Method, system, device and medium for acquiring interference assembly parameters of large-diameter cylindrical part

Abstract

The application provides a method, system, device and medium for obtaining interference assembly parameters of large-diameter cylindrical parts. The method is based on the actual parameters of the contained part and the contained part, a three-dimensional finite element simulation model is established, and the stress-interference amount relationship of the contact surface of the contained part and the contained part is obtained. Through finite element simulation, the complex stress state of the large-diameter cylindrical part under interference fit can be accurately simulated, and the shortcomings of traditional analytical formulas in geometric nonlinearity and contact nonlinearity are overcome. The method obtains the support force of the contact surface of the contained part and the contained part based on the stress-interference amount relationship, and obtains the total friction force of the contact surface based on the support force. The total friction force is converted into a transmissible torque, and the minimum value of the interference amount of the contained part and the contained part is obtained based on the transmissible torque. The maximum value of the interference amount of the contained part and the contained part is obtained based on the stress-interference amount relationship. The interference assembly parameters of the cylindrical part are located between the minimum value of the interference amount and the maximum value of the interference amount. The method checks the torque and the strength, clearly gives the safety interval of the interference amount, and avoids the risk of assembly failure from the design source.

Description

Technical Field

[0001] This invention belongs to the technical field, specifically relating to a method, system, equipment, and medium for obtaining interference fit parameters of large-diameter cylindrical parts. Background Technology

[0002] In core industrial sectors such as high-end equipment manufacturing, new energy, and chemical pressure vessels, large-diameter cylindrical components are fundamental parts for equipment load-bearing, power transmission, and closed operation, such as wind turbine flanges, large pressure vessel sections, and electrolytic copper foil cathode rollers. These components generally employ interference fit assembly to achieve rigid connections between shafts and cylinders, and flanges and sections. Torque and axial loads are transmitted by the radial contact pressure generated at the contact surfaces after assembly. The quality of the interference fit assembly directly determines the overall operational stability, service life, and production safety of the machine, making it an indispensable key forming process in the entire process of large-scale machinery manufacturing.

[0003] Currently, the design of interference fit processes for large-diameter cylindrical components still follows the traditional design system. Core process parameters such as interference fit, assembly pressure, and heating temperature are mainly calculated using industry-empirical formulas or simplified mechanical models of classic thick-walled cylinders. These traditional calculation methods are mostly based on the ideal linear elasticity assumptions of small-sized standard cylindrical components, neglecting the multiple nonlinear effects brought about by the structure of large-diameter components themselves. On the one hand, the wall thickness of large-sized cylinders is relatively small compared to their diameter, making them prone to significant radial deformation and overall structural bending after assembly, resulting in nonlinear geometric effects that cannot be ignored. On the other hand, under heavy-load assembly conditions, local stress in the cylinder wall easily exceeds the material's elastic limit, causing nonlinear material deformation. Simultaneously, the contact area and friction coefficient change in real time throughout the assembly process, further exacerbating calculation errors due to contact nonlinearity.

[0004] Insufficient accuracy in process parameter calculations directly leads to two typical assembly failure problems, hindering the yield rate of high-end large component manufacturing. Firstly, to avoid the risk of assembly cracking, process designers often select excessively small interference fits. This results in insufficient clamping force on the contact surfaces after assembly. Under heavy-load operation and alternating loads, the mating surfaces are prone to circumferential relative slippage, significantly reducing the transmission accuracy of components, accelerating contact surface wear, directly shortening the equipment's service life, and affecting the continuous and stable operation of wind power equipment and copper foil production equipment. Secondly, blindly increasing the interference fit to ensure connection reliability can cause local stress in the enclosure to far exceed the material's yield strength, leading to irreversible plastic deformation. In severe cases, this can directly cause structural scrapping problems such as cylinder cracking and flange chipping, not only increasing production costs but also delaying the overall production schedule.

