Cladding tube burst simulation method, apparatus, device, storage medium and product

Abstract

The application relates to a cladding tube explosion simulation method, device, equipment, storage medium and product. The method comprises the following steps: acquiring a pressure boosting explosion experiment parameter of a cladding tube; applying a pressure load to a virtual model corresponding to the cladding tube according to the pressure boosting explosion experiment parameter, performing a cladding tube explosion simulation experiment, generating a pressure boosting explosion simulation parameter, and analyzing the pressure boosting explosion simulation parameter to generate a pressure boosting explosion simulation result. The scheme replaces the real pressure boosting explosion experiment with a virtual experiment method, simulates various working conditions of the real pressure boosting explosion experiment through corresponding various pressure boosting explosion experiment parameters, avoids waste of the cladding tube material caused by a large number of experiments in the real pressure boosting explosion experiment, reduces the cost of the pressure boosting explosion experiment, and improves the economy of the pressure boosting explosion experiment.

Description

Technical Field

[0001] This application relates to the field of nuclear reactor fuel rod cladding experimental technology, and in particular to a method, apparatus, equipment, storage medium and product for simulating cladding tube explosion. Background Technology

[0002] With the development of nuclear reactor fuel rod cladding experimental technology, rapid pressurization and detonation tests are generally used to simulate reactive accidents. These tests examine the impact of different pressurization rates on the pressure-bearing capacity of candidate cladding materials under specific high-temperature conditions, thereby screening for cladding materials with potential applications and providing valuable reference for predicting their subsequent thermodynamic behavior upon reactor insertion. Rapid pressurization and detonation tests are typically conducted in a high-temperature furnace. The test sample is placed in the homogenization zone of the furnace, sealed at one end, and connected to a pressurization device at the other. Once the furnace temperature reaches the preset level, the pressurization device is pre-pressurized. Ensuring uniform temperature across the entire sample, the pressure relief valve is opened, resulting in a rapid pressurization and detonation test, ultimately yielding the pressure-time curve. After the test, other cladding parameters, such as elongation, can be measured to characterize the cladding toughness.

[0003] In traditional techniques, burst tests on cladding tubes require different combinations of temperatures and pressurization rates for tubes made of different materials. This results in numerous testing conditions for different cladding tube materials. Consequently, a large number of cladding tubes are needed for burst tests, and each tube is damaged after each test and cannot be reused, leading to a significant waste of resources. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for simulating the bursting of a casing tube, which can improve the economic efficiency of real-world pressure-boosting bursting tests, in response to the aforementioned technical problems.

[0005] Firstly, this application provides a method for simulating the bursting of a clad tube. The method includes:

[0006] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0007] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting experimental parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0008] The simulation parameters for the pressure boosting blast are analyzed to generate simulation results for the pressure boosting blast.

[0009] In one embodiment, the virtual model includes a finite element model; the method further includes:

[0010] Obtain the geometric and material parameters of the cladding tube;

[0011] Based on the geometric and material parameters of the cladding tube, a geometric model of the cladding tube is established.

[0012] The geometric model of the cladding tube is meshed using the finite element method to obtain a meshed finite element model, which is then used as the virtual model corresponding to the cladding tube.

[0013] In one embodiment, the parameters for the pressurization explosion test include the test temperature, the pressurization rate, and preset constraints; the preset constraints include the maximum deformation of the inner and outer walls of the casing tube and the maximum pressure load on the inner wall of the casing tube.

[0014] The step of applying a pressure load to the virtual model corresponding to the cladding tube according to the pressure-boosting explosion experimental parameters, conducting a cladding tube explosion simulation experiment, and generating pressure-boosting explosion simulation parameters includes:

[0015] At the experimental temperature, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate the pressure-boosting explosion simulation parameters of the cladding tube under the preset pressure load; the pressure-boosting explosion simulation parameters include the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress value of each grid of the cladding tube;

[0016] If the deformation of the inner wall and the outer wall of the cladding tube are less than the maximum deformation and the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, the stress value of each grid of the cladding tube is used to determine whether the cladding tube has fractured.

[0017] If not, the preset pressure load is adjusted according to the pressurization rate to obtain the adjusted preset pressure load. The adjusted preset pressure load is then used as the new preset pressure load. The steps of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating the pressurization explosion simulation parameters of the cladding tube under the preset pressure load are executed cyclically until the stress value of each grid of the cladding tube in the pressurization explosion simulation parameters determines that the cladding tube has fractured. Then, the pressurization explosion simulation parameters of the cladding tube under multiple preset pressure loads are output.

[0018] In one embodiment, determining whether the cladding tube has fractured based on the stress values ​​of each grid of the cladding tube includes:

[0019] Determine whether the cladding tube has yielded based on the stress values ​​of each grid in the cladding tube;

[0020] If not, calculate the first deformation of the inner wall of the cladding tube and the first deformation of the outer wall; the first deformation includes elastic deformation.

[0021] If so, calculate the second deformation of the inner wall and the second deformation of the outer wall of the casing tube, and determine whether the casing tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0022] In one embodiment, the preset constraint condition further includes the yield point of the cladding tube; determining whether the cladding tube has yielded based on the stress values ​​of each grid of the cladding tube includes:

[0023] Compare the stress values ​​of each grid in the cladding tube with the yield point of the cladding tube;

[0024] Based on the aforementioned size relationship, it is determined whether the cladding tube has undergone yielding.

[0025] In one embodiment, the pressure-boosting explosion simulation results include the pressure withstand time and cross-sectional elongation of the cladding tube; the analysis of the pressure-boosting explosion simulation parameters to generate the pressure-boosting explosion simulation results includes:

[0026] Based on the deformation of the outer wall of the cladding tube under multiple preset pressure loads, calculate a first correspondence between the multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads;

[0027] Obtain the application time of multiple preset pressure loads, and calculate a second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads;

[0028] Based on the first correspondence and the second correspondence, the pressure resistance time and cross-sectional elongation of the cladding tube are calculated.

[0029] Secondly, this application also provides a device for simulating the blasting of a cladding tube. The device includes:

[0030] The acquisition module acquires the parameters for the pressure boosting and bursting test of the cladding tube;

[0031] The analysis module applies a pressure load to the virtual model corresponding to the cladding tube according to the pressure boosting explosion test parameters, conducts a cladding tube explosion simulation experiment, and generates pressure boosting explosion simulation parameters.

[0032] The output module analyzes the pressure boosting blasting simulation parameters and generates pressure boosting blasting simulation results.

[0033] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0034] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0035] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting experimental parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0036] The simulation parameters for the pressure boosting blast are analyzed to generate simulation results for the pressure boosting blast.

[0037] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0038] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0039] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting experimental parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0040] The simulation parameters for the pressure boosting blast are analyzed to generate simulation results for the pressure boosting blast.

