Rib plate welding scheme design method

Abstract

The invention provides a rib plate welding scheme design method. A rib plate comprises a bottom plate formed by welding a plurality of sub-plates and a plurality of reinforcing ribs welded to the surface of the bottom plate. The rib plate welding scheme design method comprises the steps that a plurality of candidate welding groove angles are selected for a sub-plate; establishing each candidate bottom plate finite element model; welding parameters are determined; performing finite element analysis on each candidate bottom plate finite element model; performing comprehensive scoring on each candidate bottom plate finite element model to obtain a final bottom plate finite element model and a final welding groove angle; selecting a plurality of candidate welding sequences for reinforcing rib welding operation; establishing a rib plate finite element model; performing comprehensive scoring on each candidate welding sequence to obtain a final welding sequence; arranging to form a rib plate welding scheme. According to the technical scheme, the most appropriate daughter board welding groove angle and the welding sequence of the reinforcing ribs can be selected in a quantitative analysis mode, the welding quality of the rib plates is improved, and the structural strength and navigation safety of a ship are better ensured.

Description

Technical Field

[0001] The present application relates to the field of shipbuilding, and more particularly, to a method for designing a stiffener welding scheme. Background Art

[0002] The aluminum alloy stiffener structure is a type of structure widely used in modern ships and is commonly used in various important parts such as the side plates of the ship's hull, the outer bottom plate of the ship, and the deck. Aluminum alloy materials have many excellent properties such as low density, high strength, and corrosion resistance, and are the key materials for realizing ship lightweight, fast navigation, and agility. During the shipbuilding process, multiple aluminum alloy plates are usually welded together to form a whole bottom plate, and then multiple stiffeners are welded on the bottom plate to form a stiffener to increase the overall structural strength. Due to the characteristics of the thermophysical properties of aluminum alloy materials themselves, after welding, phenomena such as wave deformation, warping at the edge of the bottom plate, and thin-horse deformation of the bottom plate within the frame may occur, affecting the structural strength and navigation safety of the ship. Moreover, dealing with welding deformation will consume a large amount of manpower and material resources, increasing the shipbuilding cycle and cost.

[0003] During the actual shipbuilding process, usually by designing reasonable welding joints and the welding sequence of stiffeners, the problems of heat stress concentration and residual stress generated during welding can be reduced, and serious welding deformation can be avoided. However, in the prior art, usually within the welding groove angle range provided by the classification society specifications and shipyard practices, the welding groove angle between each aluminum alloy plate in the bottom plate is determined based on past construction experience, and the welding sequence of the stiffeners is also determined based on past construction experience. When building large and complex ships, it is difficult to find the optimal welding groove angle and welding sequence through these methods, and the problem of welding deformation cannot be effectively solved, which may have a negative impact on the structural strength and navigation safety of the ship. Therefore, a scientific and effective method is needed to formulate a stiffener welding scheme to minimize the occurrence of welding deformation problems through the selected welding groove angle and the welding sequence of stiffeners. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a method for designing a stiffener welding scheme, which can select the most suitable welding groove angle of the sub-plate and the welding sequence of the stiffeners through quantitative analysis, improve the quality of stiffener welding, and better ensure the structural strength and navigation safety of the ship.

[0005] The present application provides a method for designing a stiffener welding scheme, wherein the stiffener includes a bottom plate formed by welding multiple sub-plates and multiple stiffeners welded on the surface of the bottom plate; the method for designing a stiffener welding scheme includes:

[0006] S1. Select multiple candidate welding groove angles for the sub-plates within the welding groove angle range specified by the ship design specifications;

[0007] S2. Select a candidate welding groove angle, establish finite element models for each sub-plate to be welded in finite element analysis software, and arrange all the sub-plate finite element models in a preset manner to form a candidate bottom plate finite element model; repeat this step for all candidate welding groove angles to obtain the corresponding candidate bottom plate finite element models respectively.

[0008] S3. Determine each welding parameter of the welding process according to the thermophysical parameters of the rib plate material.

[0009] S4. In the finite element analysis software, use each welding parameter as a boundary condition to perform finite element analysis on each candidate bottom plate finite element model respectively, and obtain the bottom plate deformation data and the bottom plate residual stress distribution data of each candidate bottom plate finite element model.

