Design method and device of feature simulation part for installation joint reliability analysis test

Abstract

The invention provides a feature simulation piece design method and device for an installation joint reliability analysis test, and the method comprises the steps: building a finite element analysis model of an installation joint structure in a thrust augmentation cylinder of an aero-engine, and obtaining a first calculation result; determining the stress distribution condition of the dangerous part; establishing a reliability analysis and sensitivity analysis model, and analyzing and screening out a key size; keeping the key size in a to-be-designed feature simulation piece according to the real size, determining the geometric form of the feature simulation piece, establishing a geometric model and a finite element calculation model of the feature simulation piece, and analyzing and calculating to obtain a second calculation result; and adjusting the geometric model of the size change feature simulation piece. According to the characteristic simulation piece designed through the method, the characteristics such as real stress and stress concentration coefficients can be well simulated, the influence of geometric uncertainty on the fatigue life can be considered, the analysis result and the test result can be compared, and then reliability analysis test verification of dangerous parts can be achieved.

Description

Technical Field

[0001] The present application relates to the field of aero-engine technology, and in particular to a method and device for designing a characteristic simulation component for a reliability analysis test of an installation section. Background Art

[0002] To address fatigue issues in critical aircraft engine components, due to the complex loading conditions and prohibitive costs of large-scale production testing, characteristic simulations are often designed to conduct fatigue testing. For example, Sun Qianyang, Zhang Peiwei, and others designed a perforated round bar characteristic simulation for the eccentric holes and tongue-and-groove structures of aircraft engine discs. Zhao Miaodong, Hu Dianyin, and others designed a tooth-shaped fatigue simulation for disc teeth. These approaches largely rely on the principles of geometric similarity and identical or similar processing techniques to design characteristic simulations to simulate stress, strain distribution, maximum stress gradient, and stress concentration factor characteristics in local critical areas. The assumption is that if these characteristics are consistent with the real-world conditions, the principle of life equivalence can be achieved. The simulations designed in these designs are mostly in the form of holes and slots, with relatively simple geometric configurations. They only simulate the stress and strain distribution in the local critical area, focusing primarily on the accuracy of the simulation of the real-world load conditions, without considering the impact of geometric dimensions on fatigue life.

[0003] However, during component manufacturing, geometrical dimensions inevitably vary due to factors such as machining errors. This variation can significantly impact the stress and strain distribution of the structure, and thus its fatigue life. Therefore, the aforementioned simulation component design method fails to consider the impact of geometrical uncertainty on fatigue life and cannot be used for reliability analysis and testing. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the first purpose of this application is to propose a characteristic simulation component design method for installation node reliability analysis test.

[0006] The second object of this application is to provide a device.

[0007] The third objective of this application is to provide an electronic device.

[0008] The fourth object of this application is to provide a computer-readable storage medium.

[0009] A fifth object of this application is to provide a computer program product.

[0010] To achieve the above objectives, the first embodiment of the present application proposes a method for designing a characteristic simulation component for a reliability analysis test of an installation node, comprising:

[0011] Establish a finite element analysis model of the mounting section structure in the afterburner cylinder of an aircraft engine and conduct static strength calculations to obtain the first calculation results;

[0012] determining a dangerous part and a stress distribution condition of the dangerous part according to the first calculation result;

[0013] Based on the fatigue life model and failure mode of the afterburner cylinder installation section, a reliability analysis and sensitivity analysis model was established. Reliability and sensitivity analysis were then performed, and the key dimensions that affect fatigue life were screened based on the analysis results.

[0014] Retaining the critical dimensions in the feature simulation to be designed according to the actual dimensions, determining the geometric form of the feature simulation according to the simulation design criteria, and establishing a geometric model of the feature simulation;

[0015] Determine the load and boundary conditions of the characteristic simulation component and establish a finite element calculation model of the characteristic simulation component, and perform static strength analysis calculation of the characteristic simulation component under uniaxial tension boundary conditions to obtain a second calculation result;

[0016] The geometric model of the feature simulation part is changed by adjusting other dimensions except the critical dimension according to the first calculation result and the second calculation result, so that the difference between the first calculation result and the second calculation result is within an allowable range.

