Method and device for determining combined stress of pipeline, and storage medium

Abstract

The application provides a pipeline combined stress determination method and device and a storage medium, relates to the technical field of pipelines, and is used for improving the accuracy of determining the combined stress of a pipeline. The method comprises the following steps: acquiring pipeline parameters of a pipeline and mechanical characteristic parameters of soil bodies around the pipeline, the pipeline parameters comprising at least one of the following: a pipeline route, a buried depth parameter, a bend pipe geometric parameter, a pipeline size and a pipeline mechanical property. A stress analysis finite element model is established based on the pipeline parameters and the mechanical characteristic parameters of the soil bodies around the pipeline, and the stress analysis finite element model is used to determine the pipeline stress. The pipeline stress of the pipeline is determined based on the stress analysis finite element model. The combined stress of the pipeline is determined based on the pipeline stress.

Description

Technical Field

[0001] This application relates to the field of pipeline technology, and in particular to a method, apparatus and storage medium for determining combined stress in pipelines. Background Technology

[0002] With the continuous growth in energy transportation demand, long-distance pipelines are developing towards larger diameters, higher pressures, and higher steel grades, making their design and operational safety a major concern. Under bending loads, one side of the pipeline cross-section bears tensile stress, while the other side bears compressive stress. Existing pipeline combined stress analysis methods are too simplistic and cannot accurately calculate the combined stress of the pipeline. Summary of the Invention

[0003] This application provides a method, apparatus, and storage medium for determining combined stress in pipelines, which addresses the problem of inaccurate calculation of combined stress in pipelines.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] Firstly, this application provides a method for determining the combined stress of a pipeline. In this method, pipeline parameters and the mechanical characteristic parameters of the surrounding soil are obtained. The pipeline parameters include at least one of the following: pipeline route, burial depth parameters, bend geometry parameters, pipeline dimensions, and pipeline mechanical properties. Based on the pipeline parameters and the mechanical characteristic parameters of the surrounding soil, a stress analysis finite element model is established. This model is used to determine the pipeline stress. Based on the stress analysis finite element model, the pipeline stress is determined. Based on the pipeline stress, the combined stress of the pipeline is determined.

[0006] Based on the above technical solution, after obtaining the pipeline parameters and the mechanical characteristic parameters of the surrounding soil, a stress analysis finite element model can be established to ensure that the model closely resembles the actual usage environment and facilitates accurate parameter output. Furthermore, since the stress analysis finite element model is used to determine pipeline stress, the pipeline stress can be determined based on the stress analysis finite element model. Then, the combined stress of the pipeline can be determined based on the pipeline stress. Because each pipeline stress is based on the stress value output by the model under real-world conditions, calculating the combined stress from each pipeline stress can improve the accuracy of the combined stress calculation.

[0007] In one possible design, the pipe stress includes at least one of the following: circumferential stress, axial stress, bending stress, and shear stress.

[0008] In one possible design, the longitudinal stress is determined based on the axial stress and bending stress; where, if the bending stress is positive, the longitudinal stress is the sum of the axial stress and bending stress; and if the bending stress is negative, the longitudinal stress is the difference between the axial stress and bending stress. The combined stress is then determined based on the longitudinal stress, circumferential stress, and shear stress.

[0009] In one possible design, the circumferential stress, longitudinal stress, and shear stress are processed based on the maximum shear stress theory to obtain the theoretical combined stress. The circumferential stress, longitudinal stress, and shear stress are then processed based on the maximum shape change energy theory to obtain the theoretical combined stress. The combined stress is then determined based on both the theoretical combined stress and the theoretical combined stress.

[0010] In one possible design, the theoretical combined stress of the maximum shear stress satisfies the following formula:

[0011]

[0012] Among them, S EQ1 S is used to represent the theoretical combined stress of the maximum shear stress. H Used to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0013] In one possible design, the theoretical combined stress for the maximum shape change energy satisfies the following formula:

[0014]

[0015] Among them, S EQ2 S is used to represent the theoretical combined stress of the maximum shear stress. H Used to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0016] Secondly, this application provides a device for determining combined stress in a pipeline, the device comprising an acquisition module and a processing module.