[0010] S5. Conduct a comprehensive score for each candidate bottom plate finite element model by combining all bottom plate influencing factors, select the candidate bottom plate finite element model with the highest score as the final bottom plate finite element model, and obtain the corresponding final welding groove angle; the bottom plate influencing factors include the bottom plate deformation data, the bottom plate residual stress distribution data, and one or more non-bottom plate deformation factors.

[0011] S6. According to the requirements of the ship design specification and the on-site construction conditions, select multiple candidate welding sequences for the stiffener welding operation.

[0012] S7. Establish finite element models for each stiffener to be welded in the finite element analysis software, and arrange each stiffener finite element model above the final bottom plate finite element model in a preset manner to form a stiffener finite element model.

[0013] S8. Select a candidate welding sequence, use each welding parameter as a boundary condition to perform finite element analysis on the stiffener finite element model, and obtain the welding deformation data; repeat this step for each candidate welding sequence to obtain the stiffener deformation data and the stiffener deformation trend under each candidate welding sequence respectively.

[0014] S9. Conduct a comprehensive score for each candidate welding sequence by combining all stiffener influencing factors, and select the candidate welding sequence with the highest score as the final welding sequence; the stiffener influencing factors include the stiffener deformation data, the stiffener deformation trend, and one or more non-stiffener deformation factors.

[0015] S10. Organize the final welding groove angle and the final welding sequence to form a stiffener welding plan.

[0016] In an implementable solution, in step S1, within the range of welding groove angles specified by the ship design specification requirements, select multiple candidate welding groove angles at the same angular interval.

[0017] In an implementable solution, when performing the daughter board welding operation, a V-shaped welding groove is adopted between adjacent daughter boards, and the welding groove gap is 1 mm.

[0018] In an implementable solution, the hexahedral mesh is adopted for the daughter board finite element model and / or the stiffener finite element model, and the mesh refinement treatment is carried out in the area close to the weld seam.

[0019] In an implementable solution, the thermophysical parameters in step S3 at least include the linear expansion coefficient, specific heat capacity, thermal conductivity, elastic modulus and Poisson's ratio.

[0020] In an implementable solution, the welding parameters in step S3 at least include the welding current, welding voltage, welding speed, welding thermal efficiency, welding heat source size and various external constraint conditions during the welding process.

[0021] In an implementable solution, the non-bottom plate deformation factors in step S5 at least include the welding cost, welding efficiency and weld mechanical properties of the candidate bottom plate finite element model.

[0022] In an implementable solution, the non-stiffener deformation factors in step S9 at least include the welding cost, welding efficiency and weld mechanical properties of the stiffener finite element model.

[0023] In an implementable solution, in step S5, first select a candidate bottom plate finite element model, and quantify each bottom plate influence factor respectively to obtain the corresponding influence score D of each bottom plate influence factor ij , and then calculate the comprehensive score D of the candidate bottom plate finite element model through the following formula i , and organize the comprehensive scores D of all candidate bottom plate finite element models i to form a score set D:

[0024]

[0025] where the total number of candidate bottom plate finite element models is m, the total number of bottom plate influence factors is n, and K ij is the weight coefficient corresponding to the influence score D ij ; finally, select the candidate bottom plate finite element model corresponding to the highest comprehensive score D i in the score set D as the final bottom plate finite element model, and obtain the corresponding final welding groove angle.

[0026] In an implementable solution, in step S9, first select a candidate welding sequence, and quantify each stiffener influence factor respectively to obtain the corresponding influence score S of each stiffener influence factor ik, and then the comprehensive score S of the candidate welding sequence is calculated by the following formula i , and the comprehensive scores S of all candidate bottom plate finite element models i are sorted to form a score set S:

[0027]

[0028] Among them, the total number of candidate welding sequences is a, and the total number of stiffener influence factors is b. F ij is the weight coefficient corresponding to the influence score S ij ; finally, the candidate bottom plate finite element model corresponding to the highest comprehensive score S i in the score set S is selected as the final bottom plate finite element model, and the corresponding final welding groove angle is obtained.

