Wind power blade deformation evaluation method, device, equipment and product

Abstract

The invention provides a wind power blade deformation evaluation method, device, equipment and product, and the method comprises the steps: building a first shell element finite element model corresponding to a wind power blade based on the basic parameter information of the wind power blade, and simulating a first shell element finite element model of the wind power blade under the boundary condition of a load working condition; performing finite element analysis on the load information and the first shell element finite element model to obtain a corresponding second shell element finite element model after the wind power blade is deformed; and processing the first shell unit finite element model and the second shell unit finite element model to obtain an out-of-plane deformation angle of the wind power blade, and evaluating the deformation of the wind power blade based on the out-of-plane deformation angle and a preset condition. Therefore, the deformation of the wind power blade can be evaluated more comprehensively.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a method, apparatus, equipment and product for evaluating wind turbine blade deformation. Background Technology

[0002] As people become increasingly aware of environmental protection, clean energy is receiving more and more attention. Wind energy, as a clean energy source, has garnered particular interest. To fully utilize wind energy, wind turbine generators are being used more and more widely.

[0003] Among them, the blades, as the components of a wind turbine that directly interact with wind power, are of paramount importance. As wind turbines continue to evolve towards larger sizes, the dimensions of wind turbine blades are constantly increasing, and the loads they bear are also continuously growing. Consequently, the strength requirements for wind turbine blades are also constantly increasing, especially for the strength requirements of local structural areas that undergo significant deformation under load. Because the deformation of wind turbine blades under wind loads is quite complex, a comprehensive assessment of wind turbine blade deformation is of great significance for guiding the design of wind turbine blades. Summary of the Invention

[0004] In view of the above problems, this application provides a method for evaluating the deformation of wind turbine blades, which can improve the comprehensiveness of the evaluation of wind turbine blade deformation.

[0005] Firstly, this application provides a method for evaluating the deformation of wind turbine blades, the method comprising: Obtain basic parameter information of wind turbine blades; Based on the basic parameter information of the wind turbine blade, a first shell element finite element model of the wind turbine blade is established. Set the simulated load conditions for wind turbine blades; Determine the load information of wind turbine blades under simulated load conditions; Under the boundary conditions of the simulated load, finite element analysis is performed on the load information and the first shell element finite element model to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade. The first shell element finite element model and the second shell element finite element model are processed to obtain the out-of-plane deformation angle of the wind turbine blade. Wind turbine blade deformation is evaluated based on out-of-plane deformation angle and preset conditions.

[0006] According to the wind turbine blade deformation evaluation method provided in some embodiments of this application, the steps of processing the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade include: Extract the coordinate data of key nodes in the first shell element finite element model, and determine the directional angle of the normal vector of the key nodes in the first shell element finite element model; Extract the coordinate data of the key nodes in the second shell element finite element model, and determine the directional angle of the normal vector of the key nodes in the second shell element finite element model. The directional angle of the normal vector in the first shell element finite element model and the angle of change of the directional angle of the normal vector in the second shell element finite element model are obtained for the key nodes. The angle of change is used as the out-of-plane deformation angle of the wind turbine blade.

[0007] According to the wind turbine blade deformation assessment method provided in some embodiments of this application, some key nodes are located in the maximum deformation region in the first shell element finite element model.

[0008] According to the wind turbine blade deformation evaluation method provided in some embodiments of this application, the wind turbine blade includes multiple interconnected blade substructures, and the basic parameter information of the wind turbine blade includes the shape information, material information, and center of gravity coordinates of the multiple blade substructures; the step of establishing a first shell element finite element model corresponding to the wind turbine blade based on the basic parameter information of the wind turbine blade includes: By performing equivalent processing on multiple blade substructures in wind turbine blades, a simplified model of the blade substructure is obtained. The simplified model of the blade substructure is divided into several simplified units; Based on the shape information, material information, and center of gravity coordinates of each blade substructure, the elastic modulus, Poisson's ratio, density, and shear modulus of each simplified element of the simplified model of each blade substructure are calculated, and the coordinate data and elastic modulus of each simplified element are used as the first shell element finite element model.

[0009] According to the wind turbine blade deformation assessment method provided in some embodiments of this application, the blade substructure includes a main beam, a web, a core material, and an auxiliary beam.

