Wheel disc fatigue acceleration test stress coefficient determination method and system and application

Abstract

The invention relates to the technical field of aero-engines, and discloses a wheel disc fatigue acceleration test stress coefficient determination method and system, and an application of the wheel disc fatigue acceleration test stress coefficient determination method and system. Analyzing by combining a performance curve of a wheel disc material to obtain a first upper limit threshold value of a wheel disc fatigue acceleration test stress coefficient; then carrying out a characteristic simulation piece fatigue test on the key part of the wheel disc to obtain a second upper limit threshold value of the stress coefficient of the wheel disc fatigue acceleration test, and reasonably determining the maximum value of the stress coefficient of the wheel disc fatigue acceleration test by comparing the first upper limit threshold value with the second upper limit threshold value; the service life damage equivalence and the same failure mechanism before and after the fatigue acceleration test of the wheel disc are ensured, the situation of wheel disc service life verification deviation danger caused by non-equivalent damage due to unreasonable stress coefficient in the existing method is avoided, the safety and the reliability of the wheel disc in the service life are improved, and the service life of the wheel disc is prolonged. The fatigue life of the wheel disc can be effectively verified.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engines and discloses a method, system and application for determining a stress coefficient of a wheel disk fatigue acceleration test. Background Art

[0002] As a typical key component, the safe life of aircraft engine discs is currently mainly determined by fatigue tests on test instruments. Due to the difference between the load on the test instrument and the engine state, there is a situation where the disc stress under test conditions is higher than that of the engine, that is, fatigue acceleration occurs.

[0003] At present, the stress coefficient values ​​used in accelerated fatigue tests on wheels are mainly based on the early data given in EGD-3. These data are determined based on traditional wheel materials and specific stress states, and their applicability to wheels used in current engines remains to be discussed. If the selected stress coefficient is unreasonable, the wheel fatigue life verification will be insufficient, resulting in dangerous results, which will seriously threaten the safe operation of the engine. Summary of the Invention

[0004] The purpose of the present invention is to provide a method, system and application for determining the stress coefficient of a wheel disk fatigue acceleration test, which can provide support for the reasonable determination of wheel disk fatigue damage and ensure the safety and reliability of the wheel disk.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is: A method for determining a stress coefficient of a wheel disk accelerated fatigue test, comprising: Mark point A where the given test stress is located on the logarithmic stress-life curve of the aircraft engine disc material at a given test temperature; Selecting point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculating a first slope of a line segment passing through points A and B; wherein an absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; Selecting a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope and the first slope of a line segment passing through points A and C is less than a second preset deviation threshold, and determining a ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; Conduct fatigue tests on characteristic simulation parts at key parts of the wheel disc to obtain a first ratio of the logarithmic life standard deviation to the logarithmic life mean under multiple groups of test stresses for the characteristic simulation parts; wherein the minimum test stress value of the characteristic simulation parts is the test stress, and the maximum test stress value of the characteristic simulation parts is the maximum stress value at point C; Analyze and obtain, based on the first ratio value under each set of test stresses, an absolute value of a deviation between the first ratio value under each set of test stresses and the first ratio value of a test group whose test stress is the test stress; determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; The minimum value between the first upper limit threshold and the second upper limit threshold is taken as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test.

[0006] Furthermore, the first preset deviation threshold The value range is , is the test stress; the second preset deviation threshold value is 0.01, and the third preset deviation threshold value is 0.001.

[0007] Furthermore, when carrying out fatigue tests on characteristic simulation parts of key parts of the wheel, the number of test stress groups shall not be less than 3, and the valid fatigue life data under each group of test stress shall not be less than 15.

[0008] Furthermore, a method for obtaining a logarithmic stress-life curve of an aircraft engine disk material at a given test temperature includes: The stress and temperature of the aircraft engine disc under the life assessment working condition are used as the test stress and test temperature under the disc test benchmark cycle number respectively; According to the stress-life curve of the wheel disc material at a typical temperature, the stress-life curve of the wheel disc material at the test temperature is obtained by logarithmic interpolation; The stress-life curve of the wheel disc material at the test temperature is plotted in a double logarithmic coordinate system to obtain a logarithmic stress-life curve of the wheel disc material at the test temperature.

