Non-standard storage tank construction process numerical simulation method and system

Abstract

The invention relates to the technical field of engineering numerical simulation, in particular to a numerical simulation method and system for the construction process of a non-standard storage tank. According to the method, an analysis layer is created according to a construction stage, a construction process density guide field and a geometric density guide field are determined according to the analysis layer, a self-adaptive grid density field is generated, and then finite element grid division is performed; when finite element mesh generation is carried out on multiple models, an engineer only needs to define a construction stage and an analysis target, the mesh generation process can be automatically completed, the pretreatment period is greatly shortened, the human error risk is reduced, and the method is particularly suitable for processing complex and changeable non-standard storage tank construction simulation.

Description

TECHNICAL FIELD

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

[0002] Non-standard tanks generally refer to tanks whose volume, diameter, height and structural form do not conform to national or industry standard atlases. Due to the uniqueness of the structure, large deformations and internal stresses are easily generated during the construction process. 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 the construction process of a non-standard tank, the quality of the 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 multiple stages and multiple physical fields 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, dividing the entire wall plate into shell elements and the thick bottom plate 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 irregular structure and complex welds of non-standard tanks are high-risk areas for stress concentration. Traditional adaptive meshing is prone to produce distorted 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, resulting in low efficiency. SUMMARY

[0004] 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: S1: Collecting non-standard tank construction information data; S2: Structuring the non-standard tank construction information data to obtain processed non-standard tank construction information data; S3: Constructing a three-dimensional geometric model and a construction environment model of the non-standard tank in combination with the processed non-standard tank construction information data; S4: Dividing the three-dimensional geometric model and the construction environment model of the non-standard tank into finite element meshes; The S4 is specifically: S4.1: determining the analysis layer of the finite element grid in the three-dimensional geometric model of the non-standard storage tank and the construction environment model according to the construction stage and the analysis target; S4.2: generating an adaptive grid density field according to the analysis layer; specifically: determining a construction process density guide field according to the analysis layer; determining a geometric density guide field of the three-dimensional geometric model of the non-standard storage tank and the construction environment model; fusing and smoothing the construction process density guide field and the geometric density guide field to obtain an adaptive grid density field; S4.3: performing finite element grid division according to the adaptive grid density field; S5: realizing the construction numerical simulation of the non-standard storage tank according to the divided finite element grid.

[0006] Preferably, the S4.1 is specifically: creating an analysis layer according to the construction stage, the analysis layer including a prefabrication processing stage analysis layer, a part assembly stage analysis layer, a welding construction stage analysis layer, and a whole forming and hoisting stage analysis layer; determining the corresponding analysis layer target and the dominant physical field according to the analysis layer; setting the priority and the network resource allocation weight of the analysis layer.

[0007] Preferably, the key process parameters of the analysis layer are determined according to the analysis layer target corresponding to the analysis layer, and the key process parameters are specifically: 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 according to the key process parameters; for the prefabrication processing stage analysis layer and the part assembly stage analysis layer, the construction process load sensitivity value is input into a structural mechanics model by inputting the process parameters corresponding to the layer into the structural mechanics model, and the construction process load sensitivity value is calculated by solving the analytical solution; for the welding construction stage analysis layer, the construction process load sensitivity value is input into a double-ellipsoid model by inputting the process parameters corresponding to the layer into the double-ellipsoid model, and the construction process load sensitivity value is determined by solving the analytical solution; for the whole forming and hoisting stage analysis layer, the construction process load sensitivity value is input into a simply supported beam model by inputting the process parameters corresponding to the layer into the simply supported beam model, and the construction process load sensitivity value is determined by solving the analytical solution; finally, the construction process load sensitivity value is generated into a continuous process density guide field by linear interpolation.

[0008] Preferably, the geometric density guide field of the three-dimensional geometric model of the non-standard storage tank and the construction environment model is specifically: The three-dimensional geometric model of the non-standard storage tank and the construction environment model are scanned, and the high-curvature regions, thickness mutation regions, and complex topological regions in the model are identified; the sensitivity values are obtained by assigning sensitivity values to the regions, and the continuous geometric density guide field is formed by spatial interpolation of the sensitivity values.