[0005] In summary, traditional empirical and idealized parameter calculation methods are no longer adequate for the high-precision and high-reliability assembly production requirements of large-diameter cylindrical parts. Therefore, this application aims to provide a precise, efficient, and quantifiable method for determining the key parameters of interference fits in large-diameter cylindrical parts. Summary of the Invention

[0006] To address the problems of conservative parameter design, large calculation deviations, and uncontrollable assembly failure risks in the assembly of large-diameter cylindrical parts in existing technologies, this invention provides a method, system, equipment, and medium for obtaining interference fit assembly parameters for large-diameter cylindrical parts.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] In a first aspect, embodiments of this disclosure provide a method for obtaining interference fit parameters for large-diameter cylindrical parts, comprising the following steps:

[0009] Step S1: Based on the actual parameters of the enclosing component and the enclosed component, establish a three-dimensional finite element simulation model and obtain the stress-interference relationship of the contact surface between the enclosing component and the enclosed component.

[0010] Step S2: Based on the stress-interference relationship, obtain the supporting force of the contact surface between the enclosing part and the enclosed part, and obtain the total frictional force of the contact surface based on the supporting force;

[0011] Step S3: Convert the total friction force into a transmittable torque, and obtain the minimum interference between the enclosing part and the enclosed part based on the transmittable torque. Obtain the maximum interference between the enclosing part and the enclosed part based on the stress-interference relationship. The interference assembly parameters of the cylindrical part are located between the minimum interference and the maximum interference.

[0012] Furthermore, obtaining the stress-interference relationship includes the following steps:

[0013] Step A1: Establish a three-dimensional finite element model of the interference fit of a large-diameter cylindrical part, including the enclosing component and the enclosed component, in a multiphysics simulation model.

[0014] Step A2: In the three-dimensional finite element model, define the material constitutive models of the enclosing component and the enclosed component respectively, and input the actual parameters;

[0015] Step A3: In the three-dimensional finite element model, define a surface-to-surface contact between the contact surfaces of the containing part and the contained part, and set the friction coefficient of the surface-to-surface contact.

[0016] Step A4: In the three-dimensional finite element model, constraints are applied according to the actual assembly conditions, and different preset interference amounts are simulated on the contact surface using the temperature field method, displacement method, or direct interference contact method. The interference fit at each preset value is obtained by solving nonlinear statics. Below, the normal contact stress distribution on the contact surface between the enclosing member and the enclosed member. ,in, These are the position coordinates along the contact surface;

[0017] Step A5: For each preset interference amount Corresponding contact stress distribution Post-processing is performed to extract key data, and data fitting is performed on the key data to obtain the descriptive interference. Characterizing contact stress The function curve representing the relationship between them is used as the stress-interference relationship: .

[0018] Furthermore, the constitutive model of the material includes at least linear elasticity and / or elastoplasticity;

[0019] The actual parameters include at least the elastic modulus, Poisson's ratio, yield strength, and / or hardening curve;

[0020] The key data includes at least the maximum contact stress, the average contact stress, or the stress at a specific location.

[0021] Furthermore, when obtaining the support force, for any interference fit... The corresponding contact stress distribution is The supporting force over the entire contact area is calculated through numerical integration. ,include:

[0022] ;

[0023] In the formula, Differential area element.

[0024] Furthermore, the total frictional force ,include:

[0025] ;

[0026] In the formula, The coefficient of friction between the contact surfaces.

[0027] Furthermore, the transmittable torque includes:

[0028] ;

[0029] In the formula, is the average radius of the mating surfaces.

[0030] Furthermore, after obtaining the minimum interference fit between the enclosing component and the enclosed component, the minimum design torque value that needs to be overcome is determined based on the functional requirements of the assembly. , obtain Corresponding interference And as the minimum value of the interference. ;

[0031] When the maximum interference fit between the enclosing and enclosed parts is obtained, the strength condition is constructed. Find the strength condition in the stress-interference relationship. The corresponding contact stress and will meet the strength requirements The corresponding contact stress Corresponding interference As the minimum value of interference Among them, strength conditions , In the formula, The yield strength of the containment material, As a preset safety factor, .

[0032] In a second aspect, embodiments of this disclosure provide a system for obtaining interference fit parameters for large-diameter cylindrical parts, comprising:

[0033] The preprocessing unit is configured to establish a three-dimensional finite element simulation model based on the actual parameters of the enclosing component and the enclosed component, and obtain the stress-interference relationship at the contact surface between the enclosing component and the enclosed component.

