Wind turbine generator structure optimization method, device and equipment and storage medium

Abstract

The invention discloses a wind turbine generator structure optimization method and device, equipment and a storage medium, and relates to the technical field of wind turbine generator modeling, and the method comprises the steps: building a basic three-dimensional model of a bearing seat and main frame integrated structure based on a bearing seat region and a main frame region of a wind turbine generator and related connection interfaces; establishing a finite element model of the overall structure of the wind turbine generator according to the basic three-dimensional model; unit forces and moments in different directions are applied to the finite element model according to preset working conditions, so that the weighted flexibility and mass of the basic three-dimensional model under each working condition are calculated; and optimizing the weighted flexibility of the finite element model corresponding to the basic three-dimensional model based on a preset material quality upper limit to obtain a target three-dimensional model so as to optimize the bearing pedestal and main frame integrated structure of the wind turbine generator. In this way, the flexibility of the structure of the wind turbine generator serves as the optimization target to optimize and adjust the corresponding integrated structure, and the wind turbine generator structure with the higher material utilization rate can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine modeling, and in particular to a method, device, equipment and storage medium for optimizing the structure of a wind turbine. Background Art

[0002] With the maturity and development of wind power industry technology, wind turbines are showing a development trend of high towers, long blades, large capacity, and deep sea. The bearing seat and main frame are two key structural parts in wind turbines. The main bearing and main shaft are installed in the bearing seat. The main frame connects the bearing seat, rear frame and tower together. The two are connected by flanges, so that the wind rotor load is transmitted to the bearing seat, connecting bolts and main frame through the main shaft. As the power of the unit continues to increase, the stiffness and strength of the bearing seat, main frame and connecting bolts must also be increased accordingly, which brings challenges to the structural design of the unit.

[0003] The current design method for the main frame and bearing seat of large-megawatt wind turbines is still based on the split structure, and the connecting bolts, main frame, and bearing seat are designed separately, which has the problems of complex design process and long cycle.

[0004] It can be seen that how to improve the structural design efficiency of the main frame and the bearing seat of the wind turbine generator set is a problem to be solved in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method, device, equipment and storage medium for optimizing the structure of a wind turbine, taking the flexibility of the structure of the wind turbine as the optimization target to optimize and adjust the corresponding integrated structure, so as to obtain a wind turbine structure with higher material utilization. The specific scheme is as follows:

[0006] In a first aspect, the present application provides a method for optimizing the structure of a wind turbine generator system, comprising:

[0007] A basic three-dimensional model of the integrated structure of the bearing seat and the main frame is established based on the bearing seat area and the main frame area of ​​the wind turbine and the related connection interfaces;

[0008] A finite element model of the overall structure of the wind turbine generator set is established based on the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and other spatial entity structures of the wind turbine generator set;

[0009] Applying unit forces and moments in different directions to the finite element model according to preset working conditions to respectively calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition;

[0010] The weighted flexibility of the finite element model corresponding to the basic three-dimensional model is optimized based on the preset material mass upper limit to obtain a target three-dimensional model that meets the preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and main frame of the wind turbine according to the target three-dimensional model.

[0011] Optionally, the basic three-dimensional model of the integrated structure of the bearing seat and the main frame is established based on the bearing seat area and the main frame area of ​​the wind turbine generator set and the related connection interfaces, including:

[0012] A cylindrical structure with the main shaft axis as the rotation axis is established based on the bearing seat area of ​​the wind turbine generator set, and a cylindrical structure with the tower axis as the rotation axis is established based on the main frame area of ​​the wind turbine generator set, so as to combine the bearing seat area, the main frame area and related connection interfaces to obtain a basic three-dimensional model of an integrated structure; the front end surface of the cylindrical structure corresponding to the bearing seat area is located between the front bearing and the hub.

[0013] Optionally, establishing a finite element model of the overall structure of the wind turbine generator set according to the basic three-dimensional model includes:

[0014] A finite element model corresponding to the overall structure is established according to the material parameters and contact relationship of the basic three-dimensional model and the overall structure of the wind turbine generator set.

[0015] Optionally, applying unit forces and moments in different directions to the finite element model according to a preset working condition includes:

[0016] Determine other regions in the finite element model except the interface portion of the spatial entity of the wind turbine generator set as regions to be optimized;

[0017] Unit forces and moments in different directions are applied to the hub center in the to-be-optimized area of ​​the finite element model according to preset working conditions.

