T-type intermittent weld seam verification method and related apparatus

Abstract

The present application belongs to the technical field of welding, and discloses a T-shaped intermittent welding weld verification method and related equipment, the method comprising: obtaining the element size of a to-be-welded element and welding conditions, determining the weld parameters of the weld according to the element size and welding conditions; constructing a finite element model of the to-be-welded element according to the element size, determining the transfer load of the weld according to the finite element model; determining the cross-section coefficient of the weld according to the element size and weld parameters; determining the normal stress and shear stress of the weld according to the transfer load, weld parameters and cross-section coefficient; determining the membrane stress and the sum of the membrane stress and bending stress of the weld according to the normal stress and shear stress; calculating the safety factor of the weld according to the membrane stress and the sum of the membrane stress and bending stress, and verifying the weld parameters according to the safety factor.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically relating to a method for verifying T-type intermittent weld seams, a computer-readable storage medium, a T-type intermittent weld seam verification system, a T-type intermittent weld seam verification device, and a T-type intermittent weld seam verification equipment. Background Technology

[0002] Vacuum containers must possess sufficient strength and rigidity to withstand various loads. Vacuum containers used in fusion devices are mostly thin-walled structures, requiring consideration of the possibility of buckling instability and failure. Welding is a key process in the manufacturing of vacuum containers. High-quality welding technology ensures weld strength and sealing. Different weld structures are used in different parts, among which reinforcing rings and support connections are crucial for structural stability.

[0003] In the welding of large-size vacuum vessels, continuous welding involves a large workload and significant thermal deformation. Intermittent welding can mitigate these drawbacks, but its strength is lower than that of continuous welding. Therefore, verifying the strength of intermittent welds is crucial. Currently, the design of welded joints in vacuum vessels relies on experience and standards. For non-standard or structurally diverse components, without calculating and verifying weld strength based on empirical formulas, the weld size is often excessively large to ensure safety, increasing workload, cost, reducing performance, and even affecting installation. Furthermore, the development of finite element method (FEM) software has brought new methods for strength verification. However, when using FEM to calculate weld stress, modeling complex welds is often difficult, and convergence or unusual results may occur during the calculation. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first objective of this invention is to propose a method for verifying T-type intermittent welds, which can accurately adjust and verify weld parameters until the weld parameters that meet the weld strength requirements are determined. This improves the accuracy of T-type intermittent weld verification, precisely quantifies weld parameters, has a fast calculation speed, high reliability of results, and effectively reduces welding deformation of structural components.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide a T-type intermittent weld seam verification system.

[0007] The fourth objective of this invention is to provide a T-type intermittent weld inspection device.

[0008] The fifth objective of this invention is to provide a T-type intermittent weld inspection device.

[0009] A method for verifying T-type intermittent welds according to an embodiment of the present invention includes: obtaining the component dimensions and welding conditions of the component to be welded; determining the weld parameters based on the component dimensions and welding conditions; constructing a finite element model of the component to be welded based on the component dimensions; determining the transmitted load of the weld based on the finite element model; determining the section modulus of the weld based on the component dimensions and weld parameters; determining the normal stress and shear stress of the weld based on the transmitted load, weld parameters, and section modulus; determining the membrane stress and the sum of the membrane stress and bending stress of the weld based on the normal stress and shear stress; calculating the safety factor of the weld based on the membrane stress and the sum of the membrane stress and bending stress; and verifying the weld parameters based on the safety factor.

[0010] In some embodiments, the components to be welded include a first component and a second component; constructing a finite element model of the components to be welded according to the component dimensions includes: constructing a finite element model of the first component according to the component dimensions of the first component, constructing a finite element model of the second component according to the component dimensions of the second component; establishing a connection between the finite element model of the first component and the finite element model of the second component through a binding contact, so as to simulate the welding conditions of the first component and the second component.

[0011] In some embodiments, determining the transmitted load of the weld based on the finite element model includes: extracting nodal forces on the effective cross section of the weld based on the finite element model, the element load of the first element, and the element load of the second element; and calculating the integral of the nodal forces on the effective cross section of the weld to determine the transmitted load of the weld.

[0012] In some embodiments, weld parameters include weld leg size, weld length, and weld spacing between each weld.

[0013] In some embodiments, the weld type includes a T-type fillet weld or a T-type groove weld.

[0014] In some embodiments, the welding forms of the weld seam include side-by-side intermittent welding, staggered intermittent welding, and intermittent welding on one side and continuous welding on the other side.

[0015] In some embodiments, the transmitted load includes a first transmitted force and a first transmitted torque of the weld in a first direction, a second transmitted force and a second transmitted torque of the weld in a second direction, and a third transmitted force and a third transmitted torque of the weld in a third direction; the first direction is a direction perpendicular to the weld length and perpendicular to the first element, the second direction is a direction parallel to the weld length, and the third direction is a direction perpendicular to the weld length and perpendicular to the second element.

[0016] In some embodiments, the section modulus includes the area of ​​the effective section of the weld, the moment of inertia of the weld about a first direction, and the moment of inertia of the weld about a second direction.

[0017] In some embodiments, determining the normal stress and shear stress of the weld based on the transmitted load, weld parameters, and section modulus includes: determining the normal stress of the weld in a first direction based on a first transmitted force, a third transmitted torque, section modulus, weld parameters, and the number of welds; and determining the shear stress of the weld in a second direction based on a second transmitted force, a third transmitted torque, section modulus, weld parameters, and the element size of the first element.

[0018] In some embodiments, determining the membrane stress of the weld and the sum of the membrane stress and bending stress based on the normal stress and shear stress includes:

[0019] The membrane stress and the sum of the membrane stress and bending stress are determined based on the normal stress perpendicular to the effective section of the weld, the shear stress parallel to the effective section of the weld, and the shear stress parallel to the length of the weld.

[0020] In some embodiments, the safety factor of the weld is calculated based on the membrane stress and the sum of the membrane stress and the bending stress, including:

[0021] The first safety factor for membrane stress is determined based on membrane stress, and the second safety factor for bending stress is determined based on bending stress.

[0022] In some embodiments, verifying weld parameters based on a safety factor includes:

[0023] When the first safety factor is greater than or equal to the first preset safety factor and the second safety factor is greater than or equal to the second preset safety factor, the weld parameters are determined to pass the verification.

[0024] If the first safety factor is less than the first preset safety factor, or the second safety factor is less than the second preset safety factor, the weld parameters are determined to have failed the verification.

[0025] In some embodiments, the method further includes:

[0026] Adjust the weld parameters;

[0027] The adjusted weld parameters are re-verified until they pass the verification.

[0028] Secondly, embodiments of the present invention provide a computer-readable storage medium storing a weld verification program. When the weld verification program is executed by a processor, it can implement the above-mentioned T-type intermittent weld verification method.

[0029] Thirdly, embodiments of the present invention provide a T-type intermittent weld seam verification system, including a memory and a processor. When the processor executes a T-type intermittent weld seam verification program stored in the memory, it implements the T-type intermittent weld seam verification method described above.