[0034] The initialization unit is configured to obtain the support force of the contact surface between the enclosing member and the enclosed member based on the stress-interference relationship, and to obtain the total friction force of the contact surface based on the support force;

[0035] The output unit is configured to convert the total frictional force into a transmittable torque, and obtain the minimum interference of the enclosing part and the enclosed part based on the transmittable torque, and obtain the maximum interference of the enclosing part and the enclosed part based on the stress-interference relationship, with the interference assembly parameters of the cylindrical part located between the minimum interference and the maximum interference.

[0036] In a third aspect, embodiments of this disclosure provide an electronic device, characterized in that the electronic device comprises:

[0037] At least one processor; and,

[0038] The memory is communicatively connected to the at least one processor; wherein,

[0039] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method for obtaining interference fit parameters for large-diameter cylindrical parts.

[0040] In a fourth aspect, embodiments of this disclosure provide a non-transitory computer-readable storage medium, characterized in that the non-transitory computer-readable storage medium stores computer instructions for causing the computer to execute the method for obtaining interference fit parameters of a large-diameter cylindrical part.

[0041] Compared with the prior art, the present invention has the following beneficial technical effects:

[0042] This invention provides a method, system, equipment, and medium for obtaining interference fit parameters of large-diameter cylindrical components. The method establishes a three-dimensional finite element simulation model based on the actual parameters of the enclosing and contained components, and obtains the stress-interference relationship at the contact surface between the enclosing and contained components. Through finite element simulation, it can accurately simulate the complex stress state under interference fit of large-diameter cylindrical components, overcoming the shortcomings of traditional analytical formulas in geometric nonlinearity and contact nonlinearity. Based on the stress-interference relationship, this method obtains the supporting force at the contact surface between the enclosing and contained components, and obtains the total friction force based on the supporting force. The total friction force is converted into a transmittable torque, and the minimum interference fit between the enclosing and contained components is obtained based on the transmittable torque. The maximum interference fit between the enclosing and contained components is obtained based on the stress-interference relationship. The interference fit parameters of the cylindrical component lie between the minimum and maximum interference fit values. This method, through dual verification of torque and strength, clearly defines the safe range of interference fit, avoiding the risk of assembly failure from the design stage. By combining finite element simulation and mechanical calculations, it achieves accurate and rapid selection of interference fit, ensuring that the assembly meets both torque transmission requirements and structural strength safety. This method is applicable to large-diameter cylindrical components of different materials and sizes, and has good scalability and engineering applicability. Attached Figure Description

[0043] Figure 1 A flowchart illustrating a method for obtaining interference fit parameters for a large-diameter cylindrical component according to an embodiment of this disclosure is shown.

[0044] Figure 2 The diagram shows the torque and friction force variations corresponding to different interference fits in embodiments of this disclosure.

[0045] Figure 3 The equivalent stress distribution cloud diagram corresponding to an interference fit of 0.6 mm in an embodiment of this disclosure is shown.

[0046] Figure 4 The equivalent stress distribution cloud diagram corresponding to an interference fit of 1.2 mm in an embodiment of this disclosure is shown.

[0047] Figure 5 The equivalent stress distribution cloud diagram corresponding to an interference fit of 1.8 mm in an embodiment of this disclosure is shown.

[0048] Figure 6 The equivalent stress distribution cloud diagram corresponding to an interference fit of 2.4 mm in an embodiment of this disclosure is shown.

[0049] Figure 7 The equivalent stress distribution cloud diagram corresponding to an interference fit of 3.0 mm in an embodiment of this disclosure is shown.

[0050] Figure 8 The equivalent stress distribution cloud diagram corresponding to an interference fit of 3.6 mm in an embodiment of this disclosure is shown.

[0051] Figure 9 The equivalent stress distribution cloud diagram corresponding to an interference fit of 4.2 mm in an embodiment of this disclosure is shown.

[0052] Figure 10 The equivalent stress distribution cloud diagram corresponding to an interference fit of 4.8 mm in an embodiment of this disclosure is shown.

[0053] Figure 11 The equivalent stress distribution cloud diagram corresponding to an interference fit of 5.4 mm in an embodiment of this disclosure is shown.