[0009] Preferably, S3 is specifically: S3.1: constructing a three-dimensional geometric model of the non-standard tank based on the basic design data of the non-standard tank; S3.2: model simplification and repair of the three-dimensional geometric model of the non-standard tank to obtain a processed three-dimensional geometric model; S3.3: construction stage geometric state definition of the processed three-dimensional geometric model, and construction of three-dimensional geometric models of different construction stages; S3.4: constructing a construction environment model; S3.5: model integration of the three-dimensional geometric models of different construction stages and the construction environment model to obtain a three-dimensional geometric model and a construction environment model of the non-standard tank.

[0010] Preferably, the basic design data includes general layout, component layout, and node detail layout of the non-standard tank, the general layout is used to describe the overall outline, main dimensions, relative positions of components, and connection methods of the non-standard tank; the component layout includes floor layout, wall layout, unrolled head layout, internal component layout, and external accessory layout, the floor layout and the wall layout are used to describe the size, curvature, wall thickness, number, and beveling form of each wall plate, the internal component layout includes stiffening ring layout, partition layout, and internal floating plate track layout, the external accessory layout includes ladder layout, platform layout, nozzle layout, manhole layout, liquid level meter interface layout, and reinforcing rib layout, the node detail layout is used to describe the detailed structure of complex connection parts, the complex connection parts include welding nodes of nozzles and shells, connection nodes of supports and shells, and butt joint nodes of different thickness plates.

[0011] Preferably, the model simplification of the three-dimensional geometric model of the non-standard tank specifically refers to deleting details that have little effect on the overall strength and rigidity of the three-dimensional geometric model; the geometric repair specifically refers to detecting and repairing the three-dimensional geometric model of the non-standard tank by using the repair tool of the three-dimensional CAD software.

[0012] Preferably, the non-standard tank construction information data includes basic design data, construction process flow data, key construction process and potential risk factor data, and material data.

[0013] Preferably, the basic design data includes the size of the general layout, component layout, and node detail layout of the non-standard tank, and a bill of materials. The construction process flow data includes specific construction process flow of the non-standard tank, including plate procurement and inspection, plate transportation and storage, prefabrication, component assembly, segmented hoisting and assembly, girth seam / longitudinal seam welding, non-destructive testing, overall hoisting, accessory installation, water pressure test, corrosion and heat preservation, and completion acceptance. The key construction process and potential risk factor data specifically include large hoisting, thick plate welding, complex node assembly, heat treatment, and excessive welding heat input, improper hoisting point selection, and temporary support instability.

[0014] According to another aspect of the present application, a non-standard tank construction process numerical simulation system is provided, which adopts the non-standard tank construction process numerical simulation method described above, and comprises: The acquisition module is configured to acquire non-standard tank construction information data. The preprocessing module is configured to perform data structuring processing on the non-standard tank construction information data to obtain processed non-standard tank construction information data. The model establishment module is configured to construct a three-dimensional geometric model and a construction environment model of the non-standard tank in combination with the processed non-standard tank construction information data. The mesh division module is configured to perform finite element mesh division on the three-dimensional geometric model and the construction environment model of the non-standard tank. The numerical simulation module is configured to realize the non-standard tank construction numerical simulation according to the divided finite element mesh.

[0015] The embodiments of the present application have the following technical effects: The present application creates an analysis layer according to the construction stage, determines the construction process density guide field and the geometric density guide field according to the analysis layer, and generates an adaptive mesh density field, and then performs finite element mesh division. When multiple models perform finite element mesh division, engineers only need to define the construction stage and the analysis target, and the mesh division process can be automatically completed, which greatly shortens the preprocessing cycle, reduces the risk of human error, and is especially suitable for processing complex and variable non-standard tank construction simulation.

[0016] Meanwhile, through the adaptive mesh density field provided by the present application, valuable mesh resources can be accurately allocated to the most needed places, avoiding wasting computing power in irrelevant areas. Compared with the adaptive mesh density field of the prior art, the number of meshes can be reduced by 30%-60% under the same calculation accuracy, and the solving accuracy of the key area can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0018] Figure 1 is a flowchart of a non-standard tank construction process numerical simulation method provided by the embodiments of the present application. Figure 2 is a flowchart provided by an embodiment of the present application for constructing a three-dimensional geometric model of a non-standard storage tank and a construction environment model based on processed non-standard storage tank construction information data; Figure 3 is a flowchart provided by an embodiment of the present application for performing finite element meshing on the three-dimensional geometric model of the non-standard storage tank and the construction environment model. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0020] Embodiment 1, Figure 1 shows a flowchart of a non-standard storage tank construction process numerical simulation method, as Figure 1 shown, a non-standard storage tank construction process numerical simulation method includes the following steps: S1: collecting non-standard storage tank construction information data; The non-standard storage tank construction information data includes basic design data, construction process data, and key construction process and potential risk factor data.

