A wind turbine structural safety assessment method and system based on stress reconstruction

Abstract

The application discloses a kind of wind turbine structural safety evaluation method and system based on stress reconstruction, which comprises the following steps: establishing the finite element model of each structure of wind turbine and applying unit working condition, extracting the stress component of all nodes on the surface of each structure under unit working condition;Input target load, calculate load proportionality coefficient;According to the stress component of all nodes on the surface of each structure under unit working condition and load proportionality coefficient, the combined stress vector of each node under target load is calculated, until all nodes are traversed, and the complete stress field of each structure of wind turbine under target load is reconstructed;Engineering analysis is carried out on the reconstructed complete stress field, the equivalent stress and safety factor of each node are calculated, and the safety evaluation is carried out according to the safety factor.The application aims to solve the technical problems of low analysis efficiency, insufficient automation and complicated post-processing process in the field of current wind turbine key structure strength analysis.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine structural safety assessment, and in particular to a method and system for assessing the structural safety of wind turbines based on stress reconstruction. Background Technology

[0002] As the capacity of wind turbine units continues to increase, the dimensions of their core structural components, such as hubs, main shafts, bearing housings, front and rear frames, yaw gears, and tower flanges, are also growing, and the aerodynamic, gravitational, inertial, and dynamic loads they bear are becoming increasingly complex. The ultimate strength of these critical metal structural components directly determines the survivability and operational reliability of the entire wind turbine unit under extreme wind conditions. Structural failure can lead not only to huge economic losses but also potentially to serious safety accidents. Therefore, accurate and efficient ultimate strength assessment of these critical components during the design and verification phases has become an indispensable core step in the wind power industry.

[0003] Currently, in engineering practice, strength analysis based on the finite element method is the mainstream technique for such assessments. The typical process involves first building a model of the component in general-purpose finite element software, applying load conditions for solution, and finally viewing the stress and deformation results and calculating the safety factor in the post-processing module. However, with the increasing size and design sophistication requirements of wind turbines, this traditional analysis method reveals the following technical problems when facing complex load combinations and the need for collaborative assessment of multiple components:

[0004] (1) Low analysis efficiency and inability to achieve rapid iteration: For each target load condition that needs to be evaluated, the load needs to be completely reapplied and solved in the finite element software, and then the stress results are extracted for safety judgment. The finite element model of the wind turbine is huge, with millions or even tens of millions of nodes and elements. A single complete finite element solution is itself a computationally intensive and time-consuming process, which may last for hours or even days. In the design optimization and verification stage, a large number of different load conditions need to be evaluated. This serial mode of "modifying load - resolving" constitutes a serious efficiency bottleneck and cannot meet the design requirements of rapid iteration.

[0005] (2) Existing technical processes fail to effectively utilize the linear relationship between load and stress, resulting in a waste of computational resources: For metal structures operating within the elastic range, their stress response and external loads satisfy the principle of linear superposition. This means that once the stress field of the structure under a set of unit loads is obtained through finite element calculations, its stress state under any complex load combination can theoretically be quickly obtained by linearly weighting and superimposing the stresses of each unit load condition using the ratio coefficient between the load vector and the unit load vector, without having to perform expensive full-model finite element solutions each time. However, existing finite element software lacks specialized tools to efficiently manage, call, and calculate these unit load condition results, and to conveniently apply this principle to actual engineering analysis. This prevents this efficient theoretical method from realizing its due engineering value.

[0006] (3) The post-processing process is cumbersome and the degree of automation in result visualization is low: Even if the superimposed stress result is obtained in some way, a series of operations still need to be performed manually in the finite element software to synthesize equivalent stress, extract the maximum value, define the safety factor, etc. Mapping the final stress field after superposition calculation back to the finite element model for visualization is not only highly repetitive, but also requires manual operation for each component and each load combination. It usually requires writing complex post-processing scripts manually. This process has a high technical threshold and is highly repetitive, which becomes an obstacle to the design data closure loop.

[0007] In summary, the field of wind turbine structural strength assessment urgently needs an innovative solution that can overcome the aforementioned bottlenecks in analysis efficiency and seamlessly integrate mechanical principles with engineering practice, so as to achieve a rapid, accurate, systematic, and intuitive assessment of the structural safety of wind turbines. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and propose a method and system for assessing the structural safety of wind turbines based on stress reconstruction. This invention aims to solve the technical problems existing in the field of strength analysis of key structures of wind turbines, such as low analysis efficiency, insufficient automation, and cumbersome post-processing procedures. This invention is not a simple functional supplement or optimization of existing finite element software, but rather to provide a brand-new safety assessment method based on the principle of stress reconstruction.

