A method and system for designing a test disc for fatigue testing of rotating parts

Abstract

The present invention relates to the field of low-cycle fatigue testing of aeroengines, and discloses a method and system for designing a test disc under a fatigue test of a rotating part. The method establishes a basic model of the test disc, obtains the overall equivalent stress distribution of the basic model of the test disc by performing finite element analysis on the basic model of the test disc, and optimizes the basic model of the test disc to obtain a preliminary optimized model of the test disc. The optimization improves the strength reserve of the test disc under fatigue testing, and compares the stress value corresponding to the material property and the S-N curve with the target value of the assembly requirement, so that the test disc can achieve a better level under realistic simulation of actual working conditions, meet the test requirements, and accurately determine the fatigue life of the rotating part. At the same time, the optimization can enable the test disc to be recycled with the test equipment and the engine, thereby reducing the test cost.

Description

Technical Field

[0001] The present invention relates to the field of low cycle fatigue testing of aircraft engines, and in particular to a method and system for designing a test disc for a fatigue test of a rotating part. Background Art

[0002] Rotating parts like rotor discs, often critical components of aircraft engines, require low-cycle fatigue testing and destructive testing to determine or verify their service life. This is to prevent fatigue failure of these rotating parts under harsh operating conditions, potentially penetrating the casing and causing catastrophic accidents resulting in loss of life and aircraft. Furthermore, engine discs are relatively expensive, so carefully designed test discs can effectively reduce or avoid financial waste.

[0003] Engine discs are typically preloaded during assembly, and during operation, they are further impacted by high rotational speeds, temperature fluctuations, blade centrifugal forces, and gas impact loads. To closely simulate actual engine operating conditions and ensure the accuracy of test results, the rationality of the test disc design is crucial. Improper design can lead to insufficient strength reserves and a failure to accurately simulate actual operating conditions. This can lead to premature cracking, making fatigue life testing impossible, destructive testing impossible, or inaccurate test results, posing a risk to determining or assessing the lifespan of the engine disc.

[0004] Because engine high- and low-pressure rotors are typically multi-stage structures, conducting joint tests on multiple discs is expensive. Furthermore, the disc lifespans of each disc sometimes vary significantly, or the lifespans of each disc are unclear. If fatigue cracks or failure occur in a disc in a single stage during a blind joint test, the test will be terminated. This, on the one hand, results in greater economic losses, and on the other hand, fails to adequately assess the fatigue lifespans of each disc. Therefore, research was conducted on the design method of a rotating parts fatigue test device. Summary of the Invention

[0005] Aiming at the problems in the prior art that the test disc for rotating parts has insufficient strength reserve under fatigue test, cannot truly simulate actual working conditions and cannot be recycled, the present invention provides a method and system for designing a test disc for rotating parts fatigue test.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for designing a test plate for a fatigue test of a rotating part comprises the following steps:

[0008] Step 1: Determine the connection size of the test equipment and the actual engine parts size, and respectively establish the basic model of the test plate and the basic model of the actual engine working plate;

[0009] Step 2: 3D assemble the test disc and the actual engine working disc, apply test load parameters, and perform finite element analysis on the test disc basic model and the actual engine working disc basic model to obtain the overall equivalent stress and displacement distribution values ​​of the test disc basic model, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the test disc basic model;

[0010] Step 3, establishing a preliminary optimization model of the test disk based on the basic model of the test disk and the maximum equivalent stress position in the overall equivalent stress distribution of the basic model of the test disk;

[0011] Step 4: 3D assemble the preliminary optimized model of the test disk and the actual engine working disk, apply test load parameters, and perform finite element analysis on the preliminary optimized model of the test disk and the basic model of the actual engine working disk to obtain the overall equivalent stress and displacement distribution values ​​of the preliminary optimized model of the test disk, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disk under the test state of the preliminary optimized model of the test disk;

[0012] Step 5: Compare the maximum equivalent stress and displacement value in the overall equivalent stress distribution of the preliminary optimization model of the test disk, as well as the overall equivalent stress distribution and the maximum equivalent stress position and value of the working disk under the test parameters of the preliminary optimization model of the test disk with the test conditions. When the conditions are met, the design of the test disk under the fatigue test of the rotating part is completed.

