A numerical simulation method and system for non-standard tank construction process

Abstract

This invention relates to the field of engineering numerical simulation technology, and in particular to a numerical simulation method and system for the construction process of non-standard storage tanks. The invention creates an analysis layer based on the construction stage, determines the construction process density guiding field and geometric density guiding field based on the analysis layer, and generates an adaptive mesh density field, followed by finite element mesh generation. When performing finite element mesh generation on multiple models, engineers only need to define the construction stage and analysis objective, and the mesh generation process can be completed automatically, significantly shortening the preprocessing cycle and reducing the risk of human error. It is particularly suitable for handling complex and variable construction simulations of non-standard storage tanks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering numerical simulation, in particular to a non-standard tank construction process numerical simulation method and system. BACKGROUND

[0002] Non-standard tank generally refers to the tank whose volume, diameter, height and structure form do not conform to the national or industry standard atlas. Due to the uniqueness of its structure, it is easy to produce large deformation and internal stress during construction. If not properly controlled, it may lead to serious problems such as geometric precision out-of-tolerance, weld cracking, and even structural instability, affecting the performance and safety of the tank.

[0003] In the numerical simulation of non-standard tank construction process, the quality of finite element mesh directly determines the accuracy, convergence and computational efficiency of the calculation results. The traditional method usually determines a global uniform mesh size standard at the beginning of modeling, or only locally encrypts a few obvious areas according to experience. This method cannot meet the dynamic change requirements of multi-stage and multi-physical field in the construction process. Although engineers use heterogeneous elements such as shell elements and solid elements on different components, this selection is usually static and isolated, for example, the entire wall plate is divided into shell elements, while the thick bottom plate is divided into solid elements. However, in the construction process, some areas that were originally considered thin-walled may need to use solid elements due to stress concentration or the need for detailed elastic-plastic analysis. The traditional simple division cannot achieve this dynamic heterogeneous conversion based on analysis requirements. The special-shaped structure and complex welds of non-standard tanks are high-risk areas of stress concentration. Traditional adaptive meshing is prone to produce abnormal elements when dealing with these geometric discontinuous features, resulting in decreased calculation accuracy or even solving failure, which requires a lot of manual intervention for local repair, and is low in efficiency. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a non-standard tank construction process numerical simulation method and system to solve the problems in the prior art.

[0005] The present application provides a non-standard tank construction process numerical simulation method, which comprises the following steps:

[0006] S1: Collecting non-standard tank construction information data;

[0007] S2: Structuring the non-standard tank construction information data to obtain processed non-standard tank construction information data;

[0008] S3: Combining the processed non-standard tank construction information data to construct a three-dimensional geometric model and a construction environment model of the non-standard tank;

[0009] S4: Perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank;

[0010] S4 specifically comprises: S4.1: Determining the analysis layer of the finite element mesh in the three-dimensional geometric model and construction environment model of the non-standard storage tank according to the construction stage and analysis objectives; S4.2: Generating an adaptive mesh density field based on the analysis layer; specifically: determining the construction process density guiding field based on the analysis layer; determining the geometric density guiding field of the three-dimensional geometric model and construction environment model of the non-standard storage tank; fusing and smoothing the construction process density guiding field and the geometric density guiding field to obtain an adaptive mesh density field; S4.3: Performing finite element mesh generation based on the adaptive mesh density field;

[0011] S5: Perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

[0012] Preferably, S4.1 specifically involves: creating an analysis layer based on the construction stage, the analysis layer including a prefabrication stage analysis layer, a component assembly stage analysis layer, a welding construction stage analysis layer, and an overall forming and hoisting stage analysis layer; determining the corresponding analysis layer target and dominant physical field based on the analysis layer; and setting the priority and network resource allocation weight of the analysis layer.

[0013] Preferably, determining the key process parameters of the analysis layer based on the analysis layer objective is specifically as follows:

[0014] For the welding construction stage analysis layer, the key process parameters are welding current, voltage, welding speed, arc efficiency, and preheating temperature. The construction process load sensitivity value is calculated based on these key process parameters. For the prefabrication stage analysis layer and the component assembly stage analysis layer, the construction process load sensitivity value is calculated by inputting the corresponding process parameters of this layer into the structural mechanics model and solving analytically. For the welding construction stage analysis layer, the construction process load sensitivity value is determined by inputting the corresponding process parameters of this layer into a double ellipsoidal model and solving analytically. For the integral forming and hoisting stage analysis layer, the construction process load sensitivity value is determined by inputting the corresponding process parameters of this layer into a simply supported beam model and solving analytically. Finally, the construction process load sensitivity values ​​are used to generate a continuous process density guiding field through linear interpolation.