[0030] Fourthly, embodiments of the present invention provide a T-type intermittent weld seam verification device. The device includes: an acquisition module configured to acquire the component dimensions and welding conditions of the component to be welded, and determine the weld seam parameters based on the component dimensions and the welding conditions; a construction module configured to construct a finite element model of the component to be welded based on the component dimensions, and determine the transmitted load of the weld seam based on the finite element model; a determination module configured to determine the section modulus of the weld seam based on the component dimensions and the weld seam parameters; a first calculation module configured to determine the normal stress and shear stress of the weld seam based on the transmitted load, the weld seam parameters, and the section modulus; a first calculation module configured to determine the membrane stress and the sum of the membrane stress and bending stress of the weld seam based on the normal stress and the shear stress; and a verification module configured to calculate the safety factor of the weld seam based on the membrane stress and the sum of the membrane stress and bending stress, and verify the weld seam parameters based on the safety factor.

[0031] Fifthly, embodiments of the present invention provide a T-type intermittent weld seam inspection device, including the above-mentioned T-type intermittent weld seam inspection device.

[0032] The technical solution provided by this invention first obtains the component dimensions and welding conditions of the component to be welded, and determines the weld parameters based on the component dimensions and welding conditions. Then, a finite element model of the component to be welded is constructed based on the component dimensions, and the transmitted load of the weld is determined based on the finite element model. Next, the section modulus of the weld is determined based on the component dimensions and weld parameters. Then, the normal stress and shear stress of the weld are determined based on the transmitted load, weld parameters, and section modulus. Further, the membrane stress and the sum of the membrane stress and bending stress of the weld are determined based on the normal stress and shear stress. Finally, the safety factor of the weld is calculated based on the membrane stress and the sum of the membrane stress and bending stress, and the weld parameters are verified based on the safety factor. This invention performs mechanical analysis on the structure of the component to be welded, determines the intermittent welding method, obtains the weld parameters, extracts the transmitted load of the weld to be checked, calculates the membrane stress and bending stress of the weld using the stress classification method, determines the safety factor corresponding to the membrane stress and bending stress, and completes the strength verification of the weld based on the safety factor. This invention can accurately adjust and verify weld parameters until the weld parameters that meet the weld strength requirements are determined, thereby improving the accuracy of weld verification for T-type intermittent welding, precisely quantifying weld parameters, and having a fast calculation speed and high reliability. At the same time, it effectively reduces the welding deformation of structural components.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0035] Figure 1 A flowchart of the T-type intermittent weld inspection method provided in the embodiments of the present invention;

[0036] Figure 2 A schematic cross-sectional view of a T-shaped fillet weld provided in an embodiment of the present invention;

[0037] Figure 3 This is a cross-sectional schematic diagram of a T-groove weld provided in an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of a T-shaped fillet weld with side-by-side intermittent welding (the number of side-by-side welds is odd) provided in an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of side-by-side intermittent welding of T-shaped fillet welds (the number of side-by-side welds is even) provided in an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of staggered intermittent welding of T-shaped fillet welds (the number of staggered welds is odd) provided in an embodiment of the present invention;

[0041] Figure 7 A schematic diagram of staggered intermittent welding of T-shaped fillet welds (the number of staggered welds is even) provided in an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of a T-shaped fillet weld with intermittent welding on one side and continuous welding on the other side (the number of welds is odd) provided in an embodiment of the present invention;

[0043] Figure 9 A schematic diagram of a T-groove weld with side-by-side intermittent welding (the number of side-by-side welds is odd) provided in an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the weld inspection process provided in an embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of the structure of the T-type intermittent weld seam verification system provided in an embodiment of the present invention;

[0046] Figure 12 A schematic diagram of a T-type intermittent weld seam inspection device provided in an embodiment of the present invention;

[0047] Figure 13 This is a schematic diagram of a T-type intermittent weld seam inspection device provided in an embodiment of the present invention.

[0048] Reference numerals: 1-First element; 2-Second element; 1110-Processor; 1120-Memory; 1130-Input / output interface; 1140-Communication interface; 1150-Bus; 1200-Weld verification device; 1210-Acquisition module; 1220-Construction module; 1230-Determination module; 1240-First calculation module; 1250-Second calculation module; 1260-Verification module; 1300-Weld verification equipment. Detailed Implementation

[0049] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention.

[0050] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0051] As described in the background section, the vacuum container is a critical component in fusion devices and related fields, with stringent performance requirements. On one hand, the vacuum container must possess sufficient strength and rigidity to withstand internal vacuum pressure, external mechanical loads, and high temperature and heat loads, preventing deformation and rupture under these complex conditions and ensuring the safe and stable operation of the equipment. Given that fusion devices are typically large in size, their vacuum container has a large ratio of shape dimensions to wall thickness, exhibiting thin-walled structural characteristics. This makes buckling instability-induced structural instability a crucial factor that must be considered.

[0052] On the other hand, welding, as a core process in vacuum container manufacturing, plays a decisive role in the quality of the container. To ensure sufficient strength and good sealing performance of the welds, high-quality welding techniques, such as electron beam welding and laser welding, are required. Specific requirements exist for the design of welded joints in vacuum containers: the circumferential and longitudinal welds of the shell adopt a full-penetration structure to ensure the strength and reliability of the connection; non-pressure accessories, such as lifting lugs, supports, and reinforcing rings, typically use T-type fillet welds for their connection to the shell, with the connection between the reinforcing rings and supports being particularly critical to the structural stability of the vacuum container.

[0053] However, numerous challenges arise during the welding of large-scale vacuum containers. Since components can be tens of meters long and multiple similar weld seams may repeat, continuous welding would not only significantly increase the workload but also substantially increase deformation due to heat input, affecting the container's precision and quality. In contrast, while intermittent welding reduces workload and thermal deformation, its strength is inferior to continuous welding. Therefore, when selecting intermittent welding, its strength must be rigorously verified to ensure the vacuum container operates safely and reliably under various conditions. This has become a critical issue that urgently needs to be addressed in current vacuum container manufacturing.

[0054] Currently, in the design of welded joints for vacuum containers, designers determine the joint type, bevel, angle, and dimensions based on various design standards and their experience. Process engineers then develop welding processes and parameters based on the production site conditions and weld size requirements to complete the welding of the structure. During weld design, the structural dimensions of intermittent welds rely heavily on the designer's experience and domestic and international design standards. Some standards provide empirical formulas for checking fillet welds, but these formulas often have limited applicability. For non-standard or structurally diverse components, without calculating and checking weld strength based on empirical formulas, weld dimensions are often excessively large to ensure structural safety. This excessively large weld size increases welding workload, reduces production efficiency, and increases production costs. Furthermore, it leads to high heat input, increased welding deformation, decreased structural performance, and even installation failure. In addition, the development of finite element method (FEM) software has brought new methods for strength verification. However, when using FEM to calculate weld stress, modeling complex welds is often difficult, and the calculations may fail to converge or produce unusual results.

[0055] refer to Figure 1 This is a flowchart of the T-type intermittent weld seam inspection method provided in an embodiment of the present invention.

[0056] Step S101: Obtain the component dimensions and welding conditions of the component to be welded, and determine the weld parameters based on the component dimensions and welding conditions.

