Sandwich steel lining type underground high-pressure gas storage tank and performance simulation analysis method thereof

Abstract

The invention relates to the technical field of underground high-pressure gas storage structures, in particular to a sandwich steel lining type underground high-pressure gas storage tank and a performance simulation analysis method thereof. The gas storage tank is characterized in that the outer side of a gas storage cavity is wrapped by a composite lining structure, a plurality of drainage holes are formed around the gas storage cavity, anchor rods are fixed in intervals between every two drainage holes, and a gas inlet / outlet (pipe) is formed in the top end of the gas storage cavity and communicated with the outside through a traffic / overhaul channel; the method comprises the steps of collecting parameters of the gas storage tank to create a three-dimensional geometric model of the gas storage tank, establishing a simulated earthquake database, simulating the effects of earthquakes of different earthquake magnitudes on the gas storage tank, and obtaining a stress distribution diagram and a deformation diagram of the gas storage tank; and comparing the simulation data with the collected data to obtain potential problems and adjust the structure of the gas storage tank. A sandwich type is adopted, surrounding rock is fully utilized for bearing, the using amount of steel linings can be greatly reduced, and meanwhile the purposes of bearing high internal pressure, resisting external pressure stably and reducing the construction cost are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground high-pressure gas storage structures, and in particular to a sandwich steel-lined underground high-pressure gas storage tank and a performance simulation analysis method thereof. Background Art

[0002] At present, in the underground high-pressure gas storage related industries (such as compressed air energy storage, compressed natural gas, etc.), the underground cavern structures used to store high-pressure gas are generally divided into two types: unlined and lined. The unlined form is generally located in ultra-deep underground space or requires high groundwater pressure to achieve pressure balance, and has strict requirements on the permeability coefficient of the surrounding rock, so the application scenarios are relatively limited. The lined form is currently a widespread choice for underground high-pressure gas storage caverns. Steel plates are generally used as lining seals, and buffer layers, concrete lining layers, grouting layers, etc. are arranged outward in sequence. It is a multi-layer composite force-bearing structure. This type of composite force-bearing structure can withstand high internal pressure, but considering the rigidity of the large-size steel plate itself and the stability of the steel lining against external pressure during maintenance and emptying, the required thickness is relatively large, and there are problems of high cost, resistance to external pressure deformation, and stability.

[0003] Prior art 1, Chinese patent, application number 202310268129.X discloses an underground high-pressure gas storage system, including: an annular chamber, a transverse passage, a shaft and a blind head; the annular chamber is connected end to end through a blind head to form a gas storage space; the side wall of the annular chamber includes a corrugated arch steel lining assembly and a lining structure from the inside to the outside; one end of the transverse passage is connected to the annular chamber through a blind head, and the other end is connected to the bottom of the shaft, and the top of the shaft is connected to the ground; the blind head is arranged at the connection between the transverse passage and the annular chamber. Although the force of gas pressure on the steel lining can be reduced, the force of the steel lining is greatly reduced, the thickness of the steel lining is greatly reduced, and investment is saved. It is also more convenient when constructing the steel lining, and the construction efficiency is improved; however, the design of the blind head increases the complexity and cost of construction, and the operation is more difficult.

[0004] Prior art 2, Chinese patent, application number 202410195227.X discloses a sealing plug structure and construction method for an underground high-pressure gas storage reservoir, including a connecting pipe passing through the sealing plug, a sealing plug is provided in the expanded excavation area at the end of the gas storage reservoir, and the sealing plug is a reinforced concrete structure; the outer periphery of the sealing plug is tightly fitted with surrounding rock, and a unique transmission pipeline is provided inside the sealing plug, one end of the transmission pipeline is connected to the inside of the gas storage reservoir, and the other end is connected to the outside of the gas storage reservoir, in an L-shaped arrangement; the end of the transmission pipeline located outside the gas storage reservoir is connected to a tapered reducer pipe section and a charging and discharging channel in sequence, and the transmission pipeline is connected to the tapered reducer pipe section through a primary flange, and the tapered reducer pipe section is connected to the charging and discharging pipe through a secondary flange. Although the only transmission pipeline is provided inside the concrete sealing plug to undertake the functions of gas transportation and personnel entry and exit, it effectively reduces the internal pipeline space of the sealing plug and reduces the risk of air leakage, and has higher safety; however, the required thickness is relatively large, and there are problems of high cost, resistance to external pressure deformation and stability.

[0005] Prior art three, Chinese patent, application number 202410941927.9 discloses a multi-layer sealed cave wall structure and construction method of an underground high-pressure gas storage, including surrounding rock located in the outer layer, a concrete lining layer for transferring the internal air pressure of the high-pressure gas storage to the surrounding rock is attached to the inner side of the surrounding rock, an elastic transition layer for filling the cracks of the concrete lining layer is sprayed on the inner side of the concrete lining layer, and an aluminum plate sealing layer is attached to the inner side of the elastic transition layer; adjacent aluminum plate sealing layers are overlapped, and the overlapping positions of the aluminum plate sealing layers are bonded with sealant, and fixed by embedded bolts embedded in the concrete lining layer, and the overlapping positions of the aluminum plate sealing layers are provided with sealing gaskets between the corresponding elastic transition layers. Although the separation of the sealing layer and the high-pressure bearing layer is achieved, it not only meets the extreme requirements under the operating conditions of the gas storage, ensures the reliability and sealing of the underground gas storage, but also reduces the construction period and construction difficulty; however, under the action of high-pressure gas, cracks are prone to appear in the concrete lining layer, resulting in the durability of the sealing layer being affected.

[0006] At present, the existing technologies 1, 2 and 3 have the problems of large-size steel plates, the rigidity of the steel linings during maintenance and venting, the required thickness is large, the cost is high, and the deformation and stability of the steel linings are high. Therefore, the present invention proposes a sandwich steel-lined underground high-pressure gas storage tank and its performance simulation analysis method, which can meet the requirements of stability, deformation and sealing while reducing the amount of steel used and the engineering cost. Summary of the invention

[0007] The main purpose of the present invention is to provide a sandwich steel-lined underground high-pressure gas storage tank and a performance simulation analysis method thereof, so as to solve the problems in the prior art of large-size steel plates having their own rigidity, the steel lining being stable against external pressure during maintenance and emptying, the required large thickness, the high cost, and the deformation and stability against external pressure.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method, the sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method comprising:

[0010] Collect the real-time parameters of the gas tank, such as the pressure, temperature and deformation of the gas tank, and perform preprocessing; input the preprocessed gas tank structure data into the simulation equipment, create a three-dimensional geometric model of the gas tank, and discretize the three-dimensional geometric model of the gas tank into a finite element network;

[0011] According to the data of different magnitudes of historical earthquakes, a simulated earthquake database of different magnitudes is established, and the database is added to the simulation database to simulate the effects of earthquakes of different magnitudes on the gas storage tank, and the stress distribution diagram and deformation diagram of the gas storage tank are obtained;

[0012] The stress distribution map and deformation map data obtained by simulation are compared with the stress distribution map and deformation map data generated by the collected real-time parameters of the gas tank to obtain the potential problems of the underground gas tank structure, and the gas tank structure is adjusted according to the potential problems of the structure.

