A Vertical Support Analysis Method for Independent Tank of Type A Based on GeniE

Abstract

The present invention relates to a method for analyzing the vertical support of a Type A independent liquid cargo tank based on GeniE, comprising the following steps: S1. Coarse mesh modeling, including the cabin part and the liquid tank part; S2. Vertical support modeling, including the support block part and the laminated wood part; S3. Constructing a coarse mesh analysis model; S4. Coarse mesh analysis: determining the working conditions and adding load conditions; loading the working conditions, selecting the analysis type "Tension / Compression Analysis", and analyzing to obtain the coarse mesh result R file; S5. Fine mesh modeling: taking the vertical support model for fine meshing to obtain a fine mesh analysis model; S6. Fine mesh analysis: selecting "Local Analysis" for analysis, reading the coarse mesh result R file in step S3 and loading it into the fine mesh analysis model; additionally defining a manual loading working condition, manually adding the laminated wood pressure to this manual loading working condition in the form of surface load and loading it well; after the analysis is completed, obtaining the fine mesh result R file, including the pressure load condition of the laminated wood.

Description

Technical Field

[0001] The present invention relates to the field of ship structures, and particularly to an analysis method for vertical supports of Type A independent liquid cargo tanks based on GeniE. Background Art

[0002] Liquefied natural gas and liquefied petroleum gas are flammable, explosive, and easily leakable substances. The safety, transportation, and storage of ships directly affect ship energy consumption and economic benefits. An important issue for LPG / LEG (liquefied petroleum gas / ethylene) and LNG carriers is to evaluate the strength of the connection nodes between independent liquid cargo tanks and the hull. The vertical support model of a typical Type A independent liquid cargo tank is as shown in the appendix Figure 1 The vertical support includes two support blocks, upper and lower, and laminated wood located between the two support blocks. The right side in the appendix Figure 1 shows the simplified force analysis of the vertical support. The supports are subject to vertical pressure and horizontal friction, and the laminated wood in the middle of the supports is usually simulated by spring elements or contact elements.

[0003] Since laminated wood can only bear pressure, when using spring elements for simulation, the elements that bear tension need to be deleted after each calculation, and there is an iterative process in the calculation. Most hull finite element models are plate elements (also known as shell elements) and beam elements. Contact elements need to be simulated by solid elements, and modeling the supports and laminated wood with solid elements makes the modeling too complex. Some of the above methods have cumbersome analysis processes, and some have complex modeling. Therefore, a new and more convenient modeling and analysis method is needed. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present invention is to provide an analysis method for vertical supports of Type A independent liquid cargo tanks based on GeniE, which can truly simulate the pressure load conditions of laminated wood and is simple, convenient, and fast.

[0005] To achieve the above object, the present invention provides an analysis method for vertical supports of Type A independent liquid cargo tanks based on GeniE, including the following steps:

[0006] S1. Coarse grid modeling: Establish a coarse grid simulation model in GeniE, including three adjacent cabin sections, and the middle cabin section is the target cabin to be evaluated. The coarse grid simulation model includes a ship cabin part and a liquid tank part. The ship cabin part includes the main components of the hull, the plate rib structure on the main components, and brackets that support the strength of the main components and usually have a side length greater than the rib spacing. The main components include main transverse components and main longitudinal components. And in the coarse grid simulation model, plate parts are simulated by plate elements, the plate rib structure is simulated by beam elements, and the transverse panel and vertical web of the T-section are simulated by beam elements and plate elements respectively. The size of the coarse grid in the coarse grid simulation model is the rib spacing multiplied by the rib spacing;

[0007] S2. Vertical support modeling: Establish a coarse mesh model of the vertical support in GeniE, including the support block part and the laminated wood part. The support block part is simulated with plate elements, and the laminated wood part is simulated with beam elements that can only be compressed, with the attribute set to "truss-compression only". The area of the beam element is set according to the size of the laminated wood area, and the axial stiffness is consistent with the actual stiffness of the laminated wood.

[0008] S3. Construct a coarse mesh analysis model: Arrange the coarse mesh model of the vertical support in the coarse mesh simulation model as required to form a coarse mesh analysis model.