[0057] Specifically, in this embodiment of the invention, the specific dimensions of the component to be welded encompass key geometric parameters such as the component's length, width, and thickness. Simultaneously, the welding conditions are clearly defined, including the temperature, pressure, load type, and working environment conditions during welding. Based on the obtained component dimensions and welding condition information, various weld parameters, weld type, and welding form are accurately determined through specific calculation methods, empirical formulas, or reference to relevant design standards.

[0058] As an optional embodiment, weld parameters include weld leg size, weld length, and weld spacing between each weld.

[0059] The weld leg size refers to the height of the weld leg in a fillet weld. It directly determines the cross-sectional area of ​​the weld, thus affecting its load-bearing capacity. Generally, a larger weld leg size allows the weld to withstand a greater load, but it also increases the amount of welding material used and the heat input, potentially leading to increased weld deformation. Therefore, in practical engineering, the weld leg size needs to be determined rationally based on factors such as the structural stress, material properties, and welding process.

[0060] Weld length refers to the dimension of the weld along its extension direction. Longer welds can provide a larger connection area, enhancing the overall integrity and stability of the structure. However, excessively long welds also increase welding time and cost, and may lead to increased welding deformation and residual stress due to heat accumulation. Therefore, when designing weld length, factors such as structural strength requirements, welding process feasibility, and economic efficiency must be comprehensively considered.

[0061] The weld spacing between each weld refers to the distance between the centerlines of two adjacent welds. A reasonable weld spacing can avoid stress concentration between welds, ensuring that the welds can fully utilize their load-bearing capacity. If the weld spacing is too small, the heat-affected zones of adjacent welds may overlap, leading to a decrease in material properties and increasing the risk of cracking; while if the weld spacing is too large, it may fail to meet the connection strength requirements of the structure. Therefore, determining an appropriate weld spacing is crucial for ensuring weld quality.

[0062] As an optional embodiment, the weld type includes a T-type fillet weld or a T-type groove weld.

[0063] Specifically, in actual welding processes, the type of weld can be selected according to specific structural requirements and welding standards. Common types include fillet welds (T-Joints) or groove welds (T-Joints). These two weld types are widely used in fields such as mechanical manufacturing and steel structure engineering, and each has unique structural characteristics and applicable scenarios.

[0064] refer to Figure 2 This is a cross-sectional schematic diagram of a T-shaped fillet weld provided in an embodiment of the present invention.

[0065] A T-fillet weld is a weld used to connect two perpendicular components forming a T-shape. It is typically formed at the right-angle intersection of two components by welding filler material, creating an approximately triangular weld. For example, when welding a vertical steel plate to a horizontal steel plate to form a T-shape, the weld applied at their intersection is a T-fillet weld.

[0066] refer to Figure 3 This is a cross-sectional schematic diagram of a T-groove weld provided in an embodiment of the present invention.

[0067] T-groove welding is also used to connect T-shaped components, but unlike T-fillet welds, it requires machining a groove of a specific shape and size at the welding edge of the component before welding. Common groove types include I-grooves, V-grooves, and U-grooves. For example, when welding thicker T-shaped steel plates, to ensure complete weld penetration, a V-groove is usually machined at the edge of the steel plate, followed by multi-layer, multi-pass welding.

[0068] As an optional embodiment, the welding forms of the weld seam include side-by-side intermittent welding, staggered intermittent welding, and intermittent welding on one side and continuous welding on the other side.

[0069] Specifically, in actual welding operations, depending on different structural requirements, load-bearing requirements and construction conditions, there are a variety of welding forms to choose from. Among them, the more common ones include side-by-side intermittent welding, staggered intermittent welding, and intermittent welding on one side and continuous welding on the other side.

[0070] Parallel intermittent welding refers to arranging and welding multiple weld segments along the length of the weld seam in a parallel and equally spaced manner. In practice, welding is first performed on one side of the weld seam according to the predetermined weld segment length and spacing to form a row of weld points or weld segments. Then, welding of the same specifications is performed at the corresponding positions on the other side, so that the weld segments on both sides are distributed side by side.

[0071] refer to Figure 4 This is a schematic diagram of a T-shaped fillet weld with side-by-side intermittent welding (the number of side-by-side welds is odd) provided in an embodiment of the present invention.

[0072] At a T-shaped fillet weld, multiple weld segments are arranged and welded along the length of the weld in a parallel and equally spaced manner, and the total number of weld segments is odd.

[0073] As an optional embodiment, the component to be welded includes a first component 1 and a second component 2.

[0074] refer to Figure 5 This is a schematic diagram of a T-shaped fillet weld with side-by-side intermittent welding (the number of side-by-side welds is even) provided in an embodiment of the present invention.

[0075] Similar to intermittent welding with an odd number of weld segments, the difference is that the total number of weld segments is even. At T-shaped fillet welds, the weld segments on both sides are symmetrically arranged and welded in a parallel and equally spaced manner.

[0076] Staggered intermittent welding also employs the intermittent welding method, but unlike parallel intermittent welding, adjacent weld segments are not arranged side-by-side and aligned; instead, they are staggered by a certain distance. That is, after welding a section of weld on one side, welding is performed at the corresponding position on the other side at a certain distance, and then returning to the first side to continue welding at the new position. This cycle is repeated to form a staggered arrangement of welds.

[0077] refer to Figure 6 This is a schematic diagram of staggered intermittent welding of T-shaped fillet welds (the number of staggered welds is odd) provided in an embodiment of the present invention.

[0078] At the T-shaped fillet weld, a staggered intermittent welding method is used, and the total number of weld segments is odd. The adjacent weld segments are not arranged side by side and aligned, but are staggered by a certain distance. First, a weld segment is welded on one side, and then welded at the corresponding position on the other side at a certain distance. Then, the process is repeated on the first side to continue welding at the new position, thus forming a staggered weld arrangement.

[0079] refer to Figure 7 This is a schematic diagram of staggered intermittent welding of T-shaped fillet welds (the number of staggered welds is even) provided in an embodiment of the present invention.

[0080] Similar to staggered intermittent welding with an odd number of weld segments, the difference is that the total number of weld segments is even. At T-shaped fillet welds, adjacent weld segments are staggered by a certain distance, and the number of weld segments on both sides is symmetrical.

[0081] refer to Figure 8 This is a schematic diagram of a T-shaped fillet weld with intermittent welding on one side and continuous welding on the other side (the number of welds is odd) provided in an embodiment of the present invention.

[0082] This welding method involves intermittent welding on one side of the weld, welding according to a certain weld segment length and spacing; while on the other side, continuous welding is used to completely penetrate the entire weld length. Usually, intermittent welding on one side is performed first, followed by continuous welding on the other side.

[0083] refer to Figure 9 This is a schematic diagram of a T-groove weld with parallel intermittent welding (the number of parallel welds is odd) provided in an embodiment of the present invention.

[0084] At a T-groove weld, multiple weld segments are arranged parallel to each other and equally spaced along the length of the weld, with the total number of weld segments being odd. During operation, welding is first performed on one side of the groove according to the predetermined weld segment length and spacing, and then welding of the same specifications is performed at the corresponding position on the other side. However, because the number of weld segments is odd, the weld segments on both sides will not be completely symmetrically distributed.

[0085] Combination Figures 2-9 ,in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, This refers to the number of welds.

