A method and device for determining the safety of a wind turbine tower based on flange deflection

Abstract

The present application discloses a method and device for determining the safety of a wind turbine tower based on flange deflection, including obtaining model parameters corresponding to n sections of the wind turbine tower in N sections of the wind turbine tower, then calculating the sum of the first deflections corresponding to the concentrated force and the sum of the second deflections corresponding to the distributed force on the n sections of the wind turbine tower based on the model parameters, and then calculating the total deflection of the n sections of the wind turbine tower based on the sum of the first deflection and the sum of the second deflection, and finally determining the safety of the wind turbine tower according to the total deflection of the wind turbine tower. A method for determining the safety of a wind turbine tower based on flange deflection in an embodiment of the present application fully considers the operating environment of the wind turbine, and through a simple, efficient, fast and accurate calculation process, realizes the calculation of the flange deflection of the wind turbine tower under the action of wind force, improves the maintenance efficiency, and can determine the safety of the deformation of the wind turbine tower at the same time, so that timely maintenance can be carried out, ensuring stability in long-term use, and avoiding the occurrence of major safety accidents.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a method and device for determining the safety of a wind turbine tower based on flange deflection. Background Art

[0002] With the continuous advancement of science and technology, environmental protection has become one of the issues that people focus on. In order to solve the problem of air pollution, the generation of pollutants can be effectively reduced by replacing thermal power generation with clean and renewable new energy such as wind power. At the same time, with the rapid development of the wind power industry, this has prompted wind power equipment to continuously improve its safety and stability during operation. In a wind turbine, the function of the wind turbine tower is to support the nacelle and impeller, ensuring that each component can operate at a certain height, thereby ensuring that the wind turbine obtains sufficient wind energy, and then drives the generator to operate smoothly. Therefore, the wind turbine tower is an important part of the entire wind turbine, and the wind turbine tower will deform during operation. Therefore, whether the deformed wind turbine tower can continue to support the safe, normal and efficient operation of the wind turbine is an issue that needs to be focused on before the operation of the wind turbine.

[0003] The existing wind turbine tower is a cylindrical steel tower with a gradually changing wall thickness hollow cylindrical structure. The entire tower is divided into multiple sections, and each section is connected by a flange. Therefore, it is necessary to measure the deformation of each tower to judge the safety performance of the wind turbine tower. The current method for measuring tower deformation is mainly based on the finite element method. Although the finite element method is a commonly used method to solve deformation calculation problems in engineering, this method discretizes the continuous engineering structure into a calculation model composed of finite elements, and then uses the boundary nodes of the elements as discrete points. The required calculation workload is large, the cost is high, the reliability is low, and it is not convenient enough. Summary of the invention

[0004] The purpose of this application is to solve one of the above-mentioned technical problems at least to a certain extent.

[0005] To this end, the first purpose of the present invention is to propose a method for determining the safety of a wind turbine tower based on flange deflection. By simplifying the calculation process of the deformation of the wind turbine tower, a more concise, efficient, rapid and accurate calculation of the flange deflection of the wind turbine tower under wind force is achieved, thereby improving the work efficiency of the maintenance process. At the same time, by comparing the obtained flange deflection with a preset safety range, the safety of the deformation of the wind turbine tower can be quickly and timely determined, thereby timely repairing the wind turbine, ensuring the stability and safety of the wind turbine during long-term use, and avoiding the occurrence of major safety accidents.

[0006] The second objective of the present application is to propose a device for determining the safety of a wind turbine tower based on flange deflection.

[0007] The third objective of the present application is to provide an electronic device.

[0008] A fourth objective of the present application is to provide a computer-readable storage medium.

[0009] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for determining the safety of a wind turbine tower based on flange deflection, comprising:

[0010] Get the model parameters corresponding to the n-th tower section in the N-th wind turbine tower section, 1≤n≤N;

[0011] Calculate the sum of the first deflections corresponding to the concentrated forces on the n-section tower based on the model parameters;

[0012] Calculate the sum of the second deflections corresponding to the distributed forces on the n-section tower based on the model parameters;

[0013] Obtaining the total deflection of the n-segment wind turbine tower based on the sum of the first deflection and the sum of the second deflection;

[0014] The safety of the wind turbine tower is determined based on the total deflection.

