Method and equipment for determining fatigue life consumption of aero-engine wheel disc

Abstract

The invention relates to the technical field of aviation equipment monitoring, and particularly provides a fatigue life consumption determination method and equipment for an aero-engine wheel disc, and the method comprises the following steps: measuring any rotation speed cycle of the wheel disc, and calculating the fatigue life consumption of the aero-engine wheel disc based on the rotation speed cycle; acquiring corresponding peak stress and valley stress; based on the peak stress and the valley stress, the maximum equivalent stress is obtained by combining the preset stress ratio of the wheel disc and the material strength of the wheel disc; on the basis of the maximum equivalent stress, a fatigue damage conversion coefficient is obtained by combining a stress and life curve model; and obtaining the service life consumption of the wheel disc based on the fatigue damage conversion coefficient in combination with a rotating speed cycle value corresponding to the rotating speed cycle. A relation is established between the service life consumption of the wheel disc and the rotating speed circulation, the accuracy of the obtained service life consumption of the wheel disc is ensured without a given rotating speed circulation interval and a fatigue damage conversion coefficient, the maintenance period of the engine is shortened, and the use economy of the engine is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation equipment monitoring, and particularly relates to a method and device for determining the fatigue life consumption of an aero-engine disk. Background Art

[0002] The life management mode of an aero-engine requires giving the fatigue life consumption of life-limiting components such as the engine disk under different working conditions, so as to be able to monitor the health of the engine during use, so that maintenance and replacement can be carried out before the disk is damaged, ensuring flight safety.

[0003] The existing fatigue life consumption is generally determined by the linear fatigue damage accumulation method. It is necessary to first divide different rotational speed cycle intervals according to the definition of the engine state, and then calculate the fatigue life corresponding to the rotational speed cycle with the maximum fatigue damage in each rotational speed cycle interval, and use this fatigue life as the fatigue life of each rotational speed cycle in the corresponding rotational speed cycle interval, so as to calculate the corresponding fatigue damage conversion coefficient, thereby determining the fatigue life consumption of each rotational speed cycle. However, the rotational speed cycle interval and the corresponding fatigue damage conversion coefficient are usually given before the engine is delivered. If a rotational speed cycle outside the range of the rotational speed cycle interval appears during actual operation of the engine, it is impossible to accurately obtain the corresponding fatigue damage conversion coefficient, making it difficult to determine the fatigue life consumption of the rotational speed cycle. Moreover, since the fatigue damage conversion coefficients given before delivery are all obtained by calculating the rotational speed cycle with the maximum fatigue damage in the corresponding rotational speed cycle interval, the method for determining the overall fatigue life consumption is relatively general and conservative, resulting in deviations in the finally determined fatigue life consumption. In order to avoid engine damage, it is only possible to correspondingly increase the maintenance period of the engine, thus affecting the economy of engine use. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a method and device for determining the fatigue life consumption of an aero-engine disk. Among them, a method for determining the fatigue life consumption of an aero-engine disk includes the following steps:

[0005] Measure any rotational speed cycle of the disk, and based on the rotational speed cycle, obtain the corresponding peak stress and valley stress;

[0006] Based on the peak stress and the valley stress, and in combination with the preset stress ratio of the disk and the material strength of the disk, obtain the maximum equivalent stress;

[0007] Based on the maximum equivalent stress, and in combination with the stress-life curve model, obtain the fatigue damage conversion coefficient;

[0008] Based on the fatigue damage conversion coefficient, and in combination with the rotational speed cycle value corresponding to the rotational speed cycle, obtain the disk life consumption.

[0009] In some specific embodiments, for any rotation cycle of the measuring wheel disc, and based on the rotation cycle, the corresponding peak stress and valley stress are obtained, including the following steps:

[0010] Measure any of the rotation cycles of the measuring wheel disc, and obtain the maximum rotation speed and the minimum rotation speed corresponding to the rotation cycle;

[0011] Based on the maximum rotation speed and the minimum rotation speed, obtain the corresponding peak stress and valley stress.

