Planet carrier automatic simulation method and device and readable storage medium

Abstract

The invention provides a planet carrier automatic simulation method and device and a readable storage medium, after an electronic device obtains an assembly body model, a gear parameter file, geometric parameters and simulation parameters of a planet carrier, a simplified geometric model attached with a naming selection set is generated according to the assembly body model and the geometric parameters; and generating a grid parameter file according to the naming selection set. And the electronic equipment also determines load parameters of the planet carrier under different working conditions according to the gear parameter file and the torques of the planet carrier under different working conditions. And finally, the electronic equipment performs rigidity and static strength simulation on the planet carrier according to the simplified geometric model, the grid parameter file, the simulation parameters and the load parameters of the planet carrier under different working conditions. By adopting the scheme, the electronic equipment automatically simulates the static strength and rigidity of the planet carrier according to the assembly body model of the planet carrier, the gear parameter file and the like, manual participation is not needed, the automation degree is high, the cost is low, and the period is short.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to an automated simulation method, equipment and readable storage medium for planetary carriers. Background Technology

[0002] With the continuous development of society and the increasing demand for energy, wind energy, as a clean and renewable energy source, is receiving increasing attention from countries around the world. Wind turbine generators, also known as wind turbines, are the main equipment for generating electricity using wind energy.

[0003] The wind turbine gearbox is a critical transmission component connecting the wind turbine rotor and the generator in a wind turbine generator set. It includes the planetary carrier, sun gear, and planetary gears. Among these, the planetary carrier is a key load-bearing component. Static strength and stiffness are two important indicators of the planetary carrier: static strength measures its ability to resist failure under load, while stiffness measures its ability to resist elastic deformation. Traditional experimental methods obtain static strength and stiffness using planetary carrier prototypes. This method involves applying static loads simulating operating conditions to the prototype, measuring the stress distribution at key locations using strain gauges, and measuring deformation using displacement sensors, thereby obtaining the static strength and stiffness of the planetary carrier.

[0004] However, traditional experimental methods have drawbacks such as high cost and long cycle. Summary of the Invention

[0005] This application provides an automated simulation method, device, and readable storage medium for planetary carriers. It automatically simulates the static strength and stiffness of the planetary carrier based on the assembly model and gear parameter files, etc., with a high degree of automation and short cycle time.

[0006] Firstly, this application provides an automated simulation method for planetary carriers, comprising: Obtain the assembly model, gear parameter file, geometric parameters, and simulation parameters of the planetary carrier. The gear parameter file is the basis for determining the force source and magnitude of the planetary carrier. The geometric parameters are used to describe the size and characteristics of the planetary carrier. The simulation parameters include at least the torque of the planetary carrier under different working conditions. A simplified geometric model with attached naming selection sets is automatically generated based on the assembly model and the geometric parameters. Geometric objects within the naming selection sets have the same attributes and correspond to the same name, while different naming selection sets have different names. A mesh parameter file is automatically generated based on the naming selection set. The mesh parameter file contains the name of each naming selection set and the parameters required to perform mesh generation on the simplified geometric model. Based on the gear parameter file and the torque of the planetary carrier under different operating conditions, determine the load parameters of the planetary carrier under different operating conditions; Based on the simplified geometric model, the mesh parameter file, and the load parameters of the planetary carrier under different working conditions, the static strength and stiffness of the planetary carrier are automatically simulated.

[0007] Secondly, this application provides an automated simulation device for planetary carriers, comprising: The acquisition module is used to acquire the assembly model of the planetary carrier, gear parameter files, geometric parameters, and simulation parameters. The gear parameter files are the basis for determining the force source and magnitude of the planetary carrier. The geometric parameters are used to describe the size and characteristics of the planetary carrier. The simulation parameters include at least the torque of the planetary carrier under different working conditions. The processing module is used to generate a simplified geometric model with attached naming selection sets based on the assembly model and the geometric parameters. The geometric objects in the naming selection sets have the same attributes and correspond to the same name, and different naming selection sets have different names. The generation module is used to generate a mesh parameter file based on the named selection set. The mesh parameter file contains the name of each named selection set and the parameters required to perform mesh generation on the simplified geometric model. The determination module is used to determine the load parameters of the planetary carrier under different working conditions based on the gear parameter file and the torque of the planetary carrier under different working conditions; The simulation module is used to automatically simulate the static strength and stiffness of the planetary carrier based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions.

[0008] Thirdly, embodiments of this application provide an electronic device, including: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it causes the electronic device to implement the method described in the first aspect or various possible implementations of the first aspect.

[0009] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer instructions, which, when executed by a processor, are used to implement the method described in the first aspect or various possible implementations of the first aspect.

[0010] Fifthly, embodiments of this application provide a computer program product comprising a computing program, wherein when the computer program is executed by a processor, it implements the method described in the first aspect or various possible implementations of the first aspect.