[0017] Optionally, determining the dangerous part and the stress distribution of the dangerous part according to the first calculation result includes:

[0018] Select an optimal path along the gradient direction of the stress cloud map, and extract data on stress variation with distance along the optimal path;

[0019] The data on the stress variation with distance are normalized to serve as the design target of the stress gradient and stress distribution of the characteristic simulation part.

[0020] Optionally, a reliability analysis and sensitivity analysis model is established based on the fatigue life model and failure mode of the afterburner cylinder installation section, and reliability and sensitivity analysis are performed. Based on the analysis results, key dimensions that affect fatigue life are screened out, including:

[0021] Determine the functional function and failure mode of the real part, establish the reliability analysis and sensitivity analysis model of the real part, and perform reliability analysis and sensitivity analysis to obtain the global sensitivity of failure probability and variance corresponding to different sizes;

[0022] The global sensitivity of failure probability and global sensitivity of variance corresponding to each size are fused to obtain the comprehensive sensitivity;

[0023] Determining a dimension whose comprehensive sensitivity is higher than a preset threshold as the critical dimension;

[0024] In addition to key dimensions, adjust other adjustable geometric dimensions.

[0025] Optionally, retaining the critical dimensions in the feature simulation to be designed according to the actual dimensions and determining the geometric form of the feature simulation according to the simulation design criteria, and establishing the geometric model of the feature simulation includes:

[0026] When designing a simulation part, the key dimensions are retained in the feature part according to the actual size, and a geometric model of the feature simulation part is preliminarily established based on the principles of stress equivalence, geometric similarity, etc.

[0027] Optionally, adjusting the geometric model of the characteristic simulation component according to the difference between the first calculation result and the second calculation result includes:

[0028] determining the stress distribution of the dangerous part according to the second calculation result;

[0029] According to the stress distribution of the first calculation result and the stress distribution of the second calculation result, the load condition of the characteristic simulation part is adjusted by adjusting the geometric dimensions except the key dimensions, so that the stress distribution of the designed characteristic simulation part is consistent with the design target.

[0030] Optionally, adjusting the load condition of the characteristic simulation component includes:

[0031] Adjusting the load size in the finite element calculation model of the characteristic simulation part to adjust the maximum stress value of the static strength calculation of the characteristic simulation part;

[0032] When the stress values ​​of the first calculation result and the stress values ​​of the second calculation result tend to be consistent, the load adjustment is stopped and the corresponding load magnitude is output.

[0033] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a characteristic simulation component design device for installation node reliability analysis test, comprising:

[0034] The first calculation module is used to establish a finite element analysis model of the mounting section structure in the afterburner cylinder of the aircraft engine and perform static strength calculation to obtain a first calculation result;

[0035] A stress analysis module, configured to determine a dangerous part and a stress distribution condition of the dangerous part according to the first calculation result;

[0036] The key dimension determination module is used to establish the reliability analysis and sensitivity analysis model of the afterburner cylinder installation section based on its fatigue life model and failure mode, and to perform reliability and sensitivity analysis. Based on the analysis results, the key dimensions that affect fatigue life are screened out.

[0037] A model building module is used to retain the key dimensions in the feature simulation part to be designed according to the actual size and determine the geometric form of the feature simulation part according to the simulation part design criteria, and establish a geometric model of the feature simulation part;

[0038] The second calculation module is used to determine the load and boundary conditions of the characteristic simulation part and establish a finite element calculation model of the characteristic simulation part, and perform static strength analysis calculation of the characteristic simulation part under uniaxial tension boundary conditions to obtain a second calculation result;

[0039] The model adjustment module is used to change the geometric model of the feature simulation part by adjusting other dimensions except the critical dimension according to the first calculation result and the second calculation result, so that the difference between the first calculation result and the second calculation result is within an allowable range.

[0040] To achieve the above-mentioned purpose, a third embodiment of the present application provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0041] The memory stores computer-executable instructions;

[0042] The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first aspects.

[0043] To achieve the above-mentioned purpose, the fourth embodiment of the present application proposes a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, they are used to implement the method as described in any one of the first aspects.