[0013] As a further improvement of the present invention, the process of creating a three-dimensional geometric model of a gas storage tank includes:

[0014] The preprocessed gas tank parameters are screened to obtain basic geometric element parameters of the gas tank; multiple point coordinate pairs are defined for the basic geometric elements, and the boundaries of the model are formed by connecting the coordinates;

[0015] Use the boundary blending function to connect different surfaces to make a smooth transition at the boundary, refine the surface, and generate a smoother surface by adding new coordinates at each point coordinate and calculating its position;

[0016] The 3D geometric model of the gas tank is optimized and rendered, and texture and material attribute parameters are added. After the settings are completed, it is input into the simulation device.

[0017] As a further improvement of the present invention, the process of discretizing the three-dimensional geometric model of the gas storage tank into a finite element network includes:

[0018] Determine the type, real constants, material properties and coordinate system of the underground gas storage tank, set the fine grid density in the area where the material properties change, generate the grid according to the unit properties, check the grid after generation, and merge the generated grid with other parts of the model;

[0019] According to the construction material properties of the underground gas storage tank, the Young's modulus, Poisson's ratio and density material parameters of each small unit are determined; according to the construction environment of the underground gas storage tank, the boundary conditions such as fixed support and displacement constraints of the model and the applied loads such as gravity, pressure and temperature are defined;

[0020] The local equations of all small units are combined into an overall set of equations, and the equations are solved to obtain the response of the model. After the solution is completed, the corresponding stress distribution diagram and deformation diagram are drawn for the results.

[0021] As a further improvement of the present invention, the process of simulating the effect of an earthquake on a gas storage tank includes:

[0022] Collect earthquake records and related parameters of different magnitudes in historical earthquake data, and organize earthquake waveform data; generate corresponding seismic motion records according to different magnitudes, organize the generated seismic motion records into a database, and apply the seismic motion records to the model;

[0023] Simulate the dynamic response of underground gas storage tanks under earthquake action, analyze the stress distribution and deformation of underground gas storage tanks under earthquake action, and obtain their hoop stress and vertical stress parameters; according to the obtained parameters, obtain the stress distribution diagram and deformation diagram of underground gas storage tanks;

[0024] The obtained stress distribution diagram and deformation diagram of the underground gas storage tank are displayed on the visualization device; the calculation results are verified according to historical data and optimized and adjusted according to the verification results.

[0025] As a further improvement of the present invention, the process of establishing a simulated earthquake database includes:

[0026] Collect data of different magnitude scales of body wave magnitude, surface wave magnitude and moment magnitude of historical earthquakes, and perform pre-processing such as scanning, image processing and format conversion on historical earthquake data;

[0027] Compile a unified earthquake catalog containing the magnitude and depth information of earthquake events, remove foreshocks and aftershocks, and keep only the main shock events; divide the earthquake magnitude into different intervals and convert different magnitudes into moment magnitudes;

[0028] Create a distributed database and partition table, and import the processed earthquake data; set up a simulated earthquake database of different magnitudes according to the divided intervals, including the uncertainty parameters of focal depth, inclination and radiation coefficient.

[0029] As a further improvement of the present invention, the process of analyzing the underground gas storage tank under earthquake action includes:

[0030] According to historical earthquake records, different intervals of earthquake magnitude in the compiled earthquake catalog are used as input loads in turn and applied to the bottom of the gas tank model to simulate the effects of earthquakes of different magnitudes on the underground gas tank;

[0031] Use modal analysis to extract the natural frequency and vibration mode of the gas tank, evaluate the strain and deformation response of the gas tank under earthquakes of different magnitudes, and perform time history analysis to obtain the detailed stress and deformation response of the gas tank;

[0032] The changes in the hoop stress, axial stress and radial stress on the gas tank are analyzed, and the stress distribution diagram and deformation diagram of the gas tank are drawn according to the stress distribution and deformation degree on the gas tank obtained by simulation.

[0033] As a further improvement of the present invention, the process of drawing the stress distribution diagram and the deformation diagram of the gas storage tank includes:

[0034] Extract the stress value and deformation amount of each part of the gas tank from the stress distribution and deformation degree of the gas tank obtained by simulation; clean and normalize the extracted data to remove abnormal values ​​and noise;

[0035] Determine the drawing parameters according to the geometric structure and simulation results of the gas tank; select the color mapping scheme according to the distribution range of the stress value; set the legend to clarify the stress value range corresponding to each color; set the coordinate axis and grid according to the geometric shape of the gas tank; map the normalized stress data to the geometric model of the gas tank to generate a stress distribution cloud map; import the three-dimensional geometric model of the gas tank into the drawing software, correspond the normalized stress data to each node or unit in the geometric model, and use the color mapping scheme to visualize the stress value; generate a stress distribution cloud map through the drawing function;

[0036] The deformation data is processed to calculate the deformation of each part of the gas tank; based on the simulation results, the deformation of each part of the gas tank is calculated, including displacement and strain; the deformation data is mapped to the geometric model of the gas tank to generate a deformation cloud map to show the deformation of the gas tank under different earthquake magnitudes; the normalized deformation data is matched with each node or unit in the geometric model, and the deformation is visualized using a color mapping scheme; the deformation cloud map is generated through the drawing function.

[0037] As a further improvement of the present invention, the process of obtaining potential problems of the underground gas storage tank structure includes:

[0038] Receive stress distribution and deformation map data from simulation models and real-time sensors, extract key features, stress concentration areas and deformation patterns in the images; compare the similarities and differences between simulation data and real-time data; output comparison results, including similarity scores, difference area markings and potential problem identification;

[0039] Use convolutional neural networks to extract key features in images, generate feature vectors, and perform dimensionality reduction on feature vectors; identify and match key points in simulation and real-time data, and calculate similarity scores between the two sets of data; and intuitively display the differences between simulation and real-time data by marking different areas;

[0040] Use autoencoders to identify stress concentration areas and deformation anomalies, classify abnormal areas, and mark potential problem areas;

[0041] To achieve the above object, the present invention provides the following technical solutions:

[0042] A sandwich steel lined underground high-pressure gas storage tank device is applied to the sandwich steel lined underground high-pressure gas storage tank performance simulation analysis method, the sandwich steel lined underground high-pressure gas storage tank device is provided with a gas storage cavity; the outer side of the gas storage cavity is wrapped by a composite lining structure, a plurality of drainage holes are arranged around the gas storage cavity, and anchor rods are fixed in the intervals between the drainage holes, an inlet / outlet is arranged at the top of the gas storage cavity, and the inlet / outlet is connected to the outside through a traffic / maintenance passage; the entire gas storage tank device is surrounded by surrounding rock.