[0015] Optionally, calculating the sum of first deflections corresponding to concentrated forces on n sections of the tower based on the model parameters includes:

[0016] The model parameters include the concentrated force F,

[0017] The sum of the first deflection is calculated using the concentrated force F and formula 1: Among them, α 1 Represents the first flange coefficient; ζ i represents the first section influence coefficient of the i-th section of the tower; F represents the concentrated force on the i-th section of the tower; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i represents the inner diameter of the lower flange of the i-th tower section; ζ i Represents the first section influence coefficient of the i-th tower section.

[0018] Optionally, the method includes:

[0019] The first section influence coefficient is calculated using formula 2: Among them, i represents the first section influence coefficient of the i-th tower section; is the height coefficient, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0020] Optionally, calculating the sum of the second deflections corresponding to the distributed forces on the n-segment wind turbine tower based on the model parameters includes:

[0021] The model parameters include the distributed force q,

[0022] The sum of the second deflection is calculated using the distributed force q and formula 3: Among them, α 2 Indicates the second flange coefficient; ζ i ' represents the influence coefficient of the second section of the tower in the i-th section; q represents the distributed force on the tower in the i-th section; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i Represents the inner diameter of the lower flange of the i-th tower section.

[0023] Optionally, the method includes:

[0024] The second section influence coefficient is calculated using formula 4: Among them, i ' represents the second section influence coefficient of the i-th tower; is the height coefficient of the i-th tower section, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0025] Optionally, obtaining the total deflection of the n-segment wind turbine tower based on the sum of the first deflection and the sum of the second deflection includes:

[0026] The total deflection of the wind turbine tower in sections n is calculated using Formula 5: f F合力 =f F集中力 +f F分布力 .

[0027] Optionally, the safety of the wind turbine tower is determined based on the total deflection, including:

[0028] Determine whether the total deflection is within the preset range;

[0029] If it is within the preset range, the wind turbine tower is determined to be safe;

[0030] If it is not within the preset range, it is determined that the wind turbine tower is unsafe.

[0031] A method for determining the safety of a wind turbine tower based on flange deflection in an embodiment of the present application obtains model parameters corresponding to n sections of an N-section wind turbine tower, and then calculates the sum of the first deflections corresponding to the concentrated force and the sum of the second deflections corresponding to the distributed force received by the n sections of the tower based on the model parameters, and then obtains the total deflection of the n sections of the wind turbine tower based on the sum of the first deflection and the sum of the second deflection. Finally, the safety of the wind turbine tower is determined based on the total deflection, which simplifies the calculation process of the wind turbine tower deflection and can more concisely, efficiently, quickly and accurately realize the calculation of the flange deflection of the wind turbine tower under the action of wind force, thereby providing data support for ensuring the stability and safety of the wind turbine during long-term use.

[0032] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a device for determining the safety of a wind turbine tower based on flange deflection, comprising:

[0033] An acquisition module is used to obtain model parameters corresponding to n sections of a wind turbine tower, where 1≤n≤N.

[0034] A first calculation module is used to calculate the sum of first deflections corresponding to concentrated forces on n sections of the tower based on model parameters;

[0035] A second calculation module is used to calculate the sum of the second deflections corresponding to the distributed forces on the n-section tower based on the model parameters;

[0036] A third calculation module, used for obtaining a total deflection of the n-segment wind turbine tower based on the sum of the first deflection and the sum of the second deflection;

[0037] A determination module is used to determine the safety of the wind turbine tower according to the total deflection.