[0044] To achieve the above-mentioned objectives, the fifth embodiment of the present application proposes a computer program product, which implements any one of the methods in the first aspect when executed by a processor.

[0045] The design method, device, electronic equipment and storage medium of characteristic simulation parts for installation node reliability analysis test provided in this application, through the finite element calculation model, enable the designed characteristic simulation parts to not only better simulate the actual stress and strain distribution, stress concentration factor and other characteristics, but also consider the influence of geometric uncertainty on fatigue life, thereby realizing the reliability analysis test verification of dangerous components.

[0046] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0048] Figure 1 A flow chart of a method for designing a characteristic simulation component for a reliability analysis test of an installation section provided in an embodiment of the present application;

[0049] Figure 2 This is the local equivalent stress cloud diagram of the afterburner cylinder installation section;

[0050] Figure 3 Select a schematic diagram for the installation node along the stress gradient path;

[0051] Figure 4 Schematic diagram of global sensitivity analysis results based on failure probability;

[0052] Figure 5 Schematic diagram of the global sensitivity analysis results based on variance;

[0053] Figure 6 This is a schematic diagram of the key dimensions of the installation section;

[0054] Figure 7 To install the feature simulation parts of the section;

[0055] Figure 8 The stress distribution cloud diagram of the characteristic simulation parts of the afterburner cylinder installation section;

[0056] Figure 9 Select a schematic diagram along the stress gradient path for the installation node feature simulation part;

[0057] Figure 10 The stress curve comparison diagram of the characteristic simulation part and the installation section;

[0058] Figure 11 This is a structural schematic diagram of a characteristic simulation component design device for installation node reliability analysis test provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0060] To address fatigue issues in critical aircraft engine components, due to the complex loading conditions and prohibitive costs of large-scale production testing, characteristic simulations are often designed to conduct fatigue testing. For example, Sun Qianyang, Zhang Peiwei, and others designed a perforated round bar characteristic simulation for the eccentric holes and tongue-and-groove structures of aircraft engine discs. Zhao Miaodong, Hu Dianyin, and others designed a tooth-shaped fatigue simulation for disc teeth. These approaches largely rely on the principles of geometric similarity and identical or similar processing techniques to design characteristic simulations to simulate stress, strain distribution, maximum stress gradient, and stress concentration factor characteristics in local critical areas. The assumption is that if these characteristics are consistent with the real-world conditions, the principle of life equivalence can be achieved. The simulations designed in these designs are mostly in the form of holes and slots, with relatively simple geometric configurations. They only simulate the stress and strain distribution in the local critical area, focusing primarily on the accuracy of the simulation of the real-world load conditions, without considering the impact of geometric dimensions on fatigue life. However, during component manufacturing, geometrical dimensions inevitably vary due to factors such as machining errors. This variation can significantly impact the stress and strain distribution of the structure, and thus its fatigue life. Therefore, the aforementioned simulation component design method fails to consider the impact of geometrical uncertainty on fatigue life and cannot be used for reliability analysis and testing.

[0061] For aircraft engine components to better meet actual operational requirements, in-depth fatigue research is needed. However, due to cost constraints, most fatigue research relies on the design of simulated parts. Therefore, a method for designing characteristic simulated parts that can be verified through fatigue reliability testing is needed.

[0062] The embodiment of the present application provides a method for designing a characteristic simulation component for a reliability analysis test of an installation node. Figure 1 This is a flow chart of a method for designing a characteristic simulation component for a reliability analysis test of an installation section provided in an embodiment of the present application. Figure 1 As shown, the method includes the following steps:

[0063] Step 101: Establish a finite element analysis model of the mounting section structure in the afterburner cylinder of an aircraft engine, and perform a static strength calculation to obtain a first calculation result;

[0064] Step 102: determining a dangerous part and a stress distribution condition of the dangerous part according to the first calculation result;

[0065] Step 103: Establish a reliability analysis and sensitivity analysis model based on the fatigue life model and failure mode of the afterburner cylinder installation section, perform reliability and sensitivity analysis, and select key dimensions that have an impact on fatigue life based on the analysis results.