[0009] S4. Coarse mesh analysis:

[0010] S41. Determine the working conditions according to the analysis requirements. The working conditions refer to DNV-CG-0133, and corresponding load conditions are added to the working conditions. The load conditions at least include the pressure caused by acceleration, hydrodynamic pressure, and the load generated by the deformation of the hull girder.

[0011] S41. Apply the working conditions, select the analysis type "Tension / Compression Analysis", and the GeniE program will analyze the three-cabin section of the coarse mesh simulation model and perform iterative analysis on the laminated wood model to ensure that the laminated wood model only bears compression. After the analysis, the coarse mesh result R file is obtained. The coarse mesh result R file includes the stress results and deformation results of each element and node in the coarse mesh analysis model.

[0012] S5. Fine mesh modeling: Take the vertical support model in the coarse mesh analysis model for fine meshing, and extend one strong frame forward and backward in the longitudinal direction of the ship and extend to the adjacent main longitudinal support members in the transverse direction of the ship to obtain a fine mesh analysis model, where the main longitudinal support members are longitudinally distributed strong members; the laminated wood model does not need to be set in the fine mesh model of the vertical support.

[0013] S6. Fine mesh analysis:

[0014] S61. Select "Local Analysis" for analysis. The program will read the boundary conditions and stress results of the fine mesh analysis model in the coarse mesh result R file in step S3 according to the boundary position of the fine mesh analysis model and load them into the fine mesh analysis model.

[0015] S62. Define another manual loading condition in GeniE: After creating a new condition, right-click on this condition and modify the "FEM Loadcase numbers" to be the same as that of the same condition in the coarse mesh analysis; Manually add the laminated wood pressure obtained from the coarse mesh analysis to this manual loading condition in the form of surface load; Load the manual loading condition well;

[0016] S63. GeniE analyzes the fine mesh analysis model. After the analysis is completed, a fine mesh result R file is obtained, and the fine mesh result R file includes the pressure load situation of the laminated wood.

[0017] Further, in step S1, the main longitudinal members include the outer plate, inner bottom, inner bottom side plate, and longitudinal bulkhead, and the main transverse members include the transverse bulkhead, double bottom and bilge floor, deck, and transverse T-section on the longitudinal bulkhead.

[0018] Further, in step S2, the laminated wood model is simulated by multiple beam elements arranged side by side.

[0019] Further, in step S4, DNV-CG-0133 includes working conditions LC1 to LC13. For working conditions LC1 to LC7, the analysis loads include the pressure caused by acceleration, hydrodynamic pressure, and the load generated by the deformation of the hull girder. For working conditions LC1 to LC13, the load conditions include, in addition to the pressure caused by acceleration, hydrodynamic pressure, and the load generated by the deformation of the hull girder, accidental loads.

[0020] Further, in step S4, for working conditions LC8 to LC10, select the analysis type "Tension / Compression Analysis" and at the same time select "Indep.Tank Coupling Analysis".

[0021] Further, step S6 also includes: superimposing and analyzing the fine mesh result R file and the group mesh result R file to verify the fine mesh result R file.

[0022] Further, it also includes step S7, laminated wood verification: According to the pressure load situation of the laminated wood obtained in step S6, check the laminated wood in the design to determine whether the compressive strength of the laminated wood meets the requirements.

[0023] Further, in step S7, according to the following formula Check, where F z is the pressure borne by the laminated wood, γ SF is the safety factor of the laminated wood, R c-woodis the minimum compressive strength of the laminated wood, and A is the effective area of the laminated wood.

[0024] As described above, the vertical support analysis method for the Type A independent liquid cargo tank involved in the present invention has the following beneficial effects:

[0025] By using beam elements to simulate the laminated wood, ensuring that the support only bears pressure, the pressures on each support of the Type A independent liquid cargo tank are obtained through iterative calculations. And through two analyses with coarse grids and fine grids, the pressure load situation of the laminated wood can be realistically simulated, the results are more accurate, and the strength of the laminated wood, as well as the strength of the vertical support and the nearby hull structure, can be checked accordingly. Moreover, the whole method is simple and fast, which can effectively reduce the workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the vertical support.