[0013] Preferably, in step 1, in establishing the basic model of the test plate, the test plate substrate model adopts a solid structure.

[0014] Preferably, in step 2, the test load parameters include the actual working load, the test speed and the test temperature.

[0015] Preferably, in step 3, the process of establishing a preliminary optimization model based on the test plate is as follows:

[0016] S1, based on the basic model of the test disk and the position of the maximum equivalent stress, obtain several optimized parameters of the test disk;

[0017] S2, determining the variation range and median value of several test plate optimization parameters according to the initial size of the test plate basic model;

[0018] S3, analyzing the influence of several test disk optimization parameters and obtaining a graph showing the change of optimization parameters;

[0019] S4, determining the optimization parameters with significant influence according to the optimization parameter variation law diagram;

[0020] S5, analyzing the optimization parameters with significant influence to obtain the values ​​of the optimization parameters;

[0021] S6, establishing a preliminary optimization model for the test disk according to the values ​​of the optimization parameters.

[0022] Furthermore, the optimization parameters of the test disc include the vertical height V1 of the web trailing edge, the horizontal distance H2 between the outer side of the web trailing edge and the disc edge, the horizontal distance H3 of the web trailing edge, and the transition fillet radius R4 of the web trailing edge root.

[0023] Furthermore, according to the influence rules of several test disk optimization parameters, one of the test disk optimization parameters is changed within the variation range, while the other test disk optimization parameters remain unchanged and the median of the test disk optimization parameter variation range is taken. The same test load is applied, and the influence rules of each test disk optimization parameter are analyzed one by one through finite element analysis.

[0024] Preferably, in step 5, the test conditions are as follows:

[0025] When the maximum equivalent stress of the preliminary optimization model of the test disk is less than the material property stress value and the stress value corresponding to the SN curve, the achievable displacement value of the test disk is greater than the target value required by the assembly, and the overall equivalent stress distribution and maximum equivalent stress position of the working disk under the test parameters of the preliminary optimization model of the test disk are consistent with the overall equivalent stress distribution and maximum equivalent stress position of the working disk based on the actual working load parameters, and the maximum equivalent stress value meets the test load coefficient required by the standard, the design of the test disk under the fatigue test of rotating parts is completed.

[0026] Furthermore, a finite element analysis is performed on the actual engine working disk based on the actual working load parameters to obtain the overall equivalent stress distribution of the working disk and the position and value of the maximum equivalent stress; among which the actual working load parameters include assembly load, centrifugal load, temperature load and aerodynamic load.

[0027] A test plate design system for fatigue testing of rotating parts, including

[0028] The first model building module is used to determine the connection dimensions of the test equipment and the dimensions of the actual engine parts, and to respectively build a basic model of the accompanying test disc and a basic model of the actual engine working disc;

[0029] The first processing module is used to assemble the test disc and the actual engine working disc in three dimensions, apply test load parameters, and perform finite element analysis on the test disc basic model and the actual engine working disc basic model to obtain the overall equivalent stress and displacement distribution values ​​of the test disc basic model, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the test disc basic model;

[0030] The second processing module is used to establish a preliminary optimization model of the test disk based on the test disk basic model and the maximum equivalent stress position in the overall equivalent stress distribution of the test disk basic model;

[0031] The third processing module is used to perform three-dimensional assembly of the preliminary optimized model of the test disc and the actual engine working disc, apply test load parameters, and perform finite element analysis on the preliminary optimized model of the test disc and the basic model of the actual engine working disc to obtain the overall equivalent stress and displacement distribution values ​​of the preliminary optimized model of the test disc, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the preliminary optimized model of the test disc;

[0032] The comparison module is used to compare the maximum equivalent stress and displacement value in the overall equivalent stress distribution of the preliminary optimization model of the test disk, as well as the overall equivalent stress distribution and the maximum equivalent stress position and value of the working disk under the test parameters of the preliminary optimization model of the test disk with the test conditions. When the conditions are met, the design of the test disk under the fatigue test of the rotating part is completed.

