Simulation methods, devices, equipment, and media for the impact of cold waves on wind turbine blades.

Abstract

This disclosure relates to a simulation method, apparatus, equipment, and medium for the impact of cold waves on wind turbine blades. By constructing a fluid-structure interaction (FSI) model of the solid domain of the wind turbine blade and the flow field domain of the cold wave airflow, and solving the FSI model based on the boundary conditions determined by various preset meteorological parameters of the cold wave airflow, the structural response of the wind turbine blade under the influence of the cold wave airflow is obtained. This allows for accurate assessment of the stress and deformation of the wind turbine blade under the influence of cold wave weather, providing a scientific basis for the design and maintenance of wind turbine blades.

Description

Technical Field

[0001] This disclosure relates to the field of wind power generation technology, and in particular to a simulation method, apparatus, equipment and medium for the impact of cold waves on wind turbine blades. Background Technology

[0002] As an extreme weather phenomenon, cold waves have a significant impact on the normal operation and performance of wind turbine generators. During cold wave events, wind turbine blades not only have to withstand the dual challenges of extreme low temperatures and wind speed changes, but may also face complex situations such as snow and ice cover. For example, extreme low temperatures can cause changes in the physical properties of wind turbine blade materials, such as changes in the elastic modulus and coefficient of thermal expansion, which may increase the stress and deformation of the blades. Rapid changes in wind speed may cause fluctuations in the aerodynamic loads on the blades, increasing the risk of blade vibration and fatigue damage. Strong winds continuously apply dynamic loads to the wind turbine blades, causing deformation and structural vibration of the blades and even the entire turbine. Snow and ice cover will significantly increase the weight of the blades, change the aerodynamic characteristics of the blades, and lead to aerodynamic imbalance and additional mechanical stress.

[0003] In summary, the impact of cold waves on wind turbine blades is multifaceted, and assessing the impact of cold wave weather on wind turbine blades is crucial. Currently, no relevant technical solutions have been found for assessing the impact of cold wave weather on wind turbine blades. Summary of the Invention

[0004] To address the aforementioned technical issues, this disclosure provides a simulation method, apparatus, equipment, and medium for the impact of cold waves on wind turbine blades.

[0005] The first aspect of this disclosure provides a simulation method for the impact of cold waves on wind turbine blades, including:

[0006] Create the solid domain of the wind turbine blades and the flow field domain of the effect of the target cold wave airflow on the wind turbine blades;

[0007] Mesh the solid domain and the flow field domain separately to obtain the solid domain mesh model corresponding to the solid domain and the flow field domain mesh model corresponding to the flow field domain.

[0008] By coupling the solid domain mesh model and the flow field mesh model, a fluid-structure interaction model corresponding to the wind turbine blade is constructed.

[0009] Based on the cold wave thresholds corresponding to the preset meteorological parameters of the target cold wave airflow, the boundary conditions of the fluid-structure interaction model are determined.

[0010] By inputting boundary conditions into the fluid-structure interaction model, the simulation data of the target flow field of the flow field domain mesh model under the boundary conditions and the target structural response data of the solid domain mesh model under the action of the target flow field simulation data are calculated.

[0011] The structural response data of the target structure are analyzed to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow.

[0012] A second aspect of this disclosure provides a simulation device for the impact of cold waves on wind turbine blades, comprising:

[0013] Create a module to create the solid domain of the wind turbine blades and the flow field domain that reflects the effect of the target cold wave airflow on the wind turbine blades;

[0014] The meshing module is used to mesh the solid domain and the flow domain respectively, to obtain the solid domain mesh model corresponding to the solid domain and the flow domain mesh model corresponding to the flow domain.

[0015] The coupling module is used to couple the solid domain mesh model and the flow field domain mesh model to construct the fluid-structure interaction model corresponding to the wind turbine blade;

[0016] The first determining module is used to determine the boundary conditions of the fluid-structure interaction model based on the cold wave threshold corresponding to each preset meteorological parameter of the target cold wave airflow.

[0017] The calculation module is used to input boundary conditions into the fluid-structure interaction model and calculate the target flow field simulation data of the flow field domain mesh model and the target structure response data of the solid domain mesh model under the action of the target flow field simulation data.

[0018] The analysis module is used to analyze the target structure response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow.

[0019] A third aspect of this disclosure provides a computer device including a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, can implement the simulation method of the first aspect regarding the impact of cold waves on wind turbine blades.

[0020] The fourth aspect of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the simulation method for the impact of cold waves on wind turbine blades described in the first aspect.