[0009] The objective of this invention is achieved through the following technical solution: a method for assessing the structural safety of wind turbine units based on stress reconstruction, comprising the following steps:

[0010] S1. Establish finite element models of each structure of the wind turbine and apply a unit load condition, extract the stress components of all nodes on the surface of each structure under the unit load condition; at the same time, input the target load and calculate the load scaling factor.

[0011] S2. Based on the stress components and load ratio coefficients of all nodes on each structural surface under the unit working condition, calculate the combined stress vector of each node under the target load until all nodes are traversed to obtain the complete stress field reconstructed by each structure of the wind turbine under the target load.

[0012] S3. Perform engineering analysis on the reconstructed complete stress field, calculate the equivalent stress of each node, further calculate the safety factor of each node, and conduct a safety assessment based on the safety factor.

[0013] Furthermore, the method includes the following steps:

[0014] S4. The equivalent stress of each node calculated in step S3 is automatically compiled into a command stream file according to the preset syntax rules;

[0015] S5, visualizes the command stream file, and displays the structural safety assessment results.

[0016] Furthermore, step S1 includes:

[0017] A structural finite element model of each component of the wind turbine is established. After applying a unit load condition to the structural finite element model, a finite element static analysis is performed to extract the stress components of all nodes on each structural surface under the unit load condition. The unit load condition includes unit force loads along the X-axis, Y-axis, and Z-axis of the coordinate system, as well as unit bending moment loads around the X-axis, Y-axis, and Z-axis. The stress components include normal stress in the X-axis direction, normal stress in the Y-axis direction, normal stress in the Z-axis direction, XY-plane shear stress, YZ-plane shear stress, and ZX-plane shear stress. Finally, the extracted stress components are exported as structured text. The data arrangement rule of this structured text is: one line of data corresponds to one node, and each line of data contains the node number and the value of the stress component.

[0018] Furthermore, step S1 includes:

[0019] The target load is an array of multiple load components, each corresponding to a unit load condition. The ratio of each load component to its corresponding unit load condition is calculated to obtain the load proportionality coefficient.

[0020] Furthermore, step S2 includes:

[0021] For each structure of the wind turbine, the structured text of all stress components under each unit load condition is read and traversed to every node of the structure; the stress components of each node are extracted from each unit load condition to form a stress vector; the stress vector of each unit load condition is multiplied by the corresponding load scaling factor to obtain a weighted stress vector; finally, all weighted stress vectors are algebraically superimposed to obtain the composite stress vector of the node under the target load; by traversing all nodes through a loop structure, the complete stress field of each structure of the wind turbine under the target load is finally reconstructed.

[0022] Furthermore, step S3 includes:

[0023] After obtaining the composite stress vector of each node, the equivalent stress of each node is calculated according to the preset strength theory; further, the safety factor of each node is calculated, as follows:

[0024] Safety factor = Material yield strength / Equivalent stress;

[0025] In the formula, the yield strength of the material is the material physical property parameter of each structure of the wind turbine.

[0026] Furthermore, step S4 includes:

[0027] The command stream file includes commands to define arrays, write nodal equivalent stress result data into arrays, map arrays to corresponding nodes of the finite element model, set contour plot display options, and draw equivalent stress contour plots.

[0028] A stress-reconfiguration-based wind turbine structural safety assessment system, used to implement the aforementioned stress-reconfiguration-based wind turbine structural safety assessment method, includes:

[0029] The finite element model module is used to create finite element models of various structures of the wind turbine and apply unit load conditions.

[0030] The stress component extraction module is used to extract the stress components of all nodes on each structural surface under a unit working condition.

[0031] The load proportionality coefficient calculation module calculates the load proportionality coefficient based on the input target load and unit working condition.

[0032] The stress field reconstruction model calculates the combined stress vector of each node under the target load based on the stress components and load ratio coefficient of all nodes on each structural surface under the unit working condition, until all nodes are traversed, and obtains the complete stress field reconstructed by each structure of the wind turbine under the target load.

