Flange bolt connection layout optimization design method and related equipment

Abstract

The invention relates to the technical field of mechanical part design, and discloses a flange bolt connection layout optimization design method and related equipment.The method comprises the steps that flange basic parameters are obtained, and a rigidity calculation model is constructed based on the flange basic parameters; bolt margin parameters are determined through sealing surface pressure distribution based on a rigidity calculation model; bolt spacing parameters are determined through pressure distribution changes based on a rigidity calculation model; and performing parametric modeling and simulation checking on the determined bolt edge distance parameters and bolt spacing parameters by taking the pressure distribution change rate as a checking parameter to obtain a design result, and completing flange bolt connection layout optimization design through the design result. According to the method, discrete experience is upgraded into a continuous scientific model, the design reliability is remarkably improved, static strength design of a traditional empirical formula is replaced, and therefore the sealing reliability is remarkably improved, the method adapts to complex working conditions, and the design period is greatly shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical part design, in particular to a flange bolt connection layout optimization design method and related equipment. BACKGROUND

[0002] In the process industry fields of petrochemical, energy and power, nuclear power devices, etc., flange bolt connection as the core connection structure of pressure vessels and piping systems, its reliability is directly related to the safe operation and long-period stability of major equipment. Data shows that about 65% of the leakage accidents of pressure equipment are caused by flange sealing failure, and the technical limitations of the traditional bolt layout design method are one of the main causes. The current design mainly relies on the empirical formula and static strength checking criteria formulated by industry standards such as ASME B16.5 and GB / T 9124, which has the following limitations: 1) Design target and sealing requirement are out of touch: The existing design method focuses on the lower limit checking of bolt strength, ignoring the core index of sealing surface contact pressure distribution uniformity. When the number of designed bolts is small, the leakage risk will increase sharply; while excessive redundant design will cause material waste.

[0003] 2) Empirical formula lacks working condition adaptability: The manual recommended value does not establish a quantitative correlation mechanism for complex working conditions (high temperature creep, vibration relaxation). Material creep at high temperature will cause pre-tightening force attenuation, but the traditional layout scheme is not dynamically adjusted; the edge pressure bulge distortion caused by thermal-mechanical coupling deformation cannot be effectively inhibited by the standard spacing model.

[0004] 3) Low design efficiency and parameter fragmentation: Bolt size (diameter / number), edge distance, spacing, etc. are independently iterated and tried by manual, lacking a collaborative optimization model, and using finite element simulation method to verify the design reliability consumes huge computing resources; the current design method cannot construct an efficient mapping relationship between key variables such as pressure distribution radius and flange thickness and sealing performance, making it difficult to realize customized design of high-performance equipment.

[0005] Therefore, in order to further reasonably design the edge distance and spacing parameters of the bolt in the bolt flange connection structure, an urgent need exists for a design method that is different from the empirical parameters, combined with the analytical model and the finite element results. SUMMARY

[0006] In order to overcome the defects existing in the prior art, the purpose of the present application is to provide a flange bolt connection layout optimization design method and related equipment to solve the technical problem of how to improve the sealing design of the bolt flange.

[0007] The present application is realized by the following technical solutions: In a first aspect, the present application provides a flange bolt connection layout optimization design method, comprising: obtaining flange basic parameters, and constructing a stiffness calculation model based on the flange basic parameters; determining a bolt edge distance parameter based on the stiffness calculation model through a sealing surface pressure distribution; determining a bolt spacing parameter based on the stiffness calculation model through a pressure distribution change; parameterizing modeling and simulation checking the determined bolt edge distance parameter and bolt spacing parameter with a pressure distribution change rate as a checking parameter to obtain a design result, and completing flange bolt connection layout optimization design through the design result.

[0008] Preferably, the flange basic parameters include connected piece size parameters, connected piece material parameters, and bolt preliminary selection parameters.