[0009] To achieve the above technical effects, the present invention further provides a system for determining a stress coefficient of a wheel disk fatigue acceleration test, comprising: The first point marking module is used to mark point A where a given test stress is located on the logarithmic stress-life curve of the aircraft engine disc material at a given test temperature; A second point marking module is configured to select a point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculate a first slope of a line segment passing through points A and B; wherein the absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; a first analysis module configured to select a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope of the line segment passing through points A and C and the first slope is less than a second preset deviation threshold, and determine a ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; a data acquisition module for obtaining, based on a fatigue test of a characteristic simulated component at a key part of a wheel disc, a first ratio of a logarithmic life standard deviation to a logarithmic life mean under multiple groups of test stresses for the characteristic simulated component; wherein the minimum test stress value of the characteristic simulated component is the test stress, and the maximum test stress value of the characteristic simulated component is the maximum stress value at point C; a second analysis module configured to analyze, based on the first ratio under each set of test stresses, an absolute value of a deviation between the first ratio under each set of test stresses and the first ratio of a test group in which the test stress is the test stress; and determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; The comparison output module is used to take the minimum value between the first upper limit threshold and the second upper limit threshold as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test.

[0010] Furthermore, in the second point marking module, the first preset deviation threshold The value range is , is the test stress; in the first analysis module, the second preset deviation threshold value is 0.01; in the second analysis module, the third preset deviation threshold value is 0.001.

[0011] Furthermore, the first point marking module further includes: a parameter determination unit, for using the stress and temperature of the aircraft engine disc under the life assessment working condition as the test stress and test temperature under the disc test reference cycle number; A first curve construction unit is configured to obtain a stress-life curve of the wheel disc material at a test temperature by logarithmic interpolation based on a stress-life curve of the wheel disc material at a typical temperature; The second curve construction unit is used to plot the stress-life curve of the wheel disc material at the test temperature in a double logarithmic coordinate system to obtain the logarithmic stress-life curve of the wheel disc material at the test temperature.

[0012] To achieve the above technical effects, the present invention further provides an application of a method for determining a stress coefficient of a wheel disk accelerated fatigue test, comprising: Select the wheel disk fatigue accelerated test stress coefficient within the upper limit value range of the wheel disk fatigue accelerated test stress coefficient , combined with the number of cycles of the wheel test benchmark, using Calculate the number of test cycles required for the wheel acceleration test ,in is the number of benchmark cycles of the roulette wheel test, , The maximum test stress The mean logarithmic life of the following characteristic simulation parts, The test stress is the test stress Mean logarithmic life of the simulated parts with the following characteristics.

[0013] Compared with the prior art, the present invention has the following beneficial effects: under the conditions that the life damage before and after the wheel fatigue accelerated test is equivalent and the failure mechanism is the same, the present invention reasonably determines the maximum value of the stress coefficient of the wheel fatigue accelerated test, avoiding the situation in the prior method where the damage inequality caused by the unreasonable stress coefficient causes the wheel life verification to be dangerous, thereby improving the safety and reliability of the wheel during its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a flow chart of the method for determining the stress coefficient of the wheel disk accelerated fatigue test in Example 1 or 2; Figure 2 This is a block diagram of the system structure for determining the stress coefficient of the wheel disk accelerated fatigue test in Example 1; Figure 3 This is a logarithmic stress-life curve of the wheel disc material at the test temperature in Example 2; Among them, 1. First point marking module; 2. Second point marking module; 3. First analysis module; 4. Data acquisition module; 5. Second analysis module; 6. Comparison output module. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the present invention to the following embodiments, as all technologies implemented based on the present invention fall within the scope of the present invention.

[0016] Example 1 See also Figures 1 to 2 A method for determining a stress coefficient of a wheel disk accelerated fatigue test comprises: Mark point A where the given test stress is located on the logarithmic stress-life curve of the aircraft engine disc material at a given test temperature; Selecting point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculating a first slope of a line segment passing through points A and B; wherein an absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; Selecting a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope and the first slope of a line segment passing through points A and C is less than a second preset deviation threshold, and determining a ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; Conduct fatigue tests on characteristic simulation parts at key parts of the wheel disc to obtain a first ratio of the logarithmic life standard deviation to the logarithmic life mean under multiple groups of test stresses for the characteristic simulation parts; wherein the minimum test stress value of the characteristic simulation parts is the test stress, and the maximum test stress value of the characteristic simulation parts is the maximum stress value at point C; Analyze and obtain, based on the first ratio value under each set of test stresses, an absolute value of a deviation between the first ratio value under each set of test stresses and the first ratio value of a test group whose test stress is the test stress; determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; The minimum value between the first upper limit threshold and the second upper limit threshold is taken as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test.