[0010] According to the wind turbine blade deformation evaluation method provided in some embodiments of this application, the steps of performing finite element analysis on load information and a first shell element finite element model under simulated load conditions to obtain a second shell element finite element model corresponding to the wind turbine blade deformation include: Under the boundary conditions of the simulated load, finite element analysis was performed on the load information and the first shell element finite element model to obtain the displacement data of the first shell element finite element model. The second shell element finite element model of the wind turbine blade after deformation is obtained based on the displacement data.

[0011] According to the wind turbine blade deformation assessment method provided in some embodiments of this application, the wind turbine blade deformation assessment method further includes: The out-of-plane deformation angle of the wind turbine blades is normalized.

[0012] According to some embodiments of this application, the method for evaluating wind turbine blade deformation includes a preset out-of-plane deformation angle as a preset condition. The steps for evaluating wind turbine blade deformation based on the out-of-plane deformation angle and the preset condition are as follows: compare the out-of-plane deformation angle with the preset out-of-plane deformation angle. If the out-of-plane deformation angle is less than or equal to the preset out-of-plane deformation angle, the wind turbine blade deformation meets the requirements. If the out-of-plane deformation angle is greater than the preset out-of-plane deformation angle, the wind turbine blade deformation does not meet the requirements.

[0013] Secondly, this application provides a wind turbine blade deformation assessment device, which includes: The acquisition module is used to acquire basic parameter information of wind turbine blades; The first module establishes a finite element model of the first shell element corresponding to the wind turbine blade based on the basic parameter information of the wind turbine blade. The setting module is used to set the simulated load conditions for wind turbine blades; The determination module is used to determine the load information of wind turbine blades under simulated load conditions; The analysis module is used to perform finite element analysis on the load information and the first shell element finite element model under the boundary conditions of the simulated load condition, so as to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade. The processing module is used to process the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade. The evaluation module is used to evaluate the out-of-plane deformation angle as an indicator of wind turbine blade deformation.

[0014] Thirdly, this application provides an electronic device comprising: a processor and a memory storing computer program instructions; and a method for evaluating wind turbine blade deformation that, when the processor executes the computer program instructions, implements any one of the above-mentioned methods.

[0015] Fourthly, this application provides a computer program product in which the instructions are executed by the processor of an electronic device, causing the electronic device to perform the wind turbine blade deformation assessment method as described above.

[0016] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects: This application provides a method, apparatus, equipment, and product for evaluating the deformation of wind turbine blades. The method is based on the basic parameter information of the wind turbine blade, establishing a first shell element finite element model corresponding to the blade. Under simulated load conditions, finite element analysis is performed on the load information and the first shell element finite element model to obtain a second shell element finite element model corresponding to the deformed blade. The out-of-plane deformation angle of the wind turbine blade is obtained by processing the first and second shell element finite element models. The deformation of the wind turbine blade is evaluated based on the out-of-plane deformation angle and preset conditions. This scheme can measure the out-of-plane deformation of wind turbine blades, enabling a more comprehensive evaluation of their deformation.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This application provides a method for evaluating wind turbine blade deformation in some embodiments. Figure 2 This is a flowchart illustrating step S6 in the wind turbine blade deformation assessment method provided in some embodiments of this application. Figure 3 This is a flowchart illustrating step S2 in the wind turbine blade deformation assessment method provided in some embodiments of this application. Figure 4 This is a flowchart illustrating step S5 in the wind turbine blade deformation assessment method provided in some embodiments of this application. Figure 5 This is a schematic diagram of the structure of a wind turbine blade deformation assessment device provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of an electronic device provided in some embodiments of this application.

[0019] In the diagram: 100. Wind turbine blade deformation assessment device; 101. Acquisition module; 102. First establishment module; 103. Setting module; 104. Determination module; 105. Analysis module; 106. Processing module; 107. Assessment module; 700. Electronic device; 701. Processor; 702. Memory; 703. Communication interface; 710. Bus. Detailed Implementation

[0020] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0022] It should be noted that the acquisition, storage, use, and processing of data in this application embodiment all comply with the relevant provisions of national laws and regulations.

[0023] As people become increasingly aware of environmental protection, clean energy is receiving more and more attention. Wind energy, as a clean energy source, has garnered particular interest. To fully utilize wind energy, wind turbine generators are being used more and more widely.

[0024] As components directly interacting with wind power, blades are crucial for wind turbine generators. During operation, wind turbine blades deform under wind loads, and the degree of deformation varies at different locations on the blades, making the deformation process quite complex. Therefore, a comprehensive assessment of wind turbine blade deformation is essential for guiding blade design.

