Mechanism motion fatigue reliability platform construction method

Abstract

The invention belongs to the field of structural strength analysis, and particularly relates to a mechanism motion fatigue reliability platform construction method. The method comprises the following steps: S1, constructing a database; s2, constructing a key part and failure mode module based on the database; s3, constructing a moving part modeling module based on the database; s4, constructing a moving part stress total spectrum module according to a simulation analysis result of the moving part modeling module; s5, constructing a sensitivity analysis module according to the total stress spectrum of the moving part; s6, constructing a fatigue test evaluation module based on the database; s7, constructing a fatigue life analysis module based on the database and the total stress spectrum of the moving part; and S8, constructing a life evaluation module based on a fatigue test evaluation result and a fatigue life analysis result. According to the mechanism motion fatigue reliability platform construction method, an integrated design analysis framework is provided, and a method and means are provided for durability design of aircraft motion parts and construction of an analysis platform.

Description

Technical Field

[0001] This application belongs to the field of structural strength analysis, and specifically relates to a method for constructing a mechanism motion fatigue reliability platform. Background Technology

[0002] With the increasing use of special structures such as moving parts in aircraft, their performance requirements are constantly improving, and the load environment they bear is becoming more complex. There are many types of moving parts in aircraft, including flaps, slats, ailerons, control surfaces, cabin doors, folding wings, and fairings. These moving parts are key parts that frequently experience failures during use and maintenance under complex motion, mechanics, and environmental conditions.

[0003] In order to accurately reflect the load characteristics and actual field usage, and to gradually realize the transformation from passive troubleshooting in the field to positive design based on fatigue reliability, thereby improving the reliability of moving parts in the field and reducing the failure rate, a method for constructing a mechanism motion fatigue reliability platform is proposed, and the modular construction and research of the platform are carried out.

[0004] Therefore, there is an urgent need for a technical solution to overcome or mitigate at least one of the aforementioned defects in the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide a method for constructing a mechanical motion fatigue reliability platform to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] A method for constructing a mechanism motion fatigue reliability platform includes:

[0008] Step S1: Construct a database to support fatigue reliability analysis of moving parts;

[0009] Step S2: Construct a critical component and failure mode module based on the database. The critical component and failure mode module is used to determine the critical fatigue components and failure modes.

[0010] Step S3: Construct a motion component modeling module based on the database. The motion component modeling module is used for motion component modeling and simulation.

[0011] Step S4: Construct a stress spectrum module for moving parts based on the simulation analysis results of the moving parts modeling module. The stress spectrum module for moving parts is used to compile the stress spectrum of moving parts.

[0012] Step S5: Construct a sensitivity analysis module based on the total stress spectrum of the moving parts. The sensitivity analysis module is used for reliability analysis.

[0013] Step S6: Construct a fatigue test evaluation module based on the database. The fatigue test evaluation module is used for fatigue test evaluation.

[0014] Step S7: Construct a fatigue life analysis module based on the database and the stress spectrum of moving parts. The fatigue life analysis module is used for fatigue life analysis.

[0015] Step S8: Construct a life assessment module based on the fatigue test evaluation results and fatigue life analysis results. The life assessment module is used to realize life assessment.

[0016] In at least one embodiment of this application, in step S1, the moving parts include ailerons, flaps, folding wings, and moving parts of elevators / rudders.

[0017] In at least one embodiment of this application, in step S1, the database includes a load environment database, a material database, a motion function database, a fault database, and a fatigue test database.

[0018] In at least one embodiment of this application, in step S2, a module for identifying key components and failure modes is constructed based on a fault database.

[0019] In at least one embodiment of this application, in step S3, a motion component modeling module is constructed based on a load environment database and a motion function database.

[0020] In at least one embodiment of this application, the motion part modeling module includes:

[0021] Finite element model elements are used to obtain conventional stress spectra through finite element analysis.

[0022] The rigid-flexible coupling motion simulation unit is used to obtain the stress spectrum of the motion process through rigid-flexible coupling motion simulation.

[0023] In at least one embodiment of this application, in step S4, the moving part stress spectrum module is used to compile the moving part stress spectrum based on the conventional stress spectrum and the stress spectrum during the motion process.