[0017] The acquisition module is used to acquire pipeline parameters and the mechanical characteristic parameters of the surrounding soil. Pipeline parameters include at least one of the following: pipeline route, burial depth parameters, bend geometry parameters, pipeline dimensions, and pipeline mechanical properties. The processing module is used to establish a stress analysis finite element model based on the pipeline parameters and the mechanical characteristic parameters of the surrounding soil. This stress analysis finite element model is used to determine the pipeline stress. The processing module is also used to determine the combined stress of the pipeline based on the stress analysis finite element model.

[0018] In one possible design, the pipe stress includes at least one of the following: circumferential stress, axial stress, bending stress, and shear stress.

[0019] In one possible design, a processing module is used to determine the longitudinal stress based on the axial stress and bending stress; wherein, when the bending stress is positive, the longitudinal stress is the sum of the axial stress and the bending stress; and when the bending stress is negative, the longitudinal stress is the difference between the axial stress and the bending stress. The processing module is also used to determine the combined stress based on the longitudinal stress, circumferential stress, and shear stress.

[0020] In one possible design, a processing module is used to process the circumferential stress, longitudinal stress, and shear stress based on the maximum shear stress theory to obtain the theoretically combined stress. Another processing module is used to process the circumferential stress, longitudinal stress, and shear stress based on the maximum shape change energy theory to obtain the theoretically combined stress. Finally, a processing module is used to determine the combined stress based on the theoretically combined stress of maximum shear stress and the theoretically combined stress of maximum shape change energy.

[0021] In one possible design, the theoretical combined stress of the maximum shear stress satisfies the following formula:

[0022]

[0023] Among them, S EQ1 S is used to represent the theoretical combined stress of the maximum shear stress. H Used to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0024] In one possible design, the theoretical combined stress for the maximum shape change energy satisfies the following formula:

[0025]

[0026] Among them, S EQ2 S is used to represent the theoretical combined stress of the maximum shear stress. HUsed to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0027] Thirdly, this application provides an apparatus for determining combined pipe stress, the apparatus comprising: a processor and a memory; the processor and the memory being coupled; the memory being used to store one or more programs, the one or more programs including computer-executable instructions, wherein when the apparatus for determining combined pipe stress is in operation, the processor executes the computer-executable instructions stored in the memory to implement the method as described in the first aspect and any possible implementation thereof.

[0028] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the methods described in the first aspect and any possible implementation thereof.

[0029] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run computer programs or instructions to implement the methods described in the first aspect and any possible implementation thereof.

[0030] Sixthly, this application provides a computer program product containing instructions that, when executed by a computer, cause the computer to perform the methods described in the first aspect and any possible implementation thereof.

[0031] The technical problems that the device for determining pipeline combined stress, computer, computer storage medium, chip or computer program product can solve and the technical effects that can be achieved in the above solution can be found in the technical problems and effects solved in the first aspect above, and will not be repeated here. Attached Figure Description

[0032] Figure 1 A flowchart illustrating a method for determining combined stress in a pipeline, as provided in an embodiment of this application;

[0033] Figure 2 A schematic diagram of a device for determining combined stress in a pipeline, provided in an embodiment of this application;

[0034] Figure 3 A schematic diagram of another device for determining pipeline combination stress provided in an embodiment of this application;

[0035] Figure 4 A conceptual partial view of a computer program product provided for an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] Furthermore, the terms "comprising" and "having," and any variations thereof, used in the description of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the steps or modules listed, but may optionally include other steps or modules not listed, or may optionally include other steps or modules inherent to such process, method, product, or device.

[0038] Furthermore, in the embodiments of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0039] Under bending loads, one side of a pipe section is subjected to tensile stress, while the other side is subjected to compressive stress. Most existing pipe stress analysis software is based on traditional calculation methods and does not fully consider the positive and negative distribution characteristics of bending stress, resulting in underestimation of the combined stress calculation results, which adversely affects the safety of pipe design and operation.

