A cup-shaped locking ring locking structure design method and system

Abstract

The present invention belongs to the field of aero-engines, relates to aero-engine transmission and support system design technology, and provides a cup-shaped lock ring locking structure design method and system, the method comprising: designing an initial cup-shaped lock ring and an initial nut, obtaining the initial material and initial structural parameters of the initial cup-shaped lock ring and the initial structural parameters of the nut locking groove on the initial nut; using a finite element simulation method, performing a static strength assessment on the initial cup-shaped lock ring based on the initial material and material yield strength, and correcting the initial cup-shaped lock ring until a cup-shaped lock ring that meets the material yield strength is obtained; calculating the vibration stress reserve of the cup-shaped lock ring, and correcting the initial structural parameters of the nut locking groove based on the vibration stress reserve until the oil-through lock ring and nut locking groove structural parameters that meet the vibration stress reserve are obtained. By using the cup-shaped lock ring locking structure designed by the present invention, a locking groove structure that meets the strength requirements can be obtained, thereby improving the reliability and service life of the structure.

Description

Technical Field

[0001] The present invention belongs to the field of aero-engines, relates to aero-engine transmission and support system design technology, and specifically relates to a cup-shaped locking ring locking structure design method and system. Background Art

[0002] The design of aircraft engine transmission and support systems requires position limiting and anti-rotation features for the inner and outer bearing rings. The inner ring, in particular, is typically secured with a nut. To prevent the nut from loosening during operation, a dedicated anti-loosening mechanism is also required. With the continuous advancement of aircraft engine technology, the weight and space requirements of transmission and support structures are increasing. While maintaining structural performance, the locking mechanism must occupy as little space as possible and be as lightweight as possible.

[0003] The cup-shaped lock ring locking structure generally consists of a nut, a cup-shaped lock ring, a bearing, and a shaft. First, the inner ring of the bearing is installed on the shaft, and then the cup-shaped lock ring and the nut are installed in sequence so that the cup-shaped lock ring cooperates with the groove of the shaft through the inner boss to prevent itself from rotating. Finally, the lock cup is deformed to embed into the locking groove of the nut to prevent the nut from rotating.

[0004] Currently, there is no method to determine the depth and radius of the cup-shaped lock ring locking structure after the lock ring is deformed and embedded in the nut locking groove, making it difficult to accurately evaluate the strength of the cup-shaped lock ring locking structure. Summary of the Invention

[0005] In order to solve the technical problem of difficulty in determining the depth and radius of the cup-shaped lock ring embedded in the nut after deformation of the lock ring of the lock ring structure, which makes it difficult to accurately evaluate the structural strength, the present invention discloses a cup-shaped lock ring locking structure design method, which includes the following steps:

[0006] S1. Designing an initial cup-shaped lock ring and an initial nut according to engine design requirements, obtaining initial material and initial structural parameters of the initial cup-shaped lock ring, and initial structural parameters of the nut locking groove on the initial nut;

[0007] S2. Performing a static strength assessment on the initial cup-shaped lock ring based on the initial material and the material yield strength using a finite element simulation method, and modifying the initial cup-shaped lock ring based on the static strength assessment result until a cup-shaped lock ring that meets the material yield strength is obtained;

[0008] S3. Obtain the vibration stress reserve of the cup-shaped lock ring through a finite element simulation method, and modify the initial structural parameters of the nut locking groove according to the vibration stress reserve until the nut locking groove structural parameters that meet the vibration stress reserve are obtained.

[0009] Furthermore, in the above step S2, the static strength evaluation of the initial cup-shaped lock ring is performed based on the initial material and the material yield strength by a finite element simulation method, including:

[0010] S21. Obtaining the stress at the lock cup of the initial cup-shaped lock ring at the operating speed by a finite element simulation method;

[0011] S22. When the stress at the lock cup is less than the material yield strength, it is determined that the initial material of the cup-shaped lock ring and the initial structural parameters of the lock ring meet the design requirements;

[0012] S23. When the stress at the lock cup is greater than or equal to the material yield strength, it is determined that the initial material of the cup-shaped lock ring and the initial structural parameters of the lock ring do not meet the design requirements.