[0011] The automated simulation method, equipment, and readable storage medium for planetary carriers provided in this application involve an electronic device that, after acquiring the assembly model, gear parameter file, geometric parameters, and simulation parameters of the planetary carrier, generates a simplified geometric model with attached named selection sets based on the assembly model and geometric parameters. It then generates a mesh parameter file based on the named selection sets, containing the names of each named selection set and the parameters required for meshing the simplified geometric model. The electronic device also determines the load parameters of the planetary carrier under different operating conditions based on the gear parameter file and the torque of the planetary carrier under different operating conditions. Finally, the electronic device simulates the stiffness and static strength of the planetary carrier based on the simplified geometric model, mesh parameter file, simulation parameters, and load parameters of the planetary carrier under different operating conditions. Using this approach, the electronic device automatically simulates the static strength and stiffness of the planetary carrier based on the assembly model and gear parameter file, without manual intervention or the use of planetary carrier prototypes, resulting in high automation, low cost, and short cycle time. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the network architecture of the planetary carrier automated simulation method provided in this application; Figure 2 This is a flowchart of the automated simulation method for planetary carriers provided in this application; Figure 3 This is another flowchart of the planetary carrier automated simulation method provided in this application; Figure 4 A schematic diagram of the planetary carrier automated simulation device provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0014] The wind turbine gearbox is a critical transmission component connecting the wind turbine rotor and the generator in a wind turbine generator set. Its main function is to convert the low-speed, high-torque power from the wind turbine rotor into high-speed, low-torque power to match the generator. The planetary carrier is a critical load-bearing component of the wind turbine gearbox. Failure of the planetary carrier will lead to gearbox shutdown or malfunction. Two important indicators for evaluating the planetary carrier are static strength and stiffness. Static strength measures the planetary carrier's ability to resist failure under load, while stiffness measures its ability to resist elastic deformation. Common methods for obtaining the static strength and stiffness of the planetary carrier include traditional experimental methods and traditional simulation methods. The traditional experimental method involves applying a static load simulating the working conditions to a planetary carrier sample, measuring the stress distribution at key parts of the planetary carrier using strain gauges, and measuring the deformation using displacement sensors, thereby obtaining the static strength and stiffness of the planetary carrier. Traditional simulation methods involve manually importing and processing the planetary carrier's geometric model, manually calculating the carrier loads, and establishing a finite element model, including manually assigning material properties, establishing contact, and applying loads. Finally, the results data are manually extracted to obtain the static strength and stiffness of the planetary carrier. Clearly, traditional experimental methods are costly and time-consuming, while traditional simulation methods are time-consuming and labor-intensive.

[0015] Based on this, this application provides an automated simulation method, device, and readable storage medium for planetary carriers. By automatically simulating the static strength and stiffness of the planetary carrier based on the assembly model of the planetary carrier and gear parameter files, the method achieves a high degree of automation, short cycle time, and greatly reduces manual labor resources.

[0016] Figure 1 This is a schematic diagram of the network architecture of the planetary carrier automated simulation method provided in this application. Please refer to... Figure 1 The network architecture includes terminal device 11 and server 12, and a network connection is established between terminal device 11 and server 12.

[0017] Terminal device 11 can be, for example, a laptop, desktop computer, tablet computer, or mobile phone. The operating system of terminal device 11 can be any operating system, such as Windows, macOS, or Linux. An Integrated Development Environment (IDE) software, such as VS Code or PyCharm, is installed on terminal device 11. When simulating the stiffness and static strength of the planetary carrier, the user opens the IDE software, builds a virtual environment, and installs Python packages, etc. The Python packages can be, for example, the PyGeometry module package; this application does not limit this. After opening the IDE software, the assembly model of the planetary carrier can be assembled and sent to server 12. In addition, terminal device 11 also displays a Simulation Data Management (SDM) platform user interface, allowing users to input geometric parameters and simulation parameters, enabling interaction with server 12.

[0018] Server 12, such as a server in a high-performance computing (HPC) platform, is used to automatically simulate the static strength and stiffness of the planetary carrier based on the assembly model and gear parameter files. Server 12 has enormous computing and storage capabilities. Server 12 can be hardware or software. When server 12 is hardware, it can be a single server or a distributed server cluster composed of multiple servers. When server 12 is software, it can be multiple software modules or a single software module, etc., and this application is not limited thereto.

[0019] It should be understood that, Figure 1 The number of terminal devices 11 and servers 12 shown is merely illustrative. In actual implementation, any number of terminal devices 11 and servers 12 can be deployed according to actual needs.

[0020] Below, based on Figure 1 The implementation environment shown in this paper provides a detailed description of the automated simulation method for planetary carriers. For an example, please refer to... Figure 2 , Figure 2 This is a flowchart of the planetary carrier automated simulation method provided in this application. The executing entity of this application is an electronic device, such as the server mentioned above. This embodiment includes: 201. Obtain the assembly model, gear parameter file, geometric parameters, and simulation parameters of the planetary carrier. The gear parameter file is the basis for determining the force source and magnitude of the planetary carrier. The geometric parameters are used to describe the size and characteristics of the planetary carrier. The simulation parameters include at least the torque of the planetary carrier under different working conditions.

[0021] In this application, the planetary carrier assembly model is a three-dimensional model, referring to the assembly of the planetary carrier body, pins, and other independent parts according to actual assembly relationships and constraints. Wind turbine gearboxes contain multi-stage planetary gear trains, such as two-stage, three-stage, and one-stage planetary gear trains, with each stage corresponding to a planetary carrier. Hereinafter, any stage of the multi-stage planetary gear train is referred to as the k-th stage planetary gear train, where k ≥ 1 and is an integer. The gear parameter files for planetary carriers of different stages are different. These gear parameter files are the basis for determining the source and magnitude of forces on the planetary carrier, and include, but are not limited to, the number of teeth, module, pressure angle, helix angle, center distance, and number of planetary gears for the sun gear, planet gears, and ring gear.

[0022] When it is necessary to simulate the stiffness and static strength of the planetary carrier, for example, when simulating the stiffness and static strength of the planetary carrier of the k-th stage planetary gear train, the user sends the assembly model of the planetary carrier and the gear parameter file to the electronic device through the aforementioned terminal device, so that the electronic device can obtain the assembly model of the planetary carrier and the gear parameter file.

[0023] In addition, the terminal device displays a user interface for users to input geometric parameters, simulation parameters, etc. After the user completes the input, the terminal device submits the user-input geometric parameters and simulation parameters to the electronic equipment. Geometric parameters are used to describe the dimensions and characteristics of the planetary carrier, such as the thickness of the planetary carrier web and the parameters of the planetary gear shaft bores. Simulation parameters include at least the torque of the planetary carrier under different operating conditions, and may also include physical parameters such as the interference fit of the contact surface and the coefficient of friction.

[0024] 202. Based on the assembly model and the geometric parameters, a simplified geometric model with attached naming selection sets is automatically generated. Geometric objects within the naming selection sets have the same attributes and correspond to the same name, while different naming selection sets have different names.