[0033] The safety factor calculation module calculates the equivalent stress of each node based on the reconstructed complete stress field, further calculates the safety factor of each node, and performs a safety assessment based on the safety factor.

[0034] The command stream file compilation module automatically compiles the command stream file according to the equivalent power of each node and the preset syntax rules.

[0035] The visualization module acquires and visualizes the command stream file output by the compilation module, displaying the structural security assessment results.

[0036] A non-transitory computer-readable medium storing instructions that, when executed by a processor, perform the steps of the stress-reconfiguration-based wind turbine structural safety assessment method described above.

[0037] A computing device includes a processor and a memory for storing processor-executable programs. When the processor executes the program stored in the memory, it implements the above-described stress-reconfiguration-based wind turbine structural safety assessment method.

[0038] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0039] 1. This invention improves analysis efficiency by using a linear superposition calculation engine based on stress reconstruction theory, replacing the traditional repetitive finite element solution. In traditional methods, each evaluation of a new set of loads requires resubmission in the finite element software and waiting for the finite element solver to calculate, a process that takes several hours. This invention eliminates the time-consuming finite element solution step, making it possible to quickly evaluate massive load conditions in design iteration, parametric studies, and reliability analysis.

[0040] 2. This invention enables integrated, standardized, and collaborative analysis of multiple components in wind turbine units. Traditional methods require engineers to perform independent, sequential analysis of each component, which is not only labor-intensive but also prone to inconsistencies due to differences in operation sequence and parameter settings. This invention, through unified process control, can complete the strength assessment of all specified components in one go, ensuring that different components are evaluated in parallel under different loads. This eliminates analytical biases caused by human factors and greatly enhances the reliability and comparability of the assessment results.

[0041] 3. This invention visualizes the post-processing process, generating a fully automated command flow file and directly encoding the calculation results into executable instructions. Addressing the issues of high error rates and difficulty in reviewing manual post-processing operations, this invention solidifies error-prone steps such as stress synthesis and safety factor calculation into reliable program code, ensuring accuracy. Furthermore, each analysis generates a standardized command flow file, making the analysis process fully traceable and the results reproducible, greatly enhancing the rigor of engineering analysis.

[0042] 4. While the stress reconstruction principle is theoretically recognized, its engineering application typically requires strong programming skills and finite element knowledge, presenting a high barrier to entry. This invention simplifies this complex process, allowing direct application without coding. This not only lowers the technical requirements for users but also simplifies repetitive tasks, enabling them to focus on load analysis, result evaluation, and design optimization, significantly improving overall work efficiency and quality.

[0043] In summary, this invention effectively solves the core technical problems in the structural strength assessment of wind turbine units, and brings progress in terms of efficiency, accuracy, reliability and ease of use, which has important positive significance for improving the design and development level of wind power equipment. Attached Figure Description

[0044] Figure 1 This is a flowchart of the method for assessing the structural safety of wind turbine units.

[0045] Figure 2 This is a comparison chart of stress visualization and accuracy between finite element calculation and the present invention. Detailed Implementation

[0046] The present invention will be further described below with reference to specific embodiments.

[0047] Example 1

[0048] See Figure 1 As shown in the figure, the wind turbine structure safety assessment method based on stress reconstruction provided in this embodiment includes the following steps:

[0049] S1. Establish finite element models of the wind turbine components, including the hub, main shaft, bearing housing, front and rear frames, yaw gear ring, tower top flange, and other large structural components. Apply a unit load Fj_unit to the structural finite element model and perform finite element static analysis to extract the stress components of all nodes on each structural surface under the unit load Fj_unit. The unit load Fj_unit includes the unit force load along the X-axis, the unit force load along the Y-axis, the unit force load along the Z-axis, the unit bending moment load around the X-axis, and the unit bending moment load around the Y-axis. The unit bending moment load and the unit bending moment load about the Z-axis of the coordinate system are specifically defined as the unit load case Fj_unit, which includes Fx_unit, Fy_unit, Fz_unit, Mx_unit, My_unit, Mz_unit, Ax_unit, Ay_unit, Az_unit, Rx_unit, Ry_unit, and Rz_unit, where j=1, 2, 3, ..., 12. j=1 is Fx, j=2 is Fy, j=3 is Fz, j=4 is Mx, j=5 is My, j=6 is Mz, j=7 is Ax, and j=8 is A y, j=9 is Az, j=10 is Rx, j=11 is Ry, j=12 is Rz, F represents torque; M represents bending moment; A represents linear acceleration; R represents angular acceleration. Each term includes a positive and negative sign representing the direction, i.e., Fx_unit includes Fx+_unit and Fx-_unit, Fy_unit includes Fy+_unit and Fy-_unit, Fz_unit includes Fz+_unit and Fz-_unit, Mx_unit includes Mx+_unit and Mx-_unit, and My_unit includes My+_unit. it and My-_unit, Mz_unit includes Mz+_unit and Mz-_unit, Ax_unit includes Ax+_unit and Ax-_unit, Ay_unit includes Ay+_unit and Ay-_unit, Az_unit includes Az+_unit and Az-_unit, Rx_unit includes Rx+_unit and Rx-_unit, Ry_unit includes Ry+_unit and Ry-_unit, Rz_unit includes Rz+_unit and Rz-_unit.