[0021] The basic design data includes the size of the general layout, component layout, node detail layout, material list, etc. of the non-standard storage tank.

[0022] 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, part assembly, segmented hoisting and assembly, girth seam / longitudinal seam welding, non-destructive testing, overall hoisting, accessory installation, water pressure test, corrosion and heat preservation, completion acceptance, etc.

[0023] The key construction process and potential risk factor data are construction processes that have a significant impact on the forming quality and structural safety of the non-standard storage tank, and potential risk factors that may cause deformation exceeding the standard, stress concentration, or safety accidents, including large hoisting, thick plate welding, complex node assembly, heat treatment, etc., and excessive welding heat input, improper hoisting point selection, temporary support instability, etc.

[0024] S2: performing data structure processing on the non-standard storage tank construction information data to obtain processed non-standard storage tank construction information data; For subsequent calling and management, in this step, the non-standard storage tank construction information data collected in S2 is standardized to form structured processed non-standard storage tank construction information data.

[0025] S3: combining the processed non-standard storage tank construction information data to construct a three-dimensional geometric model and a construction environment model of the non-standard storage tank; In this step, the three-dimensional geometric model and the construction environment model of the non-standard storage tank are constructed to accurately reflect the three-dimensional integrated digital model of the geometric shape of the non-standard storage tank at each key construction stage and the interaction with the construction environment, thereby providing an accurate geometric basis for subsequent finite element mesh division and numerical analysis.

[0026] Specifically, as shown in Figure 2 S3 is specifically: S3.1: constructing a three-dimensional geometric model of the non-standard storage tank based on the processed non-standard storage tank construction information data; The three-dimensional geometric model of the non-standard storage tank is constructed based on the basic design data of the processed non-standard storage tank construction information data, which includes general drawings, component drawings, and node detail drawings. The general drawings are used to describe the overall outline, main dimensions, relative positions of components, and connection methods of the non-standard storage tank. The component drawings include bottom plate layout drawings, wall plate layout drawings, unrolled drawings of heads, internal component drawings, and external accessory drawings. The bottom plate layout drawings and the wall plate layout drawings are used to describe the size, curvature, wall thickness, number, and bevel form of each wall plate. The internal component drawings include stiffener drawings, partition drawings, and inner floating disc track drawings. The external accessory drawings include ladder drawings, platform drawings, nozzle drawings, manhole drawings, liquid level meter interface drawings, and reinforcing rib drawings. The node detail drawings are used to describe the detailed structure of complex connection sites, including the welding nodes of nozzles and shells, the connection nodes of supports and shells, and the butt joint nodes of different thickness plates.

[0027] In this step, the three-dimensional geometric model of the non-standard storage tank is constructed by three-dimensional CAD software. The modeling is performed in parts. For cylindrical wall plates, if they are standard arc-shaped, they are generated by stretching or rotating. If they are wall plates spliced from multiple pieces with different curvatures, each wall plate is accurately drawn according to the layout drawing. For variable wall thickness wall plates, the shell command or multiple entity combinations are used to achieve the modeling. For heads, if they are standard heads with known equations, the built-in head model of the software is directly called and the parameters are modified. If they are special-shaped heads, accurate surface modeling is performed according to the curve equation provided by the design.

[0028] The connection and cutting relationship between the components of the non-standard storage tank, such as the opening and connection of nozzles and shells, and the welding bevel of bottom plates and wall plates, are processed by the Boolean operation of three-dimensional CAD software.