[0017] In this embodiment, before the accelerated test of the wheel fatigue test, considering the test stress and test temperature conditions of the wheel, the first upper limit threshold of the wheel fatigue accelerated test stress coefficient is first obtained by combining the performance curve analysis of the wheel material; then, a characteristic simulation part fatigue test is carried out on the key parts of the wheel to obtain the second upper limit threshold of the wheel fatigue accelerated test stress coefficient. By comparing the first upper limit threshold and the second upper limit threshold, the maximum value of the wheel fatigue accelerated test stress coefficient is reasonably determined to ensure that the life damage is equivalent and the failure mechanism is the same before and after the wheel fatigue accelerated test, avoiding the situation in which the wheel life verification is dangerous due to the unequal damage caused by the unreasonable stress coefficient in the existing method, improving the safety and reliability of the wheel during its service life, and realizing effective verification of the fatigue life of the wheel, providing support for the wheel life management.

[0018] Based on the same inventive concept, this embodiment also provides a system for determining a stress coefficient of a wheel disk fatigue acceleration test, comprising: The first point marking module 1 is used to mark point A where a given test stress is located on the logarithmic stress-life curve of the aircraft engine disc material at a given test temperature; A second point marking module 2 is configured to select a point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculate a first slope of a line segment passing through points A and B; wherein the absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; A first analysis module 3 is configured to select a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope of the line segment passing through points A and C and the first slope is less than a second preset deviation threshold, and determine a ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; a data acquisition module 4 configured to obtain, based on a fatigue test of a characteristic simulated component at a key portion of a wheel disc, a first ratio of a logarithmic life standard deviation to a logarithmic life mean under multiple groups of test stresses for the characteristic simulated component; wherein the minimum test stress value of the characteristic simulated component is the test stress, and the maximum test stress value of the characteristic simulated component is the maximum stress value at point C; The second analysis module 5 is configured to analyze, based on the first ratio under each set of test stresses, an absolute value of a deviation between the first ratio under each set of test stresses and the first ratio of a test group in which the test stress is the test stress; and determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; The comparison output module 6 is used to take the minimum value between the first upper limit threshold and the second upper limit threshold as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test.

[0019] In this embodiment, the first point marking module 1 further includes: The parameter determination unit 101 is configured to use the stress and temperature of the aircraft engine disc under the life assessment working condition as the test stress and test temperature under the disc test reference cycle number; The first curve construction unit 102 is configured to obtain a stress-life curve of the wheel disc material at a test temperature by logarithmic interpolation based on the stress-life curve of the wheel disc material at a typical temperature; The second curve construction unit 103 is configured to plot the stress-life curve of the wheel disc material at the test temperature in a double logarithmic coordinate system to obtain a logarithmic stress-life curve of the wheel disc material at the test temperature.

[0020] Example 2 See also Figure 1 、 Figure 3 A method for determining a stress coefficient of a wheel disk accelerated fatigue test comprises: Step 1: Using the stress and temperature of the aircraft engine disc under the life assessment working condition as the test stress and test temperature under the disc test benchmark cycle number, respectively, and obtaining the stress-life curve of the disc material at the test temperature by logarithmic interpolation based on the stress-life curve of the disc material at a typical temperature; In this embodiment, the wheel is tested under the test reference state (no acceleration) and test temperature After confirmation, according to the material manual, the wheel material is tested at typical temperature. 、 The stress-life curve under the test temperature is obtained by logarithmic interpolation. Stress-life curve of the lower disc material, where the test temperature Should be between the typical temperature of the wheel material 、 Between, that is .

[0021] Step 2: plotting the stress-life curve of the wheel disc material at the test temperature in a double logarithmic coordinate system to obtain a logarithmic stress-life curve of the wheel disc material at the test temperature; like Figure 3 As shown, the test temperature The stress-life curve of the lower wheel disc material is drawn in a double logarithmic coordinate system, and the curve is not allowed to extend outward.

[0022] Step 3: Taking the point of the test stress on the logarithmic stress-life curve as point A, selecting point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculating a first slope of a line segment passing through points A and B; wherein the absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; In this embodiment, let the logarithmic stress life curve be subjected to the test stress The point is point A, then the coordinates of point A are On this basis, the stress in the curve is determined to be The corresponding point is point B, where , , the life of point B is , then the coordinates of point B are According to the formula Get the slope of the line segment passing through points A and B .

[0023] Step 4: Selecting a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope and the first slope of the line segment passing through points A and C is less than a second preset deviation threshold, and determining the ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; In this embodiment, a point C is taken on the logarithmic stress-life curve where any stress is greater than the test stress. The coordinates of point C are: , ;according to Get the slope of the line segment passing through points A and C , and then find satisfaction of Maximum , then according to the formula The first upper limit threshold of the stress coefficient of the wheel disk fatigue accelerated test is preliminarily obtained .