[0066] Step 104: retain the critical dimensions in the feature simulation to be designed according to the actual dimensions, determine the geometric form of the feature simulation according to the simulation design criteria, and establish a geometric model of the feature simulation;

[0067] Step 105 , determining the load and boundary conditions of the characteristic simulation component and establishing a finite element calculation model of the characteristic simulation component, and performing a static strength analysis calculation of the characteristic simulation component under uniaxial tension boundary conditions to obtain a second calculation result;

[0068] Step 106 : Changing the geometric model of the feature simulation component by adjusting other dimensions except the critical dimension according to the first calculation result and the second calculation result, so that the difference between the first calculation result and the second calculation result is within an allowable range.

[0069] This paper proposes a method for designing characteristic simulation components for reliability analysis and testing of afterburner cylinder mounting sections. This simulation retains the geometric dimensions of the actual structure that have a significant impact on fatigue life, identified through global sensitivity screening. Compared to previous simulation design methods, this method provides a more realistic simulation of geometric features. Furthermore, processing and testing the characteristic simulation components designed using this method facilitates the measurement and statistical analysis of the probability distribution characteristics of key geometric dimensions, thereby better supporting and verifying the reliability analysis method.

[0070] Optionally, the step 102 of determining the dangerous part and the stress distribution of the dangerous part according to the first calculation result includes:

[0071] Select an optimal path along the gradient direction of the stress cloud map, and extract data on stress variation with distance along the optimal path;

[0072] The data on the stress variation with distance are normalized to serve as the design target of the stress gradient and stress distribution of the characteristic simulation part.

[0073] Optionally, in step 103, a reliability analysis and sensitivity analysis model is established based on the fatigue life model and failure mode of the afterburner cylinder mounting section, and reliability and sensitivity analysis are performed. Based on the analysis results, key dimensions that affect fatigue life are screened out, including:

[0074] Determine the functional function and failure mode of the real part, establish the reliability analysis and sensitivity analysis model of the real part, and perform reliability analysis and sensitivity analysis to obtain the global sensitivity of failure probability and variance corresponding to different sizes;

[0075] The global sensitivity of failure probability and variance corresponding to each size is fused to obtain the comprehensive sensitivity;

[0076] Determining a dimension whose comprehensive sensitivity is higher than a preset threshold as the critical dimension;

[0077] In addition to key dimensions, adjust other adjustable geometric dimensions.

[0078] Figure 4 Schematic diagram of global sensitivity analysis results based on failure probability. Figure 5 Schematic diagram of the results of global sensitivity analysis based on variance.

[0079] like Figure 4 As shown in Figure 1, global sensitivity analysis is a statistical method used to assess the sensitivity of model output to changes in various input parameters. In this figure, the horizontal axis represents different uncertain variables, and the vertical axis represents the sensitivity of these variables to the failure probability.

[0080] As can be seen from the figure:

[0081] Dimension "a" has the highest sensitivity, with its histogram height close to 0.20, meaning that this variable has the greatest impact on the probability of failure.

[0082] Dimension "r4" also shows a higher sensitivity, with the height of the histogram being approximately 0.06.

[0083] The sensitivities of other sizes such as "w1", "h1", "r1", "r2", "r3", "r5", "r6", "r7", "r8", "w2", "h2", as well as "F1" and "F2" are relatively low, and the heights of the histograms are all below 0.04.

[0084] Size "E" has the lowest sensitivity, almost close to 0.

[0085] like Figure 5 As shown in Figure 2, global sensitivity analysis is used to evaluate the contribution of model output to the variance, that is, which input parameter changes have the greatest impact on the uncertainty of the output results.

[0086] As can be seen from the figure: dimension "a" has the highest variance sensitivity, and the height of its histogram is significantly higher than that of other variables, indicating that this dimension has the greatest impact on the variance.

[0087] Size "r4" also shows a higher sensitivity to variance, with the height of the histogram being the second highest.

[0088] The variance sensitivities of other dimensions such as "w1", "h1", "r1", "r2", "r3", "r5", "r6", "r7", "r8", "w2", "h2", as well as "F1" and "F2" are relatively low, and the heights of the histograms are all below 0.04.