[0015] Preferably, the geometric density guiding field for determining the three-dimensional geometric model and construction environment model of the non-standard storage tank is specifically as follows:

[0016] The three-dimensional geometric model and construction environment model of the non-standard storage tank are scanned to identify high curvature regions, abrupt thickness change regions, and complex topological regions in the model; sensitivity values ​​are assigned to the regions to obtain sensitivity values, and spatial interpolation is performed on the sensitivity values ​​to form a continuous geometric density guiding field.

[0017] Preferably, S3 specifically comprises:

[0018] S3.1: Construct a three-dimensional geometric model of the non-standard storage tank based on its basic design data;

[0019] S3.2: Simplify and repair the three-dimensional geometric model of the non-standard storage tank to obtain the processed three-dimensional geometric model;

[0020] S3.3: Define the geometric state of the construction stage for the processed three-dimensional geometric model, and construct three-dimensional geometric models for different construction stages;

[0021] S3.4: Construct a construction environment model;

[0022] S3.5: Integrate the three-dimensional geometric models of the different construction stages and the construction environment model to obtain the three-dimensional geometric model and construction environment model of the non-standard storage tank.

[0023] Preferably, the basic design data includes the general layout, component drawings, and detailed node drawings of the non-standard storage tank. The general layout is used to describe the overall outline, main dimensions, relative positions of each component, and connection methods of the non-standard storage tank. The component drawings include the bottom plate layout, wall panel layout, unfolded head drawing, internal component drawing, and external accessory drawing. The bottom plate layout and wall panel layout are used to describe the dimensions, curvature, wall thickness, numbering, and bevel form of each wall panel. The internal component drawings include the reinforcing ring drawing, partition drawing, and internal floating roof track drawing. The external accessory drawings include the ladder drawing, platform drawing, pipe drawing, manhole drawing, level gauge interface drawing, and reinforcing rib drawing. The detailed node drawings are used to describe the detailed structure of complex connection parts, including the welding joints between the pipe and the shell, the connection joints between the support and the shell, and the butt joints of plates of different thicknesses.

[0024] Preferably, the simplification of the three-dimensional geometric model of the non-standard storage tank specifically involves deleting details that have minimal impact on the overall strength and stiffness of the three-dimensional geometric model; the geometric repair specifically involves using the repair tools built into the three-dimensional CAD software to detect and repair the three-dimensional geometric model of the non-standard storage tank.

[0025] Preferably, the construction information data of the non-standard storage tank includes basic design data, construction process data, key construction procedures and potential risk factors data, and material data.

[0026] Preferably, the basic design data includes the dimensions and bill of materials of the general layout, component drawings, and detailed node drawings of the non-standard storage tank;

[0027] The construction process data includes the specific construction process of the non-standard storage tank, including plate procurement and inspection, plate transportation and storage, prefabrication, component assembly, segmented hoisting and assembly, circumferential / longitudinal seam welding, non-destructive testing, overall hoisting, accessory installation, hydrostatic testing, corrosion protection and insulation, and final acceptance.

[0028] The key construction procedures and potential risk factors specifically include large-component hoisting, thick plate welding, complex node assembly, heat treatment, excessive welding heat input, improper selection of hoisting points, and instability of temporary supports.

[0029] According to another aspect of the present invention, a numerical simulation system for the construction process of non-standard storage tanks is provided. The system employs the aforementioned numerical simulation method for the construction process of non-standard storage tanks, and the system includes:

[0030] The data acquisition module is used to collect construction information data for non-standard storage tanks;

[0031] The preprocessing module is used to perform data structuring processing on the non-standard storage tank construction information data to obtain the processed non-standard storage tank construction information data;

[0032] The model building module is used to construct a three-dimensional geometric model and a construction environment model of the non-standard storage tank by combining the processed construction information data of the non-standard storage tank.