[0043] As a further improvement of the present invention, the composite lining structure comprises: an air storage cavity, a drainage hole, an anchor rod, surrounding rock, a concrete inner shell, a steel lining, a concrete lining outer shell, a drainage pipe, backfill concrete and shotcrete;

[0044] Among them, from the inside to the outside of the gas storage cavity are the concrete inner shell, steel lining, concrete lining outer shell, drainage pipe, backfill concrete, shotcrete and the outermost layer of surrounding rock; the drainage hole is connected to the drainage pipe, and the anchor rod is connected to the steel lining.

[0045] The present invention collects real-time parameters of a gas tank and performs preprocessing, thereby ensuring the accuracy and reliability of data; the preprocessed data is input into a simulation device, a three-dimensional geometric model of the gas tank is created, and discretized into a finite element network, thereby providing an accurate mathematical model; a simulated earthquake database of different magnitudes is established and added to the simulation database, thereby providing rich data support for simulating the effects of earthquakes of different magnitudes on the gas tank; through simulation, a stress distribution diagram and a deformation diagram of the gas tank under the action of an earthquake are obtained, thereby providing an important basis for evaluating the safety of the gas tank; by comparing the simulation results with the real-time collected data, potential problems of the gas tank structure, such as stress concentration, abnormal deformation, etc., can be discovered; and the gas tank structure can be adjusted according to the potential problems, thereby improving its seismic performance and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the steps of an embodiment of a method for simulating and analyzing the performance of a sandwich steel-lined underground high-pressure gas storage tank according to the present invention;

[0047] Figure 2 A schematic flow chart of the steps of creating a three-dimensional geometric model of a gas storage tank according to an embodiment of a method for simulating and analyzing the performance of a sandwich steel-lined underground high-pressure gas storage tank of the present invention;

[0048] Figure 3 A schematic flow chart of the steps of discretizing the three-dimensional geometric model of the gas storage tank into a finite element network in one embodiment of the sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method of the present invention;

[0049] Figure 4 A schematic flow chart of the steps of simulating the effect of an earthquake on a gas storage tank in one embodiment of a sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method of the present invention;

[0050] Figure 5 A schematic flow chart of the steps of establishing a simulated earthquake database in one embodiment of a sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method of the present invention;

[0051] Figure 6 A schematic flow chart of the steps of analyzing an underground gas storage tank under earthquake action in one embodiment of a sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method of the present invention;

[0052] Figure 7 A schematic flow chart of steps for obtaining potential problems of underground gas storage tank structure in one embodiment of the sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method of the present invention;

[0053] Figure 8 A schematic diagram of the connection relationship of an embodiment of a sandwich steel-lined underground high-pressure gas storage tank device of the present invention;

[0054] Fig. 9 It is a schematic diagram of the connection relationship of the composite lining structure of an embodiment of the sandwich steel lining underground high-pressure gas storage tank device of the present invention;

[0055] Fig.10 It is a structural schematic diagram of an embodiment of an electronic device of the present invention;

[0056] Fig.11 It is a schematic structural diagram of an embodiment of the storage medium of the present invention. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] The terms "first", "second" and "third" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0059] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] like Figure 1 As shown, this embodiment also provides an embodiment of a sandwich steel lined underground high pressure gas storage tank performance simulation analysis method. In this embodiment, the sandwich steel lined underground high pressure gas storage tank performance simulation analysis method specifically includes the following steps:

[0061] Step S1: collecting and preprocessing the real-time parameters of the gas storage tank such as the pressure, temperature and deformation of the gas storage tank; inputting the preprocessed gas storage tank structure data into a simulation device, creating a three-dimensional geometric model of the gas storage tank, and discretizing the three-dimensional geometric model of the gas storage tank into a finite element network;

[0062] Step S2: according to the data of different magnitudes of historical earthquakes, a simulated earthquake database of different magnitudes is established, and the database is added to the simulation database to simulate the effects of earthquakes of different magnitudes on the gas storage tank, and obtain a stress distribution diagram and a deformation diagram of the gas storage tank;

[0063] Step S3: Compare the stress distribution map and deformation map data obtained by simulation with the stress distribution map and deformation map data generated by the collected real-time parameters of the gas storage tank to obtain potential problems of the underground gas storage tank structure, and adjust the gas storage tank structure according to the potential problems of the structure.

[0064] Preferably, the present embodiment collects real-time parameters of the gas tank and performs preprocessing to ensure the accuracy and reliability of the data; the preprocessed data is input into a simulation device to create a three-dimensional geometric model of the gas tank, and is discretized into a finite element network to provide an accurate mathematical model; a simulated earthquake database of different magnitudes is established and added to the simulation database, providing rich data support for simulating the effects of earthquakes of different magnitudes on the gas tank; through simulation, the stress distribution diagram and deformation diagram of the gas tank under the action of the earthquake are obtained, providing an important basis for evaluating the safety of the gas tank; by comparing the simulation results with the real-time collected data, potential problems of the gas tank structure, such as stress concentration, abnormal deformation, etc. can be found; adjusting the gas tank structure according to potential problems can improve its seismic performance and safety.

[0065] In summary, this embodiment achieves an accurate description of the actual operating state of the gas tank. The discretization of the finite element network makes the simulation more accurate and can more realistically reflect the behavior of the gas tank under earthquake. The simulation can cover a wider range of earthquake scenarios, improving the accuracy and comprehensiveness of the evaluation. The generation of stress distribution diagrams and deformation diagrams provides key data for comparative analysis. Through comparative analysis, an effective evaluation of the safety of the gas tank structure is achieved, providing a scientific basis for the optimization of the structure. The adjusted gas tank structure can better adapt to extreme environments such as earthquakes and ensure the safe operation of gas storage facilities.

[0066] Furthermore, if Figure 2 As shown, the process of creating the three-dimensional geometric model of the gas storage tank in step S1 specifically includes the following steps:

[0067] Step S11: screening the preprocessed gas tank parameters to obtain basic geometric element parameters of the gas tank; defining multiple point coordinate pairs for the basic geometric elements, and forming the boundary of the model by connecting the coordinates;

[0068] Step S12: using the boundary blending function to connect different surfaces so that they smoothly transition at the boundary, the surface is refined, and a smoother surface is generated by adding new coordinates at each point coordinate and calculating its position;

[0069] Step S13: Optimize and render the three-dimensional geometric model of the gas tank, add parameters such as texture and material attributes, and input them into the simulation device after the settings are completed.