[0025] After acquiring the assembly model and its geometric parameters, the electronic device simplifies the model by removing irrelevant faces, lines, and small features. These small features include, but are not limited to, non-load-bearing chamfers and process holes. The electronic device automatically creates Named Selections (NS) sets and attaches these NS sets to the simplified assembly model, resulting in a simplified geometric model with the attached Named Selections. A Named Selection set contains one, two, or more geometric objects with the same properties. For example, if a planetary carrier has three planetary gear pin mounting holes, and these three holes all function to bear the meshing force transmitted by the planetary gears, then the inner surfaces of these three mounting holes belong to the same Named Selection set. Similarly, if a planetary carrier has fillets of the same area in multiple phases, and these fillets are all stress concentration areas, then these fillets constitute a Named Selection set.

[0026] 203. Generate a mesh parameter file based on the named selection set. The mesh parameter file contains the name of each named selection set and the parameters required to perform mesh generation on the simplified geometric model.

[0027] After obtaining the naming selection set, the electronic device writes the names of each naming set into a blank file, and at the same time writes the parameters required for meshing the simplified geometric model into the blank file, thus obtaining the mesh parameter file.

[0028] 204. Based on the gear parameter file and the torque of the planetary carrier under different operating conditions, determine the load parameters of the planetary carrier under different operating conditions.

[0029] The terminal device inputs and submits the torque of the planetary carrier under different operating conditions through a user interface. Alternatively, the electronic equipment retrieves the torque of the planetary carrier under different operating conditions from the cloud based on the model of the planetary carrier. Different operating conditions include, but are not limited to, rated operating condition, ultimate positive torque operating condition, and ultimate negative torque operating condition. Then, the electronic equipment determines the load parameters of the planetary carrier under the corresponding operating condition based on the gear parameter file and the torque of the planetary carrier under different operating conditions.

[0030] 205. Based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions, automatically simulate the static strength and stiffness of the planetary carrier.

[0031] In this application, unless otherwise specified, the simplified geometric model refers to the simplified geometric model with the NS set attached. After obtaining the simplified geometric model, the electronic device automatically performs pre-simulation processing on the simplified geometric model, and then automatically performs post-processing on the finite element model obtained after pre-simulation processing to simulate the static strength and stiffness of the planetary carrier. The pre-simulation processing includes, but is not limited to, mesh generation, assigning material properties, setting contact pairs, and applying load parameters.

[0032] The automated simulation method for planetary carriers provided in this application involves an electronic device acquiring the assembly model of the planetary carrier, gear parameter files, geometric parameters, and simulation parameters. Based on the assembly model and geometric parameters, it generates a simplified geometric model with attached named selection sets. A mesh parameter file is then generated based on these named selection sets, containing the names of each set and the parameters required for meshing the simplified geometric model. The electronic device also determines the load parameters of the planetary carrier under different operating conditions based on the gear parameter files and the torque of the planetary carrier under these conditions. Finally, the electronic device simulates the stiffness and static strength of the planetary carrier based on the simplified geometric model, mesh parameter files, simulation parameters, and load parameters under different operating conditions. Using this method, the electronic device automatically simulates the static strength and stiffness of the planetary carrier based on its assembly model and gear parameter files, eliminating the need for manual intervention. This eliminates the need to manually import the planetary carrier assembly model or manually calculate the planetary carrier loads, resulting in high automation, low cost, and short cycle time.

[0033] Optionally, in the above embodiments, during the process of the electronic device automatically generating a simplified geometric model with attached naming selection sets based on the assembly model and the geometric parameters, the electronic device first renames and simplifies each part in the assembly model to obtain an intermediate model. Multiple face sets are then created based on the intermediate model, with faces belonging to the same face set having the same attributes. The intermediate model is a simplified geometric model without attached naming selection sets. Afterwards, the electronic device divides the faces contained in the intermediate model according to the multiple face sets and the geometric parameters to obtain the simplified geometric model with attached naming selection sets.

[0034] For example, after acquiring the assembly model, the electronic device traverses the model tree that makes up the assembly model and renames the parts. After renaming, the carrier is named PC, the sun gear is named SG, and the pin is named PIN. These names are used for subsequent pre-simulation processing. Simultaneously, the electronic device removes redundant faces and edges from the assembly model. These faces and edges include, but are not limited to, small faces or short edges caused by operational errors, broken faces or fragmented edges generated during the assembly model import process, etc. After renaming and simplifying the assembly model, an intermediate model is obtained. This intermediate model is a simplified geometric model that has not yet been attached with a naming selection set.

[0035] Next, the electronic device iterates through each face of the intermediate model using the PyGeometry Application Programming Interface (API), assigning different colors based on different geometric features and creating multiple face sets, such as cylindrical face sets, rounded face sets, and planar face sets. After creating multiple face sets, the electronic device uses PyGeometry's selection function to identify local geometric features based on the geometric parameters and face sets, and creates multiple NS sets according to simulation requirements, writing the names of each NS set into the mesh parameter file. PyGeometry is a Python API module related to Ansys geometry processing.

[0036] The mesh parameter file contains the names of each NS set and the parameters required for meshing the simplified geometry model, including but not limited to element size, affected distance, and face meshing indicator parameters. A face meshing indicator parameter of 1 indicates that face meshing is required, while a parameter of 0 indicates that face meshing is not required. The mesh parameter file, also known as a mesh file, is typically saved in comma-separated values ​​(CSV) format.

[0037] After generating a simplified geometric model and mesh file with attached naming selection sets, the electronic device exports the simplified geometric model and mesh file. This facilitates modification of parameters in the mesh file when the mesh quality is substandard, and outputs the simplified geometric model with attached naming selection sets after the simulation is completed. The simplified geometric model can be saved in formats such as scdoc, dsco, or pmdb, etc., and this application does not limit this.