[0027] Figure 2 is a schematic flow diagram of the vertical support analysis method for the Type A independent liquid cargo tank of the present invention.

[0028] Figure 3 is a schematic diagram of the coarse grid model of the vertical support in the present invention.

[0029] Figure 4 is a schematic diagram of the load application in the fine grid model of the vertical support in the present invention.

[0030] DESCRIPTION OF REFERENCE NUMERALS

[0031] 1 Inner bottom of the cabin

[0032] 2 Bottom of the liquid cargo tank

[0033] 3 Vertical support

[0034] 31 Support block

[0035] 32 Laminated wood

[0036] 4 Plate element

[0037] 5 Beam element

[0038] 6 Brackets DETAILED DESCRIPTION OF THE INVENTION

[0039] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0040] It should be noted that the structures, proportions, sizes, etc. depicted in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have any substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0041] See Figures 2 to 4 , the present invention provides an analysis method for the vertical support of a Type A independent liquid cargo tank based on GeniE, including the following steps:

[0042] S1. Coarse grid modeling: Establish a coarse grid simulation model in GeniE, including three adjacent tank sections, and the middle tank section is the target tank to be evaluated. The coarse grid simulation model includes a ship's cabin part and a liquid tank part. The ship's cabin part includes the main components of the hull, the stiffener structure on the main components, and brackets that support the strength of the main components and usually have a side length greater than the rib spacing. The main components include main transverse components and main longitudinal components. In the ship's cabin structure, the main longitudinal components refer to the main structural components extending along the ship length direction, mainly including the outer plate, inner bottom, inner bottom side plate, and longitudinal bulkheads, etc. The main transverse components refer to the main structural components extending along the ship width direction, mainly including transverse bulkheads, double bottoms and bilge girders, decks, and transverse T-sections on the longitudinal bulkheads, etc. The parts in the ship's cabin structure and the liquid tank structure mainly include plate parts, stiffener structures, and T-sections, etc. In the coarse grid simulation model, the plate parts are simulated by plate elements, the stiffener structures are simulated by beam elements, and the transverse panel and vertical web of the T-section are simulated by beam elements and plate elements respectively. The size of the coarse grid in the coarse grid simulation model is the rib spacing multiplied by the rib spacing, and the rib spacing refers to the distance between two adjacent rib positions in the ship's cabin.

[0043] S2. Vertical support modeling: Establish a coarse grid model of the vertical support in GeniE, including a support block part and a laminated wood part, see Figure 3, where the support block part is simulated by plate element 4 (also known as shell element), and the laminated wood part is simulated by beam element 5 that can only be compressed, with the property set to "truss - compression only". The laminated wood part can also be called an elastic support element, and the area of beam element 5 is set according to the size of the laminated wood area, and the axial stiffness is consistent with the actual stiffness of the laminated wood. In post - processing, the axial stress of the beam element can be obtained by extracting the "G - stress" of the "truss" element through the post - processing module "Xtract". The pressure on a single laminated wood model is obtained by multiplying the "G - stress" of the truss element by the cross - sectional area of the laminated wood part. In some cases, when the ship has a lateral acceleration, the vertical stress distribution is not uniform but linear. Preferably, in this embodiment, refer to Figure 3 , the laminated wood part is simulated by multiple beam elements 5. Between the two support block simulation models, multiple beam elements are arranged side by side. The arrangement direction of beam element 5 is along the ship length direction, and they form a whole together. Its total area is set according to the size of the laminated wood area. Each beam element 5 is used to simulate the force conditions at different positions of the laminated wood, and the simulation results can be more realistic. In this embodiment, refer to Figure 3 , the support block has multiple equally - spaced gussets 6, and a beam element 5 is arranged corresponding to each gusset.

[0044] S3. Construct a coarse - grid analysis model: In the coarse - grid simulation model, arrange the vertical support coarse - grid model as required to form a coarse - grid analysis model. Specifically, refer to Figure 3 , the upper and lower support block simulation models are respectively in contact with the bottom of the liquid tank 2 and the inner bottom 1 of the ship's hold in the coarse - grid simulation model. The laminated wood part is simulated by multiple beam elements 3, whose arrangement direction is along the ship length direction and they are equally - spaced.