[0070] Preferably, this embodiment screens the preprocessed gas tank parameters to obtain basic geometric element parameters of the gas tank, and connects to form the boundary of the model by defining multiple point coordinate pairs; uses the boundary blending function to connect different surfaces so that they transition smoothly at the boundary, and generates a smoother surface by refining the surface; optimizes and renders the three-dimensional geometric model of the gas tank, adds parameters such as texture and material properties, and inputs it into the simulation device.

[0071] In summary, this embodiment preliminarily outlines the outline of the gas tank by screening parameters and defining coordinate pairs to ensure the accuracy and authenticity of the model; smooth transitions and refined surfaces can eliminate the abruptness and unevenness in the model, making it closer to the appearance of the actual gas tank and improving the fineness and authenticity of the model; optimization and rendering make the model more realistic, and adding textures and material attributes can simulate the physical properties of the gas tank; the model is input into a simulation device for subsequent simulation analysis and testing.

[0072] Furthermore, if Figure 3 As shown, the process of discretizing the three-dimensional geometric model of the gas storage tank into a finite element network in step S1 specifically includes the following steps:

[0073] Step S14: determine the type, real constants, material properties and coordinate system of the underground gas storage tank, set fine grid density in the area where the material properties change, generate grids according to the unit properties, check the grids after generation, and merge the generated grids with other parts of the model;

[0074] Step S15: Determine the material parameters such as Young's modulus, Poisson's ratio and density of each small unit according to the construction material properties of the underground gas storage tank; define the boundary conditions such as fixed support and displacement constraints of the model and the applied loads such as gravity, pressure and temperature according to the construction environment of the underground gas storage tank;

[0075] Step S16: combine the local equations of all small units into an overall set of equations, and solve the set of equations to obtain the response of the model. After the solution is completed, draw the corresponding stress distribution diagram and deformation diagram for the results.

[0076] Preferably, this embodiment determines the type, real constants, material properties and coordinate system of the underground gas storage tank, sets a fine grid density in the area where the material properties change, and ensures the accuracy of the simulation results in the key area; generates a grid according to the unit properties, and checks the grid to ensure the quality and applicability of the grid; merges the generated grid with other parts of the model to form a complete simulation model; determines the material parameters according to the properties of the construction materials, defines the boundary conditions and loads of the model, and determines the key inputs and responses of the model; combines the local equations of all small units into an overall set of equations, and after solving the set of equations, draws stress distribution diagrams and deformation diagrams to intuitively display the simulation results.

[0077] In summary, this embodiment provides an accurate and complete model basis for simulation analysis, ensuring the reliability of simulation results; the setting of fine grids improves the accuracy of simulation, especially in key areas where material properties change; it ensures that the simulation analysis can accurately reflect the behavior of underground gas storage tanks in actual environments; the accuracy of simulation results is improved by setting precise material parameters and boundary conditions; by solving the overall set of equations, the stress distribution and deformation of the underground gas storage tank under specific conditions are obtained; the stress distribution diagram and deformation diagram provide intuitive simulation results, which are convenient for analyzing and evaluating the safety and performance of underground gas storage tanks.

[0078] Furthermore, if Figure 4 As shown, the process of simulating the effect of an earthquake on a gas storage tank in step S2 specifically includes the following steps:

[0079] Step S21: collecting earthquake records and related parameters of different magnitudes in historical earthquake data, and sorting out earthquake waveform data; generating corresponding seismic motion records according to different magnitudes, sorting the generated seismic motion records into a database, and applying the seismic motion records to the model;

[0080] Step S22: simulating the dynamic response of the underground gas storage tank under the action of an earthquake, analyzing the stress distribution and deformation of the underground gas storage tank under the action of an earthquake, and obtaining parameters such as its hoop stress and vertical stress; and obtaining a stress distribution diagram and a deformation diagram of the underground gas storage tank based on the obtained parameters;

[0081] Step S23: Display the obtained stress distribution diagram and deformation diagram of the underground gas storage tank on a visualization device; verify the calculation results according to historical data, and optimize and adjust them according to the verification results.

[0082] Preferably, this embodiment collects historical earthquake data, organizes earthquake waveform data, generates seismic motion records, and applies them to the model, thereby ensuring the accuracy and comprehensiveness of the model input data; by organizing earthquake waveform data and generating seismic motion records, the impact of different magnitudes on underground gas storage tanks can be simulated, thereby improving the accuracy and practicality of the simulation; through simulation, the specific stress distribution and deformation of the underground gas storage tank under the action of an earthquake can be obtained, thereby providing key data for evaluating its seismic performance; visualization makes the results more intuitive and easy to understand, thereby facilitating decision makers and engineers to quickly understand the problem; verification of historical data ensures the accuracy and reliability of the simulation results, and optimization and adjustment further improves the accuracy of the simulation.

[0083] In summary, this embodiment makes the simulation closer to the real situation, provides strong data support for the seismic design and safety assessment of underground gas storage tanks; helps to discover potential structural weaknesses and provide guidance for improving the design and strengthening structural safety; improves the scientific nature and efficiency of decision-making, and provides a strong guarantee for the safe operation of underground gas storage tanks.

[0084] Furthermore, if Figure 5 As shown, the process of establishing a simulated earthquake database in step S21 specifically includes the following steps:

[0085] Step S211: collecting data of different magnitude scales such as body wave magnitude, surface wave magnitude and moment magnitude of historical earthquakes, and performing pre-processing such as scanning, image processing and format conversion on the historical earthquake data;

[0086] Step S212: compile a unified earthquake catalog, including information such as the magnitude and depth of earthquake events, remove foreshocks and aftershocks, and retain only the main shock event; divide the earthquake magnitude into different intervals, and convert different magnitudes into moment magnitudes;

[0087] Step S213: Create a distributed database and partition table, and import the processed earthquake data; set up a simulated earthquake database of different magnitudes according to the divided intervals, including uncertainty parameters such as focal depth, inclination and radiation coefficient.

[0088] Preferably, this embodiment collects and pre-processes various magnitude scale data of historical earthquakes, and makes the data more standardized and easier to process through scanning, image processing and format conversion; compiles a unified earthquake catalog, removes foreshocks and aftershocks, retains only mainshock events, and uniformly converts earthquake magnitudes into moment magnitudes to facilitate analysis of earthquake data; creates a distributed database and partition table to effectively manage processed earthquake data, sets up a simulated earthquake database, and comprehensively considers uncertainty parameters such as focal depth, inclination and radiation coefficient.