[0038] It should be noted that although the above description uses the deployment of Ansys on an electronic device as an example, this application is not limited to this. In other feasible implementations, Ansys can also be deployed on a terminal device. After assembling the planetary carrier assembly model on the terminal device through an IDE, the assembly model can be simplified on the terminal device, and an NS set can be created to obtain a simplified geometric model and mesh parameter file with attached name selection sets. Then, the terminal device can send the simplified geometric model and mesh parameter file with attached name selection sets to the electronic device.

[0039] Using this approach, electronic devices can automatically generate simplified geometric models with attached naming selection sets by renaming parts and creating face sets, resulting in fast generation speed and high accuracy.

[0040] Optionally, in the above embodiments, the gear parameter file is the gear parameter file of the planetary carrier corresponding to the multi-stage planetary gear train included in the wind turbine gearbox. During the process of determining the load parameters of the planetary carrier under different operating conditions based on the gear parameter file and the torque of the planetary carrier under different operating conditions, the electronic device determines the tangential force of each planetary pin shaft, the bending moment of the planetary pin shaft, and the axial force transmitted from the (k-1)th stage planetary gear train to the k-th stage planetary gear train of the planetary carrier corresponding to the k-th stage planetary gear train, based on the gear parameter file and the torque of the planetary carrier under different operating conditions. This yields the load parameters of the planetary carrier corresponding to the k-th stage planetary gear train under different operating conditions. The k-th stage planetary gear train and the (k-1)th stage planetary gear train are two adjacent stages in the multi-stage planetary gear train, and the (k-1)th stage planetary gear train is the upper stage planetary gear train of the k-th stage planetary gear train.

[0041] For example, a wind turbine gearbox contains a multi-stage planetary gear train. A gear parameter file stores the gear parameters for each stage of the planetary gear train, but the gear parameters of the planet carriers differ between stages. When static strength and stiffness simulation of the planet carrier of the k-th stage planetary gear train is required, the terminal device sends the gear parameter file of the planet carrier to the electronic device, allowing the electronic device to obtain the gear parameter file. The user selects the k-th stage planet carrier to be calculated, and the load on the k-th stage planet carrier can be calculated automatically. The contents of this gear parameter file include, but are not limited to, the center distance of the k-th stage, the number of planet gears in the k-th stage, the pitch circle diameter of the k-th stage planet gears, and the pitch circle diameter of the k-th stage sun gear.

[0042] In this application, the load parameters include, but are not limited to, the tangential force of the planetary pin shaft, the bending moment of the planetary pin shaft, and the axial force transmitted from the (k-1)th stage planetary gear train to the kth stage planetary gear train. Among them, the tangential force of the planetary pin shaft, the bending moment of the planetary pin shaft, and the axial force of the pin shaft are determined by the following formulas (1), (2), and (3), respectively.

[0043] Formula (1) Formula (2) Formula (3) in, For planetary unit series, For the first Tangential force on the planetary pin shaft, For the first Planetary pin bending moment, For the first The axial force on the planetary pin is the axial force transmitted from the (k-1)th stage planetary gear train to the kth stage planetary gear train. Torque, torque under different operating conditions different. For the first Center distance of level For the first Number of planetary gears in the first stage For the first The pitch circle diameter of the planetary gears. For the first The pitch circle diameter of the first-stage sun gear. For the first Stage gear helix angle, For each star-shaped transmission ratio In addition, load parameters also include the radial force generated by gear meshing. It is understandable that when k=1, that is, for the first-stage planetary gear train, there is no axial force transmitted to the k-stage planetary gear train.

[0044] After obtaining the load parameters of the planetary carrier under different operating conditions, the electronic equipment defines a Quantity class to generate simulation load information based on the load parameters, such as Quantity(1000 [Nm]). This is because the built-in code in ANSYS Mechanical requires the Quantity class to identify the parameters.

[0045] Using this approach, the electronic equipment can determine the load parameters of the planetary carrier under different operating conditions through simple calculations based on the torque and gear parameter files of the planetary carrier under different operating conditions. This method is fast and accurate.

[0046] Optionally, in the above embodiments, during the process of simulating the static strength and stiffness of the planetary carrier based on the simplified geometric model, the mesh parameter file, and the load parameters of the planetary carrier under different operating conditions, the electronic device first generates a finite element model based on the simplified geometric model, the mesh parameter file, and the load parameters of the planetary carrier under different operating conditions. Then, the electronic device uses the finite element model to simulate the static strength and stiffness of the planetary carrier.

[0047] In this application, the finite element model is a model obtained by performing a series of settings on a simplified geometric model, including but not limited to meshing the simplified geometric model, assigning material properties to the parts, setting constraints, and applying loads. Moreover, the finite element model is a solvable finite element model, meaning that on the one hand, the finite element model meets the requirement of being numerically solvable and can yield results; on the other hand, the finite element model can reasonably map the actual working state of the planetary carrier, that is, the results obtained based on the finite element model are useful.

[0048] By adopting this approach, the electronic device generates a finite element model based on a simplified geometric model, the mesh parameter file, and the load parameters of the planetary carrier under different working conditions. The finite element model is then used to simulate the stiffness and static strength of the planetary carrier, ensuring smooth simulation and improving the simulation efficiency and reliability of static strength and stiffness.

[0049] The following sections will provide detailed explanations of how to generate a finite element model and how to use the finite element model to simulate the stiffness and static strength of the planetary carrier.

[0050] First, how to generate a finite element model.

[0051] Optionally, during the process of automatically generating a finite element model based on a simplified geometric model, a mesh parameter file, and load parameters of the planetary carrier under different operating conditions, the electronic device sets the simplified geometric model according to the physical parameters in the simulation parameters, performs mesh generation on the simplified geometric model according to the mesh parameter file, and applies the load parameters of the planetary carrier under different operating conditions to the simplified geometric model to generate the finite element model. The setting of the simplified geometric model includes at least assigning material properties to the parts in the simplified geometric model, setting contact pairs according to the naming selection set, and creating local coordinate systems and paths for each pin in the simplified geometric model.

