Fan Structure Determination Method and Device

Abstract

The present application relates to a method and device for determining a fan structure. The method includes: obtaining a fan foundation structure model; obtaining marine environmental load data corresponding to at least two environmental loads; jointly loading the marine environmental load data corresponding to the at least two environmental loads into the fan foundation structure model to obtain joint load strain; determining a target fan component in the fan foundation structure model with a steel usage amount lower than a set threshold; simplifying the target fan component to obtain a simplified fan foundation structure model; taking the foundation structure steel usage amount corresponding to the simplified fan foundation structure model as an optimization target and using the joint load strain as a parameter to perform structural optimization on the simplified fan foundation structure model to obtain a target fan structure model. Using this method can obtain a more accurate fan foundation structure model and reduce the steel usage amount of the offshore fan structure.

Description

Technical Field

[0001] This application relates to the technical field of structural data processing, and particularly to a method and device for determining the structure of a wind turbine. Background Art

[0002] Most of the foundation structures of offshore wind turbines are composed of steel members. Since offshore wind turbines are constantly under the action of random loads such as wind and waves during operation. Under the action of these environmental loads, the structural characteristics of the steel structure change continuously, thereby causing fatigue damage to the foundation structure of the wind turbine. According to the actual engineering experience at home and abroad, for the foundation structure of offshore wind turbines, fatigue loads play a controlling role.

[0003] To effectively resist fatigue loads, a relatively conservative structural safety factor is selected in the current design of offshore wind turbine structures, which significantly increases the steel consumption of offshore wind turbine structures. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a method and device for determining the structure of a wind turbine that can...

[0005] A method for determining the structure of a wind turbine, the method comprising: obtaining a foundation structure model of the wind turbine; obtaining marine environmental load data corresponding to at least two environmental loads; jointly loading the marine environmental load data corresponding to the at least two environmental loads into the foundation structure model of the wind turbine to obtain combined load strain based on the strain of the foundation structure model of the wind turbine; determining a target wind turbine component in the foundation structure model of the wind turbine with a steel consumption lower than a set threshold; simplifying the target wind turbine component in the foundation structure model of the wind turbine to obtain a simplified foundation structure model of the wind turbine; taking the foundation structure steel consumption corresponding to the simplified foundation structure model as an optimization target and taking the combined load strain as a parameter, performing structural optimization on the simplified foundation structure model of the wind turbine to obtain a target wind turbine structure model.

[0006] In one of the embodiments, it further comprises: the obtaining of the marine environmental load data corresponding to at least two environmental loads includes: determining the type of environmental load; the type of environmental load includes at least one of gaseous environmental load, liquid environmental load and solid environmental load; determining environmental monitoring devices corresponding to each environmental load based on the type of environmental load; obtaining historical acting forces when a marine environmental object acts on the offshore wind turbine based on the environmental monitoring devices; obtaining the marine environmental load data corresponding to each environmental load based on the historical acting forces.

[0007] In one embodiment, the step of jointly loading the marine environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model to obtain the combined load strain based on the strain of the wind turbine foundation structure model includes: jointly loading the marine environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model; determining the dynamic displacement and dynamic internal force generated by the wind turbine foundation structure model under the combined action of the at least two environmental loads, so as to obtain the combined load strain corresponding to the wind turbine foundation structure model.

[0008] In one embodiment, after taking the steel consumption of the foundation structure corresponding to the simplified wind turbine foundation structure model as the optimization target and the combined load strain as a parameter to perform structural optimization on the simplified wind turbine foundation structure model to obtain the target wind turbine structure model, it further includes: jointly loading the marine environmental load data corresponding to the at least two environmental loads into the target wind turbine structure model; determining the dynamic displacement and dynamic internal force generated by the target wind turbine structure model under the combined action of the at least two environmental loads, so as to obtain the second combined load strain corresponding to the target wind turbine structure model; performing load strain check on the target wind turbine structure model based on the comparison result of the first combined load strain and the second combined load strain; adjusting the target wind turbine structure model based on the load strain check result.

[0009] In one embodiment, the step of simplifying the target wind turbine component in the wind turbine foundation structure model to obtain the simplified wind turbine foundation structure model includes: determining the centroid position corresponding to the target wind turbine component; simplifying the target wind turbine component in the wind turbine foundation structure model to a point at the centroid position, so as to obtain the simplified wind turbine foundation structure model.

[0010] In one embodiment, the step of taking the steel consumption of the foundation structure corresponding to the simplified wind turbine foundation structure model as the optimization target and the first combined load strain as a parameter to perform structural optimization on the simplified wind turbine foundation structure model to obtain the target wind turbine structure model includes: constructing a regression function with the steel consumption of the foundation structure as the dependent variable and the first combined load strain as the independent variable; performing regression analysis based on the constructed regression function, and determining the optimal steel consumption of the foundation structure based on the result of the regression analysis; determining the target wind turbine structure model parameters corresponding to the optimal steel consumption of the foundation structure; adjusting the wind turbine foundation structure model based on the target wind turbine structure model parameters to obtain the target wind turbine structure model.

[0011] In one embodiment, the installation location of the wind turbine is obtained; the size of the installation space area corresponding to the wind turbine installation location is determined according to the marine terrain environment; the target size corresponding to the tower barrel and / or the foundation on the wind turbine is determined based on the size of the installation space area; and the wind turbine foundation structure model is determined based on the target size.