[0013] Furthermore, in the above step S23, the cup-shaped lock ring is modified by changing the initial material and / or initial structural parameters of the cup-shaped lock ring, wherein the initial structural parameters of the cup-shaped lock ring include the thickness of the lock ring.

[0014] Furthermore, in the above step S3, the vibration stress reserve of the cup-shaped lock ring is obtained by a finite element simulation method, including:

[0015] S31, determining the deformation depth and deformation radius of the cup-shaped lock ring according to the initial structural parameters of the nut locking groove, and calculating the stress concentration factor of the lock ring after deformation according to the deformation depth and deformation radius;

[0016] S32, using a finite element elastic-plastic extrusion simulation method to obtain the residual stress of the cup-shaped lock ring at the deformation depth;

[0017] S33. Obtain, based on the material of the cup-shaped lock ring, a vibration stress reserve corresponding to the stress concentration factor of the lock ring after deformation by a difference method.

[0018] Furthermore, in the above step S31, according to the formula kt=1+2*(d / r) 1 / 2 Calculate the stress concentration factor of the cup lock ring after deformation, where kt is the stress concentration factor, d is the deformation depth, and r is the deformation radius.

[0019] Furthermore, in the above step S33, according to the material of the cup-shaped lock ring, the vibration stress reserve corresponding to the stress concentration factor after the lock ring is deformed is obtained by the difference method, including:

[0020] S331. Obtain the tensile strength and the high-cycle fatigue strength limit of the material of the cup-shaped lock ring from a material manual, and draw a first Goodman curve with a stress concentration factor of 1 and a second Goodman curve with a stress concentration factor of 3 based on the tensile strength and the high-cycle fatigue strength limit of the material;

[0021] S332. Draw a third Goodman curve corresponding to the stress concentration factor using an interpolation method based on the first Goodman curve and the second Goodman curve, and obtain an allowable vibration stress corresponding to the residual stress based on the third Goodman curve;

[0022] S333: Calculate the ratio of the allowable vibration stress to the given engine cup lock ring vibration stress load to obtain a vibration stress reserve.

[0023] Furthermore, in the above step S3, the initial structural parameters of the nut locking groove are modified according to the vibration stress reserve until the structural parameters of the nut locking groove that meet the vibration stress reserve are obtained, including:

[0024] S34. Compare the vibration stress reserve with a vibration stress reserve threshold; when the vibration stress reserve is less than or equal to the vibration stress reserve threshold, modify the initial structural parameters of the nut locking groove until the nut locking groove structural parameters satisfying the vibration stress reserve greater than the vibration stress reserve threshold are obtained.

[0025] An embodiment of the present invention also provides a cup-shaped lock ring locking structure design system, which includes an initial model design module, a static strength assessment module, a cup-shaped lock ring correction module, a dynamic strength assessment module and a nut locking groove correction module.

[0026] The initial model design module is used to design an initial cup-shaped lock ring and an initial nut according to engine design requirements, and obtain the initial material and initial structural parameters of the initial cup-shaped lock ring and the initial structural parameters of the nut locking groove on the initial nut;

[0027] The static strength assessment module is used to perform a static strength assessment on the initial cup-shaped lock ring according to the initial material and the material yield strength by using a finite element simulation method;

[0028] The cup-shaped lock ring correction module is used to correct the initial cup-shaped lock ring according to the static strength evaluation result until a cup-shaped lock ring that meets the material yield strength is obtained;

[0029] The dynamic strength assessment module is used to obtain the vibration stress reserve of the cup-shaped lock ring through a finite element simulation method;

[0030] The nut locking groove correction module is used to correct the initial structural parameters of the nut locking groove according to the vibration stress reserve until the nut locking groove structural parameters that meet the vibration stress reserve are obtained.