[0040] like Figure 1 As shown, this application provides a method for determining combined stress in a pipeline, the method comprising:

[0041] S101. Obtain the pipeline parameters and the mechanical characteristic parameters of the soil surrounding the pipeline.

[0042] The pipeline parameters include at least one of the following: pipeline route, burial depth parameters, bend geometry parameters, pipeline dimensions, and pipeline mechanical properties.

[0043] For example, the geometric parameters of a bend may include: radius of curvature, bend angle, etc. Pipe dimensions may include: outer diameter, wall thickness. The mechanical characteristics of the soil surrounding the pipe may include: density, friction angle, cohesion.

[0044] For example, the outer diameter of the pipeline is 1219 mm, the pressure of the medium transported inside the pipeline is 10 MPa, the maximum operating temperature difference inside the pipeline is 38°C, and the steel grade of the pipeline is L555M (X80M). The radius of curvature of the cold-bent pipe is 40 × 1219 mm, and the radius of curvature of the hot-bent pipe is 6 × 1219 mm. The soil type of the surrounding soil is silty clay with a density of 2000 kg / m³. 3 ), cohesion 15 Pascals (kPa), friction angle 23 degrees.

[0045] For example, as shown in Table 1, it illustrates the pipe bottom elevation, straight pipe wall thickness, bend type, bend wall thickness, and pipe top burial depth at different locations. Here, pipe bottom elevation refers to the vertical height of the pipe bottom relative to the ground. Straight pipe wall thickness refers to the wall thickness of the straight section of the pipe. Bend type refers to the form or manufacturing process of the bend in the pipe. Bend wall thickness refers to the wall thickness of the bend section. Pipe top burial depth refers to the vertical distance from the ground to the outer surface of the top of the pipe.

[0046] Table 1

[0047]

[0048]

[0049] Here, x represents the horizontal coordinate of the pipe on the plane, and y represents the vertical coordinate of the pipe on the plane. The coordinate values ​​can be used to accurately describe the spatial position of different points on the pipe.

[0050] In one possible implementation, the server stores the pipe parameters and the mechanical characteristic parameters of the soil surrounding the pipe.

[0051] It should be understood that the server can be a standalone server or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms. This application embodiment does not limit this.

[0052] S102. Based on the pipeline parameters and the mechanical characteristic parameters of the soil surrounding the pipeline, a finite element model for stress analysis is established.

[0053] Among them, the stress analysis finite element model is used to determine the pipeline stress.

[0054] In one possible implementation, finite element software is deployed on the server. This software can be run to create a stress analysis finite element model based on the pipe parameters and the mechanical characteristics of the surrounding soil.

[0055] It should be understood that the embodiments of this application do not limit the finite element software. For example, the finite element software can be ANSYS, ABAQUS, COMSOL, etc.

[0056] S103. Based on the stress analysis finite element model, determine the pipeline stress.

[0057] In this embodiment, the pipeline stress includes at least one of the following: circumferential stress, axial stress, bending stress, and shear stress. The bending stress can be positive or negative.

[0058] Axial stress refers to the stress along the pipe's axis. Bending stress refers to the stress generated within the pipe due to bending deformation. Shear stress refers to the stress generated within the pipe when subjected to forces parallel to its surface. Circumferential stress refers to the stress generated along the pipe's circumference.

[0059] In one possible implementation, stress analysis using a finite element model can be used to calculate the stress data for each part of the pipeline, thereby obtaining the pipeline stress.

[0060] For example, the stress distribution and specific values ​​of a pipeline can be determined by methods such as stress cloud diagrams and stress values ​​at specific points in the pipeline.

[0061] For example, as shown in Table 2, it illustrates the pipe stress at each node of the pipe.

