body structure is calculated, and the nonlinear dynamic response of the blade is calculated according to the aerodynamic load input of each body structure; according to the coordinate transformation relation, the nonlinear dynamic response of the blade is converted into a whole coordinate system and input into a multi-body dynamic model of the whole machine, generalized active force and generalized inertia force of each body structure in the target floating type draught fan are obtained through calculation, and the motion response of each body structure of the target floating type draught fan is obtained through simultaneous solution. According to the scheme, the motion response of each body structure of the target floating fan can be accurately determined, so that the running state of the floating fan in the deep and far sea complex environment can be accurately evaluated.

The invention relates to the technical field of floating type wind turbine generator operation, and discloses an evaluation method and device for coupling response characteristics of offshore wind regimes and floating type draught fans, and the method comprises the steps: obtaining sea area meteorological observation data corresponding to a target floating type draught fan, and calculating offshore wind regime data based on the sea area meteorological observation data corresponding to the target floating type draught fan; wherein the offshore wind regime data comprises a sea level roughness coefficient and a vertical wind shear coefficient, obtaining a target floating fan equipment parameter, constructing a floating fan simulation model based on the target floating fan equipment parameter, and finally performing coupling response characteristic evaluation by using the floating fan simulation model based on the offshore wind regime data. And obtaining an evaluation value of the coupling response characteristics of the offshore wind regime and the floating fan. According to the method, the response characteristics of the floating fan under the influence of the offshore wind condition are effectively evaluated, and a data basis is provided for ensuring the safe operation of the floating fan.

The invention discloses a calculation method of a fan blade tip gap accelerated flow analytical model, and belongs to the technical field of fan speed field calculation. By analyzing the aerodynamic characteristics of a fan wake flow gap acceleration area, the correlation between the power increase of the side-by-side fan and the fan wake flow gap acceleration area is disclosed, and an analytical model is constructed according to the self-similarity of the gap acceleration area and an eddy current equation. According to the model, local accelerated flow caused by rotation of adjacent rotor blade tips under the same plane is considered, by adopting the method, the used model has high precision in the aspect of predicting the flow field characteristics of the blade tip wake flow gap acceleration area, the prediction effect is close to that of a high-fidelity numerical simulation method, but the calculation cost is far lower than that of traditional CFD simulation; the method is well applicable to processing and simulating wind power plant structures which are closely arranged along the y-z same plane, such as a double-head floating fan and a fan wall, and shows good engineering application value.

The invention discloses a floating fan pool test model blade optimization design method and device based on an NSGA-III algorithm, a medium and a program. The method comprises the steps that firstly, the aerodynamic coefficient of a real fan blade airfoil and the Reynolds number of a floating fan model blade are calculated; selecting an appropriate low-Reynolds-number fan blade airfoil to replace a model blade airfoil and calculating an aerodynamic coefficient; calculating a target thrust value and a torque value of the floating fan model under different test required wind speeds; performing linear fitting to obtain a linear function of a lift coefficient linear region of the real type and the model blade relative to the attack angle; calculating the final chord length of the model blade; and finally, on the basis of an NSGA-III algorithm, the rotor rotating speed and the blade pitch angle of the floating fan model at different wind speeds are optimized by taking the minimum relative error of the thrust and the torque as a target. According to the invention, the thrust and torque of the model fan are matched with the target thrust and torque under different wind speed scales, the test accuracy is improved, and resources are saved.

The invention relates to the field of ocean energy development, and discloses a floating fan anchor chain optimization method and device based on a genetic algorithm and a medium, and the method comprises the steps: obtaining the installation data of a floating fan system; based on the installation data of the floating fan system, a full-coupling numerical model of the mooring system is established by adopting CFD software; a genetic algorithm is adopted to optimize the full-coupling numerical model, and mooring optimization parameters are obtained; the mooring optimization parameters are applied to actual installation of the floating type draught fan system; according to the method, the high-precision full-coupling numerical model is established through the advanced CFD technology, the performance of the floating fan system in the complex marine environment is comprehensively and accurately predicted and evaluated, meanwhile, the mooring system is optimized through the genetic algorithm, the optimal parameter combination is found, the stability and reliability of the system are greatly improved, and the method is suitable for popularization and application. Powerful support is provided for application and development of the floating fan technology under deep sea and severe sea conditions, and remarkable beneficial effects are achieved.