[0012] A wind turbine structure determination device, the device includes: a wind turbine structure acquisition module for acquiring a wind turbine foundation structure model; a load data acquisition module for acquiring marine environment load data corresponding to at least two environmental loads; a load strain calculation module for jointly loading the marine environment load data corresponding to the at least two environmental loads into the wind turbine foundation structure model to obtain a first combined load strain based on the strain of the wind turbine foundation structure model; a wind turbine component determination module for determining a target wind turbine component with a steel usage amount lower than a set threshold in the wind turbine foundation structure model; a wind turbine structure simplification module for simplifying the target wind turbine component to obtain a simplified wind turbine foundation structure model; and a wind turbine structure optimization module for performing structural optimization on the simplified wind turbine foundation structure model with the steel usage amount corresponding to the simplified wind turbine foundation structure model as the optimization target and the first combined load strain as a parameter to obtain a target wind turbine structure model.

[0013] The above wind turbine structure determination method and device acquire marine environment load data corresponding to environmental loads, jointly load the marine environment load data into the wind turbine foundation structure model to obtain a combined load strain based on the strain of the wind turbine foundation structure model, and perform structural optimization on the simplified wind turbine foundation structure model with the steel usage amount of the wind turbine foundation structure as the optimization target and the combined load strain as a parameter to obtain a target wind turbine structure model, which can obtain a more accurate wind turbine foundation structure model and reduce the steel usage amount of the offshore wind turbine structure. Description of the Drawings

[0014] Figure 1 It is an application environment diagram of the wind turbine structure determination method in one embodiment;

[0015] Figure 2 It is a flowchart of the wind turbine structure determination method in one embodiment;

[0016] Figure 3 It is a flowchart of the load data acquisition step in one embodiment;

[0017] Figure 4 It is a flowchart of the load strain calculation step in one embodiment;

[0018] Figure 5 It is a flowchart of the wind turbine structure parameter optimization step in one embodiment;

[0019] Figure 6Schematic diagram of the load strain verification steps in an embodiment;

[0020] Figure 7 Schematic diagram of the process of optimizing the design of the fan structure in another embodiment;

[0021] Figure 8 Block diagram of the structure of the fan structure determination device in an embodiment. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] The method for determining the fan structure provided by the present application can be applied to an application environment as shown in Figure 1 . Among them, the terminal 102 communicates with the server 104 through the standard TCP / IP (Transmission Control Protocol / Internet Protocol). The server obtains the fan basic structure model and the marine environment load data corresponding to at least two environmental loads from the terminal; jointly loads the marine environment load data corresponding to at least two environmental loads into the fan basic structure model to obtain the combined load strain based on the strain of the fan basic structure model; determines the target fan components with the steel consumption lower than the set threshold in the fan basic structure model; simplifies the target fan components in the fan basic structure model to obtain the simplified fan basic structure model; takes the basic structure steel consumption corresponding to the simplified fan basic structure model as the optimization objective and the combined load strain as a parameter to optimize the structure of the simplified fan basic structure model to obtain the target fan structure model, and then the target fan structure model can be output to the terminal. Among them, the terminal 102 can be, but is not limited to, various personal computers, laptop computers, smart phones, tablet computers and portable wearable devices, and the server 104 can be implemented by an independent server or a server cluster composed of multiple servers.

[0024] In one embodiment, as shown in Figure 2 , a method for determining the fan structure is provided. Taking the method applied to the server in Figure 1 as an example, the method includes the following steps:

[0025] S202, obtain the fan basic structure model.

[0026] Among them, the fan foundation structure model is a model composed of the fan foundation structure. Among them, the fan can be an offshore fan, an onshore fan, etc. The fan foundation structure is a structure composed of the basic framework of the fan. Taking an offshore fan as an example, the offshore fan is used for offshore wind power generation, and its basic structure can be composed of components such as blades, hub, nacelle, control, tower barrel, and foundation. According to the different structures of the foundations of offshore fans, they can be divided into single-pile foundation fans, concrete gravity foundation fans, high-pile cap foundation fans, and multi-pile jacket platform foundation fans. Among them, the multi-pile jacket platform foundation fan has the widest application range. The multi-pile jacket platform foundation adopts a structure similar to that of an offshore oil jacket platform. First, a steel structure platform composed of steel components is placed on the seabed, and then copper pipe piles are driven through the pile leg sleeves on the platform. The main disadvantage of this structure is that the cost is high due to the use of steel structures. Therefore, it is necessary to optimize the size parameters of the fan structure to reduce the steel consumption.

[0027] In one embodiment, the sizes and connection methods of each component of the fan can be obtained, the components with corresponding sizes are drawn, and each component is spliced together according to the corresponding connection method to obtain the fan foundation structure model.

[0028] Specifically, the structural components of the offshore fan can be determined by combining the external conditions of the offshore wind farm site and the fan design requirements to protect the wind turbine from any danger during the planned period. According to the external conditions of the offshore wind farm site, such as the seabed depth, the lowest still water level, etc., the fan structure of blade-hub-nacelle-control-tower barrel-foundation is designed. In other embodiments, when the fan type is a multi-pile jacket platform foundation fan, the preliminary design conditions of the sample fan jacket structure are selected according to the offshore fan design standards. The jacket foundation can be designed by the pre-piling method. The diagonal braces of the truss-type jacket are preferably connected in an X shape, and horizontal members and diagonal braces should not be provided in the splash zone and the sea ice action zone of the jacket. The connection between the foundation and the jacket foundation can adopt grouting connection. At the same time, the load partial coefficients and structural safety coefficients of the fan under different ultimate states are selected to calculate the load of the fan.

[0029] S204, obtain the marine environmental load data corresponding to at least two environmental loads.

[0030] Among them, the environmental load can be the elements in the marine environmental state, and can include gaseous environmental loads, liquid environmental loads, solid environmental loads, etc. Among them, the gaseous environmental load can be meteorological elements, such as sea breeze. The liquid environmental load can be hydrological elements, such as waves, ocean currents, etc. The solid environmental load can be obstacle elements, such as ice, sand and gravel, etc. The marine environmental load data is the force caused by the environmental load on the marine engineering facilities.

