Reliability analysis method, device and equipment for steam generation pipe and storage medium

Abstract

The invention relates to the technical field of equipment simulation analysis, in particular to a reliability analysis method, device and equipment for a steam generation pipe and a storage medium. A one-dimensional simulation model of the steam generation pipe is firstly built, one-dimensional simulation analysis is conducted, and composition, connection relation and parameter information of the steam generation pipe are visually obtained; a one-dimensional simulation analysis result and parameterized variables of the steam generation pipe are combined to construct a three-dimensional simulation model, and finally finite element analysis is performed through the three-dimensional simulation analysis model, so that reliability analysis is performed on running data of the steam generation pipe in multiple dimensions, the difficulty of simulation analysis of the steam generation pipe is reduced, and the reliability of the steam generation pipe is improved. The reliability analysis efficiency of the steam generation pipe is improved, and the technical problems that in the prior art, when reliability analysis is conducted on the steam generation pipe, gas flow in the steam generation pipe cannot be captured, the operation reliability analysis effect of the steam generation pipe is poor, and the analysis workload is large are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment simulation analysis, and in particular to a reliability analysis method, device, equipment and storage medium for a steam generating tube. Background Art

[0002] The steam generating tube is the place where the steam generator completes heat transfer and is the core component of the steam generator. However, the steam generating tube is a typical thin-walled flow channel structure with complex internal flow and harsh operating conditions. It is a weak point in the reliability of the entire steam generator. When the operation reliability analysis of the steam generator is carried out in traditional technology, the test cycle is long and the cost is high, the test condition parameter combination is limited, and the test measurement technology is limited to capture the flow mechanism phenomenon inside the steam generating tube well, resulting in poor operation reliability analysis of the steam generating tube and a large analysis workload.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a reliability analysis method, device, equipment and storage medium for a steam generating tube, aiming to solve the technical problem in the prior art that when performing reliability analysis on the steam generating tube, the gas flow in the steam generating tube cannot be captured, resulting in poor operation reliability analysis effect of the steam generating tube and a large analysis workload.

[0005] To achieve the above object, the present invention provides a reliability analysis method for a steam generating tube, the method comprising the following steps:

[0006] Constructing a one-dimensional simulation model of the steam generating tube by using a preset modeling database;

[0007] Perform simulation analysis through the one-dimensional simulation model to obtain a one-dimensional simulation analysis result;

[0008] Constructing a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube;

[0009] Performing finite element analysis through the three-dimensional simulation analysis model to obtain finite element results of the steam generating tube;

[0010] A reliability analysis is performed on the steam generating tube according to the finite element results and the corresponding failure physical model to obtain a reliability analysis result of the steam generating tube.

[0011] Optionally, constructing the one-dimensional simulation model of the steam generating tube by using a preset modeling database includes:

[0012] Obtaining parameterized variables of the steam generating tube;

[0013] Constructing a vapor-liquid two-phase nonlinear equation system based on the parameterized variables;

[0014] Solving the vapor-liquid two-phase nonlinear equation group by presetting a constitutive closed equation model to obtain a plurality of model structure parameters;

[0015] A one-dimensional simulation model of the steam generating tube is constructed according to the multiple model structure parameters through a preset modeling database.

[0016] Optionally, performing simulation analysis by using the one-dimensional simulation model to obtain a one-dimensional simulation analysis result includes:

[0017] Obtaining parameterized variables of the steam generating tube;

[0018] Performing model parameter configuration on the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model;

[0019] A simulation analysis is performed using the target one-dimensional simulation model to obtain a one-dimensional simulation analysis result.

[0020] Optionally, the parameterized variables include at least structural parameter variables and environmental parameter variables;

[0021] The step of configuring the model parameters of the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model includes:

[0022] The structural parameter variables and the environmental parameter variables are transmitted to the NUMAP modeling module through a batch parameter transmission command stream;

[0023] The NUMAP modeling module is used to configure parameters of each subcomponent in the one-dimensional simulation model to obtain a target one-dimensional simulation model.

[0024] Optionally, constructing a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube includes:

[0025] Generate a working condition related variable parameter command stream according to the parameterized variables and the one-dimensional simulation analysis results;

[0026] Constructing a parametric auxiliary engineering model for finite element analysis of the steam generating tube based on the operating condition related variable parameter command stream and by using preset parametric design rules;

[0027] Generate a finite element solution parametric command stream based on preset parametric design rules to update the configuration parameters of each solver in the parametric auxiliary engineering model;

[0028] Generate a finite element analysis file in a preset format according to the finite element solution parameterized command stream and the working condition related variable parameter command stream;

[0029] A three-dimensional simulation analysis model of the steam generating tube is constructed based on the finite element analysis file.