[0024] In at least one embodiment of this application, in step S5, the reliability analysis includes fatigue reliability analysis, corrosion fatigue reliability analysis, and wear reliability analysis.

[0025] In at least one embodiment of this application, in step S6, a fatigue test evaluation module is constructed based on a fatigue test database.

[0026] In at least one embodiment of this application, in step S7, a fatigue life analysis module is constructed based on a material database and the stress spectrum of moving parts.

[0027] The invention has at least the following beneficial technical effects:

[0028] The proposed method for constructing a mechanical motion fatigue reliability platform integrates a design and analysis framework that combines rigid-flexible coupling motion simulation, motion spectrum and conventional spectrum combination, fatigue reliability / sensitivity analysis, and test data reliability assessment. This provides methods and means for constructing a durability design and analysis platform for aircraft moving parts. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a mechanism motion fatigue reliability platform according to one embodiment of this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0032] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0033] This application provides a method for constructing a mechanical motion fatigue reliability platform, including the following steps:

[0034] Step S1: Construct a database to support fatigue reliability analysis of moving parts;

[0035] Step S2: Construct a critical component and failure mode module based on the database. The critical component and failure mode module is used to determine the critical fatigue components and failure modes.

[0036] Step S3: Construct a motion component modeling module based on the database. The motion component modeling module is used for motion component modeling and simulation.

[0037] Step S4: Construct a stress spectrum module for moving parts based on the simulation analysis results of the moving parts modeling module. The stress spectrum module for moving parts is used to compile the stress spectrum of moving parts.

[0038] Step S5: Construct a sensitivity analysis module based on the total stress spectrum of the moving parts. The sensitivity analysis module is used for reliability analysis.

[0039] Step S6: Construct a fatigue test evaluation module based on the database. The fatigue test evaluation module is used for fatigue test evaluation.

[0040] Step S7: Construct a fatigue life analysis module based on the database and the stress spectrum of moving parts. The fatigue life analysis module is used for fatigue life analysis.

[0041] Step S8: Construct a life assessment module based on the fatigue test evaluation results and fatigue life analysis results. The life assessment module is used to realize life assessment.

[0042] Specifically, such as Figure 1 As shown, in step S1, the moving parts include the moving parts of flaps, flaps, folding wings, elevators / rudders, and the database includes load environment database, material database, motion function database, fault database, and fatigue test database.

[0043] In step S2, a module for identifying key components and failure modes is constructed based on the fault database.

[0044] The critical components and failure modes module includes:

[0045] The critical component identification unit is used to identify fatigue critical components, corrosion fatigue critical components, and wear critical components based on fault data.

[0046] The failure mode determination unit is used to determine the failure mode based on the fault data and the key fatigue components. The failure modes include fatigue failure, corrosion fatigue failure, and wear failure.

[0047] In step S3, a motion component modeling module is constructed based on the load environment database and motion function database.

[0048] In a preferred embodiment of this application, the moving part modeling module includes:

[0049] Finite element model elements are used to obtain conventional stress spectra through finite element analysis.

[0050] The rigid-flexible coupling motion simulation unit is used to obtain the stress spectrum of the motion process through rigid-flexible coupling motion simulation.

[0051] In step S4, the stress spectrum module for moving parts is used to compile the stress spectrum for moving parts based on the conventional stress spectrum and the stress spectrum during the motion process.

[0052] In step S5, the reliability analysis of the sensitivity analysis module includes fatigue reliability analysis, corrosion fatigue reliability analysis, and wear reliability analysis.

[0053] In step S6, a fatigue test evaluation module is constructed based on the fatigue test database.

[0054] Fatigue testing includes fatigue testing, corrosion fatigue testing, and fatigue reliability testing.

[0055] In step S7, a fatigue life analysis module is constructed based on the material database and the stress spectrum of moving parts. This module can perform fatigue life analysis considering corrosion and wear factors.

[0056] In step S8, the life assessment module can assess fatigue reliability life, corrosion fatigue reliability life, and wear fatigue reliability life.