[0018] Optionally, the optimizing the weighted compliance of the finite element model corresponding to the basic three-dimensional model based on a preset material mass upper limit to obtain a target three-dimensional model that meets a preset strength verification condition includes:

[0019] The bearing seat and main frame integrated structure corresponding to the basic three-dimensional model is adjusted based on a preset material mass upper limit to obtain an adjusted bearing seat and main frame integrated structure corresponding to a minimum weighted flexibility, and an optimized three-dimensional model corresponding to the adjusted bearing seat and main frame integrated structure is determined;

[0020] The optimized three-dimensional model is verified according to a preset strength verification condition to obtain a target three-dimensional model that meets the preset strength verification condition.

[0021] Optionally, adjusting the integrated structure of the bearing seat and the main frame corresponding to the basic three-dimensional model based on a preset material quality upper limit includes:

[0022] Based on the preset material quality upper limit, materials or functional structures are added to the integrated structure of the bearing seat and the main frame corresponding to the basic three-dimensional model.

[0023] Optionally, the verifying the optimized three-dimensional model according to a preset strength verification condition to obtain a target three-dimensional model that meets the preset strength verification condition includes:

[0024] Respectively performing ultimate strength verification and fatigue strength verification on the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model to obtain corresponding first verification results and second verification results;

[0025] If the first verification result indicates that the actual stress of the ultimate strength verification is less than a first preset threshold, and the second verification result indicates that the fatigue damage of the fatigue strength verification is lower than a second preset threshold, the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model is determined to be the bearing seat and main frame integrated structure corresponding to the target three-dimensional model that meets the preset strength verification conditions;

[0026] If the first verification result indicates that the actual stress of the ultimate strength verification is not less than the first preset threshold, and / or the second verification result indicates that the fatigue damage of the fatigue strength verification is not less than the second preset threshold, then based on the preset material quality upper limit, the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model continue to be adjusted, and jump to the step of performing ultimate strength verification and fatigue strength verification on the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model respectively to obtain the corresponding first verification result and second verification result.

[0027] In a second aspect, the present application provides a wind turbine structure optimization device, comprising:

[0028] A three-dimensional model building module is used to build a basic three-dimensional model of the integrated structure of the bearing seat and the main frame based on the bearing seat area and the main frame area of ​​the wind turbine and the related connection interfaces;

[0029] A finite element model building module, used to build a finite element model of the overall structure of the wind turbine generator set according to the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and other spatial entities of the wind turbine generator set;

[0030] A working condition calculation module, used for applying unit forces and moments in different directions to the finite element model according to preset working conditions, so as to respectively calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition;

[0031] A structural optimization module is used to optimize the weighted flexibility of the finite element model corresponding to the basic three-dimensional model based on a preset material quality upper limit to obtain a target three-dimensional model that meets preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and main frame of the wind turbine according to the target three-dimensional model.

[0032] In a third aspect, the present application provides an electronic device, including:

[0033] Memory, used to store computer programs;

[0034] A processor is used to execute the computer program to implement the wind turbine structure optimization method as described above.

[0035] In a fourth aspect, the present application provides a computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the wind turbine structure optimization method as described above.

[0036] It can be seen that the present application first establishes a basic three-dimensional model of the integrated structure of the bearing seat and the main frame based on the bearing seat area and the main frame area of ​​the wind turbine generator set and the related connection interface; then establishes a finite element model of the overall structure of the wind turbine generator set based on the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and the structure of other spatial entities of the wind turbine generator set; then, unit forces and moments in different directions are applied to the finite element model according to the preset working conditions to calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition respectively; then, the weighted flexibility of the finite element model corresponding to the basic three-dimensional model is optimized based on the preset material mass upper limit to obtain a target three-dimensional model that meets the preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and the main frame of the wind turbine generator set according to the target three-dimensional model. In this way, the present application is to establish a basic three-dimensional model of the integrated structure of the bearing seat and the main frame, improve the connection reliability, simplify the process, and improve the efficiency of structural design; and by constraining the overall quality of the structure, the flexibility of the structure is used as the optimization target to optimize the integrated structure, so as to obtain an integrated structure with higher material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0038] Figure 1A flow chart of a wind turbine structure optimization method disclosed in this application;

