CN-119989720-B - Impact pit quantization method, device, electronic equipment and storage medium

CN119989720BCN 119989720 BCN119989720 BCN 119989720BCN-119989720-B

Abstract

The invention relates to the technical field of impact pits, in particular to an impact pit equivalence method, an impact pit equivalence device, electronic equipment and a storage medium. The method comprises the steps of obtaining initial size information of a plurality of simulated impact pits generated by impacting a target object, obtaining maximum stress values corresponding to the simulated impact pits, and generating target equivalent relationships corresponding to the simulated impact pits according to relationships between the initial depth and the initial radius and the maximum stress values. The accuracy of the generated target equivalent relationship is ensured. And further realizing the equivalent quantification of the impact simulation impact pit. Therefore, the quantitative relation of the size and the stress characteristics between the non-standard impact simulation impact pit defect and the standard impact simulation impact pit defect can be established according to the target equivalent relation.

Inventors

LI JIAN
QIAO JIXIANG
ZHANG RUNZE
ZHANG DE
YI ZHENGYU

Assignees

中国航发湖南动力机械研究所

Dates

Publication Date: 20260508
Application Date: 20250211

Claims (8)

1. A method of impact pit equivalence, the method comprising: acquiring initial size information of a plurality of simulated impact pits generated by impacting a target object, wherein the initial size information comprises initial depth and initial radius; Obtaining the maximum stress value corresponding to each simulated impact pit; generating a target equivalent relation corresponding to the impact simulation impact pit according to the relation between the initial depth and the initial radius and the maximum stress values respectively; The obtaining the maximum stress value corresponding to each simulated impact pit includes: obtaining the maximum static load born by the target object; The maximum static load is applied to the simulated impact pit model in a proper mode, and the direction and the action mode of the maximum static load are defined to be consistent with the stress condition of the target object in actual use; According to the material properties, the geometric shapes, the boundary conditions and the loading conditions of the simulated impact pit model, solving the balance equation of the structure to obtain the displacement field and the defect stress field of the simulated impact pit model under the action of the maximum static load; Analyzing the defect stress field aiming at each simulated impact pit, and determining the maximum stress value corresponding to the simulated impact pit; The analyzing the defect stress field to determine the maximum stress value corresponding to the simulated impact pit comprises the following steps: Based on preset finite element analysis software, obtaining defect stress field data of each simulated impact pit under the maximum static load condition, wherein the defect stress field data comprises distribution information of each component of a stress tensor in the whole simulation area; Performing data preprocessing on the defect stress field data to generate target stress field data; according to the finite element theory, traversing all nodes of the simulated impact pit by a preset calculation method, and calculating the stress component of each node; For each node, considering all units adjacent to the node, and calculating stress values of the node in all directions according to the stress states of the units and the geometric relationship between the nodes and the units; Orderly storing the calculated node stress values according to the node numbers to form node stress data; comparing the stress component sizes of the nodes in different directions, and determining the main stress value of each node; and comparing the main stress values corresponding to the nodes, and determining the maximum main stress value as the maximum stress value.
2. The method of claim 1, wherein the obtaining initial size information of a plurality of simulated impingement pockets generated for impingement on the target object comprises: acquiring a target material corresponding to the target object; Determining a material dynamic deformation constitutive parameter corresponding to the target material according to the target material; simulating impact on the target object in preset finite element analysis software according to the dynamic deformation constitutive parameters of the material, and generating simulated impact pits; And acquiring the initial size information corresponding to each simulated impact pit, wherein the initial size information corresponding to each simulated impact pit is different.
3. The method of claim 1, wherein generating a target equivalent relationship for the impact simulated impact pit based on the relationship between the initial depth and the initial radius and each of the maximum stress values, respectively, comprises: Respectively carrying out normalization processing on each initial depth, each initial radius and each maximum stress value to generate each target depth, each target radius and each target maximum stress value; And generating a target equivalent relation corresponding to the impact simulation impact pit according to the relation between the target depth and the target radius and each target maximum stress value.
4. A method according to claim 3, wherein said generating a target equivalent relationship for an impact simulated impact dimple based on the relationship between the target depth and the target radius and each of the target maximum stress values, respectively, comprises: fitting each target depth and each target maximum stress value according to the relation between each target depth and each target maximum stress value, and generating a first equivalent relation function between depth and maximum stress value; Fitting each target radius and each target maximum stress value according to the relation between each target radius and each target maximum stress value, and generating a second equivalent relation function between the radius and the maximum stress value; and generating the target equivalent relation according to the first equivalent relation function and the second equivalent relation function.
5. The method of claim 4, wherein generating the target equivalent relationship from the first equivalent relationship function and the second equivalent relationship function comprises: multiplying the first equivalent relation function and the second equivalent relation function to generate the target equivalent relation.
6. An impact pit-quantifying apparatus, the apparatus comprising: the device comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring initial size information of a plurality of simulated impact pits generated by impacting a target object, and the initial size information comprises initial depth and initial radius; The second acquisition module is used for acquiring maximum stress values corresponding to the simulated impact pits, wherein the acquisition of the maximum stress values corresponding to the simulated impact pits comprises the steps of acquiring maximum static loads which can be borne by the target object, applying the maximum static loads to a simulated impact pit model in a proper mode, defining the direction and the action mode of the maximum static loads to enable the maximum static loads to coincide with the stress condition of the target object in actual use, solving a balance equation of a structure according to the material attribute, the geometric shape, the boundary condition and the loading condition of the simulated impact pit model to obtain a displacement field and a defect field of the simulated impact pit model under the action of the maximum static loads, analyzing the defect stress field to determine the maximum stress values corresponding to the simulated impact pits for the simulated impact pits, analyzing the defect field to determine the maximum stress values corresponding to the simulated impact pits, and obtaining the defect field of the simulated impact under the maximum static loads based on pre-set meta analysis software, calculating the stress components of all the stress field by the pre-stress units according to the material attribute, the geometric shape, the boundary condition and the loading condition of the simulated impact pit model, calculating the stress units, and the stress units, the stress units and the stress units, the stress values of the nodes in all directions are calculated, the calculated stress values of the nodes are orderly stored according to the node numbers to form node stress data, the stress component sizes of the nodes in different directions are compared, and the main stress values of the nodes are determined; and the generating module is used for generating a target equivalent relation corresponding to the impact simulation impact pit according to the relation between the initial depth and the initial radius and the maximum stress values.
7. An electronic device, comprising: A memory and a processor communicatively coupled to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of shock pit equivalence of any of claims 1 to 5.
8. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the method of impact pit equivalence of any one of claims 1 to 5.