[0029] Compared with the prior art, the beneficial effects of this application at least include:

[0030] This application provides a design method for the stiffener welding scheme. It selects multiple candidate welding groove angles for the sub-plate within the range of welding groove angles specified by the ship design specifications, and quantitatively analyzes each candidate welding groove angle through finite element analysis. Then, the most suitable welding groove angle is selected by means of comprehensive scoring. This method overcomes the limitations and uncertainties of only relying on experience to select the welding groove angle in the traditional design method, can accurately evaluate the influence of different groove angles on welding deformation and residual stress distribution, and by introducing non-bottom plate deformation factors, the stiffener welding scheme design method of this application can optimize the welding groove design in multiple dimensions to ensure the balance of factors such as welding quality and economic benefits. Similarly, the stiffener welding scheme design method of this application can also accurately select the most suitable welding sequence, thereby effectively improving the welding quality of the stiffener and better ensuring the structural strength and navigation safety of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of this application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0032] Figure 1 is a schematic flow chart of the stiffener welding scheme design method shown in the embodiments of this application;

[0033] Figure 2 is a schematic diagram of welding two sub-plate finite element models;

[0034] Figure 3Schematic diagram for welding the stiffener finite element model and the bottom plate finite element model;

[0035] Figure 4 Schematic diagram of the welding groove angle scheme.

[0036] In the figure: 1, sub-plate; 2, bottom plate; 3, stiffener; 4, rib plate; 5, groove; 6, weld seam. Specific implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the protection scope of the present application.

[0039] The present application provides a design method for a rib plate welding scheme. As Figures 2 - 4 shown, the rib plate 4 includes a bottom plate 2 formed by welding a plurality of sub-plates 1 and a plurality of stiffeners 3 welded to the surface of the bottom plate 2. As Figure 1 shown, the design method for the rib plate welding scheme includes the following steps:

[0040] S1. Select a plurality of candidate welding groove angles for the sub-plates within the welding groove angle range specified by the ship design specifications. Specifically, a plurality of candidate welding groove angles can be selected at the same angular interval within the specified welding groove angle range. For example, for a 10-mm-thick aluminum alloy sub-plate, the welding groove angle range specified by the ship design specifications is 40° - 70°. As Figure 4 shown, 40°, 50°, 60°, and 70° can be selected as the candidate welding groove angles respectively. In addition, other angle selection methods can also be adopted, and specific details are not limited here.

[0041] S2. Select a candidate welding groove angle, establish finite element models for each sub-plate to be welded in a finite element analysis software respectively, and arrange all the sub-plate finite element models in a preset manner to form a candidate bottom plate finite element model; repeat this step for all candidate welding groove angles to obtain the corresponding candidate bottom plate finite element models respectively. Specifically, the MSC Apex software can be used to perform 1:1 modeling and mesh generation on the sub-plates. AsFigure 2 As shown, the sub - plate finite element model preferably uses hexahedral meshes. Hexahedral meshes have many advantages such as high calculation accuracy, good mesh quality, high calculation efficiency, adaptability to complex geometries, convenient post - processing, and suitability for multi - physical - field coupling, and are very suitable for thermo - structural coupling analysis during the welding process. The sub - plate finite element model can be refined in the area close to the weld. The farther the area is from the weld zone, the larger the mesh size, but it should be ensured that the size ratio of adjacent meshes does not exceed 2. This processing method can ensure the calculation accuracy at the weld while effectively reducing the overall calculation workload, thus improving work efficiency.

[0042] S3. Determine the welding parameters of the welding process according to the thermophysical parameters of the rib plate material. Specifically, the thermophysical parameters include but are not limited to the coefficient of linear expansion, specific heat capacity, thermal conductivity, elastic modulus, and Poisson's ratio, and these parameters can usually be obtained from material handbooks, experimental tests, or the material libraries of finite element analysis software. The welding parameters may include but are not limited to welding current, welding voltage, welding speed, welding thermal efficiency, welding heat source size, and various external constraint conditions during the welding process.

[0043] S4. In the finite element analysis software, use the welding parameters determined in step S3 as boundary conditions, and perform finite element analysis on each candidate bottom - plate finite element model respectively to obtain the bottom - plate deformation data and the bottom - plate residual stress distribution data of each candidate bottom - plate finite element model. Specifically, the settings of various boundary conditions can be carried out in Simufact software. For example, set parameters such as welding current and welding voltage as the heat input during the welding process, set the welding speed to control the heat distribution during the welding process, and set the fixed points and support points of the model as external constraint conditions.