The invention discloses a marine gangway ladder preset time autonomous lap joint control system and a working method thereof. The system comprises an inertial measurement unit and a main control computer; the binocular camera is adopted, multi-sensor fusion is not needed, accurate lap joint point position information is directly obtained, and the method is simple and easy to implement; according to the provided preset-time autonomous lap joint control method, the system adjusting time can be set in advance, and operation and maintenance ship movement caused by waves is efficiently compensated by driving the swing mechanism, the pitching mechanism and the telescopic mechanism to cooperatively move, so that the front end of the offshore gangway ladder accurately follows the expected position of an upper lap joint point in time; the offshore accommodation ladder is lapped to the offshore wind turbine platform within the set lapping time, so that efficient and autonomous lapping of the offshore accommodation ladder and the offshore fixed or floating wind turbine platform is ensured, and the lapping efficiency is improved; the front end of the offshore gangway ladder is in non-contact lap joint with the lap joint point of the offshore wind turbine platform, no special requirement for the lap joint point exists, a landing device does not need to be built, and the maintenance and manufacturing cost of the gangway ladder is reduced.

A gravity type variable-length seabed single-point mooring connecting device of a floating fan comprises a floating body with at least two pulley fairlead devices, a single-point anchor arranged on the seabed and connected with a rotatable device, and at least one weight located in water below the floating body. Wherein the heavy block is connected with the single-point anchor through a mooring rope passing through the pulley fair lead. The offshore mooring system is small in seabed coverage area, environment-friendly, high in mooring system efficiency, safer, more reliable, practical and feasible, has a wind indicator function, and can be used for offshore mooring positioning of the floating type wind power platform with the water depth ranging from 50 m to 300 m or even larger than 1500 m.

A method of damping motion of a wind turbine, the wind turbine comprising a rotor and a floating platform. A motion signal is generated which is indicative of a motion of the wind turbine. A wind direction signal is generated which is indicative of a wind direction relative to the floating platform. A damping signal is generated on the basis of the motion signal and the wind direction signal, and the motion of the wind turbine is damped on the basis of the damping signal, for instance by adjusting the pitch of the rotor blades. A phase of the damping signal may be controlled on the basis of the wind direction signal.

The invention relates to the technical field of wind power generation, and discloses a variable-pitch control method, device, equipment and product for a floating type wind turbine generator. A wind turbine generator model is constructed by comprehensively considering multiple factors such as aerodynamics, hydrodynamics and mooring dynamics, and a gain scheduling control model is introduced into a preset PI control method; the method can adapt to different working conditions, effectively overcomes the limitation of the traditional PID control in the complex dynamic environment of the floating wind turbine generator, reduces the power fluctuation, and reduces the structure resonance risk. A preset platform pitching value is introduced into expert PID control, and Kohmann coordinate transformation is combined, so that the negative damping problem of a unified variable-pitch floating type fan is solved, and accurate distribution of control signals is realized. And finally, through the control combination of unified variable pitch and independent variable pitch, the pitching amplitude is reduced, the blade load is reduced, the stability and safety of the floating type wind turbine generator are remarkably improved, and reliable operation of the generator is guaranteed.

The invention discloses a wind tunnel-pool combined loading floating fan distributed hybrid test method, which comprises the following steps of: establishing a floating fan multi-body / multi-physical field collaborative reduced scale criterion, dividing a floating fan into two independent physical models and two independent numerical models, and placing the two independent physical models and the two independent numerical models in different laboratories; integrating a physical model, a numerical model, a loading system and a measurement system, and building a floating fan physical-numerical distributed hybrid test platform; and carrying out data interaction and closed-loop control on the physical-numerical hybrid test platform. A fan and a floating platform are adopted as two relatively independent test substructures, test loading or computer simulation can be carried out in different laboratories by establishing different similarity criteria and geometric scale ratios, a collaborative online test and pneumatic-hydrodynamic load loading under the coupling action of wind, waves and flow are carried out through network interaction data, and the test efficiency is improved. The technical problems of environment load high-precision simulation and dynamic coupling response in a reduced scale model test are solved.

The invention discloses an integrated modeling method and system for a floating type fan and a medium. An integrated modeling method for a floating type draught fan comprises the steps that an initial model of the floating type draught fan is obtained, and the floating type draught fan comprises an upper draught fan system, a tower, a floating type platform and a mooring system; and converting the initial model of the floating type fan into an integrated model of the floating type fan, including: converting the initial model coordinates of the upper fan system into the coordinate system of the tower to form a model of the upper fan system part in the integrated model; converting the initial model coordinates of the floating platform to a coordinate system of the tower to form a model of the floating platform portion in the integrated model; transforming initial model coordinates of the mooring system to a coordinate system of the tower to form a model of the mooring system portion in the integrated model; and constructing an integrated model based on the converted models of the upper fan system part, the floating platform part and the mooring system part and the initial model of the tower.