[0038] Optionally, a first calculation module is used to calculate the sum of first deflections corresponding to concentrated forces acting on n sections of the tower based on the model parameters, including:

[0039] The model parameters include the concentrated force F,

[0040] The sum of the first deflection is calculated using the concentrated force F and formula 1: Among them, α 1 Represents the first flange coefficient; ζ i represents the first section influence coefficient of the i-th section of the tower; F represents the concentrated force on the i-th section of the tower; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i represents the inner diameter of the lower flange of the i-th tower section; ζ i represents the first section influence coefficient of the i-th tower section;

[0041] Optionally, the first calculation module is used to calculate the first section influence coefficient using Formula 2: Among them, i represents the first section influence coefficient of the i-th tower section; is the height coefficient, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0042] Optionally, a second calculation module is used to calculate the sum of second deflections corresponding to the distributed forces on the n-section tower based on the model parameters, including:

[0043] The model parameters include the distributed force q,

[0044] The sum of the second deflection is calculated using the distributed force q and formula 3: Among them, α 2 Indicates the second flange coefficient; ζ i ' represents the influence coefficient of the second section of the tower in the i-th section; q represents the distributed force on the tower in the i-th section; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i It represents the inner diameter of the lower flange of the i-th tower section;

[0045] Optionally, the second calculation module is used to calculate the second section influence coefficient using Formula 4: Among them, i ' represents the second section influence coefficient of the i-th tower; is the height coefficient of the i-th tower section, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0046] Optionally, a third calculation module is used to obtain the total deflection of the n-segment wind turbine tower based on the sum of the first deflection and the sum of the second deflection, including:

[0047] The total deflection of the wind turbine tower in sections n is calculated using Formula 5: f F合力 =f F集中力 +f F分布力 .

[0048] Optionally, a determination module is used to determine the safety of the wind turbine tower according to the total deflection, including:

[0049] Determine whether the total deflection is within the preset range;

[0050] If it is within the preset range, the wind turbine tower is determined to be safe;

[0051] If it is not within the preset range, it is determined that the wind turbine tower is unsafe.

[0052] A device for determining the safety of a wind turbine tower based on flange deflection in an embodiment of the present application obtains model parameters corresponding to n sections of an N-section wind turbine tower, and then calculates the sum of the first deflections corresponding to the concentrated force and the sum of the second deflections corresponding to the distributed force received by the n sections of the tower based on the model parameters, and then obtains the total deflection of the n sections of the wind turbine tower based on the sum of the first deflection and the sum of the second deflection. Finally, the safety of the wind turbine tower is determined based on the total deflection, which simplifies the calculation process of the wind turbine tower deflection and can more concisely, efficiently, quickly and accurately realize the calculation of the flange deflection of the wind turbine tower under the action of wind force, thereby providing data support for ensuring the stability and safety of the wind turbine during long-term use.

[0053] To achieve the above-mentioned objectives, the third aspect embodiment of the present application proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a method for determining the safety of a wind turbine tower based on flange deflection of the first aspect embodiment of the present application is implemented.

[0054] To achieve the above-mentioned objectives, the fourth aspect of the present application proposes a computer-readable storage medium. When the computer program is executed by the processor, a method for determining the safety of a wind turbine tower based on flange deflection of the first aspect of the present application is implemented.

[0055] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0057] Figure 1 A flow chart of a method for determining wind turbine tower safety based on flange deflection according to an embodiment is presented;

[0058] Figure 2 A flowchart of a method for determining the safety of a wind turbine tower based on flange deflection according to a specific embodiment is presented;

[0059] Figure 3 A schematic structural diagram of a wind turbine tower according to a specific embodiment is shown;

[0060] Figure 4 A structural diagram of a device for determining wind turbine tower safety based on flange deflection according to an embodiment is shown. DETAILED DESCRIPTION

[0061] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0062] The present invention is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0063] A method and device for determining the safety of a wind turbine tower based on flange deflection according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0064] Figure 1 : is a flow chart of a method for determining the safety of a wind turbine tower based on flange deflection according to an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0065] S1, obtain the model parameters corresponding to n sections of the N-section wind turbine tower, 1≤n≤N.

