Wind power blade hoisting load simulation analysis method and device and storage medium

Abstract

The invention relates to a wind power blade hoisting load simulation analysis method which comprises the following steps: defining a plurality of simulation working conditions corresponding to a plurality of hoisting scenes according to a blade hoisting scheme of a wind generating set and the plurality of hoisting scenes; a multi-body coupling model established on the basis of a blade hoisting system is adopted, hoisting load simulation analysis is conducted on the basis of the multiple simulation working conditions, hoisting load data of the multiple simulation working conditions are obtained, and the multi-body coupling model comprises blades, a draught fan main engine, a hoisting tool and environment wind conditions. The invention further provides a wind power blade hoisting load simulation analysis device and a storage medium. The simulation analysis of the hoisting load of the wind power blade is realized, the load level of the blade and the whole machine in the hoisting process of the wind power blade can be evaluated, physical tests can be reduced, and the hoisting safety of the wind power blade can be enhanced.

Description

Technical Field

[0001] This invention relates to the field of wind turbine installation technology, specifically to a method, device, and storage medium for simulating and analyzing the load during wind turbine blade hoisting. Background Technology

[0002] As large-megawatt, large-rotor-diameter wind turbines gradually become the mainstream in my country's industry, blades are also trending towards larger size and greater flexibility, presenting increasing challenges for installation operations. Traditional installation methods are no longer sufficient to meet the needs of modern engineering. Single-blade installation, due to its high loading efficiency, long operating wind window, low lifting weight, and high efficiency and safety, has become the primary installation method for long, flexible blades of large wind turbines. Single-blade installation involves multi-body coupling of the blade, turbine, lifting equipment, and environmental wind conditions. Modeling and simulation to analyze the load and faults during single-blade installation is crucial for feasibility verification, accident avoidance, and safety assessment of single-blade installation schemes. However, current technologies still lack systematic methods and mature experience for load simulation analysis of wind turbine blade installation processes. Summary of the Invention

[0003] The purpose of this invention is to propose a method, device, and storage medium for simulating and analyzing the load during the hoisting of wind turbine blades, so as to realize the load simulation analysis of the wind turbine blade hoisting process.

[0004] The wind turbine blade hoisting load simulation analysis method of the present invention includes the following steps:

[0005] Based on the blade hoisting scheme and multiple hoisting scenarios of the wind turbine generator set, several simulation conditions corresponding to the multiple hoisting scenarios are defined;

[0006] A multi-body coupling model based on the blade hoisting system was adopted, and hoisting load simulation analysis was performed based on multiple simulation conditions to obtain hoisting load data for multiple simulation conditions. The multi-body coupling model includes the blade, the wind turbine main unit, the hoisting equipment, and the environmental wind conditions.

[0007] Optionally, the blade hoisting scheme includes: a first blade horizontal hoisting process, a single blade turning process, a second blade horizontal hoisting process, a double blade turning process, and a third blade horizontal hoisting process.

[0008] Optionally, multiple simulation conditions include the first simulation condition, the second simulation condition, the third simulation condition, the fourth simulation condition, and the fifth simulation condition;

[0009] The first simulation condition includes: the root bolts of the first blade are tightened; the azimuth angle varies from 90 degrees to 210 degrees with a step size of 10 degrees; the wind direction varies from 0 degrees to 360 degrees with a step size of 1 degree; and the pitch angle varies from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a step size of 5 degrees.

[0010] The second simulation condition includes: the root bolts of the first blade are tightened; the azimuth angles include 90 degrees, 180 degrees, and 210 degrees; the wind direction varies from 0 degrees to 360 degrees with a step size of 1 degree; the pitch angle varies from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a step size of 5 degrees; and the wind speed is the preset extreme wind speed multiplied by the preset wind speed safety factor.

[0011] The third simulation condition includes: tightening the root bolts of the second blade; the azimuth angle changes from 210 degrees to 330 degrees with a change step of 10 degrees; the wind direction changes from 0 degrees to 360 degrees with a change step of 1 degree; and the pitch angle changes from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a change step of 5 degrees.

[0012] The fourth simulation condition includes: the root bolts of the second blade are tightened; the azimuth angles include 210 degrees, 240 degrees, and 330 degrees; the wind direction varies from 0 degrees to 360 degrees with a step size of 1 degree; the pitch angle varies from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a step size of 5 degrees; and the wind speed is a preset extreme wind speed multiplied by a preset wind speed safety factor.