[0033] Furthermore, the second processing module includes:

[0034] An acquisition module is used to obtain several optimized parameters of the test disk based on the basic model of the test disk and the maximum equivalent stress position;

[0035] The first determination module is used to determine the variation range and median value of several test plate optimization parameters according to the initial size of the test plate basic model;

[0036] The first analysis module is used to analyze the influence of several test disk optimization parameters and obtain the optimization parameter change law diagram;

[0037] The second determination module is used to determine the optimization parameters with significant influence according to the optimization parameter change regularity diagram;

[0038] The second analysis module is used to analyze the optimization parameters with significant influence and obtain the values ​​of the optimization parameters;

[0039] The second model building module is used to build a preliminary optimization model of the test plate according to the values ​​of the optimization parameters.

[0040] Compared with the prior art, the present invention has the following beneficial technical effects:

[0041] The present invention provides a method for designing a test disc for a fatigue test of a rotating part. The method establishes a basic model of the test disc, performs finite element analysis on the basic model of the test disc to obtain an overall equivalent stress distribution of the basic model of the test disc, and optimizes the basic model of the test disc to obtain a preliminary optimized model of the test disc. The optimization improves the strength reserve of the test disc under the fatigue test, and compares the stress value of the material property and the stress value corresponding to the SN curve with the target value of the assembly requirement. The test disc is then able to achieve a better level under realistically simulated actual working conditions, meet the test requirements, and accurately determine the fatigue life of the rotating part. The optimization also allows the test disc to be recycled with the test equipment and the engine, reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a flow chart of the method for designing a test plate for a fatigue test of a rotating part in the present invention;

[0043] Figure 2 It is the basic model of the test plate in the present invention;

[0044] Figure 3 This is a schematic diagram of the optimization parameters of the test plate in the present invention;

[0045] Figure 4 This is a graph showing the variation of the vertical height of the web trailing edge as a variable in the present invention;

[0046] Figure 5 This is a graph showing the variation of the horizontal distance between the outer side of the web rear edge and the disk edge as a variable in the present invention;

[0047] Figure 6 This is a graph showing the variation of the horizontal distance of the web trailing edge as a variable in the present invention;

[0048] Figure 7 This is a graph showing the variation of the transition fillet radius at the root of the web trailing edge as a variable in the present invention;

[0049] Figure 8 This is a diagram showing the influence of the vertical height of the web rear edge and the horizontal distance between the outer side of the web rear edge and the disk edge in the present invention;

[0050] Figure 9 This is the test disk optimization model in the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] The present invention is described in further detail below with reference to the accompanying drawings:

[0054] See also Figure 1 In one embodiment of the present invention, a method for designing a test disc for a fatigue test of a rotating part is provided, comprising the following steps:

[0055] Step 1: Establish the basic model of the test plate and the basic model of the actual engine working plate: determine the connection size of the test equipment and the actual engine parts size, consider the structural space of the test equipment and the actual parts, and avoid assembly interference. At the same time, give priority to the use of solid structure to solve the problem of stress concentration in the center hole of the plate, and establish the basic model of the test plate (UG 3D model) as follows Figure 2 As shown, a basic model of the actual engine working disk is established.

[0056] Step 2: assemble the test disc and the actual engine working disc in three dimensions, apply test load parameters, and perform finite element analysis on the test disc basic model and the actual engine working disc basic model to obtain the overall equivalent stress and displacement distribution values ​​of the test disc basic model, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the test disc basic model.

[0057] Step 3, establishing a preliminary optimization model of the test disk based on the basic model of the test disk and the maximum equivalent stress position in the overall equivalent stress distribution of the basic model of the test disk;

[0058] Step 4: 3D assemble the preliminary optimized model of the test disk and the actual engine working disk, apply test load parameters, and perform finite element analysis on the preliminary optimized model of the test disk and the basic model of the actual engine working disk to obtain the overall equivalent stress and displacement distribution values ​​of the preliminary optimized model of the test disk, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disk under the test state of the preliminary optimized model of the test disk;

[0059] Step 5: Compare the maximum equivalent stress and displacement value in the overall equivalent stress distribution of the preliminary optimization model of the test disk, as well as the overall equivalent stress distribution and the maximum equivalent stress position and value of the working disk under the test parameters of the preliminary optimization model of the test disk with the test conditions. When the conditions are met, the design of the test disk under the fatigue test of the rotating part is completed.