[0066] Specifically, the entire wind turbine tower is divided into N sections. According to the requirements of wind turbine deformation safety, n sections of wind turbine tower are selected, and each section of the n wind turbine tower is numbered i from bottom to top in the vertical direction, where 1≤i≤n. Each section of the n wind turbine tower is connected by a flange, where the diameter of the lower flange of the i-th wind turbine tower is h. i , the upper flange diameter is h i+1 Furthermore, by measuring the model parameters of the n-section wind turbine tower, the precise parameter values ​​of the wind farm and its wind turbines can be obtained, thereby ensuring the accuracy of subsequent calculation results.

[0067] S2, calculating the sum of the first deflections corresponding to the concentrated forces acting on the n-section tower based on the model parameters.

[0068] Specifically, the sum of the first deflection is calculated using the model parameter concentrated force F and formula 1: Among them, α 1 Represents the first flange coefficient; ζ i represents the first section influence coefficient of the i-th section of the tower; F represents the concentrated force on the i-th section of the tower; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, di represents the inner diameter of the lower flange of the i-th tower section; ζ i Represents the first section influence coefficient of the i-th tower section.

[0069] Among them, the first section influence coefficient can be calculated using Formula 2: Among them, i represents the first section influence coefficient of the i-th tower section; is the height coefficient, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0070] S3, calculating the sum of the second deflections corresponding to the distributed forces on the n-segment tower based on the model parameters.

[0071] Specifically, the sum of the second deflection is calculated using the model parameter distributed force q and formula 3: Among them, α 2 Indicates the second flange coefficient; ζ i ' represents the influence coefficient of the second section of the tower in the i-th section; q represents the distributed force on the tower in the i-th section; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i Represents the inner diameter of the lower flange of the i-th tower section.

[0072] Among them, the second section influence coefficient can be calculated using formula 4: Among them, i ' represents the second section influence coefficient of the i-th tower; is the height coefficient of the i-th tower section, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0073] Based on the stress conditions of the wind turbine tower, it can be known that because the wind turbine tower is mainly subjected to concentrated wind force and distributed wind force, the wind force is transmitted to the flange through the wind turbine tower, and the flange is deflected by the wind force. Therefore, the deformation of the wind turbine tower under concentrated force and distributed force can be obtained by calculating the deflection of the flange connection. Therefore, the deflection value of the tower flange under the influence of concentrated force and distributed force can be obtained through the above internal force calculation formula. Compared with the cumbersome and inefficient finite element method, this calculation formula simplifies the calculation process through force decomposition and internal force calculation, and the required parameters can be accurately measured through field measurements. It can conveniently, efficiently, quickly and accurately obtain the deformation of the wind turbine tower when it is subjected to concentrated force and distributed force, thereby saving a lot of time and cost and improving the overall work efficiency during the operation.

[0074] S4, obtaining the total deflection of the n-segment wind turbine tower based on the sum of the first deflection and the sum of the second deflection.

[0075] Specifically, the total deflection of the n-segment wind turbine tower is calculated using Formula 5:

[0076]

[0077] Through the above calculation process, the flange deflection of the wind turbine tower under the influence of concentrated force and distributed force can be integrated, so as to obtain the flange deflection of the wind turbine tower under the influence of concentrated force and distributed force, and then obtain the deformation of the wind turbine tower under the influence of wind force. The calculation process is simple, reliable and easy to apply, which reduces the time cost of staff's understanding and execution, thereby improving the overall work efficiency.

[0078] S5, determine the safety of the wind turbine tower based on the total deflection.

[0079] Specifically, it is determined whether the total deflection of the wind turbine tower is within a preset range; if it is within the preset range, the wind turbine tower is determined to be safe; if it is not within the preset range, the wind turbine tower is determined to be unsafe.