[0052] For example, in the process of obtaining the finite element model based on the simplified geometric model, at least three settings are made for the simplified geometric model: Set a) Simplify the geometric model based on the physical parameters in the simulation parameters.

[0053] In this application, the simulation parameters include, but are not limited to, the torque and physical parameters under the different working conditions described above. Please refer to [further details]. Figure 1 When users input torque under different operating conditions through the user interface of the terminal device, they can also input some physical parameters, such as material information, contact surface interference, and friction coefficient. The electronic device traverses the simplified geometric model, assigns corresponding material properties to different parts according to the physical parameters, sets contact pairs using the established NS set, and creates local coordinate systems and paths for each pin in the simplified geometric model.

[0054] Set b to perform mesh generation on the simplified geometric model based on the mesh parameter file.

[0055] The electronic device reads the mesh parameter file (Mesh.csv) and meshes the simplified geometric model according to the parameters and NS names in the file. If the mesh does not meet the computational requirements, the mesh parameter file is modified and the mesh is re-generated.

[0056] For example, after the electronic device performs mesh generation on the simplified geometric model based on the mesh parameter file, it automatically determines whether the simplified geometric model after mesh generation meets the calculation requirements. If it does not meet the requirements, it automatically modifies the parameters in the mesh parameter file and re-performs mesh generation on the simplified geometric model.

[0057] For example, after the electronic device performs mesh generation on the simplified geometric model based on the mesh parameter file, it outputs the mesh model, i.e., the simplified geometric model with the mesh completed. The user then determines whether the mesh model meets the calculation conditions. If it does not meet the calculation conditions, the user opens the mesh parameter file on the terminal device, modifies the parameters therein, such as changing the mesh size and mesh spread distance, and uploads the modified mesh parameter file back to the electronic device, triggering the electronic device to re-perform mesh generation on the simplified geometric model.

[0058] Set c to apply the load parameters of the planetary carrier under different operating conditions to the simplified geometric model.

[0059] For example, setting 'c', also known as load setting, primarily aims to apply load parameters under different operating conditions to the simplified geometric model. Typically, these different operating conditions include rated operating condition, ultimate positive torque operating condition, and ultimate negative torque operating condition. In addition, the planetary carrier's operating conditions also include shutdown operating condition, low-voltage ride-through operating condition, and single-blade hoisting operating condition, with different load parameters for each condition.

[0060] In addition to the three settings mentioned above, the electronic equipment also defines the model boundary conditions and force sources based on the assumptions of the simplified geometric model, so that the force and motion state of the simplified geometric model closely matches the actual working conditions of the planetary carrier.

[0061] It is understandable that settings a, b, and c above all apply to the same simplified geometric model, and these three settings are performed in parallel without interference. Completing settings a, b, and c yields the finite element model. Settings a, b, and c are also known as preprocessing. After preprocessing, the electronic device saves the finite element model as an ANSYS Mechanical simulation file in formats such as mechdb, facilitating subsequent output. When the number of cores on the electronic device exceeds the minimum required for simulation, the static strength and stiffness of the planetary carrier can be simulated locally on the electronic device using the finite element model; when the number of cores on the electronic device is too small to support simulation processing, the finite element model can be submitted to a platform with a larger number of cores. Examples of core counts include 32, 64, 128, and 256 cores.

[0062] Using this approach, electronic devices generate finite element models by setting physical parameters, meshing, and applying load data to a simplified geometric model. This method is fast and produces highly reliable finite element models, thereby improving the speed and quality of stiffness and static strength simulations.

[0063] Secondly, how to use the finite element model to simulate the stiffness and static strength of the planetary carrier.

[0064] Optionally, during the simulation of the static strength and stiffness of the planetary carrier using the finite element model, for the rated operating condition, tangential deformation results are extracted from the finite element model based on the paths of each pin in the simplified geometric model to simulate the stiffness of the planetary carrier. For the ultimate positive torque condition and the ultimate negative torque condition, multiple stress hotspots are determined from the finite element model according to the naming selection set, and the static strength of the planetary carrier is simulated using the finite element model and the multiple stress hotspots.

[0065] Typically, the rated operating condition simulation focuses on stiffness, while the ultimate positive torque and ultimate negative torque operating conditions emphasize static strength simulation. This is because the planetary carrier operates stably for a long time under the rated operating condition, and the core requirement is "controllable deformation," while the ultimate positive torque and ultimate negative torque operating conditions are short-term extreme loads, and it is necessary to avoid structural failures such as fracture and plastic deformation of the planetary carrier.

[0066] For rated operating conditions, the electronic equipment extracts tangential deformation results from the finite element model based on the paths created for each pin in setting a, obtaining the tangential deformation results corresponding to the paths of each pin. For each path, the tangential deformation results include maximum and minimum values, and the difference between the maximum and minimum values ​​is the tangential deformation amount ΔU. After determining the tangential deformation amount ΔU for each path, the electronic equipment determines the mean value of these tangential deformation amounts ΔU. This mean value is used to characterize the stiffness of the planetary carrier and is used for subsequent planetary gear modification, etc. Thus, the simulation of the planetary carrier stiffness is completed.

[0067] For the ultimate positive torque and ultimate negative torque conditions, the electronic device selects multiple stress hotspots (HS) from the finite element model based on the names of NS in the mesh parameter file. For the ultimate positive torque condition, the maximum principal stress of each stress hotspot is extracted from the finite element model; similarly, for the ultimate negative torque condition, the maximum principal stress of each stress hotspot is extracted from the finite element model. In this way, the electronic device obtains the maximum principal stress of each stress hotspot under the two ultimate torque conditions. Then, based on the two maximum principal stresses of each stress hotspot, the electronic device can simulate the static strength of the planetary carrier under the ultimate positive torque and ultimate negative torque conditions.