[0025] Currently, existing technologies for evaluating the reliability of wind turbine blades typically focus on in-plane stiffness and strength-related indicators, such as fiber failure and interlaminar failure. However, numerous examples of wind turbine blade damage demonstrate that even when in-plane strength and stiffness meet design requirements, the blade shell frequently exhibits damage such as whitening, delamination, and fracture. This indicates that structural damage caused by out-of-plane deformation can no longer be ignored, necessitating the assessment of out-of-plane deformation to improve the comprehensiveness of wind turbine blade deformation evaluation.

[0026] Some embodiments of this application provide a method, apparatus, equipment, and product for evaluating the deformation of wind turbine blades. The method for evaluating wind turbine blade deformation is based on the basic parameter information of the wind turbine blade. A first shell element finite element model corresponding to the wind turbine blade is established. Under the boundary conditions of simulated load conditions, finite element analysis is performed on the load information and the first shell element finite element model to obtain a second shell element finite element model corresponding to the deformed wind turbine blade. The out-of-plane deformation angle of the wind turbine blade is obtained by processing the first and second shell element finite element models. The deformation of the wind turbine blade is evaluated based on the out-of-plane deformation angle and preset conditions. This scheme can measure the out-of-plane deformation of wind turbine blades, enabling a more comprehensive evaluation of the wind turbine blade deformation.

[0027] The method for evaluating wind turbine blade deformation provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0028] refer to Figure 1 This application provides a method for evaluating the deformation of wind turbine blades, which includes the following steps: S1. Obtain basic parameter information of wind turbine blades; S2. Based on the basic parameter information of the wind turbine blade, establish the first shell element finite element model corresponding to the wind turbine blade; S3. Set the simulated load conditions for the wind turbine blades; S4. Determine the load information of the wind turbine blades under simulated load conditions; S5. Under the boundary conditions of the simulated load, perform finite element analysis on the load information and the first shell element finite element model to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade. S6. Process the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade. S7. Evaluate wind turbine blade deformation based on out-of-plane deformation angle and preset conditions.

[0029] The specific implementation methods for each of the above steps are described below.

[0030] In some embodiments, in step S1, the basic parameter information of the wind turbine blade may include the shape information of the wind turbine blade (e.g., the length, width, height and root junction size of the wind turbine blade), material information, center of gravity coordinates, and the attitude of the wind turbine blade under wind load (e.g., the wind turbine blade is in a horizontal or vertical state). It should be understood that these basic parameter information all have a certain impact on the load information of the wind turbine blade under simulated load conditions.

[0031] Information about the shape of wind turbine blades can be obtained by using laser ranging principles and laser scanning to acquire information such as the length, width, height, and size of the blade root circle.

[0032] Material information for wind turbine blades can include elastic modulus, Poisson's ratio, density, and shear modulus, which can be obtained based on the properties of the specific materials used in the wind turbine blades.

[0033] In step S2, the first shell element finite element model can be a finite element model established by numerical methods specifically used to analyze thin plate and thin shell structures. It can greatly improve efficiency while ensuring calculation accuracy by simplifying the three-dimensional model into a two-dimensional element with thickness.

[0034] In some embodiments, in step S2, a first shell element finite element model corresponding to the wind turbine blade is established. Specifically, the process of establishing the first shell element finite element model may include: simplifying the wind turbine blade to obtain a simplified model of the wind turbine blade; dividing the simplified model of the wind turbine blade into several simplified elements; calculating the elastic modulus, Poisson's ratio, density, and shear modulus corresponding to each simplified element of the simplified model based on the shape information of the wind turbine blade (e.g., the length, width, height, and root junction size of the wind turbine blade), material information, and centroid coordinates, and using the coordinate data, elastic modulus, Poisson's ratio, density, and shear modulus corresponding to each simplified element as the material parameters of the first shell element finite element model.

[0035] It should be understood that the more simplified elements there are, the higher the computational complexity of the subsequent finite element analysis process. Therefore, considering both the finite element analysis processing time and the simplification accuracy of the first shell element finite element model, it is necessary to determine a suitable number of simplified elements; that is, the number of simplified elements should not be too many or too few. Specifically, the preferred range for the number of simplified elements is 6 to 20, and the optional range is 3 to 150.

[0036] In practice, the axial distance of each simplified unit of the wind turbine blade can be continuously adjusted to divide the blade until the weight parameters and center of gravity coordinates that can be analyzed are consistent with the actual weight parameters and center of gravity coordinates of the wind turbine blade obtained above, thus determining the final simplified model after division.