[0033] The mesh generation module is used to perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank;

[0034] The numerical simulation module is used to perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

[0035] The embodiments of the present invention have the following technical effects:

[0036] This invention creates an analysis layer based on the construction stage, determines the construction process density guiding field and geometric density guiding field based on the analysis layer, and generates an adaptive mesh density field, and then performs finite element mesh generation; when performing finite element mesh generation for multiple models, engineers only need to define the construction stage and analysis objective, and the mesh generation process can be completed automatically, which greatly shortens the preprocessing cycle and reduces the risk of human error, and is especially suitable for handling complex and variable non-standard storage tank construction simulation.

[0037] Meanwhile, the adaptive mesh density field provided by this invention can accurately allocate valuable mesh resources to where they are most needed, avoiding wasting computational power in irrelevant areas. Compared with traditional adaptive mesh density fields, it can reduce the number of meshes by 30%-60% while maintaining the same computational accuracy, and significantly improve the solution accuracy in critical areas. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a flowchart of a numerical simulation method for the construction process of a non-standard storage tank provided in an embodiment of the present invention;

[0040] Figure 2 This is a flowchart illustrating the construction of a three-dimensional geometric model and a construction environment model of a non-standard storage tank by combining processed construction information data, as provided in this embodiment of the invention.

[0041] Figure 3 This is a flowchart of finite element mesh generation for the three-dimensional geometric model and construction environment model of the non-standard storage tank, provided in an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] Example 1, Figure 1 A flowchart of a numerical simulation method for the construction process of non-standard storage tanks is shown, such as... Figure 1 As shown, a numerical simulation method for the construction process of non-standard storage tanks includes the following steps:

[0044] S1: Collect construction information data for non-standard storage tanks;

[0045] The construction information data for the non-standard storage tanks includes basic design data, construction process data, and data on key construction procedures and potential risk factors.

[0046] The basic design data includes the general layout, component drawings, detailed node drawings, dimensions, and bill of materials of the non-standard storage tank.

[0047] The construction process data includes the specific construction process of the non-standard storage tank, including plate procurement and inspection, plate transportation and storage, prefabrication, component assembly, segmented hoisting and assembly, circumferential / longitudinal seam welding, non-destructive testing, overall hoisting, accessory installation, hydrostatic testing, corrosion protection and insulation, and final acceptance.

[0048] The key construction procedures and potential risk factors data refer to the construction procedures that have a significant impact on the forming quality and structural safety of the non-standard storage tank, as well as potential risk factors that may lead to excessive deformation, stress concentration, or safety accidents. Specifically, these include large component hoisting, thick plate welding, complex node assembly, heat treatment, excessive welding heat input, improper selection of hoisting points, and instability of temporary supports.

[0049] S2: Perform data structuring on the non-standard storage tank construction information data to obtain the processed non-standard storage tank construction information data;

[0050] To facilitate subsequent access and management, in this step, the non-standard storage tank construction information data collected in S2 is standardized to form structured non-standard storage tank construction information data.

[0051] S3: Construct a three-dimensional geometric model and a construction environment model of the non-standard storage tank by combining the processed construction information data of the non-standard storage tank;

[0052] In this step, by constructing a three-dimensional geometric model and a construction environment model of the non-standard storage tank, a three-dimensional integrated digital model can be accurately reflected, showing the geometric shape of the non-standard storage tank at each key construction stage and its interaction with the construction environment. This provides a precise geometric basis for subsequent finite element mesh generation and numerical analysis.

[0053] Specifically, such as Figure 2 As shown, S3 specifically includes:

[0054] S3.1: Construct a three-dimensional geometric model of the non-standard storage tank based on the processed construction information data of the non-standard storage tank;

[0055] A three-dimensional geometric model of the non-standard storage tank is constructed using the basic design data from the processed construction information data. This basic design data includes the tank's general layout, component drawings, and detailed node drawings. The general layout describes the tank's overall outline, main dimensions, relative positions of components, and connection methods. The component drawings include a base plate layout, wall panel layout, unfolded head drawings, internal component drawings, and external accessory drawings. The base plate layout and wall panel layout drawings describe the dimensions, curvature, wall thickness, numbering, and bevel type of each wall panel. The internal component drawings include reinforcing ring drawings, partition drawings, and internal floating roof track drawings. The external accessory drawings include ladder drawings, platform drawings, nozzle drawings, manhole drawings, level gauge interface drawings, and reinforcing rib drawings. The detailed node drawings describe the detailed construction of complex connection parts, including welded joints between nozzles and the shell, connection joints between supports and the shell, and butt joints between plates of different thicknesses.