[0039] Figure 2 A flow chart of a specific wind turbine structure optimization method disclosed in this application;

[0040] Figure 3 A schematic diagram of a specific basic three-dimensional model disclosed in this application;

[0041] Figure 4 A specific interface schematic diagram disclosed in this application;

[0042] Figure 5 A schematic diagram of a specific finite element model disclosed in this application;

[0043] Figure 6 A schematic diagram of a specific optimized structure disclosed in this application;

[0044] Figure 7 A schematic diagram of a specific repaired structure disclosed in this application;

[0045] Figure 8 A schematic diagram of a specific structure after strength verification disclosed in this application;

[0046] Fig. 9 A schematic diagram of a wind turbine structure optimization device disclosed in this application;

[0047] Fig.10 This is a structural diagram of an electronic device disclosed in this application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1 As shown, an embodiment of the present invention discloses a method for optimizing the structure of a wind turbine generator set, comprising:

[0050] Step S11: establishing a basic three-dimensional model of the integrated structure of the bearing seat and the main frame based on the bearing seat area and the main frame area of ​​the wind turbine generator set and related connection interfaces.

[0051] In the embodiment of the present application, it is first necessary to construct a basic three-dimensional model of the wind turbine, which mainly includes an integrated structure of the bearing seat area and the main frame area, wherein a middle hole is reserved for assembling the main bearing and the main shaft, and a connection interface with the yaw system, the rear frame, the gear box, and the main bearing. The present application integrates the main frame and the bearing seat together, eliminating the connecting bolts and flanges, and such an integrated structure can improve material utilization.

[0052] In a specific embodiment, the basic three-dimensional model of the integrated structure of the bearing seat and the main frame is established based on the bearing seat area, the main frame area and the related connection interfaces of the wind turbine generator set, which may include: establishing a cylindrical structure with the main shaft axis as the rotation axis based on the bearing seat area of ​​the wind turbine generator set, and establishing a cylindrical structure with the tower axis as the rotation axis based on the main frame area of ​​the wind turbine generator set, so as to combine the bearing seat area, the main frame area and the related connection interfaces to obtain a basic three-dimensional model of the integrated structure; the front end surface of the cylindrical structure corresponding to the bearing seat area is located between the front bearing and the hub. Specifically, according to the characteristics of the bearing seat, first, a cylinder with the main shaft axis as the rotation axis can be established, and the front and rear end faces are adjacent to the front and rear bearings respectively. The outer diameter of the cylinder is larger than the outer diameter of the bearing, which can generally be 500 ~ 1000 mm (millimeters); then the space occupied by the main shaft and the front and rear bearings is cut off inside the cylinder; correspondingly, according to the characteristics of the main frame, a cylindrical structure with the tower axis as the rotation axis can be established, the inner and outer diameters of the cylinder are determined by the yaw system connection interface, the bottom of the cylinder is flush with the yaw system connection interface, and the top of the cylinder intersects with the bearing seat; then, according to the yaw system and the rear frame connection interface structure, the corresponding shapes are cut out at the corresponding positions; the final basic three-dimensional model is the result of the combination of the main frame area and the bearing seat area.

[0053] Step S12: establishing a finite element model of the overall structure of the wind turbine generator set according to the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and other spatial entity structures of the wind turbine generator set.

[0054] Furthermore, in order to verify the above-mentioned basic three-dimensional model, a finite element model including the basic three-dimensional model and other structures of the wind turbine can be established to obtain a finite element model of the overall structure of the wind turbine, which can specifically include a finite element model of the bearing seat area, main frame area, and main shaft, main bearing, rear frame, yaw system, tower, wind wheel, gear box and other structures corresponding to the basic three-dimensional model. In a specific embodiment, the finite element model of the overall structure of the wind turbine is established according to the basic three-dimensional model, which can include: establishing a finite element model corresponding to the overall structure according to the material parameters and contact relationship of the basic three-dimensional model and the overall structure of the wind turbine. Specifically, the wind wheel and gear box use mass point equivalence to simplify calculations, and are connected to the main shaft through a rigid beam unit; the connection interfaces of the main bearing, rear frame, and yaw system should be guaranteed to correspond to the basic three-dimensional model, and be connected together through binding contact.

[0055] Step S13: applying unit forces and moments in different directions to the finite element model according to preset working conditions, so as to respectively calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition.

