CN-121980695-A - Fatigue strength simulation method, apparatus, and readable storage medium

CN121980695ACN 121980695 ACN121980695 ACN 121980695ACN-121980695-A

Abstract

The application provides a fatigue strength simulation method, equipment and a readable storage medium, wherein electronic equipment establishes a finite element model aiming at a planet carrier to be simulated for fatigue strength, and outputting the finite element simulation file set of the planet carrier under the unit working condition by using the finite element model. And then, the electronic equipment generates an input file set of simulation software according to the time sequence load file and the finite element simulation file set of the planet carrier. Finally, the input file set is processed by using simulation software to obtain a simulation result of the fatigue strength of the planet carrier, so that the automation degree is high, the accuracy is high, the fatigue strength simulation efficiency is greatly improved, and the labor cost is saved.

Inventors

SHI YU
SU CAIPING
WANG BINBIN
CHEN ZHIYU

Assignees

远景能源有限公司

Dates

Publication Date: 20260505
Application Date: 20251217

Claims (10)

1. A method for simulating fatigue strength, comprising: Establishing a finite element model aiming at a planet carrier with fatigue strength to be simulated; outputting a finite element simulation file set of the planet carrier under a unit working condition by using the finite element model; Generating an input file set of the simulation software according to the time sequence load file of the planet carrier and the finite element simulation file set, wherein the files in the input file set are used for supporting the simulation software to finish the calculation of the fatigue strength of the planet carrier, and the time sequence load file is used for indicating the load of the planet carrier at different time points; and processing the input file set by using the simulation software to obtain a simulation result of the fatigue strength of the planet carrier.
2. The method according to claim 1, wherein the establishing a finite element model for the planet carrier for which fatigue strength is to be simulated comprises: Determining an assembly model of the planet carrier, geometric parameters and load parameters of the planet carrier under different working conditions, wherein the geometric parameters are used for describing the size and characteristics of the planet carrier, and the different working conditions at least comprise an initial working condition, a unit positive torque working condition, a unit negative torque working condition, a unit positive torque working condition with the initial state removed and a unit negative torque working condition with the initial state removed; Generating a simplified geometric model with a naming selection set attached thereto from the assembly model and the geometric parameters, the naming selection set being indicative of a stress hotspot region of the planet carrier; load parameters under different conditions are applied to the simplified geometric model to build the finite element model.
3. The method as recited in claim 2, further comprising: Setting the simplified geometric model according to the physical parameters of the planet carrier to endow the simplified geometric model with material properties, setting contact pairs according to the naming selection set, and creating a local coordinate system and a path for each pin roll in the simplified geometric model; And executing grid division on the simplified set model according to a grid parameter file, wherein the content of the grid parameter file comprises names of each naming selection set and parameters required for executing grid division on the simplified geometric model.
4. A method according to any one of claims 1 to 3, wherein the outputting, by using the finite element model, the finite element simulation file set of the planet carrier under the unit working condition includes: before the finite element model is calculated, setting output control of the finite element model so that the finite element model only outputs a finite element result file of each stress hot spot area; After the finite element model is calculated, node information of all nodes in a naming selection set of the planet carrier is extracted according to the finite element result file, and node information files of all nodes are output, wherein the naming selection set indicates a stress hot spot area of the planet carrier; Splitting the node information file to obtain the node information file of each stress hot spot area of the planet carrier, wherein the finite element simulation file set comprises the finite element result file and the node information file of each stress hot spot area of the planet carrier.
5. A method according to any one of claims 1 to 3, wherein the generating the input file set of the simulation software from the time-series load file of the planet carrier and the finite element simulation file set includes: performing positive-negative separation processing on the time sequence load file to obtain an intermediate file, wherein the intermediate file comprises a first column, a second column and a third column, the first column is time, the second column is time sequence positive load in the time sequence load file, and the third column is time sequence negative load in the time sequence load file; Converting the intermediate file into a target file in a target format, wherein the target format is a format which can be identified by the simulation software; And generating an input file set of the simulation software according to the target file and the finite element simulation file set.
6. The method of claim 5, wherein generating the input file set of the simulation software from the target file, the finite element simulation file set, comprises: Writing a load configuration file according to the target file and the finite element simulation file set, wherein the load configuration file is used for acquiring stress time sequence loads of all nodes of the stress hot spot on the planet carrier; And writing a fatigue calculation configuration file according to the target file, the finite element simulation file set and the load configuration file, wherein the fatigue calculation configuration file is used for indicating parameters and logic required for fatigue strength simulation of the planet carrier, and the files in the input file set comprise the target file, the load configuration file and the fatigue calculation configuration file.
7. A method according to any one of claims 1 to 3, wherein said processing said input file set with said simulation software to obtain a simulation result of fatigue strength of said planet carrier comprises: processing the input file set by using the simulation software to obtain a first file and a second file, wherein the first file is used for indicating the fatigue damage result of the planet carrier, and the second file is used for indicating the safety coefficient of the planet carrier; For each stress hot spot on the planet carrier, determining a node with the largest fatigue damage in the stress hot spot according to the first file, and determining the safety coefficient of the node with the largest fatigue damage according to the second file; And generating a third file according to the node with the largest fatigue damage in each stress hot spot on the planet carrier and the corresponding safety coefficient, wherein the simulation result comprises the first file, the second file and the third file.
8. The method of claim 7, wherein the processing the input file set with the simulation software to obtain the first file and the second file further comprises: Applying unit working conditions to the finite element model and completing calculation; The first file is imported into the finite element model which completes the calculation to obtain a first cloud image, the second file is imported into the finite element model which completes the calculation to obtain a second cloud image, the first cloud image is used for visually representing the fatigue damage distribution of the planet carrier, and the second cloud image is used for visually representing the safety coefficient distribution of the planet carrier; and outputting a first picture according to the first cloud picture, and outputting a second picture according to the second cloud picture.
9. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, wherein execution of the computer program by the processor causes the electronic device to implement the method of any one of claims 1 to 8.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method according to any one of claims 1 to 8.