[0009] Preferably, the stiffness calculation model includes bolt segmented series stiffness calculation and stiffness calculation based on a connected piece quartic function pressure distribution model; wherein the expression of the bolt segmented series stiffness calculation is as follows:

[0010] In the formula, is the stiffness of a single bolt; is the stiffness caused by elastic deformation of a threaded screwing part; In the stiffness calculation based on the connected piece quartic function pressure distribution model, the boundary conditions of the quartic radial pressure distribution function include a bolt hole edge stress gradient constraint and a flange contact surface maximum pressure point constraint.

[0011] Preferably, in the determination of the bolt edge distance parameter based on the stiffness calculation model through the sealing surface pressure distribution, the bolt edge distance parameter is determined by controlling the influence of edge effect on pressure distribution uniformity, wherein when the bolt is close to the flange edge, the pressure distribution presents an edge protrusion effect, and then a dimensionless edge distance is used to determine the bolt edge distance parameter, and the expression is as follows: Dimensionless edge distance = L ; wherein, is a distance of the bolt from the flange edge; is a bolt pressure distribution circle radius.

[0012] Preferably, in the determination of the bolt spacing parameter based on the stiffness calculation model through the pressure distribution change, a minimum bolt spacing angle satisfying a pressure change rate requirement is obtained through a multivariate linear regression model.

[0013] Preferably, the design result is automatically generated by a parameterized interface to simulate a model, extract a sealing surface pressure cloud diagram to calculate an actual pressure change rate, and output a design parameter when the actual pressure change rate meets a standard, the design parameter being a final design parameter; and when the actual pressure change rate exceeds or does not meet the standard, a conjugate gradient method is used to adjust a bolt edge margin or spacing and recheck.

[0014] In a second aspect, the present application further provides a flange bolt connection layout optimization design system, comprising: A model construction module is configured to acquire flange basic parameters and construct a stiffness calculation model based on the flange basic parameters. A first parameter determination module is configured to determine a bolt edge margin parameter based on the stiffness calculation model and a sealing surface pressure distribution. A second parameter determination module is configured to determine a bolt spacing parameter based on the stiffness calculation model and a pressure distribution change. A parameter simulation processing module is configured to perform parameterized modeling and simulation checking on the determined bolt edge margin parameter and bolt spacing parameter with a pressure distribution change rate as a checking parameter to obtain a design result, and complete flange bolt connection layout optimization design through the design result.

[0015] In a third aspect, the present application further provides a mobile terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the flange bolt connection layout optimization design method as described above when executing the computer program.

[0016] In a fourth aspect, the present application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program implements the steps of the flange bolt connection layout optimization design method as described above when executed by a processor.

[0017] In a fifth aspect, the present application further provides a computer program product, comprising computer instructions, wherein the computer instructions instruct a computing device to perform operations corresponding to the flange bolt connection layout optimization design method as described above.

[0018] Compared with the prior art, the present application has the following beneficial technical effects: The application provides a flange bolt connection layout optimization design method, which realizes breakthrough by constructing a design system with sealing performance as a core target: firstly, an accurate stiffness model is established, then a dimensionless edge distance optimization criterion driven by pressure distribution radius is proposed, and quantitative design of bolt spacing is realized by combining a multiple linear regression model, edge distance-parameter coordination is formed, and finally a closed-loop design link is formed through parameterized modeling, ensuring the sealing reliability of the layout scheme under complex working conditions. This method upgrades discrete experience to continuous scientific model, significantly improves design reliability, replaces the traditional static strength design of empirical formula, thereby significantly improves sealing reliability, adapts to complex working conditions and greatly compresses the design cycle. It is suitable for flange bolt connection structure design in process industries such as petroleum chemical industry, energy power and nuclear energy device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The flange bolt connection layout optimization design method flowchart in the embodiment of the application is shown. Figure 2 The flange bolt connection layout optimization design flowchart in the embodiment of the application is shown. Figure 3 The common bolt stiffness calculation model of the embodiment of the application is shown. Figure 4 The connected piece pressure distribution schematic diagram in the embodiment of the application is shown. Figure 5 The mapping relationship between the flange nominal inner diameter and the bolt spacing arc length in the embodiment of the application is shown. Figure 6 The flange bolt connection layout optimization design system principle schematic diagram in the embodiment of the application is shown. In the figure: 1, model construction module; 2, first parameter determination module; 3, second parameter determination module; 4, parameter simulation processing module. DETAILED DESCRIPTION

[0020] In order to enable personnel in the technical field to better understand the application scheme, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the application.