[0041] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0042] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0043] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting experimental parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0044] The simulation parameters for the pressure boosting blast are analyzed to generate simulation results for the pressure boosting blast.

[0045] The aforementioned method, apparatus, equipment, storage medium, and product for simulating the bursting of cladding tubes obtain the experimental parameters for the pressure-boosting bursting of the cladding tubes. Based on these parameters, a finite element model of the cladding tube is established. A pressure load is applied to the finite element model to simulate the pressure-boosting bursting experiment, generating simulation results to characterize the toughness of the cladding tube. Traditional pressure-boosting bursting tests require different combinations of temperatures and pressure-boosting rates for cladding tubes made of different materials, resulting in numerous required operating conditions. Consequently, the bursting test requires a large number of cladding tubes, which are damaged after each test and cannot be reused, leading to a significant waste of resources. This scheme first obtains the pressure-boosting burst test parameters of the selected cladding material, and then simulates a working condition in a real pressure-boosting burst test using these parameters. A burst simulation experiment is then conducted on a virtual model of the selected cladding material to generate burst simulation parameters. These parameters are then analyzed and processed to produce pressure-boosting burst simulation results, which can be used to characterize the selected cladding material's resistance to high temperature and pressure. This scheme replaces the real pressure-boosting burst test with a virtual experiment method, simulating various working conditions of the real test using corresponding pressure-boosting burst test parameters. This avoids the waste of cladding material from numerous real pressure-boosting burst tests, reduces the cost of pressure-boosting burst tests, and improves their economic efficiency. Attached Figure Description

[0046] Figure 1 This is a diagram illustrating the application environment of the casing tube blasting simulation method in one embodiment;

[0047] Figure 2 This is a flowchart illustrating a method for simulating the bursting of a casing tube in one embodiment;

[0048] Figure 3 This is a flowchart illustrating the casing tube rupture simulation method in another embodiment;

[0049] Figure 4 This is a schematic diagram of finite element mesh generation for the cascade explosion simulation method in another embodiment;

[0050] Figure 5 This is a flowchart illustrating the casing tube rupture simulation method in another embodiment;

[0051] Figure 6 This is a flowchart illustrating the casing tube rupture simulation method in another embodiment;

[0052] Figure 7 This is a flowchart illustrating the casing tube rupture simulation method in another embodiment;

[0053] Figure 8This is a schematic diagram of the deformation-time curve of the cladding tube blasting simulation method in another embodiment;

[0054] Figure 9 This is a schematic diagram of the equivalent stress contour plot of the cladding tube blasting simulation method in another embodiment;

[0055] Figure 10 This is a flowchart illustrating the casing tube rupture simulation method in another embodiment;

[0056] Figure 11 This is a flowchart illustrating the casing tube rupture simulation method in another embodiment;

[0057] Figure 12 This is a structural block diagram of a casing tube blasting simulation device in one embodiment;

[0058] Figure 13 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0060] The cladding tube bursting simulation method provided in this application embodiment can be applied to, for example... Figure 1 In the application environment shown, the environment includes a computer device 120. The computer device 120 can acquire the pressure-boosting explosion test parameters of the cladding tube; apply pressure loads to the virtual model corresponding to the cladding tube based on the pressure-boosting explosion test parameters to conduct a cladding tube explosion simulation experiment, generating pressure-boosting explosion simulation parameters; and analyze the pressure-boosting explosion simulation parameters to generate pressure-boosting explosion simulation results. The computer device 120 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. The computer device 120 can also be implemented using a standalone server or a server cluster composed of multiple servers.

[0061] In one embodiment, such as Figure 2 As shown, a method for simulating the blasting of clad tubes is provided, which is then applied to... Figure 1 Taking a computer device as an example, the explanation includes the following steps:

[0062] S220, obtain the parameters for the pressure boosting and bursting test of the cladding tube.

[0063] One method is to simulate a reactive introduction accident in the cladding tubes using a pressure boosting burst test, thereby examining the pressure-bearing capacity of cladding tubes made of different materials. A reactive introduction accident occurs when a nuclear reactor accidentally introduces positive reactivity under various operating conditions, leading to a surge in reactor power, instantaneous pressurization inside the cladding tubes, and eventual rupture.

[0064] Cladding tubes are used in nuclear engineering. Nuclear reactors use fissile materials, which are then processed into metals, alloys, oxides, carbides, etc., to serve as reactor fuel. To prevent the leakage of these fission products, the fuel is typically encased in a cladding. The cladding tube contains these fission products, preventing direct contact and reaction between the fuel and the external coolant. Cladding tubes generally operate in high-temperature, high-pressure environments, constantly bearing increasing stress. This stress comes from both the pressure and thermal stress of the external coolant and the internal stress caused by fuel fission. Therefore, the requirements for cladding tube materials in nuclear engineering are extremely high.

[0065] Specifically, the pressure-boosting burst test parameters refer to the test parameters involved in the pressure-boosting burst test of the cladding tube. For example, the pressure-boosting burst test parameters include at least one of the following: temperature-related parameters, humidity-related parameters, and pressure-related parameters applied to the cladding tube, which are selected as needed for the simulation experiment. This application does not limit the parameters in this regard.

[0066] When conducting pressure-boosting explosion tests on cladding tubes, different cladding tubes made of different materials need to be tested under different pressure-boosting explosion test parameters. Each cladding tube made of different materials corresponds to a specific test condition under different pressure-boosting explosion test parameters. Therefore, when conducting pressure-boosting explosion tests on cladding tubes, there are many test conditions required for cladding tubes made of different materials.

[0067] To simulate the pressure-boosting burst test of cladding tubes made of different materials under different experimental conditions, it is necessary to obtain the pressure-boosting burst test parameters of the cladding tubes under different experimental conditions. Specifically, the pressure-boosting burst test parameters of the cladding tubes in the simulated pressure-boosting burst test can be set based on the pressure-boosting burst test parameters from actual pressure-boosting burst tests on the cladding tubes.

[0068] S240: Apply pressure load to the virtual model corresponding to the cladding tube according to the pressure boosting blasting test parameters, conduct a cladding tube blasting simulation test, and generate pressure boosting blasting simulation parameters.

[0069] Specifically, the applied pressure load is set based on the different parameters of the pressure-boosting explosion test under the simulated experimental conditions. Furthermore, the service conditions and performance of the cladding material under test must be considered when setting the applied pressure load. For example, the pressure load applied to the virtual model corresponding to the cladding tube can be set based on at least one of the parameters involved in the pressure-boosting explosion test, such as temperature-related parameters, humidity-related parameters, irradiation-related parameters, and pressure-related parameters applied to the cladding tube.

[0070] The virtual model corresponding to the cladding tube can be a 3D virtual model established based on the shape parameters, material parameters, and performance parameters of the real cladding tube. For example, the shape parameters, material parameters, and performance parameters of the real cladding tube can be obtained, and then a 3D modeling method can be used to model the real cladding tube to generate a 3D virtual model corresponding to the real cladding tube. The 3D modeling method includes either the voxel method or the scanning method, and this application does not limit it.