[0012] In some specific embodiments, the peak stress and the valley stress are obtained according to the following formula:

[0013]

[0014] Where N is the rotation speed of the wheel disc under the standard working cycle, σ is the stress corresponding to the rotation speed of the wheel disc under the standard working cycle, N i is the rotation speed of the wheel disc under the actual working cycle, and σ i is the stress corresponding to the rotation speed of the wheel disc under the actual working cycle.

[0015] In some specific embodiments, based on the peak stress and the valley stress, and in combination with the preset stress ratio of the wheel disc and the material strength of the wheel disc, the maximum equivalent stress is obtained, including the following steps:

[0016] Based on the peak stress and the valley stress, obtain the corresponding first stress amplitude and first mean stress;

[0017] Based on the first stress amplitude and the first mean stress, and in combination with the preset stress ratio of the wheel disc and the material strength of the wheel disc, obtain the second stress amplitude and second mean stress restricted by the preset stress ratio;

[0018] Based on the second stress amplitude and the second mean stress, obtain the maximum equivalent stress.

[0019] In some specific embodiments, the second stress amplitude and the second mean stress are obtained according to the following formula:

[0020]

[0021] Where σ a1 is the first stress amplitude, σ m1 is the first mean stress, R is the preset stress ratio, σ b is the material strength of the wheel disc, σ a2 is the second stress amplitude, and σ m2 is the second mean stress;

[0022] The maximum equivalent stress is obtained according to the following formula:

[0023] σ m2 +σ a2 =σ max,R ;

[0024] where σ max,R is the maximum equivalent stress.

[0025] In some specific embodiments, based on the maximum equivalent stress and combining with the curve model of stress and life, obtaining the fatigue damage conversion coefficient includes the following steps:

[0026] Obtain the material fatigue test data of the disk and fit the material fatigue test data to determine the parameters of the curve model of stress and life;

[0027] Based on the maximum equivalent stress and the parameters of the curve model of stress and life, substitute them into the curve model of stress and life to obtain the fatigue life of the disk under the actual working cycle;

[0028] Based on the fatigue life of the disk under the actual working cycle and combining with the fatigue life of the disk under the standard working cycle, obtain the fatigue damage conversion coefficient.

[0029] In some specific embodiments, the fatigue life of the disk under the actual working cycle is obtained according to the following formula:

[0030] lgN fi =A - B×lg(σ max,R - C);

[0031] where A, B, and C are all constant parameters, σ max,R is the maximum equivalent stress, and N fi is the fatigue life of the disk under the actual working cycle;

[0032] The fatigue damage conversion coefficient is obtained according to the following formula:

[0033]

[0034] where K i is the fatigue damage conversion coefficient, and N f is the fatigue life of the disk under the standard working cycle.

[0035] In some specific embodiments, based on the fatigue damage conversion coefficient and combining with the rotational speed cycle value corresponding to the rotational speed cycle, obtaining the disk life consumption includes the following steps:

[0036] Statistically analyze the measured rotational speed spectrum data of the roulette wheel to obtain the number of occurrences corresponding to the rotational speed cycle;

[0037] Based on the fatigue damage conversion coefficient and the number of occurrences, obtain the life consumption of the roulette wheel.

[0038] In some specific embodiments, the life consumption of the roulette wheel is obtained according to the following formula:

[0039] ΔN f =∑(n i ×K i );

[0040] Where, ΔN f is the life consumption of the roulette wheel, n i is the number of occurrences, and K i is the fatigue damage conversion coefficient;

[0041] Based on the maximum rotational speed and the minimum rotational speed, the fatigue damage conversion coefficient is obtained according to the following formula:

[0042]

[0043] Where, N is the rotational speed of the roulette wheel under the standard working cycle, σ is the stress corresponding to the rotational speed of the roulette wheel under the standard working cycle, N f is the fatigue life of the roulette wheel under the standard working cycle, R is the preset stress ratio, σ b is the material strength of the roulette wheel, N max,i is the maximum rotational speed, and N min,i is the minimum rotational speed.

[0044] An electronic device based on the same concept, including: at least one processor and at least one memory, the memory is data-connected to the processor;

[0045] The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors, so that the at least one processor can execute the method for determining the fatigue life consumption of the aero-engine roulette wheel described in any one of the above specific embodiments.