The invention relates to the technical field of offshore wind power generation, in particular to a semi-submersible floating fan foundation, a system and a design method. The semi-submersible floating fan foundation comprises a middle buoy and at least three side buoys arranged around the middle buoy, bases are poured at the bottoms of the side buoys, and prestressed concrete box girders are connected between the adjacent side buoys. The semi-submersible type floating fan foundation provided by the invention can be used for bearing an offshore fan, and the effective displacement of the fan foundation can be greatly improved by adopting a form of combining the floating barrels and the box girders, so that the fan foundation has higher bearing capacity; the box girders are prestressed concrete box girders, so that the higher structural strength and rigidity and excellent crack resistance and durability of the prestressed concrete box girders can be utilized to save part of steel bar and concrete cost under the condition of meeting the bearing requirement and the stability requirement of the offshore wind turbine, thereby being beneficial to improving the overall economic benefit of offshore wind turbine engineering; and large-scale commercial use of the offshore wind turbine can be realized.

The utility model provides a free surface enhancement type shaking liquid damper for vibration reduction of a floating type wind driven generator, which comprises a damper cavity which is a closed cavity and is filled with liquid; the solid particles are used for enhancing the surface of the liquid so as to inhibit the breaking phenomenon of the liquid during large-amplitude shaking, the solid particles float on the surface of the liquid, and the density of the solid particles is smaller than that of the liquid. The free surface of liquid can be enhanced, and then the damping performance is improved.

A ballast device includes guide rails (21, 22) arranged inside a floating platform (1) and along the circumferential direction of the floating platform; ballast blocks (31,32) moving along the guide raisl to adjust the position of gravity center of the floating platform. By arranging guide rails in the floating platform and ballast blocks moving along the guide rails, the distribution of the gravity center of the floating platform is changed, and the shaking of the platform is reduced, thus improving the stability of the fan, reducing the flutter of blades, prolonging the service life of the fan and increasing the power generation. A floating wind turbine and a control method for the ballast device is also provided.

The invention relates to an electric power system for deep sea aquaculture. A floating type wind turbine generator set, a photovoltaic generator set and an aquaculture box are all arranged on a floating body structure, and the floating type wind turbine generator set and the photovoltaic generator set are both connected with an external power grid through submarine cables; the floating wind turbine generator and the photovoltaic generator set are both used for generating electric energy and transmitting the electric energy to an external power grid and to the energy storage module; the energy storage module is used for storing electric energy generated by the floating type wind turbine generator set and the photovoltaic generator set; and the control module is used for controlling at least one of the floating type wind turbine generator, the photovoltaic generator set, the external power grid and the energy storage module to supply power to the aquaculture box according to the operation states of the floating type wind turbine generator, the photovoltaic generator set and the submarine cable. According to the invention, aquaculture can be carried out while power generation is carried out in the deep sea, so that a multifunctional power system can be realized, and real-time power supply can be carried out on the aquaculture box.

The invention discloses a floating fan numerical simulation method based on a cross-scale typhoon modeling algorithm, and aims to solve the problems that a typhoon unsteady-state wind field cannot be accurately simulated and the influence of the typhoon unsteady-state wind field on the coupling dynamic response of a floating fan cannot be accurately simulated in the prior art. The method comprises the following steps: firstly, dividing the whole typhoon process into a plurality of typical stages according to meteorological characteristics; for each stage, calculating a time-varying average wind field by adopting a parameterized mesoscale typhoon model, and embedding a three-dimensional turbulence component generated based on a microscale turbulence model to generate a high-fidelity stage wind field file; integrating the wind fields of all stages into a complete and continuous unsteady typhoon wind field input file by using a splicing algorithm; and finally, inputting the wind field file into a pneumatic-hydrodynamic-servo-elastic coupling simulation platform OpenFAST, and carrying out full-coupling dynamic response analysis on the floating fan. According to the method, the prediction precision of the load and motion response of the floating fan system under the extreme typhoon working condition is improved, and a reliable method is provided for typhoon resistance design and safety evaluation of the floating fan.

The invention discloses a floating type fan motion monitoring system and method based on environment prediction and correction, and belongs to the technical field of offshore floating type wind power. The system predicts and corrects monitoring data of an internal environment sensor of a wind power plant and monitoring data of a sensor of a peripheral floating type fan through transmission and superposition of waves; and sensorless motion monitoring of the floating fan in the wind power plant is realized. The device and the method can effectively reduce the use of a wind power plant motion monitoring sensor and reduce the equipment cost.