[0086] Continue to refer to Figure 1 Step S102: Construct a finite element model of the component to be welded based on the component size, and determine the load transferred by the weld based on the finite element model.

[0087] Specifically, the finite element model (FEM) is a numerical tool used in engineering analysis to simulate the mechanical behavior of complex structures. In the field of welding, it can predict the stress distribution, deformation, and fatigue life of welded components. The FEM can perform preprocessing operations on the input dimensions of the welded component. This requires simplifying the geometric model generated based on the component dimensions to produce the corresponding FEM model of the welded component. Preprocessing operations may include: assigning different material parameters to the welded component and the weld region; indexing and meshing the weld-connected components that need to be checked to ensure that the mesh density matches the weld and avoids excessive differences between the weld and mesh dimensions; and setting contact modes for the faces or nodes of the weld region.

[0088] As an optional embodiment, constructing a finite element model of the component to be welded based on the component size includes: constructing a finite element model of the first component based on the component size of the first component, constructing a finite element model of the second component based on the component size of the second component; establishing a connection between the finite element model of the first component and the finite element model of the second component through a binding contact, so as to simulate the welding conditions of the first component and the second component.

[0089] Specifically, in simulation analysis within the field of welding engineering, constructing an accurate finite element model is a crucial step in accurately simulating welding conditions and predicting welding quality and structural performance. Specifically, constructing a finite element model of the component to be welded based on its dimensions involves the following operations:

[0090] First, based on the actual dimensions of the first component, its corresponding finite element model is accurately constructed. This process requires comprehensive consideration of factors such as the component's geometry, dimensional accuracy, and material properties. Using professional finite element analysis software, the detailed dimensional parameters of the first component are input. The software discretizes the first component into a series of finite elements according to preset mesh generation rules. Each element has certain nodes, which describe the element's geometry and physical properties. Simultaneously, based on the material used in the first component, its finite element model is assigned corresponding material properties, such as elastic modulus, Poisson's ratio, and coefficient of thermal expansion, to ensure that the model accurately reflects the mechanical and thermal behavior of the first component during the welding process. Second, following the same method, its finite element model is constructed based on the dimensions of the second component. Similarly, the dimensional parameters of the second component must be accurately input, and a reasonable mesh generation and correct material properties must be assigned. Finally, the finite element models of the first and second components are connected through a bonded contact. A bonded contact is a special type of contact where the contact surfaces of the two components remain tightly connected throughout the simulation process, without relative sliding or separation. By setting up a binding contact, the actual connection between the first and second components during the welding process can be simulated, including the formation of the weld joint and the overall structural integrity after welding. When establishing the binding contact, it is necessary to accurately select the contact surfaces of the two components and set appropriate contact parameters to ensure the accuracy and reliability of the simulation. In this way, the welding conditions of the first and second components can be effectively simulated, providing strong support for subsequent welding process optimization and structural performance evaluation.

[0091] As an optional embodiment, determining the transmitted load of the weld based on the finite element model includes: extracting the nodal forces on the effective cross section of the weld based on the finite element model, the element load of the first element, and the element load of the second element; calculating the integral of the nodal forces on the effective cross section of the weld to determine the transmitted load of the weld.

[0092] Specifically, there are two methods for calculating the transmitted load:

[0093] 1. When the external load and structure are relatively simple and the load transfer path is relatively clear, theoretical calculation methods can be used to calculate the load based on the relevant formulas in theoretical mechanics of statics.

[0094] II. When external loads and structures are complex, and load transfer paths are unclear, theoretical calculations are insufficient to obtain the transferred loads of relevant welds. In such cases, numerical calculation methods are used. The advantage of this method is that it can handle complex working conditions and stress conditions at arbitrary locations on complex structures, and it can extract the transferred loads from different locations to verify the weld strength at different positions. The finite element method is the same as general finite element calculations, but it requires binding contact between different components at the location to be verified to facilitate the extraction of subsequent calculation results. After the calculation is completed, the nodal forces are extracted, and integration over the area yields the transferred load at the corresponding location (point O). .

[0095] In practical implementation, accurately determining the load transferred by the weld is crucial during the mechanical analysis and performance evaluation of welded structures. This directly relates to the accurate assessment of the weld joint's strength, stiffness, and overall structural stability. The following details the specific steps for determining the load transferred by the weld based on the finite element model:

[0096] First, based on the established finite element model and considering the loads borne by the first and second elements, the nodal forces on the effective weld section must be extracted. The finite element model is a discretized mathematical description of an actual welded structure. It simulates the mechanical behavior of the structure by dividing it into a finite number of elements and defining degrees of freedom at the element nodes. In this process, the loads borne by the first and second elements, such as concentrated forces, distributed forces, and bending moments, are transferred to each node through the calculations of the finite element model. The effective weld section refers to the section that actually bears the load transfer and plays a crucial role in the weld strength during the actual welding process. Using professional finite element analysis software, we can accurately locate each node on the effective weld section and extract the nodal forces borne by these nodes under stress, including the component forces in each direction, such as... , , The finite element method (FEM) involves several steps. First, after extracting the nodal forces on the effective weld section, it's necessary to calculate the integrals of these forces across the effective weld section to determine the transferred load. Integral operations are a crucial mathematical method for calculating physical quantities such as the area and volume of curves, surfaces, or solid figures. In FEM, by integrating the nodal forces across the effective weld section, discrete nodal forces can be transformed into a continuous cross-sectional load distribution. Specifically, the effective weld section can be divided into several small area elements. For each area element, the load borne by that area element is calculated based on the magnitude and direction of the nodal forces. Then, by summing the loads on all area elements (i.e., integrating), the transferred load across the entire effective weld section can be obtained. This transferred load comprehensively reflects the mechanical forces borne by the weld under actual working conditions, providing an important basis for subsequent welded structure strength assessment and optimization design.

[0097] As an optional embodiment, the transmitted load includes a first transmitted force and a first transmitted torque of the weld in a first direction, a second transmitted force and a second transmitted torque of the weld in a second direction, and a third transmitted force and a third transmitted torque of the weld in a third direction; the first direction is a direction perpendicular to the weld length and perpendicular to the first element, the second direction is a direction parallel to the weld length, and the third direction is a direction perpendicular to the weld length and perpendicular to the second element.

[0098] refer to Figure 2 and Figure 3 Calculate the load at point P based on the force translation. , These are force and torque, respectively; this load is the load that the weld needs to transmit. It is important to note that... The first direction is a direction perpendicular to both the weld length and the first component. The second direction is the direction parallel to the weld length. The third direction is perpendicular to both the weld length and the second component. Regardless of the method used to obtain the transferred load, its coordinate axis must be aligned with... Figure 2 Same. Among them, The first transmitted force of the weld in the first direction. This is the second transmitted force of the weld in the second direction. This represents the third transmitted force of the weld in the third direction. The first transmitted torque of the weld in the first direction, This is the second transmitted torque of the weld in the second direction. This is the third transmitted torque of the weld in the third direction.

[0099] Continue to refer to Figure 1 Step S103: Determine the section coefficient of the weld based on the component size and weld parameters.