[0021] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0022] This disclosure involves creating a solid domain for the wind turbine blades and a flow field domain for the influence of a target cold wave airflow on the wind turbine blades; meshing the solid domain and flow field domain separately to obtain a solid domain mesh model and a flow field domain mesh model; coupling the solid domain mesh model and the flow field domain mesh model to construct a fluid-structure interaction (FSI) model for the wind turbine blades; determining the boundary conditions of the FSI model based on the cold wave thresholds corresponding to various preset meteorological parameters of the target cold wave airflow; inputting the boundary conditions into the FSI model to calculate the target flow field simulation data of the flow field domain mesh model and the target structural response data of the solid domain mesh model under the action of the target flow field simulation data; and analyzing the target structural response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow. This disclosure constructs a fluid-structure interaction model of the solid domain of the wind turbine blade and the flow field domain of the cold wave airflow. Based on the boundary conditions determined by the preset meteorological parameters of the cold wave airflow, the fluid-structure interaction model is solved to obtain the structural response results of the wind turbine blade under the influence of the cold wave airflow. This can accurately assess the stress and deformation of the wind turbine blade under the influence of cold wave weather, providing a scientific basis for the design and maintenance of wind turbine blades. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a flowchart of a simulation method for the impact of cold waves on wind turbine blades provided in an embodiment of this disclosure;

[0026] Figure 2 This is a flowchart of another simulation method for the impact of cold waves on wind turbine blades provided in this embodiment of the disclosure;

[0027] Figure 3 This is a schematic diagram of the structure of a simulation device for the impact of cold waves on wind turbine blades provided in an embodiment of this disclosure;

[0028] Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of this disclosure. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0030] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0031] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0032] 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 one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0034] The simulation method for the impact of cold waves on wind turbine blades provided in this disclosure can be executed by a computer device. This device can be understood as any device with processing and computing capabilities. This device can include, but is not limited to, mobile terminals such as smartphones, laptops, tablets (PADs), and wearable devices, as well as fixed electronic devices such as digital TVs and desktop computers.

[0035] To better understand the inventive concept of the embodiments of this disclosure, the technical solutions of the embodiments of this disclosure will be described below in conjunction with exemplary embodiments.

[0036] Figure 1This is a flowchart illustrating a simulation method for the impact of cold waves on wind turbine blades, provided in an embodiment of this disclosure. This method can be executed by a computer device, such as... Figure 1 As shown in the figure, the simulation method for the impact of cold waves on wind turbine blades provided in this embodiment includes the following steps:

[0037] Step 110: Create the solid domain of the wind turbine blades and the flow field domain of the effect of the target cold wave airflow on the wind turbine blades.

[0038] In this embodiment of the disclosure, the wind turbine blades are blades of a wind turbine generator. A computer device can create the solid domain of the wind turbine blades and the flow field domain representing the influence of the target cold wave airflow on the wind turbine blades. For example, the solid domain of the wind turbine blades and the flow field domain representing the influence of the target cold wave airflow on the wind turbine blades can be created in Ansys software.

[0039] In some embodiments, creating the solid domain of the wind turbine blades may include S11-S15:

[0040] S11. Obtain the shape parameters of the wind turbine blades.

[0041] S12. Obtain the geometric data of different cross sections contained in the wind turbine blades from the shape parameters.

[0042] The geometric data of the cross-section of a wind turbine blade can include the blade height, chord length, installation angle, and center of the installation angle.

[0043] S13. Based on the geometric data of each section, connect the geometric bodies to which each section belongs to generate a three-dimensional structural model of the wind turbine blade.

[0044] S14. Identify the preset shape region on the surface of the three-dimensional structural model, wherein the influence of the cold wave airflow on the preset shape region is less than the preset threshold.

[0045] In wind turbine blades, there may be some tiny chamfers or small protrusions in non-critical parts. Chamfers are usually used to avoid stress concentration caused by sharp edges or to facilitate manufacturing and installation. Small protrusions include markings, sensor mounting bases, etc.

[0046] In this embodiment of the disclosure, the preset shape region may include a small chamfer or a small protrusion in a non-critical part of the three-dimensional structural model of the wind turbine blade. The influence of these chamfers or small protrusions on the fluid-structure interaction characteristics of the wind turbine blade under the influence of cold waves can be ignored.

[0047] The preset threshold can be set as needed; no limit is set here.

[0048] S15. Remove the preset shape region from the three-dimensional structural model to obtain the solid domain corresponding to the wind turbine blade.

[0049] During the modeling process, computer equipment can remove preset shape areas (small chamfers and small protrusions in non-critical parts) from the three-dimensional structural model of the wind turbine blade to simplify the model. This reduces the complexity of the model, lowers the amount of computation and computational cost, improves computational efficiency, and also improves the accuracy of subsequent calculation results.

[0050] In some embodiments, creating the flow field domain that influences the target cold wave airflow on the wind turbine blades may include S21-S24:

[0051] S21. Based on the shape parameters of the wind turbine blades, determine the diameter of the rotating surface of the wind turbine blades.

[0052] The diameter of the rotating surface is the diameter of the rotating surface formed by the rotation of the fan blades in one revolution, and it is usually the sum of the lengths of the two fan blades.