[0030] Optionally, performing reliability analysis on the steam generating tube according to the finite element result and the corresponding failure physical model to obtain the reliability analysis result of the steam generating tube includes:

[0031] In response to a structural analysis result extraction instruction, extracting finite element response data from the finite element results;

[0032] Determining a fatigue failure mode of the steam generating tube and a target failure physical model corresponding to the fatigue failure mode according to the finite element response data;

[0033] Calculating the target fatigue life of the steam generating tube by using the target failure physical model according to the finite element response data;

[0034] An operating life reliability analysis result of the steam generating tube is generated according to the target fatigue life.

[0035] Optionally, generating the operating life reliability analysis result of the steam generating tube according to the target fatigue life includes:

[0036] Constructing a limit state function of the steam generating tube;

[0037] Determine the fatigue life threshold under each fatigue failure mode by using the limit state function;

[0038] Calculating the operating life reliability of the steam generating tube according to the fatigue life threshold value and the target reliability analysis model under each fatigue failure mode and the target fatigue probability life;

[0039] An operating life reliability analysis result of the steam generating tube is generated according to the operating life reliability.

[0040] Optionally, the calculating the operating life reliability of the steam generating tube according to the fatigue life threshold value and the target reliability analysis model under each fatigue failure mode and the target fatigue probability life includes:

[0041] Sampling the target fatigue probability life under each fatigue failure mode to obtain a target fatigue probability life sample;

[0042] Calculate the reliability index under each fatigue failure mode according to the fatigue life threshold and the target fatigue probability life;

[0043] determining a target failure indication indicator according to the reliability indicator;

[0044] The operating life reliability of the steam generating tube is calculated according to the target fatigue probability life sample and the target failure indication index.

[0045] Optionally, determining a target failure indication indicator according to the reliability indicator includes:

[0046] When the reliability index is less than or equal to a preset threshold, determining the target failure indication index to be a first threshold;

[0047] When the reliability index is greater than a preset threshold, the target failure indication index is determined to be a second threshold, and the second threshold is less than the first threshold.

[0048] In addition, to achieve the above-mentioned purpose, the present invention also proposes a reliability analysis device for a steam generating tube, the reliability analysis device for a steam generating tube comprising:

[0049] A one-dimensional construction module, used to construct a one-dimensional simulation model of the steam generating tube through a preset modeling database;

[0050] A one-dimensional analysis module, used to perform simulation analysis through the one-dimensional simulation model to obtain a one-dimensional simulation analysis result;

[0051] A three-dimensional construction module, used to construct a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube;

[0052] A finite element model analysis module, used for performing finite element analysis through the three-dimensional simulation analysis model to obtain finite element results of the steam generating tube;

[0053] The reliability analysis module is used to perform reliability analysis on the steam generating tube according to the finite element results and the corresponding failure physical model to obtain the reliability analysis result of the steam generating tube.

[0054] In addition, to achieve the above-mentioned purpose, the present invention also proposes a reliability analysis device for a steam generating tube, the reliability analysis device for the steam generating tube comprising: a memory, a processor, and a reliability analysis program for the steam generating tube stored in the memory and executable on the processor, the reliability analysis program for the steam generating tube being configured to implement the steps of the reliability analysis method for the steam generating tube as described above.

[0055] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a reliability analysis program for a steam generating tube is stored. When the reliability analysis program for a steam generating tube is executed by a processor, the steps of the reliability analysis method for a steam generating tube as described above are implemented.

[0056] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the reliability analysis method of the steam generating tube as described above are implemented.

[0057] One or more technical solutions proposed in the present invention have at least the following technical effects: the present invention discloses a method for analyzing the reliability of the operating life of a steam generating tube, the method comprising: constructing a one-dimensional simulation model of the steam generating tube through a preset modeling database; performing simulation analysis through the one-dimensional simulation model to obtain a one-dimensional simulation analysis result; constructing a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube; performing finite element analysis through the three-dimensional simulation analysis model to obtain a finite element result of the steam generating tube; performing reliability analysis on the steam generating tube according to the finite element result and a corresponding failure physical model to obtain a result of the steam generating tube. The reliability analysis results of the steam generating tube are compared with the prior art. The present invention first constructs a one-dimensional simulation model of the steam generating tube and performs a one-dimensional simulation analysis to intuitively obtain the composition, connection relationship and parameter information of the steam generating tube, and constructs a three-dimensional simulation model in combination with the one-dimensional simulation analysis results and the parameterized variables of the steam generating tube. Finally, a finite element analysis is performed through the three-dimensional simulation analysis model, so that the operating data of the steam generating tube in multiple dimensions are analyzed for reliability, which reduces the difficulty of simulation analysis of the steam generating tube, improves the efficiency of reliability analysis of the steam generating tube, and avoids the technical problem that when performing reliability analysis on the steam generating tube in the prior art, the gas flow in the steam generating tube cannot be captured, resulting in poor operation reliability analysis effect of the steam generating tube and a large analysis workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0059] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0060] Figure 1 It is a schematic flow chart of a first embodiment of a reliability analysis method for a steam generating tube according to the present invention;