[0062] Table 2

[0063] node Axial stress (kPa) Bending stress (kPa) Torsional stress (kPa) Circumferential stress (kPa) 1530 37192.3 8732.4 0 160421 1532 37181.4 154623.5 0 160421 1535 37180.3 162139.8 0 160421 1538 37179.8 165345.4 0 160421 1539 36964.2 170803.1 0 160421 1540 37244.9 163586.4 0 160421

[0064] S104. Based on the pipeline stress, determine the combined stress of the pipeline.

[0065] In one possible implementation, the longitudinal stress is determined based on the axial stress and the bending stress. Specifically, when the bending stress is positive, the longitudinal stress is the sum of the axial stress and the bending stress. When the bending stress is negative, the longitudinal stress is the difference between the axial stress and the bending stress. Then, the combined stress is determined based on the longitudinal stress, the circumferential stress, and the shear stress.

[0066] In one possible design, when the bending stress is positive, the longitudinal stress satisfies the following formula.

[0067] S L =S A +S B Formula 1.

[0068] Among them, S A Used to represent axial stress, SB Used to represent bending stress.

[0069] In one possible design, when the bending stress is positive, the longitudinal stress satisfies the following formula 2.

[0070] S L =S A -S B Formula 2.

[0071] It should be understood that in the embodiments of this application, the stress of each pipe is calculated using the absolute value of its value.

[0072] For example, if the bending stress is 215 and the axial stress is 200, then the longitudinal stress is 415. If the bending stress is -215 and the axial stress is 200, then the longitudinal stress is -15.

[0073] For example, as shown in Table 3, the longitudinal stress at different nodes of the pipe is illustrated.

[0074] Table 3

[0075]

[0076]

[0077] For example, taking node 1530 of the pipe as an example, the longitudinal stress is 124.517 when the bending stress is positive. When the bending stress is negative, the longitudinal stress is -50.32.

[0078] Understandably, by distinguishing between positive and negative bending stresses, the method for determining longitudinal stress can be adjusted, thereby ensuring the accuracy of longitudinal stress. Subsequently, based on longitudinal stress, circumferential stress, and shear stress, the accuracy of determining combined stresses can be improved.

[0079] Based on the above technical solution, after obtaining the pipeline parameters and the mechanical characteristic parameters of the surrounding soil, a stress analysis finite element model can be established to ensure that the model closely resembles the actual usage environment and facilitates accurate parameter output. Furthermore, since the stress analysis finite element model is used to determine pipeline stress, the pipeline stress can be determined based on the stress analysis finite element model. Then, the combined stress of the pipeline can be determined based on the pipeline stress. Because each pipeline stress is based on the stress value output by the model under real-world conditions, calculating the combined stress through the individual pipeline stresses can improve the accuracy of the combined stress calculation.

[0080] In some embodiments, the circumferential stress, longitudinal stress, and shear stress can be processed based on the maximum shear stress theory to obtain the theoretical combined stress. Then, the circumferential stress, longitudinal stress, and shear stress are processed based on the maximum shape change energy theory to obtain the theoretical combined stress. Finally, the combined stress is determined based on the theoretical combined stress of maximum shear stress and the theoretical combined stress of maximum shape change energy.

[0081] In one possible design, the theoretical combination of maximum shear stress satisfies the following formula three.

[0082]

[0083] Among them, S EQ1 S is used to represent the theoretical combined stress of the maximum shear stress. H Used to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0084] It should be understood that the maximum shear stress theory can also be called the third strength theory.

[0085] In one possible design, the maximum shape change energy theoretical combined stress satisfies the following formula four.

[0086]

[0087] Among them, S EQ1 Used to represent the theoretical combined stress of maximum shape change energy.

[0088] It should be understood that the maximum shape change energy theory can also be called the fourth intensity theory.

[0089] For example, in conjunction with Table 3, Table 4 shows the combined stress at different nodes of the pipeline when the bending stress is positive and negative, obtained by the maximum shape change energy theory, and the difference between the combined stress when the bending stress is positive and negative.