[0056] In the embodiment of the present application, firstly, unit forces and moments can be applied to the finite element model obtained by the above steps in combination with the preset working conditions, so that the weighted flexibility and mass of the integrated structure of the wind turbine under each type of working condition can be calculated. In a specific embodiment, the unit forces and moments in different directions are applied to the finite element model according to the preset working conditions, which can include: determining other areas in the finite element model except the interface part of the spatial entity of the wind turbine as the area to be optimized; applying unit forces and moments in different directions to the hub center in the area to be optimized of the finite element model according to the preset working conditions. Specifically, for the finite element model established for the overall structure of the wind turbine, the interface part can be set as a non-design space to keep the structure unchanged, and other areas can be regarded as design spaces to obtain the area to be optimized; subsequently, these areas are structurally optimized, and specifically, unit forces and moments in different directions can be applied to the hub center in the area to be optimized of the finite element model in combination with the preset working conditions.

[0057] Step S14: optimizing the weighted flexibility of the finite element model corresponding to the basic three-dimensional model based on a preset material quality upper limit to obtain a target three-dimensional model that meets preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and main frame of the wind turbine according to the target three-dimensional model.

[0058] In an embodiment of the present application, after calculating the weighted flexibility and mass of the basic three-dimensional model under each working condition through the above steps, the weighted flexibility of the basic three-dimensional model can be optimized; specifically, the upper limit of the allowable material mass is set as an optimization constraint, and the weighted flexibility is optimized under this condition; then, the three-dimensional model after each optimization can be verified according to the pre-set strength verification conditions to finally obtain a target three-dimensional model that meets the strength verification conditions; subsequently, the integrated structure of the bearing seat and main frame of the wind turbine set can be optimized according to the target three-dimensional model.

[0059] In a specific embodiment, the weighted flexibility of the finite element model corresponding to the basic three-dimensional model is optimized based on the preset material quality upper limit to obtain a target three-dimensional model that meets the preset strength verification conditions, which may include: adjusting the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model based on the preset material quality upper limit to obtain the adjusted bearing seat and main frame integrated structure corresponding to the minimum weighted flexibility, and determining the optimized three-dimensional model corresponding to the adjusted bearing seat and main frame integrated structure; verifying the optimized three-dimensional model according to the preset strength verification conditions to obtain the target three-dimensional model that meets the preset strength verification conditions. Specifically, the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model can be adjusted according to the preset material quality upper limit, and the optimized three-dimensional model with the minimum weighted flexibility and the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model can be optimized under the material quality condition; subsequently, the optimized three-dimensional model is strength-verified using the preset strength verification conditions, and finally the target three-dimensional model that meets the conditions can be optimized.

[0060] In another specific embodiment, the adjustment of the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model based on the preset material quality upper limit may include: adding material or adding functional structure to the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model based on the preset material quality upper limit. Specifically, in the process of optimizing weighted flexibility, material or functional structure such as a wind rotor lock or a yaw drive hole may be appropriately added to the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model according to quality requirements and process requirements.

[0061] In another specific embodiment, the step of verifying the optimized three-dimensional model according to a preset strength verification condition to obtain a target three-dimensional model that meets the preset strength verification condition may include: respectively performing an ultimate strength verification and a fatigue strength verification on the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model to obtain corresponding first verification results and second verification results; if the first verification result indicates that the actual stress of the ultimate strength verification is less than a first preset threshold value, and the second verification result indicates that the fatigue damage of the fatigue strength verification is lower than a second preset threshold value, then the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model is determined to be the bearing seat and the main frame integrated structure corresponding to the target three-dimensional model that meets the preset strength verification condition; if the first verification result indicates that the actual stress of the ultimate strength verification is not less than the first preset threshold value, and / or the second verification result indicates that the fatigue damage of the fatigue strength verification is not lower than the second preset threshold value, then the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model are continuously adjusted based on the preset material quality upper limit, and the step of jumping to respectively performing an ultimate strength verification and a fatigue strength verification on the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model to obtain corresponding first verification results and second verification results. Specifically, when the optimized three-dimensional model is strength-checked, an ultimate strength check and a fatigue strength check are performed respectively to obtain a first check result and a second check result; and, if the first check result corresponding to the optimized three-dimensional model indicates that the actual stress is less than a first preset threshold, and the fatigue damage indicated by the second check result is lower than a second preset threshold, then it can be determined that the integrated structure of the bearing seat and the main frame corresponding to the obtained optimized three-dimensional model meets the strength requirement; correspondingly, if the actual stress indicated by the first check result corresponding to the optimized three-dimensional model is not less than the first preset threshold, and the fatigue damage indicated by the second check result is not lower than the second preset threshold, and either of the two does not meet the strength check condition or does not meet the condition, it is necessary to continue to optimize the integrated structure of the bearing seat and the main frame corresponding to the current optimized three-dimensional model until the optimized three-dimensional model corresponding to the integrated structure of the bearing seat and the main frame obtained by the final optimization meets the preset strength check condition.