[0045] S4. Coarse - grid analysis, including:

[0046] S41. When analyzing the forces on a ship, it is necessary to analyze its force conditions under different operating conditions. Determine the operating conditions according to the analysis requirements. The operating conditions refer to the specification guiding document DNV-CG-0133 for DNV Type A and B independent liquid cargo tank liquefied natural gas ships. This specification makes provisions and introductions for material selection and related calculations and analyses. Corresponding load conditions are added to the operating conditions. The load conditions include at least the pressure caused by acceleration, hydrodynamic pressure, and the load generated by the deformation of the hull girder. Specifically, DNV-CG-0133 includes operating conditions LC1 to LC13. Operating conditions LC1-4 are hydrostatic conditions, and the strength of the hull, liquid tank, and vertical supports needs to be examined; operating conditions LC5-7 are navigation state conditions, and the strength of the hull, liquid tank, and vertical supports needs to be examined. Operating conditions LC8-13 are accidental load conditions, and the strength of the liquid tank and supports needs to be examined. Among them, LC8 is a full load roll of 30 degrees; LC9 is a mid-hold loading roll of 30 degrees; LC10 is a 0.5g forward acceleration caused by a collision; LC11 is a 0.25g backward acceleration caused by a collision; LC12 is a mid-hold empty flooding condition; LC13 is a mid-hold rupture condition. For operating conditions LC1 to LC7, the analysis loads include three loads: the pressure caused by acceleration, hydrodynamic pressure, and the load generated by the deformation of the hull girder. For operating conditions LC8 to LC13, in addition to the three loads of the pressure caused by acceleration, hydrodynamic pressure, and the deformation of the hull girder, the load conditions also include accidental loads, such as the load generated during full load roll and the load generated by a collision.

[0047] S42. For the loading condition, select the analysis type "Tension / Compression Analysis". The GeniE program analyzes the coarse mesh analysis model and will analyze the three tank sections of the coarse mesh simulation model. At the same time, iterative analysis is performed on the laminated wood model to ensure that the laminated wood model only bears pressure. After the analysis, the coarse mesh result R file is obtained. The coarse mesh result R file includes the stress results and deformation results of each element and node in the coarse mesh analysis model. In particular, according to the specification requirements, for operating conditions LC8 to LC10, the influence of friction needs to be considered in the coarse mesh analysis stage. For operating conditions LC8 to LC10, after loading these conditions, select "Indep.Tank CouplingAnalysis" while selecting the analysis type "Tension / Compression Analysis". The obtained coarse mesh result R file will include the friction force of the laminated wood.

[0048] S5. Fine Mesh Modeling: Take the vertical support part in the coarse mesh analysis model for fine meshing, extend one strong frame forward and backward in the ship length direction, and extend to the adjacent main longitudinal support members in the ship width direction to obtain the fine mesh analysis model. That is, in addition to the vertical support part, the fine mesh analysis model also includes some structures of the cabin and liquid tank. The main longitudinal support members are the strong members longitudinally distributed in the cabin and liquid tank. In the fine mesh analysis model, the boundaries in the front-back direction are the strong frame structures, and the boundary positions in the left-right direction are the main longitudinal support members, so as to facilitate obtaining the boundary conditions at these boundary positions read from the coarse mesh result R file. In ship structures, the webframe is also called the wide plate frame and is a structure made of T-shaped composite materials with large dimensions and flanged steel plates.

[0049] In the fine mesh model of the vertical support, there is no need to set the laminated wood model. Refer to Figure 4 , because in the coarse mesh analysis, the laminated wood pressure obtained is a force concentrated at a point. Usually, the laminated pressure is non-uniform and different at different places. Therefore, the laminated wood pressure situation obtained in the coarse mesh analysis cannot accurately reflect the laminated pressure situation. Therefore, in the fine mesh analysis, the laminated wood model is removed. During the subsequent fine mesh analysis, the load transmitted by the laminated wood can be realized by direct loading.