[0089] In summary, this embodiment provides a reliable data basis for the analysis and research of the impact of earthquakes on gas storage tanks, ensures the accuracy and consistency of the data, and helps to improve the accuracy and reliability of the simulation of the effect of earthquakes on underground gas storage tanks; by unifying the earthquake catalog and magnitude conversion, it simplifies the complexity of earthquake data, making the comparison and analysis of earthquake events more intuitive and accurate, and helping to reveal the laws and characteristics of earthquake activities; improves the management efficiency and utilization rate of earthquake data, making the storage, query and analysis of earthquake data more efficient; the establishment of a simulated earthquake database is conducive to earthquake disaster risk assessment and the formulation of emergency plans, and improves the efficiency and accuracy of earthquake response.

[0090] Furthermore, if Figure 6As shown, the process of analyzing the underground gas storage tank under earthquake action in step S22 specifically includes the following steps:

[0091] Step S221: According to historical earthquake records, different intervals of earthquake magnitude in the compiled earthquake catalog are used as input loads in turn, and they are applied to the bottom of the gas tank model to simulate the effects of earthquakes of different magnitudes on the underground gas tank;

[0092] Step S222: using modal analysis to extract the natural frequency and vibration mode of the gas storage tank, evaluating the strain and deformation response of the gas storage tank under earthquakes of different magnitudes, and performing time history analysis to obtain the detailed stress and deformation response of the gas storage tank;

[0093] Step S223: analyzing the changes in the hoop stress, axial stress, and radial stress on the gas storage tank, and drawing a stress distribution diagram and a deformation diagram of the gas storage tank according to the stress distribution and deformation degree on the gas storage tank obtained by simulation.

[0094] Preferably, this embodiment can comprehensively evaluate the seismic performance of the gas tank under different magnitudes by simulating the effects of earthquakes of different magnitudes; by taking the seismic load as input, the dynamic impact of the earthquake on the gas tank can be accurately simulated; modal analysis helps to understand the inherent vibration characteristics of the gas tank, and time history analysis can accurately simulate the dynamic response of the gas tank under the action of the earthquake, including strain, deformation, stress and vibration; by analyzing the stress changes of the gas tank in different directions in detail and drawing intuitive stress distribution diagrams and deformation diagrams, the stress state and deformation of the gas tank under the action of the earthquake can be clearly understood.

[0095] In summary, this embodiment provides a scientific basis for the seismic design and safety assessment of gas storage tanks, helps to discover potential structural weaknesses, and provides guidance for improving the design; provides detailed data support for the seismic performance assessment of gas storage tanks, helps to discover potential problems of the structure under earthquake action, and provides guidance for structural improvement and optimization; provides intuitive visual support for the safety assessment of gas storage tanks, helps engineers quickly identify and solve potential structural problems, and also provides guidance for the maintenance and care of gas storage tanks.

[0096] Furthermore, the process of drawing the stress distribution diagram and the deformation diagram of the gas storage tank in step S223 specifically includes the following steps:

[0097] Step S2231: extracting stress values ​​and deformation amounts of various parts of the gas storage tank from the stress distribution and deformation degree on the gas storage tank obtained by simulation; cleaning and normalizing the extracted data to remove abnormal values ​​and noise;

[0098] Step S2232: Determine drawing parameters according to the geometric structure of the gas tank and the simulation results; select a color mapping scheme according to the distribution range of the stress value; set a legend to clarify the stress value range corresponding to each color; set coordinate axes and grids according to the geometric shape of the gas tank; map the normalized stress data to the geometric model of the gas tank to generate a stress distribution cloud map; import the three-dimensional geometric model of the gas tank into the drawing software, correspond the normalized stress data to each node or unit in the geometric model, and use the color mapping scheme to visualize the stress value; generate a stress distribution cloud map through the drawing function;

[0099] Step S2233: Process the deformation data and calculate the deformation of each part of the gas tank; calculate the deformation of each part of the gas tank according to the simulation results, including displacement, strain, etc.; map the deformation data to the geometric model of the gas tank, generate a deformation cloud map, and show the deformation of the gas tank under different earthquake magnitudes; correspond the normalized deformation data to each node or unit in the geometric model, and use a color mapping scheme to visualize the deformation; generate a deformation cloud map through the drawing function.

[0100] Preferably, in step S2231 of this embodiment, data extraction and preprocessing are performed to accurately extract stress and deformation data of various parts of the gas tank from the simulation results to ensure the integrity and accuracy of the data; outliers and noise are removed to ensure the reliability of the data, and the data are made comparable through normalization processing to facilitate subsequent analysis and visualization. The significance achieved: ensuring that the basic data for analysis is reliable and avoiding erroneous conclusions caused by data problems; normalization processing allows data from different parts to be compared at the same scale, which is convenient for a comprehensive evaluation of the performance of the gas tank. Step S2232 is the generation of stress distribution diagrams. According to the geometric structure of the gas tank and the simulation results, the drawing parameters are reasonably set to ensure the accuracy and readability of the graphics; a suitable color mapping scheme is selected so that the distribution of stress values ​​can be intuitively displayed through color changes; the normalized stress data is mapped to the geometric model of the gas tank to generate a stress distribution cloud map to intuitively display the stress distribution of various parts of the gas tank. Significance achieved: Through the stress distribution cloud map, engineers can intuitively see the stress concentration areas in various parts of the gas tank, which is convenient for identifying potential structural weaknesses; it provides an intuitive reference for the design and optimization of the gas tank, helping engineers to consider the impact of stress distribution in the design stage, thereby improving the safety and reliability of the gas tank. Step S2233: Generation of deformation map, calculating the deformation variables of various parts of the gas tank, including displacement, strain, etc., to ensure the accuracy of the deformation data; mapping the deformation data to the geometric model of the gas tank, generating a deformation cloud map, and intuitively showing the deformation of the gas tank under different earthquake magnitudes. Significance achieved: Through the deformation cloud map, engineers can intuitively see the deformation of the gas tank under different conditions and evaluate its seismic performance and structural stability; according to the deformation analysis results, preventive measures can be taken in advance to avoid structural damage or safety accidents caused by excessive deformation.

[0101] In summary, this embodiment can not only fully understand the stress and deformation of the gas tank, but also provide a scientific basis for the design, optimization and maintenance of the gas tank, ensuring the safety and reliability of the gas tank under various working conditions. It not only improves the efficiency of engineering design, but also greatly enhances the practicality and safety of the gas tank.