[0090] Table 4

[0091]

[0092] For example, taking node 1530 of the pipeline as an example, when the bending stress is positive, the theoretical combined stress of the maximum shape change energy is 145.791. When the bending stress is negative, the theoretical combined stress of the maximum shape change energy is 190.570. That is, the difference between the theoretical combined stress of the maximum shape change energy when the bending stress is positive and the theoretical combined stress of the maximum shape change energy when the bending stress is negative is -44.779. The theoretical combined stress of the maximum shape change energy when the bending stress is negative will be taken as the combined stress of the pipeline.

[0093] In this embodiment, if the theoretical combined stress of the maximum shear stress is greater than the theoretical combined stress of the maximum shape change energy, then the theoretical combined stress of the maximum shear stress is taken as the combined stress of the pipeline. Similarly, if the theoretical combined stress of the maximum shape change energy is greater than the theoretical combined stress of the maximum shear stress, then the theoretical combined stress of the maximum shape change energy is taken as the combined stress of the pipeline.

[0094] Understandably, by comparing the theoretical combined stress of maximum shear stress with the theoretical combined stress of maximum shape change energy, a larger stress can be obtained, which can then be used as the combined stress of the pipeline. This allows for a more accurate determination of the combined stress.

[0095] In some embodiments, an evaluation result can be obtained based on the combined stress of the pipeline and the pipeline pressure threshold, and this evaluation result is used to reflect whether the pipeline meets safety conditions.

[0096] In one possible implementation, the pass rate can be obtained based on the combined stress and pressure threshold of the pipeline. If the pass rate is greater than a preset threshold, the evaluation result is used to indicate that the pipeline meets safety requirements.

[0097] For example, suppose the pipe material is L555, the yield strength is 555, the pipe pressure threshold is 277.5, and the preset percentage threshold is 55%. As shown in Table 5, it shows the combined stress evaluation results of each node in the pipe.

[0098] Table 5

[0099]

[0100] In some embodiments, sub-results and target quantities for each node of the pipeline can be obtained. Sub-results indicate whether a node of the pipeline meets safety conditions, and the target quantity is the number of sub-results indicating that a node meets safety conditions. If the target quantity is greater than a preset threshold, the evaluation result of the pipeline is determined to indicate that the pipeline meets safety conditions.

[0101] The foregoing mainly describes the solutions provided in the embodiments of this application from a methodological perspective. It is understood that the device for determining pipe combined stress includes hardware structures and / or software modules corresponding to each function in order to achieve the above-mentioned functions. Those skilled in the art should readily recognize that the pipe combined stress determination method steps described in conjunction with the embodiments disclosed in this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0102] This application also provides a device for determining combined pipeline stress. This device can be a server, a CPU within the server, a module for determining combined pipeline stress in a mobile terminal, or a client within the server for determining combined pipeline stress.

[0103] This application embodiment can divide the device for determining pipeline combined stress into functional modules or functional units according to the above method example. For example, each function can be divided into a separate functional module or functional unit, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or in software functional modules or functional units. The module or unit division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0104] This application provides a device for determining combined stress in a pipeline. For example... Figure 2 As shown, the device for determining the combined stress of the pipeline may include: an acquisition module 201 and a processing module 202.

[0105] The acquisition module 201 is used to acquire pipeline parameters and the mechanical characteristic parameters of the surrounding soil. The pipeline parameters include at least one of the following: pipeline route, burial depth parameters, bend geometry parameters, pipeline dimensions, and pipeline mechanical properties. The processing module 202 is used to establish a stress analysis finite element model based on the pipeline parameters and the mechanical characteristic parameters of the surrounding soil. The stress analysis finite element model is used to determine the pipeline stress. The processing module 202 is also used to determine the pipeline stress based on the stress analysis finite element model. Furthermore, the processing module 202 is used to determine the combined stress of the pipeline based on the pipeline stress.

[0106] In one possible design, the pipe stress includes at least one of the following: circumferential stress, axial stress, bending stress, and shear stress.

[0107] In one possible design, processing module 202 is used to determine longitudinal stress based on axial stress and bending stress; wherein, when the bending stress is positive, the longitudinal stress is the sum of the axial stress and bending stress; and when the bending stress is negative, the longitudinal stress is the difference between the axial stress and bending stress. Processing module 202 is also used to determine combined stress based on longitudinal stress, circumferential stress, and shear stress.