[0068] It is understandable that, although the above simulation process only simulates the stiffness of the planetary carrier under rated operating conditions, and only simulates the static strength of the planetary carrier under extreme positive torque and extreme negative torque conditions, the embodiments of this application are not limited. In other feasible implementations, the static strength of the planetary carrier under rated operating conditions can also be simulated using the same simulation method as that used for simulating the static strength of the planetary carrier under positive torque and extreme negative torque conditions; similarly, the stiffness of the planetary carrier under positive torque and extreme negative torque conditions can also be simulated using the same simulation method as that used for simulating the stiffness of the planetary carrier under rated operating conditions.

[0069] Using this approach, the electronic equipment uses a finite element model to simulate the stiffness of the planetary carrier under rated operating conditions, and also uses a finite element model to simulate the static strength of the planetary carrier under extreme positive torque and extreme negative torque conditions. The simulation is fast and accurate.

[0070] Optionally, after simulating the static strength of the planetary carrier using a finite element model and multiple stress hotspots, the electronic device determines a safety factor for each stress hotspot among the multiple stress hotspots, obtains the safety factor for each stress hotspot, and verifies the static strength of the planetary carrier based on the safety factor of each stress hotspot among the multiple stress hotspots.

[0071] For example, for each stress hotspot, the electronic device determines the absolute values ​​of the two maximum principal stresses for that stress hotspot: the first absolute value of the maximum principal stress under the ultimate positive torque condition and the second absolute value of the maximum principal stress under the ultimate negative torque condition. Then, the electronic device determines the ratio of the yield strength (including the material safety factor) to the first absolute value to obtain the safety factor under the ultimate positive torque condition, and determines the ratio of the yield strength to the second absolute value to obtain the safety factor (SRF) under the ultimate negative torque condition. The yield strength refers to the critical stress value at which the material used in the planetary carrier transitions from the "elastic deformation stage" to the "plastic deformation stage" during stress. When the stress on the planetary carrier exceeds this value, irreversible permanent deformation will occur, potentially leading to decreased gear meshing accuracy, transmission failure, or even structural damage. The materials used in the planetary carrier include, but are not limited to, high-strength alloy structural steel.

[0072] After obtaining two safety factors for each stress hotspot, the electronic device verifies the static strength of the planetary carrier based on these safety factors. For example, if there are 10 stress hotspots, and the safety factor for each stress hotspot under the ultimate positive torque condition is greater than the first preset value, and the safety factor for each stress hotspot under the ultimate negative torque condition is greater than the second preset value, then the static strength of the planetary carrier meets the standard. If the safety factor for at least one stress hotspot under the ultimate positive torque condition is less than or equal to the first preset value, or the safety factor under the ultimate negative torque condition is less than or equal to the second preset value, then the static strength of the planetary carrier does not meet the standard. The first preset value may be, for example, 1, 1.1, etc., and the second preset value may be, for example, 1.2, etc. The first and second preset values ​​can be the same or different; this application does not limit this.

[0073] Using this approach, the static strength of the planetary carrier is checked based on the safety factor of each stress hotspot, resulting in fast and accurate verification.

[0074] Optionally, in the above embodiments, after the electronic device simulates the static strength and stiffness of the planetary carrier based on the simplified geometric model, mesh parameter file, and load parameters of the planetary carrier under different operating conditions, it also generates a first file and a second file, and outputs the first file, the second file, and simulation result diagrams. The first file indicates the stiffness simulation result of the planetary carrier, the second file indicates the static strength simulation result of the planetary carrier, and the simulation result diagram includes at least one of a geometric model diagram, a mesh model diagram, a tangential deformation cloud map, a global stress cloud map, and a local stress cloud map. The mesh model diagram displays the mesh model obtained by meshing the simplified geometric model; the tangential deformation cloud map displays the tangential deformation result of each pin in the simplified geometric model; the global stress cloud map displays the stress distribution of the planetary carrier; and the local stress cloud map displays the stress at stress hotspots of the planetary carrier.

[0075] For example, the electronic device generates a first file based on the stiffness simulation results of the planetary carrier and a second file based on the static strength simulation results of the planetary carrier. Both the first and second files are, for example, CSV files.

[0076] In addition, the electronic device generates multiple simulation result diagrams, which can be in formats such as Portable Network Graphics (PNG) and Joint Photographic Experts Group (JPEG), and are not limited to these formats in this application embodiment. The simulation result diagrams include diagrams of simplified geometric models and mesh models generated during the simulation process, or tangential deformation cloud diagrams, global stress cloud diagrams, and local stress cloud diagrams that can only be obtained after the simulation is completed.

[0077] After obtaining the first file, the second file, and the simulation result graphs, the electronic device also associates the first file, the second file, and each simulation result graph to automatically generate a simulation analysis report.

[0078] Using this approach, the electronic device outputs a first file indicating the stiffness simulation results, a second file indicating the static strength simulation results, and various simulation result graphs, which facilitates problem localization and improves collaboration efficiency.

[0079] Figure 3 This is another flowchart of the planetary carrier automated simulation method provided in this application. This implementation includes: 301. Obtain the assembly model and physical parameters of the planetary carrier.

[0080] 302. Rename each part in the assembly model and simplify the assembly model to obtain an intermediate model.

[0081] 303. Create different types of face sets based on the intermediate model, and generate a simplified geometric model with attached named selection sets based on the face sets and geometric parameters.

[0082] 304. Generate a mesh parameter file based on the named selection set.

[0083] 305. Obtain the gear parameter file and the torque of the planetary carrier under different working conditions.

[0084] It should be noted that steps 301 and 305 are not strictly in any particular order.

[0085] 306. Based on the gear parameter file and the torque of the planetary carrier under different operating conditions, determine the load parameters of the planetary carrier under different operating conditions.

[0086] 307. Set up a simplified geometric model based on the physical parameters in the simulation parameters, perform mesh generation on the simplified geometric model based on the mesh parameter file, and apply the load parameters of the planetary carrier under different working conditions to the simplified geometric model to generate a finite element model.