[0080] In one embodiment, the preset safety range of the i-th section wind turbine tower is 0.5%-0.8% of the height of the i-th section wind turbine tower. Assuming that the height of the i-th section wind turbine tower is 50m, the preset safety range of the deflection of the i-th section wind turbine tower is 0.25-0.4m. When the deflection obtained by S4 is within the range, such as 0.27m, it can be determined that the wind turbine tower is safe. If the deflection is outside the range, such as 0.55m, it can be determined that the deformation of the wind turbine tower is not safe, and the flange structure needs to be repaired to ensure the normal operation of the wind turbine.

[0081] Through the above determination process, the flange deflection obtained by S4 can be compared with the preset safety range, and the safety of the wind turbine tower deformation can be determined quickly and timely, so that the wind turbine can be repaired in time, the flange structure can be adjusted and improved, and the stability and safety of the wind turbine during long-term use can be ensured, and major safety accidents can be avoided.

[0082] A method for determining the safety of a wind turbine tower based on flange deflection in an embodiment of the present application obtains model parameters corresponding to n sections of an N-section wind turbine tower, and then calculates the sum of the first deflections corresponding to the concentrated force and the sum of the second deflections corresponding to the distributed force received by the n sections of the tower based on the model parameters, and then obtains the total deflection of the n sections of the wind turbine tower from the sum of the first deflection and the sum of the second deflection. Finally, the safety of the wind turbine tower is determined based on the total deflection, which simplifies the calculation process of the wind turbine tower deflection and can more concisely, efficiently, quickly and accurately realize the calculation of the flange deflection of the wind turbine tower under the action of wind force, thereby providing data support for ensuring the stability and safety of the wind turbine during long-term use.

[0083] In a specific embodiment, Figure 2 As shown in the figure, the implementation steps of a method for determining the safety of a wind turbine tower based on flange deflection in actual engineering are as follows:

[0084] S201: Obtain relevant parameters of the wind turbine tower.

[0085] Among them, in particular, it is assumed that the upper section of the wind turbine tower is subjected to force, so the parameters required for calculating the deflection value of the upper section of the wind turbine tower are obtained, including: flange coefficient, elastic modulus and Poisson's ratio of the wind turbine tower, number of wind turbine tower sections, wind turbine hub height, height of each section of the wind turbine tower, top diameter of the wind turbine tower, bottom diameter of the wind turbine tower, outer diameter and inner diameter length of the lower flange of the upper section of the wind turbine tower, and concentrated force and distributed force on the upper section of the wind turbine tower.

[0086] Specifically, in this embodiment, the wind farms are all arranged on the mountain, so the flange coefficient α 1 , α 2 The average value is 1.05.

[0087] In addition, the wind farm uses a 2.5MW wind turbine, and the yield strength of the wind turbine material is 325MPa, so the elastic modulus of the wind turbine tower is E=2.0×10 11 N / m 2 , Poisson's ratio ν = 0.3, from which the shear modulus can be obtained

[0088] Furthermore, if Figure 3As shown in the figure, the wind turbine tower is a cylindrical steel tower with a gradually changing wall thickness hollow cylindrical structure. The entire tower is divided into two sections, and each section is connected by a flange. After exploration and measurement, it was found that the wind turbine hub height is 65m, the height of the upper tower section of the wind turbine is 30m, and the height of the lower tower section of the wind turbine is 35m. Here, it is assumed that the wind turbine tower diameter changes evenly along the height direction. According to the measured parameters, the top diameter of the tower is 4m, and the bottom diameter of the tower is 6m. Then, the lower flange diameter h of the upper tower section of the wind turbine is i According to the uniform change rule, it can be calculated to be 4.92m. Then, the upper flange diameter h of the upper tower of the wind turbine is i+1 is 4m, the height coefficient of the upper tower flange of the wind turbine can be obtained At the same time, the moment of inertia can be obtained by measuring the outer diameter D and inner diameter d of the lower flange of the upper tower of the wind turbine.

[0089] In addition, the upper section of the wind turbine tower is subjected to stress, and its stress distribution diagram is shown in the figure below: Figure 3 As shown, it is divided into a concentrated force acting on the top of the wind turbine tower and a distributed force acting on the side of the upper section of the wind turbine tower. Through exploration and measurement, the magnitude of the concentrated force F is 100KN and the magnitude of the distributed force q is 10KN / m.