[0046] Compared with the prior art, the method for determining the fatigue life consumption of the aeroengine disk of the present invention has at least the following advantages: By measuring any speed cycle of the disk, the corresponding peak stress and valley stress are obtained, and in combination with the preset stress ratio of the disk and the material strength of the disk, through the curve model of stress and life, the corresponding fatigue damage conversion coefficient can be obtained, and then the corresponding disk life consumption can be obtained. A connection is established between the disk life consumption and the speed cycle, and there is no need to rely on the given speed cycle interval and the corresponding fatigue damage conversion coefficient anymore. Even if a speed cycle outside the given speed cycle interval range appears during actual operation, the fatigue damage conversion coefficient corresponding to this speed cycle can be obtained through the measured speed cycle, and then the determination of the corresponding disk life consumption can be realized. At the same time, since the determination of the disk life consumption is no longer affected by the given speed cycle interval and the corresponding fatigue damage conversion coefficient, the accuracy of the further obtained corresponding disk life consumption can be ensured, which is convenient for reducing the maintenance cycle of the engine and improving the economic efficiency of engine use.

[0047] Compared with the prior art, the electronic device of the present invention has at least the following advantages: Since it can execute the method for determining the fatigue life consumption of the aeroengine disk described above, it has the same beneficial effects as the method for determining the fatigue life consumption of the aeroengine disk described above. Therefore, it will not be elaborated here again.

[0048] Other features and advantages of the present invention will be described in the subsequent description, and part of them will become obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0050] Figure 1 The flowchart of the method for determining the fatigue life consumption of the aeroengine disk in the embodiment of the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] The present invention provides a method for determining the fatigue life consumption of an aero-engine disk, including the following steps:

[0053] Measure any speed cycle of the disk, and based on the speed cycle, obtain the corresponding peak stress and valley stress. By measuring the speed cycle during the actual operation of the disk, the corresponding peak stress and valley stress can be obtained after calculation.

[0054] Measure any speed cycle of the disk, and based on the speed cycle, obtain the corresponding peak stress and valley stress, specifically including the following steps:

[0055] Measure any speed cycle of the disk, and obtain the corresponding maximum speed and minimum speed of the speed cycle. Specifically, when the disk is actually operating, the speed of the disk is detected in real time by a speed detection device, so as to facilitate obtaining the speed cycle during the operation of the disk, and selecting any one of the speed cycles to be detected, and further obtaining the maximum speed and minimum speed in the selected speed cycle, where the maximum speed is the speed peak in the speed cycle, and the minimum speed is the speed valley in the speed cycle.

[0056] Based on the maximum speed and minimum speed, obtain the corresponding peak stress and valley stress. After obtaining the maximum speed and minimum speed in the selected speed cycle, by combining the disk speed and the corresponding stress under the given standard working cycle, under the relationship between the disk speed and stress, obtain the peak stress and valley stress corresponding to the maximum speed and minimum speed respectively. Among them, the peak stress is the stress corresponding to the maximum speed under the actual working cycle of the disk, and the valley stress is the stress corresponding to the minimum speed under the actual working cycle of the disk.

[0057] Further, the peak stress and valley stress are obtained according to the following formula:

[0058]

[0059] where N is the disk speed under the standard working cycle, σ is the stress corresponding to the disk speed under the standard working cycle, N i is the disk speed under the actual working cycle, and σ i is the stress corresponding to the disk speed under the actual working cycle.

[0060] Specifically, both the disc rotation speed under the standard working cycle and the stress corresponding to the disc rotation speed under the standard working cycle are data given before the disc is delivered. Moreover, under the relationship between the disc rotation speed and stress, the square of the ratio of the disc rotation speed under the actual working cycle to the disc rotation speed under the standard working cycle is equal to the ratio of the stress corresponding to the disc rotation speed under the actual working cycle to the stress corresponding to the disc rotation speed under the standard working cycle. Therefore, by substituting the actual rotation speed of the disc into the above formula, the stress of the disc corresponding to this actual rotation speed can be calculated. Among them, by substituting the maximum rotation speed in the selected rotation speed cycle into the above formula, the peak stress corresponding to the maximum rotation speed can be obtained, and then by substituting the minimum rotation speed in the selected rotation speed cycle into the above formula, the valley stress corresponding to the minimum rotation speed can be obtained. A preliminary connection is established between the disc life consumption and the specific rotation speed cycle, which can ensure the accuracy of the corresponding disc life consumption finally obtained, facilitate reducing the maintenance cycle of the engine, and improve the economy of engine use.