[0071] After establishing a virtual model of the cladding tube, pressure loads can be applied to the virtual model according to the pressure-boosting explosion test parameters to conduct a cladding tube explosion simulation experiment. Since the virtual model of the cladding tube will undergo different deformations and generate different stresses under different pressure loads, different pressure loads can be applied to the virtual model according to the pressure-boosting explosion test parameters, thus realizing the explosion simulation experiment of the cladding tube. Furthermore, during the explosion simulation experiment, the cladding tube will generate pressure-boosting explosion simulation parameters corresponding to different pressure loads.

[0072] S260 analyzes the simulation parameters of the pressure boosting blast and generates simulation results of the pressure boosting blast.

[0073] Since the cladding tube will generate pressure-boosting explosion simulation parameters corresponding to different pressure loads under different pressure loads, it is possible to analyze the pressure-boosting explosion simulation parameters generated by the cladding tube under different pressure loads and generate pressure-boosting explosion simulation results.

[0074] Specifically, since the virtual model corresponding to the cladding tube undergoes different deformations under different pressure loads, and different stresses are generated within the virtual model, the obtained simulation parameters for the pressure-boosting explosion of the cladding tube under different pressure loads can include deformation parameters and stress parameters. Then, these deformation and stress parameters of the cladding tube model under different pressure loads are analyzed to generate the simulation results for the pressure-boosting explosion. At this point, the simulation results can represent the pressure-bearing capacity of the cladding tube model, etc.

[0075] In the aforementioned cladding tube blasting simulation method, the pressure-boosting blasting test parameters of the selected cladding tube material are first obtained. These parameters are then used to simulate a specific condition in a real pressure-boosting blasting test. A blasting simulation experiment is then conducted on a virtual model of the selected cladding tube to generate blasting simulation parameters. These parameters are then analyzed and processed to produce pressure-boosting blasting simulation results, which can be used to characterize the selected cladding tube material's resistance to high temperature and pressure. This approach replaces the real pressure-boosting blasting test with a virtual experiment method, simulating various conditions of the real test using corresponding pressure-boosting blasting test parameters. This avoids the waste of cladding tube material in numerous real pressure-boosting blasting tests, reducing the cost and improving the economic efficiency of pressure-boosting blasting experiments.

[0076] In one embodiment, such as Figure 3 As shown, a method for simulating the blasting of a clad tube is provided, which also includes:

[0077] S270, obtain the geometric and material parameters of the cladding tube.

[0078] The geometric parameters of the cladding tube include its length, axial length, cross-sectional thickness, outer diameter, and ellipticity. The material parameters of the cladding tube include its material, density, elastic parameters, plastic parameters, creep parameters, and fracture parameters, which are directly related to the material properties of the selected cladding tube. Elastic parameters include elastic modulus and Poisson's ratio, plastic parameters include yield strength, and fracture parameters include ultimate stress, ultimate strain, and strain energy.

[0079] Specifically, the geometric parameters of the aforementioned cladding tube can be obtained through measurement, and the material parameters of the aforementioned cladding tube can be obtained directly through simple experiments or by referring to material handbooks.

[0080] S280. Based on the geometric and material parameters of the cladding tube, establish the geometric model of the cladding tube.

[0081] Specifically, before conducting a simulated pressure-boosting explosion experiment on the cladding tube, it is necessary to first establish a geometric model corresponding to the cladding tube. This geometric model can be established based on the cladding tube's geometric and material parameters. Methods such as boundary representation, solid geometry construction, and hybrid representation can be employed.

[0082] S290, the geometric model of the cladding tube is meshed using the finite element method to obtain the meshed finite element model, which is then used as the virtual model corresponding to the cladding tube.

[0083] After establishing the geometric model of the cladding tube, the finite element method (FEM) is used to process the geometric model and generate its finite element model. Specifically, firstly, the element types and material properties of the geometric model are defined. Element types can be categorized by dimension into one-dimensional, two-dimensional, and three-dimensional elements. One-dimensional elements include rod and beam elements, two-dimensional elements include shell and planar elements, and three-dimensional elements include solid elements and thick shell elements. The element type can be selected based on the problem the finite element model needs to solve. Specifically, solid elements can be chosen as the element type for the geometric model, as they possess plasticity, hyperelasticity, and large deformation capabilities, making them suitable for simulating the deformation of elastic materials. Other element types that can be selected include solid elements, shell elements, and continuous shell elements. The material properties of the geometric model are defined as the material parameters of the cladding tube.

[0084] Secondly, according to the element type and material properties of the defined geometric model, the geometric model of the cladding tube is meshed to obtain the meshed finite element model. Specifically, the geometric model of the cladding tube can be meshed according to surface meshes to generate triangular or quadrilateral meshes; based on the generated triangular or quadrilateral meshes, the meshed finite element model is obtained. Alternatively, the geometric model of the cladding tube can be meshed according to volume meshes to generate tetrahedral or hexahedral meshes; based on the generated tetrahedral or hexahedral meshes, the meshed finite element model is obtained.

[0085] Finally, the meshed finite element model is used as the virtual model corresponding to the cladding tube. For example... Figure 4 The diagram shown is a schematic representation of the virtual model corresponding to the cladding tube in one embodiment. The virtual model corresponding to the cladding tube is a finite element model of the cladding tube. This finite element model includes multiple hexahedral meshes 420 obtained by meshing the geometric model of the cladding tube based on a volume mesh. The node and element numbering rules of the mesh can be input using third-party software or implemented through coding.

[0086] In this embodiment, the geometric and material parameters of the cladding tube are obtained, and a geometric model of the cladding tube is established based on these parameters. The geometric model of the cladding tube is meshed using the finite element method (FEM), resulting in a meshed FEM model. This meshed FEM model serves as the virtual model corresponding to the cladding tube. Establishing the geometric model of the cladding tube based on its geometric and material parameters allows for a realistic reconstruction of its geometric structure. The purpose of meshing a complex geometric model using the FEM is to replace a continuous geometric body with a finite number of discrete elements, ultimately dividing a complex geometric model into several simpler models. Therefore, using the FEM to mesh the geometric model of the cladding tube improves the accuracy of the resulting virtual model. Ultimately, this improves the accuracy of subsequent cladding tube blasting simulation experiments based on the virtual model.

[0087] In one embodiment, such as Figure 5 As shown, in S240 above, a pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting explosion test parameters to conduct a cladding tube explosion simulation experiment and generate pressure boosting explosion simulation parameters, including:

[0088] S520, at the experimental temperature, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate the simulation parameters of the cladding tube under the preset pressure load; the simulation parameters of the cladding tube include the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress value of each grid of the cladding tube.