[0053] S22. In the spanwise direction of the wind turbine blade, the product of a first preset multiple and the diameter of the rotating surface of the wind turbine blade is determined as the first length, and the product of a second preset multiple and the diameter of the rotating surface of the wind turbine blade is determined as the first width.

[0054] S23. In a plane perpendicular to the spanwise direction, the product of the third preset multiple and the diameter of the rotating surface of the wind turbine blade is determined as the first height.

[0055] The first, second, and third preset multipliers can be set as needed, for example, from 10 to 15, without any limitation here.

[0056] S24. Multiply the first length, first width and first height to obtain the flow field region of the target cold wave airflow on the wind turbine blades.

[0057] In some embodiments, creating the flow field domain that influences the target cold wave airflow on the wind turbine blades may include S31-S33:

[0058] S31. Based on the shape parameters of the wind turbine blades, determine the boundary region of the wind turbine blades.

[0059] S32. Expand the boundary area outward by a preset range to obtain the target area.

[0060] In this embodiment of the disclosure, the preset range can be set as needed, and is not limited here.

[0061] S33. Combine the boundary region and the target region to obtain the flow field domain of the impact of the target cold wave airflow on the wind turbine blades.

[0062] In some embodiments, the diffusion range of the target cold wave airflow can be calculated based on the wind speed, wind direction and temperature of the target cold wave airflow, and the diffusion range including the wind turbine blades can be determined as the flow field region of the influence of the target cold wave airflow on the wind turbine blades.

[0063] It should be noted that the flow field domain for the influence of the target cold wave airflow on the wind turbine blades determined by the above method should be large enough to include the wind turbine blades and accurately simulate the interaction between the cold wave airflow and the wind turbine, so as to avoid the influence of the boundary on the simulation results.

[0064] Step 120: Perform mesh generation on the solid domain and the flow field domain respectively to obtain the solid domain mesh model corresponding to the solid domain and the flow field domain mesh model corresponding to the flow field domain.

[0065] In this embodiment of the disclosure, after obtaining the solid domain of the wind turbine blade and the flow field domain of the target cold wave airflow affecting the wind turbine blade, the computer device can perform mesh division on the solid domain to obtain the solid domain mesh model corresponding to the solid domain, and perform mesh division on the flow field domain to obtain the flow field domain mesh model corresponding to the flow field domain.

[0066] The solid domain mesh model is also known as the Mechanical module, and the flow field mesh model is also known as the Fluent module.

[0067] In some embodiments, the size of each grid cell in the flow field mesh model is positively correlated with the distance between the center of the grid cell and the boundary of the wind turbine blade. That is, the smaller the distance between the center of the grid cell and the boundary of the wind turbine blade, the smaller the grid cell; and the larger the distance between the center of the grid cell and the boundary of the wind turbine blade, the larger the grid cell. In other words, in the flow field mesh model, the grid cells closer to the wind turbine blade are smaller and more numerous, while the grid cells farther away from the wind turbine blade are larger and fewer. Therefore, the number of grid cells can be reduced while meeting the requirements of computational accuracy, thereby reducing the amount of computation and improving the computational speed.

[0068] Step 130: Couple the solid domain mesh model and the flow field mesh model to construct the fluid-structure interaction model corresponding to the wind turbine blade.

[0069] In this embodiment of the disclosure, the computer device can connect the solid domain mesh model and the flow field mesh model through a fluid-structure interaction interface, couple the solid domain mesh model and the flow field mesh model, construct the fluid-structure interaction model corresponding to the wind turbine blade, and realize the data transfer between the flow field mesh model and the solid domain mesh model.

[0070] For example, a fluid-structure interaction model of the wind turbine blades can be built in Workbench of Ansys software.

[0071] Step 140: Determine the boundary conditions of the fluid-structure interaction model based on the cold wave thresholds corresponding to the preset meteorological parameters of the target cold wave airflow.

[0072] In this embodiment of the disclosure, the preset meteorological parameters for the cold wave airflow may include parameters such as temperature, wind speed, and wind direction. The preset meteorological parameters can be set as needed, and are not limited here.

[0073] The cold wave threshold corresponding to temperature is the lowest temperature, the cold wave threshold corresponding to wind speed is the maximum wind speed, and the cold wave threshold corresponding to wind direction is the wind direction with the maximum wind speed.

[0074] Computer equipment can determine the boundary conditions of a fluid-structure interaction model based on the cold wave thresholds corresponding to the preset meteorological parameters of the target cold wave airflow.

[0075] In some embodiments, determining the boundary conditions of the fluid-structure interaction model based on the cold wave thresholds corresponding to various meteorological parameters of the target cold wave airflow may include steps 1401-1404:

[0076] Step 1401: Determine the target cold wave type to which the target cold wave airflow belongs.

[0077] Cold wave types can include ordinary cold waves, strong cold waves, and extremely strong cold waves.