[0100] Specifically, in the mechanical property analysis and strength assessment of welded structures, the section modulus is a crucial concept, playing an indispensable role in accurately calculating the load-bearing capacity of the weld and the stability of the structure. Specifically, the section modulus comprises the following important components:

[0101] The first is the area of ​​the effective cross-section of the weld. The effective cross-section of a weld refers to the portion of the cross-section that truly participates in load transfer and plays a decisive role in the weld strength during the welding process. In actual engineering, due to factors such as welding technology and weld shape, the actual stress-bearing cross-section of the weld is not the entire geometric cross-section of the weld. For example, in butt welds, defects such as incomplete penetration and porosity may exist, causing parts of the cross-section to be unable to effectively bear the load. Therefore, accurately determining the area of ​​the effective cross-section of the weld is the basis for calculating the section modulus. Typically, the effective cross-sectional range of the weld can be determined through metallographic examination and non-destructive testing, and then its area can be calculated.

[0102] Secondly, there is the moment of inertia of the weld about the first direction. The moment of inertia is a geometric quantity that measures the ability of a cross-section to resist bending deformation. In welded structures, the weld may be subjected to bending loads in different directions. The first direction is usually a pre-determined dominant bending direction based on the stress characteristics and design requirements of the structure. Calculating the moment of inertia of the weld about this direction requires considering the distance from the area of ​​each infinitesimal element on the effective cross-section of the weld to the neutral axis of that direction. By calculating the moment of inertia of the weld about the first direction, the weld's ability to resist bending deformation in that direction can be assessed, thus providing a basis for the bending strength design of the structure.

[0103] Thirdly, there is the moment of inertia of the weld about the second direction. The second direction is perpendicular to the first direction and is also the direction in which the structure may be subjected to bending loads. Similar to the method for calculating the moment of inertia in the first direction, calculating the moment of inertia of the weld about the second direction requires considering the distance from the area of ​​each infinitesimal element on the effective cross-section of the weld to the neutral axis in that direction. The moment of inertia of the weld about the second direction reflects the weld's ability to resist bending deformation in that direction, and is of great significance for comprehensively evaluating the bending performance of the weld and the overall stability of the structure.

[0104] like Figures 4-9 There are three main types of T-type intermittent welding: side-by-side intermittent welding, staggered intermittent welding, and welding intermittently on one side while continuing to weld on the other. The calculation formula for the section modulus differs for each type of intermittent welding.

[0105] As an optional embodiment, the section modulus includes the area of ​​the effective section of the weld. Moment of inertia of the weld about the first direction Moment of inertia of the weld about the second direction .

[0106] Combination Figure 2 and Figure 4 When T-type fillet welds are intermittently welded side-by-side (the number of side-by-side welds is odd), the section modulus is calculated as follows:

[0107]

[0108] in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, For the number of welds, The total length of the weld. For the weld throat dimensions, The effective cross-sectional area of ​​the weld is [area]. The number of intermittent welds. For weld seam Moment of inertia of the axis, For weld seam Moment of inertia of the axis.

[0109] Combination Figure 2 and Figure 5 When T-type fillet welds are intermittently welded side-by-side (the number of side-by-side welds is even), the section modulus is calculated as follows:

[0110]

[0111] in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, For the number of welds, The total length of the weld. For the weld throat dimensions, The effective cross-sectional area of ​​the weld is [area]. The number of intermittent welds. For weld seam Moment of inertia of the axis, For weld seam Moment of inertia of the axis.

[0112] Combination Figure 2 and Figure 6 When the T-type fillet welds are staggered and intermittent (the number of staggered welds is odd), the section modulus is calculated as follows:

[0113]

[0114] in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, For the number of welds, The total length of the weld. For the weld throat dimensions, The effective cross-sectional area of ​​the weld is [area]. The number of intermittent welds. For weld seam Moment of inertia of the axis, For weld seam Moment of inertia of the axis, This represents the neutral axis offset distance.

[0115] Combination Figure 2 and Figure 7 When the T-type fillet welds are staggered and intermittent (the number of staggered welds is even), the section modulus is calculated as follows:

[0116]

[0117] in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, For the number of welds, The total length of the weld. For the weld throat dimensions, The effective cross-sectional area of ​​the weld is [area]. The number of intermittent welds. For weld seam Moment of inertia of the axis, For weld seam Moment of inertia of the axis, This represents the neutral axis offset distance.

[0118] Combination Figure 2 and Figure 8 When a T-shaped fillet weld is intermittently welded on one side and continuously welded on the other side (the number of welds is odd), the section modulus is calculated as follows:

[0119]

[0120] in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, For the number of welds, The total length of the weld. For the weld throat dimensions, The effective cross-sectional area of ​​the weld is [area]. The number of intermittent welds. For weld seam Moment of inertia of the axis, For weld seam Moment of inertia of the axis, This represents the neutral axis offset distance.

[0121] Combination Figure 2 and Figure 9 When T-groove welding involves parallel intermittent welding (with an odd number of parallel welds), the weld throat size is: Here, only intermittent welding along the side is used. Taking an odd number as an example, the calculation of the section modulus is given below (the formulas for the section modulus of other forms of open-groove intermittent welds can be derived by analogy and will not be repeated):

[0122]

[0123] in, The total length of the first component 1 in the welding direction. This refers to the weld length of each segment in a T-type intermittent weld. The weld spacing between each weld seam. This refers to the weld leg size of the weld. The thickness of the first element 1, The height of the first element 1, For the number of welds, The total length of the weld. For the weld throat dimensions, The effective cross-sectional area of ​​the weld is [area]. The number of intermittent welds. For weld seam Moment of inertia of the axis, For weld seam Moment of inertia of the axis.

[0124] Continue to refer to Figure 1 Step S104: Determine the normal stress and shear stress of the weld based on the transmitted load, weld parameters and section modulus.

[0125] Specifically, normal stress can be understood as stress perpendicular to the effective cross-section of the weld, mainly caused by axial force and bending moment, which leads to tensile or compressive failure of the weld. Shear stress can be understood as stress parallel to the effective cross-section of the weld, mainly caused by shear force, which leads to shear failure of the weld.

[0126] As an optional embodiment, the normal stress and shear stress of the weld are determined based on the transmitted load, weld parameters, and section modulus, including: determining the shear stress of the weld in the first direction based on the first transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the number of welds; and determining the shear stress of the weld in the second direction based on the second transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the element size of the first element.

[0127] Combination Figure 2 and Figure 3 Here, only intermittent welding along the side is used. Taking an odd number as an example, the normal stress and shear stress of the weld are calculated as follows:

[0128]

[0129] in, This represents the shear stress of the weld in the first direction; This represents the shear stress of the weld in the second direction. This represents the normal stress of the weld in the third direction.

[0130] Continue to refer to Figure 1 Step S105: Determine the membrane stress of the weld and the sum of the membrane stress and bending stress based on the normal stress and shear stress.

[0131] As an optional embodiment, determining the membrane stress of the weld and the sum of the membrane stress and bending stress based on the normal stress and shear stress includes: determining the membrane stress and the sum of the membrane stress and bending stress based on the normal stress perpendicular to the effective cross section of the weld, the shear stress parallel to the effective cross section of the weld, and the shear stress parallel to the length of the weld.