[0060] Among them, according to Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 As shown, in step 3, the process of establishing a preliminary optimization model based on the test disk is as follows:

[0061] S1, based on the basic model of the test disk and the position of the maximum equivalent stress, obtain several optimized parameters of the test disk;

[0062] S2, determining the variation range and median value of several test plate optimization parameters according to the initial size of the test plate basic model;

[0063] S3, analyzing the influence of several test disk optimization parameters and obtaining a graph showing the change of optimization parameters;

[0064] S4, determining the optimization parameters with significant influence according to the optimization parameter variation law diagram;

[0065] S5, analyzing the optimization parameters with significant influence to obtain the values ​​of the optimization parameters;

[0066] S6, establish a preliminary optimization model for the test disk according to the values ​​of the optimization parameters, such as Figure 9 shown.

[0067] Specifically, analyze the influence of each optimization parameter. For each optimization parameter, vary one within its range, while the remaining optimization parameters remain constant and take the median of the range. Apply the same test load and analyze the influence of each optimization parameter one by one using finite element analysis. When analyzing one optimization parameter as a variable, select at least 10 points within the range and plot the variation patterns of each variable optimization parameter within its respective range.

[0068] Specifically, the web plate uses arc transitions and connection fillets to conform to processing practices, establishing an optimized model for the test plate. Parameter optimization indicates direction and rules. "Arc transitions and connection fillets" are basic design and processing practices added to the optimization process, further reducing the overall and maximum equivalent stress of the test plate.

[0069] The test plate in the present invention is a test tool that realizes the connection between the test piece and the test equipment, meets the test parameters and test status working requirements of the test piece, does not damage the test piece and the test equipment, and has various strength reserves far greater than the test piece.

[0070] In step 5 of the present invention, the experimental conditions are as follows:

[0071] When the maximum equivalent stress of the preliminary optimization model of the test disk is less than the material property stress value and the stress value corresponding to the SN curve, the achievable displacement value of the test disk is greater than the target value required by the assembly, and the overall equivalent stress distribution and maximum equivalent stress position of the working disk under the test parameters of the preliminary optimization model of the test disk are consistent with the overall equivalent stress distribution and maximum equivalent stress position of the working disk based on the actual working load parameters, and the maximum equivalent stress value meets the test load coefficient required by the standard, the design of the test disk under the fatigue test of rotating parts is completed.

[0072] Among them, finite element analysis is performed on the actual engine working disk based on the actual working load parameters to obtain the overall equivalent stress distribution of the working disk and the position and value of the maximum equivalent stress; among them, the actual working load parameters include assembly load, centrifugal load, temperature load and aerodynamic load.

[0073] The present invention also provides a test disc design system for a rotating part fatigue test, comprising a first model building module, a first processing module, a second processing module, a third processing module and a comparison module, wherein the second processing module comprises an acquisition module, a first determination module, a first analysis module, a second determination module, a second analysis module and a second model building module;

[0074] The first model building module is used to determine the connection dimensions of the test equipment and the dimensions of the actual engine parts, and to respectively build a basic model of the accompanying test disc and a basic model of the actual engine working disc;

[0075] The first processing module is used to assemble the test disc and the actual engine working disc in three dimensions, apply test load parameters, and perform finite element analysis on the test disc basic model and the actual engine working disc basic model to obtain the overall equivalent stress and displacement distribution values ​​of the test disc basic model, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the test disc basic model;

[0076] The second processing module is used to establish a preliminary optimization model of the test disk based on the test disk basic model and the maximum equivalent stress position in the overall equivalent stress distribution of the test disk basic model;

[0077] The third processing module is used to perform three-dimensional assembly of the preliminary optimized model of the test disc and the actual engine working disc, apply test load parameters, and perform finite element analysis on the preliminary optimized model of the test disc and the basic model of the actual engine working disc to obtain the overall equivalent stress and displacement distribution values ​​of the preliminary optimized model of the test disc, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the preliminary optimized model of the test disc;