[0029] S3.2: Model simplification and repair of the three-dimensional geometric model of the non-standard tank is performed to obtain a processed three-dimensional geometric model; In this step, under the premise of ensuring calculation accuracy, the details of the three-dimensional geometric model of the non-standard tank that have little effect on structural mechanical properties are removed to simplify the model complexity, reduce unnecessary calculation resource consumption, and improve the quality and efficiency of meshing. At the same time, geometric defects that may be generated in the modeling process are repaired. Specifically, the model simplification of the three-dimensional geometric model of the non-standard tank includes deleting details that have little effect on the overall strength and stiffness of the three-dimensional geometric model, such as non-load-bearing small chamfers, small fillets, surface decorative patterns, identification, temporary process holes, and process accessories with extremely small diameter and welded to the main structure; for dense and regular distribution of small features, if the overall effect is much larger than the individual effect, consider replacing them with equivalent homogeneous material properties or simplified beam / plate element array; merge multiple adjacent parts that have no independent effect on analysis into one whole part for modeling.

[0030] The geometric repair specifically includes using the repair tool provided by the three-dimensional CAD software to detect and repair the three-dimensional geometric model of the non-standard tank, including stitching gaps, deleting duplicate surfaces, filling holes, unifying surface normals, removing small edges / surfaces, etc., to ensure that the model becomes a watertight and effective geometric entity.

[0031] S3.3: Construction stage geometry definition is performed on the processed three-dimensional geometric model, and three-dimensional geometric models of different construction stages are constructed; The construction of the non-standard tank is a dynamic process, and the geometric shape of the non-standard tank changes as the construction process progresses. In this step, the three-dimensional geometric state of the tank at each key construction process completion or a specific time is defined to perform independent or continuous numerical simulation for each construction state.

[0032] The construction stage includes the prefabrication processing stage, the part assembly stage, the welding construction stage, and the overall forming and hoisting stage.

[0033] In this step, based on the processed three-dimensional geometric model and the construction stage, different construction stage geometric models are constructed by hiding uninstalled parts, displaying installed parts, moving parts to designated positions, etc.

[0034] S3.4: Construction environment model is constructed; The non-standard tank is integrated modeled with the construction environment and various tools, equipment and loads used in the construction, and a complete tank-environment-tool-load system model is constructed to accurately simulate the interaction among them.

[0035] In particular, the construction environment model includes a support system model and a hoisting system model; the support system includes temporary supports, permanent supports, molds, fixtures, ground anchors and the like, and a geometric model of the support system is established according to the actual structure and material of the supports. For simple supports, a CAD basic voxel is directly created, and for complex truss gantries, the design drawings are built; and the contact mode and connection relationship between the support system and the non-standard tank are defined. The hoisting system includes cranes, hoisting rigs, balance beams, special lifting lugs and the like, and is modeled by the three-dimensional CAD software.

[0036] In establishing the construction environment model, the construction loads and environmental conditions need to be considered, the construction loads include gravity loads, hoisting loads, wind loads, temperature loads and operation loads, the gravity loads are the structural weight of the non-standard tank itself, the weight of accessories, the weight of installed parts, the weight of construction materials, the weight of hoisting rigs during hoisting and the like. The gravity acceleration is applied to automatically calculate on the construction environment model; the hoisting load is the tension of the hoisting rig on the lifting lug, which is the key load for hoisting analysis, and the value of the hoisting load is estimated by the crane performance table; the wind load is the natural wind or mechanical wind that may be encountered during construction, and the wind pressure at different heights is calculated according to local meteorological data and specifications, and is converted into a pressure load acting on the windward surface of the non-standard tank; the temperature load is composed of the environmental temperature and the welding heat load; the operation load is the weight of the construction personnel and small construction tools and the dynamic force generated by the operation.

[0037] S3.5: Model integration is performed on the three-dimensional geometric models of different construction stages and the construction environment model to obtain a three-dimensional geometric model of the non-standard tank and a construction environment model.

[0038] 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 the spatial relationship, and in the model integration process, it is ensured that all models are in the same coordinate system, and the components are positioned and constrained according to the actual installation and construction conditions.

[0039] S4: Finite element meshing is performed on the three-dimensional geometric model of the non-standard tank and the construction environment model. In the numerical simulation of the construction process of non-standard tanks, the quality of the 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 multiple stages and multiple physical fields 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 wallboard 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 for stress concentration. The traditional adaptive meshing is prone to produce irregular elements when dealing with these geometric discontinuous features, resulting in a decrease in calculation accuracy or even failure to solve, which requires a large amount of manual intervention for local repair, which is inefficient.