[0078] A common cold wave is a cold air mass that causes the daily minimum temperature in a certain area to drop by 8°C or more within 24 hours, or by 10°C or more within 48 hours, or by 12°C or more within 72 hours, and causes the daily minimum temperature in that area to drop to 4°C or below.

[0079] Strong cold wave: A cold air mass that causes the daily minimum temperature in a certain area to drop by more than or equal to 10°C within 24 hours, or by more than or equal to 12°C within 48 hours, or by more than or equal to 14°C within 72 hours, and causes the daily minimum temperature in that area to drop to 2°C or below.

[0080] Extreme cold wave: A cold air mass that causes the daily minimum temperature in a certain area to drop by more than or equal to 12°C within 24 hours, or by more than or equal to 14°C within 48 hours, or by more than or equal to 16°C within 72 hours, and causes the daily minimum temperature in that area to drop to 0°C or below.

[0081] In this embodiment of the disclosure, the computer device can determine the target cold wave type of the target cold wave airflow based on the cold wave type of the target cold wave airflow input by the user.

[0082] Step 1402: Obtain the variation range of each preset meteorological parameter corresponding to the target cold wave type.

[0083] In this embodiment of the disclosure, the computer device pre-stores the variation range of various meteorological parameters corresponding to each type of cold wave, including the variation range of temperature, wind speed, and wind direction. For example, the variation range of each meteorological parameter corresponding to each type of cold wave can be determined based on information from historical cold wave events or based on user settings; no limitation is made here.

[0084] Computer equipment can obtain the range of changes in various preset meteorological parameters corresponding to the target cold wave type.

[0085] Step 1403: For each preset meteorological parameter, obtain the cold wave threshold corresponding to the preset meteorological parameter from the range of variation of the preset meteorological parameter.

[0086] In this embodiment of the disclosure, for each preset meteorological parameter of the target cold wave airflow, the computer device can obtain the cold wave threshold corresponding to the preset meteorological parameter from the range of variation of the preset meteorological parameter.

[0087] The cold wave threshold may include at least one of the following: minimum temperature, maximum wind speed, and wind direction corresponding to the maximum wind speed.

[0088] For example, when the preset meteorological parameter is the temperature of the target cold wave airflow, the corresponding cold wave threshold is the lowest temperature in the temperature variation range;

[0089] When the preset meteorological parameter is the wind speed of the target cold wave airflow, the corresponding cold wave threshold is the maximum wind speed in the range of wind speed variation;

[0090] When the preset meteorological parameters are the wind direction of the target cold wave airflow, the corresponding cold wave threshold is the wind direction corresponding to the maximum wind speed within the range of wind direction changes.

[0091] Step 1404: Determine the cold wave threshold corresponding to each preset meteorological parameter as the inlet boundary condition of the fluid-structure interaction model, set the outlet boundary condition of the fluid-structure interaction model as a free outflow condition, and set the side boundary condition and top boundary condition of the fluid-structure interaction model as symmetrical boundary conditions.

[0092] In this embodiment of the present disclosure, the computer device can determine the cold wave threshold corresponding to each preset meteorological parameter of the target cold wave airflow as the inlet boundary condition of the fluid-structure interaction model, set the outlet boundary condition of the fluid-structure interaction model as a free outflow condition, and set the side boundary condition and top boundary condition of the fluid-structure interaction model as symmetrical boundary conditions.

[0093] Symmetric boundary conditions can be understood as setting a plane of symmetry in the model, where the displacement of nodes on this plane in the normal direction and their rotation about the axis of symmetry are constrained; that is, movement outside the plane of symmetry and rotation within the plane of symmetry are not allowed. This means that nodes on the plane of symmetry can only move within its plane and cannot cross the plane of symmetry. Symmetric boundary conditions can reduce the computational cost of simulations.

[0094] Step 150: Input the boundary conditions into the fluid-structure interaction model, and calculate the target flow field simulation data of the flow field domain mesh model and the target structure response data of the solid domain mesh model under the action of the target flow field simulation data.

[0095] In this embodiment of the disclosure, the computer device can input boundary conditions into the fluid-structure interaction model to calculate the target flow field simulation data of the flow field domain mesh model under the boundary conditions and the target structural response data of the solid domain mesh model under the action of the target flow field simulation data.

[0096] Specifically, based on the parameters in the boundary conditions, the initial values ​​of the parameters corresponding to the target cold wave airflow in the flow field domain mesh model can be determined. The initial values ​​can include parameters such as air velocity, air pressure, and air density. The k-om-SST model is selected as the turbulence model, the viscous heating term is enabled, the number of calculation iteration steps is set, and the initial values ​​are substituted into the continuity equation, momentum equation, and energy equation of the air flow field calculation based on a preset solver (such as a density-based solver) to obtain the flow field simulation data of the flow field domain mesh model under the boundary conditions. Then, the flow field simulation data is input into the solid domain mesh model, and the structural response data of the fan blades under the action of the target flow field simulation data is solved in the solid domain mesh model. The structural response data is then fed back to the flow field domain mesh model to update the boundary conditions of the flow field domain mesh model. Through repeated iterations, until the preset convergence rule is met, a stable target fluid-structure interaction solution is obtained. The flow field simulation data in the target fluid-structure interaction solution is determined as the target flow field simulation data, and the structural response data in the target fluid-structure interaction solution is determined as the target structural response data.