[0044] S5. Combine all bottom - plate influencing factors to comprehensively score each candidate bottom - plate finite element model, select the candidate bottom - plate finite element model with the highest score as the final bottom - plate finite element model, and obtain the corresponding final welding groove angle. The bottom - plate influencing factors include bottom - plate deformation data, bottom - plate residual stress distribution data, and one or more non - bottom - plate deformation factors. The non - bottom - plate deformation factors include but are not limited to the welding cost, welding efficiency, and weld mechanical properties of the candidate bottom - plate. Specifically, it can be decided according to actual needs whether to introduce a certain non - bottom - plate deformation factor. For example, when the construction period is tight and it is necessary to rush the construction period, the non - bottom - plate deformation factor of welding efficiency can be introduced.

[0045] S6. According to the requirements of ship design specifications and on-site construction conditions, multiple candidate welding sequences are selected for the stiffener welding operation. Specifically, the multiple candidate welding sequences can be determined according to the following principles. Principle 1: Weld the welds that will not impose strong rigid constraints on other welds first. Specifically, the rigid constraints generated by each weld to be welded during welding on other welds can be analyzed, and the welds to be welded are sorted from largest to smallest according to the rigid constraints, and the welds ranked higher are welded first. Principle 2: When welding each weld, try to keep at least one end of the weld free to expand and contract. This is because the weld will expand or contract due to temperature changes during the welding process. If both ends of the weld are restricted by rigid constraints, the contraction will be hindered, resulting in greater stress and deformation. For example, when choosing the welding starting point, it can be welded from the middle of the weld to both ends, or from one end of the weld to the other end, ensuring that one end of the weld can freely contract during the welding process. Principle 3: Weld the butt welds of the entire bottom plate first, and then weld the fillet welds of the components on the plate, etc. This is because the butt welds usually have a greater impact on the rigidity of the entire structure. Welding them first can reduce the stress and deformation generated during subsequent welding; the welding sequence of the fillet welds can be selected according to Principle 1 and Principle 2.

[0046] S7. In the finite element analysis software, finite element models are established for each stiffener to be welded, and the finite element models of each stiffener are arranged above the final bottom plate finite element model in a preset manner to form a stiffener plate finite element model. The final bottom plate finite element model is already... Specifically, the MSC Apex software can be used to model and mesh the stiffeners. As Figure 3 shown, the finite element model of the stiffener preferably uses hexahedral meshes. The area of the stiffener plate finite element model near the weld can be refined, and the farther away from the weld area, the larger the mesh size, but it should be ensured that the size ratio of adjacent meshes does not exceed 2.

[0047] S8. Select a candidate welding sequence, use the welding parameters as boundary conditions, perform finite element analysis on the stiffener plate finite element model to obtain welding deformation data; repeat this step for each candidate welding sequence to obtain the stiffener deformation data and stiffener deformation trend under each candidate welding sequence respectively. Specifically, the settings of various boundary conditions can be carried out in the Simufact software.

[0048] S9. Combine all stiffener influencing factors to comprehensively score each candidate welding sequence, and select the candidate welding sequence with the highest score as the final welding sequence. The stiffener influencing factors include stiffener deformation data, stiffener deformation trend, and one or more non-stiffener deformation factors. Among them, the non-stiffener deformation factors include, but are not limited to, the welding cost, welding efficiency, and weld mechanical properties of the stiffeners. Specifically, whether to introduce a certain non-stiffener deformation factor can be determined according to actual needs. For example, when the construction budget is limited or the control is relatively strict, the non-stiffener deformation factor of welding cost can be introduced.

[0049] S10. Organize the final welding groove angle and the final welding sequence to form a stiffener welding plan.

[0050] The stiffener welding plan design method of this application selects multiple candidate welding groove angles for the sub-plates within the welding groove angle range specified by the ship design specifications, and quantitatively analyzes each candidate welding groove angle through finite element analysis. Then, the most suitable welding groove angle is selected through comprehensive scoring. This method overcomes the limitations and uncertainties of only relying on experience to select the welding groove angle in the traditional design method, can accurately evaluate the influence of different groove angles on welding deformation and residual stress distribution, and by introducing non-bottom plate deformation factors, the stiffener welding plan design method of this application can optimize the welding groove design in multiple dimensions to ensure the balance of factors such as welding quality and economic benefits. Similarly, the stiffener welding plan design method of this application can also accurately select the most suitable welding sequence for the stiffeners, thereby effectively improving the welding quality of the stiffeners and better ensuring the structural strength and navigation safety of the ship.