[0061] Figure 2 A schematic diagram of a one-dimensional simulation model architecture of an embodiment of a reliability analysis method for a steam generating tube according to the present invention;

[0062] Figure 3 A schematic diagram of a curve showing a one-dimensional simulation analysis result of an embodiment of a reliability analysis method for a steam generating tube according to the present invention;

[0063] Figure 4 It is a schematic flow chart of a second embodiment of a reliability analysis method for a steam generating tube according to the present invention;

[0064] Figure 5 It is a schematic flow chart of a third embodiment of a reliability analysis method for a steam generating tube according to the present invention;

[0065] Figure 6 It is a schematic diagram of the overall process of an embodiment of a reliability analysis method of a steam generating tube of the present invention;

[0066] Figure 7 It is a structural block diagram of a first embodiment of a reliability analysis device for a steam generating tube according to the present invention;

[0067] Figure 8 It is a structural schematic diagram of a reliability analysis device for a steam generating tube in a hardware operating environment involved in an embodiment of the present invention.

[0068] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0069] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0070] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0071] Based on this, the embodiment of the present invention provides a reliability analysis method for a steam generating tube, referring to Figure 1 , Figure 1 The figure is a flow chart of a first embodiment of a reliability analysis method for a steam generating tube according to the present invention.

[0072] In this embodiment, the reliability analysis method of the steam generating tube includes:

[0073] Step S10: constructing a one-dimensional simulation model of the steam generating tube through a preset modeling database.

[0074] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a control computer or a cloud server, etc. The following takes the control computer as an example to illustrate this embodiment and the following embodiments.

[0075] It should be noted that in traditional technology, the operational reliability analysis of the steam generator tube is mainly carried out by testing to obtain the thermal-hydraulic parameters of the steam generator tube under the task conditions. However, the test cycle is long and the cost is high, the combination of test condition parameters is limited, and the test measurement technology is limited to capture the flow mechanism phenomenon inside the steam generator tube. As a result, the operational reliability analysis of the steam generator tube is not effective, the analysis workload is large, and it is difficult to directly view the composition of the thermal components and the connection relationship between the components, resulting in poor visibility.

[0076] Based on this, this embodiment performs one-dimensional modeling and three-dimensional modeling on the steam generating tube respectively to obtain multiple dimensional data of the steam generating tube, so as to realize reliability analysis of the operation data of the steam generating tube.

[0077] It can be understood that the preset modeling database refers to the NUMAP thermal-hydraulic model library, which is a model library used for the analysis of nuclear reactor thermal-hydraulic systems. The NUMAP thermal-hydraulic model library is described using two-fluid six equations. The two-fluid six equations take into account the different properties of the vapor and liquid phases, and establish mass, momentum and energy conservation equations for the vapor phase and liquid phase respectively.

[0078] Furthermore, the one-dimensional simulation model of the steam generating tube is constructed by using a preset modeling database, including:

[0079] Obtaining parameterized variables of the steam generating tube;

[0080] Constructing a vapor-liquid two-phase nonlinear equation system based on the parameterized variables;

[0081] Solving the vapor-liquid two-phase nonlinear equation group by presetting a constitutive closed equation model to obtain a plurality of model structure parameters;

[0082] A one-dimensional simulation model of the steam generating tube is constructed according to the multiple model structure parameters through a preset modeling database.

[0083] In the specific implementation, the vapor-liquid mass, momentum, and energy conservation equations are as follows:

[0084]

[0085] Where, k represents the vapor phase g or the liquid phase f; i represents the interface; α represents the volume percentage; μ represents the flow rate; h represents the enthalpy value; Γk represents interfacial mass transfer; F wk represents wall friction; F ik Represents interface friction; F a Represents the external force field; q ik represents the interfacial heat transfer; q wk represents wall heat transfer; Γ k 、F wk 、F ik 、F a ,q ik ,q wk are all unknown parameters of the model structure.

[0086] Specifically, refer to Figure 2 , Figure 2 It is a schematic diagram of the architecture of the one-dimensional simulation model of the steam generating tube in this embodiment, wherein the one-dimensional simulation model includes at least conventional pipeline components, inlet flow boundary, outlet pressure boundary, control body model, connecting pipe model, outer side thermal component model, double-side thermal component model and other component models.

[0087] Step S20: performing simulation analysis using the one-dimensional simulation model to obtain a one-dimensional simulation analysis result.

[0088] It should be understood that the one-dimensional simulation analysis results include but are not limited to the temperature distribution, pressure distribution, flow curve, steam content and other data of the steam generating tube. Figure 3 In this embodiment, the various data in the one-dimensional simulation analysis results can be integrated into a simulation result curve, and the simulation structure curve is used to characterize the change trend of the steam / liquid phase temperature on the primary side of the steam generating tube.

[0089] Step S30: constructing a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube.