[0021] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the application and the above drawings, are used to distinguish between similar objects, and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the terms so-termed "first", "second", etc. can be interchanged, where appropriate, to refer to the same element in order to avoid repetition of the same terms in the description and the claims of the application. Furthermore, the terms "comprising", "having", "including" and "containing" and any variations thereof used in the specification and the claims are intended to cover the instance in which a process, method, system, product, or device contains an item listed in the specification or claims, but does not contain items not listed in the specification or claims. The terms "comprising", "having", "including" and "containing" and any variations thereof are used in the specification and the claims to mean "including, but not limited to".

[0022] The purpose of the present application is to provide a flange bolt connection layout optimization design method and related equipment to solve the technical problem of how to improve the sealing design of the bolt flange.

[0023] The present application will be described in further detail below with reference to the drawings: Embodiment 1 Referring to Figure 1 and Figure 2 In one embodiment of the present application, a flange bolt connection layout optimization design method is provided, comprising: Step 1, obtaining flange basic parameters, and constructing a stiffness calculation model based on the flange basic parameters; Specifically, the flange basic parameters include connected component size parameters (diameter, thickness), connected component material parameters, bolt preliminary selection parameters (diameter, strength grade), and other necessary design parameters.

[0024] Specifically, as shown in Figure 3 , the stiffness calculation model includes bolt segmented series stiffness calculation, stiffness calculation based on connected component quartic function pressure distribution model, and gasket model stiffness correction; wherein the expression of the bolt segmented series stiffness calculation is as follows:

[0025] In the formula, is the stiffness of a single bolt; is the stiffness caused by the elastic deformation of the threaded part; Wherein, the bolt rod section and the threaded section are distinguished, the stiffness is calculated in sections, and is superimposed according to the series rule.

[0026] In the stiffness calculation based on the connected component quartic function pressure distribution model, the boundary conditions of the quartic radial pressure distribution function include: bolt hole edge stress gradient constraint, flange contact surface maximum pressure point constraint.

[0027] In this embodiment, a quartic function pressure distribution model is introduced to establish the basis of the optimization design method, so as to be more in line with the actual stress distribution calculation, the adaptability of the thickness of the multi-flange, and the flexible boundary processing.

[0028] Step 2, determining the bolt margin parameter through the sealing surface pressure distribution based on the stiffness calculation model; Specifically, the bolt margin parameter is determined by controlling the influence of the edge effect on the uniformity of the pressure distribution, wherein when the bolt is close to the edge of the flange, the pressure distribution presents an edge protrusion effect, and then the dimensionless margin is used to determine the bolt margin parameter, and the expression is as follows: Dimensionless margin = 0.8 ; Wherein, is the distance between the bolt and the edge of the flange; is the bolt pressure distribution circle radius.

[0029] In this embodiment, the bolt diameter in the present application is defined as , the bolt pressure distribution circle radius is , the distance between the bolt and the edge of the flange is , and the dimensionless margin is . Through the combination of multiple plate thicknesses and the analysis of multiple dimensionless margins, it is found that the effect of the margin change on the gasket pressure distribution data presents a clear regularity, and the sample variance is smaller at the dimensionless margin of 0.7-0.9. Based on the above analysis, it is determined that the dimensionless margin value is 0.8 when designing.

[0030] In this embodiment, Figure 4 the pressure distribution of the connected part is shown in the schematic diagram, which shows that the pressure presents a quartic function distribution characteristic with respect to the radial distance. Unlike the traditional pressure cone model, the quartic function is used to fit and calculate the pressure distribution, which is more accurate in describing the actual situation of the pressure distribution, and provides a basis for reliable bolt layout design.