[0061] Based on the peak stress and the valley stress, in combination with the preset stress ratio of the disc and the material strength of the disc, the maximum equivalent stress is obtained. After obtaining the peak stress and the valley stress, by combining the limitation of the preset stress ratio of the disc, the maximum equivalent stress obtained can meet the requirements of the preset stress ratio of the disc, which can unify the final results calculated according to each rotation speed cycle and facilitate subsequent calculations.

[0062] Among them, based on the peak stress and the valley stress, in combination with the preset stress ratio of the disc and the material strength of the disc, obtaining the maximum equivalent stress specifically includes the following steps:

[0063] Based on the peak stress and the valley stress, the corresponding first stress amplitude and first mean stress are obtained. After obtaining the peak stress and the valley stress of the disc corresponding to the maximum rotation speed and the minimum rotation speed of the selected rotation speed cycle, by calculating the combination of the peak stress and the valley stress, the first stress amplitude and the first mean stress corresponding to the selected rotation speed cycle can be obtained. Among them, the first stress amplitude is half of the difference between the peak stress and the valley stress, and the first mean stress is half of the sum of the peak stress and the valley stress.

[0064] Based on the first stress amplitude and the first mean stress, combined with the preset stress ratio of the disk and the material strength of the disk, obtain the second stress amplitude and the second mean stress restricted by the preset stress ratio. Both the preset stress ratio of the disk and the material strength of the disk are existing data. By substituting the preset stress ratio of the disk and the material strength of the disk, the first stress amplitude and the first mean stress are restricted, so that the second stress amplitude and the second mean stress restricted by the preset stress ratio of the disk can be obtained. Furthermore, multiple different stress cycles corresponding to each rotational speed cycle can be respectively converted into stress cycles with a preset stress ratio equivalent in fatigue life, and the calculation results of each stress cycle can be unified, facilitating subsequent calculation substitution.

[0065] Furthermore, the second stress amplitude and the second mean stress are obtained according to the following formula:

[0066]

[0067] where, σ a1 is the first stress amplitude, σ m1 is the first mean stress, R is the preset stress ratio, σ b is the material strength of the disk, σ a2 is the second stress amplitude, σ m2 is the second mean stress.

[0068] Specifically, through the equivalent life conversion formula, the relationship between the second stress amplitude and the second mean stress and the first stress amplitude and the first mean stress can be obtained. Among them, both the preset stress ratio and the material strength of the disk are existing data. By transforming the first stress amplitude and the first mean stress through the above two formulas, the second stress amplitude and the second mean stress meeting the requirements of the preset stress ratio can be obtained after solution.

[0069] Based on the second stress amplitude and the second mean stress, the maximum equivalent stress can be directly obtained.

[0070] Furthermore, the maximum equivalent stress is obtained according to the following formula:

[0071] σ m2 +σ a2 =σ max,R ;

[0072] where, σ max,R is the maximum equivalent stress.

[0073] Specifically, the maximum equivalent stress is the sum of the second stress amplitude and the second mean stress. Since both the second stress amplitude and the second mean stress meet the requirements of the preset stress ratio, by summing the second stress amplitude and the second mean stress, the maximum equivalent stress that meets the requirements of the preset stress ratio can be obtained. When calculating with another rotational speed cycle subsequently, the final calculation results can be unified, facilitating substitution in the calculation.

[0074] Based on the maximum equivalent stress and in combination with the stress-life curve model, a fatigue damage conversion coefficient is obtained. After obtaining the maximum equivalent stress that meets the requirements of the preset stress ratio, by substituting it into the stress-life curve model, the fatigue damage conversion coefficient corresponding to the selected rotational speed cycle can be obtained.