[0054] Figure 12 The equivalent stress distribution cloud diagram corresponding to an interference fit of 6.0 mm in an embodiment of this disclosure is shown.

[0055] Figure 13 A diagram of an apparatus for obtaining interference fit parameters for a large-diameter cylindrical component, according to an embodiment of the present disclosure, is shown. Detailed Implementation

[0056] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0057] Figure 1 A flowchart 100 of a method for obtaining interference fit parameters of a large-diameter cylindrical part according to a first embodiment of the present invention is shown. Figure 1 As shown, it includes the following steps:

[0058] In step S101, a three-dimensional finite element simulation model is established based on the actual parameters of the enclosing component and the enclosed component, and the stress-interference relationship of the contact surface between the enclosing component and the enclosed component is obtained.

[0059] Specifically, obtaining the stress-interference relationship includes the following steps:

[0060] Step A1: Establish a three-dimensional finite element model of the interference fit of a large-diameter cylindrical part, including the enclosing component and the enclosed component, in a multiphysics simulation model.

[0061] Step A2: In the three-dimensional finite element model, define the material constitutive models of the enclosing component and the enclosed component respectively, and input the actual parameters;

[0062] Step A3: In the three-dimensional finite element model, define a surface-to-surface contact between the contact surfaces of the containing part and the contained part, and set the friction coefficient of the surface-to-surface contact.

[0063] Step A4: In the three-dimensional finite element model, constraints are applied according to the actual assembly conditions, and different preset interference amounts are simulated on the contact surface using the temperature field method, displacement method, or direct interference contact method. The interference fit at each preset value is obtained by solving nonlinear statics. Below, the normal contact stress distribution on the contact surface between the enclosing member and the enclosed member. ,in, These are the position coordinates along the contact surface;

[0064] Step A5: For each preset interference amount Corresponding contact stress distribution Post-processing is performed to extract key data, and data fitting is performed on the key data to obtain the descriptive interference. Characterizing contact stress The function curve representing the relationship between them is used as the stress-interference relationship: ;

[0065] In this embodiment, the material constitutive model includes at least linear elasticity and / or elastoplasticity. The linear elastic model is suitable for low interference and global elastic deformation conditions. The elastoplastic model can simultaneously describe the elastic deformation and irreversible plastic flow after yielding of the material. It can restore the nonlinear behavior of local plastic strain and stress concentration of the containment component under large interference assembly, and meet the requirements of extreme assembly parameter analysis.

[0066] The actual parameters include at least the elastic modulus, Poisson's ratio, yield strength, and / or hardening curve;

[0067] The key data includes at least the maximum contact stress, the average contact stress, or the stress at a specific location.

[0068] It should be noted that in this embodiment, a three-dimensional finite element simulation model is established using multiphysics simulation software, specifically Comsol Multiphysics. In addition to the three-dimensional finite element simulation model, an axisymmetric model of interference fit for a large-diameter cylindrical component can also be constructed. The axisymmetric model utilizes the circumferential symmetry of the cylinder around its central axis. In Comsol Multiphysics, a two-dimensional section of revolution is used to replace the complete three-dimensional cylinder to build the interference fit finite element model.

[0069] Next, proceed to step S102.

[0070] In step S102, the supporting force of the contact surface between the enclosing member and the enclosed member is obtained based on the stress-interference relationship, and the total friction force of the contact surface is obtained based on the supporting force.

[0071] Specifically, when the support force is obtained, for any interference fit... The corresponding contact stress distribution is The supporting force over the entire contact area is calculated through numerical integration. ,include:

[0072] ;

[0073] In the formula, Differential area element.

[0074] Specifically, the total frictional force is obtained according to Coulomb's law of friction. ,include:

[0075] ;

[0076] In the formula, The coefficient of friction between the contact surfaces.

[0077] Next, proceed to step S103.

[0078] In step S103, the total friction force is converted into a transmittable torque, and the minimum interference of the enclosing part and the enclosed part is obtained based on the transmittable torque. The maximum interference of the enclosing part and the enclosed part is obtained based on the stress-interference relationship. The interference assembly parameters of the cylindrical part are located between the minimum interference and the maximum interference.

[0079] Specifically, the transmittable torque includes:

[0080] ;

[0081] In the formula, is the average radius of the mating surfaces.