[0089] Dimension "E" has the lowest variance sensitivity, almost close to 0.

[0090] In a possible embodiment, the failure probability global sensitivity and the variance global sensitivity are weighted and summed to obtain the comprehensive sensitivity.

[0091] Optionally, the weights of the failure probability global sensitivity and the variance global sensitivity are both 1.

[0092] It can be seen from the results of the two global sensitivity analyses that the influence of most uncertain factors on the response of the afterburner cylinder is relatively small. Combining the results of the two global sensitivity analyses, the four geometric dimensions of the right rib width w1, right rib height h1, transition section r2, and transition section r4 are finally considered as the critical dimensions, and these dimensions are retained when designing the characteristic simulation parts.

[0093] Optionally, the step of retaining the critical dimensions in the feature simulation to be designed according to the actual dimensions and determining the geometric form of the feature simulation according to simulation design criteria, and establishing the geometric model of the feature simulation includes:

[0094] When designing a simulation part, the key dimensions are retained in the feature part according to the actual size, and a geometric model of the feature simulation part is preliminarily established based on the principles of stress equivalence, geometric similarity, etc.

[0095] Optionally, the step 106 of adjusting the geometric model of the characteristic simulation component according to the difference between the first calculation result and the second calculation result includes:

[0096] determining the stress distribution of the dangerous part according to the second calculation result;

[0097] According to the stress distribution of the first calculation result and the stress distribution of the second calculation result, the load condition of the characteristic simulation part is adjusted by adjusting the geometric dimensions except the key dimensions, so that the stress distribution of the designed characteristic simulation part is consistent with the design target.

[0098] Optionally, adjusting the load condition of the characteristic simulation component includes:

[0099] Adjusting the load size in the finite element calculation model of the characteristic simulation part to adjust the maximum stress value of the static strength calculation of the characteristic simulation part;

[0100] When the stress values ​​of the first calculation result and the stress values ​​of the second calculation result tend to be consistent, the load adjustment is stopped and the corresponding load magnitude is output.

[0101] Taking the afterburner cylinder model as an example, the characteristic simulation component design method proposed above is used to design characteristic simulation components for the installation section of the dangerous part of the model. The relevant content and design process are detailed as follows:

[0102] Step 1: Establish a finite element calculation model of the afterburner cylinder and carry out static strength calculation.

[0103] Step 2: Based on the finite element static strength calculation results, determine the dangerous parts of the afterburner and the stress distribution in these parts, cut the stress concentration parts, select an optimal path along the gradient direction of the stress cloud map, extract the data of stress variation with distance on this path, and perform normalization processing as the design target of stress gradient and stress distribution of characteristic simulation parts.

[0104] According to the static strength calculation results of the afterburner cylinder, the stress distribution, maximum value and path selection of the installation section are as follows: Figure 2 、 Figure 3 shown. Figure 2 This is the local equivalent stress cloud diagram of the afterburner cylinder installation section. Figure 3 Select a schematic diagram for the mounting node along the stress gradient path.

[0105] Step 3: Determine the geometric form of the characteristic simulation part. When designing the characteristic simulation part, keep the screened rib height, rib width, arc radius and other dimensions consistent with the actual dimensions of the installation section, and preliminarily establish the geometric model of the characteristic simulation part.

[0106] Figure 6 This is a schematic diagram of the key dimensions of the installation section. Figure 6 In the middle, 1 is the height of the installation section rib, 2 is the width of the installation section rib, and 3 and 4 are the two arc surface radii.

[0107] Figure 7 It is a simulation part of the installation section feature, where 1' is the simulation part rib height, 2' is the simulation part rib width, and 3' and 4' are two arc surface radii.

[0108] Step 4: Determine the load and boundary conditions of the characteristic simulation parts of the installation section, establish a finite element analysis model of the characteristic simulation parts of the installation section, and carry out static strength analysis and calculation of the characteristic simulation parts under uniaxial tension boundary conditions.

[0109] Figure 8 This is the stress distribution cloud diagram of the characteristic simulation parts of the afterburner cylinder installation section. Figure 9 Select a schematic diagram along the stress gradient path for the mounting node feature simulation.