[0087] Optionally, after performing mesh generation on the simplified geometric model, the electronic device also determines whether the mesh quality is acceptable. If the mesh quality is unacceptable, the mesh parameter file is edited and the mesh generation is performed again.

[0088] 308. Simulate the static strength and stiffness of the planetary carrier using a finite element model.

[0089] 309. Output the first file, the second file, and the simulation result graph.

[0090] 310. Link the first file, the second file, and each simulation result graph to automatically generate a simulation analysis report.

[0091] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0092] Figure 4 This is a schematic diagram of an automated planetary carrier simulation device provided in an embodiment of this application. The simulation device 400 includes: an acquisition module 41, a processing module 42, a generation module 43, a determination module 44, and a simulation module 45.

[0093] The acquisition module 41 is used to acquire the assembly model of the planet carrier, gear parameter file, geometric parameters and simulation parameters. The gear parameter file is the basis for determining the force source and magnitude of the planet carrier. The geometric parameters are used to describe the size and characteristics of the planet carrier. The simulation parameters include at least the torque of the planet carrier under different working conditions. Processing module 42 is used to generate a simplified geometric model with attached naming selection sets based on the assembly model and the geometric parameters. The geometric objects in the naming selection sets have the same attributes and correspond to the same name, and different naming selection sets have different names. Generation module 43 is used to generate a mesh parameter file based on the naming selection set. The content of the mesh parameter file includes the name of each naming selection set and the parameters required to perform mesh generation on the simplified geometric model. The determination module 44 is used to determine the load parameters of the planetary carrier under different working conditions based on the gear parameter file and the torque of the planetary carrier under different working conditions; The simulation module 45 is used to simulate the static strength and stiffness of the planetary carrier based on the simplified geometric model, the mesh parameter file, and the load parameters of the planetary carrier under different working conditions.

[0094] In one feasible implementation, the processing module 42 is used to rename and simplify each part in the assembly model to obtain an intermediate model, wherein the intermediate model is a simplified geometric model without attached naming selection sets; multiple face sets are created based on the intermediate model, wherein each face belonging to the same face set has the same attributes; and the faces contained in the intermediate model are divided according to the multiple face sets and the geometric parameters to obtain the simplified geometric model with attached naming selection sets.

[0095] In one feasible implementation, the gear parameter file is the gear parameter file of the planet carrier of the multi-stage planetary gear system included in the wind turbine gearbox. The determining module 44 is used to determine the tangential force of the planetary pin shaft, the bending moment of the planetary pin shaft, and the axial force transmitted to the k-th stage planetary gear system by the planet carrier corresponding to the k-th stage planetary gear system based on the gear parameter file and the torque of the planet carrier under different operating conditions, thereby obtaining the load parameters of the planet carrier corresponding to the k-th stage planetary gear system under different operating conditions. The k-th stage planetary gear system and the k-1 stage planetary gear system are two adjacent stages of the multi-stage planetary gear system.

[0096] In one feasible implementation, the simulation module 45 is used to generate a finite element model based on the simplified geometric model, the mesh parameter file, and the load parameters of the planetary carrier under different working conditions; and to simulate the static strength and stiffness of the planetary carrier using the finite element model.

[0097] In one feasible implementation, during the process of automatically generating a finite element model based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions, the simulation module 45 is used to set the simplified geometric model according to the physical parameters in the simulation parameters, perform mesh generation on the simplified geometric model according to the mesh parameter file, and apply the load parameters of the planetary carrier under different working conditions to the simplified geometric model to generate the finite element model. Setting the simplified geometric model includes assigning material properties to the parts in the simplified geometric model, setting contact pairs according to the naming selection set, and creating local coordinate systems and paths for each pin in the simplified geometric model.

[0098] In one feasible implementation, different operating conditions include rated operating condition, ultimate positive torque operating condition, and ultimate negative torque operating condition. During the simulation module 45's simulation of the static strength and stiffness of the planetary carrier using the finite element model, for the rated operating condition, the tangential deformation results are extracted from the finite element model based on the paths of each pin in the simplified geometric model to simulate the stiffness of the planetary carrier. For the ultimate positive torque operating condition and the ultimate negative torque operating condition, multiple stress hotspots are determined from the finite element model based on the naming selection set, and the static strength of the planetary carrier is simulated using the finite element model and the multiple stress hotspots.

[0099] In one feasible implementation, after the simulation module 45 simulates the static strength of the planetary carrier using the finite element model and the plurality of stress hotspots, the processing module 42 is further configured to determine a safety factor for each of the plurality of stress hotspots, obtaining the safety factor for each stress hotspot. The safety factor includes the ratio of the yield strength to the maximum principal stress under the ultimate positive torque condition, and the ratio of the yield strength to the maximum principal stress under the ultimate negative torque condition. Based on the safety factor of each stress hotspot, the static strength of the planetary carrier is checked.

[0100] In one feasible implementation, after the simulation module 45 simulates the static strength and stiffness of the planetary carrier based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions, the processing module 42 is further configured to generate a first file and a second file. The first file indicates the stiffness simulation result of the planetary carrier, and the second file indicates the static strength simulation result of the planetary carrier. The first file, the second file, and the simulation result diagram are output. The simulation result diagram includes at least one of a geometric model diagram, a mesh model diagram, a tangential deformation cloud diagram, a global stress cloud diagram, and a local stress cloud diagram. The mesh model diagram displays the mesh model obtained by meshing the simplified geometric model. The tangential deformation cloud diagram displays the tangential deformation result of each pin in the simplified geometric model. The global stress cloud diagram displays the stress distribution of the planetary carrier, and the local stress cloud diagram displays the stress of the stress hotspots of the planetary carrier.

[0101] The planetary carrier automated simulation device provided in this application embodiment can perform the actions of the electronic devices in the above embodiments. Its implementation principle and technical effect are similar, and will not be described again here.