[0090] S202: Calculate the flange deflection under the concentrated force F.

[0091] Specifically, the calculation formula for the deflection of the upper section of the wind turbine tower under the action of concentrated force F is:

[0092]

[0093] In the formula

[0094] Substituting the value of S201, we can get f F集中力 =0.254m.

[0095] S203: Calculate the flange deflection under the distributed force q.

[0096] Specifically, the calculation formula for the deflection of the upper section of the wind turbine tower under the action of the distributed force q is:

[0097]

[0098] In the formula

[0099] Substituting the value of S201, we can get f F分布力 =0.124m.

[0100] S204: Calculate the flange deflection under the action of the combined force.

[0101] Specifically, the calculation formula for the deflection of the upper section of the wind turbine tower under the combined force of the concentrated force F and the distributed force q is: F合力 =f F集中力 +f F分布力 =0.254+0.124=0.369m

[0102] S205: Calculate the safety flange deflection range and determine the safety of the wind turbine tower.

[0103] Specifically, the deflection range of the safety flange of the upper section of the wind turbine tower is 0.5%-0.8% of the height of the upper section of the wind turbine tower, that is, 0.325-0.52m. F合力 is 0.369m, which is within the safe range of flange deflection, so the wind turbine tower is safe. F合力 If the value is outside this range, such as 0.6m, the wind turbine tower is not safe and the flange structure needs to be inspected to ensure the normal operation of the wind turbine.

[0104] Therefore, the above specific embodiment is particularly suitable for the situation where the flange is not completely rigidly connected and the influence of variable cross-section is considered. After the wind farm is surveyed and the values ​​of various parameters are measured, the flange deflection of the section subjected to concentrated force and distributed force is calculated for the force-bearing section of the wind turbine tower, and the flange deflection under the combined force is obtained after adding, so as to judge the deformation of the wind turbine tower under the force, and then determine the safety of the wind turbine tower by comparing with the safety range. Therefore, the staff can quickly, efficiently, accurately and conveniently confirm the safety of the deformation of the wind turbine tower without spending time to understand, which solves the troubles of cumbersome process and table lookup calculation when calculating the deformation internal force of the variable cross-section wind turbine tower in the past.

[0105] In order to implement the above-mentioned embodiment, the present application also proposes a device for determining the safety of a wind turbine tower based on flange deflection.

[0106] Figure 4 It is a structural diagram of a wind turbine tower safety determination device based on flange deflection according to an embodiment of the present application.

[0107] like Figure 4 As shown, a device for determining the safety of a wind turbine tower based on flange deflection includes an acquisition module 41 , a first calculation module 42 , a second calculation module 43 , a third calculation module 44 , and a determination module 45 .

[0108] The acquisition module 41 is used to obtain model parameters corresponding to n sections of the N-section wind turbine tower, 1≤n≤N.

[0109] The first calculation module 42 is used to calculate the sum of first deflections corresponding to the concentrated forces acting on the n-section tower based on the model parameters.

[0110] The first calculation module 42 is specifically used to calculate the sum of the first deflection by using the concentrated force F and formula 1 after obtaining the model parameter concentrated force F, where formula 1 is: Among them, α 1 Represents the first flange coefficient; ζ i represents the first section influence coefficient of the i-th section of the tower; F represents the concentrated force on the i-th section of the tower; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i represents the inner diameter of the lower flange of the i-th tower section; ζ i represents the first section influence coefficient of the i-th section of the tower. The first section influence coefficient ζ can be calculated using formula 2: i . Use Formula 2 to calculate the first section influence coefficient: Among them, i represents the first section influence coefficient of the i-th tower section; is the height coefficient, h i+1 Indicates the upper flange diameter of the i-th tower section, h i Represents the lower flange diameter of the i-th tower section.