[0056] In this step, a three-dimensional geometric model of the non-standard storage tank is constructed using 3D CAD software. A component-based modeling approach is adopted. For cylindrical wall panels, if they are standard arc shapes, they are generated by stretching or rotating. If they are multiple wall panels with different curvatures, the surface of each wall panel needs to be accurately drawn according to the panel layout drawing. For wall panels with variable wall thickness, this is achieved through shell extraction commands or by creating multiple solid combinations. For the end caps, if they are standard end caps with known equations, the built-in end cap model in the software is directly called and the parameters are modified. If they are irregular end caps, precise surface modeling is required based on the curve equations provided in the design.

[0057] Boolean operations in 3D CAD software are used to handle the connection and cutting relationships between the components of the non-standard storage tank, such as the openings and connections between the pipes and the shell, and the welding bevels between the bottom plate and the wall plate.

[0058] S3.2: Simplify and repair the three-dimensional geometric model of the non-standard storage tank to obtain the processed three-dimensional geometric model;

[0059] In this step, while ensuring computational accuracy, details with minimal impact on the structural mechanical performance of the non-standard storage tank's 3D geometric model are removed. This simplifies the model complexity, reduces unnecessary computational resource consumption, and improves the quality and efficiency of mesh generation. Simultaneously, geometric defects that may arise during modeling are corrected. Specifically, the simplification of the non-standard storage tank's 3D geometric model involves deleting details with minimal impact on the overall strength and stiffness of the 3D geometric model, such as: non-load-bearing small chamfers, small fillets, surface decorative patterns, markings, temporary process holes, and process attachments with extremely small diameters welded to the main structure. For densely and regularly distributed small features, if their overall effect is much greater than their individual effect, equivalent homogenized material properties or simplified beam / plate element arrays are considered for replacement. Multiple adjacent parts that have no independent impact on the analysis are merged into a single integral part for modeling.

[0060] The geometric repair specifically involves using the repair tools built into the 3D CAD software to detect and repair the 3D geometric model of the non-standard storage tank, including: stitching gaps, deleting duplicate faces, filling holes, unifying face normals, removing tiny edges / faces, etc., to ensure that the model becomes a watertight and effective geometric entity.

[0061] S3.3: Define the geometric state of the construction stage for the processed three-dimensional geometric model, and construct three-dimensional geometric models for different construction stages;

[0062] The construction of the non-standard storage tank is a dynamic process, and the geometry of the tank changes as the construction process progresses. This step defines the three-dimensional geometric state of the tank at the completion of each key construction process or at a specific moment, in order to perform independent or continuous numerical simulations for each construction state.

[0063] The construction phase includes the prefabrication phase, the component assembly phase, the welding phase, and the overall forming and hoisting phase.

[0064] In this step, triggered by the processed 3D geometric model, geometric models for different construction stages are constructed by hiding uninstalled components, displaying installed components, and moving components to designated positions, according to the construction stage.

[0065] S3.4: Construct a construction environment model;

[0066] The non-standard storage tank, its construction environment, and various tooling, equipment, and loads used in construction are integrated into a model to construct a complete tank-environment-tooling-load system model, so as to accurately simulate the interaction between them.

[0067] Specifically, the construction environment model includes a support system model and a hoisting system model. The support system includes temporary supports, permanent supports, jigs, clamps, ground anchors, etc., and a geometric model of the support system is established based on the actual structure and materials of the supports. For simple supports, they are created directly using basic CAD voxels; for complex truss-type gantry frames, they are constructed according to the design drawings. The contact method and connection relationship between the support system and the non-standard storage tank are defined. The hoisting system includes cranes, slings, balance beams, special lifting lugs, etc., and is modeled using the 3D CAD software.