[0037] In practice, the model can be divided into sufficiently small simplified units, i.e., a minimum unit value is set. This is equivalent to dividing the simplified model equally and assigning a different density value to each simplified unit, thus obtaining the final simplified model after division.

[0038] Furthermore, based on the shape, material, and center-of-gravity coordinates of the wind turbine blade, the elastic modulus, Poisson's ratio, density, and shear modulus of each simplified element in the simplified model are calculated. In practice, since wind turbine blades can undergo elastic deformation, a unified isotropic constitutive model can be assigned to each simplified element, and the undetermined parameters of the model can be the elastic modulus, Poisson's ratio, density, and shear modulus. In other words, it is necessary to determine the elastic modulus, Poisson's ratio, density, and shear modulus for each simplified element individually.

[0039] In some embodiments, during the process of establishing the first shell element finite element model, geometric cleanup can be performed before mesh generation, and mesh checking can be performed after mesh generation. This allows for automatic checks on mesh quality, thereby improving mesh quality.

[0040] In step S3, the simulated load condition of the wind turbine blade can be set to the wind load condition experienced by the wind turbine blade under different operating conditions during actual operation, that is, the wind load experienced by the wind turbine blade under different operating power conditions of the wind turbine generator set. For example, it can be the wind load experienced by the wind turbine blade under the rated power condition of the wind turbine generator set, the wind load experienced by the wind turbine blade under the cut-in wind speed power condition, and the wind load experienced by the wind turbine blade under the cut-out wind speed power condition.

[0041] In some embodiments, in step S4, the load information may include gravity, acceleration, wind load, etc. It should be noted that the load information differs for different simulated load conditions. For example, for the rated power condition, the load on the wind turbine blades may include gravity, acceleration, and wind load; for the cut-off wind speed and power condition, the load on the wind turbine blades may include gravity and wind load, thereby improving the accuracy of the verification results for the transport equipment.

[0042] In addition, the load information under simulated load conditions varies not only in the type of load but also in the magnitude of each load (such as acceleration and wind load). Each simulated load condition should be set according to the actual situation.

[0043] In some embodiments, after step S4, the boundary conditions of the wind turbine blade under simulated load conditions can also be determined. Specifically, the boundary conditions may include the environmental boundary conditions and the usage boundary conditions of the wind turbine blade under simulated load conditions. The environmental boundary conditions must meet the minimum requirements specified in relevant standards (e.g., IEC standards). The usage boundary conditions of the wind turbine blade under simulated load conditions, i.e., the constraints on the wind turbine blade during use, may be the specific fixing method between the wind turbine blade and the hub in the wind turbine generator set.

[0044] In some embodiments, in step S5, the boundary conditions, load information, and first shell element finite element model obtained above can be imported into finite element software for finite element analysis to obtain the deformation state of the wind turbine blade under different simulated load conditions. After deformation, these first shell element finite element models become the corresponding second shell element finite element models.

[0045] In step S6, the out-of-plane deformation of the wind turbine blade can be the bending or torsional deformation that occurs along the normal direction of its airfoil plane when the wind turbine blade is under stress. It is one of the most common deformation forms of wind turbine blades during operation, and it is directly related to the aerodynamic performance, structural safety and power generation efficiency of the wind turbine blade.

[0046] The out-of-plane deformation angle of a wind turbine blade can refer to the angle change of the normal vector at the same location on the wind turbine blade before and after deformation.

[0047] In some embodiments, in step S6, the first shell element finite element model and the second shell element finite element model are processed to obtain the out-of-plane deformation angle of the wind turbine blade. Since the first shell element finite element model reflects the shape of the wind turbine blade before deformation, and the second shell element finite element model reflects the shape of the wind turbine blade after deformation, the out-of-plane deformation angle of each wind turbine blade after deformation under simulated load conditions can be obtained by comparing and analyzing the first shell element finite element model and the second shell element finite element model.

[0048] In some embodiments, in step S7, evaluating the wind turbine blade deformation based on the out-of-plane deformation angle and preset conditions may involve comparing the obtained out-of-plane deformation angles at different locations of the wind turbine blade with preset conditions to evaluate whether the wind turbine blade deformation at different locations meets the requirements.

[0049] In some embodiments, step S6 involves processing the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade, with reference to... Figure 2 It can include: S61. Extract the coordinate data of the key nodes in the finite element model of the first shell element, and determine the directional angle of the normal vector of the key nodes in the finite element model of the first shell element.