[0031] Wherein, the pressure distribution radius is calculated based on the flange thickness, the material elastic modulus and the bolt size.

[0032] Step 3, determining the bolt spacing parameter through the pressure distribution change based on the stiffness calculation model; Specifically, in the determination of the bolt spacing parameter through the pressure distribution change based on the stiffness calculation model, the minimum bolt spacing angle that meets the pressure change rate requirement is obtained through a multivariate linear regression model.

[0033] In this embodiment, in order to establish the quantitative relationship between the circumferential spacing of the flange bolt and the uniformity of the combined surface pressure distribution, the correlation rules of the key parameters are revealed through finite element analysis. The pressure distribution change rate is defined as the sealing uniformity index The lower value indicates the higher uniformity, and it has significant correlation with the flange structure parameters. The bolt spacing angle is defined as The elastic modulus of the flange material is a design result The flange thickness is an independent variable The flange thickness is an independent variable The reciprocal of the bolt distribution circle radius is an independent variable The reciprocal of the bolt distribution circle radius is an independent variable The reciprocal of the bolt distribution circle radius is an independent variable , The regression value is the bolt spacing angle when The multiple linear regression coefficients between each factor and the bolt spacing angle are obtained by the least square method Taking four kinds of flange materials (aluminum, copper, cast iron and 45 steel) and four kinds of wide flange specifications (DN100, DN200, DN400 and DN600) as examples, a multiple linear regression experiment is constructed, and finally the bolt arrangement spacing design formula under a certain uniformity index is obtained, and the drawing is shown in Figure 5 Since the number of bolts in the standard flange design process is an integer multiple of 4, the change rule of the number of bolts and the bolt spacing is not regular with the increase of the nominal inner diameter of the flange, the bolt spacing angle is designed in the present application, and the bolt spacing arc formed by the bolt arrangement circle is basically smaller than the standard flange spacing, so the number of bolts required according to the design method in the present application is more, and the uniformity of the pressure distribution is higher.

[0034] Step 4, parameterized modeling and simulation checking are performed on the determined bolt edge distance parameter and bolt spacing parameter with the pressure distribution change rate as the checking parameter to obtain a design result, and the flange bolt connection layout optimization design is completed through the design result.

[0035] Specifically, the design result automatically generates a simulation model through a parameterized interface, extracts a sealing surface pressure cloud diagram to calculate an actual pressure change rate, and outputs a design parameter when the actual pressure change rate meets the standard, wherein the design parameter is a final design parameter; when the actual pressure change rate exceeds or does not meet the standard, the conjugate gradient method is used to adjust the bolt edge distance or spacing and recheck.

[0036] In summary, the present application provides a flange bolt connection layout optimization design method based on a semi-analytical model, which breaks through the traditional design paradigm relying on empirical formula. The method breaks through by building a design system with sealing performance as the core target: first, an accurate stiffness model is established, and then a dimensionless edge distance optimization criterion driven by pressure distribution radius is proposed, and combined with a multiple linear regression model to realize quantitative design of bolt spacing, forming edge distance-spacing parameter coordination, and finally forming a closed-loop design link through parameterized modeling to ensure the sealing reliability of the layout scheme under complex working conditions. This method upgrades discrete experience to continuous scientific model, significantly improves design reliability, replaces the traditional empirical formula static strength design, thereby significantly improving sealing reliability, adapting to complex working conditions and greatly compressing the design cycle. It is suitable for flange bolt connection structure design in process industries such as petroleum and chemical industry, energy and power, and nuclear energy devices.