[0024] Step 5: Conduct fatigue tests on characteristic simulation parts at key parts of the wheel disc to obtain a first ratio of the logarithmic life standard deviation to the logarithmic life mean under multiple groups of test stresses of the characteristic simulation parts; In this embodiment, when carrying out fatigue test of characteristic simulation parts, the test stress of the characteristic simulation parts should be no less than 3 groups, and the minimum test stress of the characteristic simulation parts is the test stress The maximum stress value of the characteristic simulation part is the maximum stress value of point C. ; According to the test stress increase not exceeding Determine the test stresses of other test groups, requiring that there are no less than 15 valid fatigue life data under each test stress group. Based on the valid fatigue test life data of the characteristic simulation parts, calculate the logarithmic life standard deviation and logarithmic life mean under each test stress group.

[0025] According to the logarithmic life standard deviation and logarithmic life mean results under each set of test stress, calculate the first ratio of the logarithmic life standard deviation and the logarithmic life mean ,in For the Standard deviation of logarithmic life under group test stress, For the Mean logarithmic life under group test stress, , is the total number of test stress groups.

[0026] It should be noted that when conducting fatigue tests on characteristic simulation parts for key parts of the wheel disc, the characteristic simulation parts should be taken from the same forging blank and the forging process should be consistent with the wheel disc forging blank. The characteristic simulation parts should be sampled in the same direction in the forging blank, and the processing technology of the characteristic simulation parts should be consistent with that of the key parts of the engine wheel disc.

[0027] Step 6: Analyze and obtain, based on the first ratio value under each test stress group, an absolute value of the deviation between the first ratio value under each test stress group and the first ratio value of the test group whose test stress is the test stress; determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; In this embodiment, find Maximum test stress , maximum test stress With the test stress The ratio of is determined as the second upper limit threshold of the stress coefficient of the wheel disk fatigue accelerated test , that is .

[0028] Step 7: Taking the minimum value between the first upper limit threshold and the second upper limit threshold as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test; That is, if , then the upper limit value of the stress coefficient of the wheel fatigue acceleration test is the first upper limit threshold ;like , then the upper limit of the stress coefficient of the modified wheel fatigue acceleration test is the second upper limit threshold During the accelerated fatigue test of the wheel disc, it is sufficient to ensure that the stress coefficient does not exceed the upper limit value to ensure that the life damage before and after acceleration is equivalent and the failure mechanism is the same.

[0029] Based on the same inventive concept, this embodiment also provides an application of a method for determining a stress coefficient of a wheel disk accelerated fatigue test, comprising: Based on the upper limit of the wheel fatigue accelerated test stress coefficient obtained in step 7, a wheel fatigue accelerated test stress coefficient is selected within the upper limit range, and combined with the wheel test benchmark cycle number, the wheel fatigue accelerated test stress coefficient is selected. Calculate the number of test cycles required for the wheel acceleration test ,in is the number of benchmark cycles of the roulette wheel test, To select a wheel disk fatigue accelerated test stress coefficient within the upper limit value range determined in step 7, , is the maximum test stress in step 6 The mean logarithmic life of the following characteristic simulation parts, The test stress is the test stress Mean logarithmic life of the characteristic simulation parts under (minimum test stress).

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining the stress coefficient of a wheel disk accelerated fatigue test, characterized in that: include: Mark point A where the given test stress is located on the logarithmic stress-life curve of the aircraft engine disc material at a given test temperature; Selecting point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculating a first slope of a line segment passing through points A and B; wherein an absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; Selecting a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope and the first slope of a line segment passing through points A and C is less than a second preset deviation threshold, and determining a ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; Conduct fatigue tests on characteristic simulation parts at key parts of the wheel disc to obtain a first ratio of the logarithmic life standard deviation to the logarithmic life mean under multiple groups of test stresses for the characteristic simulation parts; wherein the minimum test stress value of the characteristic simulation parts is the test stress, and the maximum test stress value of the characteristic simulation parts is the maximum stress value at point C; Analyze and obtain, based on the first ratio value under each set of test stresses, an absolute value of a deviation between the first ratio value under each set of test stresses and the first ratio value of a test group whose test stress is the test stress; determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; The minimum value between the first upper limit threshold and the second upper limit threshold is taken as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test.