[0097] The continuity equation, momentum equation, and energy equation for airflow field calculations are all established based on the laws of conservation of mass and energy of fluids. The continuity equation is a mathematical expression for the conservation of fluid mass, independent of fluid properties, viscosity, and external forces. The momentum equation is a mathematical expression derived by applying Newton's second law to a moving fluid; that is, at any given instant, the rate of change of fluid momentum with respect to time is equal to the resultant force of all external forces acting on the system at that instant. The energy equation, based on the first law of thermodynamics, establishes a mathematical expression for fluid mechanics by considering the various energies flowing into a particle per unit time and the work done by external forces.

[0098] For example, the continuity equation for calculating the airflow field can be expressed as equation (1):

[0099]

[0100] The momentum equation for calculating the airflow field can be expressed as equation (2):

[0101]

[0102] The energy equation for calculating the airflow field can be expressed as equation (3):

[0103]

[0104] Where ρ is air density; u is the velocity component of the airflow field along the x-axis; v is the velocity component of the airflow field along the y-axis; p is air pressure; and μ is the air molecule viscosity coefficient. This represents the Reynolds stress.

[0105] The target flow field simulation data can include data such as the flow field velocity, flow field pressure, and flow field temperature distribution of the target cold wave airflow.

[0106] The target structural response data can include the force data, displacement data, and structural change data of the wind turbine blades under the influence of the target cold wave airflow.

[0107] In some embodiments, inputting boundary conditions into the fluid-structure interaction model and calculating the target flow field simulation data of the flow field domain mesh model and the target structural response data of the solid domain mesh model under the action of the target flow field simulation data may include steps 1501-1503:

[0108] Step 1501: Input the boundary conditions into the fluid-structure interaction model, solve the flow field domain mesh model in the fluid-structure interaction model, and obtain the first flow field simulation data of the flow field domain mesh model under the boundary conditions.

[0109] Step 1502: Transfer the first flow field simulation data to the solid domain mesh model, solve the solid domain mesh model, and obtain the first structural response data of the solid domain mesh model under the action of the first flow field simulation data.

[0110] Step 1503: Feed the first structural response data back to the flow field domain mesh model, update the flow field domain mesh model based on the first structural response data, iteratively solve the flow field domain mesh model and the solid domain mesh model until the flow field simulation data and structural response data converge, and obtain the target flow field simulation data and the target structural response data.

[0111] In this embodiment of the disclosure, since the deformation of the wind turbine blades in the structural response data will affect the flow field domain of the target cold wave airflow, and thus affect the boundary of the flow field domain mesh model, it is necessary to update the flow field domain mesh model according to the structural response data, and then iteratively solve the flow field domain mesh model and the solid domain mesh model until the flow field simulation data and the structural response data converge to obtain the target flow field simulation data and the target structural response data.

[0112] Step 160: Analyze the target structure response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow.

[0113] In this embodiment of the disclosure, the computer device can analyze the target structural response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow. The structural response results may include data such as the displacement distribution data, stress distribution data, strain distribution data, maximum deformation location, maximum stress region, and aerodynamic coefficients (such as lift coefficient, drag coefficient, torque coefficient, etc.) of the wind turbine blades.

[0114] Therefore, this disclosure can construct a fluid-structure interaction model of the solid domain of the wind turbine blade and the flow field domain of the cold wave airflow, and solve the fluid-structure interaction model according to the boundary conditions determined by the preset meteorological parameters of the cold wave airflow to obtain the structural response results of the wind turbine blade under the influence of the cold wave airflow. This can accurately assess the stress and deformation of the wind turbine blade under the influence of cold wave weather, provide a scientific basis for the design and maintenance of wind turbine blades, and improve the stability of wind turbine blades during operation in cold wave weather.

[0115] In some embodiments of this disclosure, after analyzing the target structural response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow, the computer device can execute... Figure 2 A flowchart of a simulation method for the impact of cold waves on wind turbine blades is provided, such as... Figure 2 As shown in the figure, the simulation method for the impact of cold waves on wind turbine blades provided in this embodiment includes the following steps:

[0116] Step 210: Obtain the structural response results of the wind turbine blades under the influence of at least two cold wave airflows.

[0117] In this embodiment of the disclosure, the computer device can acquire the structural response results of the wind turbine blades under the influence of at least two cold wave air currents. For example, the at least two cold wave air currents may include ordinary cold waves, strong cold waves, and extremely strong cold waves.