[0089] Among them, the deformation of the inner wall and the deformation of the outer wall of the cladding tube are the changes in the inner and outer diameters of the cladding tube under the preset pressure load, and the stress value of each grid of the cladding tube is the value of the internal force generated by the interaction of various parts inside the cladding tube when the cladding tube is subjected to pressure load.

[0090] Specifically, fixed boundary conditions will be applied to both ends of the cladding tube to simulate the constraint conditions at both ends of the cladding tube in a real pressure boosting explosion experiment. When the overall simulation experimental environment temperature reaches the set temperature, one end of the cladding tube will be sealed, and the inner wall of the cladding tube will be pressurized from the other end to generate the pressure boosting explosion simulation parameters generated during the pressure boosting process.

[0091] When conducting pressure-boosting explosion tests on cladding tubes, different cladding tubes made of different materials need to be tested under different pressure-boosting explosion test parameters. Each cladding tube made of different materials corresponds to a specific test condition under different pressure-boosting explosion test parameters. Therefore, when conducting pressure-boosting explosion tests on cladding tubes, there are many test conditions required for cladding tubes made of different materials.

[0092] When selecting a finite element method (FEM) solver, the first step is to determine whether inertial force plays a dominant role in the pressure-boosting blasting simulation experiment based on the load-time correlation (i.e., the pressure-time curve). If it is determined that inertial force plays a dominant role, a dynamic analysis solver is used to obtain the pressure-boosting blasting parameters for any part of the geometric model. Conversely, a static analysis solver is used to obtain the pressure-boosting blasting parameters for any part of the geometric model.

[0093] S540, if the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, determine whether the deformation of the inner wall and the outer wall of the cladding tube are less than the maximum deformation; if not, proceed to step 580 and end the explosion simulation experiment.

[0094] S560, if the deformation of the inner wall and the outer wall of the cladding tube are less than the maximum deformation and the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, determine whether the cladding tube has fractured based on the stress value of each grid of the cladding tube; if so, proceed to step 580 and end the blasting simulation experiment.

[0095] The fracture phenomenon refers to the fracture that occurs when the cladding material is subjected to stress exceeding its fracture strength, which is the stress value at which the cladding material fractures.

[0096] The stress value used to determine the fracture phenomenon of the inner wall of the cladding tube can be obtained by referring to the fracture parameters in the material parameters of the cladding tube.

[0097] S570, if not, then adjust the preset pressure load according to the pressurization rate to obtain the adjusted preset pressure load. Use the adjusted preset pressure load as the new preset pressure load, and repeatedly execute the step of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube to generate the pressurization explosion simulation parameters of the cladding tube under the preset pressure load, until the stress value of each grid of the cladding tube in the pressurization explosion simulation parameters determines that the cladding tube has fractured. Then output the pressurization explosion simulation parameters of the cladding tube under multiple preset pressure loads.

[0098] Specifically, if no fracture occurs, the pressure applied to the inner wall of the cladding tube continues to increase according to the pressurization rate, the stress value of the cladding tube is updated, and the pressurization explosion simulation parameters at this moment are calculated until the cladding tube fractures, at which point the calculation ends and the pressurization explosion simulation parameters at each moment are output.

[0099] In this embodiment, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate simulation parameters for the cladding tube under the preset pressure load. The stress value of each grid of the cladding tube is used to determine whether the cladding tube has fractured. If not, the preset pressure load is adjusted according to the pressurization rate to obtain the adjusted preset pressure load. The adjusted preset pressure load is used as the new preset pressure load. The steps of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating simulation parameters for the cladding tube under the preset pressure load are repeated until the stress value of each grid of the cladding tube in the simulation parameters for the cladding tube determines that the cladding tube has fractured. Then, the simulation parameters for the cladding tube under multiple preset pressure loads are output. Traditional experiments can only obtain the deformation at the final moment, thus failing to acquire some intermediate quantities in the pressure-boosting explosion experiment. However, this scheme uses virtual experiments to obtain real-time pressure-boosting explosion simulation parameters of the cladding tube, including the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress values ​​of each grid of the cladding tube. It can obtain the deformation and stress values ​​of the cladding tube as the pressure-boosting rate changes, which is convenient for analyzing the cladding tube's ability to withstand high temperature and high pressure.

[0100] In one embodiment, such as Figure 6 As shown, S560 above determines whether the cladding tube has fractured based on the stress values ​​of each grid in the cladding tube, including:

[0101] S562, determine whether the cladding tube has yielded based on the stress values ​​of each grid in the cladding tube;

[0102] Yielding refers to the phenomenon where, when the stress exceeds the elastic limit, the material continues to undergo significant plastic deformation even when the external force no longer increases. The minimum stress value at which yielding occurs is called the yield point. The yield point can be found in the yield strength parameters of the cladding tube material. Specifically, the finite element method (FEM) is used to determine whether yielding has occurred on the inner wall of the cladding tube based on the stress values ​​of each mesh.

[0103] S564, If not, calculate the first deformation of the inner wall of the cladding tube and the first deformation of the outer wall; the first deformation includes the elastic deformation.

[0104] At this point, the deformation of the inner wall and the outer wall of the cladding tube are the first deformation. If no yielding occurs, the deformation of the cladding tube is only elastic deformation, and the deformation only includes elastic deformation. Specifically, the first deformation of the inner and outer walls of the cladding tube is calculated using a finite element solver.

[0105] S566, if so, calculate the second deformation of the inner wall and the second deformation of the outer wall of the casing tube, and determine whether the casing tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0106] Plastic deformation is mainly caused by creep, which is a phenomenon where the deformation increases over time. Plastic deformation, on the other hand, is inelastic and does not return to its original shape after the external force is removed. If yielding occurs, the deformation of the cladding tube includes not only elastic deformation but also plastic deformation. The deformation of the inner wall of the cladding tube includes both elastic and plastic deformation; the sum of these is the total deformation. In this case, the deformation of the inner and outer walls of the cladding tube constitutes the second deformation. Specifically, the second deformation of the inner and outer walls of the cladding tube is calculated using a finite element method (FEM).

[0107] In this embodiment, the stress values ​​of each grid in the cladding tube are used to determine whether the cladding tube has yielded. If not, the first deformation of the inner and outer walls of the cladding tube is calculated, including elastic deformation. If yes, the second deformation of the inner and outer walls of the cladding tube is calculated, and it is determined whether the cladding tube has fractured. The second deformation includes both elastic and plastic deformation. The calculated first and second deformations characterize the deformation of the cladding tube against high temperature and high pressure, and have certain reference value for predicting the thermodynamic behavior of the cladding tube after it is loaded into the reactor.

[0108] In one embodiment, the aforementioned preset constraint condition further includes the yield point of the cladding tube; S562, determining whether the cladding tube has yielded based on the stress values ​​of each grid of the cladding tube, includes:

[0109] Compare the stress values ​​of each grid in the cladding tube with the yield point of the cladding tube;

[0110] Determine whether the cladding tube has yielded based on its size relationship.