[0075] In some specific embodiments of the present invention, based on the maximum equivalent stress and in combination with the stress-life curve model, a fatigue damage conversion coefficient is obtained, which specifically includes the following steps:

[0076] Obtain the material fatigue test data of the disk and fit the material fatigue test data to determine the parameters of the stress-life curve model. Before implementing the method for determining the fatigue life consumption of the aeroengine disk, a material fatigue test is pre-conducted on the disk, so that material fatigue test data such as the material type of the disk, test temperature, preset stress ratio, and stress concentration coefficient can be obtained. By fitting the material fatigue test data, the constant parameters of the stress-life curve model can be determined.

[0077] It should be noted that the above method for determining the constant parameters of the stress-life curve model is an existing method.

[0078] Based on the maximum equivalent stress and the parameters of the stress-life curve model, substitute them into the stress-life curve model to obtain the fatigue life of the disk under the actual working cycle. Substitute the obtained maximum equivalent stress corresponding to the selected rotational speed cycle and the determined constant parameters of the stress-life curve model into the existing stress-life curve model, and the fatigue life of the disk under the actual working cycle corresponding to the selected rotational speed cycle can be obtained.

[0079] Furthermore, the fatigue life of the disk under the actual working cycle is obtained according to the following formula:

[0080] lgN fi =A - B×lg(σ max,R - C).

[0081] Wherein, A, B, and C are all constant parameters, σ max,R is the maximum equivalent stress, and N fi is the fatigue life of the disk under the actual working cycle.

[0082] Specifically, after determining each constant parameter of the stress-life curve model, by substituting the maximum equivalent stress corresponding to the selected speed cycle, since the maximum equivalent stress meets the requirements of the preset stress ratio, the fatigue life of the disk under the actual working cycle corresponding to the selected speed cycle and meeting the requirements of the preset stress ratio can be obtained.

[0083] Based on the fatigue life of the disk under the actual working cycle and combined with the fatigue life of the disk under the standard working cycle, the fatigue damage conversion coefficient is obtained. Through the definition formula of the fatigue damage conversion coefficient, when the fatigue life of the disk under the actual working cycle corresponding to the selected speed cycle and the existing given fatigue life of the disk under the standard working cycle are obtained, the fatigue damage conversion coefficient corresponding to the selected speed cycle can be obtained.

[0084] Further, the fatigue damage conversion coefficient is obtained according to the following formula:

[0085]

[0086] where K i is the fatigue damage conversion coefficient, and N f is the fatigue life of the disk under the standard working cycle.

[0087] Specifically, the fatigue life of the disk under the standard working cycle is the existing given data, and the fatigue damage conversion coefficient is the ratio of the fatigue life of the disk under the standard working cycle to the fatigue life of the disk under the actual working cycle. Moreover, the fatigue damage conversion coefficient indicates that the fatigue life consumption generated by the disk experiencing 1 stress cycle of 0 - σ i - 0 can be equivalent to experiencing K i stress cycles of 0 - σ - 0.

[0088] Based on the fatigue damage conversion coefficient and combined with the speed cycle value corresponding to the speed cycle, the disk life consumption is obtained.

[0089] Among them, based on the fatigue damage conversion coefficient and combined with the speed cycle value corresponding to the speed cycle, obtaining the disk life consumption specifically includes the following steps:

[0090] Statistically analyze the measured speed spectrum data of the disk to obtain the number of occurrences corresponding to the speed cycle. By using the rain flow method to statistically analyze the measured speed spectrum data of the disk, all speed cycles of the engine under the actual working cycle and the number of occurrences corresponding to the speed cycle can be obtained. Substitute the maximum speed and minimum speed of each speed cycle under the actual working cycle into the above each formula in turn, so that multiple fatigue damage conversion coefficients corresponding to each speed cycle can be obtained.

[0091] Obtain the disk life consumption based on the fatigue damage conversion coefficient and the number of cycles experienced. According to the definition of fatigue life consumption, calculate the multiple fatigue damage conversion coefficients corresponding to each speed cycle and the number of cycles experienced corresponding to the speed cycle, and the disk life consumption can be obtained. A connection is established between the disk life consumption and the speed cycle. Without relying on the given speed cycle range and the corresponding fatigue damage conversion coefficient, even if a speed cycle outside the given speed cycle range appears during actual operation, the fatigue damage conversion coefficient corresponding to the speed cycle can be obtained through the measured speed cycle, and then the determination of the corresponding disk life consumption can be realized. At the same time, since the determination of the disk life consumption is no longer affected by the given speed cycle range and the corresponding fatigue damage conversion coefficient, the accuracy of the further obtained corresponding disk life consumption can be guaranteed, which is convenient for reducing the maintenance cycle of the engine and improving the economy of engine use.