[0118] Step 220: Based on the structural response results of the wind turbine blades under the influence of at least two cold wave airflows, determine the structural change law of the wind turbine blades under the influence of at least two cold wave airflows.

[0119] In this embodiment of the disclosure, the structural change law may include the displacement change law, stress change law, and deformation law of the wind turbine blade under the action of various cold wave airflows.

[0120] In some embodiments, the computer device can also determine the flow field variation patterns of at least two cold wave air currents based on flow field simulation data of at least two cold wave air currents. The flow field variation patterns may include the variation patterns of meteorological parameters of the flow fields of at least two cold wave air currents, etc.

[0121] Therefore, it is possible to accurately assess the stress and deformation of wind turbine blades under the influence of various cold wave weather conditions, provide the structural change law of wind turbine blades under the action of various cold wave airflows, and further provide a scientific basis for the design and maintenance of wind turbine blades, thereby improving the stability of wind turbine blades in cold wave weather.

[0122] Figure 3 This is a schematic diagram of a simulation device for the impact of cold waves on wind turbine blades provided in this embodiment of the disclosure. This device can be understood as the aforementioned computer equipment or a functional module within the aforementioned computer equipment. Figure 3 As shown, the simulation device 300 for the impact of the cold wave on wind turbine blades includes:

[0123] Create module 310 to create the solid domain of the wind turbine blades and the flow field domain that influences the target cold wave airflow on the wind turbine blades;

[0124] The meshing module 320 is used to mesh the solid domain and the flow field domain respectively, to obtain the solid domain mesh model corresponding to the solid domain and the flow field domain mesh model corresponding to the flow field domain.

[0125] The coupling module 330 is used to couple the solid domain mesh model and the flow field domain mesh model to construct the fluid-structure interaction model corresponding to the wind turbine blade.

[0126] The first determining module 340 is used to determine the boundary conditions of the fluid-structure interaction model based on the cold wave threshold corresponding to each preset meteorological parameter of the target cold wave airflow.

[0127] The calculation module 350 is used to input boundary conditions into the fluid-structure interaction model and calculate the target flow field simulation data of the flow field domain mesh model and the target structure response data of the solid domain mesh model under the action of the target flow field simulation data.

[0128] Analysis module 360 ​​is used to analyze the target structure response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow.

[0129] Optionally, the above creation module includes:

[0130] The first acquisition submodule is used to acquire the external shape parameters of the wind turbine blades;

[0131] The second acquisition submodule is used to obtain the geometric data of different cross sections contained in the wind turbine blade in a preset coordinate system from the shape parameters;

[0132] The generation submodule is used to connect the geometry of each section based on the geometric data of each section to generate a three-dimensional structural model of the wind turbine blade.

[0133] The identification submodule is used to identify preset shape regions on the surface of a 3D structural model, wherein the influence of cold air currents on the preset shape regions is less than a preset threshold.

[0134] The removal submodule is used to remove the preset shape regions in the 3D structural model to obtain the solid domain corresponding to the wind turbine blades.

[0135] Optionally, the above creation module includes:

[0136] The first determining submodule is used to determine the diameter of the rotating surface of the wind turbine blades based on the shape parameters of the wind turbine blades;

[0137] The second determining submodule is used to determine the first length by multiplying the first preset multiple by the diameter of the rotating surface of the wind turbine blade in the spanwise direction of the wind turbine blade, and to determine the first width by multiplying the second preset multiple by the diameter of the rotating surface of the wind turbine blade.

[0138] The third determining submodule is used to determine the first height by multiplying the third preset multiple by the diameter of the rotating surface of the wind turbine blade in a plane direction perpendicular to the spanwise direction.

[0139] The multiplication submodule is used to multiply the first length, first width and first height to obtain the flow field domain of the target cold wave airflow on the wind turbine blades;

[0140] Alternatively, the fourth determining submodule is used to determine the boundary region of the wind turbine blades based on their shape parameters.

[0141] The expansion submodule is used to expand the boundary area outward by a preset range to obtain the target area;

[0142] The combination submodule is used to combine the boundary region and the target region to obtain the flow field domain of the impact of the target cold wave airflow on the wind turbine blades.

[0143] Optionally, the size of each grid in the above flow field grid model is positively correlated with the distance between the center of the grid and the boundary of the wind turbine blade.

[0144] Optionally, the first determining module mentioned above includes:

[0145] The type determination submodule is used to determine the type of cold wave to which the target cold wave airflow belongs;

[0146] The third acquisition submodule is used to acquire the variation range of each preset meteorological parameter corresponding to the target cold wave type;

[0147] The fourth acquisition submodule is used to obtain the cold wave threshold corresponding to each preset meteorological parameter from the range of variation of the preset meteorological parameter.

[0148] The condition determination submodule is used to determine the cold wave threshold corresponding to each preset meteorological parameter as the inlet boundary condition of the fluid-structure interaction model, set the outlet boundary condition of the fluid-structure interaction model as a free outflow condition, and set the side boundary condition and top boundary condition of the fluid-structure interaction model as symmetrical boundary conditions.