[0013] The fifth simulation condition includes: the wind turbine is in standby mode, there is no power supply for yaw, and the root bolts of the third blade are tightened; the azimuth angle varies from 0 to 90 degrees with a step size of 30 degrees; the wind direction varies from 0 to 360 degrees with a step size of 1 degree; and the pitch angle varies from 85 to 95 degrees or from 180 to 0 degrees with a step size of 5 degrees.

[0014] Optionally, the lifting load simulation analysis based on multiple simulation conditions includes the following steps:

[0015] Solve the structural dynamics equations based on the multibody coupling model and each of the simulation conditions. Calculate the dynamic response data of the blade hoisting system under each simulation condition; where M is the mass matrix of the blade hoisting system, C is the damping matrix of the blade hoisting system, and K is the stiffness matrix of the blade hoisting system. q and q are the displacement response, velocity response and acceleration response of the blade hoisting system at any time, respectively, and f is the time-varying external excitation acting on the blade hoisting system.

[0016] Optionally, the simulation analysis method for wind turbine blade hoisting load also includes the following steps: solving the structural dynamics equations using the implicit Newmark-beta integration method to obtain the dynamic response data of the blade hoisting system at each time step.

[0017] Optionally, the hoisting load data includes blade root bolt load data, wind turbine locking load data, gearbox load data, turning gear motor load data, yaw bearing load data, tower base bending moment load data, and tower top bending moment load data.

[0018] Optionally, the following steps may also be included: post-processing the hoisting load data to complete the load assessment.

[0019] This invention also proposes a wind turbine blade hoisting load simulation analysis device, comprising:

[0020] The working condition generation module is used to define multiple simulation working conditions corresponding to multiple lifting scenarios based on the blade lifting scheme and multiple lifting scenarios of the wind turbine generator set.

[0021] The calculation module is used to: use a multi-body coupling model based on the blade hoisting system to perform hoisting load simulation analysis based on multiple simulation conditions, and obtain hoisting load data for multiple simulation conditions. The multi-body coupling model includes the blade, the wind turbine main unit, the hoisting equipment, and the environmental wind conditions.

[0022] Optionally, the wind turbine blade hoisting load simulation analysis device also includes a post-processing module, which is used to: perform post-processing on the hoisting load data to complete the load assessment.

[0023] The present invention also proposes a storage medium storing a computer program, which, when executed by a processor, implements the wind turbine blade hoisting load simulation analysis method described in any of the above claims.

[0024] This invention enables simulation analysis of wind turbine blade hoisting loads, which can assess the load levels of the blades and the entire turbine during the hoisting process. This helps reduce physical testing and enhances the safety of wind turbine blade hoisting. Attached Figure Description

[0025] Figure 1 This is a flowchart of the wind turbine blade hoisting load simulation analysis method described in some embodiments;

[0026] Figure 2 This is a schematic diagram of the wind turbine blade hoisting load simulation analysis device described in some embodiments. Detailed Implementation

[0027] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0028] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] like Figure 1 The method for simulating and analyzing the lifting load of a wind turbine blade, as shown, includes the following steps:

[0030] S10: Based on the blade hoisting scheme and multiple hoisting scenarios of the wind turbine generator set, define multiple simulation conditions corresponding to the multiple hoisting scenarios respectively;

[0031] S20: A multi-body coupling model based on the blade hoisting system is adopted. Hoisting load simulation analysis is performed based on multiple simulation conditions to obtain hoisting load data for multiple simulation conditions. The multi-body coupling model includes the blade, wind turbine main unit, hoisting equipment and environmental wind conditions.

[0032] By adopting the above technical solution, based on the blade hoisting scheme and multiple hoisting scenarios, a simulation working condition that is more consistent with the blade hoisting process can be defined, thereby obtaining hoisting load data that is more consistent with the blade hoisting process. By combining simulation analysis with a multi-body coupling model that considers the blade, wind turbine main unit, hoisting equipment and environmental wind conditions, the load level of the blade and the wind turbine generator set during the wind turbine blade hoisting process can be more accurately evaluated, ensuring the load safety of the blade hoisting process.

[0033] In practical implementation, a multibody coupling model can be established in a multibody dynamics simulation software platform based on the physical and geometric properties of the blades, wind turbine main unit (including tower, nacelle, hub, and other components), and lifting tools of the blade lifting system, combined with the environmental wind conditions of the lifting site. Multibody dynamics simulation software platforms such as Abaqus, Adams, and Simpack can be used for modeling.