[0068] When establishing the construction environment model, construction loads and environmental conditions need to be considered. The construction loads include gravity loads, hoisting loads, wind loads, temperature loads, and operational loads. The gravity load includes the structural weight of the non-standard storage tank itself, the weight of accessories, the weight of installed components, the weight of construction materials, and the weight of hoisting slings. It is automatically calculated on the construction environment model by applying gravitational acceleration. The hoisting load is the tension of the slings on the lifting lugs and is a key load for hoisting analysis; its value is estimated using crane performance tables. The wind load includes natural or mechanical winds that may be encountered during construction. Based on local meteorological data and specifications, wind pressure at different heights is calculated and converted into a pressure load acting on the windward side of the non-standard storage tank. The temperature load is a load composed of ambient temperature and welding heat load. The operational load includes the weight of construction personnel and small construction equipment, and the dynamic forces generated by their operation.

[0069] S3.5: Integrate the three-dimensional geometric models of the different construction stages and the construction environment model to obtain the three-dimensional geometric model and construction environment model of the non-standard storage tank.

[0070] The three-dimensional geometric models of different construction stages and the construction environment model are combined into a complete and conflict-free analysis model according to spatial relationships. During the model integration process, it is necessary to ensure that all models are in the same coordinate system, and to position and constrain each component according to the actual installation and construction conditions.

[0071] S4: Perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank;

[0072] In numerical simulations of non-standard storage tank construction, the quality of the finite element mesh directly determines the accuracy, convergence, and computational efficiency of the results. Traditional methods typically determine a globally uniform mesh size standard at the initial modeling stage, or only refine the mesh locally in a few obvious areas based on experience. This approach cannot cope with the dynamic changes in the multi-stage and multi-physics field of the construction process. Although engineers may use heterogeneous elements such as shell elements and solid elements on different components, this choice is often static and isolated. For example, the entire wall panel may be divided into shell elements, while the thick bottom plate may be divided into solid elements. However, during construction, some areas that were originally considered thin-walled may require solid elements due to stress concentration or the need for detailed elastoplastic analysis. Traditional simple meshing cannot achieve this dynamic heterogeneous transformation based on analysis requirements. The irregular structure and complex welds of non-standard storage tanks are high-incidence areas of stress concentration. Traditional adaptive meshing is prone to generating malformed elements when dealing with these geometric discontinuities, leading to decreased computational accuracy or even solution failure. This requires a lot of manual intervention for local repair, which is inefficient.

[0073] This embodiment proposes an adaptive hierarchical heterogeneous finite element mesh generation method for the construction process. It automatically adjusts the mesh density of key regions based on the simulated construction stage and analysis objectives. Simultaneously, within a single component or region, it generates a mesh density field on demand based on predictions of local curvature, thickness, and stress gradients. Furthermore, it introduces a mesh generation algorithm based on geometric streamlines and feature-driven principles to ensure that the mesh in irregular structures and complex weld regions is regular and orderly, reducing the generation of deformable elements from the outset. Through these improvements, while ensuring accurate capture of key physical phenomena, the overall mesh size is significantly reduced, and the computation cycle is shortened.

[0074] Specifically, such as Figure 3 As shown, S4 specifically includes:

[0075] S4.1: Determine the analysis layers of the finite element mesh in the three-dimensional geometric model and construction environment model of the non-standard storage tank according to the construction stage and analysis objectives;

[0076] In this step, based on the dynamic nature of the construction process of the non-standard storage tank and the diversity of analysis objectives, the three-dimensional geometric model and construction environment model of the non-standard storage tank are layered through logical layering. Each analysis layer focuses on a specific construction stage and a core analysis objective, thereby configuring the optimal mesh resources for the most decisive physical phenomena of that stage.

[0077] In this step, the construction phases include the prefabrication phase, component assembly phase, welding phase, and overall forming and hoisting phase. The analysis objective refers to the scientific or engineering problem that is of most concern and needs to be clarified in the finite element mesh generation at a specific construction phase. For example, in the welding phase, the analysis objective is welding residual stress and deformation; in the overall forming and hoisting phase, the analysis objective is structural stiffness and local strength of the lifting lugs; and in the prefabrication and component assembly phases, the analysis objective is component strength and stability.

[0078] Specifically, S4.1 involves creating an analysis layer based on the construction stage, which includes an analysis layer for the prefabrication stage, an analysis layer for the component assembly stage, an analysis layer for the welding construction stage, and an analysis layer for the overall forming and hoisting stage.