The invention discloses a floating fan aerodynamic load real-time mixing test method and system based on AI enhancement, and the method comprises the steps: calculating the six-degree-of-freedom motion information of a floating foundation through a numerical calculation model based on a real-time floating foundation kinetic equation; the method comprises the following steps: carrying a reduced-scale fan model on a six-degree-of-freedom motion platform, placing the six-degree-of-freedom motion platform on a wind tunnel atmospheric boundary layer, controlling the six-degree-of-freedom motion platform based on floating foundation six-degree-of-freedom motion information, driving the reduced-scale fan model to move, generating an aerodynamic load in a simulated wind environment, measuring an original load signal, and correcting the original load signal. Synchronously recording the actual pose of the six-degree-of-freedom platform; and AI correction is carried out on the corrected load signal and the actual pose of the six-degree-of-freedom platform to obtain a net aerodynamic load, the net aerodynamic load is fed back to the numerical calculation model, and closed-loop updating is carried out to realize coupling circulation. According to the method, the problem of interaction between numerical values and physical boundaries is solved, and the test precision of the large floating fan under the complex environment load can be remarkably improved.

The invention relates to the technical field of wind power generation, in particular to a floating type wind power generation foundation and a floating type wind power generator. The floating type wind power generation foundation comprises a foundation platform, a mooring assembly, a ballast system and two supporting tower barrels. The foundation platform is connected with the mooring assembly; the ballast system is connected with the foundation platform and used for adjusting the gravity center and buoyancy of the foundation platform; the two supporting tower barrels are connected with the foundation platform at intervals. The floating type wind power generation foundation is applied to a floating type wind power generator, two wind power generator sets can be installed on the floating type wind power generation foundation, and the problems of mechanical manufacturing and machining capacity bottleneck, experimental testing equipment capacity bottleneck, hoisting and transporting equipment capacity bottleneck and the like existing in the development process of ultra-high-power generator sets are effectively solved. By the adoption of the basic structure, the floating type unit can be directly universal with existing mature products, the manufacturing cost of a supply chain is greatly reduced, and meanwhile commercial operation of the floating type unit with high cost performance is better achieved.

The invention discloses an intelligent guarantee control system and method for a floating type wind turbine generator, and the system comprises a mains supply, a diesel generator, a dual-power switch cabinet, a battery cabinet unit, a time relay group, a redundancy module, at least two lubricating pump units, at least two oil supplementing pump units, a light storage unit, a satellite communication system, a switch, and a control system PLC. The mains supply and the diesel generator are electrically connected with the battery cabinet unit through the dual-power switch cabinet, the diesel generator is in communication connection with the switch and the main PLC of the unit, and the optical storage unit, the lubricating pump unit and the main PLC are electrically connected with the battery cabinet unit. The oil supplementing pump unit, the satellite communication system, the switch, the control system PLC and other power taking devices of the unit are electrically connected with the light storage unit through the time relay set, and the time relay set selects the light storage unit or the battery cabinet unit to supply power through the redundancy module. According to the invention, the problems of power supply and unit state information transmission during construction periods of towing, in-place mooring installation, ballast diving and the like of the unit are solved.

The invention discloses a wind power gear box planetary gear train meshing unbalance load prediction method considering basic motion. The method comprises the following steps: 1) constructing a floating platform non-inertial dynamics model; 2) solving the non-inertial dynamic model of the floating platform to obtain tooth surface unbalance loading coefficients under different platform motion frequencies; 3) calculating a tooth surface unbalance loading coefficient considering the platform motion influence; 4) collecting vibration displacement signals of the gear rings by using vibration sensors arranged on the gear rings of the planetary gear train, and extracting vibration displacement characteristics; 5) constructing a mapping equation between the vibration displacement and the tooth surface unbalance loading coefficient; and 6) utilizing a vibration sensor to collect vibration displacement signals of the planetary gear train gear ring of the gearbox of the floating wind turbine generator in real time, extracting real-time vibration displacement characteristics, and inputting the real-time vibration displacement characteristics into the mapping equation between the vibration displacement and the tooth surface unbalance loading coefficient to obtain the tooth surface unbalance loading coefficient for predicting the meshing unbalance loading of the planetary gear train. According to the method, the accuracy of meshing unbalance loading of the planetary gear train of the gearbox of the offshore floating wind turbine generator is improved.