[0040] The embodiment proposes a construction process-oriented adaptive layered heterogeneous finite element meshing method, which automatically adjusts the mesh density of key areas according to the simulated construction stage and analysis target; at the same time, in a single component or region, according to the local curvature, thickness and stress gradient prediction, a grid density field is formed according to the demand distribution; at the same time, a grid generation algorithm based on geometric streamline and feature-driven is introduced to ensure that the mesh of special-shaped structures and complex weld areas is regular and orderly, reducing the generation of irregular elements from the source. Through the above improvements, while ensuring accurate capture of key physical phenomena, the overall mesh size is significantly reduced, and the calculation period is shortened.

[0041] Specifically, as shown in Figure 3 S4 specifically comprises: S4.1: determining an analysis layer of a finite element mesh in a three-dimensional geometric model and a construction environment model of the non-standard tank according to a construction stage and an analysis target; In this step, based on the dynamics of the construction process of the non-standard tank and the diversity of the analysis target, the three-dimensional geometric model and the construction environment model of the non-standard tank are layered by logic, each analysis layer focuses on a specific construction stage and a core analysis target, thereby configuring the optimal mesh resources for the most decisive physical phenomenon in that stage; In the step, the construction stage includes a prefabrication processing stage, a component assembly stage, a welding construction stage, and an overall forming and hoisting stage; the analysis target refers to a scientific or engineering problem that is most concerned and most needed to be clarified in the finite element mesh division in a specific construction stage. Exemplarily, in the welding construction stage, the analysis target is welding residual stress and deformation; in the overall forming and hoisting stage, the analysis target is structural stiffness and lug local strength; in the prefabrication processing stage and the component assembly stage, the analysis target is component strength and stability.

[0042] The S4.1 specifically includes: creating an analysis layer according to the construction stage, and the analysis layer includes a prefabrication processing stage analysis layer, a component assembly stage analysis layer, a welding construction stage analysis layer, and an overall forming and hoisting stage analysis layer.

[0043] The corresponding analysis layer target and dominant physical field are determined according to the analysis layer; The analysis target of the welding construction stage analysis layer is welding residual stress and deformation, and the dominant physical field is a thermal-structural strong coupling physical field; the analysis target of the overall forming and hoisting stage analysis layer is structural stiffness and lug local strength, and the dominant physical field is a static / dynamic structural mechanics physical field; the analysis target of the prefabrication processing stage analysis layer and the component assembly stage analysis layer is component strength and stability, and the dominant physical field is a linear elasticity / elastic-plastic structural mechanics physical field; The priority of the analysis layer and the network resource allocation weight are set; In the construction process of the non-standard storage tank, there are multiple analysis layers, and due to limited computing resources, the importance of different analysis layers needs to be sorted so as to be selected or focused on when the resources are scarce; in the step, the analysis layer is divided into a high-priority layer, a medium-priority layer, and a low-priority layer, 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.

[0044] Therefore, each analysis layer file contains the three-dimensional geometric model and the construction environment model of the associated non-standard storage tank, the analysis target and the dominant physical field of the stage, the priority and the weight of the layer in the finite element mesh division process.

[0045] S4.2: generating an adaptive mesh density field according to the analysis layer; The construction process density guide field is determined according to the analysis layer; 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.

[0046] Determine the geometric density guiding field of the three-dimensional geometric model and the construction environment model of the non-standard storage tank; 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.

[0047] An adaptive grid density field is obtained by fusing and smoothing the construction process density guiding field and the geometric density guiding field. 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.

[0048] S4.3: Perform finite element mesh generation based on the adaptive mesh density field; 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.

[0049] 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.

[0050] S5: Perform numerical simulation of the construction of the non-standard storage tank based on the divided finite element mesh.

[0051] 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: 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.

[0052] Example 3: The present invention also provides an electronic device, including one or more processors and a memory.

[0053] 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.

[0054] The memory can include one or more computer program products that can include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory, for example, can include random access memory (RAM), and / or a cache, and / or the like. The non-volatile memory, for example, can include read-only memory (ROM), hard disk, flash memory, and / or the like. The computer-readable storage media can store one or more computer program instructions that, when executed by the processor, can implement the non-tank construction process numerical simulation method of any embodiment of the present application described above and / or other desired functions. Various contents such as initial external parameters, threshold values, and the like can also be stored in the computer-readable storage medium.

[0055] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application.

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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