[0090] The parameterized variables of the steam generating tube include but are not limited to the structural variable data sample S, the environmental variable data sample E, and the material variable data sample M.

[0091] Further, constructing a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube comprises:

[0092] Generate a working condition related variable parameter command stream according to the parameterized variables and the one-dimensional simulation analysis results;

[0093] Constructing a parametric auxiliary engineering model for finite element analysis of the steam generating tube based on the operating condition related variable parameter command stream and by using preset parametric design rules;

[0094] Generate a finite element solution parametric command stream based on preset parametric design rules to update the configuration parameters of each solver in the parametric auxiliary engineering model;

[0095] Generate a finite element analysis file in a preset format according to the finite element solution parameterized command stream and the working condition related variable parameter command stream;

[0096] A three-dimensional simulation analysis model of the steam generating tube is constructed based on the finite element analysis file.

[0097] In this embodiment, the preset parametric design rules refer to ANSYS parametric design language (APDL), and may also be other parametric design rules that can realize the construction of parametric computer aided engineering models (CAE), and this embodiment does not impose specific restrictions on this.

[0098] In the specific implementation, in order to build a three-dimensional simulation analysis model of the steam generator tube, the API data interface can be used to transmit the data of the one-dimensional simulation analysis results, that is, the calculation results of the thermal-hydraulic characteristics of the steam generator tube to the parametric joint simulation module, and the structural parameterized command stream, environmental parameterized command stream, and material parameterized command stream in the parameterized variables are combined with the one-dimensional model simulation analysis result (as a boundary condition) data stream to form a working condition related variable parameter command stream. The parametric CAE model construction of the finite element analysis of the steam generator tube is completed by using the ANSYS parametric design language (APDL). The finite element solution parameterized command stream of the three-dimensional simulation model analysis of the steam generator tube is written based on the APDL language, and the solver variables such as control parameters and numerical discretization parameters are set. Combined with the working condition related variable parameter command stream, an APDL format file of the finite element analysis is formed to complete the construction of the three-dimensional simulation analysis model of the steam generator tube.

[0099] Step S40: performing finite element analysis using the three-dimensional simulation analysis model to obtain finite element results of the steam generating tube.

[0100] It should be noted that the finite element results of the steam generating tube specifically refer to the finite element results including the response data of the steam generating tube such as stress, strain, and temperature.

[0101] Step S50: performing reliability analysis on the steam generating tube according to the finite element results and the corresponding failure physical model to obtain reliability analysis results of the steam generating tube.

[0102] It should be noted that the failure physics model includes but is not limited to high-cycle fatigue analysis model, low-cycle fatigue analysis model and creep fatigue analysis model, and according to the different fatigue failure models, at least one fatigue analysis model can be adopted, that is, for different fatigue failure modes such as high cycle, low cycle, creep, etc., high cycle, low cycle, and creep fatigue analysis models are respectively selected to construct a single-mode fatigue life analysis model; for compound fatigue failure modes, a multi-mode fatigue life model is constructed.

[0103] In this embodiment, a one-dimensional simulation model of the steam generating tube is first constructed, and a one-dimensional simulation analysis is performed to intuitively obtain the composition, connection relationship and parameter information of the steam generating tube, and a three-dimensional simulation model is constructed in combination with the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube. Finally, a finite element analysis is performed through the three-dimensional simulation analysis model, so that the operation data of the steam generating tube in multiple dimensions are analyzed for reliability, which reduces the difficulty of simulation analysis of the steam generating tube, improves the efficiency of reliability analysis of the steam generating tube, and avoids the technical problem that, when performing reliability analysis on the steam generating tube in the prior art, the gas flow in the steam generating tube cannot be captured, resulting in poor operation reliability analysis effect of the steam generating tube and a large analysis workload.

[0104] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 4 , step S20, comprising:

[0105] Step S201: obtaining parameterized variables of the steam generating tube.

[0106] Step S202: configuring model parameters of the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model.

[0107] Step S203: performing simulation analysis using the target one-dimensional simulation model to obtain a one-dimensional simulation analysis result.

[0108] It should be noted that the parameterized variables of the steam generating tube include at least: structural variable data samples, environmental variable data samples and material variable data samples. In this embodiment, the structural variable data samples and environmental variable data samples extracted by the PYTHON controller are transmitted to the NUMAP modeling module through a batch parameter transfer command stream, thereby completing the component parameter configuration of the one-dimensional simulation system model of the steam generating tube.

[0109] Further, the parameterized variables include at least structural parameter variables and environmental parameter variables;

[0110] The step of configuring the model parameters of the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model includes:

[0111] The structural parameter variables and the environmental parameter variables are transmitted to the NUMAP modeling module through a batch parameter transmission command stream;

[0112] The NUMAP modeling module is used to configure parameters of each subcomponent in the one-dimensional simulation model to obtain a target one-dimensional simulation model.