[0111] Specifically, if the stress values ​​of each mesh in the cladding tube are less than the yield point of the cladding tube, then no yielding has occurred, and the deformation of the cladding tube remains elastic, exhibiting elastic deformation. If the stress values ​​of each mesh in the cladding tube are greater than the yield point, then yielding has occurred, and the cladding tube exhibits plastic deformation. Specifically, the finite element method (FEM) solver determines whether the cladding tube has yielded based on whether the stress values ​​of each mesh exceed the yield point.

[0112] In this embodiment, the stress values ​​of each grid in the cladding tube are compared with the yield point of the cladding tube; based on this relationship, it is determined whether the cladding tube has yielded. Yielding is one of the manifestations of material properties and has a significant impact on the material's practical applications. Therefore, determining the yield of the cladding tube is an important step in subsequent material capability analysis.

[0113] In one embodiment, such as Figure 7 As shown in Figure S260 above, the simulation parameters for the boosted blast are analyzed, and the simulation results for the boosted blast are generated, including:

[0114] S262, Based on the deformation of the outer wall of the casing tube under multiple preset pressure loads, calculate the first correspondence between the multiple preset pressure loads and the deformation of the outer wall of the casing tube under multiple preset pressure loads.

[0115] Specifically, the first correspondence between the deformation of the outer wall of the cladding tube is calculated using a finite element solver, and the first correspondence between the calculated multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads is expressed in the form of a curve.

[0116] S264, obtain the application time of multiple preset pressure loads, and calculate the second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the casing tube under multiple preset pressure loads.

[0117] Specifically, the second correspondence between the deformation of the outer wall of the cladding tube is calculated using a finite element solver. This second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the cladding tube under these preset pressure loads is then expressed as a curve. For example... Figure 8 The schematic diagram of the deformation-time curve of the pressure boosting explosion experiment clearly shows the change of the deformation of the cladding tube over time.

[0118] S266. Based on the first and second correspondences, calculate the pressure resistance time and cross-sectional elongation of the cladding tube.

[0119] Among them, the pressure resistance time of the cladding tube is the time from the application of pressure load to the fracture of the cladding tube, and the cross-sectional elongation rate is the percentage of the initial perimeter of the cladding tube to the increase in perimeter after the pressure boosting and bursting test. It is an important parameter representing the toughness and plastic deformation or creep deformation of the cladding tube.

[0120] Specifically, the pressure resistance time and cross-sectional elongation of the cladding tube can be calculated using a finite element method. The equivalent stress contour plot during the equivalent pressure boosting explosion simulation process is shown below. Figure 9 As shown, the geometric model of the cladding tube undergoes deformation during the entire pressurization blasting process.

[0121] In this embodiment, based on the deformation of the outer wall of the cladding tube under multiple preset pressure loads, a first correspondence is calculated between the multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads; the application time of the multiple preset pressure loads is obtained, and a second correspondence is calculated between the application time of the multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads; based on the first and second correspondences, the pressure resistance time and cross-sectional elongation of the cladding tube are calculated. The first correspondence in the pressure-boosting burst results clearly reflects the increase in deformation of the cladding tube as the applied pressure load increases, and the second correspondence clearly reflects the change in deformation of the cladding tube at each moment. The pressure resistance time and cross-sectional elongation of the cladding tube characterize the ability of the cladding tube to resist high temperature and high pressure, thereby judging the ability of the selected cladding tube material in practical applications.

[0122] In a specific embodiment, such as Figure 10 As shown, a method for simulating the blasting of a clad tube is provided, which includes the following steps:

[0123] S1002: Obtain the experimental parameters for the pressure boosting and bursting of the cladding tube, including the experimental temperature, pressure boosting rate, and preset constraint conditions;

[0124] S1004: Obtain the geometric and material parameters of the cladding tube, define the element type, and define the material properties. Create a solid model of the cladding tube based on its geometric parameters.

[0125] like Figure 11 The diagram shown is a flowchart of a method for simulating the bursting of a cladding tube in one embodiment. Combined with... Figure 10 As shown, the device corresponding to this cladding tube explosion simulation method may specifically include an input module, a preprocessing module, an analysis module, and a post-processing and output module. The input module is used to input the geometric parameters, material parameters, and pressure-boosting explosion test parameters of the cladding tube.

[0126] S1006: The geometric model of the cladding tube is meshed using the finite element method to obtain the meshed finite element model, which is then used as the virtual model corresponding to the cladding tube.

[0127] Combination Figure 11 As shown, the preprocessing module is used to establish the geometric model of the cladding tube based on the input geometric and material parameters and to perform mesh generation. The preprocessing module is also used to read the initial pressure load.

[0128] S1008: Apply pressure load to the virtual model corresponding to the cladding tube according to the pressure boosting explosion test parameters to conduct a cladding tube explosion simulation test.

[0129] S1010: At the experimental temperature, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate the simulation parameters of the cladding tube under the preset pressure load; the simulation parameters of the cladding tube include the deformation of the inner wall of the cladding tube and the stress value of the inner wall of the cladding tube.

[0130] S1012: Under constrained conditions, determine whether the cladding tube has yielded based on the stress values ​​of each grid. If not, calculate the first deformation of the inner and outer walls of the cladding tube; the first deformation includes elastic deformation. If yes, calculate the second deformation of the inner and outer walls of the cladding tube and determine whether the cladding tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0131] S1014: Under constrained conditions, determine whether the cladding tube has fractured based on the stress values ​​of each grid of the cladding tube. Then, adjust the preset pressure load according to the pressurization rate to obtain the adjusted preset pressure load. Use the adjusted preset pressure load as the new preset pressure load. Repeat the steps of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating the pressurization explosion simulation parameters of the cladding tube under the preset pressure load until the stress values ​​of each grid of the cladding tube in the pressurization explosion simulation parameters determine that the cladding tube has fractured.

[0132] Combination Figure 11 As shown, the analysis module first reads the initial pressure load at the initial time (t=0), obtaining the initial elastic deformation of the inner and outer walls of the cladding tube and the stress values ​​of each grid in the cladding tube under the initial pressure load. Second, it continuously updates the pressure load, obtaining the deformation of the inner and outer walls of the cladding tube and the stress values ​​of each grid in the cladding tube at each updated pressure load (assuming the previous update time was t=0, then t=0+dt at this time). Finally, it determines whether the stress values ​​of each grid in the cladding tube reach the yield point. If the stress values ​​of each grid in the cladding tube reach the yield point, it is determined that the cladding tube has undergone plastic deformation. In this case, when calculating the total deformation of the inner wall of the cladding tube, the sum of the elastic and plastic deformation needs to be calculated. If the stress values ​​of each grid in the cladding tube do not reach the yield point, it is determined that the cladding tube has not undergone plastic deformation. In this case, when calculating the total deformation of the inner wall of the cladding tube, only the elastic deformation needs to be calculated. Furthermore, after determining that the stress value of the inner wall of the cladding tube has reached the yield point, it is necessary to further determine whether the cladding tube has fractured. If the cladding tube has fractured, the calculation process ends. If the cladding tube has not fractured, the process returns to continuously updating the pressure load, and the steps of obtaining the deformation of the inner and outer walls of the cladding tube and the stress values ​​of each grid of the cladding tube at that time (assuming the previous update time is t, then t = t + dt) under each updated pressure load are repeated cyclically.

