CN-122020886-A - Method, system, equipment and storage medium for designing residual stress of wheel disc

CN122020886ACN 122020886 ACN122020886 ACN 122020886ACN-122020886-A

Abstract

The invention relates to the technical field of design of residual stress of a wheel disc of an aeroengine, and discloses a method, a system, equipment and a storage medium for designing the residual stress of the wheel disc, wherein the method comprises the steps of obtaining the residual stress distribution on a section of the wheel disc after pre-rotation reinforcement based on simulation analysis of a three-dimensional geometric model of the wheel disc; the method comprises the steps of measuring the profile change of a tangent plane of a wheel disc after actual pre-rotation strengthening, forming a displacement field through data processing, establishing a wheel disc half model, applying the displacement field to the wheel disc half model, inverting and reconstructing residual stress distribution in the wheel disc after actual pre-rotation strengthening, comparing residual stress distribution obtained through simulation analysis with residual stress distribution obtained through inversion reconstruction, correcting a three-dimensional geometric model of the wheel disc based on a comparison result, and using the corrected model for designing the residual stress of the wheel disc pre-rotation strengthening. The method and the device can achieve reliable residual stress acquisition, overcome the limitation of traditional measurement, and provide basis for stress design and service life assessment.

Inventors

SHI SHANGUANG
ZHA XIAOHUI
BAO YUAN
ZENG XINYUN
MA LI
JIN HAILIANG
WANG ZHONGJIN
HUANG CHONGGAO

Assignees

中国航发湖南动力机械研究所

Dates

Publication Date: 20260512
Application Date: 20260113

Claims (10)

1. The design method of the residual stress of the wheel disc is characterized by comprising the following steps of: Establishing a three-dimensional geometric model of the wheel disc, and acquiring residual stress distribution on a tangent plane of the wheel disc after pre-rotation reinforcement based on simulation analysis of the three-dimensional geometric model of the wheel disc; measuring the profile change of the section of the wheel disc after actual pre-rotation reinforcement, and forming a displacement field through data processing; Establishing a wheel disc half model, applying the displacement field to the wheel disc half model, and inverting and reconstructing residual stress distribution in the wheel disc after actual pre-rotation reinforcement; And (3) comparing the residual stress distribution obtained by the simulation analysis with the residual stress distribution obtained by the inversion reconstruction, correcting the three-dimensional geometric model of the wheel disc based on the comparison result, and using the corrected model for the design of the residual stress of the pre-rotation reinforcement of the wheel disc.
2. The method of claim 1, wherein establishing a three-dimensional geometric model of the wheel disc, and obtaining the distribution of residual stress on the tangent plane of the wheel disc after pre-rotation reinforcement based on simulation analysis of the three-dimensional geometric model of the wheel disc, comprises: Establishing a three-dimensional geometric model of the wheel disc, and defining material parameters of the wheel disc; Performing grid division on the wheel disc three-dimensional geometric model and setting boundary conditions to obtain a processed wheel disc three-dimensional geometric model; Applying a rotational speed load for enabling the wheel disc to reach a target overspeed rotational speed in the processed three-dimensional geometric model of the wheel disc; and solving the process from the overspeed rotating speed of the wheel disc to the unloading of the rotating speed load to zero, and obtaining the residual stress distribution data on the tangent plane of the wheel disc.
3. The method of designing a wheel disc residual stress according to claim 1, wherein measuring a change in profile of a section of the wheel disc after actual pre-rotation strengthening and forming a displacement field through data processing comprises: Carrying out slow wire cutting on the wheel disc subjected to pre-rotation reinforcement, and cutting the wheel disc into two parts along a radial plane passing through the axle center of the wheel disc; Measuring the cut surfaces of the two parts formed after cutting by using a three-coordinate measuring instrument to obtain two groups of profile data of the cut surfaces; and carrying out coordinate alignment and smoothing treatment on the two groups of section profile data, and averaging the two groups of section profile data to form a displacement field representing stress release.
4. The method of designing a wheel disc residual stress according to claim 2, wherein performing coordinate alignment and smoothing on the two sets of section profile data and averaging the two sets of section profile data to form a displacement field indicative of stress relief, comprises: translating and reversing one set of section profile data in a Cartesian coordinate system along a cutting direction so as to overlap the other set of section profile data; And adopting a polynomial fit to the two overlapped groups of section profile data, and carrying out smoothing treatment on the two overlapped groups of section profile data.
5. The method of designing a wheel disc residual stress according to claim 2, wherein the coordinate alignment and smoothing process is performed on the two sets of section profile data, and the two sets of section profile data are averaged to form a displacement field indicative of stress relief, and then comprising: And mapping the displacement field onto a regular public coordinate grid through an interpolation method, wherein the regular public coordinate grid is matched with node distribution of the wheel disc three-dimensional geometric model.
6. The method of claim 1, wherein creating a wheel half model, applying the displacement field to the wheel half model, inverting and reconstructing a residual stress distribution inside the wheel after actual pre-rotation strengthening, comprises: Establishing a finite element half model of one side of the wheel disc after cutting, wherein a cutting surface is set as a free surface; applying the displacement field to corresponding nodes of the cutting surface of the finite element half model by taking the opposite direction as a displacement boundary condition; And (5) performing line elasticity implicit finite element calculation to obtain residual stress distribution before cutting.
7. The method of designing a wheel disc residual stress according to claim 1, wherein comparing the residual stress distribution obtained by the simulation analysis with the residual stress distribution obtained by the inversion reconstruction, correcting the three-dimensional geometric model of the wheel disc based on the comparison result, and using the corrected model for the design of the residual stress for the pre-rotation reinforcement of the wheel disc, comprises: comparing the simulation analysis with the residual stress peak value, the zero crossing point position and the stress distribution trend of the key part obtained by inversion reconstruction to obtain a comparison result; if the comparison result has deviation, a weighting factor or a correction coefficient is applied to the three-dimensional geometric model of the wheel disc for correction; and using the corrected three-dimensional geometric model of the wheel disc for predicting the residual stress distribution under different working conditions of the pre-rotation speed.
8. A wheel disc residual stress design system, comprising: The simulation analysis unit is used for establishing a three-dimensional geometric model of the wheel disc, and acquiring residual stress distribution on a tangent plane of the wheel disc after pre-rotation reinforcement based on simulation analysis of the three-dimensional geometric model of the wheel disc; the measuring and calculating unit is used for measuring the profile change of the section of the wheel disc after actual pre-rotation reinforcement and forming a displacement field through data processing; The inversion reconstruction unit is used for establishing a wheel disc half model, applying the displacement field to the wheel disc half model, and inverting and reconstructing residual stress distribution in the wheel disc after actual pre-rotation reinforcement; the comparison correction unit is used for comparing the residual stress distribution obtained by the simulation analysis with the residual stress distribution obtained by the inversion reconstruction, correcting the three-dimensional geometric model of the wheel disc based on the comparison result, and using the corrected model for the design of the residual stress of the pre-rotation reinforcement of the wheel disc.
9. An electronic device, comprising: A processor and a memory; The memory is used for storing a computer program, and the processor calls the computer program stored in the memory to execute the method for designing the residual stress of the wheel disc according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored which, when executed by a processor, enables the processor to perform the method of designing the wheel disc residual stress according to any one of claims 1 to 7.