[0113] Specifically, the configuration process can be to set the parameters such as pipeline flow area, hydraulic diameter, inlet and outlet elevation and number of segments for pipeline components; set the parameters such as thermal component inner diameter, axial length, number of segments for thermal components. For the inlet flow boundary, set the flow value and fluid pressure parameters; for the control body model, also set the flow area, hydraulic diameter, inlet and outlet elevation parameters; for the takeover model, set the initial liquid phase, vapor phase velocity parameters; for the outlet pressure boundary model, set the pressure, temperature and other parameters.

[0114] Based on the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the first embodiment can be referred to the above description, and no further description will be given later. Figure 5 , step S40, comprising:

[0115] Step S401: In response to a structural analysis result extraction instruction, extract finite element response data from the finite element results.

[0116] Step S402: determining the fatigue failure mode of the steam generating tube and the target failure physical model corresponding to the fatigue failure mode according to the finite element response data.

[0117] Step S403: Calculating the target fatigue life of the steam generating tube according to the finite element response data through the target failure physical model.

[0118] Step S404: generating an operating life reliability analysis result of the steam generating tube according to the target fatigue life.

[0119] It should be noted that the structural analysis result extraction instruction is used to drive the three-dimensional simulation analysis model to perform three-dimensional simulation calculations, and use Python language commands to extract the structural analysis results to obtain finite element response data such as stress, strain, temperature and other response data of the steam generator tube as input data for subsequent reliability evaluation.

[0120] When selecting a failure physical model, you can select it based on the category and compound type of the fatigue failure mode of the steam generator tube. For example, for the fatigue reliability analysis of the steam generator tube, according to the load and structural response of the steam generator tube, determine the fatigue failure mode of the steam generator tube and select the corresponding failure physical model. For different fatigue failure modes such as high-cycle, low-cycle, and creep, respectively select high-cycle, low-cycle, and creep fatigue analysis models to construct a single-mode fatigue life analysis model; for compound fatigue failure modes, construct a multi-mode fatigue life model.

[0121] Specifically, the calculation formulas for high-cycle, low-cycle, and creep fatigue probability life are as follows:

[0122]

[0123] In the above calculation formula, a i (i=1,2...8) is the parameter to be estimated, which can be solved by linear regression method, ε a and σ m are the strain amplitude and average stress obtained by finite element calculation, σ h is the load-keeping stress, σ bm and K are correction parameters, u H ,u L ,u C is a standard normal auxiliary random variable, N H 、N L 、T c They represent high cycle, low cycle and creep fatigue life under single-stage cyclic loading respectively.

[0124] Further, generating the operating life reliability analysis result of the steam generating tube according to the target fatigue life includes:

[0125] Constructing a limit state function of the steam generating tube;

[0126] Determine the fatigue life threshold under each fatigue failure mode by using the limit state function;

[0127] Calculating the operating life reliability of the steam generating tube according to the fatigue life threshold value and the target reliability analysis model under each fatigue failure mode and the target fatigue probability life;

[0128] An operating life reliability analysis result of the steam generating tube is generated according to the operating life reliability.

[0129] In the specific implementation, refer to Figure 6The operating life of the steam generator tube obtained through simulation analysis is affected by the simulation data and has a difference with the fatigue life of the actual steam generator tube. In order to improve the accuracy of the simulation model in predicting the steam generator tube, this embodiment can construct a limit state function for the reliability analysis of the steam generator tube and calculate the reliability of the steam generator tube, and then determine whether the limit state function converges, thereby determining the accuracy of the reliability analysis of the steam generator tube life.

[0130] Further, the calculation of the operating life reliability of the steam generating tube according to the fatigue life threshold value and the target reliability analysis model under each fatigue failure mode and the target fatigue probability life includes:

[0131] Sampling the target fatigue probability life under each fatigue failure mode to obtain a target fatigue probability life sample;

[0132] Calculate the reliability index under each fatigue failure mode according to the fatigue life threshold and the target fatigue probability life;

[0133] determining a target failure indication indicator according to the reliability indicator;

[0134] The operating life reliability of the steam generating tube is calculated according to the target fatigue probability life sample and the target failure indication index.

[0135] Specifically, the fatigue probability life N under a single-stage load is obtained by the above fatigue probability life calculation formula: i Based on Miner's linear cumulative damage theory, the fatigue life N of the steam generator tube under multi-stage cyclic load is calculated. f , the calculation formula is as follows:

[0136]

[0137] Among them, D i represents the fatigue life of the structure under the single-stage cyclic load of the i-th mission section, n i represents the number of single-stage cyclic load actions, D is the cumulative damage under multi-stage mission profiles, and the total fatigue life N f is equal to the inverse of the total damage, that is

[0138]

[0139] Among them, N f is the fatigue life of the steam generating tube under multi-stage cyclic loading.