[0031] Compared to the prior art, the at least one technical solution employed in the embodiments of this specification achieves at least the following beneficial effects: The present invention's cup-shaped lock ring locking structure design method first uses simulation to evaluate and modify the static strength of an initial cup-shaped lock ring design to obtain the cup-shaped lock ring; then, using simulation, it performs dynamic strength analysis on the cup-shaped lock ring to evaluate and modify the initial nut locking groove to obtain the final nut locking groove structure. This method addresses the lack of evaluation methods in existing cup-shaped lock ring structure designs. It can determine a locking groove structure (depth and radius) that meets strength requirements, thereby improving the reliability and service life of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 This is a flow chart of a method for designing a cup-shaped locking ring locking structure according to an embodiment of the present invention;

[0034] Figure 2 This is an architectural diagram of a cup-shaped lock ring locking structure design system disclosed in an embodiment of the present invention;

[0035] Among them, 201, initial model design module; 202, static strength assessment module; 203, cup lock ring correction module; 204, dynamic strength assessment module; 205, nut locking groove correction module. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features of the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0038] The embodiment of the present invention discloses a method for designing a cup-shaped locking ring locking structure, see Figure 1 As shown, the method includes the following steps:

[0039] S1. Designing an initial cup-shaped lock ring and an initial nut according to engine design requirements, obtaining initial material and initial structural parameters of the initial cup-shaped lock ring, and initial structural parameters of the nut locking groove on the initial nut;

[0040] S2. Performing a static strength assessment on the initial cup-shaped lock ring based on the initial material and the material yield strength using a finite element simulation method, and modifying the initial cup-shaped lock ring based on the static strength assessment result until a cup-shaped lock ring that meets the material yield strength is obtained;

[0041] S3. Obtain the vibration stress reserve of the cup-shaped lock ring through a finite element simulation method, and modify the initial structural parameters of the nut locking groove according to the vibration stress reserve until the nut locking groove structural parameters that meet the vibration stress reserve are obtained.

[0042] Furthermore, in the above step S1, the material and structure of the initial cup-shaped lock ring are determined according to the engine design requirements. For example, 0Cr18Ni9 is selected, and the material yield strength σ 0.2 It is 205MPa; the material and structure of the initial nut can be determined according to the material of the initial cup-shaped lock ring, among which the materials of the lock ring and the nut are the same, and the structure of the nut locking groove mainly determines the depth and radius of the groove, which determines the depth and radius of the deformation of the cup-shaped lock ring. The structure of the lock ring mainly determines the thickness of the lock ring.

[0043] Furthermore, in the above step S2, the static strength evaluation of the initial cup-shaped lock ring is performed based on the initial material and the material yield strength by a finite element simulation method, including:

[0044] S21. Obtaining the stress S at the lock cup of the initial cup-shaped lock ring at the operating speed by a finite element simulation method;

[0045] S22, when the stress S at the lock cup is less than the material yield strength σ 0.2 When determining whether the initial material of the cup-shaped lock ring and the initial structural parameters of the lock ring meet the design requirements;

[0046] S23, when the lock cup stress S≥ material yield strength σ 0.2 When the initial material of the cup-shaped lock ring and the initial structural parameters of the lock ring are judged to not meet the design requirements.

[0047] For example, when the diameter of the cup-shaped shrink ring is 40 mm and the operating speed is 10,000 r / min, the stress S at the lock cup can be obtained by finite element simulation. At this time, S<σ 0.2 , if the design requirements are met, subsequent dynamic strength analysis can be carried out.

[0048] Furthermore, in the above step S23, the cup-shaped lock ring is modified by changing the initial material and / or initial structural parameters of the cup-shaped lock ring, wherein the initial structural parameters of the cup-shaped lock ring include the thickness of the lock ring.

[0049] Furthermore, in the above step S3, the vibration stress reserve of the cup-shaped lock ring is obtained by a finite element simulation method, including:

[0050] S31, determining the deformation depth and deformation radius of the cup-shaped lock ring according to the initial structural parameters of the nut locking groove, and calculating the stress concentration coefficient of the lock ring after deformation according to the deformation depth and deformation radius; in specific implementation, the formula kt=1+2*(d / r) can be used. 1 / 2 Calculate the stress concentration factor of the deformed cup-shaped lock ring, where kt is the stress concentration factor, d is the deformation depth, and r is the deformation radius. For example, when the cup-shaped lock ring has a deformation depth of 2 mm and a deformation radius of 6 mm, the stress concentration factor for the structure can be calculated to be 2.15.