[0050] The stress components include the normal stress σ_x in the X-axis direction, the normal stress σ_y in the Y-axis direction, the normal stress σ_z in the Z-axis direction, the shear stress τ_xy in the XY plane, the shear stress τ_yz in the YZ plane, and the shear stress τ_zx in the ZX plane. Finally, the extracted stress components are exported as structured text, preferably in CSV or TXT format. The data arrangement rule of this structured text is: one row of data corresponds to one node, and each row of data contains the node number and the value of the stress component. The structured text is used as the input file.

[0051] Based on actual engineering requirements, determine the target load Fi_j_target to be evaluated, where i represents the number of loads, such as i = 300 * 12000 = 3,600,000, and j represents the load component. The target load Fi_j_target is an array containing multiple load components, with each load component corresponding to a unit load condition. The target load Fi_j_target is represented as a vector form of [Fx, Fy, Fz, Mx, My, Mz], where Fx represents the load component of unit force along the X-axis of the coordinate system, Fy represents the load component of unit force along the Y-axis of the coordinate system, Fz represents the load component of unit force along the Z-axis of the coordinate system, Mx represents the load component of unit bending moment around the X-axis of the coordinate system, My represents the load component of unit bending moment around the Y-axis of the coordinate system, and Mz represents the load component of unit bending moment around the Z-axis of the coordinate system.

[0052] For example, the first load: F1_1_target=1000; F1_2_target=-3456; F1_3_target=4682;

[0053] The 300th load: F300_1_target=42389; F300_8_target=-9630;

[0054] The 700th load: F700_5_target=-42389; F700_12_target=58731;

[0055] In this embodiment, the target load is input through a parameter file, and the ratio of each load component to its corresponding unit load condition is further calculated to obtain the load proportionality coefficient ki_j=Fi_j_target / Fj_unit, such as: k1_1=F1_1_target / Fx_unit, k1_2=F1_2_target / Fy_unit, k300_7=A300_7_target / Ax_unit; where, if Fi_j_target is positive, the unit load condition Fj_unit takes its corresponding positive sign, otherwise it takes a negative sign; for example: F1_1_target=1000, k1_1=F1_1_target / Fx+_unit; M700_5_target=-42389, k700_5= F700_5_target / My-_unit.

[0056] S2. Based on the stress components and load proportion coefficients of all nodes on each structural surface under the unit working condition, calculate the composite stress vector of each node under the target load until all nodes are traversed to obtain the complete stress field reconstructed by each structure of the wind turbine under the target load; the main purpose is to amplify the stress based on the load proportion coefficient ki_j.

[0057] For each structure of the wind turbine, the structured text of all stress components under each unit load condition is read and traversed to each node of the structure; the stress components of each node are extracted from each unit load condition to form a stress vector [σj_k_unit], where k represents the index of the stress component, k=1,2,…,6, k=1 is σ_xx, k=2 is σ_yy, k=3 is σ_zz, k=4 is τ_xy, k=5 is τ_yz, and k=6 is τ_zx. For example, σ3_5_unit represents τ_yz under the unit load condition Fz_unit; the stress vector of each unit load condition is multiplied by the corresponding load proportion coefficient ki_j to obtain the weighted stress vector σi_j_k, calculated by the following formula:

[0058] σi_j_k=ki_j *σj_k_unit;

[0059] Finally, for each working condition, the six amplified stresses under each component are algebraically superimposed according to the same stress components to obtain the composite stress vector [σi_k] of that node under the target load, σi_k = σi_1_k + σi_2_k + σi_3_k + … + σi_12_k, that is:

[0060] ;

[0061] By traversing all nodes using a loop structure, the complete stress field of each structure of the wind turbine under the target load is finally reconstructed.