[0034] In some embodiments, the blade hoisting scheme includes: a first blade horizontal hoisting process, a single blade turning process, a second blade horizontal hoisting process, a double blade turning process, and a third blade horizontal hoisting process. This blade hoisting scheme encompasses the entire process of wind turbine blade hoisting, providing a reference for establishing multiple hoisting scenarios and helping to more accurately assess the load levels of the blades and the entire wind turbine during the wind turbine blade hoisting process.

[0035] In some embodiments, taking the forward-facing blade lifting scheme as an example, the lifting scenarios and simulation conditions are set as follows: multiple simulation conditions include a first simulation condition, a second simulation condition, a third simulation condition, a fourth simulation condition, and a fifth simulation condition; multiple lifting scenarios include a first lifting scenario, a second lifting scenario, a third lifting scenario, a fourth lifting scenario, and a fifth lifting scenario.

[0036] The first hoisting scenario is as follows: the blade is hoisted horizontally with its leading edge facing forward. The blade is installed horizontally at a pitch angle of 90°±5°, with only some bolts tightened. Facing the rotor, it is rotated 120° clockwise using a hydraulic chuck. Correspondingly, the first simulation condition includes: tightening the root bolts of the first blade; the azimuth angle varies from 90° to 210° with a step size of 10°; the wind direction varies from 0° to 360° with a step size of 1°; and the pitch angle varies from 85° to 95° with a step size of 5°.

[0037] The second hoisting scenario is as follows: the wind speed exceeds the wind speed requirement for blade hoisting, the blade installation is not completed, and only the semi-finished wind turbine generator with the first blade can withstand the extreme wind speed; correspondingly, the second simulation conditions include: the root bolts of the first blade are tightened; the azimuth angles include 90 degrees, 180 degrees and 210 degrees; the wind direction changes from 0 degrees to 360 degrees, with a change step of 1 degree; the pitch angle changes from 85 degrees to 95 degrees, with a change step of 5 degrees; the wind speed is the preset extreme wind speed * the preset wind speed safety factor.

[0038] The third hoisting scenario is as follows: After the first blade is installed, the second blade is installed, with only some bolts tightened; facing the rotor, it is rotated 120° clockwise using a hydraulic crank. Correspondingly, the third simulation condition includes: tightening the root bolts of the second blade; the azimuth angle changes from 210 degrees to 330 degrees, with a change step of 10 degrees; the wind direction changes from 0 degrees to 360 degrees, with a change step of 1 degree; and the pitch angle changes from 85 degrees to 95 degrees, with a change step of 5 degrees.

[0039] The fourth hoisting scenario is as follows: the wind speed exceeds the wind speed requirement for blade hoisting, the wind turbine generator installation is not completed, and the semi-finished wind turbine generator with two blades resists extreme wind speeds; correspondingly, the fourth simulation condition includes: the root bolts of the second blade are tightened; the azimuth angles include 210 degrees, 240 degrees and 330 degrees; the wind direction changes from 0 degrees to 360 degrees, with a change step of 1 degree; the pitch angle changes from 85 degrees to 95 degrees, with a change step of 5 degrees; the wind speed is the preset extreme wind speed * the preset wind speed safety factor.

[0040] The fifth hoisting scenario is as follows: The third blade is being hoisted, with only some blade bolts tightened. The wind speed suddenly increases, exceeding the designed hoisting wind speed. The rotor is in standby mode, and personnel evacuate. Correspondingly, the fifth simulation condition includes: the rotor is in standby mode, yaw is not powered, and the root bolts of the third blade are partially tightened; the azimuth angle varies from 0 to 90 degrees with a step size of 30 degrees; the wind direction varies from 0 to 360 degrees with a step size of 1 degree; and the pitch angle varies from 85 to 95 degrees with a step size of 5 degrees.

[0041] In practice, the preset extreme wind speed can be the once-in-a-year extreme wind speed, and the preset wind speed safety factor can be 1.4.

[0042] By adopting the above technical solution, the entire process of wind turbine blade hoisting is covered by reasonably setting up hoisting scenarios and defining simulation conditions. It also fully considers special situations such as turning gear motor failure and sudden changes in wind speed. Different safety factors are considered for loads with different components such as aerodynamics and gravity, avoiding under-evaluation and over-evaluation of loads. It can more accurately evaluate the load level of the blade and the whole machine during hoisting, and ensure the load safety of the blade hoisting process.