[0050] Key nodes refer to representative nodes in the first shell element finite element model of a wind turbine blade. For example, key nodes can be located at the connection point between two components of the wind turbine blade. The extracted key nodes should reflect the external contour of the wind turbine blade so that the out-of-plane deformation angle at the key nodes can be used to reflect the out-of-plane deformation angle of the wind turbine blade.

[0051] By extracting the coordinate data of key nodes from the first shell element finite element model for subsequent calculations, the computational load when calculating out-of-plane deformation angles can be reduced, which is beneficial to improving the efficiency of the wind turbine blade deformation assessment method.

[0052] S62. Extract the coordinate data of the key nodes in the finite element model of the second shell element, and determine the directional angle of the normal vector of the key nodes in the finite element model of the second shell element.

[0053] By extracting the coordinate data of key nodes from the second shell element finite element model, it is possible to calculate and determine the directional angle of the normal vectors of these key nodes after deformation (i.e., in the second shell element finite element model).

[0054] S63. Obtain the angle of change of the directional normal vector of the key node in the first shell element finite element model and the angle of change of the directional normal vector in the second shell element finite element model, and use the angle of change as the out-of-plane deformation angle of the wind turbine blade.

[0055] By obtaining the angle of the normal vector of the key node in the first shell element finite element model and the angle of change of the angle of the normal vector in the second shell element finite element model, the change of the angle of the normal vector of the key node in the wind turbine blade before and after deformation can be known.

[0056] By taking the angle between the directional angles of the normal vectors of the key nodes in the first shell element finite element model and the angle between the directional angles of the normal vectors of the second shell element finite element model as the out-of-plane deformation angle of the wind turbine blade, the deformation of the wind turbine blade can be evaluated using the out-of-plane deformation angle of the wind turbine blade.

[0057] In some embodiments, the principle for calculating the directional angle of the normal vector is as follows: Assume A, B, and C are three adjacent critical nodes in the first shell element finite element model of the wind turbine blade before deformation, and the three critical nodes form a corner. and The directed angle between them is θ1; the three adjacent key nodes in the finite element model of the second shell element after the wind turbine blade deformation are A', B', and C', and the three key nodes form an angle. and The directed angle between them is θ2, and the two angles are calculated as follows: The change angle of the directional angle of the normal vector in the first shell element finite element model and the second shell element finite element model is expressed as θ = θ2 - θ1. The change angle is taken as the out-of-plane deformation angle of the wind turbine blade.

[0058] In some embodiments, some key nodes are located in the region of maximum deformation in the first shell element finite element model.

[0059] Some key nodes are located in the maximum deformation region in the first shell element finite element model. For example, some of the extracted key nodes are located in the currently known large deformation region of the wind turbine blade, so that the out-of-plane deformation angle, which is used as the evaluation index for evaluating the deformation of the wind turbine blade, can cover the currently known large deformation region.

[0060] In some embodiments, a wind turbine blade includes multiple interconnected blade substructures, and the basic parameter information of the wind turbine blade includes the shape information, material information, and center of gravity coordinates of the multiple blade substructures.

[0061] The blade substructure can be a part of the structure of a wind turbine blade. Since a wind turbine blade is formed by connecting multiple structural parts, and the materials of each structural part can be different, the basic parameter information of each structural part can be different.

[0062] The basic parameter information of a wind turbine blade includes the shape information, material information, and center of gravity coordinates of multiple blade substructures. In other words, the basic parameter information of a wind turbine blade is the basic parameter information of each blade substructure, namely the shape information, material information, and center of gravity coordinates of each blade substructure.

[0063] By setting the wind turbine blade as a series of interconnected blade substructures, and setting the basic parameter information of the wind turbine blade as including the shape information, material information and center of gravity coordinates of the multiple blade substructures, the shape information, material information and center of gravity coordinates of each blade substructure can be set individually in the future.

[0064] In some embodiments, reference Figure 3 Step S2 may include: S21. Perform equivalent processing on multiple blade substructures in the wind turbine blade to obtain a simplified model of the blade substructure.

[0065] In step S21 above, performing equivalent processing on multiple blade substructures in the wind turbine blade can mean performing equivalent processing on each blade substructure to obtain a simplified model of each blade substructure. This is beneficial to improving the efficiency of subsequent finite element analysis and improving the efficiency of the wind turbine blade deformation assessment method.

[0066] S22. Divide the simplified model of the blade substructure into several simplified units.