[0140] According to the fatigue failure mode of the steam generating tube, the fatigue life design threshold of the steam generating tube is The reliability index g for the fatigue failure mode of the steam generating tube is expressed as follows:

[0141]

[0142] After determining the reliability index of the fatigue failure mode of the steam generating tube, based on the Python random number generator, according to N f The fatigue life samples are extracted from the distribution, and the reliability R of the steam generating tube is calculated by Monte Carlo digital simulation method. The calculation formula is as follows:

[0143] R=1-I g / N

[0144] In the above formula, I g is the failure indicator function of the timeliness index g. When g≤0, I g =1, otherwise I g =0.

[0145] Further, determining the target failure indication indicator according to the reliability indicator includes:

[0146] When the reliability index is less than or equal to a preset threshold, determining the target failure indication index to be a first threshold;

[0147] When the reliability index is greater than a preset threshold, the target failure indication index is determined to be a second threshold, and the second threshold is less than the first threshold.

[0148] It can be understood that the first threshold is preferably 1, and the second threshold is preferably 0.

[0149] This embodiment extracts finite element response data from the finite element results in response to a structural analysis result extraction instruction; determines the fatigue failure mode of the steam generating tube and the target failure physical model corresponding to the fatigue failure mode according to the finite element response data; calculates the target fatigue life of the steam generating tube through the target failure physical model according to the finite element response data; generates an operating life reliability analysis result of the steam generating tube according to the target fatigue life, calculates the target fatigue life of the steam generating tube by selecting the target failure physical model corresponding to the fatigue failure mode of the steam generating tube, and then determines the reliability of the steam generating tube by calculating the failure index of the steam generating tube, thereby improving the accuracy of the reliability judgment of the steam generating tube.

[0150] The present application also provides a reliability analysis device for a steam generating tube, please refer to Figure 7 , the reliability analysis device of the steam generating tube comprises:

[0151] The one-dimensional construction module 10 is used to construct a one-dimensional simulation model of the steam generating tube through a preset modeling database.

[0152] The one-dimensional analysis module 20 is used to perform simulation analysis using the one-dimensional simulation model to obtain a one-dimensional simulation analysis result.

[0153] The three-dimensional construction module 30 is used to construct a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube.

[0154] The finite element model analysis module 40 is used to perform finite element analysis through the three-dimensional simulation analysis model to obtain finite element results of the steam generating pipe.

[0155] The reliability analysis module 50 is used to perform reliability analysis on the steam generating tube according to the finite element results and the corresponding failure physical model to obtain the reliability analysis result of the steam generating tube.

[0156] In this embodiment, a one-dimensional simulation model of the steam generating tube is first constructed, and a one-dimensional simulation analysis is performed to intuitively obtain the composition, connection relationship and parameter information of the steam generating tube, and a three-dimensional simulation model is constructed in combination with the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube. Finally, a finite element analysis is performed through the three-dimensional simulation analysis model, so that the operation data of the steam generating tube in multiple dimensions are analyzed for reliability, which reduces the difficulty of simulation analysis of the steam generating tube, improves the efficiency of reliability analysis of the steam generating tube, and avoids the technical problem that, when performing reliability analysis on the steam generating tube in the prior art, the gas flow in the steam generating tube cannot be captured, resulting in poor operation reliability analysis effect of the steam generating tube and a large analysis workload.

[0157] In one embodiment, the one-dimensional construction module 10 is also used to construct a vapor-liquid two-phase nonlinear equation group based on parameterized variables; solve the vapor-liquid two-phase nonlinear equation group through a preset constitutive closed equation model to obtain multiple model structure parameters; and construct a one-dimensional simulation model of the steam generating tube through a preset modeling database based on the multiple model structure parameters.

[0158] In one embodiment, the one-dimensional analysis module 20 is also used to obtain parameterized variables of the steam generating tube; configure model parameters of the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model; and perform simulation analysis through the target one-dimensional simulation model to obtain a one-dimensional simulation analysis result.

[0159] In one embodiment, the one-dimensional analysis module 20 is also used to configure the model parameters of the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model, including: transmitting the structural parameter variables and the environmental parameter variables to the NUMAP modeling module through a batch parameter transfer command stream; and configuring the parameters of each sub-component in the one-dimensional simulation model through the NUMAP modeling module to obtain a target one-dimensional simulation model.

[0160] In one embodiment, the three-dimensional construction module 30 is also used to generate a working condition-related variable parameter command stream based on the parameterized variables and the one-dimensional simulation analysis results; based on the working condition-related variable parameter command stream, a parametric auxiliary engineering model of the finite element analysis of the steam generator tube is constructed through preset parametric design rules; based on the preset parametric design rules, a finite element solution parameter command stream is generated to update the configuration parameters of each solver in the parameterized auxiliary engineering model; a finite element analysis file in a preset format is generated according to the finite element solution parameter command stream and the working condition-related variable parameter command stream; and a three-dimensional simulation analysis model of the steam generator tube is constructed based on the finite element analysis file.