[0031] The basic design of the wind turbine can perform a dynamic characteristic analysis on the overall structure of the wind turbine according to the acting forces generated by marine environmental factors such as ocean waves, wind, ocean currents, and sea ice on offshore engineering facilities. In this embodiment, real-time data of marine hydrological information is collected by marine hydrological information monitoring equipment, and the force data of seawater impacting the wind turbine is collected by an impact force acquisition module using impact force sensors; the real-time data of the offshore wind speed is collected by a wind speed sensor, and the force data of seawater impacting the wind turbine is collected by an impact force sensor.

[0032] S206, jointly load the marine environmental load data corresponding to at least two environmental loads into the wind turbine foundation structure model to obtain combined load strains based on the strains of the wind turbine foundation structure model.

[0033] Combined load strains refer to loading data files generated from two or more marine environmental load data into the wind turbine foundation structure model, performing a coupled time-domain dynamic analysis on the wind turbine and the foundation structure for these two or more marine environmental loads, and obtaining the dynamic displacements and dynamic internal forces of each component in the wind turbine foundation structure model at a specific time.

[0034] Specifically, load the environmental load data obtained in S204 into the wind turbine foundation structure model to obtain combined load strains based on the response of the wind turbine foundation structure to environmental load strains. In one embodiment, a wind turbine foundation model is established, and a combined analysis interface is started. Through this interface, an environmental load data file is loaded to carry out a coupled response analysis under the combined action of wind and waves, and the dynamic response of the offshore wind turbine structure under the combined action of wind and waves is obtained, that is, combined load strains are obtained based on the strains of the wind turbine foundation structure model.

[0035] S208, determine the target wind turbine components in the wind turbine foundation structure model with steel usage below a set threshold.

[0036] Specifically, the wind turbine foundation structure model obtained in S202 includes components such as blades, wheel loads, nacelles, controls, tower barrels, and foundations. The steel usage for building the components is determined according to the historical data of component steel usage. When the steel usage of a certain component is below the preset value, this component is determined as the target wind turbine component. The size of the steel usage threshold can be determined according to the actual situation.

[0037] In one embodiment, the wind turbine components with steel usage higher than the set threshold can be used as the main components, and the wind turbine components with steel usage lower than the set threshold can be used as the secondary components. Retain the structure of the main components and simplify the structure of the secondary components to obtain a simplified wind turbine foundation structure model.

[0038] S210, simplify the target wind turbine components to obtain a simplified wind turbine foundation structure model.

[0039] Specifically, simplify the structure of the target wind turbine components obtained in S208 to obtain a simplified wind turbine foundation model. Among them, the simplification process is to replace the target wind turbine components with structures that have nothing to do with the steel consumption. For example, replace the target wind turbine components with solid points or straight line segments, etc.

[0040] In one embodiment, if the steel consumption of the blades and nacelle components in the wind turbine components is lower than the preset value, simplify them into concentrated masses and simplify them into particles at the centroid position to obtain a simplified wind turbine foundation structure.

[0041] S212, taking the steel consumption corresponding to the simplified wind turbine foundation structure model as the optimization target and the combined load strain as a parameter, perform structural optimization on the simplified wind turbine foundation structure model to obtain the target wind turbine structure model.

[0042] Specifically, taking the steel consumption of the simplified wind turbine foundation structure model obtained in S210 as the optimization target and the combined load strain as a parameter, perform structural optimization on the simplified wind turbine foundation structure model to obtain the target wind turbine structure model. Further, a function model between the steel consumption and the combined load strain can be constructed. Taking the steel consumption as the optimization target and the combined load strain as a parameter, determine the optimal value of the function model, and determine the wind turbine foundation result corresponding to the combined load strain under the optimal value as the target wind turbine foundation structure model.

[0043] In one embodiment, model the offshore wind turbine foundation structure, describe the optimization design process by defining design variables, state variables and objective functions, take the steel consumption of the foundation structure as the optimization target, and take the dynamic characteristics and ultimate bearing capacity of the offshore wind turbine foundation structure as parameters to perform optimization design on the offshore wind turbine foundation structure, obtain the optimized parameters of the offshore wind turbine foundation structure, and obtain the target wind turbine structure model.

[0044] In the above method for determining the wind turbine structure, obtain the marine environmental load data corresponding to the environmental load, jointly load the marine environmental load data into the wind turbine foundation structure model, obtain the combined load strain based on the strain of the wind turbine foundation structure model, and take the steel consumption of the wind turbine foundation structure as the optimization target and the combined load strain as a parameter to perform structural optimization on the simplified wind turbine foundation structure model to obtain the target wind turbine structure model, which can obtain a more accurate wind turbine foundation structure model and reduce the steel consumption of the offshore wind turbine structure.

[0045] In one embodiment, as Figure 3 shown, obtain the marine environmental load data corresponding to at least two environmental loads, including:

[0046] S302, determine the type of environmental load; the type of environmental load includes at least one of gaseous environmental load, liquid environmental load and solid environmental load.

[0047] Among them, the gaseous environmental load refers to the force exerted on the wind turbine by gaseous objects, such as wind load; the liquid environmental load refers to the force exerted on the wind turbine by liquid objects, such as wave load and ocean current load; the solid environmental load refers to the force exerted on the wind turbine by solid objects, such as ice load and sand load.

[0048] Specifically, select two or more loads from multiple loads and determine the types of the selected loads.

[0049] S304. Determine the environmental monitoring equipment corresponding to each environmental load based on the type of environmental load.