[0062] It can be seen that the present application is to establish a basic three-dimensional model of the integrated structure of the bearing seat and the main frame. The integrated structure effectively eliminates the reinforcement materials near the bolts and the bolt connection area, effectively improves the connection reliability, reduces stress concentration, and saves material and maintenance costs compared to the traditional split structure; and by constraining the overall quality of the structure, the flexibility of the structure is used as the optimization target to optimize the integrated structure, which can simultaneously obtain an integrated structure with higher material utilization and that meets the strength and functional requirements, thereby reducing the difficulty of structural design optimization of the wind turbine.

[0063] like Figure 2 As shown, the embodiment of the present application discloses a method for optimizing the structure of a wind turbine generator set, comprising:

[0064] In the embodiment of the present application, it is first necessary to establish a basic three-dimensional model corresponding to the wind turbine group; Figure 3 As shown, it includes a bearing seat area 21 and a main frame area 22. In addition, the modeling method of the bearing seat area 21 is as follows: first, a cylindrical structure with the main shaft axis as the rotation axis is established. In this example, the unit is an integrated structure of a bearing seat and a gear box. The rear end face of the bearing seat is connected to the gear ring of the gear box. Therefore, the rear end face of the cylinder corresponds to the front edge of the gear box, and the front end face of the cylinder is located between the front bearing and the wheel hub, with a spacing of 100 mm from the front bearing; the outer diameter of the cylinder is larger than the outer diameter of the bearing, and a spacing of 500 mm is taken; then the space occupied by the main shaft and the front and rear bearings is cut off inside the cylinder; the above spacing is selected based on experience. If a structure that meets the strength requirements cannot be obtained, it can be appropriately increased; accordingly, the modeling method of the main frame area 22 is as follows: first, a cylindrical structure with the tower axis as the rotation axis is established. The inner and outer diameters of the cylinder are determined by the yaw system connection interface. The bottom of the cylinder is flush with the yaw system connection interface, and the top of the cylinder intersects with the bearing seat; then according to the rear frame connection interface structure, two connection planes are cut at the corresponding position; then the bearing seat area 21 is combined with the main frame area 22 to obtain a complete basic three-dimensional model. In this model, a total of Figure 4 Interfaces shown: front main bearing interface 31, rear main bearing interface 32, gearbox ring gear interface 33, rear frame interface 34, yaw bearing interface 35.

[0065] Furthermore, based on the basic three-dimensional model of the wind turbine, an overall finite element model can be established, such as Figure 5 As shown, it includes a wind rotor dummy 41, a main shaft 42, a gear box dummy 43, a generator dummy 44, a rear frame 45, a yaw system 46, and a tower 47. The mesh is divided, material parameters and contact relationships are set, and a finite element model of the entire wind turbine is established.

[0066] Then, the integrated structure of the wind turbine is topologically optimized and repaired based on the finite element model. Specifically, the interface between the bearing seat and the main frame can be used as the non-design space, and the other areas can be used as the design space. Unit forces and moments in different directions are applied to the hub center, and the weighted flexibility and mass of the integrated structure under each working condition are calculated. The upper limit of the allowable material mass is set as the optimization constraint, and the optimization design is performed with the goal of minimizing the weighted flexibility of the system to obtain the optimized integrated structure, such as Figure 6As shown. It can be seen that the directly reconstructed 3D model has irregular surfaces and some structures that obviously violate the design principles, such as the main bearing related area (i.e. the bearing seat part in the conventional design) is not completely closed, which conflicts with the bearing lubrication design. Therefore, shape repair is performed according to the component design requirements. The basic principle of repair is to appropriately increase the material according to the design principles and process requirements on the premise of the envelope optimization result to obtain a smooth surface structure, and additionally add other necessary designs such as the wind wheel lock 61, the yaw drive hole 62, etc. The structure after repair based on the above principles is as follows Figure 7 shown.