[0133] S1016: Analyze the simulation parameters for pressure boosting blasting and generate simulation results including the pressure resistance time and cross-sectional elongation of the cladding tube. Based on the deformation of the outer wall of the cladding tube, a first correspondence can be derived between the preset pressure load and the deformation of the outer wall of the cladding tube under multiple preset pressure loads, and a second correspondence can be derived between the application time of multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads.

[0134] Combination Figure 11 As shown, the post-processing and output module is used to process and analyze the simulation parameters of the pressure boosting blast to obtain simulation results such as stress, deformation, pressure-radius curves, and pressure bearing time.

[0135] In this embodiment, traditional pressure-boosting burst tests require different combinations of temperatures and pressure-boosting rates for cladding tubes made of different materials, resulting in numerous testing conditions for each material. Consequently, a large number of cladding tubes are needed for the burst tests, and each tube is damaged after each test and cannot be reused, leading to significant resource waste. This solution first obtains the pressure-boosting burst test parameters for the selected cladding tube material and then simulates a specific condition in a real pressure-boosting burst test using these parameters. A burst simulation experiment is then conducted on a virtual model of the selected cladding tube to generate burst simulation parameters. These parameters are then analyzed to generate pressure-boosting burst simulation results, which characterize the selected cladding tube material's resistance to high temperatures and pressures. This solution replaces the real pressure-boosting burst test with a virtual experiment method, simulating various conditions of the real test using corresponding pressure-boosting burst test parameters, thus avoiding the waste of cladding tube material caused by numerous experiments in a real test. This reduces the cost of pressure boosting blasting experiments and improves their economic efficiency.

[0136] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0137] Based on the same inventive concept, this application also provides a cladding tube blasting simulation device for implementing the cladding tube blasting simulation method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more cladding tube blasting simulation device embodiments provided below can be found in the limitations of the cladding tube blasting simulation method described above, and will not be repeated here.

[0138] In one embodiment, such as Figure 12 As shown, a casing tube blasting simulation device 1200 is provided, including: an acquisition module 1220, an analysis module 1240, and an output module 1260, wherein:

[0139] Acquire module 1220 to obtain the pressure boosting and bursting test parameters of the cladding tube.

[0140] Analysis module 1240 applies pressure load to the virtual model corresponding to the cladding tube according to the pressure boosting blasting experiment parameters, conducts a cladding tube blasting simulation experiment, and generates pressure boosting blasting simulation parameters.

[0141] The output module 1260 analyzes the parameters of the pressure boosting blast simulation and generates the simulation results.

[0142] The detection and decoding device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0143] In one embodiment, a casing tube blasting simulation device 1200 is provided, which further includes: a modeling module for acquiring the geometric parameters and material parameters of the casing tube; establishing a geometric model of the casing tube based on the geometric parameters and material parameters of the casing tube; performing meshing on the geometric model of the casing tube using the finite element method to obtain a meshed finite element model, and using the meshed finite element model as the virtual model corresponding to the casing tube.

[0144] In one embodiment, the analysis module 1240 further includes a generation unit, a fracture judgment unit, and an output unit, wherein,

[0145] The generation unit is used to apply a preset pressure load to the inner wall of the virtual model corresponding to the cladding tube at the experimental temperature, and generate the simulation parameters of the cladding tube under the preset pressure load for pressure boosting and bursting. The simulation parameters of pressure boosting and bursting include the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress values ​​of each grid of the cladding tube.

[0146] The fracture detection unit is used to determine whether the inner wall of the cladding tube has fractured when the deformation of the inner and outer walls of the cladding tube is less than the maximum deformation and the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, based on the stress values ​​of each grid of the cladding tube.

[0147] The output unit is used to adjust the preset pressure load according to the pressurization rate if no fracture occurs, obtain the adjusted preset pressure load, and use the adjusted preset pressure load as the new preset pressure load. The steps of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating the pressurization explosion simulation parameters of the cladding tube under the preset pressure load are executed cyclically until the stress value of each grid of the cladding tube in the pressurization explosion simulation parameters determines that the cladding tube has fractured. Then, the pressurization explosion simulation parameters of the cladding tube under multiple preset pressure loads are output.

[0148] In one embodiment, the fracture determination unit further includes a yield determination subunit, a first calculation subunit, and a second calculation subunit, wherein,

[0149] The yield judgment sub-element is used to determine whether the cladding tube has yielded based on the stress values ​​of each grid in the cladding tube.

[0150] The first calculation subunit is used to calculate the first deformation of the inner wall of the cladding tube, the first deformation of the outer wall, and the first deformation if no yielding occurs; the first deformation includes elastic deformation.

[0151] The second calculation subunit is used to calculate the second deformation of the inner wall and the second deformation of the outer wall of the cladding tube if yielding occurs, and to determine whether the cladding tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0152] In one embodiment, the yield judgment sub-unit is also used to compare the stress values ​​of each grid of the cladding tube with the yield point of the cladding tube; and to determine whether the cladding tube has yielded based on the magnitude relationship.

[0153] In one embodiment, the output module 1260 further includes a third computing unit, a fourth computing unit, and a fifth computing unit.

[0154] The third calculation unit is used to calculate the first correspondence between the deformation of the outer wall of the cladding tube under multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads.

[0155] The fourth calculation unit is used to obtain the application time of multiple preset pressure loads and calculate the second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the casing tube under multiple preset pressure loads.

[0156] The fifth calculation unit is used to calculate the pressure resistance time and cross-sectional elongation of the cladding tube based on the first and second correspondences.

[0157] Each module in the aforementioned casing tube blasting simulation device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the corresponding operations of each module.

[0158] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 13 As shown, the computer device includes a processor, memory, and network interface connected via a system bus. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores data from boost-detonation experiments. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer program implements a method for simulating the detonation of a casing tube.

[0159] Those skilled in the art will understand that Figure 13 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0160] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0161] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0162] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting test parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0163] The simulation parameters of the pressure boosting blast are analyzed, and the simulation results of the pressure boosting blast are generated.