[0067] Since the number of simplified elements has a direct impact on the computational complexity of the subsequent finite element analysis process, in step S22 above, the number of simplified elements into which the simplified model of each blade substructure is divided should not be too many or too few.

[0068] S23. Based on the shape information, material information and center of gravity coordinates of each blade substructure, calculate the elastic modulus, Poisson's ratio, density and shear modulus of each simplified unit of the simplified model of each blade substructure, and use the coordinate data and elastic modulus of each simplified unit as the first shell element finite element model.

[0069] Since the shape, material, and center of gravity coordinates of each blade substructure are set individually and are different, the coordinate data, elastic modulus, Poisson's ratio, density, and shear modulus of each simplified element of the simplified model of each blade substructure are calculated based on the shape, material, and center of gravity coordinates of each blade substructure as the first shell element finite element model.

[0070] In some embodiments, the blade substructure includes a main beam, a web, a core material, and an auxiliary beam.

[0071] The blade substructure includes the main spars, web, core material, and auxiliary spars. It can refer to the overall structure of a wind turbine blade consisting of these interconnected components. Furthermore, each of the main spars, web, core material, and auxiliary spars is treated as a separate blade substructure, with its own shape information, material information, and center of gravity coordinates.

[0072] In some embodiments, reference Figure 4 Step S5 includes: S51. Under the boundary conditions of the simulated load, perform finite element analysis on the load information and the first shell element finite element model to obtain the displacement data of the first shell element finite element model.

[0073] In step S51 above, the boundary conditions, load information, and first shell element finite element model obtained above are imported into finite element software for finite element analysis to simulate the deformation of wind turbine blades under different simulated load conditions, so as to obtain the displacement data of the first shell element finite element model.

[0074] S52. Obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade based on the displacement data.

[0075] In step S52 above, by adding the displacement data of the first shell element finite element model to the first shell element finite element model, the second shell element finite element model corresponding to the deformation of the wind turbine blade can be obtained.

[0076] In some embodiments, the method for assessing wind turbine blade deformation further includes the following steps: S64. Normalize the out-of-plane deformation angle of the wind turbine blade.

[0077] By normalizing the out-of-plane deformation angle of wind turbine blades, the out-of-plane deformation angle can be mapped to a standard numerical range, which can eliminate the confusion of angle values ​​caused by differences in calculation or direction definition, ensure the uniqueness and comparability of the results, and facilitate accurate evaluation of the magnitude of the out-of-plane deformation angle.

[0078] For example, before step S7, step S64 is also required so that the wind turbine blade deformation can be accurately assessed in the subsequent assessment.

[0079] In some embodiments, the preset condition can be a preset out-of-plane deformation angle, which can be a preset out-of-plane deformation angle at various positions of the wind turbine blade. The aforementioned step S7 can be: comparing the out-of-plane deformation angle with the preset out-of-plane deformation angle; if the out-of-plane deformation angle is less than or equal to the preset out-of-plane deformation angle, then the wind turbine blade deformation meets the requirements; if the out-of-plane deformation angle is greater than the preset out-of-plane deformation angle, then the wind turbine blade deformation does not meet the requirements.

[0080] The out-of-plane deformation angle can be the out-of-plane deformation angle at various locations of the wind turbine blade obtained in step S6. By comparing the out-of-plane deformation angle at each location of the wind turbine blade obtained in step S6 with the preset out-of-plane deformation angle at the corresponding location, if there is an out-of-plane deformation angle greater than the preset out-of-plane deformation angle, it is determined that the deformation of the wind turbine blade cannot meet the requirements; if the out-of-plane deformation angle at each location is less than or equal to the preset out-of-plane deformation angle, it is determined that the deformation of the wind turbine blade meets the requirements.

[0081] Some embodiments of this application also provide a wind turbine blade deformation assessment device 100, see reference. Figure 5 The wind turbine blade deformation assessment device 100 is used to assess the deformation of wind turbine blades using the wind turbine blade deformation assessment method provided by the above-mentioned technical solution. The wind turbine blade deformation assessment device 100 includes: Module 101 is used to acquire basic parameter information of wind turbine blades; The first module 102 establishes a first shell element finite element model of the wind turbine blade based on the basic parameter information of the wind turbine blade. The setting module 103 is used to set the simulated load conditions of the wind turbine blades; Module 104 is used to determine the load information of the wind turbine blade under simulated load conditions; Analysis module 105 is used to perform finite element analysis on load information and the first shell element finite element model under the boundary conditions of simulated load conditions, so as to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade. The processing module 106 is used to process the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade. Evaluation module 107 is used to evaluate the deformation of wind turbine blades based on out-of-plane deformation angles and preset conditions.