[0037] Embodiment 2 According to Figure 6 The embodiment also provides a flange bolt connection layout optimization design system, as shown in the figure, which comprises: A model construction module 1 is used to obtain flange basic parameters and construct a stiffness calculation model based on the flange basic parameters; A first parameter determination module 2 is used to determine the bolt edge distance parameter based on the stiffness calculation model through the sealing surface pressure distribution; A second parameter determination module 3 is used to determine the bolt spacing parameter based on the stiffness calculation model through the pressure distribution change; A parameter simulation processing module 4 is used to parameterize modeling and simulation checking with the pressure distribution change rate as the checking parameter for the determined bolt edge distance parameter and bolt spacing parameter to obtain the design result, and complete the flange bolt connection layout optimization design through the design result.

[0038] Embodiment 3 The present application also provides a mobile terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, such as a flange bolt connection layout optimization design program.

[0039] The processor executes the computer program to implement the steps of the above-mentioned flange bolt connection layout optimization design method, for example: Obtain flange basic parameters and construct a stiffness calculation model based on the flange basic parameters; Determine the bolt edge distance parameter based on the stiffness calculation model through the sealing surface pressure distribution; Determine the bolt spacing parameter based on the stiffness calculation model through the pressure distribution change; The determined bolt edge distance parameter and bolt spacing parameter are parameterized modeling and simulation checking with a pressure distribution change rate as a checking parameter to obtain a design result, and the flange bolt connection layout optimization design is completed through the design result.

[0040] Alternatively, the processor implements the functions of the modules in the above system when executing the computer program, for example: The model construction module 1 is configured to acquire flange basic parameters and construct a stiffness calculation model based on the flange basic parameters. The first parameter determination module 2 is configured to determine a bolt edge distance parameter through a sealing surface pressure distribution based on the stiffness calculation model. The second parameter determination module 3 is configured to determine a bolt spacing parameter through a pressure distribution change based on the stiffness calculation model. The parameter simulation processing module 4 is configured to parameterize modeling and simulation checking of the determined bolt edge distance parameter and bolt spacing parameter with a pressure distribution change rate as a checking parameter to obtain a design result, and complete the flange bolt connection layout optimization design through the design result.

[0041] Illustratively, the computer program can be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the mobile terminal.

[0042] For example, the computer program can be divided into a model construction module 1, a first parameter determination module 2, a second parameter determination module 3, and a parameter simulation processing module 4. The specific functions of each module are as follows: The model construction module 1 is configured to acquire flange basic parameters and construct a stiffness calculation model based on the flange basic parameters. The first parameter determination module 2 is configured to determine a bolt edge distance parameter through a sealing surface pressure distribution based on the stiffness calculation model. The second parameter determination module 3 is configured to determine a bolt spacing parameter through a pressure distribution change based on the stiffness calculation model. The parameter simulation processing module 4 is configured to parameterize modeling and simulation checking of the determined bolt edge distance parameter and bolt spacing parameter with a pressure distribution change rate as a checking parameter to obtain a design result, and complete the flange bolt connection layout optimization design through the design result.

[0043] The mobile terminal can be a desktop computer, a notebook, a palm computer, and a cloud server, etc. The mobile terminal can include, but is not limited to, a processor, a memory.

[0044] The processor can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The processor is a control center of the mobile terminal, which can connect all parts of the mobile terminal through various interfaces and lines.

[0045] The memory can be used to store the computer program and / or modules, and the processor can realize various functions of the mobile terminal by running or executing the computer program and / or modules stored in the memory, and calling data stored in the memory.

[0046] The memory can mainly include a program storage area and a data storage area. The program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), etc. The data storage area can store data created according to the use of the mobile terminal (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a nonvolatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other volatile solid-state memory device.

[0047] Embodiment 4 The application further provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps of the flange bolt connection layout optimization design method.

[0048] If the modules / units of the mobile terminal are implemented in the form of software function units and sold or used as independent products, the modules / units can be stored in a computer readable storage medium.

[0049] Based on such understanding, the present application implements all or part of the processes in the above method, and can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the above-mentioned aggregated reinforcement learning resource scheduling method can be implemented. The computer program includes computer program codes, which can be in the form of source code, object code, executable files or some intermediate forms, etc.

[0050] The computer readable medium can include any entity or device, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code.