[0164] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0165] Obtain the geometric and material parameters of the cladding tube;

[0166] Based on the geometric and material parameters of the cladding tube, establish a geometric model of the cladding tube;

[0167] The geometric model of the cladding tube is meshed using the finite element method to obtain the meshed finite element model, which is then used as the virtual model corresponding to the cladding tube.

[0168] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0169] At the experimental temperature, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate the simulation parameters of the cladding tube under the preset pressure load; the simulation parameters of the cladding tube include the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress value of each grid of the cladding tube.

[0170] When the deformation of the inner wall and the outer wall of the cladding tube are less than the maximum deformation and the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, the stress value of each grid of the cladding tube is used to determine whether the cladding tube has fractured.

[0171] If not, the preset pressure load is adjusted according to the pressurization rate to obtain the adjusted preset pressure load. The adjusted preset pressure load is then used as the new preset pressure load. The process of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating the pressurization explosion simulation parameters of the cladding tube under the preset pressure load is repeated until the stress value of each grid of the cladding tube in the pressurization explosion simulation parameters determines that the cladding tube has fractured. Then, the pressurization explosion simulation parameters of the cladding tube under multiple preset pressure loads are output.

[0172] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0173] Determine whether the cladding tube has yielded based on the stress values ​​of each grid in the cladding tube;

[0174] If not, calculate the first deformation of the inner wall of the cladding tube and the first deformation of the outer wall; the first deformation includes the elastic deformation.

[0175] If so, calculate the second deformation of the inner wall and the second deformation of the outer wall of the casing tube, and determine whether the casing tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0176] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0177] Compare the stress values ​​of each grid in the cladding tube with the yield point of the cladding tube; determine whether the cladding tube has yielded based on the magnitude of the relationship.

[0178] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0179] Based on the deformation of the outer wall of the cladding tube under multiple preset pressure loads, calculate the first correspondence between the multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads.

[0180] Obtain the application time of multiple preset pressure loads, and calculate the second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads;

[0181] Based on the first and second correspondences, calculate the pressure resistance time and cross-sectional elongation of the cladding tube.

[0182] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0183] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0184] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting test parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0185] The simulation parameters of the pressure boosting blast are analyzed, and the simulation results of the pressure boosting blast are generated.

[0186] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0187] Obtain the geometric and material parameters of the cladding tube;

[0188] Based on the geometric and material parameters of the cladding tube, establish a geometric model of the cladding tube;

[0189] The geometric model of the cladding tube is meshed using the finite element method to obtain the meshed finite element model, which is then used as the virtual model corresponding to the cladding tube.

[0190] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0191] At the experimental temperature, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate the simulation parameters of the cladding tube under the preset pressure load; the simulation parameters of the cladding tube include the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress value of each grid of the cladding tube.

[0192] When the deformation of the inner wall and the outer wall of the cladding tube are less than the maximum deformation and the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, the stress value of each grid of the cladding tube is used to determine whether the cladding tube has fractured.

[0193] If not, the preset pressure load is adjusted according to the pressurization rate to obtain the adjusted preset pressure load. The adjusted preset pressure load is then used as the new preset pressure load. The process of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating the pressurization explosion simulation parameters of the cladding tube under the preset pressure load is repeated until the stress value of each grid of the cladding tube in the pressurization explosion simulation parameters determines that the cladding tube has fractured. Then, the pressurization explosion simulation parameters of the cladding tube under multiple preset pressure loads are output.

[0194] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0195] Determine whether the cladding tube has yielded based on the stress values ​​of each grid in the cladding tube;

[0196] If not, calculate the first deformation of the inner wall of the cladding tube and the first deformation of the outer wall; the first deformation includes the elastic deformation.

[0197] If so, calculate the second deformation of the inner wall and the second deformation of the outer wall of the casing tube, and determine whether the casing tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0198] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0199] Compare the stress values ​​of each grid in the cladding tube with the yield point of the cladding tube; determine whether the cladding tube has yielded based on the magnitude of the relationship.

[0200] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0201] Based on the deformation of the outer wall of the cladding tube under multiple preset pressure loads, calculate the first correspondence between the multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads.

[0202] Obtain the application time of multiple preset pressure loads, and calculate the second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads;

[0203] Based on the first and second correspondences, calculate the pressure resistance time and cross-sectional elongation of the cladding tube.

[0204] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0205] Obtain the parameters for the pressure boosting and bursting test of the cladding tube;

[0206] Pressure load is applied to the virtual model corresponding to the cladding tube according to the pressure boosting blasting test parameters to conduct a cladding tube blasting simulation experiment and generate pressure boosting blasting simulation parameters.

[0207] The simulation parameters of the pressure boosting blast are analyzed, and the simulation results of the pressure boosting blast are generated.

[0208] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0209] Obtain the geometric and material parameters of the cladding tube;

[0210] Based on the geometric and material parameters of the cladding tube, establish a geometric model of the cladding tube;

[0211] The geometric model of the cladding tube is meshed using the finite element method to obtain the meshed finite element model, which is then used as the virtual model corresponding to the cladding tube.

[0212] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0213] At the experimental temperature, a preset pressure load is applied to the inner wall of the virtual model corresponding to the cladding tube to generate the simulation parameters of the cladding tube under the preset pressure load; the simulation parameters of the cladding tube include the deformation of the inner wall of the cladding tube, the deformation of the outer wall, and the stress value of each grid of the cladding tube.

[0214] When the deformation of the inner wall and the outer wall of the cladding tube are less than the maximum deformation and the pressure load on the inner wall of the cladding tube is less than the maximum pressure load, the stress value of each grid of the cladding tube is used to determine whether the cladding tube has fractured.

[0215] If not, the preset pressure load is adjusted according to the pressurization rate to obtain the adjusted preset pressure load. The adjusted preset pressure load is then used as the new preset pressure load. The process of applying the preset pressure load to the inner wall of the virtual model corresponding to the cladding tube and generating the pressurization explosion simulation parameters of the cladding tube under the preset pressure load is repeated until the stress value of each grid of the cladding tube in the pressurization explosion simulation parameters determines that the cladding tube has fractured. Then, the pressurization explosion simulation parameters of the cladding tube under multiple preset pressure loads are output.

[0216] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0217] Determine whether the cladding tube has yielded based on the stress values ​​of each grid in the cladding tube;

[0218] If not, calculate the first deformation of the inner wall of the cladding tube and the first deformation of the outer wall; the first deformation includes the elastic deformation.

[0219] If so, calculate the second deformation of the inner wall and the second deformation of the outer wall of the casing tube, and determine whether the casing tube has fractured; the second deformation includes elastic deformation and plastic deformation.

[0220] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0221] Compare the stress values ​​of each grid in the cladding tube with the yield point of the cladding tube; determine whether the cladding tube has yielded based on the magnitude of the relationship.

[0222] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0223] Based on the deformation of the outer wall of the cladding tube under multiple preset pressure loads, calculate the first correspondence between the multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads.