[0132] Specifically, membrane stress refers to the stress uniformly distributed along the effective cross-section of the weld, reflecting the average tensile, compressive, or shear forces borne by the weld as a whole. Membrane stress is a relatively uniform stress state generated inside the weld when the structure is under load, and it is of great significance for assessing the overall load-bearing capacity of the weld.

[0133] Bending stress is the stress generated by the bending deformation of the weld caused by load. Its magnitude is linearly distributed along the height of the weld section, reaching its maximum value at the edge of the weld. Bending stress reflects the local stress concentration of the weld under bending load.

[0134] Membrane stress The calculation is as follows:

[0135]

[0136]

[0137]

[0138] Membrane stress + bending stress The calculation is as follows:

[0139]

[0140]

[0141]

[0142] In the formula, These are: normal stress perpendicular to the effective cross-section of the weld, shear stress parallel to the effective cross-section of the weld, and shear stress parallel to the length of the weld. Among them, It is the sum of the normal stress and bending stress perpendicular to the effective cross section of the weld; It is the sum of the shear stress and bending stress parallel to the effective cross section of the weld; It is the sum of shear stress and bending stress parallel to the weld length direction.

[0143] Continue to refer to Figure 1 Step S106: Calculate the safety factor of the weld based on the membrane stress and the sum of the membrane stress and the bending stress, and verify the weld parameters based on the safety factor.

[0144] Specifically, the safety factor is an important indicator for measuring the strength and safety of a weld. It represents the ratio of the allowable stress of the weld material to the actual working stress. The larger the safety factor, the more sufficient the strength reserve of the weld, and the higher its safety.

[0145] As an optional embodiment, the safety factor of the weld is calculated based on the membrane stress and the sum of the membrane stress and the bending stress, including: determining a first safety factor of the membrane stress based on the membrane stress, and determining a second safety factor of the bending stress based on the bending stress.

[0146] Calculate the safety factor of the weld and The calculation method and requirements are as follows:

[0147]

[0148]

[0149] In the formula, The joint coefficient is 0.5 in this embodiment of the invention, and 0.75 for fillet welds and non-full penetration fillet welds. This represents the allowable stress of the material at the design temperature.

[0150] refer to Figure 10 This is a schematic diagram of the weld inspection process provided in an embodiment of the present invention.

[0151] As an optional embodiment, the weld parameters are verified according to the safety factor, including: when the first safety factor is greater than or equal to the first preset safety factor and the second safety factor is greater than or equal to the second preset safety factor, the weld parameters are determined to pass the verification; when the first safety factor is less than the first preset safety factor or the second safety factor is less than the second preset safety factor, the weld parameters are determined to fail the verification.

[0152] Specifically, the relationship between the first safety factor and the first preset safety factor is compared, and the relationship between the second safety factor and the second preset safety factor is also compared. If the first safety factor is greater than or equal to the first preset safety factor, and the second safety factor is greater than or equal to the second preset safety factor, then the weld parameters are deemed to have passed the verification, indicating that the weld meets safety requirements under the current parameters and can be constructed or used according to the design. If the first safety factor is less than the first preset safety factor, or the second safety factor is less than the second preset safety factor, then the weld parameters are deemed to have failed the verification, meaning that there are safety hazards in the weld under the current parameters, and the weld parameters need to be adjusted and optimized.

[0153] As an optional embodiment, the method further includes: adjusting the weld parameters; and re-verifying the adjusted weld parameters until the adjusted weld parameters pass the verification.

[0154] Specifically, when weld parameters fail the verification, adjustments need to be made according to the specific circumstances. Common adjustment methods include increasing weld size (e.g., increasing weld leg size, increasing weld length), changing weld type (e.g., changing butt welds to fillet welds), and selecting higher strength welding materials or base materials. After adjusting the weld parameters, stress calculations and safety factor verifications need to be performed again until the weld parameters meet the verification requirements.

[0155] As can be seen from the above, the T-type intermittent weld verification method provided by this invention first obtains the component dimensions and welding conditions of the component to be welded, and determines the weld parameters based on the component dimensions and welding conditions; then, a finite element model of the component to be welded is constructed based on the component dimensions, and the transmitted load of the weld is determined based on the finite element model; then, the section modulus of the weld is determined based on the component dimensions and weld parameters; then, the normal stress and shear stress of the weld are determined based on the transmitted load, weld parameters, and section modulus; further, the membrane stress and the sum of the membrane stress and bending stress of the weld are determined based on the normal stress and shear stress; finally, the safety factor of the weld is calculated based on the membrane stress and the sum of the membrane stress and bending stress, and the weld parameters are verified based on the safety factor. This invention performs mechanical analysis on the structure of the component to be welded, determines the intermittent welding method, obtains the weld parameters and extracts the transmitted load of the weld to be verified, calculates the membrane stress and bending stress of the weld using the stress classification method, determines the safety factor corresponding to the membrane stress and bending stress, and completes the strength verification of the weld based on the safety factor. This invention can accurately adjust and verify weld parameters until the weld parameters that meet the weld strength requirements are determined, thereby improving the accuracy of weld verification for T-type intermittent welding, precisely quantifying weld parameters, and having a fast calculation speed and high reliability. At the same time, it effectively reduces the welding deformation of structural components.

[0156] Based on the same inventive concept, corresponding to the T-type intermittent weld seam inspection method of any of the above embodiments, the present invention also provides a computer-readable storage medium storing computer instructions for causing a computer to execute the T-type intermittent weld seam inspection method of any of the above embodiments.

[0157] The aforementioned computer-readable storage medium can be any available medium or data storage device that a computer can access, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0158] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0159] The computer instructions stored in the computer-readable storage medium of the above embodiments are used to cause a computer to execute the T-type intermittent weld seam verification method of any embodiment in the exemplary method section above. First, the component dimensions and welding conditions of the component to be welded are obtained, and the weld seam parameters are determined based on the component dimensions and welding conditions. Then, a finite element model of the component to be welded is constructed based on the component dimensions, and the transmitted load of the weld is determined based on the finite element model. Then, the section modulus of the weld is determined based on the component dimensions and weld seam parameters. Then, the normal stress and shear stress of the weld are determined based on the transmitted load, weld seam parameters, and section modulus. Further, the membrane stress and the sum of the membrane stress and bending stress of the weld are determined based on the normal stress and shear stress. Finally, the safety factor of the weld is calculated based on the membrane stress and the sum of the membrane stress and bending stress, and the weld seam parameters are verified based on the safety factor. This invention performs mechanical analysis on the structure of the component to be welded, determines the intermittent welding method, obtains the weld parameters, extracts the transferred load of the weld to be checked, calculates the membrane stress and bending stress of the weld using the stress classification method, and determines the corresponding safety factors for the membrane stress and bending stress. Based on the safety factors, the strength of the weld is checked. This invention can accurately adjust and verify the weld parameters until the weld parameters that meet the weld strength requirements are determined, improving the accuracy of weld check for T-type intermittent welding, precisely quantifying the weld parameters, with fast calculation speed, high reliability of results, and effectively reducing welding deformation of structural components.

[0160] Based on the same concept, corresponding to the T-type intermittent weld seam verification method provided in any of the above embodiments, the present invention also provides a T-type intermittent weld seam verification system, including a processor and a memory, wherein the memory stores programs or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the T-type intermittent weld seam verification method as in the first aspect are implemented.