[0051] In one embodiment, as Figure 4 shown, when carrying out the sub-plate welding operation, a V-shaped welding groove can be adopted between adjacent sub-plates, and the welding groove gap is 1 mm. The V-shaped welding groove has the advantages of less welding material consumption, less welding deformation, high welding quality, strong adaptability, convenient operation and inspection, etc., and can effectively improve the welding efficiency and welding quality of metal materials such as aluminum alloy, and reduce the welding cost and deformation risk.

[0052] In one embodiment, in step S5, first select a candidate bottom plate finite element model, and quantitatively process each bottom plate influencing factor to obtain the corresponding influence score D ij of each bottom plate influencing factor. When quantitatively processing each bottom plate influencing factor, the actual value of the bottom plate influencing factor can be compared with its maximum allowable value and normalized to the range of 0 to 1. For example, for the bottom plate deformation data, its corresponding influence score can be obtained by quantifying it through the following formula:

[0053]

[0054] Then, the comprehensive score D of the candidate bottom plate finite element model is calculated by the following formula i , and the comprehensive scores D of all candidate bottom plate finite element models i are sorted to form a score set D:

[0055]

[0056] where the total number of candidate bottom plate finite element models is m, the total number of bottom plate influencing factors is n, and K ij is the weight coefficient corresponding to the influence score D ij . Finally, the candidate bottom plate finite element model corresponding to the highest comprehensive score D i in the score set D is selected as the final bottom plate finite element model, and the corresponding final welding groove angle is obtained. This method can comprehensively consider the influence of each bottom plate influencing factor on the welding quality, helping designers make more scientific and reasonable decisions. By optimizing the welding groove angle, welding deformation can be effectively reduced, welding quality can be improved, the construction period can be shortened, and the construction cost can be reduced. For the weight coefficient K ij , it can be specifically determined by integrating the data of historical welding projects, the opinions of experts in this field, and practical engineering experience. In addition, the actual requirements of the specific ship to be built should also be considered. For example, if the construction budget of the ship is subject to greater restrictions, the weight coefficient K ij corresponding to the welding cost can be appropriately increased to enhance its influence on the comprehensive score D i .

[0057] In one embodiment, in step S9, first, a candidate welding sequence is selected, and each stiffener influencing factor is quantified to obtain the corresponding influence score S ij of each stiffener influencing factor. When quantifying each bottom plate influencing factor, the actual value of the bottom plate influencing factor can be compared with its maximum allowable value and normalized to the range of 0 to 1. For example, for the welding cost, its corresponding influence score can be quantified by the following formula:

[0058]

[0059] Then, the comprehensive score S of the candidate welding sequence is calculated by the following formula i , and the comprehensive scores S of all candidate bottom plate finite element models i are sorted to form a score set S:

[0060]

[0061] where the total number of candidate welding sequences is a, the total number of stiffener influencing factors is b, and F ij is the influence score Sij The corresponding weight coefficient. Finally, select the highest comprehensive score S in the scoring set S i The corresponding candidate bottom plate finite element model is the final bottom plate finite element model, and the corresponding final welding groove angle is obtained. For the weight coefficient F ij , it can be determined specifically by integrating the data of historical welding projects, the opinions of experts in this field, and practical engineering experience. In addition, the actual requirements of the specific ship to be built should also be considered. For example, if the construction budget of the ship is greatly restricted, the weight coefficient F corresponding to the welding cost can be appropriately increased ij to increase its influence on the comprehensive score S i .