[0102] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 500 includes: Processor 51 and memory 52; The memory 52 stores computer instructions and test data; The processor 51 executes the computer instructions stored in the memory 52, causing the processor 51 to perform the planetary carrier automated simulation method as described above.

[0103] The specific implementation process of processor 51 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0104] Optionally, the electronic device 500 also includes a communication component 53. The processor 51, memory 52, and communication component 53 can be connected via a bus 54.

[0105] This application also provides a computer-readable storage medium storing computer instructions, which, when executed by a processor, are used to implement the planetary carrier automated simulation method described above.

[0106] This application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the planetary carrier automated simulation method as described above.

[0107] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0108] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An automated simulation method for planetary carriers, characterized in that, include: Obtain the assembly model, gear parameter file, geometric parameters, and simulation parameters of the planetary carrier. The gear parameter file is the basis for determining the force source and magnitude of the planetary carrier. The geometric parameters are used to describe the size and characteristics of the planetary carrier. The simulation parameters include at least the torque of the planetary carrier under different working conditions. A simplified geometric model with attached naming selection sets is automatically generated based on the assembly model and the geometric parameters. Geometric objects within the naming selection sets have the same attributes and correspond to the same name, while different naming selection sets have different names. A mesh parameter file is generated based on the naming selection set. The mesh parameter file contains the name of each naming selection set and the parameters required to perform mesh generation on the simplified geometric model. Based on the gear parameter file and the torque of the planetary carrier under different operating conditions, determine the load parameters of the planetary carrier under different operating conditions; Based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions, the static strength and stiffness of the planetary carrier are automatically simulated.

2. The method according to claim 1, characterized in that, The automatic generation of a simplified geometric model with attached naming selection sets based on the assembly model and the geometric parameters includes: Each part in the assembly model is renamed and the assembly model is simplified to obtain an intermediate model, which is a simplified geometric model without an attached naming selection set; Multiple face sets are created based on the intermediate model, and the faces belonging to the same face set have the same attributes; The intermediate model is divided into faces based on the multiple face sets and the geometric parameters to obtain the simplified geometric model with attached name selection sets.

3. The method according to claim 1, characterized in that, The gear parameter file is the gear parameter file of the planetary carrier corresponding to the multi-stage planetary gear train included in the wind turbine gearbox. The step of determining the load parameters of the planetary carrier under different operating conditions based on the gear parameter file and the torque of the planetary carrier under different operating conditions includes: Based on the gear parameter file and the torque of the planetary carrier under different working conditions, the tangential force of the planetary pin shaft, the bending moment of the planetary pin shaft, and the axial force transmitted from the (k-1)th stage planetary carrier to the k-th stage planetary carrier are determined, thus obtaining the load parameters of the planetary carrier corresponding to the k-th stage planetary carrier under different working conditions. The k-th stage planetary carrier and the (k-1)th stage planetary carrier are two adjacent stages in the multi-stage planetary carrier system.

4. The method according to any one of claims 1 to 3, characterized in that, The simulation of the static strength and stiffness of the planetary carrier based on the simplified geometric model, mesh parameter file, simulation parameters, and load parameters of the planetary carrier under different operating conditions includes: A finite element model is automatically generated based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions. The static strength and stiffness of the planetary carrier were simulated using the finite element model.

5. The method according to claim 4, characterized in that, The automatic generation of a finite element model based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different operating conditions includes: The simplified geometric model is set according to the physical parameters in the simulation parameters, the simplified geometric model is meshed according to the mesh parameter file, and the load parameters of the planetary carrier under different working conditions are applied to the simplified geometric model to generate the finite element model. The setting of the simplified geometric model includes assigning material properties to the parts in the simplified geometric model, setting contact pairs according to the naming selection set, and creating local coordinate systems and paths for each pin in the simplified geometric model.

6. The method according to claim 5, characterized in that, Different operating conditions include rated operating condition, ultimate positive torque operating condition, and ultimate negative torque operating condition. The simulation of the static strength and stiffness of the planetary carrier using the finite element model includes: For the rated working condition, based on the path of each pin in the simplified geometric model, the tangential deformation results are extracted from the finite element model to simulate the stiffness of the planetary carrier. For the extreme positive torque condition and the extreme negative torque condition, multiple stress hotspots are determined from the finite element model according to the naming selection set, and the static strength of the planetary carrier is simulated using the finite element model and the multiple stress hotspots.

7. The method according to claim 6, characterized in that, After simulating the static strength of the planetary carrier using the finite element model and the multiple stress hotspots, the method further includes: A safety factor is determined for each of the plurality of stress hotspots to obtain the safety factor for each stress hotspot. The safety factor includes the ratio of the yield strength to the maximum principal stress under the ultimate positive torque condition, and the ratio of the yield strength to the maximum principal stress under the ultimate negative torque condition. The static strength of the planetary carrier is checked based on the safety factor of each stress hotspot among the multiple stress hotspots.

8. The method according to any one of claims 1 to 7, characterized in that, After simulating the static strength and stiffness of the planetary carrier based on the simplified geometric model, the mesh parameter file, the simulation parameters, and the load parameters of the planetary carrier under different working conditions, the process further includes: Generate a first file and a second file, the first file being used to indicate the stiffness simulation results of the planetary carrier, and the second file being used to indicate the static strength simulation results of the planetary carrier; Output the first file, the second file, and simulation result diagrams. The simulation result diagrams include at least one of a geometric model diagram, a mesh model diagram, a tangential deformation contour map, a global stress contour map, and a local stress contour map. The mesh model diagram is used to display the mesh model obtained by performing mesh generation on the simplified geometric model. The tangential deformation contour map is used to display the tangential deformation results of each pin in the simplified geometric model. The global stress contour map is used to display the stress distribution of the planetary carrier. The local stress contour map is used to display the stress of the stress hotspots of the planetary carrier.

9. An electronic device comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it causes the electronic device to implement the method as described in any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 8.

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