[0110] Step 5: Compare the finite element calculation results of the characteristic simulation part and the installation section, assess the stress distribution of the dangerous parts, adjust the geometric model of the characteristic simulation part in step 3, so that the stress distribution of the designed characteristic simulation part is consistent with the design target in step 2, and complete the design of the characteristic simulation part of the installation section.

[0111] Figure 10 To compare the stress curves of the characteristic simulation component and the installation section, adjust the relevant modeling control parameters involved in the geometric modeling in step 3 to adjust the stress distribution and gradient of the characteristic simulation component. Adjust the load magnitude in the finite element calculation model of the characteristic simulation component in step 4 to adjust the maximum stress value in the static strength calculation of the characteristic simulation component. When the design characteristics and target characteristic curves and distributions converge, the design of the afterburner cylinder installation section characteristic simulation component is complete.

[0112] In order to implement the above embodiment, the present application also proposes a characteristic simulation component design device for installation node reliability analysis test. Figure 11 This is a schematic diagram of the structure of a characteristic simulation component design device for installation node reliability analysis test provided in an embodiment of the present application. Figure 11 As shown, the device includes:

[0113] A first calculation module 910 is used to establish a finite element analysis model of the mounting section structure in the afterburner cylinder of the aircraft engine and perform static strength calculation to obtain a first calculation result;

[0114] A stress analysis module 920 is configured to determine a dangerous part and a stress distribution of the dangerous part according to the first calculation result;

[0115] The key dimension determination module 930 is used to establish a reliability analysis and sensitivity analysis model based on the fatigue life model and failure mode of the afterburner cylinder installation section, perform reliability and sensitivity analysis, and screen out key dimensions that affect fatigue life based on the analysis results;

[0116] A model building module 940 is used to retain the key dimensions in the feature simulation to be designed according to the actual size and determine the geometric form of the feature simulation according to the simulation design criteria, and establish a geometric model of the feature simulation;

[0117] The second calculation module 950 is used to determine the load and boundary conditions of the characteristic simulation component and establish a finite element calculation model of the characteristic simulation component, and perform static strength analysis calculation of the characteristic simulation component under uniaxial tension boundary conditions to obtain a second calculation result;

[0118] The model adjustment module 960 is used to change the geometric model of the feature simulation part by adjusting other dimensions except the critical dimension according to the first calculation result and the second calculation result, so that the difference between the first calculation result and the second calculation result is within an allowable range.

[0119] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0120] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0121] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0122] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0123] It is important to note that personal information collected from users should be used for legitimate and reasonable purposes and should not be shared or sold beyond these legitimate uses. Furthermore, such collection / sharing should be conducted only after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization that includes the relevant user information before using the feature. Furthermore, any necessary steps must be taken to safeguard and secure access to such personal information and ensure that others with access to personal information comply with its privacy policy and procedures.

[0124] This application contemplates providing implementations that allow users to selectively block the use or access of personal information data. Specifically, this disclosure contemplates providing hardware and / or software to prevent or block access to such personal information data. Risks can be minimized by limiting data collection and deleting data once it is no longer needed. Furthermore, where applicable, such personal information can be de-identified to protect user privacy.

[0125] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0126] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0127] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0128] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0129] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0130] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0131] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0132] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for designing characteristic simulation parts for reliability analysis and test verification of installation nodes, characterized in that: The following steps are involved: Establish a finite element analysis model of the mounting section structure in the afterburner cylinder of an aircraft engine and conduct static strength calculations to obtain the first calculation results; determining a dangerous part and a stress distribution condition of the dangerous part according to the first calculation result; Based on the fatigue life model and failure mode of the afterburner cylinder installation section, a reliability analysis and sensitivity analysis model was established. Reliability and sensitivity analysis were then performed, and the key dimensions that affect fatigue life were screened based on the analysis results. Retaining the critical dimensions in the feature simulation to be designed according to the actual dimensions, determining the geometric form of the feature simulation according to the simulation design criteria, and establishing a geometric model of the feature simulation; Determine the load and boundary conditions of the characteristic simulation component and establish a finite element calculation model of the characteristic simulation component, and perform static strength analysis calculation of the characteristic simulation component under uniaxial tension boundary conditions to obtain a second calculation result; The geometric model of the feature simulation part is changed by adjusting other dimensions except the critical dimension according to the first calculation result and the second calculation result, so that the difference between the first calculation result and the second calculation result is within an allowable range.