[0050] S6. Fine Mesh Analysis:

[0051] S61. Select "Local Analysis" for analysis. The program will, according to the boundary positions of the fine mesh analysis model, read the boundary conditions and stress results of the fine mesh analysis model in the coarse mesh result R file in step S3 and load them into the fine mesh analysis model. Among them, the boundary conditions refer to the displacements and rotations of the nodes on the model boundary in the x, y, and z directions, that is, the deformation results. Since the coarse mesh result R file in the coarse mesh analysis contains the stress situation of the part of the fine mesh analysis model, the stress situation in the fine mesh analysis model can be obtained through the boundary positions of the fine mesh analysis model.

[0052] S62. Define another manual loading condition in GeniE: After creating a new condition, right-click on this condition and modify the "FEM Loadcase numbers" to be the same as that of the same condition in the coarse mesh analysis; manually add the laminated wood pressure obtained in the coarse mesh analysis to this manual loading condition in the form of surface load. Refer to Figure 4, specifically, the laminated wood pressure obtained from the coarse mesh analysis is in the form of a point load. Divide it by the area of the laminated wood to obtain the surface load. Additionally, in some cases where friction needs to be considered, the laminated wood pressure friction also needs to be added to this manual loading condition; load the manual loading condition well. The purpose of this step is to directly load the laminated wood pressure obtained from the coarse mesh analysis in the form of a surface load, rather than simulating it in the form of beam elements.

[0053] S63. Analyze the fine mesh analysis model using GeniE. After the analysis is completed, obtain the fine mesh result R file. The fine mesh result R file includes the pressure load condition of the laminated wood, and moreover, this pressure load condition is a surface load rather than a point load, thus more accurately reflecting the pressure load condition of the laminated wood.

[0054] Preferably, in this step, the fine mesh result R file is also superposed and analyzed with the group mesh result R file to verify the fine mesh result R file to ensure whether the fine mesh result R file meets the requirements.

[0055] Preferably, it further includes step S7, laminated wood verification: According to the pressure load condition of the laminated wood obtained in step S6, check the laminated wood in the design to determine whether the compressive strength of the laminated wood meets the requirements. Specifically, according to the following formula Check, where Fz is the pressure borne by the laminated wood, γSF is the safety factor of the laminated wood, Rc-wood is the minimum compressive strength of the laminated wood, and A is the effective area of the laminated wood, which is determined according to factors such as the structure of the support block and the contact area between the laminated wood and the support block. In addition, through the pressure load condition of the laminated wood, it can also be used for the strength of the support block and the hull structure.

[0056] The vertical support analysis method for the A-type independent liquid cargo tank of the present invention uses beam elements to simulate the laminated wood to ensure that the support only bears pressure. The pressures of each support of the A-type independent liquid cargo tank are obtained through iterative calculation. And through two analyses of the coarse mesh and the fine mesh, it can truly simulate the pressure load condition of the laminated wood, and the result is more accurate. Based on this, the strength of the laminated wood, as well as the strength of the vertical support and the nearby hull structure, can be checked, and the whole method is simple and fast, which can effectively reduce the workload.