[0062] S3. Perform engineering analysis on the reconstructed complete stress field, calculate the equivalent stress of each node, further calculate the safety factor of each node, and conduct a safety assessment based on the safety factor;

[0063] After obtaining the synthetic stress vector [σi_k] for each node, the equivalent stress σ of each node is calculated according to the preset Von Mises yield criterion. ivon ;

[0064] ;

[0065] Furthermore, the safety factor for each node is calculated using the following formula:

[0066] Safety factor = Material yield strength / σ ivon ;

[0067] In the formula, the yield strength of the material is the material physical property parameter of each structure of the wind turbine.

[0068] S4. The equivalent stress of each node calculated in step S3 is automatically compiled into a command stream file according to the preset syntax rules of the CAE software. The command stream file includes commands to define arrays, commands to write the equivalent stress result data of nodes into arrays, commands to map arrays to the corresponding nodes of the finite element model, commands to set cloud plot display options, and commands to draw equivalent stress cloud plots. The generated command stream file can be directly read and executed by the target CAE software.

[0069] S5. Visualizes the command flow file, displaying the structural safety assessment results. See also... Figure 2 As shown, the equivalent stress cloud diagram b generated in this embodiment has higher accuracy compared with the equivalent stress cloud diagram a obtained by existing finite element calculation.

[0070] Example 2

[0071] This embodiment provides a wind turbine structural safety assessment system based on stress reconstruction, used to implement the wind turbine structural safety assessment method based on stress reconstruction described in Embodiment 1, including:

[0072] The finite element model module is used to create finite element models of various structures of the wind turbine and apply unit load conditions.

[0073] The stress component extraction module is used to extract the stress components of all nodes on each structural surface under a unit working condition.

[0074] The load proportionality coefficient calculation module calculates the load proportionality coefficient based on the input target load and unit working condition.

[0075] The stress field reconstruction model calculates the combined stress vector of each node under the target load based on the stress components and load ratio coefficient of all nodes on each structural surface under the unit working condition, until all nodes are traversed, and obtains the complete stress field reconstructed by each structure of the wind turbine under the target load.

[0076] The safety factor calculation module calculates the equivalent stress of each node based on the reconstructed complete stress field, further calculates the safety factor of each node, and performs a safety assessment based on the safety factor.

[0077] The command stream file compilation module automatically compiles the command stream file according to the equivalent power of each node and the preset syntax rules.

[0078] The visualization module acquires and visualizes the command stream file output by the compilation module, displaying the structural security assessment results.

[0079] Example 3

[0080] This embodiment discloses a non-transitory computer-readable medium storing instructions that, when executed by a processor, perform the steps of the stress-reconfiguration-based wind turbine structural safety assessment method according to Embodiment 1.

[0081] In this embodiment, the non-transitory computer-readable medium can be a disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), USB flash drive, portable hard drive, etc.

[0082] Example 4

[0083] This embodiment discloses a computing device, including a processor and a memory for storing processor-executable programs. When the processor executes the program stored in the memory, it implements the stress-reconfiguration-based wind turbine structural safety assessment method described in Embodiment 1.

[0084] The computing device described in this embodiment may be a desktop computer, laptop computer, smartphone, PDA handheld terminal, tablet computer, programmable logic controller (PLC), or other terminal device with processor function.

[0085] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, any changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for assessing the structural safety of wind turbine units based on stress reconstruction, characterized in that, Includes the following steps: S1. Establish finite element models of each structure of the wind turbine and apply a unit load condition to extract the stress components of all nodes on the surface of each structure under the unit load condition. Simultaneously, input the target load and calculate the load proportionality coefficient; S2. Based on the stress components and load ratio coefficients of all nodes on each structural surface under the unit working condition, calculate the combined stress vector of each node under the target load until all nodes are traversed to obtain the complete stress field reconstructed by each structure of the wind turbine under the target load. S3. Perform engineering analysis on the reconstructed complete stress field, calculate the equivalent stress of each node, further calculate the safety factor of each node, and conduct a safety assessment based on the safety factor.