[0067] Then the optimized integrated structure is subjected to strength check and shape optimization. Specifically, the optimized integrated structure is subjected to ultimate strength check and fatigue strength check respectively. The optimized stress should be higher than the allowable stress or the area where the damage exceeds 1, until the optimized integrated structure meets the strength requirements, such as Figure 8 The figure shows the integrated structure of the bearing seat and the main frame after optimization, repair and strength verification in this embodiment.

[0068] It can be seen that this application is to establish a basic three-dimensional model of the integrated structure of the bearing seat and the main frame. The integrated structure effectively eliminates the reinforcement materials near the bolts and bolt connection areas, effectively improves the connection reliability, reduces stress concentration, and saves materials and maintenance costs compared to the traditional split structure; and the integrated structural design of the wind turbine is more convenient and universal. Through a set of process-based design methods, the main bearing and main frame structure that meet the strength and functional requirements can be obtained at the same time. Compared with the three components of the main bearing, main frame, and flange in the traditional split structure, the design process and difficulty are greatly simplified. Subsequently, by constraining the overall quality of the structure and taking the structural flexibility as the optimization target, an integrated structure with higher material utilization can be obtained.

[0069] like Fig. 9 As shown, the embodiment of the present application discloses a wind turbine structure optimization device, comprising:

[0070] A three-dimensional model building module 71 is used to build a basic three-dimensional model of the integrated structure of the bearing seat and the main frame based on the bearing seat area and the main frame area of ​​the wind turbine generator and the related connection interfaces;

[0071] A finite element model building module 72 is used to build a finite element model of the overall structure of the wind turbine generator set according to the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and other spatial entities of the wind turbine generator set;

[0072] A working condition calculation module 73, used for applying unit forces and moments in different directions to the finite element model according to preset working conditions, so as to respectively calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition;

[0073] The structural optimization module 74 is used to optimize the weighted flexibility of the finite element model corresponding to the basic three-dimensional model based on a preset material quality upper limit to obtain a target three-dimensional model that meets preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and main frame of the wind turbine according to the target three-dimensional model.

[0074] It can be seen that the present application is to establish a basic three-dimensional model of the integrated structure of the bearing seat and the main frame, which improves the connection reliability, simplifies the process, and can improve the efficiency of structural design; and by constraining the overall quality of the structure, the flexibility of the structure is used as the optimization target to optimize and adjust the integrated structure, so as to obtain an integrated structure with higher material utilization.

[0075] In a specific embodiment, the three-dimensional model building module 71 may include:

[0076] A three-dimensional model building unit is used to build a cylindrical structure with the main shaft axis as the rotation axis based on the bearing seat area of ​​the wind turbine generator set, and to build a cylindrical structure with the tower axis as the rotation axis based on the main frame area of ​​the wind turbine generator set, so as to combine the bearing seat area, the main frame area and related connection interfaces to obtain a basic three-dimensional model of an integrated structure; the front end face of the cylindrical structure corresponding to the bearing seat area is located between the front bearing and the hub.

[0077] In a specific embodiment, the finite element model building module 72 may include:

[0078] The finite element model building unit is used to build a finite element model corresponding to the overall structure according to the basic three-dimensional model and the material parameters and contact relationship of the overall structure of the wind turbine generator set.

[0079] In a specific embodiment, the operating condition calculation module 73 may include:

[0080] A region determination unit, used for determining other regions in the finite element model except the interface portion of the spatial entity of the wind turbine generator set as regions to be optimized;

[0081] A force applying unit is used to apply unit forces and moments in different directions to the hub center in the area to be optimized of the finite element model according to preset working conditions.

[0082] In a specific embodiment, the structure optimization module 74 may include:

[0083] A structural optimization submodule, for adjusting the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model based on a preset material mass upper limit, so as to obtain an adjusted bearing seat and main frame integrated structure corresponding to the minimum weighted flexibility, and determining an optimized three-dimensional model corresponding to the adjusted bearing seat and main frame integrated structure;

[0084] The strength verification submodule is used to verify the optimized three-dimensional model according to preset strength verification conditions to obtain a target three-dimensional model that meets the preset strength verification conditions.