[0102] Furthermore, if Figure 7 As shown, the process of obtaining the potential problems of the underground gas storage tank structure in step S3 specifically includes the following steps:

[0103] Step S31: receiving stress distribution map and deformation map data from the simulation model and real-time sensor, extracting key features in the image, such as stress concentration area and deformation mode; comparing the similarities and differences between the simulation data and the real-time data; outputting the comparison results, including similarity scores, difference area markings, and potential problem identification;

[0104] Step S32: Use a convolutional neural network to extract key features in the image, generate a feature vector, and perform dimensionality reduction processing on the feature vector; identify and match key points in the simulation and real-time data, and calculate the similarity scores of the two sets of data; and intuitively display the differences between the simulation and real-time data by marking the difference areas;

[0105] Here is an example of an equation:

[0106]

[0107] In the formula, S(D s ,D r ) represents the simulation data D s and real-time data r The similarity score between s represents the simulation data set, represents the stress distribution map and deformation map data generated by the simulation model, and D r represents the real-time data set, which represents the stress distribution map and deformation map data collected by the real-time sensor, N represents the total number of key points in the data set, and D s,i represents the eigenvalue of the i-th key point in the simulation data set, D r,i represents the characteristic value of the i-th key point in the real-time data set, min(D s,i ,D r,i ) represents the minimum value of the eigenvalue of the ith key point in the simulation data and the real-time data, max(D s,i ,D r,i ) represents the maximum value of the eigenvalue of the i-th key point in the simulation data and the real-time data;

[0108] Step S33: using an autoencoder to identify stress concentration areas and deformation anomalies, classify abnormal areas, and mark potential problem areas;

[0109] Among them, the expressions for identifying stress concentration areas and deformation anomalies are:

[0110]

[0111] In the formula, E(D r ) indicates real-time data D r The abnormal score indicates the stress concentration area and the degree of abnormal deformation, D r represents the real-time data set, which represents the stress distribution map and deformation map data collected by the real-time sensor, N represents the total number of key points in the data set, and D r,i represents the eigenvalue of the i-th key point in the real-time data set, μ represents the mean of the eigenvalues ​​of all key points in the real-time data set, σ represents the standard deviation of the eigenvalues ​​of all key points in the real-time data set, |D r,i-μ| represents the absolute difference between the eigenvalue and the mean of the i-th key point in the real-time data set, β represents the weight coefficient, which is used to adjust the influence of the second-order derivative term. The second-order derivative of the eigenvalue of the i-th key point in the real-time data set represents the curvature change of the point; Indicates the degree of deviation between the feature value of the i-th key point and the mean. The greater the deviation, the higher the anomaly score; Represents the curvature change of the i-th key point. The greater the curvature change, the higher the anomaly score. The weight coefficient β is used to adjust the influence of the second-order derivative term. It can more accurately quantify anomalies in real-time data, thereby identifying stress concentration areas and deformation anomalies. Areas with higher anomaly scores usually indicate potential problem areas that require further analysis and processing.

[0112] Preferably, the data reception and preliminary comparison in step S31 of this embodiment can simultaneously receive stress distribution diagrams and deformation diagram data from the simulation model and real-time sensors to ensure the comprehensiveness and real-time nature of the data; extract key features in the image, such as stress concentration areas and deformation patterns, through image processing technology to provide basic data for subsequent analysis; compare the similarities and differences between simulation data and real-time data, and output preliminary comparison results, including similarity scores, difference area markings, and potential problem identification. Significance achieved: Ensure that the system can process simulation and real-time data simultaneously and provide comprehensive data support; through real-time data reception and preliminary comparison, the system can respond quickly and discover potential problems in a timely manner; the extracted key features provide a solid foundation for subsequent in-depth analysis, ensuring the accuracy and reliability of the analysis. Step S32: Feature extraction and depth comparison. CNN is used to extract key features in the image, generate feature vectors, and improve the accuracy and efficiency of feature extraction. Feature vectors are processed with dimensionality reduction to reduce computational complexity and improve the operating efficiency of the system. Key points in simulation and real-time data are identified and matched to ensure the accuracy of comparison. Similarity scores of two sets of data are calculated, such as Euclidean distance and cosine similarity, to quantify the similarity and difference of data. The difference between simulation and real-time data is intuitively displayed through difference area marking, which is convenient for users to understand and analyze. Significance achieved: The feature vector extracted by CNN ensures the accuracy of feature extraction and improves the accuracy of comparative analysis. Dimensionality reduction reduces computational complexity, improves the operating efficiency of the system, and ensures that the system can quickly process large amounts of data. Through difference area marking, users can intuitively see the difference between simulation and real-time data, which is convenient for quickly locating problems. Similarity scores provide quantitative analysis results, which is convenient for users to conduct quantitative analysis and decision-making. Step S33: Anomaly detection and problem identification. Autoencoders are used to identify stress concentration areas and deformation anomalies to improve the accuracy of anomaly detection. Abnormal areas are classified and potential problem areas are marked, which is convenient for users to quickly locate and process. Significance achieved: The autoencoder can accurately identify stress concentration areas and deformation anomalies, improving the accuracy of problem identification; through abnormal classification and marking, users can quickly locate potential problem areas and take timely measures; by identifying potential problems in advance, the system can help users perform preventive maintenance and reduce the risk of accidents.

[0113] In summary, this embodiment can comprehensively, accurately and efficiently identify potential problems of underground gas storage tank structures, and display the results in an intuitive and quantitative manner, helping users to quickly locate and handle problems and improve the safety and reliability of the system. Each step together constitutes a complete problem identification and analysis process.

[0114] like Figure 8As shown, this embodiment provides an embodiment of a sandwich steel lining type underground high-pressure gas storage tank device. In this embodiment, the sandwich steel lining type underground high-pressure gas storage tank device includes a gas storage cavity 1, a composite lining structure 2, a drainage hole 3, an anchor rod 4, an air inlet / outlet (pipe) 5, a traffic / maintenance passage 6 and surrounding rock 7;

[0115] Among them, the outer side of the gas storage cavity 1 is wrapped by a composite lining structure 2, there are multiple drainage holes 3 around the gas storage cavity 1, and anchor rods 4 are fixed in the intervals between the drainage holes 3, and an inlet / outlet (pipe) 5 is arranged at the top of the gas storage cavity 1, and the inlet / outlet (pipe) 5 is connected to the outside through a traffic / maintenance channel 6; the entire gas storage tank device is surrounded by surrounding rocks 7.

[0116] Preferably, the sandwich steel-lined underground high-pressure gas storage tank proposed in this embodiment, the main structure of which is, from the inside to the outside, a gas storage cavity 1, a concrete lining inner shell, a steel lining "sandwich" sealing layer, a concrete lining outer shell (including a drainage and pressure relief system), a backfill concrete layer, and a support system layer (anchor rods 4, steel bars and shotcrete, etc.).