[0051] S32. Using a finite element elastic-plastic extrusion simulation method, obtain the residual stress S0 of the cup-shaped lock ring at the deformation depth. In a specific implementation, when the deformation depth is 2 mm, the simulation method can be used to calculate the residual stress S0 = 420 MPa.

[0052] S33. Obtain, based on the material of the cup-shaped lock ring, a vibration stress reserve corresponding to the stress concentration factor of the lock ring after deformation by a difference method.

[0053] Furthermore, in the above step S33, according to the material of the cup-shaped lock ring, the vibration stress reserve corresponding to the stress concentration factor after the lock ring is deformed is obtained by the difference method, including:

[0054] S331. According to the material of the cup-shaped lock ring, obtain the tensile strength and the high-cycle fatigue strength limit of the material from the material manual, and draw a first Goodman curve with a stress concentration factor of kt=1 and a second Goodman curve with a stress concentration factor of kt=3 according to the tensile strength and the high-cycle fatigue strength limit of the material.

[0055] S332: Based on the first Goodman curve and the second Goodman curve, draw a third Goodman curve corresponding to the stress concentration factor using an interpolation method, and obtain the residual stress according to the third Goodman curve. Corresponding allowable vibration stress .

[0056] After the first Goodman curve and the second Goodman curve are drawn, the maximum allowable vibration stress corresponding to the stress concentration factor after the lock ring is deformed can be calculated by interpolation method. ; Among them, the maximum allowable vibration stress for: .in, The high cycle fatigue strength limit of the material when kt is equal to 3 and the stress ratio R is -1 (check in the material manual); The high cycle fatigue strength limit of the material when kt is equal to 1 and the stress ratio R is -1;

[0057] According to the maximum allowable vibration stress The maximum static stress obtained by interpolation with the Goodman curve is taken as the tensile strength , through tensile strength The third Goodman curve corresponding to the stress concentration factor after the lock ring is deformed can be drawn. When the residual stress S0=420MPa, the allowable vibration stress can be obtained through the third Goodman curve. About 113Mpa.

[0058] S333. Calculate the allowable vibration stress With the given engine cup lock ring vibration stress load The ratio of the vibration stress reserve is obtained, which can be obtained by the formula Indicates that, among them, the engine cup lock ring vibration stress load The recommended value is generally 50MPa.

[0059] Furthermore, in the above step S3, the initial structural parameters of the nut locking groove are modified according to the vibration stress reserve until the structural parameters of the nut locking groove that meet the vibration stress reserve are obtained, including:

[0060] S34, compare the vibration stress reserve with the vibration stress reserve threshold. When the vibration stress reserve is less than or equal to the vibration stress reserve threshold, modify the initial structural parameters of the nut locking groove until the nut locking groove structural parameters satisfy the vibration stress reserve > vibration stress reserve threshold. In specific implementation, the vibration stress reserve threshold is generally ≥1.2. For example, when the allowable vibration stress is 113Mpa, When the value is 50 MPa, the calculated vibration stress reserve is 2.26 (>1.2), and the initial nut locking groove structure meets the design requirements and does not need to be modified.

[0061] The present invention's method for designing a cup-shaped locking ring structure first uses simulation to evaluate and modify the static strength of an initial cup-shaped locking ring. Then, dynamic strength analysis of the cup-shaped locking ring is performed using simulation to evaluate and modify the initial nut locking groove to obtain the final nut locking groove structure. This method addresses the lack of evaluation methods in existing cup-shaped locking ring structure designs. It can determine a locking groove structure (depth and radius) that meets strength requirements, thereby improving the reliability and service life of the structure.