[0085] In another specific embodiment, the structure optimization submodule may include:

[0086] The structure adding unit is used to add material or functional structure to the integrated structure of the bearing seat and main frame corresponding to the basic three-dimensional model based on a preset material quality upper limit.

[0087] In yet another specific embodiment, the strength check submodule may include:

[0088] A strength verification unit, used to respectively perform an ultimate strength verification and a fatigue strength verification on the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model, and obtain corresponding first verification results and second verification results;

[0089] a determination unit, configured to determine the integrated structure of the bearing seat and the main frame corresponding to the optimized three-dimensional model as the integrated structure of the bearing seat and the main frame corresponding to the target three-dimensional model that meets the preset strength verification condition when the first verification result indicates that the actual stress of the ultimate strength verification is less than a first preset threshold value, and the second verification result indicates that the fatigue damage of the fatigue strength verification is lower than a second preset threshold value;

[0090] A jump unit is used to continue to adjust the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model based on the preset material quality upper limit when the first verification result represents that the actual stress of the ultimate strength verification is not less than the first preset threshold value, and / or the second verification result represents that the fatigue damage of the fatigue strength verification is not less than the second preset threshold value, and jump to the step of performing ultimate strength verification and fatigue strength verification on the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model respectively to obtain the corresponding first verification result and second verification result.

[0091] Furthermore, the present application also discloses an electronic device. Fig.10 This is a structural diagram of an electronic device 80 according to an exemplary embodiment. The content in the diagram cannot be regarded as any limitation on the scope of use of the present application.

[0092] Fig.10A schematic diagram of the structure of an electronic device 80 provided in an embodiment of the present application. The electronic device 80 may specifically include: at least one processor 81, at least one memory 82, a power supply 83, a communication interface 84, an input / output interface 85, and a communication bus 86. The memory 82 is used to store a computer program, which is loaded and executed by the processor 81 to implement the relevant steps in the wind turbine structure optimization method disclosed in any of the aforementioned embodiments. In addition, the electronic device 80 in this embodiment may specifically be an electronic computer.

[0093] In this embodiment, the power supply 83 is used to provide working voltage for each hardware device on the electronic device 80; the communication interface 84 can create a data transmission channel between the electronic device 80 and external devices, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 85 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0094] In addition, the memory 82, as a carrier for storing resources, can be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon can include an operating system 821, a computer program 822, etc., and the storage method can be temporary storage or permanent storage.

[0095] The operating system 821 is used to manage and control the hardware devices on the electronic device 80 and the computer program 822, which can be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program that can be used to complete the wind turbine structure optimization method performed by the electronic device 80 disclosed in any of the aforementioned embodiments, the computer program 822 can further include computer programs that can be used to complete other specific tasks.

[0096] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the wind turbine structure optimization method disclosed above is implemented. The specific steps of the method can refer to the corresponding contents disclosed in the above embodiments, and will not be repeated here.

[0097] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0098] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0099] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0100] Finally, 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 presence of other identical elements in the process, method, article or device including the elements.

[0101] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for optimizing the structure of a wind turbine generator system, characterized in that: include: A basic three-dimensional model of the integrated structure of the bearing seat and the main frame is established based on the bearing seat area and the main frame area of ​​the wind turbine and the related connection interfaces; A finite element model of the overall structure of the wind turbine generator set is established based on the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and other spatial entity structures of the wind turbine generator set; Applying unit forces and moments in different directions to the finite element model according to preset working conditions to respectively calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition; The weighted flexibility of the finite element model corresponding to the basic three-dimensional model is optimized based on the preset material mass upper limit to obtain a target three-dimensional model that meets the preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and main frame of the wind turbine according to the target three-dimensional model.

2. The wind turbine structure optimization method according to claim 1, characterized in that: The basic three-dimensional model of the integrated structure of the bearing seat and the main frame is established based on the bearing seat area and the main frame area of ​​the wind turbine generator set and the related connection interfaces, including: A cylindrical structure with the main shaft axis as the rotation axis is established based on the bearing seat area of ​​the wind turbine generator set, and a cylindrical structure with the tower axis as the rotation axis is established based on the main frame area of ​​the wind turbine generator set, so as to combine the bearing seat area, the main frame area and related connection interfaces to obtain a basic three-dimensional model of an integrated structure; the front end surface of the cylindrical structure corresponding to the bearing seat area is located between the front bearing and the hub.