[0092] In some specific embodiments of the present invention, the disk life consumption is obtained according to the following formula:

[0093] ΔN f =∑(n i ×K i ).

[0094] Wherein, ΔN f is the disk life consumption, n i is the number of cycles experienced, and K i is the fatigue damage conversion coefficient.

[0095] Based on the maximum speed and the minimum speed, the fatigue damage conversion coefficient is obtained according to the following formula:

[0096]

[0097] Wherein, N is the disk speed under the standard working cycle, σ is the stress corresponding to the disk speed under the standard working cycle, N f is the disk fatigue life under the standard working cycle, R is the preset stress ratio, σ b is the material strength of the disk, N max,i is the maximum speed, and N min,i is the minimum speed.

[0098] Specifically, by combining the above multiple formulas, a formula is formed that directly indicates the relationship between the maximum speed and the minimum speed and the fatigue damage conversion coefficient. When any speed cycle is selected, the fatigue damage conversion coefficient corresponding to the selected speed cycle can be directly obtained by substituting the maximum speed and the minimum speed in the speed cycle into this formula, thereby establishing a direct connection between the wheel life consumption and the actual speed of the speed cycle. Even if a speed cycle that exceeds the given speed cycle range occurs in actual operation, the wheel life consumption corresponding to the speed cycle can be obtained through the measured maximum speed and minimum speed of the speed cycle. At the same time, the determination of the wheel life consumption is no longer affected by the given speed cycle range and the corresponding fatigue damage conversion coefficient, which can ensure the accuracy of the obtained wheel life consumption, facilitate reducing the engine maintenance cycle, and improve the economy of engine use.

[0099] The present invention also provides an electronic device, characterized in that it includes: at least one processor and at least one memory, and the memory is data-connected with the processor. The memory stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor, so that at least one processor can execute the method for determining the fatigue life consumption of the aircraft engine wheel described in any of the above-mentioned specific embodiments. The method for determining the fatigue life consumption of the aircraft engine wheel that can establish a direct connection between the wheel life consumption and the actual speed of the speed cycle can be executed. Even if a speed cycle that exceeds the given speed cycle range occurs in actual operation, the wheel life consumption corresponding to the speed cycle can be obtained through the maximum speed and minimum speed of the speed cycle measured. At the same time, the determination of the wheel life consumption is no longer affected by the given speed cycle range and the corresponding fatigue damage conversion coefficient, and the accuracy of the obtained wheel life consumption can be guaranteed, which is convenient for reducing the maintenance cycle of the engine and improving the economy of the engine use.

[0100] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining fatigue life consumption of an aircraft engine disk, characterized in that: The following steps are involved: Measuring any speed cycle of the wheel disc, and obtaining corresponding peak stress and valley stress based on the speed cycle; Based on the peak stress and the valley stress, combined with a preset stress ratio of the wheel disc and the material strength of the wheel disc, a maximum equivalent stress is obtained; Based on the maximum equivalent stress and in combination with a stress-life curve model, a fatigue damage conversion factor is obtained; Based on the fatigue damage conversion coefficient and in combination with a speed cycle value corresponding to the speed cycle, the life consumption of the wheel disc is obtained.

2. The method for determining fatigue life consumption of an aircraft engine disk according to claim 1, characterized in that: The measuring wheel disc is subjected to any rotation speed cycle, and based on the rotation speed cycle, the corresponding peak stress and valley stress are obtained, comprising the following steps: Measuring any of the speed cycles of the wheel disc, and obtaining the maximum speed and the minimum speed corresponding to the speed cycle; Based on the maximum rotation speed and the minimum rotation speed, the corresponding peak stress and the valley stress are acquired.