[0062] Based on the same inventive concept, a cup-shaped lock ring locking structure design system is also provided in an embodiment of the present invention, as described in the following embodiments. Since the principle of solving the problem by the cup-shaped lock ring locking structure design system is similar to the cup-shaped lock ring locking structure design method disclosed in the above embodiments, the implementation of the cup-shaped lock ring locking structure design system can refer to the implementation of the cup-shaped lock ring locking structure design method, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0063] Figure 2 This is a structural block diagram of the cup-shaped lock ring locking structure design system disclosed in an embodiment of the present invention, such as Figure 2 As shown, the system includes an initial model design module 201, a static strength assessment module 202, a cup lock ring correction module 203, a dynamic strength assessment module 204 and a nut locking groove correction module 205. The structure is described below.

[0064] The initial model design module 201 is used to design an initial cup-shaped lock ring and an initial nut according to engine design requirements, and obtain the initial material and initial structural parameters of the initial cup-shaped lock ring and the initial structural parameters of the nut locking groove on the initial nut;

[0065] The static strength evaluation module 202 is used to perform a static strength evaluation on the initial cup-shaped lock ring according to the initial material and the material yield strength by using a finite element simulation method;

[0066] The cup-shaped lock ring correction module 203 is used to correct the initial cup-shaped lock ring according to the static strength evaluation result until a cup-shaped lock ring that meets the material yield strength is obtained;

[0067] The dynamic strength evaluation module 204 is used to obtain the vibration stress reserve of the cup-shaped lock ring through a finite element simulation method;

[0068] The nut locking groove correction module 205 is used to correct the initial structural parameters of the nut locking groove according to the vibration stress reserve until the nut locking groove structural parameters that meet the vibration stress reserve are obtained.

[0069] In this embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, any of the above-mentioned cup-shaped lock ring locking structure design methods is implemented.

[0070] Specifically, the computer device may be a computer terminal, a server or a similar computing device.

[0071] In this embodiment, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program for executing any of the above-mentioned cup-shaped lock ring locking structure design methods.

[0072] Specifically, computer-readable storage media include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer-readable storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable storage media does not include transitory media such as modulated data signals and carrier waves.

[0073] Obviously, those skilled in the art should understand that the various modules or steps of the above-mentioned embodiments of the present invention can be implemented using a general-purpose computing device, they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices. Alternatively, they can be implemented using program code executable by the computing device, so that they can be stored in a storage device and executed by the computing device. In some cases, the steps shown or described can be performed in a different order than herein, or they can be made into separate integrated circuit modules, or multiple modules or steps can be made into a single integrated circuit module for implementation. Thus, the embodiments of the present invention are not limited to any specific combination of hardware and software.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A method for designing a cup-shaped locking ring locking structure, characterized in that: include: Designing an initial cup-shaped lock ring and an initial nut according to engine design requirements, obtaining initial material and initial structural parameters of the initial cup-shaped lock ring and initial structural parameters of the nut locking groove on the initial nut; Performing a static strength assessment on the initial cup-shaped lock ring according to the initial material and the material yield strength through a finite element simulation method, and modifying the initial cup-shaped lock ring according to the static strength assessment result until a cup-shaped lock ring that meets the material yield strength is obtained; Obtaining the vibration stress reserve of the cup-shaped lock ring by a finite element simulation method, and correcting the initial structural parameters of the nut locking groove according to the vibration stress reserve until the nut locking groove structural parameters that meet the vibration stress reserve are obtained, including: determining the deformation depth and deformation radius of the cup-shaped lock ring according to the initial structural parameters of the nut locking groove, and calculating the stress concentration coefficient of the lock ring after deformation according to the deformation depth and the deformation radius; The finite element elastic-plastic extrusion simulation method is used to obtain the residual stress of the cup-shaped lock ring at the deformation depth; based on the material of the cup-shaped lock ring, the vibration stress reserve corresponding to the stress concentration coefficient after the lock ring is deformed is obtained by the difference method.