[0082] In some embodiments, the acquisition module 101 may include a laser scanning device for acquiring the shape information of the wind turbine blade, and a device for acquiring information such as the material information and center of gravity coordinates of the wind turbine blade.

[0083] The first module 102 is specifically used to perform equivalent processing on the wind turbine blade to obtain a simplified model of the wind turbine blade; the simplified model of the wind turbine blade is divided into several simplified elements; based on the shape information of the wind turbine blade (e.g., the length, width, height and root junction size of the wind turbine blade), material information, and center of gravity coordinates, the elastic modulus, Poisson's ratio, density and shear modulus corresponding to each simplified element of the simplified model are calculated respectively, and the coordinate data, elastic modulus, Poisson's ratio, density and shear modulus corresponding to each simplified element are used as the material parameters of the first shell element finite element model.

[0084] The determination module 104 is specifically used to determine the load information corresponding to different simulated load conditions. For example, for the rated power condition, the load on the wind turbine blades may include gravity, acceleration, and wind load; for the cut-off wind speed and power condition, the load on the wind turbine blades may include gravity and wind load, thereby improving the accuracy of the verification results of the transport tooling. In addition, besides the different types of loads, the magnitudes of each load (such as acceleration and wind load) also differ under the simulated load conditions, and each simulated load condition must be set according to the actual situation.

[0085] The evaluation module 107 is specifically used to compare the out-of-plane deformation angle at different positions of the wind turbine blade with the preset out-of-plane deformation angle to determine whether the deformation of the wind turbine blade meets the requirements.

[0086] It should be noted that, for ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0087] The apparatus described above is used to implement the wind turbine blade deformation assessment method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0088] Based on the same technical concept, corresponding to any of the above embodiments, this application also provides an electronic device.

[0089] Figure 6 A schematic diagram of a more specific electronic device hardware structure provided in this embodiment is shown.

[0090] The electronic device 700 may include a processor 701 and a memory 702 storing computer program instructions.

[0091] Specifically, the processor 701 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0092] Memory 702 may include mass storage for data or instructions. For example, and not limitingly, memory 702 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 702 may include removable or non-removable (or fixed) media. Where appropriate, memory 702 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 702 is non-volatile solid-state memory.

[0093] In certain embodiments, the memory may include read-only memory (ROM), random access memory (RAM), disk storage media devices, optical storage media devices, flash memory devices, and electrical, optical, or other physical / tangible memory storage devices. Thus, typically, memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of this application.

[0094] The processor 701 reads and executes computer program instructions stored in the memory 702 to implement any of the wind turbine blade deformation assessment methods in the above embodiments.

[0095] In some examples, the electronic device 700 may also include a communication interface 703 and a bus 710. For example, Figure 6 As shown, the processor 701, memory 702, and communication interface 703 are connected through bus 710 and complete communication with each other.

[0096] The communication interface 703 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0097] Bus 710 includes hardware, software, or both, that couples components of an online data traffic metering device together. For example, and not as a limitation, bus 710 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 710 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0098] For example, the electronic device 700 can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc.

[0099] Based on the same technical concept, corresponding to any of the methods in the above embodiments, this application also provides a non-transitory computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when executed by a processor, these computer program instructions implement any of the wind turbine blade deformation evaluation methods in the above embodiments. Examples of computer-readable storage media include non-transitory computer-readable storage media, such as portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, etc.

[0100] Based on the same technical concept, corresponding to any of the above-described embodiments, this application also provides a computer program product, which includes computer program instructions. In some embodiments, the computer program instructions can be executed by one or more processors of a computer to cause the computer and / or processor to perform a method for evaluating wind turbine blade deformation. The corresponding execution entities for each step in each embodiment of the wind turbine blade deformation evaluation method, and the processors executing the corresponding steps, can belong to the corresponding execution entities.

[0101] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0102] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0103] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0104] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0105] The above are merely specific embodiments of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A method for evaluating the deformation of wind turbine blades, characterized in that, include: Obtain basic parameter information of wind turbine blades; Based on the basic parameter information of the wind turbine blade, a first shell element finite element model corresponding to the wind turbine blade is established; Set the simulated load conditions for the wind turbine blades; Determine the load information of the wind turbine blade under simulated load conditions; Under the boundary conditions of the simulated load condition, finite element analysis is performed on the load information and the first shell element finite element model to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade. The first shell element finite element model and the second shell element finite element model are processed to obtain the out-of-plane deformation angle of the wind turbine blade. The deformation of the wind turbine blade is evaluated based on the out-of-plane deformation angle and preset conditions.

