Fluctuation pipe analysis method and device, computer equipment, readable storage medium and program product

Abstract

The invention relates to a fluctuation pipe analysis method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring respective pipeline arrangement modes of a plurality of candidate surge pipes; for each candidate fluctuation pipe, determining a candidate fluctuation pipe model matched with the pipeline arrangement mode of the candidate fluctuation pipe; performing thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model, and determining a thermal stratification effect of the candidate surge pipe; performing stress analysis on the candidate surge pipe based on the candidate surge pipe model, and determining the stress effect of the candidate surge pipe; and performing performance analysis on each surge pipe based on each thermal stratification effect and each stress effect, and determining a selected surge pipe from each candidate surge pipe. By adopting the method, the stability of the voltage stabilizing system can be improved.

Description

Technical Field

[0001] The present application relates to the field of nuclear power technology, and in particular to a surge tube analysis method, device, computer equipment, computer-readable storage medium, and computer program product. Background Art

[0002] With the development of nuclear power technology, a nitrogen pressure stabilization scheme has emerged, which has the functions of pressure control, volume compensation and passive core emergency cooling. The surge pipe in the nitrogen pressure stabilization system is used to connect the fluid in the pressurizer and the pressure vessel descending section. It is the main fluid transmission pipeline for the pressurizer to control the primary circuit pressure and is one of the important nuclear safety Class I pipelines in nuclear power plants.

[0003] In traditional technology, when pressure control is performed, there is a large difference in temperature and density between the fluid from the nitrogen pressure-stabilizing tube and the fluid from the pressure vessel in the surge tube. Therefore, thermal stratification will form in the surge tube, posing a threat to the structural integrity of the surge tube and causing unstable pressure stabilization. Summary of the invention

[0004] Based on this, it is necessary to provide a surge tube analysis method, device, computer equipment, computer-readable storage medium and computer program product that can improve voltage stabilization stability in response to the above technical problems.

[0005] In a first aspect, the present application provides a surge tube analysis method, comprising:

[0006] Obtain respective pipeline arrangements of a plurality of candidate surge pipes;

[0007] For each of the candidate surge pipes, determining a candidate surge pipe model that matches the pipeline arrangement of the candidate surge pipe;

[0008] Performing a thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine a thermal stratification effect of the candidate surge pipe;

[0009] Performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine stress effects of the candidate surge tube;

[0010] The performance of each of the surge tubes is analyzed based on the thermal stratification effects and the stress effects, and a selected surge tube is determined from among the candidate surge tubes.

[0011] In one embodiment, performing a thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe includes:

[0012] Splitting the candidate surge pipe model to obtain a plurality of candidate surge pipe sub-models;

[0013] For each of the candidate surge pipe models, when the candidate surge pipe model is in a simulation operation stage, determining a pipe temperature difference between a top pipe and a bottom pipe in the candidate surge pipe model;

[0014] Based on the temperature differences of the pipelines, the thermal stratification effect of the candidate surge pipe is determined.

[0015] In one embodiment, determining the thermal stratification effect of the candidate surge pipe based on the temperature difference of each pipeline includes:

[0016] For each of the candidate surge pipe models, obtaining pipeline layout data corresponding to the candidate surge pipe model;

[0017] Performing data analysis based on the pipeline layout data and the pipeline temperature difference to determine the degree of thermal stratification of the candidate surge pipe model;

[0018] Based on the respective thermal stratification degrees, a thermal stratification effect of the candidate surge tube is determined.

[0019] In one embodiment, performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress effect of the candidate surge tube includes:

[0020] Performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine a stress nephogram corresponding to the candidate surge tube model;

[0021] Based on the stress distribution in the stress cloud map, the stress effect of the candidate surge tube is determined.

[0022] In one embodiment, determining the stress effect of the candidate surge tube based on the stress distribution in the stress cloud map includes:

[0023] Performing cross-sectional cutting on the node with the largest stress in the stress cloud diagram to obtain a cross-sectional cloud diagram corresponding to the node;

[0024] Performing stress analysis on the cross-sectional cloud image to determine the stress value corresponding to the point cloud;

[0025] Based on the numerical value of the stress value, the stress effect of the candidate surge tube is determined.

[0026] In one embodiment, the method further comprises:

[0027] Adjusting the surge pipe parameters of the selected surge pipe respectively according to the preset multiple parameter change values ​​to obtain multiple updated surge pipes corresponding to the selected surge pipe;

[0028] Based on the adjusted surge tube parameters, a corresponding updated surge tube model is established for each of the updated surge tubes;

[0029] For each of the updated surge pipe models, thermal stratification analysis and stress analysis are respectively performed on the updated surge pipe model to determine an updated thermal stratification effect and an updated stress effect of the updated surge pipe model;

[0030] The performance of each of the updated surge tubes is analyzed based on the thermal stratification effects and the stress effects, and a target surge tube is determined from among the updated surge tubes.

[0031] In a second aspect, the present application also provides a surge tube analysis device, comprising:

[0032] A layout acquisition module is used to acquire the pipeline layout of each of the plurality of candidate surge pipes;

[0033] A surge pipe model determination module is used to determine, for each candidate surge pipe, a candidate surge pipe model that matches the pipeline arrangement of the candidate surge pipe;

[0034] A thermal stratification analysis module, used to perform thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe;

[0035] A stress analysis module, configured to perform stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress effect of the candidate surge tube;

[0036] A performance analysis module is used to perform performance analysis on each of the surge tubes based on each of the thermal stratification effects and each of the stress effects, and to determine a selected surge tube from each of the candidate surge tubes.