[0057] In summary, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0058] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A vertical support analysis method for Type A independent liquid cargo tanks based on GeniE, characterized in that: It includes the following steps: S1. Coarse mesh modeling: Establish a coarse mesh simulation model in GeniE, which includes three adjacent cabin sections, and the middle cabin section is the target cabin to be evaluated. The coarse mesh simulation model includes a ship's cabin part and a liquid tank part. The ship's cabin part includes the main components of the hull, the stiffener structure on the main components, and brackets that support the strength of the main components and have a side length greater than the rib pitch. The main components include main transverse components and main longitudinal components. And in the coarse mesh simulation model, plate parts are simulated with plate elements, the stiffener structure is simulated with beam elements, and the transverse panel and vertical web of the T-section are simulated with beam elements and plate elements respectively; The size of the coarse mesh in the coarse mesh simulation model is the rib pitch multiplied by the rib pitch; S2. Vertical support modeling: Establish a coarse mesh model of the vertical support in GeniE, which includes a support block part and a laminated wood part. Among them, the support block part is simulated with plate elements, and the laminated wood part is simulated with beam elements that can only be compressed, and the attribute is set to "truss-compression only". And the area of the beam element is set according to the size of the laminated wood area, and the axial stiffness is consistent with the actual stiffness of the laminated wood; S3. Construct a coarse mesh analysis model: Arrange the coarse mesh model of the vertical support in the coarse mesh simulation model as required to form a coarse mesh analysis model; S4. Coarse mesh analysis: S41. Determine the working conditions according to the analysis requirements. The working conditions refer to DNV-CG-0133, and corresponding load conditions are added to the working conditions. The load conditions at least include the pressure caused by acceleration, hydrodynamic pressure, and the load generated by the deformation of the hull girder; S41. Load the working conditions, select the analysis type "Tension / Compression Analysis", and the GeniE program analyzes the coarse mesh analysis model, analyzes the three cabin sections of the coarse mesh simulation model, and iteratively analyzes the laminated wood model at the same time to ensure that the laminated wood model only bears pressure. After the analysis, a coarse mesh result R file is obtained. The coarse mesh result R file includes the stress results and deformation results of each unit and node in the coarse mesh analysis model; S5. Fine mesh modeling: Take the vertical support model in the coarse mesh analysis model for fine meshing, and extend one strong rib in front and behind in the ship length direction, and extend to the adjacent main longitudinal support members in the ship width direction to obtain a fine mesh analysis model, where the main longitudinal support members are strong members distributed longitudinally; The laminated wood model does not need to be set in the fine mesh model of the vertical support; S6. Fine mesh analysis: S61. Select "LocalAnalysis" for analysis. The program will read the boundary conditions and stress results of the fine mesh analysis model in the coarse mesh result R file in step S4 according to the boundary position of the fine mesh analysis model and load them into the fine mesh analysis model; S62. Define another manual loading condition in GeniE: After creating a new condition, right-click on this condition and modify "FEM Loadcase numbers" to be the same as that of the same condition in the coarse mesh analysis; manually add the laminated wood pressure obtained from the coarse mesh analysis to this manual loading condition in the form of surface load. Load the manual loading condition. S63. GeniE analyzes the fine mesh analysis model. After the analysis is completed, a fine mesh result R file is obtained, and the fine mesh result R file includes the pressure load condition of the laminated wood.

2. The vertical support analysis method of the Type A independent liquid cargo tank according to claim 1, wherein: In step S1, the main longitudinal members include the outer plate, inner bottom, inner bottom side plate, and longitudinal bulkhead, and the main transverse members include the transverse bulkhead, double bottom and bilge floor, deck, and transverse T-sections on the longitudinal bulkhead.

3. The vertical support analysis method for the Type A independent liquid cargo tank according to claim 1, characterized in that: In step S2, the laminated wood model is simulated by multiple beam elements arranged side by side.

4. The vertical support analysis method for the Type A independent liquid cargo tank according to claim 1, characterized in that: In step S4, DNV-CG-0133 includes conditions LC1 to LC13. For conditions LC1 to LC7, the analysis loads include the pressure caused by acceleration, hydrodynamic pressure, and the loads generated by the deformation of the hull girder. For conditions LC1 to LC13, the load conditions include, in addition to the pressure caused by acceleration, hydrodynamic pressure, and the loads generated by the deformation of the hull girder, also accidental loads.

5. The vertical support analysis method for the Type A independent liquid cargo tank according to claim 4, wherein: In step S4, for conditions LC8 to LC10, while selecting the analysis type "Tension / Compression Analysis", select "Indep. Tank Coupling Analysis".

6. The vertical support analysis method for the Type A independent liquid cargo tank according to claim 1, wherein: Step S6 also includes: superimposing and analyzing the fine mesh result R file and the group mesh result R file to verify the fine mesh result R file.

7. The vertical support analysis method for the type A independent liquid cargo tank according to claim 1, characterized in that: It also includes step S7, laminated wood verification: According to the pressure load condition of the laminated wood obtained in step S6, check the laminated wood in the design to determine whether the compressive strength of the laminated wood meets the requirements.

8. The vertical support analysis method for the Type A independent liquid cargo tank according to claim 7, characterized in that: In the step S7, according to the following formula for verification, where F z is the pressure borne by the laminated wood, γ SF is the safety factor of the laminated wood, R c-wood is the minimum compressive strength of the laminated wood, and A is the effective area of the laminated wood.

Images