2. The method for determining the stress coefficient of a wheel disk fatigue acceleration test according to claim 1, characterized in that: The first preset deviation threshold The value range is , is the test stress; The second preset deviation threshold is 0.01, and the third preset deviation threshold is 0.

001.

3. The method for determining the stress coefficient of a wheel disk fatigue acceleration test according to claim 1, characterized in that: When carrying out fatigue tests on characteristic simulation parts on key parts of the wheel, the number of test stress groups shall not be less than 3, and the valid fatigue life data under each group of test stress shall not be less than 15.

4. The method for determining the stress coefficient of a wheel disk fatigue acceleration test according to claim 1, characterized in that: The method for obtaining the logarithmic stress-life curve of aircraft engine disc material at a given test temperature includes: The stress and temperature of the aircraft engine disc under the life assessment working condition are used as the test stress and test temperature under the disc test benchmark cycle number respectively; According to the stress-life curve of the wheel disc material at a typical temperature, the stress-life curve of the wheel disc material at the test temperature is obtained by logarithmic interpolation; The stress-life curve of the wheel disc material at the test temperature is plotted in a double logarithmic coordinate system to obtain a logarithmic stress-life curve of the wheel disc material at the test temperature.

5. A wheel disk fatigue accelerated test stress coefficient determination system, characterized in that: include: The first point marking module is used to mark point A where a given test stress is located on the logarithmic stress-life curve of the aircraft engine disc material at a given test temperature; A second point marking module is configured to select a point B on the logarithmic stress-life curve where the stress is less than the test stress, and calculate a first slope of a line segment passing through points A and B; wherein the absolute deviation between the stress at point B and the test stress is less than a first preset deviation threshold; a first analysis module configured to select a point C on the logarithmic stress-life curve where the stress is greater than the test stress, and where the absolute deviation between the second slope of the line segment passing through points A and C and the first slope is less than a second preset deviation threshold, and determine a ratio of the maximum stress at point C to the test stress as a first upper threshold of the stress coefficient of the wheel disk fatigue acceleration test; a data acquisition module for obtaining, based on a fatigue test of a characteristic simulated component at a key part of a wheel disc, a first ratio of a logarithmic life standard deviation to a logarithmic life mean under multiple groups of test stresses for the characteristic simulated component; wherein the minimum test stress value of the characteristic simulated component is the test stress, and the maximum test stress value of the characteristic simulated component is the maximum stress value at point C; a second analysis module configured to analyze, based on the first ratio under each set of test stresses, an absolute value of a deviation between the first ratio under each set of test stresses and the first ratio of a test group in which the test stress is the test stress; and determine the ratio of the maximum test stress to the test stress for which the absolute value of the deviation is less than or equal to a third preset deviation threshold as a second upper limit threshold of the stress coefficient of the wheel disk fatigue acceleration test; The comparison output module is used to take the minimum value between the first upper limit threshold and the second upper limit threshold as the upper limit value of the stress coefficient of the wheel disk fatigue acceleration test.

6. The wheel disk fatigue accelerated test stress coefficient determination system according to claim 5, characterized in that: In the second point marking module, the first preset deviation threshold The value range is , is the test stress; In the first analysis module, the second preset deviation threshold value is 0.01; in the second analysis module, the third preset deviation threshold value is 0.

001.

7. The method for determining the stress coefficient of a wheel disk fatigue acceleration test according to claim 5, characterized in that: The first point marking module also includes: a parameter determination unit, for using the stress and temperature of the aircraft engine disc under the life assessment working condition as the test stress and test temperature under the disc test reference cycle number; A first curve construction unit is configured to obtain a stress-life curve of the wheel disc material at a test temperature by logarithmic interpolation based on a stress-life curve of the wheel disc material at a typical temperature; The second curve construction unit is used to plot the stress-life curve of the wheel disc material at the test temperature in a double logarithmic coordinate system to obtain the logarithmic stress-life curve of the wheel disc material at the test temperature.

8. An application of a method for determining a stress coefficient of a wheel disk accelerated fatigue test, the application being based on the method for determining a stress coefficient of a wheel disk accelerated fatigue test according to any one of claims 1 to 4, characterized in that: include: Select the wheel disk fatigue accelerated test stress coefficient within the upper limit value range of the wheel disk fatigue accelerated test stress coefficient , combined with the number of cycles of the wheel test benchmark, using Calculate the number of test cycles required for the wheel acceleration test ,in is the number of benchmark cycles of the roulette wheel test, , The maximum test stress The mean logarithmic life of the following characteristic simulation parts, The test stress is the test stress Mean logarithmic life of the simulated parts with the following characteristics.

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