[0161] Figure 11 This embodiment illustrates a more specific structural diagram of a T-type intermittent weld seam verification system. The system may include: a processor 1110, a memory 1120, an input / output interface 1130, a communication interface 1140, and a bus 1150. The processor 1110, memory 1120, input / output interface 1130, and communication interface 1140 are interconnected internally via the bus 1150.

[0162] The processor 1110 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification. The memory 1120 can be implemented using ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 1120 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1120 and called and executed by the processor 1110. The input / output interface 1130 is used to connect input / output modules to realize information input and output. The input / output modules can be configured as components in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices can include keyboards, mice, touch screens, microphones, various sensors, etc., and output devices can include displays, speakers, vibrators, indicator lights, etc. Communication interface 1140 is used to connect a communication module (not shown) to enable communication between this device and other devices. The communication module can communicate via wired means (e.g., USB, Ethernet cable) or wireless means (e.g., mobile network, Wi-Fi, Bluetooth). Bus 1150 includes a pathway for transmitting information between various components of the device (e.g., processor 1110, memory 1120, input / output interface 1130, and communication interface 1140).

[0163] It should be noted that although the above-described device only shows the processor 1110, memory 1120, input / output interface 1130, communication interface 1140, and bus 1150, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0164] The T-type intermittent weld seam verification system of the above embodiments is used to implement the corresponding T-type intermittent weld seam verification method in any of the foregoing embodiments, and has the beneficial effects of the corresponding T-type intermittent weld seam verification method embodiments, which will not be repeated here.

[0165] refer to Figure 12 This is a schematic diagram of the T-type intermittent weld seam inspection device provided in an embodiment of the present invention.

[0166] Based on the same concept, corresponding to the T-type intermittent weld seam inspection method provided in any of the above embodiments, the present invention also provides a T-type intermittent weld seam inspection device 1200.

[0167] The T-type intermittent weld seam verification device 1200 includes: an acquisition module 1210, a construction module 1220, a determination module 1230, a first calculation module 1240, a second calculation module 1250, and a verification module 1260. The acquisition module 1210 is configured to acquire the component dimensions and welding conditions of the component to be welded, and determine the weld parameters based on the component dimensions and welding conditions; the construction module 1220 is configured to construct a finite element model of the component to be welded based on the component dimensions, and determine the transmitted load of the weld based on the finite element model; the determination module 1230 is configured to determine the section modulus of the weld based on the component dimensions and weld parameters; the first calculation module 1240 is configured to determine the normal stress and shear stress of the weld based on the transmitted load, weld parameters, and section modulus; the first calculation module 1250 is configured to determine the membrane stress and the sum of the membrane stress and bending stress of the weld based on the normal stress and shear stress; and the verification module 1260 is configured to calculate the safety factor of the weld based on the membrane stress and the sum of the membrane stress and bending stress, and verify the weld parameters based on the safety factor.

[0168] Optionally, the components to be welded include a first component and a second component;

[0169] The assembly module 1220 is further configured to: construct a finite element model of the first element based on the element size of the first element, construct a finite element model of the second element based on the element size of the second element; and establish a connection between the finite element model of the first element and the finite element model of the second element through a binding contact, so as to simulate the welding conditions of the first element and the second element.

[0170] Optionally, the assembly module 1220 is further configured as follows:

[0171] The nodal forces on the effective section of the weld are extracted based on the finite element model, the element load of the first element, and the element load of the second element; the integral of the nodal forces on the effective section of the weld is calculated to determine the transmitted load of the weld.

[0172] Optionally, weld parameters include weld leg size, weld length, and weld spacing between each weld.

[0173] Optionally, the weld type can include T-type fillet welds or T-type groove welds.

[0174] Optionally, the welding forms of the weld seam include side-by-side intermittent welding, staggered intermittent welding, and intermittent welding on one side and continuous welding on the other side.

[0175] Optionally, the transmitted load includes a first transmitted force and a first transmitted torque of the weld in a first direction, a second transmitted force and a second transmitted torque of the weld in a second direction, and a third transmitted force and a third transmitted torque of the weld in a third direction; the first direction is a direction perpendicular to the weld length and perpendicular to the first element, the second direction is a direction parallel to the weld length, and the third direction is a direction perpendicular to the weld length and perpendicular to the second element.

[0176] Optionally, the section modulus includes the area of ​​the effective section of the weld, the moment of inertia of the weld about the first direction, and the moment of inertia of the weld about the second direction.

[0177] Optionally, the first computing module 1240 is further configured to:

[0178] The shear stress of the weld in the first direction is determined based on the first transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the number of welds.

[0179] The shear stress of the weld in the second direction is determined based on the second transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the component dimensions of the first component.

[0180] Optionally, the second computing module 1250 is further configured to:

[0181] The membrane stress and the sum of the membrane stress and bending stress are determined based on the normal stress perpendicular to the effective section of the weld, the shear stress parallel to the effective section of the weld, and the shear stress parallel to the length of the weld.

[0182] Optionally, the verification module 1260 is further configured to:

[0183] The first safety factor for membrane stress is determined based on membrane stress, and the second safety factor for bending stress is determined based on bending stress.

[0184] Optionally, the verification module 1260 is further configured to:

[0185] When the first safety factor is greater than or equal to the first preset safety factor and the second safety factor is greater than or equal to the second preset safety factor, the weld parameters are determined to have passed the verification; when the first safety factor is less than the first preset safety factor or the second safety factor is less than the second preset safety factor, the weld parameters are determined to have failed the verification.

[0186] Optionally, the verification module 1260 is further configured to:

[0187] Adjust the weld parameters; re-verify the adjusted weld parameters until they pass the verification.

[0188] It should be noted that the specific implementation of the T-type intermittent weld seam verification device 1200 in this embodiment of the invention can be found in the specific implementation of the T-type intermittent weld seam verification method in the above embodiments. To avoid redundancy, it will not be described again here.

[0189] In summary, the T-type intermittent weld seam verification device provided in this embodiment of the invention first obtains the component dimensions and welding conditions of the component to be welded, and determines the weld seam parameters based on the component dimensions and welding conditions; then, it constructs a finite element model of the component to be welded based on the component dimensions, and determines the transmitted load of the weld seam based on the finite element model; then, it determines the section modulus of the weld seam based on the component dimensions and weld seam parameters; then, it determines the normal stress and shear stress of the weld seam based on the transmitted load, weld seam parameters, and section modulus; further, it determines the membrane stress and the sum of the membrane stress and bending stress of the weld seam based on the normal stress and shear stress; finally, it calculates the safety factor of the weld seam based on the membrane stress and the sum of the membrane stress and bending stress, and verifies the weld seam parameters based on the safety factor. This invention performs mechanical analysis on the structure of the component to be welded, determines the intermittent welding method, obtains the weld seam parameters, extracts the transmitted load of the weld seam to be verified, calculates the membrane stress and bending stress of the weld seam using the stress classification method, determines the safety factor corresponding to the membrane stress and bending stress, and completes the strength verification of the weld seam based on the safety factor. This invention can accurately adjust and verify weld parameters until the weld parameters that meet the weld strength requirements are determined, thereby improving the accuracy of weld verification for T-type intermittent welding, precisely quantifying weld parameters, and having a fast calculation speed and high reliability. At the same time, it effectively reduces the welding deformation of structural components.