[0149] Optionally, the above calculation module includes:

[0150] The first solution submodule is used to input the boundary conditions into the fluid-structure interaction model, solve the flow field domain mesh model in the fluid-structure interaction model, and obtain the first flow field simulation data of the flow field domain mesh model under the boundary conditions.

[0151] The second solution submodule is used to transfer the first flow field simulation data to the solid domain mesh model, solve the solid domain mesh model, and obtain the first structural response data of the solid domain mesh model under the action of the first flow field simulation data.

[0152] The iterative submodule is used to feed back the first structural response data to the flow field domain mesh model, update the flow field domain mesh model based on the first structural response data, and iteratively solve the flow field domain mesh model and the solid domain mesh model until the flow field simulation data and structural response data converge, thus obtaining the target flow field simulation data and target structural response data.

[0153] Optionally, the simulation device for the impact of the cold wave on wind turbine blades includes:

[0154] The acquisition module is used to acquire the structural response results of wind turbine blades under the influence of at least two cold wave airflows;

[0155] The second determining module is used to determine the structural change law of the wind turbine blade under the influence of at least two cold wave airflows based on the structural response results of the wind turbine blade under the influence of at least two cold wave airflows.

[0156] The simulation device for the impact of cold waves on wind turbine blades provided in this embodiment can implement the method of any of the above embodiments, and its execution method and beneficial effects are similar, so they will not be described again here.

[0157] This disclosure also provides a computer device, which includes a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, it can implement the methods of any of the above embodiments. The execution method and beneficial effects are similar, and will not be described again here.

[0158] The computer device in this disclosure can be understood as any device with processing and computing capabilities. This device may include, but is not limited to, mobile terminals such as smartphones, laptops, tablets (PADs), and wearable devices, as well as fixed electronic devices such as digital TVs and desktop computers.

[0159] Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of this disclosure, such as... Figure 4 As shown, the computer device 400 may include a processor 410 and a memory 420. The memory 420 stores a computer program 421. When the computer program 421 is executed by the processor 410, it can implement the method provided in any of the above embodiments. The execution mode and beneficial effects are similar and will not be described again here.

[0160] Of course, for the sake of simplicity, Figure 4 Only some of the components of the computer device 400 relevant to the present invention are shown in this illustration; components such as buses, input / output interfaces, input devices, and output devices are omitted. In addition, the computer device 400 may include any other suitable components depending on the specific application.

[0161] This disclosure provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it can implement the methods of any of the above embodiments. The execution method and beneficial effects are similar, and will not be described again here.

[0162] The aforementioned computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0163] The computer program described above can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this disclosure. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer device, partially on the user's device, as a standalone software package, partially on the user's computer device and partially on a remote computer device, or entirely on a remote computer device or server.

[0164] The above description is merely a preferred embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features disclosed in this disclosure that have similar functions.

[0165] Furthermore, while the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be advantageous. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0166] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A simulation method for the impact of cold waves on wind turbine blades, characterized in that, include: Create the solid domain of the wind turbine blades and the flow field domain of the effect of the target cold wave airflow on the wind turbine blades; The solid domain and the flow field domain are meshed respectively to obtain the solid domain mesh model corresponding to the solid domain and the flow field domain mesh model corresponding to the flow field domain; The solid domain mesh model and the flow field mesh model are coupled to construct the fluid-structure interaction model corresponding to the wind turbine blade; Based on the cold wave threshold corresponding to each preset meteorological parameter of the target cold wave airflow, the boundary conditions of the fluid-structure interaction model are determined. The boundary conditions are input into the fluid-structure interaction model to calculate the target flow field simulation data of the flow field domain mesh model and the target structural response data of the solid domain mesh model under the action of the target flow field simulation data. The structural response data of the target structure are analyzed to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow; The determination of the boundary conditions of the fluid-structure interaction model based on the cold wave thresholds corresponding to each preset meteorological parameter of the target cold wave airflow includes: Determine the type of cold wave to which the target cold wave airflow belongs; Obtain the variation range of each preset meteorological parameter corresponding to the target cold wave type; For each of the preset meteorological parameters, the cold wave threshold corresponding to the preset meteorological parameter is obtained from the range of variation of the preset meteorological parameter; The cold wave thresholds corresponding to each of the preset meteorological parameters are determined as the inlet boundary conditions of the fluid-structure interaction model, the outlet boundary conditions of the fluid-structure interaction model are set as free outflow conditions, and the side boundary conditions and top boundary conditions of the fluid-structure interaction model are set as symmetrical boundary conditions.