[0161] In one embodiment, the finite element model analysis module 40 is further used to extract finite element response data from the finite element results in response to a structural analysis result extraction instruction; determine the fatigue failure mode of the steam generating tube and the target failure physical model corresponding to the fatigue failure mode according to the finite element response data; calculate the target fatigue life of the steam generating tube through the target failure physical model according to the finite element response data; and generate an operating life reliability analysis result of the steam generating tube according to the target fatigue life.

[0162] In one embodiment, the finite element model analysis module 40 is also used to construct a limit state function of the steam generating tube; determine the fatigue life threshold under each fatigue failure mode through the limit state function; calculate the operating life reliability of the steam generating tube according to the fatigue life threshold under each fatigue failure mode and the target reliability analysis model, and the target fatigue probability life; and generate an operating life reliability analysis result of the steam generating tube according to the operating life reliability.

[0163] In one embodiment, the finite element model analysis module 40 is also used to sample the target fatigue probability life under each fatigue failure mode to obtain a target fatigue probability life sample; calculate the reliability index under each fatigue failure mode according to the fatigue life threshold and the target fatigue probability life; determine the target failure indication index according to the reliability index; calculate the operating life reliability of the steam generator tube according to the target fatigue probability life sample and the target failure indication index.

[0164] In one embodiment, the finite element model analysis module 40 is also used to determine that the target failure indication indicator is a first threshold when the reliability index is less than or equal to a preset threshold; when the reliability index is greater than the preset threshold, determine that the target failure indication indicator is a second threshold, and the second threshold is less than the first threshold.

[0165] The present application provides a reliability analysis device for a steam generating tube, the reliability analysis device for the steam generating tube comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the reliability analysis method for the steam generating tube in the above-mentioned embodiment 1.

[0166] Reference below Figure 8 , which shows a schematic diagram of the structure of a reliability analysis device for a steam generating tube suitable for implementing an embodiment of the present application. The reliability analysis device for a steam generating tube in an embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 8 The reliability analysis device for the steam generating tube shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0167] like Figure 8As shown, the reliability analysis device of the steam generating pipe may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the reliability analysis device of the steam generating pipe are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 may allow the reliability analysis device of the steam generating tube to communicate with other devices wirelessly or by wire to exchange data. Although the reliability analysis device of the steam generating tube with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0168] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0169] The reliability analysis device for the steam generating tube provided in the present application adopts the reliability analysis method for the steam generating tube in the above embodiment, and can solve the technical problem of reliability analysis of the steam generating tube. Compared with the prior art, the beneficial effect of the reliability analysis device for the steam generating tube provided in the present application is the same as the beneficial effect of the reliability analysis method for the steam generating tube provided in the above embodiment, and the other technical features in the reliability analysis device for the steam generating tube are the same as the features disclosed in the method of the previous embodiment, and will not be repeated here.

[0170] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0171] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0172] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the reliability analysis method of the steam generating tube in the above-mentioned embodiment.

[0173] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0174] The computer-readable storage medium may be included in the reliability analysis device for the steam generating tube; or may exist independently without being assembled into the reliability analysis device for the steam generating tube.

[0175] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the reliability analysis device for the steam generation pipe, the reliability analysis device for the steam generation pipe performs reliability analysis of the steam generation pipe.

[0176] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0177] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0178] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0179] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned reliability analysis method of the steam generating tube, and can solve the technical problem of reliability analysis of the steam generating tube. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the reliability analysis method of the steam generating tube provided in the above-mentioned embodiment, and will not be described in detail here.

[0180] The present application also provides a computer program product, including a computer program, which implements the steps of the reliability analysis method of the steam generating tube as described above when the computer program is executed by a processor.

[0181] The computer program product provided in this application can solve the technical problem of reliability analysis of steam generating tubes. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the reliability analysis method of steam generating tubes provided in the above embodiment, which will not be described in detail here.

[0182] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A reliability analysis method for a steam generating tube, characterized in that: The reliability analysis method of the steam generating tube comprises: Constructing a one-dimensional simulation model of the steam generating tube by using a preset modeling database; Perform simulation analysis through the one-dimensional simulation model to obtain a one-dimensional simulation analysis result; Constructing a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube; Performing finite element analysis through the three-dimensional simulation analysis model to obtain finite element results of the steam generating tube; A reliability analysis is performed on the steam generating tube according to the finite element results and the corresponding failure physical model to obtain a reliability analysis result of the steam generating tube.

2. The method according to claim 1, characterized in that The one-dimensional simulation model of the steam generating tube is constructed by using a preset modeling database, comprising: Obtaining parameterized variables of the steam generating tube; Constructing a vapor-liquid two-phase nonlinear equation system based on the parameterized variables; Solving the vapor-liquid two-phase nonlinear equation group by presetting a constitutive closed equation model to obtain a plurality of model structure parameters; A one-dimensional simulation model of the steam generating tube is constructed according to the multiple model structure parameters through a preset modeling database.