[0050] Among them, the environmental monitoring equipment is a device that monitors and obtains environmental data according to the type of environmental load. Specifically, according to the type of environmental load determined in S304, select the corresponding environmental monitoring equipment to observe the corresponding environmental data. In one embodiment, when it is necessary to obtain the liquid environmental load, the environmental monitoring equipment can be a marine hydrological information collector. Use this equipment to collect real-time data of marine hydrological information, and collect the force data of seawater impacting the wind turbine through an impact sensor to obtain the wave load; when it is necessary to obtain the gaseous environmental load, the environmental monitoring equipment can be a marine wind speed information collector. Use this equipment to collect real-time data of marine wind speed information to obtain the wind load.

[0051] S306. Based on the environmental monitoring equipment, obtain the historical forces when the marine environmental object acts on the offshore wind turbine.

[0052] Specifically, based on the environmental monitoring equipment determined in S304, obtain the real-time data of the marine environmental object collecting marine environmental information, and obtain the historical forces when the marine environmental object acts on the offshore wind turbine based on the real-time data of the marine environmental information.

[0053] S308. Obtain the marine environmental load data corresponding to each environmental load based on the historical forces.

[0054] Specifically, obtain the marine environmental load data corresponding to each environmental load according to the historical forces obtained in S306. In one embodiment, the maximum and minimum values can be removed from the historical wave loads collected by the marine hydrological information collector within a period of time, and then the average value is calculated and used as the wave load.

[0055] In this embodiment, by using the environmental monitoring equipment to obtain the historical data of the corresponding environmental load and obtaining the load data loaded on the wind turbine foundation structure according to the historical data, the load data loaded on the wind turbine foundation structure can be made to be more in line with the actual marine environmental load data.

[0056] In one embodiment, the marine environmental load data corresponding to at least two environmental loads are jointly loaded into the wind turbine foundation structure model to obtain the combined load strain based on the strain of the wind turbine foundation structure model, including:

[0057] Jointly load the marine environmental load data corresponding to at least two environmental loads into the wind turbine foundation structure model; determine the dynamic displacement and dynamic internal force generated by the wind turbine foundation structure model under the combined action of at least two environmental loads, and obtain the combined load strain corresponding to the wind turbine foundation structure model.

[0058] Specifically, the marine environmental load data corresponding to at least two environmental loads are simultaneously input into the wind turbine foundation structure model to obtain the combined load strain corresponding to the wind turbine foundation structure model. In one embodiment, obtaining the combined load strain corresponding to the wind turbine foundation structure includes:

[0059] (1) Create an input file for the overall structure model of the offshore wind turbine. The main program of the FAST modeling software reads this file and checks the validity of the model file.

[0060] (2) The aerodynamic elastic analysis module and the hydrodynamic calculation module respectively read the wind speed time history file and the sea condition file, thereby determining the initial conditions and boundary conditions. Based on the model file of the wind power load simulation software FAST (Fatigue Aerodynamics Structures Turbulence), perform aerodynamic elastic analysis and hydrodynamic calculation respectively to obtain the aerodynamic load and hydrodynamic load at the initial moment.

[0061] (3) According to the initial moment environmental load obtained in step (2), the overall structure dynamic response analysis is carried out by the structural dynamic analysis module and the foundation structure module. At the same time, the control strategy module judges whether it is necessary to start the control strategy according to the operating state of the wind turbine, so as to obtain the overall structure dynamic response parameters at the moment to be measured (k = 1, 2, 3,..., n; n is the total number of calculation steps) such as acceleration, velocity, displacement, internal force, etc.

[0062] (4) Based on the dynamic response parameters of each part of the overall structure obtained in step (3), the aerodynamic elastic analysis module and the hydrodynamic calculation module respectively calculate the relative oncoming wind speed of each blade element and the relative water particle velocity of each node of the foundation structure member below the design water level and their corresponding aerodynamic loads and hydrodynamic loads.

[0063] (5) Based on the results obtained in step (4) The aerodynamic loads corresponding to the relative incoming flow velocity of each blade's leaf element and the relative water particle velocity of each node of the foundation structure members, and the hydrodynamic loads, the structural dynamics analysis module and the foundation structure module carry out the next moment separated by one time step from the moment to be measured Overall structural dynamic response analysis, and at the same time, the control strategy module determines whether to activate the control strategy based on the operating state of the fan, so as to obtain the dynamic response parameters of each part of the overall structure.

[0064] (6) Repeat steps (4) and (5) until the boundary condition calculation and structural dynamic response analysis for all time steps are completed. It should be noted that the FAST software is based on Calculation of aerodynamic loads and hydrodynamic loads Structural dynamic response of Structural dynamic response of Structural aeroelastic analysis and hydrodynamic load calculation of the structure (k = 1, 2, 3,..., n; n is the total number of calculation time steps).

[0065] In this embodiment, loading two or more environmental loads into the fan foundation structure model and performing coupled dynamic characteristic analysis on the wind foundation structure model can obtain more accurate dynamic characteristics, laying a foundation for reducing the steel consumption of the fan.

[0066] In one embodiment, as Figure 4 shown, taking the steel consumption of the foundation structure corresponding to the simplified fan foundation structure model as the optimization goal and the combined load strain as the parameter, after performing structural optimization on the simplified fan foundation structure model to obtain the target fan structure model, it further includes:

[0067] S402, jointly loading the marine environment load data corresponding to at least two environmental loads onto the target fan structure model.

[0068] Specifically, jointly load the marine environment load data corresponding to two or more environmental loads into the simplified fan foundation structure.

[0069] S404, determine the dynamic displacement and dynamic internal force generated by the target fan structure model under the combined action of at least two environmental loads, and obtain the second combined load strain corresponding to the target fan structure model.