3. The wind turbine structure optimization method according to claim 1, characterized in that: The step of establishing a finite element model of the overall structure of the wind turbine generator set according to the basic three-dimensional model comprises: A finite element model corresponding to the overall structure is established according to the material parameters and contact relationship of the basic three-dimensional model and the overall structure of the wind turbine generator set.

4. The wind turbine structure optimization method according to claim 2, characterized in that: The applying unit forces and moments in different directions to the finite element model according to the preset working conditions comprises: Determine other regions in the finite element model except the interface portion of the spatial entity of the wind turbine generator set as regions to be optimized; Unit forces and moments in different directions are applied to the hub center in the to-be-optimized area of ​​the finite element model according to preset working conditions.

5. The wind turbine structure optimization method according to any one of claims 1 to 4, characterized in that: The optimizing the weighted compliance of the finite element model corresponding to the basic three-dimensional model based on the preset material mass upper limit to obtain a target three-dimensional model that meets the preset strength verification conditions includes: The bearing seat and main frame integrated structure corresponding to the basic three-dimensional model is adjusted based on a preset material mass upper limit to obtain an adjusted bearing seat and main frame integrated structure corresponding to a minimum weighted flexibility, and an optimized three-dimensional model corresponding to the adjusted bearing seat and main frame integrated structure is determined; The optimized three-dimensional model is verified according to a preset strength verification condition to obtain a target three-dimensional model that meets the preset strength verification condition.

6. The wind turbine structure optimization method according to claim 5, characterized in that: The adjusting the bearing seat and main frame integrated structure corresponding to the basic three-dimensional model based on the preset material quality upper limit includes: Based on the preset material quality upper limit, materials or functional structures are added to the integrated structure of the bearing seat and the main frame corresponding to the basic three-dimensional model.

7. The wind turbine structure optimization method according to claim 5, characterized in that: The step of verifying the optimized three-dimensional model according to a preset strength verification condition to obtain a target three-dimensional model that meets the preset strength verification condition includes: Respectively performing ultimate strength verification and fatigue strength verification on the bearing seat and the main frame integrated structure corresponding to the optimized three-dimensional model to obtain corresponding first verification results and second verification results; If the first verification result indicates that the actual stress of the ultimate strength verification is less than a first preset threshold, and the second verification result indicates that the fatigue damage of the fatigue strength verification is lower than a second preset threshold, the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model is determined to be the bearing seat and main frame integrated structure corresponding to the target three-dimensional model that meets the preset strength verification conditions; If the first verification result indicates that the actual stress of the ultimate strength verification is not less than the first preset threshold, and / or the second verification result indicates that the fatigue damage of the fatigue strength verification is not less than the second preset threshold, then based on the preset material quality upper limit, the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model continue to be adjusted, and jump to the step of performing ultimate strength verification and fatigue strength verification on the bearing seat and main frame integrated structure corresponding to the optimized three-dimensional model respectively to obtain the corresponding first verification result and second verification result.

8. A wind turbine structure optimization device, characterized in that: include: A three-dimensional model building module is used to build a basic three-dimensional model of the integrated structure of the bearing seat and the main frame based on the bearing seat area and the main frame area of ​​the wind turbine and the related connection interfaces; A finite element model building module, used to build a finite element model of the overall structure of the wind turbine generator set according to the basic three-dimensional model; the overall structure includes the bearing seat area, the main frame area and other spatial entities of the wind turbine generator set; A working condition calculation module, used for applying unit forces and moments in different directions to the finite element model according to preset working conditions, so as to respectively calculate the weighted flexibility and mass of the basic three-dimensional model under each working condition; A structural optimization module is used to optimize the weighted flexibility of the finite element model corresponding to the basic three-dimensional model based on a preset material quality upper limit to obtain a target three-dimensional model that meets preset strength verification conditions, so as to optimize the integrated structure of the bearing seat and main frame of the wind turbine according to the target three-dimensional model.

9. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor is used to execute the computer program to implement the wind turbine structure optimization method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: Used to store a computer program, which, when executed by a processor, implements the wind turbine structure optimization method according to any one of claims 1 to 7.

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