Description

Fatigue strength simulation method, apparatus, and readable storage medium Technical Field The application relates to the technical field of wind power generation, in particular to a fatigue strength simulation method, equipment and a readable storage medium. Background With the continuous development of society, the demand for energy is increasing, and wind energy is becoming a clean renewable energy source and is increasingly valued in all countries of the world. The wind generating set is a main device for generating electric energy by utilizing wind energy, such as a wind generating set, a fan and the like. The wind power gear box is a key transmission part for connecting a wind wheel and a generator in a wind generating set and comprises a planet carrier, a sun wheel, a planet wheel and the like, wherein the planet carrier is a key stress part of the wind power gear box. The mechanical indexes of the planet carrier comprise static strength, rigidity and fatigue strength. Wherein, fatigue strength refers to the ability of the planet carrier to resist fatigue crack initiation and propagation under load until fracture. The fatigue strength simulation provides scientific basis for optimization, reliability verification and the like of the planet carrier by predicting fatigue failure risk of the planet carrier in the life cycle. In the simulation method of the traditional theoretical analysis method, the fatigue strength of each stage of planet carrier of the gearbox is simulated by simplifying the complex structure of the planet carrier and the like based on the theory of material mechanics and fatigue accumulated damage. The traditional simulation method is difficult to accurately capture the actual stress characteristics due to the need of greatly simplifying the complex structure of the planet carrier, so that the simulation result has poor precision and low reliability. Disclosure of Invention The application provides a fatigue strength simulation method, equipment and a readable storage medium, which automatically generate a planet carrier finite element model and a finite element simulation file set under unit working condition, combine a time sequence load file to generate an input file set of simulation software, and process the input file set by the simulation software to complete fatigue strength simulation, thereby having high automation degree and high accuracy. In a first aspect, the present application provides a method for simulating fatigue strength, comprising: Establishing a finite element model aiming at a planet carrier with fatigue strength to be simulated; outputting a finite element simulation file set of the planet carrier under a unit working condition by using the finite element model; Generating an input file set of the simulation software according to the time sequence load file of the planet carrier and the finite element simulation file set, wherein the files in the input file set are used for supporting the simulation software to finish the calculation of the fatigue strength of the planet carrier, and the time sequence load file is used for indicating the load of the planet carrier at different time points; and processing the input file set by using the simulation software to obtain a simulation result of the fatigue strength of the planet carrier. In a second aspect, the present application provides a fatigue strength simulation apparatus, comprising: The establishing module is used for establishing a finite element model aiming at the planet carrier with the fatigue strength to be simulated; the output module is used for outputting a finite element simulation file set of the planet carrier under a unit working condition by utilizing the finite element model; The generation module is used for generating an input file set of the simulation software according to the time sequence load file of the planet carrier and the finite element simulation file set, wherein the files in the input file set are used for supporting the simulation software to finish the calculation of the fatigue strength of the planet carrier, and the time sequence load file is used for indicating the load of the planet carrier at different time points; And the simulation module is used for processing the input file set by using the simulation software so as to obtain a simulation result of the fatigue strength of the planet carrier. In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to cause the electronic device to implement the method as described above in the first aspect or the various possible implementations of the first aspect. In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored therein computer instructions which, when executed by a proces