[0057] The proposed method for constructing a mechanism motion fatigue reliability platform comprises modular components that form an integrated design and analysis framework for mechanism motion fatigue reliability. Taking aircraft moving parts as the research object, the method first establishes a database suitable for fatigue reliability analysis of moving parts; then, it constructs modules for key components and failure modes; next, it compiles load spectra using a load environment database while simultaneously performing moving part modeling analysis; it combines the two stress spectra obtained from the modeling analysis to form a total stress spectrum; it constructs a sensitivity analysis module for fatigue reliability / sensitivity analysis; and finally, it combines the established fatigue test database to construct fatigue and corrosion fatigue reliability assessment modules, completing the life assessment of moving parts.

[0058] The proposed method for constructing a mechanism motion fatigue reliability platform systematically provides a design and analysis framework that integrates rigid-flexible coupling motion simulation, motion spectrum and conventional spectrum combination, fatigue reliability / sensitivity analysis, and experimental data reliability assessment. This improves the efficiency of building a fatigue reliability analysis platform for aircraft moving parts and can be used for fatigue reliability analysis of aircraft moving parts. It is particularly suitable for constructing an integrated design and analysis software framework for mechanism structure motion, fatigue, and reliability.

[0059] The method for constructing a motion fatigue reliability platform presented in this application, along with the resulting durability design methods, processes, and standards for moving parts, can be widely applied to the fatigue reliability analysis and experimental design of moving parts in newly developed aircraft. It provides a reference for the future construction of motion component fatigue reliability analysis platforms and possesses a certain degree of versatility and engineering applicability.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for constructing a mechanism motion fatigue reliability platform, characterized in that, include: Step S1: Construct a database to support fatigue reliability analysis of moving parts; Step S2: Construct a critical component and failure mode module based on the database. The critical component and failure mode module is used to determine the critical fatigue components and failure modes. Step S3: Construct a motion component modeling module based on the database for motion component modeling and simulation; Step S4: Construct a stress spectrum module for moving parts based on the simulation analysis results of the moving parts modeling module. The stress spectrum module for moving parts is used to compile the stress spectrum of moving parts. Step S5: Construct a sensitivity analysis module based on the total stress spectrum of the moving parts. The sensitivity analysis module is used for reliability analysis. Step S6: Construct a fatigue test evaluation module based on the database. The fatigue test evaluation module is used for fatigue test evaluation. Step S7: Construct a fatigue life analysis module based on the database and the stress spectrum of moving parts. The fatigue life analysis module is used for fatigue life analysis. Step S8: Construct a life assessment module based on the fatigue test evaluation results and fatigue life analysis results. The life assessment module is used to realize life assessment.

2. The method for constructing a mechanism motion fatigue reliability platform according to claim 1, characterized in that, In step S1, the moving parts include the moving parts of the flaps, flaps, folding wings, elevators / rudders.

3. The method for constructing a mechanism motion fatigue reliability platform according to claim 2, characterized in that, In step S1, the database includes a load environment database, a material database, a motion function database, a fault database, and a fatigue test database.

4. The method for constructing a mechanism motion fatigue reliability platform according to claim 3, characterized in that, In step S2, a module for identifying key components and failure modes is constructed based on the fault database.

5. The method for constructing a mechanism motion fatigue reliability platform according to claim 4, characterized in that, In step S3, a motion component modeling module is constructed based on the load environment database and the motion function database.

6. The method for constructing a mechanism motion fatigue reliability platform according to claim 5, characterized in that, The moving parts modeling module includes: Finite element model elements are used to obtain conventional stress spectra through finite element analysis. The rigid-flexible coupling motion simulation unit is used to obtain the stress spectrum of the motion process through rigid-flexible coupling motion simulation.

7. The method for constructing a mechanism motion fatigue reliability platform according to claim 6, characterized in that, In step S4, the stress spectrum module for moving parts is used to compile the stress spectrum for moving parts based on the conventional stress spectrum and the stress spectrum during the motion process.

8. The method for constructing a mechanism motion fatigue reliability platform according to claim 7, characterized in that, In step S5, the reliability analysis includes fatigue reliability analysis, corrosion fatigue reliability analysis, and wear reliability analysis.

9. The method for constructing a mechanism motion fatigue reliability platform according to claim 8, characterized in that, In step S6, a fatigue test evaluation module is constructed based on the fatigue test database.

10. The method for constructing a mechanism motion fatigue reliability platform according to claim 9, characterized in that, In step S7, a fatigue life analysis module is constructed based on the material database and the stress spectrum of moving parts.

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