[0070] Among them, the second combined load strain refers to the bearing capacity of the foundation of the fan structure under the cyclic stimulation of the load. In one embodiment, if the fan structure is a single-pile type fan, the bearing capacity of the single-pile foundation is formed by the frictional resistance inside the pile, the frictional resistance outside the pile, and the end resistance of the pile. Among the factors affecting the bearing capacity of the single-pile foundation are the pile diameter and length, the pile wall thickness, and the soil properties inside the steel pipe column, etc.

[0071] S406. Conduct a load strain check on the target wind turbine structure model based on the comparison result of the first combined load strain and the second combined load strain.

[0072] Specifically, optimize and adjust the structural parameters affecting the second combined load strain so that the second combined load strain is within the allowable value stipulated by the state. At the same time, the second combined load strain also needs to be within the allowable value range, and find the optimal size parameters of the target wind turbine structure model from them. In one embodiment, the pile diameter length and pile wall thickness of the single-pile foundation can be changed until both the first combined load data and the second combined load data are within the allowable value range.

[0073] S408. Adjust the target wind turbine structure model based on the load strain check result.

[0074] Specifically, according to the optimal size parameters of the target wind turbine structure model obtained in S408, re-model the target wind turbine structure model to obtain the adjusted target wind turbine structure model.

[0075] In one embodiment, simplify the target wind turbine components in the wind turbine foundation structure model to obtain a simplified wind turbine foundation structure model, including:

[0076] Determine the centroid position corresponding to the target wind turbine components.

[0077] Specifically, since most of the steel materials for building the components are homogeneous media, the centroid position can be determined according to the geometric shape of the steel.

[0078] Simplify the target wind turbine components in the wind turbine foundation structure model to points at the centroid position to obtain a simplified wind turbine foundation structure model.

[0079] Specifically, simplify the target wind turbine components to particles located at the centroid position to obtain a simplified wind turbine foundation structure model.

[0080] In this embodiment, simplifying the wind turbine components with steel usage lower than the preset threshold to particles to obtain a simplified wind turbine foundation structure model can simplify the subsequent process of optimizing the wind turbine foundation structure parameters and improve the optimization efficiency of determining the wind turbine structure.

[0081] In one embodiment, as Figure 5 shown, taking the steel usage of the foundation structure corresponding to the simplified wind turbine foundation structure model as the optimization target and the first combined load strain as a parameter, conduct structural optimization on the simplified wind turbine foundation structure model to obtain a target wind turbine structure model, including:

[0082] S502. Construct a regression function with the steel usage of the foundation structure as the dependent variable and the first combined load strain as the independent variable.

[0083] Specifically, through a large number of experimental measurements, experimental data on the first combined load and the steel consumption of the foundation structure are obtained, and a suitable function is selected to fit the experimental data. In one embodiment, a function can also be constructed with the steel consumption of the foundation structure as the dependent variable and the first combined load and the second combined load as the independent variables.

[0084] S504, perform regression analysis based on the constructed regression function, and determine the optimized steel consumption of the foundation structure based on the results of the regression analysis.

[0085] Specifically, optimize the selected function model parameters until an objective function model closest to the actual measurement data of the first combined load and the steel consumption of the foundation structure is selected; in one embodiment, the least squares method can be used to optimize the selected function model parameters.

[0086] S506, determine the target fan structure model parameters corresponding to the optimal steel consumption of the foundation structure.

[0087] According to the objective function model obtained in S502, on the premise of ensuring that the first combined load is within the allowable value range, find the optimal steel consumption of the foundation structure, and determine the target fan structure model parameters corresponding to the optimal steel consumption of the foundation structure at this time.

[0088] S508, adjust the fan foundation structure model based on the target fan structure model parameters to obtain the target fan structure model.

[0089] In this embodiment, with the steel consumption of the foundation structure as the dependent variable and the strain of the first combined load as the independent variable, a regression function is constructed, the regression function is analyzed to determine the optimal steel consumption of the foundation structure, and the target fan structure model corresponding to the optimal steel consumption of the foundation structure is obtained, which can reduce the steel consumption of the fan structure on the basis of ensuring that the first combined load is within the allowable value range.

[0090] In one embodiment, as Figure 6 shown, obtaining the fan foundation structure model includes:

[0091] S602, obtain the fan installation location.

[0092] Specifically, obtain the fan installation location, and determine the marine terrain environment at this location according to the fan installation location, where the marine terrain environment includes seabed geological conditions, seabed depth, and lowest still water level, etc.

[0093] S604, determine the size of the installation space area corresponding to the fan installation location according to the marine terrain environment.

[0094] Specifically, design the specific orientation of the fan installation and the area size of each fan component installation according to the above marine terrain environment.

[0095] S606. Determine the target dimensions corresponding to the tower barrel and / or foundation of the wind turbine based on the dimensions of the installation space area.

[0096] Among them, the target dimensions refer to the dimensions such as the embedding depth of the foundation, the length of the steel pipe pile, and the wall thickness of the steel pipe.

[0097] Specifically, determine the dimension data such as the embedding depth of the wind turbine foundation, the length of the steel pipe pile, and the wall thickness of the steel pipe according to the marine terrain environment on the installation area dimensions obtained in S602.

[0098] S608. Determine the wind turbine foundation structure model based on the target dimensions.

[0099] In this embodiment, designing the wind turbine foundation structure model according to the terrain environment of the installation position of the wind turbine can make the wind turbine foundation structure better adapt to the installation environment, thereby more effectively ensuring the safety of the wind turbine operation and extending the service life of the wind turbine.