[0224] Obtain the application time of multiple preset pressure loads, and calculate the second correspondence between the application time of multiple preset pressure loads and the deformation of the outer wall of the cladding tube under multiple preset pressure loads;

[0225] Based on the first and second correspondences, calculate the pressure resistance time and cross-sectional elongation of the cladding tube.

[0226] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0227] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0228] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0229] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A cladding tube burst simulation method characterized by, The method comprises: obtaining the pressure boosting burst experiment parameters of the cladding tube; the pressure boosting burst experiment parameters comprise an experiment temperature, a pressure boosting rate and preset constraint conditions; the preset constraint conditions comprise maximum deformation amounts of an inner wall and an outer wall of the cladding tube, a maximum pressure load of the inner wall of the cladding tube and a yield point of the cladding tube; applying a preset pressure load to the inner wall of the virtual model corresponding to the cladding tube at the experiment temperature to generate pressure boosting burst simulation parameters of the cladding tube under the preset pressure load; the pressure boosting burst simulation parameters comprise deformation amounts of the inner wall and the outer wall of the cladding tube and stress values of each grid of the cladding tube; in the case that the deformation amounts of the inner wall and the outer wall of the cladding tube are less than the maximum deformation amounts and the pressure load of the inner wall of the cladding tube is less than the maximum pressure load, determining whether the cladding tube has a fracture phenomenon according to the stress values of each grid of the cladding tube; if not, adjusting the preset pressure load according to the pressure boosting rate to obtain an adjusted preset pressure load, taking the adjusted preset pressure load as a new preset pressure load and cyclically performing the step of applying a preset pressure load to the inner wall of the virtual model corresponding to the cladding tube to generate pressure boosting burst simulation parameters of the cladding tube under the preset pressure load until it is determined that the cladding tube has a fracture phenomenon according to the stress values of each grid of the cladding tube in the pressure boosting burst simulation parameters, and then outputting the pressure boosting burst simulation parameters of the cladding tube under a plurality of preset pressure loads; wherein the determining whether the cladding tube has a fracture phenomenon according to the stress values of each grid of the cladding tube comprises determining whether the cladding tube has a yield phenomenon according to the stress values of each grid of the cladding tube. analyzing the pressure boosting burst simulation parameters to generate pressure boosting burst simulation results; the pressure boosting burst simulation results comprise a pressure resistance time and a section elongation rate of the cladding tube.

2. The method of claim 1, wherein, The virtual model comprises a finite element model; the method further comprises: obtaining geometric parameters and material parameters of the cladding tube; establishing a geometric model of the cladding tube according to the geometric parameters and the material parameters of the cladding tube; dividing the geometric model of the cladding tube into grids by using a finite element calculation method to obtain a finite element model after grid division, and taking the finite element model after grid division as the virtual model corresponding to the cladding tube.

3. The method of claim 1, wherein, The determining whether the cladding tube has a yield phenomenon according to the stress values of each grid of the cladding tube comprises: if not, calculating a first deformation amount of the inner wall and a first deformation amount of the outer wall of the cladding tube; the first deformation amount comprises an elastic deformation amount; if yes, calculating a second deformation amount of the inner wall and a second deformation amount of the outer wall of the cladding tube and determining whether the cladding tube has a fracture phenomenon; the second deformation amount comprises an elastic deformation amount and a plastic deformation amount.

4. The method of claim 3, wherein, The determining whether the cladding tube has a yield phenomenon according to the stress values of each grid of the cladding tube comprises: comparing the stress values of each grid of the cladding tube with the yield point of the cladding tube; determining whether the cladding tube has a yield phenomenon based on the comparison.

5. The method of claim 1, wherein, The analyzing the pressure boosting explosion simulation parameters to generate a pressure boosting explosion simulation result comprises: According to the deformation amount of the outer wall of the cladding tube under the plurality of preset pressure loads, a first correspondence relationship between the plurality of preset pressure loads and the deformation amount of the outer wall of the cladding tube under the plurality of preset pressure loads is calculated; The application time of the plurality of preset pressure loads is obtained, and a second correspondence relationship between the application time of the plurality of preset pressure loads and the deformation amount of the outer wall of the cladding tube under the plurality of preset pressure loads is calculated; According to the first correspondence relationship and the second correspondence relationship, the pressure resistance time and the cross-sectional elongation rate of the cladding tube are calculated.

6. The method of claim 1, wherein, The preset pressure load is obtained based on at least one of a temperature-related parameter, a humidity-related parameter, an irradiation-related parameter, and a pressure-related parameter applied to the cladding tube involved in the pressure boosting explosion experiment.

7. A cladding tube burst simulation apparatus characterized by comprising: The device comprises: An obtaining module obtains pressure boosting explosion experiment parameters of a cladding tube; the pressure boosting explosion experiment parameters comprise an experiment temperature, a pressure boosting rate, and preset constraint conditions; the preset constraint conditions comprise maximum deformation amounts of an inner wall and an outer wall of the cladding tube, a maximum pressure load of the inner wall of the cladding tube, and a yield point of the cladding tube; An analyzing module applies a preset pressure load to the inner wall of a virtual model corresponding to the cladding tube under the experiment temperature to generate pressure boosting explosion simulation parameters of the cladding tube under the preset pressure load; the pressure boosting explosion simulation parameters comprise deformation amounts of the inner wall and the outer wall of the cladding tube and stress values of each grid of the cladding tube; in a case where the deformation amounts of the inner wall and the outer wall of the cladding tube are less than the maximum deformation amounts and the pressure load of the inner wall of the cladding tube is less than the maximum pressure load, whether the cladding tube has a rupture phenomenon is determined according to the stress values of each grid of the cladding tube; if not, the preset pressure load is adjusted according to the pressure boosting rate to obtain an adjusted preset pressure load; the adjusted preset pressure load is taken as a new preset pressure load, and the step of applying a preset pressure load to the inner wall of a virtual model corresponding to the cladding tube is repeatedly performed to generate pressure boosting explosion simulation parameters of the cladding tube under the preset pressure load until it is determined that the cladding tube has a rupture phenomenon according to the stress values of each grid of the cladding tube in the pressure boosting explosion simulation parameters; and the pressure boosting explosion simulation parameters of the cladding tube under a plurality of preset pressure loads are output. The determining whether the cladding tube has a rupture phenomenon according to the stress values of each grid of the cladding tube comprises determining whether the cladding tube has a yield phenomenon according to the stress values of each grid of the cladding tube. An outputting module analyzes the pressure boosting explosion simulation parameters to generate a pressure boosting explosion simulation result; the pressure boosting explosion simulation result comprises a pressure resistance time and a cross-sectional elongation rate of the cladding tube.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to implement the steps of the method in any one of claims 1 to 6.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that, The computer program, which when executed by the processor, implements the steps of the method of any one of claims 1 to 6.

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