[0117] In summary, this embodiment effectively utilizes the bearing capacity of the surrounding rock 7 by closely combining the "sandwich" steel lining with the concrete lining inner shell and outer shell, so that the device can withstand high internal pressure while maintaining stability, reducing the amount of steel lining and reducing the project cost; the concrete lining inner shell provides the steel lining with an internal support function when resisting external pressure, enhancing the stability of the entire gas tank structure, so that the gas tank can better adapt to the underground environment and reduce the structural deformation caused by external pressure changes; the reagent of the "sandwich" sealing layer of the steel lining can effectively prevent gas leakage and improve the sealing performance of the gas tank; the inlet / outlet (pipe) is connected to the outside through the traffic / maintenance channel, making the maintenance and inspection of the gas tank more convenient, improving the reliability and service life of the gas tank, and reducing the failure and downtime caused by improper maintenance; by reducing the amount of materials and reducing the project cost, it is helpful to achieve the goals of environmental protection and sustainability; at the same time, through the design of the drainage hole 3 and the drainage and decompression system, it is possible to effectively prevent the erosion and damage of the gas tank by groundwater and protect groundwater resources.

[0118] Furthermore, if Fig. 9 As shown, in the sandwich steel-lined underground high-pressure gas storage tank device of this embodiment, the composite lining structure includes: a gas storage cavity 1, a drainage hole 3, an anchor rod 4 (connected to the steel lining), surrounding rock 7, a concrete inner shell 8, a steel lining (sealing layer) 9, a concrete lining outer shell 10, a drainage pipe (connected to the drainage hole 3) 11, backfill concrete 12 and shotcrete 13;

[0119] Among them, from the inside to the outside of the gas storage cavity 1 are the concrete inner shell 8, the steel lining (sealing layer) 9, the concrete lined outer shell 10, the drainage pipe 11, the backfill concrete 12, the shotcrete 13 and the outermost wrapped surrounding rock 7; the drainage hole 3 is connected to the drainage pipe 11, and the anchor rod 4 is connected to the steel lining (sealing layer) 9.

[0120] Preferably, the steel lining of this embodiment adopts a "sandwich" type, which is in close contact with the concrete inner shell 8 and the concrete lining outer shell 10, which can not only meet the sealing function, but also transmit the high internal pressure load to the external surrounding rock 7, making full use of the bearing capacity of the surrounding rock 7. At the same time, the concrete inner shell 8 can provide the steel lining with internal support when resisting external pressure, which can greatly reduce the amount of steel lining 9, and the thickness can be reduced to about half of the steel plate lining sealing form, while meeting the goals of withstanding high internal pressure, resisting external pressure stably and reducing engineering costs.

[0121] In summary, the present embodiment adopts a composite lining structure 2, especially a "sandwich" steel lining design, so that the device can efficiently store high-pressure gas; the steel lining 9 serves as a sealing layer to ensure the tightness of the gas storage cavity 1 and prevent gas leakage, thereby improving the safety and efficiency of gas storage; the "sandwich" steel lining is in close contact with the concrete inner shell 8 and the outer shell, and can effectively transfer the high internal pressure load to the external surrounding rock 7; the bearing capacity of the surrounding rock 7 is fully utilized, the burden of the gas storage tank itself is reduced, and the stability and safety of the overall structure are improved; the concrete inner shell 8 provides the steel lining with an internal support function when resisting external pressure, which can greatly reduce the amount of steel lining 9; the combined use of the concrete inner shell 8 and the outer shell not only provides additional support for the steel lining 9, but also enhances the stability of the entire structure against external pressure; the design of the drainage hole 3 and the drainage pipe 11 helps to remove the accumulated water inside the gas storage tank and keep the internal environment dry and clean; by rationally utilizing the bearing capacity of the surrounding rock 7 and reducing the amount of materials used, the project cost is reduced, and the consumption of natural resources and damage to the environment are reduced.

[0122] like Fig.10 As shown, this embodiment provides an embodiment of an electronic device. In this embodiment, the electronic device 14 includes a processor 141 and a memory 142 coupled to the processor 141 .

[0123] The memory 142 stores program instructions for implementing the performance simulation analysis method of the sandwich steel-lined underground high-pressure gas storage tank according to any of the above-mentioned embodiments.

[0124] The processor 141 is used to execute the program instructions stored in the memory 142 to perform the layout of the performance simulation analysis method of the sandwich steel-lined underground high-pressure gas storage tank.

[0125] The processor 141 may also be referred to as a CPU (Central Processing Unit). The processor 141 may be an integrated circuit chip having signal processing capabilities. The processor 141 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0126] Further, Fig.11 The schematic diagram of the structure of the storage medium of an embodiment of the present application is that the storage medium 15 of the embodiment of the present application stores program instructions 151 that can implement all the above methods, wherein the program instructions 151 can be stored in the above storage medium in the form of a software product, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or terminal devices such as a computer, a server, a mobile phone, and a tablet.

[0127] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0128] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units. The above is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

[0129] The specific implementation methods of the invention are described in detail above, but they are only examples, and the invention is not limited to the specific implementation methods described above. For those skilled in the art, any equivalent modification or substitution of the invention is also within the scope of the invention, therefore, the equalization, modification, improvement, etc. made without departing from the spirit and principle of the invention should be included in the scope of the invention.

Claims

1. A performance simulation analysis method for a sandwich steel-lined underground high-pressure gas storage tank, characterized in that: The sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method comprises: Collect the real-time parameters of the gas tank pressure, temperature and deformation and pre-process them; input the pre-processed gas tank structure data into the simulation equipment, create a three-dimensional geometric model of the gas tank, and discretize the three-dimensional geometric model of the gas tank into a finite element network; According to the data of different magnitudes of historical earthquakes, a simulated earthquake database of different magnitudes is established, and the database is added to the simulation database to simulate the effects of earthquakes of different magnitudes on the gas storage tank, and the stress distribution diagram and deformation diagram of the gas storage tank are obtained; The stress distribution map and deformation map data obtained by simulation are compared with the stress distribution map and deformation map data generated by the collected real-time parameters of the gas tank to obtain the potential problems of the underground gas tank structure, and the gas tank structure is adjusted according to the potential problems of the structure.

2. The performance simulation analysis method of the sandwich steel-lined underground high-pressure gas storage tank according to claim 1 is characterized in that: The process of creating a 3D geometric model of a gas tank includes: The preprocessed gas tank parameters are screened to obtain basic geometric element parameters of the gas tank; multiple point coordinate pairs are defined for the basic geometric elements, and the boundaries of the model are formed by connecting the coordinates; Use the boundary blending function to connect different surfaces to make a smooth transition at the boundary, refine the surface, and generate a smoother surface by adding new coordinates at each point coordinate and calculating its position; The 3D geometric model of the gas tank is optimized and rendered, and texture and material attribute parameters are added. After the settings are completed, it is input into the simulation device.