[0100] In one embodiment, as Figure 7 shown, an optimization design and analysis method is proposed. Taking the application of this method to a server as an example, it includes the following steps and features:

[0101] Step 1: Select the preliminary design conditions and corresponding load combination marine environment load parameters of the sample wind turbine jacket structure according to the offshore wind turbine design standard. At the same time, select the load partial coefficients and structural safety coefficients under different limit states according to the offshore wind turbine structure design standard and the shallow water fixed steel platform design standard.

[0102] Step 2: Establish an initial overall coupled calculation model of the offshore wind turbine under the combined action of wind and waves in the wind power load simulation software FAST (Fatigue Aerodynamics Structures Turbulence), as shown in FAST① in Figure 7 . This model consists of structures such as rotor blades, electrical equipment drive systems, tower barrels, and foundations, among which the rotor blades and the electrical equipment drive system form a control system. Start the coupled analysis interface of the wind power load simulation software FAST, and load the wind load data file and the wave load data file through this interface to carry out the coupled response analysis under the combined action of wind and waves, and obtain the dynamic response analysis of the initial overall coupled calculation model of the offshore wind turbine.

[0103] Step 3: Calculate the wind turbine load at the bottom of the tower barrel of the offshore wind turbine based on the overall coupled initial calculation model established in Step 2.

[0104] Step 4: Based on the software for the overall design analysis of offshore fixed structures, a simplified overall structure model of the offshore wind turbine is established. The rotor nacelle assembly is simplified as a concentrated mass and applied at its corresponding centroid position. At the same time, a finite element model of the tower and foundation structure is established using beam elements, and the p-y, t-z, and q-z curves are used to simulate the pile-soil interaction of the foundation structure of the sample wind turbine.

[0105] Step 5: Read the wind turbine loads at the bottom of the tower calculated by the FAST software in Step 3 and input them into the software SACS for the overall design analysis of offshore fixed structures. This simulation software is as Figure 7 shown in SACS②. Conduct a bearing capacity check.

[0106] Step 6: Use the finite element analysis software to model the offshore wind turbine foundation structure. Utilize the built-in optimization module of the finite element analysis software to describe the optimization design process by defining design variables, state variables, and objective functions. Take the steel consumption of the foundation structure as the optimization objective and the dynamic characteristics and ultimate bearing capacity of the offshore wind turbine foundation structure as parameters to optimize the design of the offshore wind turbine foundation structure and obtain the optimized parameters of the offshore wind turbine foundation structure.

[0107] Step 7: Establish a new overall coupled calculation model in FAST with the optimized parameters to calculate the wind turbine loads at the bottom of the tower.

[0108] Step 8: Modify the parameters in the software SACS for the overall design analysis of offshore fixed structures with the optimized parameters and re-establish a simplified overall structure model of the offshore wind turbine. Input the wind turbine loads calculated in Step 7 into the SACS software for a bearing capacity check.

[0109] Step 9: Check the dynamic characteristics of the sample wind turbine structure: Use the software for the overall design analysis of offshore fixed structures in Step 8 and the FAST overall model in Step 7 to conduct a modal analysis of the overall structure including the wind turbine, tower, and foundation, and check the natural vibration frequency of the overall structure to avoid the resonance frequency range of the first rotor rotation frequency and high multiple rotor rotation frequencies of the offshore wind turbine, so as to meet the requirements of economy and safe operation of the wind turbine.

[0110] Step 10: Check the bearing capacity of the sample wind turbine structure under multiple limit states: Use the finite element model of the software SACS for the overall design analysis of offshore fixed structures in Step 8 to conduct an ultimate strength analysis and joint punching shear check of the offshore wind turbine foundation to meet the stress control standard of the foundation structure members under the limit state; calculate and check the bearing capacity of the foundation piles to ensure that the maximum bearing capacity of the foundation structure meets the safety requirements under extreme loads; at the same time, conduct an analysis of the normal use limit state of the offshore wind turbine foundation to ensure that the foundation structure deformation meets the normal operation requirements of the wind turbine unit, so as to be used for subsequent research on the coupled fatigue analysis method of the offshore wind turbine structure.

[0111] Step 11: Read the node punching shear check file calculated in Step 10, and select the nodes with larger load effect / resistance values except for the nodes in the transition section as the key tubular joints for fatigue bearing capacity check.

[0112] Step 12: According to the interval division of the mean wind speed, significant wave height and wave spectrum period in the combined wind-wave probability distribution table, count the required combined wind-wave action conditions.

[0113] Step 13: Use the FAST overall coupled calculation model of the offshore wind turbine in Step 7 to obtain the internal force time history file of the key tubular joints.

[0114] Step 14: According to the nominal stress formula, SCF (hot spot stress concentration factor) formula and hot spot stress formula, develop a hot spot stress calculation module using python, and calculate the hot spot stress time history file of the key tubular joints from the internal force time history file in Step 13.

[0115] Step 15: From the hot spot stress time history file obtained in Step 14, obtain the fatigue cumulative damage of the key tubular joints according to the rain flow counting method, S-N curve and fatigue cumulative criterion, so as to check the bearing capacity of the foundation structure.

[0116] In this embodiment, the coupling effect between the aerodynamic load, hydrodynamic load and the structural response of the offshore wind turbine is fully considered. First, an initial model of the foundation structure is established, and the foundation structure is optimized with the steel consumption of the foundation structure as the optimization goal; on the basis of the optimized design of the foundation structure, an overall coupled model of the offshore wind turbine including the rotor structure - tower structure - foundation structure and the drive system and electro-mechanical servo control strategy is established. Based on this overall coupled model, an overall coupled fatigue analysis method of the offshore wind turbine is established, and the coupled fatigue analysis and fatigue cumulative calculation of the offshore wind turbine are carried out to check the fatigue bearing capacity of the foundation structure, considering the coupling effect between the environmental load, rotor nacelle assembly and support system (tower, foundation structure), obtaining a more accurate structural safety factor and reducing the steel consumption of the wind turbine structure.