[0190] refer to Figure 13 This is a schematic diagram of the T-type intermittent weld seam inspection device provided in an embodiment of the present invention.

[0191] Based on the same inventive concept, corresponding to the T-type intermittent weld seam verification method in any of the above embodiments, the present invention also proposes a T-type intermittent weld seam verification device 1300. The T-type intermittent weld seam verification device 1300 includes the T-type intermittent weld seam verification device 1200 in the above embodiments, and has the beneficial effects of the corresponding T-type intermittent weld seam verification method embodiments, which will not be repeated here.

[0192] Furthermore, the other components and functions of the T-type intermittent weld seam inspection device in the embodiments of the present invention are known to those skilled in the art, and will not be described in detail here to reduce redundancy.

[0193] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0194] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0195] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0196] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for inspecting T-type intermittent weld seams, characterized in that, include: Obtain the component dimensions and welding conditions of the component to be welded, and determine the weld parameters based on the component dimensions and welding conditions; A finite element model of the component to be welded is constructed based on the component dimensions, and the load transferred in the weld is determined based on the finite element model. The transmitted load includes a first transmitted force and a first transmitted torque of the weld in a first direction, a second transmitted force and a second transmitted torque of the weld in a second direction, and a third transmitted force and a third transmitted torque of the weld in a third direction; the first direction is a direction perpendicular to the weld length and perpendicular to the first component, the second direction is a direction parallel to the weld length, and the third direction is a direction perpendicular to the weld length and perpendicular to the second component. The section modulus of the weld is determined based on the component dimensions and the weld parameters; the section modulus includes the area of ​​the effective section of the weld, the moment of inertia of the weld about the first direction, and the moment of inertia of the weld about the second direction. Determining the normal stress and shear stress of the weld based on the transmitted load, the weld parameters, and the section modulus includes: determining the shear stress of the weld in a first direction based on the first transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the number of welds; and determining the shear stress of the weld in a second direction based on the second transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the component size of the first component. The membrane stress of the weld and the sum of the membrane stress and the bending stress are determined based on the normal stress and the shear stress. The safety factor of the weld is calculated based on the membrane stress and the sum of the membrane stress and the bending stress, and the weld parameters are verified based on the safety factor.

2. The method for inspecting T-type intermittent welds according to claim 1, characterized in that, The component to be welded includes a first component and a second component; The step of constructing the finite element model of the component to be welded based on the component dimensions includes: A finite element model of the first element is constructed based on the element dimensions of the first element, and a finite element model of the second element is constructed based on the element dimensions of the second element. The finite element models of the first component and the second component are connected by a binding contact to simulate the welding conditions of the first component and the second component.

3. The method for inspecting T-type intermittent welds according to claim 2, characterized in that, The determination of the transferred load of the weld based on the finite element model includes: The nodal forces on the effective section of the weld are extracted based on the finite element model, the element load of the first element, and the element load of the second element. The integral of the nodal force over the effective cross section of the weld is calculated to determine the transmitted load of the weld.

4. The method for inspecting T-type intermittent welds according to claim 1, characterized in that, The weld parameters include weld leg size, weld length, and weld spacing between each weld.

5. The method for inspecting T-type intermittent welds according to claim 1, characterized in that, The types of welds include T-type fillet welds or T-type groove welds.

6. The method for inspecting T-type intermittent welds according to claim 1, characterized in that, The welding forms of the welds include side-by-side intermittent welding, staggered intermittent welding, and intermittent welding on one side and continuous welding on the other side.

7. The method for inspecting T-type intermittent welds according to claim 1, characterized in that, The determination of the membrane stress of the weld and the sum of the membrane stress and bending stress based on the normal stress and the shear stress includes: The membrane stress and the sum of the membrane stress and the bending stress are determined based on the normal stress perpendicular to the effective section of the weld, the shear stress parallel to the effective section of the weld, and the shear stress parallel to the length of the weld.

8. The method for inspecting T-type intermittent welds according to claim 7, characterized in that, The calculation of the weld safety factor based on the membrane stress and the sum of the membrane stress and the bending stress includes: A first safety factor for the membrane stress is determined based on the membrane stress, and a second safety factor for the bending stress is determined based on the bending stress.

9. The method for inspecting T-type intermittent welds according to claim 8, characterized in that, The step of verifying the weld parameters based on the safety factor includes: When the first safety factor is greater than or equal to the first preset safety factor, and the second safety factor is greater than or equal to the second preset safety factor, the weld parameters are determined to have passed the verification. If the first safety factor is less than the first preset safety factor, or the second safety factor is less than the second preset safety factor, the weld parameters are determined to have failed the verification.

10. The method for inspecting T-type intermittent welds according to claim 9, characterized in that, The method further includes: Adjust the weld parameters; The adjusted weld parameters are re-verified until they pass the verification.

11. A computer-readable storage medium, characterized in that, It stores a T-type intermittent weld seam verification program, which, when executed by the processor, implements the T-type intermittent weld seam verification method according to any one of claims 1-10.

12. A T-type intermittent weld seam verification system, characterized in that, The device includes a memory and a processor. When the processor executes the T-type intermittent weld seam verification program stored in the memory, it implements the T-type intermittent weld seam verification method according to any one of claims 1-10.

13. A T-type intermittent weld inspection device, characterized in that, The device includes: The acquisition module is configured to acquire the component size and welding conditions of the component to be welded, and determine the weld parameters of the weld seam based on the component size and the welding conditions. The assembly module is configured to construct a finite element model of the component to be welded based on the component dimensions, and determine the transmitted load of the weld seam based on the finite element model; the transmitted load includes a first transmitted force and a first transmitted torque of the weld seam in a first direction, a second transmitted force and a second transmitted torque of the weld seam in a second direction, and a third transmitted force and a third transmitted torque of the weld seam in a third direction; the first direction is a direction perpendicular to the weld seam length and perpendicular to the first component, the second direction is a direction parallel to the weld seam length, and the third direction is a direction perpendicular to the weld seam length and perpendicular to the second component; The determining module is configured to determine the section modulus of the weld based on the component dimensions and the weld parameters; the section modulus includes the area of ​​the effective section of the weld, the moment of inertia of the weld about the first direction, and the moment of inertia of the weld about the second direction. The first calculation module is configured to determine the normal stress and shear stress of the weld based on the transmitted load, the weld parameters, and the section modulus, including: determining the shear stress of the weld in a first direction based on the first transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the number of welds; and determining the shear stress of the weld in a second direction based on the second transmitted force, the third transmitted torque, the section modulus, the weld parameters, and the element size of the first element. The first calculation module is configured to determine the membrane stress of the weld and the sum of the membrane stress and the bending stress based on the normal stress and the shear stress. The verification module is configured to calculate the safety factor of the weld based on the membrane stress and the sum of the membrane stress and the bending stress, and to verify the weld parameters based on the safety factor.

14. A T-type intermittent weld inspection device, characterized in that, Includes the T-type intermittent weld inspection device as described in claim 13.

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