Description

Method, system, equipment and storage medium for designing residual stress of wheel disc Technical Field The disclosure relates to the technical field of design of residual stress of an aircraft engine wheel disc, and further relates to the technical field of fatigue life of an aircraft engine structure, in particular to a method, a system, equipment and a storage medium for designing the residual stress of the wheel disc, and particularly relates to a method for designing the residual stress by combining a pre-rotation reinforced wheel disc residual stress release finite element simulation and a contour measurement method. Background In the long-term service process of the aeroengine wheel disc, the central area bears larger stress, and the central area is a dangerous area in a working state. In order to improve the service life, a pre-rotation strain strengthening technology can be adopted, and the wheel disc is subjected to a larger centrifugal load by applying an ultrahigh rotating speed, so that plastic deformation is induced in a local area, and therefore, residual compressive stress is formed in the disc center, and the subsequent yield strength is improved. The pre-rotation strengthening effect is closely related to the state of the generated residual stress, and in order to obtain the ideal residual stress and distribution, the pre-rotation parameters need to be reasonably designed and optimized. The finite element simulation analysis is an effective means for researching the distribution of the residual stress in the wheel disc, and the magnitude and the distribution of the residual stress of the wheel disc after the pre-rotation strain strengthening can be calculated by establishing a finite element model, inputting parameters of a constitutive model of a material, boundary conditions and the like, so that guidance is provided for the control of the residual stress. However, pure simulation analysis often requires experimental verification. Because the residual stress field inside the wheel disc after pre-rotation reinforcement is complex and difficult to directly measure, a special measuring method is needed to obtain stress distribution. For experimental measurement of residual stress, the current common methods have limitations. The X-ray diffraction can only reflect the stress state of the surface layer of the material, deep information is difficult to obtain, the blind hole method and other means can measure partial internal stress, but the method has partial destructiveness and limited precision, and the neutron diffraction can realize deep stress measurement, but has the defects of severe test conditions, expensive equipment and difficult general application. The contour method is a lossy residual stress test method. According to the method, a workpiece is cut into two parts along a plane to be measured, and residual stress is released after cutting to cause deformation of a notch. Therefore, in order to solve the problem that the residual stress of the wheel disc after pre-rotation reinforcement is difficult to directly measure, a method combining finite element simulation analysis and contour measurement is necessary to obtain reliable residual stress magnitude and distribution, and support is provided for the design of the residual stress. Disclosure of Invention Embodiments of the present disclosure provide a method, system, apparatus, and storage medium for designing a wheel disc residual stress, so as to solve or alleviate one or more of the above technical problems in the prior art. According to one aspect of the present disclosure, there is provided a method of designing a residual stress of a wheel disc, including: Establishing a three-dimensional geometric model of the wheel disc, and acquiring residual stress distribution on a tangent plane of the wheel disc after pre-rotation reinforcement based on simulation analysis of the three-dimensional geometric model of the wheel disc; measuring the profile change of the section of the wheel disc after actual pre-rotation reinforcement, and forming a displacement field through data processing; Establishing a wheel disc half model, applying the displacement field to the wheel disc half model, and inverting and reconstructing residual stress distribution in the wheel disc after actual pre-rotation reinforcement; And (3) comparing the residual stress distribution obtained by the simulation analysis with the residual stress distribution obtained by the inversion reconstruction, correcting the three-dimensional geometric model of the wheel disc based on the comparison result, and using the corrected model for the design of the residual stress of the pre-rotation reinforcement of the wheel disc. In one possible implementation manner, establishing a three-dimensional geometric model of the wheel disc, and acquiring residual stress distribution on a section of the wheel disc after pre-rotation strengthening based on simulation analysis of the t