[0082] Furthermore, after obtaining the minimum interference fit between the enclosing component and the enclosed component, the minimum design torque value that needs to be overcome is determined based on the functional requirements of the assembly. , obtain Corresponding interference And as the minimum value of the interference. ;

[0083] When the maximum interference fit between the enclosing and enclosed parts is obtained, the strength condition is constructed. Find the strength condition in the stress-interference relationship. The corresponding contact stress and will meet the strength requirements The corresponding maximum contact stress Corresponding interference As the maximum value of the over-excess amount Among them, strength conditions , In the formula, The yield strength of the containment material, As a preset safety factor, .

[0084] It should be noted that the final interference fit parameters The selection range should satisfy:

[0085] ;

[0086] This range ensures both connection reliability and structural safety.

[0087] This implementation also includes:

[0088] For large-diameter cylindrical parts with different material combinations (enclosing / enclosed parts) and different size series (diameter, wall thickness, fit length), repeat the key calculation process of steps S101-103. The calculation results are then summarized and organized to form a digital database indexed by key dimensions and materials. The database stores or generates a family of fitting curves for "interference fit-support force" under different working conditions, or directly provides correlation charts for "interference fit-allowable torque" and "interference fit-maximum stress of the enclosing part." In practical applications, process engineers can quickly and accurately determine the recommended value or range of interference fit that meets design requirements by querying the corresponding database or curves based on the specific material and dimensions of the parts to be assembled, without having to repeatedly perform complex simulation modeling.

[0089] This application provides one embodiment as follows:

[0090] In this embodiment, a cathode roller titanium cylinder is used as the containing part, the material of which is TA0, and the roller core is used as the contained part, the material of which is Q235, and interference fit is performed as an example.

[0091] In Comsol, an axisymmetric model is created, and the elastic-plastic parameters of the two materials are input. The friction coefficient μ is set to 0.6, the outer diameter of the titanium cylinder is 2700 mm, and the wall thickness is 10 mm.

[0092] The interference fit was set from 0.6mm to 6mm, and simulations were performed in 0.6mm intervals. A total of 10 sets of interference fit parameters were selected, such as... Figures 3-12 As shown, the pressure distribution on the contact surface and the maximum Mises stress of the gear ring under each interference fit are extracted.

[0093] By calculating the support force corresponding to each interference amount and torque The frictional force generated by the weight of the titanium cylinder determines the required transmitted working torque. =72 kN·m, find the minimum interference to satisfy this torque. .

[0094] Based on the yield strength of the titanium cylinder material (pure titanium TAO) MPa) and safety factor The maximum allowable stress was determined to be 121 MPa. Based on simulation results, when the interference fit... When the diameter is mm, the maximum Mises stress of the gear ring is approximately 124 MPa, therefore, we take... mm.

[0095] Therefore, the recommended interference fit range for this assembly is 0.6 mm to 3.6 mm.

[0096] The dimensions, material, and corresponding "interference fit-support force" fitting curve for this case are stored in the database. For parts of similar specifications, process engineers can directly query the database to quickly obtain the parameter range.

[0097] The second embodiment of the present invention also provides a system for obtaining interference fit parameters of large-diameter cylindrical parts, comprising:

[0098] The preprocessing unit is configured to establish a three-dimensional finite element simulation model based on the actual parameters of the enclosing component and the enclosed component, and obtain the stress-interference relationship at the contact surface between the enclosing component and the enclosed component.

[0099] The initialization unit is configured to obtain the support force of the contact surface between the enclosing member and the enclosed member based on the stress-interference relationship, and to obtain the total friction force of the contact surface based on the support force;

[0100] The output unit is configured to convert the total frictional force into a transmittable torque, and obtain the minimum interference of the enclosing part and the enclosed part based on the transmittable torque, and obtain the maximum interference of the enclosing part and the enclosed part based on the stress-interference relationship, with the interference assembly parameters of the cylindrical part located between the minimum interference and the maximum interference.

[0101] The third embodiment of the present invention also provides an electronic device, the electronic device comprising:

[0102] At least one processor; and,

[0103] The memory is communicatively connected to the at least one processor; wherein,

[0104] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of obtaining interference fit parameters for a large-diameter cylindrical part according to any of the foregoing embodiments.