3. The method according to claim 1, characterized in that The one-dimensional simulation model is used to perform simulation analysis to obtain a one-dimensional simulation analysis result, including: Obtaining parameterized variables of the steam generating tube; Performing model parameter configuration on the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model; A simulation analysis is performed using the target one-dimensional simulation model to obtain a one-dimensional simulation analysis result.

4. The method according to claim 3, characterized in that The parameterized variables include at least structural parameter variables and environmental parameter variables; The step of configuring the model parameters of the one-dimensional simulation model based on the parameterized variables to obtain a target one-dimensional simulation model includes: The structural parameter variables and the environmental parameter variables are transmitted to the NUMAP modeling module through a batch parameter transmission command stream; The NUMAP modeling module is used to configure parameters of each subcomponent in the one-dimensional simulation model to obtain a target one-dimensional simulation model.

5. The method according to claim 1, characterized in that The constructing of the three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube comprises: Generate a working condition related variable parameter command stream according to the parameterized variables and the one-dimensional simulation analysis results; Constructing a parametric auxiliary engineering model for finite element analysis of the steam generating tube based on the operating condition related variable parameter command stream and by using preset parametric design rules; Generate a finite element solution parametric command stream based on preset parametric design rules to update the configuration parameters of each solver in the parametric auxiliary engineering model; Generate a finite element analysis file in a preset format according to the finite element solution parameterized command stream and the working condition related variable parameter command stream; A three-dimensional simulation analysis model of the steam generating tube is constructed based on the finite element analysis file.

6. The method according to claim 1, characterized in that The reliability analysis of the steam generating tube is performed according to the finite element result and the corresponding failure physical model to obtain the reliability analysis result of the steam generating tube, including: In response to a structural analysis result extraction instruction, extracting finite element response data from the finite element results; Determining a fatigue failure mode of the steam generating tube and a target failure physical model corresponding to the fatigue failure mode according to the finite element response data; Calculating the target fatigue life of the steam generating tube by using the target failure physical model according to the finite element response data; A reliability analysis result of the steam generating tube is generated according to the target fatigue life.

7. The method according to claim 6, characterized in that Generating the reliability analysis result of the steam generating tube according to the target fatigue life includes: Constructing a limit state function of the steam generating tube; Determine the fatigue life threshold under each fatigue failure mode by using the limit state function; Calculating the reliability of the steam generating tube according to the fatigue life threshold value and the target reliability analysis model under each fatigue failure mode and the target fatigue probability life; A reliability analysis result of the steam generating tube is generated according to the operating life reliability.

8. The method according to claim 7, characterized in that The calculating the reliability of the steam generating tube according to the fatigue life threshold value and the target reliability analysis model under each fatigue failure mode and the target fatigue probability life includes: Sampling the target fatigue probability life under each fatigue failure mode to obtain a target fatigue probability life sample; Calculate the reliability index under each fatigue failure mode according to the fatigue life threshold and the target fatigue probability life; determining a target failure indication indicator according to the reliability indicator; The reliability of the steam generating tube is calculated according to the target fatigue probability life sample and the target failure indication index.

9. The method according to claim 8, characterized in that Determining a target failure indication indicator according to the reliability indicator includes: When the reliability index is less than or equal to a preset threshold, determining the target failure indication index to be a first threshold; When the reliability index is greater than a preset threshold, the target failure indication index is determined to be a second threshold, and the second threshold is less than the first threshold.

10. A reliability analysis device for a steam generating tube, characterized in that: The reliability analysis device of the steam generating tube comprises: A one-dimensional construction module, used to construct a one-dimensional simulation model of the steam generating tube through a preset modeling database; A one-dimensional analysis module, used to perform simulation analysis through the one-dimensional simulation model to obtain a one-dimensional simulation analysis result; A three-dimensional construction module, used to construct a three-dimensional simulation analysis model of the steam generating tube according to the one-dimensional simulation analysis result and the parameterized variables of the steam generating tube; A finite element model analysis module, used for performing finite element analysis through the three-dimensional simulation analysis model to obtain finite element results of the steam generating tube; The reliability analysis module is used to perform reliability analysis on the steam generating tube according to the finite element results and the corresponding failure physical model to obtain the reliability analysis result of the steam generating tube.

11. A reliability analysis device for a steam generating tube, characterized in that: The reliability analysis device of the steam generating tube comprises: a memory, a processor, and a reliability analysis program of the steam generating tube stored in the memory and executable on the processor, wherein the reliability analysis program of the steam generating tube is configured to implement the steps of the reliability analysis method of the steam generating tube as described in any one of claims 1 to 10.

12. A storage medium, characterized in that: The storage medium stores a reliability analysis program for a steam generating tube, and when the reliability analysis program for a steam generating tube is executed by a processor, the steps of the reliability analysis method for a steam generating tube according to any one of claims 1 to 10 are implemented.

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