[0117] It should be understood that although Figure 2-7 the steps in the flowchart Figure 2-7At least some of the steps may include multiple steps or multiple stages, and these steps or stages do not necessarily need to be executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages does not necessarily need to be sequential, but can be executed alternately or in turn with at least some of the steps or stages in other steps or other steps.

[0118] In one embodiment, as Figure 8 shown, a wind turbine structure determination device 800 is provided, including: a load data acquisition module 802, a load strain calculation module 804, a load strain calculation module 806, a wind turbine component determination module 808, a wind turbine structure simplification module 810, and a wind turbine structure optimization module 812, where:

[0119] The wind turbine structure acquisition module 802 is configured to acquire a wind turbine foundation structure model.

[0120] The load data acquisition module 804 is configured to acquire marine environment load data corresponding to at least two environmental loads.

[0121] The load strain calculation module 806 is configured to jointly load the marine environment load data corresponding to the at least two environmental loads into the wind turbine foundation structure model, so as to obtain a first joint load strain based on the strain of the wind turbine foundation structure model.

[0122] The wind turbine component determination module 808 determines a target wind turbine component with a steel consumption lower than a set threshold in the wind turbine foundation structure model.

[0123] The wind turbine structure simplification module 810 simplifies the target wind turbine component to obtain a simplified wind turbine foundation structure model.

[0124] The wind turbine structure optimization module 812 takes the steel consumption corresponding to the simplified wind turbine foundation structure model as an optimization target, and takes the first joint load strain as a parameter to perform structural optimization on the simplified wind turbine foundation structure model to obtain a target wind turbine structure model.

[0125] The above-mentioned wind turbine structure determination device 800 acquires marine environment load data corresponding to environmental loads, jointly loads the marine environment load data into the wind turbine foundation structure model, obtains a joint load strain based on the strain of the wind turbine foundation structure model, and takes the steel consumption of the wind turbine foundation structure as an optimization target and the joint load strain as a parameter to perform structural optimization on the simplified wind turbine foundation structure model to obtain a target wind turbine structure model, which can obtain a more accurate wind turbine foundation structure model and reduce the steel consumption of the offshore wind turbine structure.

[0126] In one embodiment, the load data acquisition module includes: a load type determination sub-module for determining the type of environmental load; the type of environmental load includes at least one of gaseous environmental load, liquid environmental load, and solid environmental load; a monitoring device determination sub-module for determining the environmental monitoring device corresponding to each environmental load based on the type of environmental load; a historical load acquisition sub-module for acquiring the historical acting force when the marine environmental object acts on the offshore wind turbine based on the environmental monitoring device; a load data determination sub-module for obtaining the marine environmental load data corresponding to each environmental load based on the historical acting force.

[0127] In one embodiment, the load data acquisition module is further configured to jointly load the marine environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model; determine the dynamic displacement and dynamic internal force generated by the wind turbine foundation structure model under the combined action of the at least two environmental loads, and obtain the combined load strain corresponding to the wind turbine foundation structure model.

[0128] In one embodiment, the wind turbine determination device further includes: a load data loading module for jointly loading the marine environmental load data corresponding to the at least two environmental loads into the target wind turbine structure model; a load strain determination module for determining the dynamic displacement and dynamic internal force generated by the target wind turbine structure model under the combined action of the at least two environmental loads, and obtaining the second combined load strain corresponding to the target wind turbine structure model; a load strain comparison module for performing load strain verification on the target wind turbine structure model based on the comparison result of the first combined load strain and the second combined load strain; a wind turbine structure adjustment module for adjusting the target wind turbine structure model based on the load strain verification result.

[0129] In one embodiment, the wind turbine structure simplification module is further configured to determine the centroid position of the target wind turbine component; simplify the target wind turbine component in the wind turbine foundation structure model to a point at the centroid position, and obtain the simplified wind turbine foundation structure model.

[0130] In one embodiment, the wind turbine structure optimization module includes: a function construction sub-module for constructing a regression function with the steel consumption of the foundation structure as the dependent variable and the first combined load strain as the independent variable; a regression analysis sub-module for performing regression analysis based on the constructed regression function and determining the optimized steel consumption of the foundation structure based on the result of the regression analysis; a structure parameter determination sub-module for determining the target wind turbine structure model parameters corresponding to the optimized steel consumption of the foundation structure; a target model determination sub-module for adjusting the wind turbine foundation structure model based on the target wind turbine structure model parameters to obtain the target wind turbine structure model.

[0131] In one embodiment, the fan structure acquisition module includes: an installation position acquisition sub-module for acquiring the installation position of the fan; an area size determination sub-module for determining the size of the installation space area corresponding to the fan installation position according to the marine terrain environment; a component size determination sub-module for determining the target size corresponding to the tower barrel and / or foundation of the fan based on the size of the installation space area; and a structure model determination sub-module for determining the fan foundation structure model based on the target size.