[0043] In some embodiments, when using a blade lifting scheme with the trailing edge facing forward, it is necessary to add a working condition definition from trailing edge leading pitch to leading pitch based on the above lifting scenario, considering the process of the pitch angle changing from 180 degrees to 0 degrees after each blade is lifted. In specific implementation, the simulation working condition can be defined as follows: the pitch angle changes from 180 degrees to 0 degrees, with a change step of 5 degrees; to simulate the process of the pitch angle changing from 180 degrees to 0 degrees after the blade is lifted.

[0044] In some embodiments, performing hoisting load simulation analysis based on multiple simulation conditions includes the following steps:

[0045] Solve the structural dynamics equations based on the multibody coupling model and each simulation condition. Calculate the dynamic response data of the blade hoisting system under each simulation condition; where M is the mass matrix of the blade hoisting system, C is the damping matrix of the blade hoisting system, and K is the stiffness matrix of the blade hoisting system. Let q and q represent the displacement, velocity, and acceleration responses of the blade hoisting system at any given time, respectively, and f be the time-varying external excitation acting on the blade hoisting system. By solving the structural dynamics equations, the displacement, velocity, and acceleration responses of each component and part of the blade hoisting system can be obtained, thereby acquiring the hoisting load data.

[0046] In practical implementation, existing algorithms such as direct integration and modal superposition can be used to solve the structural dynamics equations, including the Newmark-beta method and the generalized-α method. Alternatively, the solvers of multibody dynamics simulation software platforms can be used directly, which are convenient and fast, such as the solvers in Adams and Simpack, and the Mechanical APDL solver in ANSYS.

[0047] As a preferred example, the implicit Newmark-beta integration method is used to solve the structural dynamics equations to obtain the dynamic response data of the blade hoisting system at each time step. The implicit Newmark-beta integration method decomposes the dynamic response in the continuous time dimension into multiple time steps. Using numerical integration formulas, starting from the known response at the initial moment (initial displacement, velocity, acceleration), the system response at each subsequent time step is recursively obtained step by step, ultimately reconstructing the dynamic changes of the entire hoisting process.

[0048] The implicit Newmark-beta integration method transforms complex structural dynamic equations into calculable time-step responses by setting time steps and integration parameters, deriving integration constants, and solving step by step. This allows for more accurate acquisition of dynamic data such as state acceleration at each moment, providing a reliable basis for subsequent load assessment of blades and the entire machine, and helping to more accurately simulate the entire blade hoisting process.

[0049] The implicit Newmark-beta integration method is particularly suitable for the computational scenario of this application due to its unconditional stability and ability to handle nonlinear problems. It can effectively deal with the large deformation of the flexible body, the complex nonlinear constraints between components, and the transient dynamic process in the rigid-flexible coupling system. It can allow for a relatively large time step while ensuring computational accuracy, thus significantly improving the solution efficiency.

[0050] As an example of a calculation process, the above structural dynamics equations are expanded as follows:

[0051]

[0052] Nodal acceleration can be measured strain acceleration And the solution is completed using the Lagrange multiplier λ. rr M is the mass submatrix of the rigid body's degrees of freedom.rε M is the mass submatrix of the rigid-flexible body coupling. εε Mass submatrix of flexible body degrees of freedom, C εε The damping sub-matrix of the flexible body's degrees of freedom, K εε The stiffness submatrix of the flexible body's degrees of freedom, D r and D represents the rigid body degree-of-freedom constraint matrix and its transpose. ε , and The constraint matrix of the flexible body's degrees of freedom and its transpose and correction matrices, f a f is the aerodynamic load vector. i Let σ be the inertial load vector. a Let σ0 be the stress vector induced by aerodynamic load, and σ0 be the initial stress vector. i a1 is the stress vector induced by inertial load, and a2 is the constraint reaction force vector.

[0053] The integral method employs implicit Newmark-beta, determining the initial state (structural response at t=0) and external excitation of the blade hoisting system based on the simulation conditions, and providing the initial values ​​x0 for the acceleration, velocity, and displacement responses. and Set the time step Δt, set the values ​​of the parameters δ and β for the implicit Newmark-beta integration method, and calculate the integration constant: a0 = 1 / (βΔt) 2 ), a1=δ / (βΔt), a3=1 / 2β-1, a4=δ / β-1, a5=Δt / 2(δ / β-2), a6=Δt(1-δ), a7=δΔt;

[0054] Forming an effective stiffness matrix

[0055] The calculation of each time increment Δt is as follows:

[0056] The effective load at time t+Δt is:

[0057]

[0058] Solve for the displacement at time t+Δt:

[0059] Solve for the acceleration and velocity at time t+Δt:

[0060] The initial state for the next time step is determined based on the structural response at time t+Δt, and the iterative calculation continues until the calculation is completed.