[0051] It should be noted that the content contained in the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0052] Embodiment 5 A computer program product includes computer instructions instructing a computing device to perform operations corresponding to the flange bolt connection layout optimization design method described above.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them, although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or replaced by equivalents without departing from the spirit and scope of the present application, any modification or equivalent replacement thereof should be covered within the protection scope of the claims of the present application.

Claims

1. A method of optimizing a design of a flange bolting arrangement, characterized by, The method comprises the following steps: obtaining flange basic parameters, and constructing a stiffness calculation model based on the flange basic parameters; determining a bolt edge distance parameter based on the stiffness calculation model and a pressure distribution of a sealing surface; determining a bolt spacing parameter based on the stiffness calculation model and a pressure distribution change; parameterizing modeling and simulation checking the determined bolt edge distance parameter and bolt spacing parameter with a pressure distribution change rate as a checking parameter to obtain a design result, and completing flange bolt connection layout optimization design through the design result.

2. The method of claim 1, wherein, The flange basic parameters include connected piece size parameters, connected piece material parameters, and bolt preliminary selection parameters.

3. The method of claim 1, wherein, The stiffness calculation model includes bolt segmented series stiffness calculation and stiffness calculation based on a connected piece quartic function pressure distribution model; wherein the expression of the bolt segmented series stiffness calculation is as follows: In the formula, is the stiffness of the bolt alone; is the stiffness caused by elastic deformation of the threaded engagement. In the stiffness calculation based on the connected piece quartic function pressure distribution model, the boundary conditions of the quartic radial pressure distribution function include a bolt hole edge stress gradient constraint and a flange contact surface maximum pressure point constraint.

4. The method of claim 1, wherein, In the determination of the bolt edge distance parameter based on the stiffness calculation model and the pressure distribution of the sealing surface, the bolt edge distance parameter is determined by controlling the influence of the edge effect on the uniformity of the pressure distribution; wherein when the bolt is close to the flange edge, the pressure distribution presents an edge protrusion effect, and then a dimensionless edge distance is used to determine the bolt edge distance parameter, and the expression is as follows: Non-dimensional margin ; wherein is the bolt distance to the flange edge; is the bolt pressure distribution circle radius.

5. The method of claim 1, wherein, In the determination of the bolt spacing parameter based on the stiffness calculation model and the pressure distribution change, the minimum bolt spacing angle that meets the pressure change rate requirement is obtained through a multivariate linear regression model.

6. The method of designing a layout of a flange bolting arrangement according to claim 1, characterized in that, The design result automatically generates a simulation model through a parameterization interface, extracts a sealing surface pressure cloud diagram to calculate an actual pressure change rate, outputs a design parameter when the actual pressure change rate meets the standard, and the design parameter is a final design parameter; When the actual pressure change rate is out of standard or does not meet the standard, the conjugate gradient method is used to adjust the bolt edge distance or spacing and recheck.

7. A flange bolting layout optimization design system, characterized by, The method comprises the following steps: a model construction module, configured to obtain flange basic parameters, and construct a stiffness calculation model based on the flange basic parameters; a first parameter determination module, configured to determine a bolt edge distance parameter based on the stiffness calculation model and a pressure distribution of a sealing surface; a second parameter determination module, configured to determine a bolt spacing parameter based on the stiffness calculation model and a pressure distribution change; a parameter simulation processing module, configured to parameterize modeling and simulation checking the determined bolt edge distance parameter and bolt spacing parameter with a pressure distribution change rate as a checking parameter to obtain a design result, and complete flange bolt connection layout optimization design through the design result.

8. A mobile terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the steps of the flange bolt connection layout optimization design method according to any one of claims 1-6.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by the processor to realize the steps of the flange bolt connection layout optimization design method according to any one of claims 1-6.

10. A computer program product comprising computer instructions, characterized in that, The computer instructions instruct the computing device to perform the operations corresponding to the flange bolt connection layout optimization design method according to any one of claims 1-6.

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