[0105] The fourth embodiment of the present invention also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method for obtaining interference fit parameters of a large-diameter cylindrical part as described in any of the preceding embodiments.

[0106] The fifth embodiment of the present invention also provides a computer program product, which includes a computing program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the method of obtaining interference fit parameters for a large-diameter cylindrical part according to any of the foregoing embodiments.

[0107] Figure 13 The illustration shows a method or device 1000 implementing an embodiment of the present invention. In some embodiments, more or fewer devices may be included than illustrated. In some embodiments, it may be implemented using a single or multiple devices. In some embodiments, it may be implemented using cloud-based or distributed devices.

[0108] like Figure 13 As shown, device 1000 includes a processor 1001 for performing various appropriate operations and processes based on programs and / or data stored in read-only memory (ROM) 1002 or programs and / or data loaded from storage portion 1008 into random access memory (RAM) 1003. Processor 1001 may be a multi-core processor or may contain multiple processors. In some embodiments, processor 1001 may include a general-purpose main processor and one or more special coprocessors, such as a central processing unit (CPU), graphics processing unit (GPU), neural network processor (NPU), digital signal processor (DSP), etc. Various programs and data required for the operation of device 1000 are also stored in RAM 1003. Processor 1001, ROM 1002, and RAM 1003 are interconnected via bus 1004. Input / output (I / O) interface 1005 is also connected to bus 1004.

[0109] The processor and memory described above are used together to execute programs stored in the memory. When the program is executed by a computer, it can implement the methods, steps, or functions described in the above embodiments.

[0110] The following components are connected to I / O interface 1005: an input section 1006 including a keyboard, mouse, touchscreen, etc.; an output section 1007 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1008 including a hard disk, etc.; and a communication section 1009 including a network interface card such as a LAN card, modem, etc. The communication section 1009 performs communication processing via a network such as the Internet. A drive 1010 is also connected to I / O interface 1005 as needed. A removable medium 1011, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 1010 as needed so that computer programs read from it can be installed into storage section 1008 as needed. Figure 13 The diagram only shows a portion of the components and does not imply that the device 1000 only includes... Figure 13 The components shown.

[0111] The systems, devices, modules, or units described in the above embodiments can be implemented by a computer or its associated components. The computer may be, for example, a mobile terminal, smartphone, personal computer, laptop computer, in-vehicle human-machine interface device, personal digital assistant, media player, navigation device, game console, tablet computer, wearable device, smart TV, Internet of Things system, smart home, industrial computer, server, or a combination thereof.

[0112] Although not shown, in this embodiment of the invention, a computer-readable storage medium is provided having a computer program / instruction stored thereon, which, when executed by a processor, implements the method for obtaining interference fit parameters of a large-diameter cylindrical part as described in the embodiment.

[0113] Storage media in embodiments of the present invention include articles that are permanent and non-permanent, removable and non-removable, capable of storing information by any method or technology. Examples of 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 technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0114] Although not shown, embodiments of the present invention also provide a computer program product, including: a computer program / instructions that, when executed by a processor, implement the method for obtaining interference fit parameters of a large-diameter cylindrical part as described in the embodiments.

[0115] The methods, programs, systems, apparatuses, etc., in embodiments of the present invention can be executed or implemented in one or more networked computers, or practiced in a distributed computing environment. In the embodiments of this specification, in these distributed computing environments, tasks can be performed by remote processing devices connected via a communication network.

Claims

1. A method for obtaining interference fit parameters for large-diameter cylindrical parts, characterized in that, Includes the following steps: Step S1: Based on the actual parameters of the enclosing component and the enclosed component, establish a three-dimensional finite element simulation model and obtain the stress-interference relationship of the contact surface between the enclosing component and the enclosed component. Step S2: Based on the stress-interference relationship, obtain the supporting force of the contact surface between the enclosing part and the enclosed part, and obtain the total frictional force of the contact surface based on the supporting force; Step S3: Convert the total friction force into a transmittable torque, and obtain the minimum interference between the enclosing part and the enclosed part based on the transmittable torque. Obtain the maximum interference between the enclosing part and the enclosed part based on the stress-interference relationship. The interference assembly parameters of the cylindrical part are located between the minimum interference and the maximum interference.