2. The method according to claim 1, characterized in that, The solid domain for creating the wind turbine blades includes: Obtain the external shape parameters of the wind turbine blades; Obtain the geometric data of the different cross sections of the wind turbine blade in a preset coordinate system from the shape parameters; Based on the geometric data of each section, the geometric bodies to which each section belongs are connected to generate a three-dimensional structural model of the wind turbine blade; Identify a preset shape region on the surface of the three-dimensional structural model, wherein the influence of cold air currents on the preset shape region is less than a preset threshold; Remove the preset shape region from the three-dimensional structural model to obtain the solid domain corresponding to the wind turbine blade.

3. The method according to claim 1, characterized in that, The flow field domain that creates the effect of the target cold wave airflow on the wind turbine blades includes: Based on the shape parameters of the wind turbine blades, the diameter of the rotating surface of the wind turbine blades is determined; In the spanwise direction of the wind turbine blade, the product of a first preset multiple and the diameter of the rotating surface of the wind turbine blade is determined as the first length, and the product of a second preset multiple and the diameter of the rotating surface of the wind turbine blade is determined as the first width. In a plane perpendicular to the spanwise direction, the product of a third preset multiple and the diameter of the rotating surface of the wind turbine blade is determined as the first height; Multiplying the first length, the first width, and the first height yields the flow field domain of the effect of the target cold wave airflow on the wind turbine blades; Alternatively, the boundary region of the wind turbine blades can be determined based on the shape parameters of the wind turbine blades. The boundary region is expanded outward by a predetermined range to obtain the target region; By combining the boundary region and the target region, the flow field domain in which the target cold wave airflow affects the wind turbine blades is obtained.

4. The method according to claim 1, characterized in that, In the flow field mesh model, the size of each mesh is positively correlated with the distance between the center of the mesh and the boundary of the wind turbine blade.

5. The method according to claim 1, characterized in that, The step of inputting the boundary conditions into the fluid-structure interaction model and calculating the target flow field simulation data of the flow field domain mesh model and the target structural response data of the solid domain mesh model under the action of the target flow field simulation data includes: The boundary conditions are input into the fluid-structure interaction model, and the flow field domain mesh model in the fluid-structure interaction model is solved to obtain the first flow field simulation data of the flow field domain mesh model under the boundary conditions. The first flow field simulation data is transferred to the solid domain mesh model, and the solid domain mesh model is solved to obtain the first structural response data of the solid domain mesh model under the action of the first flow field simulation data. The first structural response data is fed back to the flow field mesh model. The flow field mesh model is updated based on the first structural response data. The flow field mesh model and the solid domain mesh model are solved iteratively until the flow field simulation data and structural response data converge, thereby obtaining the target flow field simulation data and target structural response data.

6. The method according to claim 1, characterized in that, After analyzing the target structure response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow, the method further includes: Obtain the structural response results of the wind turbine blades under the influence of at least two cold wave airflows; Based on the structural response results of the wind turbine blades under the influence of at least two cold wave airflows, the structural change law of the wind turbine blades under the action of at least two cold wave airflows is determined.

7. A simulation device for the impact of cold waves on wind turbine blades, characterized in that, The apparatus is used to perform the simulation method as described in any one of claims 1-6, the apparatus comprising: A creation module is used to create the solid domain of the wind turbine blades and the flow field domain that influences the target cold wave airflow on the wind turbine blades; The meshing module is used to mesh the solid domain and the flow field domain respectively, to obtain the solid domain mesh model corresponding to the solid domain and the flow field domain mesh model corresponding to the flow field domain; The coupling module is used to couple the solid domain mesh model and the flow field domain mesh model to construct the fluid-structure interaction model corresponding to the wind turbine blade. The first determining module is used to determine the boundary conditions of the fluid-structure interaction model based on the cold wave threshold corresponding to each preset meteorological parameter of the target cold wave airflow. The calculation module is used to input the boundary conditions into the fluid-structure interaction model and calculate the target flow field simulation data of the flow field domain mesh model and the target structure response data of the solid domain mesh model under the action of the target flow field simulation data under the boundary conditions. The analysis module is used to analyze the target structure response data to obtain the structural response results of the wind turbine blades under the influence of the target cold wave airflow. The first determining module includes: The type determination submodule is used to determine the type of cold wave to which the target cold wave airflow belongs; The third acquisition submodule is used to acquire the variation range of each preset meteorological parameter corresponding to the target cold wave type; The fourth acquisition submodule is used to obtain the cold wave threshold corresponding to each preset meteorological parameter from the range of variation of the preset meteorological parameter. The condition determination submodule is used to determine the cold wave threshold corresponding to each preset meteorological parameter as the inlet boundary condition of the fluid-structure interaction model, set the outlet boundary condition of the fluid-structure interaction model as a free outflow condition, and set the side boundary condition and top boundary condition of the fluid-structure interaction model as symmetrical boundary conditions.

8. A computer device, characterized in that, include: A memory and a processor, wherein the memory stores a computer program that, when executed by the processor, implements a simulation method for the impact of cold waves on wind turbine blades as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements a simulation method for the impact of cold waves on wind turbine blades as described in any one of claims 1-6.

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