[0108] In one possible design, processing module 202 is used to process the circumferential stress, longitudinal stress, and shear stress based on the maximum shear stress theory to obtain the theoretical combined stress. Processing module 202 is also used to process the circumferential stress, longitudinal stress, and shear stress based on the maximum shape change energy theory to obtain the theoretical combined stress. Finally, processing module 202 is used to determine the combined stress based on the theoretical combined stress of maximum shear stress and the theoretical combined stress of maximum shape change energy.

[0109] In one possible design, the theoretical combined stress of the maximum shear stress satisfies the following formula:

[0110]

[0111] Among them, S EQ1 S is used to represent the theoretical combined stress of the maximum shear stress. H Used to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0112] In one possible design, the theoretical combined stress for the maximum shape change energy satisfies the following formula:

[0113]

[0114] Among them, S EQ2 S is used to represent the theoretical combined stress of the maximum shear stress. H Used to represent circumferential stress, S L Used to represent axial stress, S T Used to represent shear stress.

[0115] Figure 3 This is a schematic diagram illustrating the structure of a device for determining combined pipe stress according to an exemplary embodiment. The device may include a processor 302, which executes application code to implement the method for determining combined pipe stress according to this application.

[0116] Processor 302 may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0117] like Figure 3 As shown, the device for determining the combined stress of the pipeline may further include a memory 303. The memory 303 stores the application code for executing the scheme of this application, and its execution is controlled by the processor 302.

[0118] Memory 303 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. Memory 303 may exist independently and be connected to processor 302 via bus 304. Memory 303 may also be integrated with processor 302.

[0119] like Figure 3 As shown, the device for determining pipe combined stress may further include a communication interface 301, wherein the communication interface 301, processor 302, and memory 303 may be coupled to each other, for example, through a bus 304. The communication interface 301 is used for information exchange with other devices, for example, supporting information exchange between the device for determining pipe combined stress and other devices.

[0120] It should be pointed out that, Figure 3 The equipment structure shown does not constitute a limitation on the device for determining the combined stress of the pipeline, except... Figure 3 In addition to the components shown, the device for determining the combined stress of the pipeline may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0121] In actual implementation, the functions implemented by the processing unit can be derived from... Figure 3 The processor 302 shown calls the program code in memory 303 to implement this.

[0122] This application also provides a computer-readable storage medium storing instructions that, when executed by a processor of a computer device, enable the computer to perform the method for determining pipe combination stress provided in the embodiments described above. For example, the computer-readable storage medium may be a memory 303 including instructions, which may be executed by a processor 302 of a computer device to complete the method. Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a ROM, RAM, CD-ROM, magnetic tape, floppy disk, or optical data storage device.

[0123] Figure 4 A conceptual partial view of a computer program product provided in an embodiment of this application is shown schematically. The computer program product includes a computer program for executing computer processes on a computing device.

[0124] In one embodiment, the computer program product is provided using a signal bearer medium 400. The signal bearer medium 400 may include one or more program instructions.

[0125] In some examples, the signal carrying medium 400 may include a computer-readable medium 401, such as, but not limited to, a hard disk drive, a compact disc (CD), a digital video optical disc (DVD), a digital magnetic tape, a memory, a read-only memory (ROM), or a random access memory (RAM), and so on.

[0126] In some implementations, the signal carrying medium 400 may include a computer recordable medium 402, such as, but not limited to, a memory, a read / write (R / W) CD, a R / W DVD, and so on.

[0127] In some implementations, the signal carrying medium 400 may include a communication medium 403, such as, but not limited to, digital and / or analog communication media (e.g., fiber optic cables, waveguides, wired communication links, wireless communication links, etc.).

[0128] The signal-bearing medium 400 can be transmitted by a wireless communication medium 403. One or more program instructions may be, for example, computer-executable instructions or logical implementation instructions.