2. The method for obtaining interference fit parameters for large-diameter cylindrical parts according to claim 1, characterized in that, The steps to obtain the stress-interference relationship include: Step A1: Establish a three-dimensional finite element model of the interference fit of a large-diameter cylindrical part, including the enclosing component and the enclosed component, in a multiphysics simulation model. Step A2: In the three-dimensional finite element model, define the material constitutive models of the enclosing component and the enclosed component respectively, and input the actual parameters; Step A3: In the three-dimensional finite element model, define a surface-to-surface contact between the contact surfaces of the containing part and the contained part, and set the friction coefficient of the surface-to-surface contact. Step A4: In the three-dimensional finite element model, constraints are applied according to the actual assembly conditions, and different preset interference amounts are simulated on the contact surface using the temperature field method, displacement method, or direct interference contact method. The interference fit at each preset value is obtained by solving nonlinear statics. Below, the normal contact stress distribution on the contact surface between the enclosing member and the enclosed member. ,in, These are the position coordinates along the contact surface; Step A5: For each preset interference amount Corresponding contact stress distribution Post-processing is performed to extract key data, and data fitting is performed on the key data to obtain the descriptive interference. Characterizing contact stress The function curve representing the relationship between them is used as the stress-interference relationship: .

3. The method for obtaining interference fit parameters for large-diameter cylindrical parts according to claim 2, characterized in that, The material constitutive model includes at least linear elasticity and / or elastoplasticity; The actual parameters include at least the elastic modulus, Poisson's ratio, yield strength, and / or hardening curve; The key data includes at least the maximum contact stress, the average contact stress, or the stress at a specific location.

4. The method for obtaining interference fit parameters for large-diameter cylindrical parts according to claim 2, characterized in that, When the support force is obtained, for any interference fit The corresponding contact stress distribution is The supporting force over the entire contact area is calculated through numerical integration. ,include: ； In the formula, Differential area element.

5. The method for obtaining interference fit parameters for large-diameter cylindrical parts according to claim 4, characterized in that, The total friction force ,include: ； In the formula, The coefficient of friction between the contact surfaces.

6. The method for obtaining interference fit parameters for large-diameter cylindrical parts according to claim 5, characterized in that, The transmittable torque includes: ； In the formula, is the average radius of the mating surfaces.

7. The method for obtaining interference fit parameters for large-diameter cylindrical parts according to claim 5, characterized in that, When the minimum interference fit between the enclosing and enclosed parts is obtained, the minimum design torque value that needs to be overcome is determined based on the functional requirements of the assembly. , obtain Corresponding interference And as the minimum value of the interference. ; When the maximum interference fit between the enclosing and enclosed parts is obtained, the strength condition is constructed. Find the strength condition in the stress-interference relationship. The corresponding contact stress and will meet the strength requirements The corresponding contact stress Corresponding interference As the minimum value of interference Among them, strength conditions , In the formula, The yield strength of the containment material, As a preset safety factor, .

8. A system for obtaining interference fit parameters for large-diameter cylindrical parts, characterized in that, The method for obtaining interference fit parameters for large-diameter cylindrical parts according to any one of claims 1-7 includes: The preprocessing unit is configured to establish a three-dimensional finite element simulation model based on the actual parameters of the enclosing component and the enclosed component, and obtain the stress-interference relationship at the contact surface between the enclosing component and the enclosed component. The initialization unit is configured to obtain the support force of the contact surface between the enclosing member and the enclosed member based on the stress-interference relationship, and to obtain the total friction force of the contact surface based on the support force; The output unit is configured to convert the total frictional force into a transmittable torque, and obtain the minimum interference of the enclosing part and the enclosed part based on the transmittable torque, and obtain the maximum interference of the enclosing part and the enclosed part based on the stress-interference relationship, with the interference assembly parameters of the cylindrical part located between the minimum interference and the maximum interference.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and, The memory is communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method for obtaining interference fit parameters of a large-diameter cylindrical part as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions for causing the computer to perform the method for obtaining interference fit parameters of a large-diameter cylindrical component as described in any one of claims 1 to 7.

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