[0132] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0133] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A method for determining the structure of a fan, characterized in that, The method includes: Obtaining a wind turbine foundation structure model; the wind turbine foundation structure model is a model composed of a wind turbine foundation structure; the wind turbine is an offshore wind turbine, and the basic structure of the offshore wind turbine is composed of blades, hub, nacelle, control system, tower and foundation; Obtaining ocean environmental load data corresponding to at least two environmental loads; Jointly loading the ocean environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model to obtain a first combined load strain based on the strain of the wind turbine foundation structure model; Determining a target wind turbine component in the wind turbine foundation structure model with a steel consumption lower than a set threshold; Simplifying the target wind turbine component in the wind turbine foundation structure model to obtain a simplified wind turbine foundation structure model; Taking the foundation structure steel consumption corresponding to the simplified wind turbine foundation structure model as an optimization target and the first combined load strain as a parameter, performing structural optimization on the simplified wind turbine foundation structure model to obtain a target wind turbine structure model; The step of jointly loading the ocean environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model to obtain a first combined load strain based on the strain of the wind turbine foundation structure model includes: jointly loading the ocean environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model; determining the dynamic displacement and dynamic internal force generated by the wind turbine foundation structure model under the combined action of the at least two environmental loads to obtain the first combined load strain corresponding to the wind turbine foundation structure model; The step of simplifying the target wind turbine component in the wind turbine foundation structure model to obtain a simplified wind turbine foundation structure model includes: determining the centroid position corresponding to the target wind turbine component; simplifying the target wind turbine component in the wind turbine foundation structure model to a point at the centroid position to obtain a simplified wind turbine foundation structure model; The step of taking the foundation structure steel consumption corresponding to the simplified wind turbine foundation structure model as an optimization target and the first combined load strain as a parameter, performing structural optimization on the simplified wind turbine foundation structure model to obtain a target wind turbine structure model includes: constructing a regression function with the foundation structure steel consumption as the dependent variable and the first combined load strain as the independent variable; performing regression analysis based on the constructed regression function, determining the optimal foundation structure steel consumption based on the results of the regression analysis; determining the target wind turbine structure model parameters corresponding to the optimal foundation structure steel consumption; adjusting the wind turbine foundation structure model based on the target wind turbine structure model parameters to obtain a target wind turbine structure model.

2. The method according to claim 1, wherein The step of obtaining ocean environmental load data corresponding to at least two environmental loads includes: Determining the type of environmental load; the type of environmental load includes at least one of gaseous environmental load, liquid environmental load and solid environmental load; Determining the environmental monitoring equipment corresponding to each environmental load based on the type of environmental load; Obtaining the historical acting force of the ocean environmental object on the offshore wind turbine based on the environmental monitoring equipment; Obtain the marine environmental load data corresponding to each environmental load based on the historical acting force.

3. The method according to claim 1, characterized in that, After taking the steel consumption of the foundation structure corresponding to the simplified wind turbine foundation structure model as the optimization objective and using the first combined load strain as a parameter to perform structural optimization on the simplified wind turbine foundation structure model to obtain the target wind turbine structure model, it further includes: Jointly load the marine environmental load data corresponding to the at least two environmental loads onto the target wind turbine structure model; Determine the dynamic displacement and dynamic internal force generated by the target wind turbine structure model under the combined action of the at least two environmental loads to obtain the second combined load strain corresponding to the target wind turbine structure model; Perform load strain checking on the target wind turbine structure model based on the comparison result of the first combined load strain and the second combined load strain; Adjust the target wind turbine structure model based on the load strain checking result.

4. The method according to claim 1, wherein The obtaining of the wind turbine foundation structure model includes: Obtain the installation location of the wind turbine; Determine the size of the installation space area corresponding to the wind turbine installation location according to the marine terrain environment; Determine the target size corresponding to the tower barrel and / or the foundation on the wind turbine based on the size of the installation space area; Determine the wind turbine foundation structure model based on the target size.

5. A device for determining the structure of a fan, characterized in that, The device includes: A wind turbine structure obtaining module for obtaining a wind turbine foundation structure model; the wind turbine foundation structure model is a model composed of a wind turbine foundation structure; the wind turbine is an offshore wind turbine, and the basic structure of the offshore wind turbine consists of blades, a wheel load, a nacelle, control, a tower barrel, and a foundation; A load data obtaining module for obtaining the marine environmental load data corresponding to at least two environmental loads; A load strain calculation module for jointly loading the marine environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model to obtain the first combined load strain based on the strain of the wind turbine foundation structure model; A wind turbine component determination module for determining a target wind turbine component with a steel consumption lower than a set threshold in the wind turbine foundation structure model; A wind turbine structure simplification module for simplifying the target wind turbine component to obtain a simplified wind turbine foundation structure model; A wind turbine structure optimization module for performing structural optimization on the simplified wind turbine foundation structure model with the steel consumption corresponding to the simplified wind turbine foundation structure model as the optimization objective and using the first combined load strain as a parameter to obtain the target wind turbine structure model; The jointly loading the marine environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model to obtain the first combined load strain based on the strain of the wind turbine foundation structure model includes: jointly loading the marine environmental load data corresponding to the at least two environmental loads into the wind turbine foundation structure model; determining the dynamic displacement and dynamic internal force generated by the wind turbine foundation structure model under the combined action of the at least two environmental loads to obtain the first combined load strain corresponding to the wind turbine foundation structure model; Simplifying the target fan component in the fan foundation structure model to obtain a simplified fan foundation structure model, including: determining the centroid position corresponding to the target fan component; simplifying the target fan component in the fan foundation structure model to a point at the centroid position to obtain a simplified fan foundation structure model; Taking the steel consumption of the foundation structure corresponding to the simplified fan foundation structure model as the optimization target and the first combined load strain as a parameter, performing structural optimization on the simplified fan foundation structure model to obtain a target fan structure model, including: constructing a regression function with the steel consumption of the foundation structure as the dependent variable and the first combined load strain as the independent variable; performing regression analysis based on the constructed regression function, determining the optimal steel consumption of the foundation structure based on the results of the regression analysis; determining the target fan structure model parameters corresponding to the optimal steel consumption of the foundation structure; adjusting the fan foundation structure model based on the target fan structure model parameters to obtain a target fan structure model.

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