[0079] The corresponding analysis layer target and dominant physical field are determined based on the analysis layer;

[0080] The analysis objectives of the welding construction stage analysis layer are welding residual stress and deformation, and the dominant physical field is a thermo-structural strong coupling physical field; the analysis objectives of the overall forming and hoisting stage analysis layer are structural stiffness and local strength of the lifting lugs, and the dominant physical field is a static / dynamic structural mechanics physical field; the analysis objectives of the prefabrication stage analysis layer and the component assembly stage analysis layer are component strength and stability, and the dominant physical field is a linear elastic / elastoplastic structural mechanics physical field.

[0081] Set the priority of the analysis layer and the weight of network resource allocation;

[0082] During the construction of non-standard storage tanks, there are multiple analysis layers. Due to limited computing resources, it is necessary to prioritize the importance of different analysis layers so that resources can be used for selection or emphasis when they are scarce. In this step, the analysis layers are divided into high-priority layers, medium-priority layers, and low-priority layers. The network resource allocation weight of the high-priority layer is 0.6, the network resource allocation weight of the medium-priority layer is 0.3, and the network resource allocation weight of the low-priority layer is 0.1.

[0083] Therefore, each analysis layer file contains the three-dimensional geometric model and construction environment model of the associated non-standard storage tank, the analysis objective and dominant physical field of this stage, and the priority and weight of this layer in the finite element mesh generation process.

[0084] S4.2: Generate an adaptive grid density field based on the analysis layer;

[0085] The construction process density guiding field is determined based on the analysis layer;

[0086] The key process parameters of the analysis layer are determined based on the analysis layer objectives corresponding to the analysis layer. For example, for the welding construction stage analysis layer, the key process parameters are welding current, voltage, welding speed, arc efficiency, and preheating temperature. The construction process load sensitivity value is calculated based on the key process parameters. For the prefabrication stage analysis layer and the component assembly stage analysis layer, the construction process load sensitivity value is calculated by inputting the corresponding process parameters of the layer into the structural mechanics model and solving the analytical solution. For the welding construction stage analysis layer, the construction process load sensitivity value is determined by inputting the corresponding process parameters of the layer into the double ellipsoid model and solving the Rosenthal analytical solution. For the integral forming and hoisting stage analysis layer, the construction process load sensitivity value is determined by inputting the corresponding process parameters of the layer into the simply supported beam model and solving the analytical solution. Finally, the construction process load sensitivity value is used to generate a continuous process density guiding field through linear interpolation. This field clearly depicts the hot spots and high stress paths inside the structure under the current construction operation.

[0087] Determine the geometric density guiding field of the three-dimensional geometric model and the construction environment model of the non-standard storage tank;

[0088] A rapid scan is performed on the three-dimensional geometric model and construction environment model of the non-standard storage tank to identify high curvature regions, abrupt thickness change regions, and complex topological regions in the model. Sensitivity values ​​are assigned to these regions, where the sensitivity of the high curvature region is a linear function of curvature, the sensitivity of the abrupt thickness change region is a linear function of thickness, and the sensitivity of the complex topological region is a linear function of complexity. Spatial interpolation is then performed on the sensitivity values ​​to form a continuous geometric density guiding field.

[0089] An adaptive grid density field is obtained by fusing and smoothing the construction process density guiding field and the geometric density guiding field.

[0090] Specifically, the construction process density guiding field and the geometric density guiding field are fused using a weighted fusion method, and the fused mixed field is smoothed using a nonlinear smoothing method to obtain an adaptive grid density field.

[0091] S4.3: Perform finite element mesh generation based on the adaptive mesh density field;

[0092] After generating the adaptive mesh density field, the corresponding analysis layer is activated according to the current construction stage to be simulated, and the mesh generator is guided by the adaptive mesh density field to perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank.