2. The method for designing a cup-shaped locking ring locking structure according to claim 1, characterized in that: The static strength of the initial cup-shaped lock ring is evaluated based on the initial material and the material yield strength by a finite element simulation method, including: By using a finite element simulation method, the stress at the lock cup of the initial cup-shaped lock ring at the working speed is obtained; When the stress at the lock cup is less than the material yield strength, it is determined that the initial material of the cup-shaped lock ring and the initial structural parameters of the lock ring meet the design requirements; When the stress at the lock cup is greater than or equal to the material yield strength, it is determined that the initial material of the cup-shaped lock ring and the initial structural parameters of the lock ring do not meet the design requirements.

3. The method for designing a cup-shaped locking ring locking structure according to claim 1 or 2, characterized in that: The cup-shaped locking ring is modified by changing the initial material and / or initial structural parameters of the cup-shaped locking ring, wherein the initial structural parameters of the cup-shaped locking ring include the thickness of the locking ring.

4. The method for designing a cup-shaped locking ring locking structure according to claim 1, characterized in that: According to the formula kt=1+2*(d / r) 1 / 2 Calculate the stress concentration factor of the cup lock ring after deformation, where kt is the stress concentration factor, d is the deformation depth, and r is the deformation radius.

5. The method for designing a cup-shaped locking ring locking structure according to claim 1, characterized in that: According to the material of the cup-shaped lock ring, the vibration stress reserve corresponding to the stress concentration factor after the lock ring is deformed is obtained by the difference method, including: According to the material of the cup-shaped lock ring, the tensile strength and the high-cycle fatigue strength limit of the material are obtained from the material manual, and a first Goodman curve with a stress concentration factor of 1 and a second Goodman curve with a stress concentration factor of 3 are drawn according to the tensile strength and the high-cycle fatigue strength limit of the material; According to the first Goodman curve and the second Goodman curve, an interpolation method is used to draw a third Goodman curve corresponding to the stress concentration factor, and an allowable vibration stress corresponding to the residual stress is obtained according to the third Goodman curve; The ratio of the allowable vibration stress to a given engine cup lock ring vibration stress load is calculated to obtain a vibration stress reserve.

6. The method for designing a cup-shaped locking ring locking structure according to claim 1, characterized in that: Modifying the initial structural parameters of the nut locking groove according to the vibration stress reserve until the structural parameters of the nut locking groove that meet the vibration stress reserve are obtained, including: The vibration stress reserve is compared with a vibration stress reserve threshold. When the vibration stress reserve is less than or equal to the vibration stress reserve threshold, the initial structural parameters of the nut locking groove are modified until the nut locking groove structural parameters satisfying the vibration stress reserve greater than the vibration stress reserve threshold are obtained.

7. A cup-shaped locking ring locking structure design system, characterized in that: include: An initial model design module, the initial model design module is used to design an initial cup-shaped lock ring and an initial nut according to engine design requirements, and obtain initial materials and initial structural parameters of the initial cup-shaped lock ring and initial structural parameters of the nut locking groove on the initial nut; a static strength evaluation module, configured to perform a static strength evaluation on the initial cup-shaped lock ring based on the initial material and the material yield strength by using a finite element simulation method; a cup-shaped lock ring correction module, the cup-shaped lock ring correction module being used to correct the initial cup-shaped lock ring according to the static strength evaluation result until a cup-shaped lock ring that meets the material yield strength is obtained; a dynamic strength evaluation module, the dynamic strength evaluation module being configured to obtain a vibration stress reserve of the cup-shaped lock ring by using a finite element simulation method; A nut locking groove correction module, the nut locking groove correction module is used to correct the initial structural parameters of the nut locking groove according to the vibration stress reserve until the nut locking groove structural parameters that meet the vibration stress reserve are obtained, including: determining the deformation depth and deformation radius of the cup-shaped lock ring according to the initial structural parameters of the nut locking groove, and calculating the stress concentration coefficient of the lock ring after deformation according to the deformation depth and deformation radius; The finite element elastic-plastic extrusion simulation method is used to obtain the residual stress of the cup-shaped lock ring at the deformation depth; based on the material of the cup-shaped lock ring, the vibration stress reserve corresponding to the stress concentration coefficient after the lock ring is deformed is obtained by the difference method.

Images