[0061] In some embodiments, the wind turbine blade hoisting load simulation analysis method further includes the following steps: post-processing the hoisting load data to complete the load assessment. In specific implementation, the displacement response, velocity response, and acceleration response of each component and part of the blade hoisting system are obtained by solving the structural dynamics equations, thereby obtaining the hoisting load data. Statistical analysis can be performed on this data, and the load safety of the blade hoisting system can be assessed based on the results of the statistical analysis.

[0062] In some embodiments, the hoisting load data includes blade root bolt load data, rotor locking load data, gearbox load data, turning gear motor load data, yaw bearing load data, tower base bending moment load data, and tower top bending moment load data. More specifically, for the first to fourth simulation conditions, the hoisting load data to be examined includes blade root bolt load data, rotor locking load data, gearbox load data, turning gear motor load data, yaw bearing load data in the Mx direction, tower base bending moment load data in the Mx direction, and tower top bending moment load data in the Mx direction. The fifth simulation condition mainly analyzes the blade root bolt load data.

[0063] The simulation conditions provide parameters such as boundary conditions, system constraints, external load inputs, and response output types for the simulation analysis of the multibody coupling model. They also provide the basic settings for building the multibody coupling model and solving the structural dynamic equations. By clearly defining external excitations and boundary elements such as wind conditions, motion states, and connection conditions in different simulation conditions, the model can accurately calculate the dynamic response data of the blade hoisting system under the corresponding simulation conditions, thereby extracting the hoisting load analysis results of key parts such as blade root bolts, yaw bearings, and towers.

[0064] This invention also proposes a wind turbine blade hoisting load simulation analysis device 100, comprising:

[0065] The working condition generation module 200 is used to: define multiple simulation working conditions corresponding to multiple lifting scenarios based on the blade lifting scheme of the wind turbine generator set and multiple lifting scenarios;

[0066] The calculation module 300 is used to: use a multi-body coupling model based on the blade hoisting system to perform hoisting load simulation analysis based on multiple simulation conditions, and obtain hoisting load data for multiple simulation conditions. The multi-body coupling model includes the blade, the wind turbine main unit, the hoisting equipment, and the environmental wind conditions.

[0067] In some embodiments, the wind turbine blade hoisting load simulation analysis device further includes a post-processing module, which is used to: perform post-processing on the hoisting load data to complete the load assessment.

[0068] The present invention also proposes a storage medium storing a computer program, which, when executed by a processor, implements the wind turbine blade hoisting load simulation analysis method described in any of the above claims.

[0069] This invention provides a load simulation method that considers the entire process of single-blade installation for wind turbines. Single-blade installation can be divided into two methods: leading-edge forward installation and trailing-edge forward installation. Both methods include the horizontal installation of the first blade, single-blade rotation, horizontal installation of the second blade, rotation of both blades, and horizontal installation of the third blade. For trailing-edge forward installation, the process of changing the pitch angle from 180 degrees to 0 degrees after each blade installation needs to be considered. This simulation method, while including the above installation process, also considers the coupling of different safety factors for gravity loads and aerodynamic loads, the corresponding simulation software settings, and load post-processing analysis methods. This method covers the entire process of single-blade installation for large wind turbines, considering different safety factors for loads with different components such as aerodynamics and gravity, avoiding under-evaluation and over-evaluation of loads. It can accurately assess the load level of the blade and the entire turbine during installation, ensuring the load safety of the blade installation process.

[0070] This invention provides a simulation analysis method for wind turbine blade hoisting loads, covering two different hoisting schemes: single blade leading edge forward and single blade trailing edge forward. By defining various states of the hoisting scheme and solving the structural dynamics equations, the method completes the hoisting load assessment for special cases including turning gear motor failure and sudden wind speed changes, achieving a safety assessment of the blade and overall turbine loads during the hoisting process, reducing physical experiments and enhancing hoisting safety.

[0071] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A method for simulating and analyzing the lifting load of wind turbine blades, characterized in that, Includes the following steps: Based on the blade hoisting scheme and multiple hoisting scenarios of the wind turbine generator set, several simulation conditions corresponding to the multiple hoisting scenarios are defined; A multi-body coupling model based on the blade hoisting system was adopted, and hoisting load simulation analysis was performed based on multiple simulation conditions to obtain hoisting load data for multiple simulation conditions. The multi-body coupling model includes the blade, the wind turbine main unit, the hoisting equipment, and the environmental wind conditions.