3. The performance simulation analysis method of the sandwich steel-lined underground high-pressure gas storage tank according to claim 1 is characterized in that: The process of discretizing the 3D geometric model of the gas tank into a finite element network includes: Determine the type, real constants, material properties and coordinate system of the underground gas storage tank, set the fine grid density in the area where the material properties change, generate the grid according to the unit properties, check the grid after generation, and merge the generated grid with other parts of the model; According to the construction material properties of the underground gas storage tank, determine the Young's modulus, Poisson's ratio and density material parameters of each small unit; according to the construction environment of the underground gas storage tank, define the boundary conditions such as fixed support and displacement constraints of the model and the applied gravity, pressure and temperature loads; The local equations of all small units are combined into an overall set of equations, and the equations are solved to obtain the response of the model. After the solution is completed, the corresponding stress distribution diagram and deformation diagram are drawn for the results.

4. The performance simulation analysis method of a sandwich steel-lined underground high-pressure gas storage tank according to claim 1 is characterized in that: The process of simulating the effects of an earthquake on a gas storage tank includes: Collect earthquake records and related parameters of different magnitudes in historical earthquake data, and organize earthquake waveform data; generate corresponding seismic motion records according to different magnitudes, organize the generated seismic motion records into a database, and apply the seismic motion records to the model; Simulate the dynamic response of underground gas storage tanks under earthquake action, analyze the stress distribution and deformation of underground gas storage tanks under earthquake action, and obtain their hoop stress and vertical stress parameters; according to the obtained parameters, obtain the stress distribution diagram and deformation diagram of underground gas storage tanks; The obtained stress distribution diagram and deformation diagram of the underground gas storage tank are displayed on the visualization device; the calculation results are verified according to historical data and optimized and adjusted according to the verification results.

5. The performance simulation analysis method of the sandwich steel-lined underground high-pressure gas storage tank according to claim 4 is characterized in that: The process of establishing a simulated earthquake database includes: Collect data of different magnitude scales of body wave magnitude, surface wave magnitude and moment magnitude of historical earthquakes, and perform scanning, image processing and format conversion preprocessing on historical earthquake data; Compile a unified earthquake catalog containing the magnitude and depth information of earthquake events, remove foreshocks and aftershocks, and keep only the main shock events; divide the earthquake magnitude into different intervals and convert different magnitudes into moment magnitudes; Create a distributed database and partition table, and import the processed earthquake data; set up a simulated earthquake database of different magnitudes according to the divided intervals, including the uncertainty parameters of focal depth, inclination and radiation coefficient.

6. The performance simulation analysis method of a sandwich steel-lined underground high-pressure gas storage tank according to claim 4 is characterized in that: The process of analyzing underground gas storage tanks under seismic action includes: According to historical earthquake records, different intervals of earthquake magnitude in the compiled earthquake catalog are used as input loads in turn and applied to the bottom of the gas tank model to simulate the effects of earthquakes of different magnitudes on the underground gas tank; Use modal analysis to extract the natural frequency and vibration mode of the gas tank, evaluate the strain and deformation response of the gas tank under earthquakes of different magnitudes, and perform time history analysis to obtain the detailed stress and deformation response of the gas tank; The changes in the hoop stress, axial stress and radial stress on the gas tank are analyzed, and the stress distribution diagram and deformation diagram of the gas tank are drawn according to the stress distribution and deformation degree on the gas tank obtained by simulation.

7. The performance simulation analysis method of the sandwich steel-lined underground high-pressure gas storage tank according to claim 6 is characterized in that: The process of drawing the stress distribution diagram and deformation diagram of the gas tank includes: Extract the stress value and deformation amount of each part of the gas tank from the stress distribution and deformation degree of the gas tank obtained by simulation; clean and normalize the extracted data to remove abnormal values ​​and noise; Determine the drawing parameters according to the geometric structure and simulation results of the gas tank; select the color mapping scheme according to the distribution range of the stress value; set the legend to clarify the stress value range corresponding to each color; set the coordinate axis and grid according to the geometric shape of the gas tank; map the normalized stress data to the geometric model of the gas tank to generate a stress distribution cloud map; import the three-dimensional geometric model of the gas tank into the drawing software, correspond the normalized stress data to each node or unit in the geometric model, and use the color mapping scheme to visualize the stress value; generate a stress distribution cloud map through the drawing function; The deformation data is processed to calculate the deformation of each part of the gas tank; based on the simulation results, the deformation of each part of the gas tank is calculated, including displacement and strain; the deformation data is mapped to the geometric model of the gas tank to generate a deformation cloud map to show the deformation of the gas tank under different earthquake magnitudes; the normalized deformation data is matched with each node or unit in the geometric model, and the deformation is visualized using a color mapping scheme; the deformation cloud map is generated through the drawing function.

8. The performance simulation analysis method of a sandwich steel-lined underground high-pressure gas storage tank according to claim 1 is characterized in that: The process of identifying potential problems with underground gas tank structures includes: Receive stress distribution and deformation map data from simulation models and real-time sensors, extract key features, stress concentration areas and deformation patterns in the images; compare the similarities and differences between simulation data and real-time data; output comparison results, including similarity scores, difference area markings and potential problem identification; Use convolutional neural networks to extract key features in images, generate feature vectors, and perform dimensionality reduction on feature vectors; identify and match key points in simulation and real-time data, and calculate similarity scores between the two sets of data; and intuitively display the differences between simulation and real-time data by marking different areas; An autoencoder is used to identify stress concentration areas and deformation anomalies, classify abnormal areas, and mark potential problem areas.

9. A sandwich steel-lined underground high-pressure gas storage tank device, which is applied to the sandwich steel-lined underground high-pressure gas storage tank performance simulation analysis method as claimed in any one of claims 1 to 8, characterized in that: The sandwich steel-lined underground high-pressure gas storage tank device is provided with a gas storage cavity; the outer side of the gas storage cavity is wrapped by a composite lining structure, a plurality of drainage holes are arranged around the gas storage cavity, anchor rods are fixed in intervals between the drainage holes, an air inlet / outlet is arranged at the top of the gas storage cavity, and the air inlet / outlet is connected to the outside through a traffic / maintenance passage; the entire gas storage tank device is surrounded by surrounding rocks.

10. The sandwich steel-lined underground high-pressure gas storage tank device according to claim 9, characterized in that: The composite lining structure includes: gas storage cavity, drainage holes, anchor rods, surrounding rock, concrete inner shell, steel lining, concrete lining outer shell, drainage pipe, backfill concrete and shotcrete; Among them, from the inside to the outside of the gas storage cavity are the concrete inner shell, steel lining, concrete lining outer shell, drainage pipe, backfill concrete, shotcrete and the outermost layer of surrounding rock; the drainage hole is connected to the drainage pipe, and the anchor rod is connected to the steel lining.

Images