3. The method for determining fatigue life consumption of an aircraft engine disk according to claim 2, characterized in that: The peak stress and the valley stress are obtained according to the following formula: Where N is the wheel speed under the standard working cycle, σ is the stress corresponding to the wheel speed under the standard working cycle, N i is the wheel speed under the actual working cycle, σ i is the stress corresponding to the wheel speed under the actual working cycle.

4. The method for determining fatigue life consumption of an aircraft engine disk according to claim 1, characterized in that: The step of obtaining the maximum equivalent stress based on the peak stress and the valley stress in combination with the preset stress ratio of the wheel disc and the material strength of the wheel disc comprises the following steps: Based on the peak stress and the valley stress, obtaining a corresponding first stress amplitude and a first average stress; Based on the first stress amplitude and the first average stress, in combination with a preset stress ratio of the wheel disc and a material strength of the wheel disc, a second stress amplitude and a second average stress limited by a preset stress ratio are obtained; The maximum equivalent stress is obtained based on the second stress amplitude and the second average stress.

5. The method for determining fatigue life consumption of an aircraft engine disk according to claim 4, characterized in that: The second stress amplitude and the second average stress are obtained according to the following formula: Among them, σ a1 is the first stress amplitude, σ m1 is the first average stress, R is the preset stress ratio, σ b is the material strength of the wheel disc, σ a2 is the second stress amplitude, σ m2 is the second mean stress; The maximum equivalent stress is obtained according to the following formula: s m2 +s a2 =s max,R ; Among them, σ max,R is the maximum equivalent stress.

6. The method for determining fatigue life consumption of an aircraft engine disk according to claim 1, characterized in that: The method of obtaining a fatigue damage conversion factor based on the maximum equivalent stress and in combination with a stress-life curve model comprises the following steps: Obtaining material fatigue test data of the wheel disc, and fitting the material fatigue test data to determine parameters of the stress-life curve model; Based on the maximum equivalent stress and the parameters of the stress-life curve model, the stress-life curve model is substituted to obtain the fatigue life of the wheel disc under the actual working cycle; Based on the fatigue life of the wheel disc under the actual working cycle and in combination with the fatigue life of the wheel disc under the standard working cycle, a fatigue damage conversion coefficient is obtained.

7. The method for determining fatigue life consumption of an aircraft engine disk according to claim 7, characterized in that: The fatigue life of the wheel under the actual working cycle is obtained according to the following formula: lgN fi =AB×lg(σ max,R -C); Among them, A, B and C are constant parameters, σ max,R is the maximum equivalent stress, N fi is the fatigue life of the wheel under the actual working cycle; The fatigue damage conversion factor is obtained according to the following formula: Among them, K i is the fatigue damage conversion factor, N f is the fatigue life of the wheel under the standard working cycle.

8. The method for determining fatigue life consumption of an aircraft engine disk according to claim 2, characterized in that: The method of obtaining the life consumption of the wheel disc based on the fatigue damage conversion coefficient and combining the speed cycle value corresponding to the speed cycle comprises the following steps: Counting the measured speed spectrum data of the wheel disc to obtain the number of experiences corresponding to the speed cycle; Based on the fatigue damage conversion coefficient and the number of experiences, the life consumption of the wheel disc is obtained.

9. The method for determining fatigue life consumption of an aircraft engine disk according to claim 9, characterized in that: The roulette life consumption is obtained according to the following formula: ΔN f =∑(n i ×K i ); Among them, ΔN f is the life consumption of the roulette wheel, n i is the number of experiences, K i is the fatigue damage conversion factor; Based on the maximum speed and the minimum speed, the fatigue damage conversion factor is obtained according to the following formula: Where N is the wheel speed under the standard working cycle, σ is the stress corresponding to the wheel speed under the standard working cycle, N f is the fatigue life of the wheel under the standard working cycle, R is the preset stress ratio, σ b is the material strength of the wheel disc, N max,i is the maximum speed, N min,i is the minimum speed.

10. An electronic device, characterized in that: include: at least one processor and at least one memory, the memory being data-connected to the processor; The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors so that the at least one processor can execute the method for determining fatigue life consumption of an aircraft engine disk as described in any one of claims 1 to 9.

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