2. The method according to claim 1, characterized in that The determining of the dangerous part and the stress distribution of the dangerous part according to the first calculation result includes: Select an optimal path along the gradient direction of the stress cloud map, and extract data on stress variation with distance along the optimal path; The data on the stress variation with distance are normalized to serve as the design target of the stress gradient and stress distribution of the characteristic simulation part.

3. The method according to claim 2, characterized in that According to the fatigue life model and failure mode of the afterburner cylinder installation section, a reliability analysis and sensitivity analysis model is established, and reliability and sensitivity analysis are performed. Based on the analysis results, key dimensions that affect fatigue life are screened out, including: Determine the functional function and failure mode of the real part, establish the reliability analysis and sensitivity analysis model of the real part, and perform reliability analysis and sensitivity analysis to obtain the global sensitivity of failure probability and variance corresponding to different sizes; The global sensitivity of failure probability and variance corresponding to each size is fused to obtain the comprehensive sensitivity; Determining a dimension whose comprehensive sensitivity is higher than a preset threshold as the critical dimension; In addition to key dimensions, adjust other adjustable geometric dimensions.

4. The method according to claim 3, characterized in that The step of retaining the critical dimensions in the feature simulation to be designed according to the actual dimensions and determining the geometric form of the feature simulation according to the simulation design criteria to establish the geometric model of the feature simulation includes: When designing a simulation part, the key dimensions are retained in the feature part according to the actual size, and a geometric model of the feature simulation part is preliminarily established based on the principles of stress equivalence, geometric similarity, etc.

5. The method according to claim 4, characterized in that The adjusting the geometric model of the characteristic simulation component according to the difference between the first calculation result and the second calculation result includes: determining the stress distribution of the dangerous part according to the second calculation result; According to the stress distribution of the first calculation result and the stress distribution of the second calculation result, the load condition of the characteristic simulation part is adjusted by adjusting the geometric dimensions except the key dimensions, so that the stress distribution of the designed characteristic simulation part is consistent with the design target.

6. The method according to claim 5, characterized in that The adjusting the load condition of the characteristic simulation component includes: Adjusting the load size in the finite element calculation model of the characteristic simulation part to adjust the maximum stress value of the static strength calculation of the characteristic simulation part; When the stress values ​​of the first calculation result and the stress values ​​of the second calculation result tend to be consistent, the load adjustment is stopped and the corresponding load magnitude is output.

7. A characteristic simulation component design device for installation node reliability analysis test, characterized in that: include: The first calculation module is used to establish a finite element analysis model of the mounting section structure in the afterburner cylinder of the aircraft engine and perform static strength calculation to obtain a first calculation result; A stress analysis module, configured to determine a dangerous part and a stress distribution of the dangerous part according to the first calculation result; The key dimension determination module is used to establish the reliability analysis and sensitivity analysis model of the afterburner cylinder installation section based on its fatigue life model and failure mode, and to perform reliability and sensitivity analysis. Based on the analysis results, the key dimensions that affect fatigue life are screened out. A model building module is used to retain the key dimensions in the feature simulation part to be designed according to the actual size and determine the geometric form of the feature simulation part according to the simulation part design criteria, and establish a geometric model of the feature simulation part; The second calculation module is used to determine the load and boundary conditions of the characteristic simulation part and establish a finite element calculation model of the characteristic simulation part, and perform static strength analysis calculation of the characteristic simulation part under uniaxial tension boundary conditions to obtain a second calculation result; The model adjustment module is used to change the geometric model of the feature simulation part by adjusting other dimensions except the critical dimension according to the first calculation result and the second calculation result, so that the difference between the first calculation result and the second calculation result is within an allowable range.

8. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 6 when the computer program is executed by a processor.

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