[0111] The second calculation module 43 is used to calculate the sum of the second deflections corresponding to the distributed forces acting on the n-section tower based on the model parameters.

[0112] The second calculation module 43 is specifically used to calculate the sum of the second deflection using the distributed force q and formula 3 after obtaining the model parameter distributed force q, formula 3: Among them, α 2 Indicates the second flange coefficient; ζ i ' represents the influence coefficient of the second section of the tower in the i-th section; q represents the distributed force on the tower in the i-th section; H i represents the height of the i-th tower section; E represents the elastic modulus; is the shear modulus, υ represents the Poisson’s ratio; is the moment of inertia of the i-th tower section, D i Indicates the outer diameter of the lower flange of the i-th tower section, d i It represents the inner diameter of the lower flange of the i-th tower. The first section influence coefficient ζ can be calculated using formula 4: i '. Formula 4: Among them, i ' represents the second section influence coefficient of the i-th tower; is the height coefficient of the i-th tower section, h i+1 Indicates the upper flange diameter of the i-th tower section, hi Represents the lower flange diameter of the i-th tower section.

[0113] The third calculation module 44 is used to obtain the total deflection of the n-segment wind turbine tower based on the sum of the first deflections and the sum of the second deflections.

[0114] The third calculation module 44 is specifically used to calculate the deflection of the i-th section wind turbine tower using Formula 5: f F合力 =f F集中力 +f F分布力 .

[0115] The determination module 45 is used to determine the safety of the wind turbine tower according to the total deflection.

[0116] The determination module 45 is specifically used to: determine whether the total deflection is within a preset range; if it is within the preset range, determine that the wind turbine tower is safe; if it is not within the preset range, determine that the wind turbine tower is unsafe.

[0117] It should be understood that a device for determining the safety of a wind turbine tower based on flange deflection is consistent with the description of a corresponding method for determining the safety of a wind turbine tower based on flange deflection, and thus will not be described in detail in this embodiment.

[0118] A device for determining the safety of a wind turbine tower based on flange deflection in an embodiment of the present application obtains model parameters corresponding to n sections of an N-section wind turbine tower, and then calculates the sum of the first deflections corresponding to the concentrated force and the sum of the second deflections corresponding to the distributed force received by the n sections of the tower based on the model parameters, and then obtains the total deflection of the n sections of the wind turbine tower based on the sum of the first deflection and the sum of the second deflection. Finally, the safety of the wind turbine tower is determined based on the total deflection, which simplifies the calculation process of the wind turbine tower deflection and can more concisely, efficiently, quickly and accurately realize the calculation of the flange deflection of the wind turbine tower under the action of wind force, thereby providing data support for ensuring the stability and safety of the wind turbine during long-term use.

[0119] In order to implement the above embodiments, the present application also proposes a computer device.

[0120] The computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a method for determining the safety of a wind turbine tower based on flange deflection as described in the first aspect of the embodiment is implemented.

[0121] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium.

[0122] The computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, a method for determining the safety of a wind turbine tower based on flange deflection according to an embodiment of the first aspect is implemented.

[0123] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0124] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0125] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0126] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Claims

1. A method for determining the safety of a wind turbine tower based on flange deflection, characterized in that: include: Get the model parameters corresponding to the n-th tower section in the N-th wind turbine tower section, 1≤n≤N; Calculate the sum of the first deflections corresponding to the concentrated forces on the n-section tower based on the model parameters; Calculate the sum of the second deflections corresponding to the distributed forces on the n-section tower based on the model parameters; Obtaining a total deflection of the n-segment wind turbine tower based on the sum of the first deflections and the sum of the second deflections; Determining the safety of the wind turbine tower according to the total deflection; The model parameters include concentrated force F, The sum of the first deflections is calculated using the concentrated force F and formula 1: , in, represents the first flange coefficient, Indicates The first section influence coefficient of the tower section, Indicates The concentrated force on the tower section is Indicates The height of the tower section, represents the elastic modulus, is the shear modulus, represents Poisson's ratio, For the The moment of inertia of the tower section, Indicates The outer diameter of the lower flange of the tower section, Indicates The inner diameter of the lower flange of the tower section; The first cross-section influence coefficient is calculated using Formula 2: , in, is the height coefficient, Indicates The upper flange diameter of the tower section, Indicates The lower flange diameter of the tower section; The model parameters include the distributed force q, The sum of the second deflection is calculated using the distributed force q and formula 3, formula 3: , in, represents the second flange coefficient, Indicates The second section influence coefficient of the tower section, Indicates Distributed forces on the tower section; The second cross-section influence coefficient is calculated using formula 4: .