[0062] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A design method for rib plate welding scheme, wherein, The rib plate includes a bottom plate formed by welding multiple sub - plates and multiple stiffeners welded on the surface of the bottom plate; it is characterized in that the design method of the rib plate welding scheme includes: S1. Select multiple candidate welding groove angles for the sub - plates within the range of welding groove angles specified by the ship design specifications. S2. Select a candidate welding groove angle, establish finite element models for each sub - plate to be welded in the finite element analysis software, and arrange all the sub - plate finite element models in a preset manner to form a candidate bottom - plate finite element model; repeat this step for all candidate welding groove angles to obtain the corresponding candidate bottom - plate finite element models respectively. S3. Determine each welding parameter of the welding process according to the thermophysical parameters of the rib - plate material. S4. In the finite element analysis software, use each welding parameter as a boundary condition, and perform finite element analysis on each candidate bottom - plate finite element model respectively to obtain the bottom - plate deformation data and the bottom - plate residual stress distribution data of each candidate bottom - plate finite element model. S5. Conduct a comprehensive evaluation of each candidate bottom - plate finite element model by combining all bottom - plate influencing factors, select the candidate bottom - plate finite element model with the highest score as the final bottom - plate finite element model, and obtain the corresponding final welding groove angle; the bottom - plate influencing factors include bottom - plate deformation data, bottom - plate residual stress distribution data, and one or more non - bottom - plate - deformation factors. S6. Select multiple candidate welding sequences for the stiffener welding operation according to the requirements of the ship design specifications and the on - site construction conditions. S7. Establish finite element models for each stiffener to be welded in the finite element analysis software, and arrange each stiffener finite element model above the final bottom - plate finite element model in a preset manner to form a rib - plate finite element model. S8. Select a candidate welding sequence, use each welding parameter as a boundary condition, perform finite element analysis on the rib - plate finite element model to obtain the welding deformation data; repeat this step for each candidate welding sequence to obtain the rib - plate deformation data and rib - plate deformation trend under each candidate welding sequence respectively. S9. Conduct a comprehensive evaluation of each candidate welding sequence by combining all rib - plate influencing factors, select the candidate welding sequence with the highest score as the final welding sequence; the rib - plate influencing factors include rib - plate deformation data, rib - plate deformation trend, and one or more non - rib - plate - deformation factors. S10. Organize the final welding groove angle and the final welding sequence to form a rib - plate welding scheme.

2. The design method of the rib plate welding scheme according to claim 1, wherein In step S1, within the range of welding groove angles required by the ship design specifications, select multiple candidate welding groove angles at the same angular interval.

3. The design method of the rib plate welding scheme according to claim 1, characterized in that When carrying out the sub - plate welding operation, a V - type welding groove is used between adjacent sub - plates, and the welding groove gap is 1 mm.

4. The design method of the rib plate welding scheme according to claim 1, characterized in that, The sub - plate finite element model and / or the stiffener finite element model adopt hexahedral meshes, and mesh refinement is performed in the area near the weld.

5. The design method of the rib plate welding scheme according to claim 1, characterized in that, The thermophysical parameters in step S3 at least include the linear expansion coefficient, specific heat capacity, thermal conductivity, elastic modulus, and Poisson's ratio.

6. The method for designing the rib plate welding scheme according to claim 1, wherein, The welding parameters in step S3 at least include welding current, welding voltage, welding speed, welding thermal efficiency, welding heat source size, and various external constraint conditions during the welding process.

7. The method for designing the rib plate welding scheme according to claim 1, characterized in that The non-bottom-plate deformation factors in step S5 at least include the welding cost, welding efficiency, and weld mechanical properties of the candidate bottom-plate finite element model.

8. The design method of the rib plate welding scheme according to claim 1, characterized in that, The non-web-plate deformation factors in step S9 at least include the welding cost, welding efficiency, and weld mechanical properties of the web-plate finite element model.

9. The method for designing the rib plate welding scheme according to claim 1, wherein In step S5, first, a candidate floor finite element model is selected, and each floor influencing factor is quantified respectively to obtain the corresponding influence score D of each floor influencing factor ij , and then the comprehensive score D of the candidate floor finite element model is calculated by the following formula i , and the comprehensive scores D of all candidate floor finite element models i are sorted out to form a score set D: Among them, the total number of candidate bottom plate finite element models is m, and the total number of bottom plate influencing factors is n. K ij is the influence score D ij corresponding weight coefficient; finally, select the highest comprehensive score D in the scoring set D i The corresponding candidate bottom plate finite element model is the final bottom plate finite element model, and the corresponding final welding groove angle is obtained.

10. The rib plate welding scheme design method according to claim 1, characterized in that In step S9, first select a candidate welding sequence, and perform quantitative processing on each stiffener influencing factor respectively to obtain the corresponding influence score S of each stiffener influencing factor ij , and then calculate the comprehensive score S of the candidate welding sequence through the following formula i , and organize the comprehensive scores S of all candidate bottom plate finite element models i to form a score set S: Among them, the total number of candidate welding sequences is a, and the total number of stiffener influencing factors is b. F ij is the influence score S ij corresponding weight coefficient; finally, select the highest comprehensive score S in the scoring set S i The corresponding candidate bottom plate finite element model is the final bottom plate finite element model, and the corresponding final welding groove angle is obtained.

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