[0093] In this step, this embodiment creates an analysis layer based on the construction stage, determines the construction process density guiding field and geometric density guiding field based on the analysis layer, and generates an adaptive mesh density field before performing finite element mesh generation. When performing finite element mesh generation for multiple models, engineers only need to define the construction stage and analysis objective, and the mesh generation process can be completed automatically, significantly shortening the preprocessing cycle and reducing the risk of human error. This is particularly suitable for handling complex and variable non-standard storage tank construction simulations. Simultaneously, the adaptive mesh density field provided in this embodiment can accurately allocate valuable mesh resources to the most needed areas, avoiding wasting computational power in irrelevant regions. Compared to traditional adaptive mesh density fields, this can reduce the number of meshes by 30%-60% while maintaining the same computational accuracy, and significantly improve the solution accuracy in critical areas.

[0094] S5: Perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

[0095] Example 2: This invention also provides a numerical simulation system for the construction process of non-standard storage tanks. The system employs a numerical simulation method for the construction process of non-standard storage tanks as described in Example 1. The system includes:

[0096] The data acquisition module is used to collect construction information data for non-standard storage tanks;

[0097] The preprocessing module is used to perform data structuring processing on the non-standard storage tank construction information data to obtain the processed non-standard storage tank construction information data;

[0098] The model building module is used to construct a three-dimensional geometric model and a construction environment model of the non-standard storage tank by combining the processed construction information data of the non-standard storage tank.

[0099] The mesh generation module is used to perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank;

[0100] The numerical simulation module is used to perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

[0101] Example 3: The present invention also provides an electronic device, including one or more processors and a memory.

[0102] A processor can be a central processing unit (CPU) or other form of processing unit with data processing and / or instruction execution capabilities, and can control other components in an electronic device to perform desired functions.

[0103] The memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and a processor may execute the program instructions to implement a numerical simulation method for the construction process of a non-standard storage tank as described above in any embodiment of this application, and / or other desired functions. Various contents such as initial extrinsic parameters and thresholds may also be stored in the computer-readable storage medium.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A numerical simulation method for the construction process of non-standard storage tanks, characterized in that, The method includes the following steps: S1: Collect construction information data for non-standard storage tanks; S2: Perform data structuring on the non-standard storage tank construction information data to obtain the processed non-standard storage tank construction information data; S3: Construct a three-dimensional geometric model and a construction environment model of the non-standard storage tank by combining the processed construction information data of the non-standard storage tank; S4: Perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank; S4 specifically comprises: S4.1: Determining the analysis layer of the finite element mesh in the three-dimensional geometric model and construction environment model of the non-standard storage tank according to the construction stage and analysis objectives; S4.2: Generating an adaptive mesh density field based on the analysis layer; specifically: determining the construction process density guiding field based on the analysis layer; determining the geometric density guiding field of the three-dimensional geometric model and construction environment model of the non-standard storage tank; fusing and smoothing the construction process density guiding field and the geometric density guiding field to obtain an adaptive mesh density field; S4.3: Performing finite element mesh generation based on the adaptive mesh density field; S5: Perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

2. The numerical simulation method for the construction process of a non-standard storage tank according to claim 1, characterized in that, S4.1 specifically involves: creating an analysis layer based on the construction stage, the analysis layer including a prefabrication stage analysis layer, a component assembly stage analysis layer, a welding construction stage analysis layer, and an overall forming and hoisting stage analysis layer; determining the corresponding analysis layer objectives and dominant physical fields based on the analysis layers; and setting the priority and network resource allocation weights of the analysis layers.

3. The numerical simulation method for the construction process of a non-standard storage tank according to claim 2, characterized in that, The key process parameters of the analysis layer are determined based on the analysis layer objective as follows: For the welding construction stage analysis layer, the key process parameters are welding current, voltage, welding speed, arc efficiency, and preheating temperature; the construction process load sensitivity value is calculated based on the key process parameters; for the prefabrication stage analysis layer and the component assembly stage analysis layer, the construction process load sensitivity value is calculated by inputting the corresponding process parameters of the layer into the structural mechanics model and solving the analytical solution. For the welding construction stage analysis layer, the construction process load sensitivity value is determined by inputting the corresponding process parameters of the layer into the double ellipsoid model and solving analytically. For the overall forming and hoisting stage analysis layer, the construction process load sensitivity value is determined by inputting the corresponding process parameters of the layer into the simply supported beam model and solving analytically. Finally, the construction process load sensitivity value is used to generate a continuous process density guiding field through linear interpolation.