Description

Impact pit quantization method, device, electronic equipment and storage medium Technical Field The invention relates to the technical field of impact pits, in particular to an impact pit equivalence method, an impact pit equivalence device, electronic equipment and a storage medium. Background In the field of modern engineering, the performance and safety of mechanical load-carrying structures are of great concern. Traditionally, the useful life of a structural member is determined by the safe life method, which is designed and evaluated based on the assumption that the structure is in a perfect condition without defects. However, in practice, the structural members inevitably suffer from various factors from the processing of raw materials to the manufacturing process and then to the whole life cycle of the members in use. The presence of these defects has a significant impact on the performance and service life of the structure and may even jeopardize the safety of the structure. Defect tolerant safety life design approaches have evolved as a more advanced and reliable design concept. On the basis of the safe life design method, defects and damages generated in the processing and manufacturing process and during the service period of the structural member are fully considered, so that the method is closer to the actual working condition, and the fatigue strength and the service life of the structural member can be predicted more effectively. Among the many forms of defects that can occur, impact defects are particularly common, and the major scenarios that occur include accidental collisions during machining operations, accidental dropping of tools during maintenance, etc., which often result in impact-simulating impact pit defects on the part surface. The presence of the impact-simulated impact pit defect not only alters the geometry of the part surface, but, more importantly, it can induce complex stress state changes in localized areas of the defect. Specifically, impact simulated impact pit defects can cause localized residual stress and, due to abrupt changes in geometry, create stress concentration effects around the simulated impact pit. When the structural member bears fatigue load, the local high stress field and the residual stress field which are caused by the stress concentration effect are mutually overlapped, so that the local stress state of the simulated impact pit is determined together, and further, a key control effect is generated on the fatigue life of the material. Therefore, how to perform the appropriate quantification of the impact simulation impact pit becomes a problem to be solved. Disclosure of Invention In view of the above, the present invention provides a method, apparatus, electronic device and storage medium for quantifying an impact pit, so as to solve the problem of quantifying the impact pit. In a first aspect, the present invention provides a method of impact pit equivalence, the method comprising: Acquiring initial size information of a plurality of simulated impact pits generated by impacting a target object, wherein the initial size information comprises initial depth and initial radius; obtaining the maximum stress value corresponding to each simulated impact pit; And generating a target equivalent relation corresponding to the impact simulation impact pit according to the relation between the initial depth and the initial radius and the maximum stress values. The impact pit quantification method provided by the embodiment of the application obtains initial size information of a plurality of simulated impact pits generated by impacting a target object, obtains maximum stress values corresponding to the simulated impact pits, generates a target equivalent relationship corresponding to the impact simulated impact pits according to the relationship between the initial depth and the initial radius and the maximum stress values, and ensures the accuracy of the generated target equivalent relationship. And further realizing the equivalent quantification of the impact simulation impact pit. Therefore, the quantitative relation of the size and the stress characteristics between the non-standard impact simulation impact pit defect and the standard impact simulation impact pit defect can be established according to the target equivalent relation. In the defect tolerance design, the complex and various impact simulation impact pit defects can be unified to standard sizes for research and analysis, so that the research process is simplified, and the efficiency is improved. In an alternative embodiment, obtaining initial size information of a plurality of simulated impact pits generated for impact against a target object includes: acquiring a target material corresponding to a target object; determining a material dynamic deformation constitutive parameter corresponding to the target material according to the target material; According to the dynamic deformation constitutive