2. The method for evaluating wind turbine blade deformation according to claim 1, characterized in that, The step of processing the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade includes: Extract the coordinate data of key nodes in the first shell element finite element model, and determine the directional angle of the normal vector of the key node in the first shell element finite element model; Extract the coordinate data of the key node in the second shell element finite element model, and determine the directional angle of the normal vector of the key node in the second shell element finite element model; The angles of the directional angles of the normal vectors of the key nodes in the first shell element finite element model and the angles of the directional angles of the normal vectors in the second shell element finite element model are obtained, and the angles of these changes are used as the out-of-plane deformation angles of the wind turbine blades.

3. The method for evaluating wind turbine blade deformation according to claim 2, characterized in that, Some of the key nodes are located in the maximum deformation region of the first shell element finite element model.

4. The method for evaluating wind turbine blade deformation according to claim 1, characterized in that, The wind turbine blade includes multiple interconnected blade substructures, and the basic parameter information of the wind turbine blade includes the shape information, material information and center of gravity coordinates of the multiple blade substructures. The step of establishing a first shell element finite element model of the wind turbine blade based on its basic parameter information includes: The multiple blade substructures in the wind turbine blade are subjected to equivalent processing to obtain a simplified model of the blade substructure; The simplified model of the blade substructure is divided into several simplified units; Based on the shape information, material information, and center of gravity coordinates of each blade substructure, the elastic modulus, Poisson's ratio, density, and shear modulus of each simplified unit of the simplified model of each blade substructure are calculated, and the coordinate data and elastic modulus of each simplified unit are used as the first shell element finite element model.

5. The method for evaluating wind turbine blade deformation according to claim 4, characterized in that, The blade substructure includes a main beam, a web, a core material, and auxiliary beams.

6. The method for evaluating wind turbine blade deformation according to claim 1, characterized in that, The step of performing finite element analysis on the load information and the first shell element finite element model under the boundary conditions of the simulated load condition to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade includes: Under the boundary conditions of the simulated load condition, finite element analysis is performed on the load information and the first shell element finite element model to obtain the displacement data of the first shell element finite element model. The second shell element finite element model corresponding to the deformation of the wind turbine blade is obtained based on the displacement data.

7. The method for evaluating wind turbine blade deformation according to claim 1, characterized in that, The method for assessing wind turbine blade deformation also includes: The out-of-plane deformation angle of the wind turbine blade is normalized.

8. The method for evaluating wind turbine blade deformation according to claim 1, characterized in that, The preset condition is a preset out-of-plane deformation angle. The step of evaluating the wind turbine blade deformation based on the out-of-plane deformation angle and the preset condition is as follows: compare the out-of-plane deformation angle with the preset out-of-plane deformation angle. If the out-of-plane deformation angle is less than or equal to the preset out-of-plane deformation angle, the wind turbine blade deformation meets the requirements. If the out-of-plane deformation angle is greater than the preset out-of-plane deformation angle, the wind turbine blade deformation does not meet the requirements.

9. A device for evaluating the deformation of wind turbine blades, characterized in that, The wind turbine blade deformation assessment device includes: The acquisition module is used to acquire basic parameter information of wind turbine blades; The first module establishes a first shell element finite element model of the wind turbine blade based on the basic parameter information of the wind turbine blade. The setting module is used to set the simulated load conditions of the wind turbine blades; The determination module is used to determine the load information of the wind turbine blade under simulated load conditions; The analysis module is used to perform finite element analysis on the load information and the first shell element finite element model under the boundary conditions of the simulated load condition, so as to obtain the second shell element finite element model corresponding to the deformation of the wind turbine blade. The processing module is used to process the first shell element finite element model and the second shell element finite element model to obtain the out-of-plane deformation angle of the wind turbine blade. The evaluation module is used to use the out-of-plane deformation angle as an evaluation index for the deformation of the wind turbine blade.

10. An electronic device, characterized in that, The electronic device includes: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, it implements the wind turbine blade deformation assessment method as described in any one of claims 1-8.

11. A computer program product, characterized in that, When the instructions in the computer program product are executed by the processor of the electronic device, the electronic device performs the wind turbine blade deformation assessment method as described in any one of claims 1-8.

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