4. The numerical simulation method for the construction process of a non-standard storage tank according to claim 3, characterized in that, Specifically, the geometric density guiding field for determining the three-dimensional geometric model and construction environment model of the non-standard storage tank is as follows: The three-dimensional geometric model and construction environment model of the non-standard storage tank are scanned to identify high curvature regions, abrupt thickness change regions, and complex topological regions in the model; sensitivity values ​​are assigned to the regions to obtain sensitivity values, and spatial interpolation is performed on the sensitivity values ​​to form a continuous geometric density guiding field.

5. The numerical simulation method for the construction process of a non-standard storage tank according to claim 1, characterized in that, Specifically, S3 is: S3.1: Construct a three-dimensional geometric model of the non-standard storage tank based on its basic design data; S3.2: Simplify and repair the three-dimensional geometric model of the non-standard storage tank to obtain the processed three-dimensional geometric model; S3.3: Define the geometric state of the construction stage for the processed three-dimensional geometric model, and construct three-dimensional geometric models for different construction stages; S3.4: Construct a construction environment model; S3.5: Integrate the three-dimensional geometric models of the different construction stages and the construction environment model to obtain the three-dimensional geometric model and construction environment model of the non-standard storage tank.

6. The numerical simulation method for the construction process of a non-standard storage tank according to claim 5, characterized in that, The basic design data includes the general layout, component drawings, and detailed node drawings of the non-standard storage tank. The general layout describes the overall outline, main dimensions, relative positions of components, and connection methods of the non-standard storage tank. The component drawings include the bottom plate layout, wall panel layout, unfolded head drawing, internal component drawing, and external accessory drawing. The bottom plate layout and wall panel layout drawings describe the dimensions, curvature, wall thickness, numbering, and bevel form of each wall panel. The internal component drawings include the reinforcing ring drawing, partition drawing, and internal floating roof track drawing. The external accessory drawings include the ladder drawing, platform drawing, nozzle drawing, manhole drawing, level gauge interface drawing, and reinforcing rib drawing. The detailed node drawings describe the detailed structure of complex connection parts, including the welding joint between the nozzle and the shell, the connection joint between the support and the shell, and the butt joint of plates of different thicknesses.

7. The numerical simulation method for the construction process of a non-standard storage tank according to claim 5, characterized in that, The simplification of the three-dimensional geometric model of the non-standard storage tank specifically involves deleting details that have minimal impact on the overall strength and stiffness of the three-dimensional geometric model; the geometric repair specifically involves using the repair tools built into the three-dimensional CAD software to detect and repair the three-dimensional geometric model of the non-standard storage tank.

8. The numerical simulation method for the construction process of a non-standard storage tank according to claim 1, characterized in that, The construction information data for the non-standard storage tanks includes basic design data, construction process data, key construction procedures and potential risk factors data, and material data.

9. The numerical simulation method for the construction process of a non-standard storage tank according to claim 8, characterized in that, The basic design data includes the dimensions and bill of materials of the general drawing, component drawings, and detailed node drawings of the non-standard storage tank. The construction process data includes the specific construction process of the non-standard storage tank, including plate procurement and inspection, plate transportation and storage, prefabrication, component assembly, segmented hoisting and assembly, circumferential / longitudinal seam welding, non-destructive testing, overall hoisting, accessory installation, hydrostatic testing, corrosion protection and insulation, and final acceptance. The key construction procedures and potential risk factors specifically include large-component hoisting, thick plate welding, complex node assembly, heat treatment, excessive welding heat input, improper selection of hoisting points, and instability of temporary supports.

10. A numerical simulation system for the construction process of non-standard storage tanks, characterized in that, The system employs a numerical simulation method for the construction process of non-standard storage tanks as described in any one of claims 1-9, and the system comprises: The data acquisition module is used to collect construction information data for non-standard storage tanks; The preprocessing module is used to perform data structuring processing on the non-standard storage tank construction information data to obtain the processed non-standard storage tank construction information data; The model building module is used to construct a three-dimensional geometric model and a construction environment model of the non-standard storage tank by combining the processed construction information data of the non-standard storage tank. The mesh generation module is used to perform finite element mesh generation on the three-dimensional geometric model and construction environment model of the non-standard storage tank; The numerical simulation module is used to perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

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