[0078] A comparison module is used to compare the maximum equivalent stress and displacement value in the overall equivalent stress distribution of the preliminary optimization model of the test disc, as well as the overall equivalent stress distribution and the maximum equivalent stress position and value of the working disc under the test parameters of the preliminary optimization model of the test disc with the test conditions. When the conditions are met, the design of the test disc under the fatigue test of the rotating part is completed;

[0079] An acquisition module is used to obtain several optimized parameters of the test disk based on the basic model of the test disk and the maximum equivalent stress position;

[0080] The first determination module is used to determine the variation range and median value of several test plate optimization parameters according to the initial size of the test plate basic model;

[0081] The first analysis module is used to analyze the influence of several test disk optimization parameters and obtain the optimization parameter change law diagram;

[0082] The second determination module is used to determine the optimization parameters with significant influence according to the optimization parameter change regularity diagram;

[0083] The second analysis module is used to analyze the optimization parameters with significant influence and obtain the values ​​of the optimization parameters;

[0084] The second model building module is used to build a preliminary optimization model of the test plate according to the values ​​of the optimization parameters.

[0085] In summary, the present invention provides a method for designing a test disc for a fatigue test of a rotating part, establishes a basic model of the test disc, obtains the overall equivalent stress distribution of the basic model of the test disc by performing finite element analysis on the basic model of the test disc, and optimizes the basic model of the test disc to obtain a preliminary optimized model of the test disc. Through optimization, the strength reserve of the test disc under fatigue test is improved, and by comparing with the stress value of material properties and the stress value corresponding to the SN curve and the target value of assembly requirements, the test disc can achieve a better level under real simulation of actual working conditions, meet the test requirements, and accurately determine the fatigue life of the rotating part. At the same time, through optimization, the test disc can be recycled with the test equipment and the engine, reducing the test cost.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A method for designing a test disc for a rotating part fatigue test, characterized in that: The steps include: Step 1: Determine the connection size of the test equipment and the actual engine parts size, and respectively establish the basic model of the test plate and the basic model of the actual engine working plate; Step 2: 3D assemble the test disc and the actual engine working disc, apply test load parameters, and perform finite element analysis on the test disc basic model and the actual engine working disc basic model to obtain the overall equivalent stress and displacement distribution values ​​of the test disc basic model, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the test disc basic model; Step 3: Establish a preliminary optimization model of the test disk based on the basic model of the test disk and the maximum equivalent stress position in the overall equivalent stress distribution of the basic model of the test disk under the test state; The process of establishing a preliminary optimization model based on the test disk is as follows: S1, based on the basic model of the test disk and the position of the maximum equivalent stress, obtain several optimized parameters of the test disk; S2, determining the variation range and median value of several test plate optimization parameters according to the initial size of the test plate basic model; S3, analyzing the influence of several test disk optimization parameters and obtaining a graph showing the change of optimization parameters; S4, determining the optimization parameters with significant influence according to the optimization parameter variation law diagram; S5, analyzing the optimization parameters with significant influence to obtain the values ​​of the optimization parameters; S6, establishing a preliminary optimization model for the test disk according to the values ​​of the optimization parameters; Step 4: 3D assemble the preliminary optimized model of the test disk and the actual engine working disk, apply test load parameters, and perform finite element analysis on the preliminary optimized model of the test disk and the basic model of the actual engine working disk to obtain the overall equivalent stress and displacement distribution values ​​of the preliminary optimized model of the test disk, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disk under the test state of the preliminary optimized model of the test disk; Step 5: Compare the overall equivalent stress and displacement distribution values ​​of the obtained preliminary optimization model of the test disc, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the preliminary optimization model of the test disc with the test conditions. When the conditions are met, the design of the test disc under the rotating part fatigue test is completed; The test conditions are as follows: When the maximum equivalent stress of the preliminary optimization model of the test disk is less than the material property stress value and the stress value corresponding to the SN curve, the achievable displacement value of the test disk is greater than the target value required by the assembly, and the overall equivalent stress distribution and maximum equivalent stress position of the working disk under the test parameters of the preliminary optimization model of the test disk are consistent with the overall equivalent stress distribution and maximum equivalent stress position of the working disk based on the actual working load parameters, and the maximum equivalent stress value meets the test load coefficient required by the standard, the design of the test disk under the fatigue test of rotating parts is completed.