[0129] In some examples, the device for determining the combined stress of the pipe can be configured to provide various operations, functions, or actions in response to one or more program instructions in a computer-readable medium 401, a computer-recordable medium 402, and / or a communication medium 403.

[0130] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0131] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0132] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the constituent units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0133] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0134] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or a complete or partial classification of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0135] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining combined stress in a pipeline, characterized in that, The method includes: Obtain the pipeline parameters and the mechanical characteristic parameters of the soil surrounding the pipeline. The pipeline parameters include at least one of the following: pipeline route, burial depth parameters, bend geometry parameters, pipeline size, and pipeline mechanical properties. Based on the pipeline parameters and the mechanical characteristic parameters of the soil surrounding the pipeline, a stress analysis finite element model is established, which is used to determine the pipeline stress. Based on the stress analysis finite element model, the pipe stress of the pipeline is determined; Based on the pipeline stress, the combined stress of the pipeline is determined.

2. The method according to claim 1, characterized in that, The pipeline stress includes at least one of the following: circumferential stress, axial stress, bending stress, and shear stress.

3. The method according to claim 2, characterized in that, The determination of the combined stress of the pipeline based on the pipeline stress includes: Based on the axial stress and the bending stress, the longitudinal stress is determined; wherein, when the bending stress is positive, the longitudinal stress is the sum of the axial stress and the bending stress; when the bending stress is negative, the longitudinal stress is the difference between the axial stress and the bending stress. The combined stress is determined based on the longitudinal stress, the circumferential stress, and the shear stress.

4. The method according to claim 3, characterized in that, Determining the combined stress based on the longitudinal stress, the circumferential stress, and the shear stress includes: The circumferential stress, the longitudinal stress, and the shear stress are processed based on the maximum shear stress theory to obtain the combined stress of the maximum shear stress theory. The circumferential stress, longitudinal stress, and shear stress are processed based on the maximum shape change energy theory to obtain the combined stress of the maximum shape change energy theory. The combined stress is determined based on the theoretical combined stress of the maximum shear stress and the theoretical combined stress of the maximum shape change energy.

5. The method according to claim 4, characterized in that, The theoretical combination of the maximum shear stress satisfies the following formula: Wherein, the S EQ1 S is used to represent the theoretical combined stress of the maximum shear stress. H S is used to represent the circumferential stress. L S is used to represent the axial stress. T Used to represent the shear stress.

6. The method according to claim 4, characterized in that, The theoretical combined stress of the maximum shape change energy density satisfies the following formula: Wherein, the S EQ2 S is used to represent the theoretical combined stress of the maximum shear stress. H S is used to represent the circumferential stress. L S is used to represent the axial stress. T Used to represent the shear stress.

7. A device for determining combined stress in a pipeline, characterized in that, The device includes: The acquisition module is used to acquire pipeline parameters and mechanical characteristic parameters of the soil surrounding the pipeline. The pipeline parameters include at least one of the following: pipeline route, burial depth parameters, bend geometry parameters, pipeline size, and pipeline mechanical properties. The processing module is used to establish a stress analysis finite element model based on the pipeline parameters and the mechanical characteristic parameters of the soil surrounding the pipeline, and the stress analysis finite element model is used to determine the pipeline stress. The processing module is also used to determine the pipe stress of the pipeline based on the stress analysis finite element model; The processing module is also used to determine the combined stress of the pipeline based on the pipeline stress.

8. A device for determining combined stress in a pipeline, characterized in that, include: Processor and memory; The processor and the memory are coupled; The memory is used to store one or more programs, the one or more programs including computer-executable instructions, wherein when the pipe combination stress determination device is running, the processor executes the computer-executable instructions stored in the memory to cause the pipe combination stress determination device to perform the method as described in any one of claims 1-6.

9. A computer-readable storage medium storing instructions, characterized in that, When the computer executes the instruction, the computer performs the method as described in any one of claims 1-6.

10. A computer program product containing instructions, characterized in that, When the instruction is executed by the computing device, the computing device performs the method as described in any one of claims 1-6.

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