2. The wind turbine blade hoisting load simulation analysis method according to claim 1, characterized in that, The blade hoisting scheme includes: the horizontal hoisting process of the first blade, the single blade rotation process, the horizontal hoisting process of the second blade, the double blade rotation process, and the horizontal hoisting process of the third blade.

3. The wind turbine blade hoisting load simulation analysis method according to claim 2, characterized in that, Multiple simulation conditions include the first simulation condition, the second simulation condition, the third simulation condition, the fourth simulation condition, and the fifth simulation condition; The first simulation condition includes: the root bolts of the first blade are tightened; the azimuth angle varies from 90 degrees to 210 degrees with a step size of 10 degrees; the wind direction varies from 0 degrees to 360 degrees with a step size of 1 degree; and the pitch angle varies from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a step size of 5 degrees. The second simulation condition includes: the root bolts of the first blade are tightened; the azimuth angles include 90 degrees, 180 degrees, and 210 degrees; the wind direction varies from 0 degrees to 360 degrees with a step size of 1 degree; the pitch angle varies from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a step size of 5 degrees; and the wind speed is the preset extreme wind speed multiplied by the preset wind speed safety factor. The third simulation condition includes: tightening the root bolts of the second blade; the azimuth angle changes from 210 degrees to 330 degrees with a change step of 10 degrees; the wind direction changes from 0 degrees to 360 degrees with a change step of 1 degree; and the pitch angle changes from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a change step of 5 degrees. The fourth simulation condition includes: the root bolts of the second blade are tightened; the azimuth angles include 210 degrees, 240 degrees, and 330 degrees; the wind direction varies from 0 degrees to 360 degrees with a step size of 1 degree; the pitch angle varies from 85 degrees to 95 degrees or from 180 degrees to 0 degrees with a step size of 5 degrees; and the wind speed is a preset extreme wind speed multiplied by a preset wind speed safety factor. The fifth simulation condition includes: the wind turbine is in standby mode, there is no power supply for yaw, and the root bolts of the third blade are tightened; the azimuth angle varies from 0 to 90 degrees with a step size of 30 degrees; the wind direction varies from 0 to 360 degrees with a step size of 1 degree; and the pitch angle varies from 85 to 95 degrees or from 180 to 0 degrees with a step size of 5 degrees.

4. The wind turbine blade hoisting load simulation analysis method according to claim 1, characterized in that, The simulation analysis of lifting loads based on multiple simulation conditions includes the following steps: Solve the structural dynamics equations based on the multibody coupling model and each of the simulation conditions. Calculate the dynamic response data of the blade hoisting system under each simulation condition; where M is the mass matrix of the blade hoisting system, C is the damping matrix of the blade hoisting system, and K is the stiffness matrix of the blade hoisting system. q and q are the displacement response, velocity response and acceleration response of the blade hoisting system at any time, respectively, and f is the time-varying external excitation acting on the blade hoisting system.

5. The wind turbine blade hoisting load simulation analysis method according to claim 4, characterized in that, It also includes the following steps: The implicit Newmark-beta integral method is used to solve the structural dynamics equations to obtain the dynamic response data of the blade hoisting system at each time step.

6. The wind turbine blade hoisting load simulation analysis method according to claim 1, characterized in that, The hoisting load data includes blade root bolt load data, wind turbine locking load data, gearbox load data, turning gear motor load data, yaw bearing load data, tower base bending moment load data, and tower top bending moment load data.

7. The wind turbine blade hoisting load simulation analysis method according to claim 1, characterized in that, It also includes the following steps: The hoisting load data is post-processed to complete the load assessment.

8. A simulation analysis device for wind turbine blade hoisting load, characterized in that, include: The working condition generation module is used to define multiple simulation working conditions corresponding to multiple lifting scenarios based on the blade lifting scheme and multiple lifting scenarios of the wind turbine generator set. The calculation module is used to: use a multi-body coupling model based on the blade hoisting system to perform hoisting load simulation analysis based on multiple simulation conditions, and obtain hoisting load data for multiple simulation conditions. The multi-body coupling model includes the blade, the wind turbine main unit, the hoisting equipment, and the environmental wind conditions.

9. The wind turbine blade hoisting load simulation analysis device according to claim 8, characterized in that, It also includes a post-processing module, which is used to: post-process the hoisting load data to complete the load assessment.

10. A storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the wind turbine blade hoisting load simulation analysis method as described in any one of claims 1-7.

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