2. The method for assessing the structural safety of wind turbine units based on stress reconstruction according to claim 1, characterized in that, Includes the following steps: S4. The equivalent stress of each node calculated in step S3 is automatically compiled into a command stream file according to the preset syntax rules; S5, visualizes the command stream file, and displays the structural safety assessment results.

3. The method for assessing the structural safety of wind turbine units based on stress reconstruction according to claim 1, characterized in that, Step S1 includes: A structural finite element model of each component of the wind turbine is established. After applying a unit load condition to the structural finite element model, a finite element static analysis is performed to extract the stress components of all nodes on each structural surface under the unit load condition. The unit load condition includes unit force loads along the X-axis, Y-axis, and Z-axis of the coordinate system, as well as unit bending moment loads around the X-axis, Y-axis, and Z-axis. The stress components include normal stress in the X-axis direction, normal stress in the Y-axis direction, normal stress in the Z-axis direction, XY-plane shear stress, YZ-plane shear stress, and ZX-plane shear stress. Finally, the extracted stress components are exported as structured text. The data arrangement rule of this structured text is: one line of data corresponds to one node, and each line of data contains the node number and the value of the stress component.

4. The method for assessing the structural safety of wind turbine units based on stress reconstruction according to claim 3, characterized in that, Step S1 includes: The target load is an array of multiple load components, each corresponding to a unit load condition. The ratio of each load component to its corresponding unit load condition is calculated to obtain the load proportionality coefficient.

5. The method for assessing the structural safety of wind turbine units based on stress reconstruction according to claim 4, characterized in that, Step S2 includes: For each structure of the wind turbine, the structured text of all stress components under each unit load condition is read and traversed to every node of the structure; the stress components of each node are extracted from each unit load condition to form a stress vector; the stress vector of each unit load condition is multiplied by the corresponding load scaling factor to obtain a weighted stress vector; finally, all weighted stress vectors are algebraically superimposed to obtain the composite stress vector of the node under the target load; by traversing all nodes through a loop structure, the complete stress field of each structure of the wind turbine under the target load is finally reconstructed.

6. The method for assessing the structural safety of wind turbine units based on stress reconstruction according to claim 5, characterized in that, Step S3 includes: After obtaining the composite stress vector of each node, the equivalent stress of each node is calculated according to the preset strength theory; further, the safety factor of each node is calculated, and the formula is as follows: Safety factor = material yield strength / equivalent stress; In the formula, the yield strength of the material is the material physical property parameter of each structure of the wind turbine.

7. The method for assessing the structural safety of wind turbine units based on stress reconstruction according to claim 2, characterized in that, Step S4 includes: The command stream file includes commands to define arrays, write nodal equivalent stress result data into arrays, map arrays to corresponding nodes of the finite element model, set contour plot display options, and draw equivalent stress contour plots.

8. A wind turbine structural safety assessment system based on stress reconstruction, characterized in that, The method for assessing the structural safety of wind turbines based on stress reconstruction as described in any one of claims 1-7 includes: The finite element model module is used to create finite element models of various structures of the wind turbine and apply unit load conditions. The stress component extraction module is used to extract the stress components of all nodes on each structural surface under a unit working condition. The load proportionality coefficient calculation module calculates the load proportionality coefficient based on the input target load and unit working condition. The stress field reconstruction model calculates the combined stress vector of each node under the target load based on the stress components and load ratio coefficient of all nodes on each structural surface under the unit working condition, until all nodes are traversed, and obtains the complete stress field reconstructed by each structure of the wind turbine under the target load. The safety factor calculation module calculates the equivalent stress of each node based on the reconstructed complete stress field, further calculates the safety factor of each node, and performs a safety assessment based on the safety factor. The command stream file compilation module automatically compiles the command stream file according to the equivalent power of each node and the preset syntax rules. The visualization module acquires and visualizes the command stream file output by the compilation module, displaying the structural security assessment results.

9. A non-transitory computer-readable medium storing instructions, characterized in that, When the instruction is executed by the processor, the steps of the wind turbine structural safety assessment method based on stress reconstruction according to any one of claims 1-7 are performed.

10. A computing device, comprising a processor and a memory for storing a processor-executable program, characterized in that, When the processor executes the program stored in the memory, it implements the stress-reconfiguration-based wind turbine structural safety assessment method as described in any one of claims 1-7.

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