2. The method for designing a test disc for a rotating part fatigue test according to claim 1, characterized in that: In step 1, when establishing the basic model of the test disk, the test disk base plate model adopts a solid structure.

3. The method for designing a test disc for a rotating part fatigue test according to claim 1, characterized in that: In step 2, the test load parameters include the actual working load, the test speed and the test temperature.

4. The method for designing a test disc for a rotating part fatigue test according to claim 1, wherein: The optimization parameters of the test disk include the vertical height V1 of the web trailing edge, the horizontal distance H2 between the outer side of the web trailing edge and the disk edge, the horizontal distance H3 of the web trailing edge, and the transition fillet radius R4 of the web trailing edge root.

5. The method for designing a test disc for a rotating part fatigue test according to claim 1, wherein: According to the influence rules of several test disk optimization parameters, one of the test disk optimization parameters is changed within the variation range, while the other test disk optimization parameters remain unchanged and the median of the test disk optimization parameter variation range is taken. The same test load is applied, and the influence rules of each test disk optimization parameter are analyzed one by one by finite element analysis.

6. The method for designing a test disc for a rotating part fatigue test according to claim 1, wherein: Finite element analysis is performed on the actual engine working disc based on actual working load parameters to obtain the overall equivalent stress distribution of the working disc and the location and value of the maximum equivalent stress; among which the actual working load parameters include assembly load, centrifugal load, temperature load and aerodynamic load.

7. A system for designing a test disc for a fatigue test of a rotating part, for implementing a method for designing a test disc for a fatigue test of a rotating part according to any one of claims 1 to 6, characterized in that: include The first model building module is used to determine the connection dimensions of the test equipment and the dimensions of the actual engine parts, and to respectively build a basic model of the accompanying test disc and a basic model of the actual engine working disc; The first processing module is used to assemble the test disc and the actual engine working disc in three dimensions, apply test load parameters, and perform finite element analysis on the test disc basic model and the actual engine working disc basic model to obtain the overall equivalent stress and displacement distribution values ​​of the test disc basic model, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the test disc basic model; The second processing module is used to establish a preliminary optimization model of the test disk based on the basic model of the test disk and the maximum equivalent stress position in the overall equivalent stress distribution of the basic model of the test disk under the test state; The third processing module is used to perform three-dimensional assembly of the preliminary optimized model of the test disc and the actual engine working disc, apply test load parameters, and perform finite element analysis on the preliminary optimized model of the test disc and the basic model of the actual engine working disc to obtain the overall equivalent stress and displacement distribution values ​​of the preliminary optimized model of the test disc, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the preliminary optimized model of the test disc; The comparison module is used to compare the overall equivalent stress and displacement distribution values ​​of the preliminary optimization model of the test disc, as well as the overall equivalent stress distribution and maximum equivalent stress position and value of the actual engine working disc under the test state of the preliminary optimization model of the test disc with the test conditions. When the conditions are met, the design of the test disc under the rotating part fatigue test is completed.

8. The system for designing a test plate for a rotating part fatigue test according to claim 7, characterized in that: The second processing module includes: An acquisition module is used to obtain several optimized parameters of the test disk based on the basic model of the test disk and the maximum equivalent stress position; The first determination module is used to determine the variation range and median value of several test plate optimization parameters according to the initial size of the test plate basic model; The first analysis module is used to analyze the influence of several test disk optimization parameters and obtain the optimization parameter change law diagram; The second determination module is used to determine the optimization parameters with significant influence according to the optimization parameter change regularity diagram; The second analysis module is used to analyze the optimization parameters with significant influence and obtain the values ​​of the optimization parameters; The second model building module is used to build a preliminary optimization model for the test plate according to the values ​​of the optimization parameters.

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