2. A method for determining wind turbine tower safety based on flange deflection according to claim 1, characterized in that: Obtaining a total deflection of the n-segment wind turbine tower based on the sum of the first deflection and the sum of the second deflection, comprising: The total deflection of the n-section wind turbine tower is calculated using Formula 5: .

3. A method for determining wind turbine tower safety based on flange deflection according to claim 1, characterized in that: The safety of the wind turbine tower is determined based on the total deflection, including: Determining whether the total deflection is within a preset range; If it is within the preset range, it is determined that the wind turbine tower is safe; If it is not within the preset range, it is determined that the wind turbine tower is unsafe.

4. A device for determining the safety of a wind turbine tower based on flange deflection, characterized in that: include: An acquisition module is used to obtain model parameters corresponding to n sections of a wind turbine tower, 1≤n≤N; A first calculation module, used for calculating the sum of first deflections corresponding to concentrated forces acting on n sections of the tower based on the model parameters; A second calculation module, used for calculating the sum of second deflections corresponding to the distributed forces exerted on the n-section tower based on the model parameters; A third calculation module, configured to obtain a total deflection of the n-segment wind turbine tower based on the sum of the first deflections and the sum of the second deflections; A determination module, used to determine the safety of the wind turbine tower according to the total deflection; The first calculation module is used to calculate the sum of the first deflections corresponding to the concentrated forces acting on the n-section tower based on the model parameters, including: The model parameters include concentrated force F, The sum of the first deflections is calculated using the concentrated force F and formula 1: ,in, represents the first flange coefficient, Indicates The first section influence coefficient of the tower section, Indicates The concentrated force on the tower section is Indicates The height of the tower section, represents the elastic modulus, is the shear modulus, represents Poisson's ratio, For the The moment of inertia of the tower section, Indicates The outer diameter of the lower flange of the tower section, Indicates The inner diameter of the lower flange of the tower section; The first cross-section influence coefficient is calculated using Formula 2: ,in, is the height coefficient, Indicates The upper flange diameter of the tower section, Indicates The lower flange diameter of the tower section; The second calculation module is used to calculate the sum of the second deflections corresponding to the distributed forces on the n-section tower based on the model parameters, including: The model parameters include the distributed force q, The sum of the second deflection is calculated using the distributed force q and formula 3, formula 3: ,in, represents the second flange coefficient, Indicates The second section influence coefficient of the tower section, Indicates Distributed forces on the tower section; The second cross-section influence coefficient is calculated using formula 4: .

5. The device for determining wind turbine tower safety based on flange deflection according to claim 4, characterized in that: The third calculation module is used to obtain the total deflection of the n-segment wind turbine tower based on the sum of the first deflections and the sum of the second deflections, including: The total deflection of the n-section wind turbine tower is calculated using Formula 5: .

6. The device for determining wind turbine tower safety based on flange deflection according to claim 4, characterized in that: The determination module is used to determine the safety of the wind turbine tower according to the total deflection, including: Determining whether the total deflection is within a preset range; If it is within the preset range, it is determined that the wind turbine tower is safe; If it is not within the preset range, it is determined that the wind turbine tower is unsafe.

7. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a method for determining the safety of a wind turbine tower based on flange deflection as described in any one of claims 1 to 3 is implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, a method for determining the safety of a wind turbine tower based on flange deflection according to any one of claims 1 to 3 is implemented.

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