[0037] In a third aspect, the present application further provides a computer device, wherein the computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the above method are implemented.

[0038] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0039] In a fifth aspect, the present application further provides a computer program product, wherein the computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0040] The above-mentioned surge pipe analysis method, device, computer equipment, computer-readable storage medium and computer program product obtain the respective pipeline layout modes of multiple candidate surge pipes, and can determine the pipeline layout conditions corresponding to each candidate surge pipe. For each candidate surge pipe, a candidate surge pipe model matching the pipeline layout mode of the candidate surge pipe is determined, and a thermal stratification analysis is performed on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe. A stress analysis is performed on the candidate surge pipe based on the candidate surge pipe model to determine the stress effect of the candidate surge pipe. The thermal stratification effect and stress effect of each candidate surge pipe can be determined based on model simulation. Finally, a performance analysis is performed on each surge pipe based on each thermal stratification effect and each stress effect, and a selected surge pipe is determined from each candidate surge pipe. Finally, a surge pipe with the best thermal stratification suppression effect and the smallest stress pressure can be selected as the surge pipe of the voltage stabilization system, thereby improving the stability of the voltage stabilization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A diagram showing an application environment of a surge tube analysis method in one embodiment;

[0043] Figure 2 A schematic diagram of a flow chart of a surge tube analysis method in one embodiment;

[0044] Figure 3 is a schematic diagram of a non-circular pipeline arrangement in one embodiment;

[0045] Figure 4 A schematic diagram of a horizontally encircling pipeline arrangement in one embodiment;

[0046] Figure 5 A schematic diagram of an arrangement of surrounding rising pipes in one embodiment;

[0047] Figure 6 A schematic diagram of an arrangement of surrounding descending pipes in one embodiment;

[0048] Figure 7 A schematic diagram of a pipeline arrangement in a cross shape in one embodiment;

[0049] Figure 8 A schematic diagram of a surge tube splitting process in one embodiment;

[0050] Fig. 9 A schematic diagram of a flow chart of a surge tube analysis step in an embodiment;

[0051] Fig.10 A schematic diagram of a surge tube cross section in a surge tube analysis step in one embodiment;

[0052] Fig.11 is a schematic diagram of a target surge tube in one embodiment;

[0053] Fig.12 A schematic diagram of a flow chart of a surge tube analysis method in another embodiment;

[0054] Fig.13 is a structural block diagram of a surge tube analysis device in one embodiment;

[0055] Fig.14 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] The surge tube analysis method provided in the embodiment of the present application can be applied to Figure 1In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. Among them, the terminal 102 can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car devices, projection devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The head-mounted device can be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc. Specifically, the terminal 102 can include an image acquisition device or other acquisition device for collecting the pipeline layout information of each candidate surge pipe and determining the pipeline layout method based on the pipeline layout information. The server 104 can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides cloud computing services. Specifically, during the process of performing the surge pipe analysis, the server 104 obtains the respective pipeline layouts of multiple candidate surge pipes from the terminal 102; for each candidate surge pipe, a candidate surge pipe model that matches the pipeline layout of the candidate surge pipe is determined; based on the candidate surge pipe model, a thermal stratification analysis is performed on the candidate surge pipe to determine the thermal stratification effect of the candidate surge pipe; based on the candidate surge pipe model, a stress analysis is performed on the candidate surge pipe to determine the stress effect of the candidate surge pipe; based on each thermal stratification effect and each stress effect, a performance analysis is performed on each surge pipe, and a selected surge pipe is determined from each candidate surge pipe.

[0058] In an exemplary embodiment, Figure 2 As shown, a surge tube analysis method is provided, which can be applied to Figure 1 The server 104 in the example is used as an example to illustrate the method, which includes the following steps S202 to S210. Among them:

[0059] Step S202, obtaining the pipeline layout of each of the plurality of candidate surge pipes.

[0060] The candidate surge pipe refers to a surge pipe waiting to be selected, and can also be understood as an alternative surge pipe. The pipeline layout method refers to the specific layout method of the pipeline of the surge pipe.

[0061] Specifically, during the surge pipe analysis process, the server needs to first determine multiple candidate surge pipes and obtain the pipeline layout of each candidate surge pipe to determine the pipeline layout of each candidate surge pipe. For example, in this embodiment, the pipeline layout of the surge pipe includes non-circular, horizontally circling, circling up, circling down, and an X-shaped layout. Figure 3-7 As shown, Figure 3 This is a schematic diagram of a non-circular pipe arrangement. Figure 4 This is a schematic diagram of the horizontally encircling pipeline arrangement. Figure 5 This is a schematic diagram of the arrangement of the surrounding rising pipes. Figure 6 A schematic diagram of the arrangement of the surrounding descending pipes. Figure 7 This is a schematic diagram of the pipeline layout arranged in the shape of a "J".

[0062] Step S204: for each candidate surge pipe, determine a candidate surge pipe model that matches the pipeline layout of the candidate surge pipe.

[0063] The candidate surge tube model refers to a virtual model obtained after the candidate surge tube is simulated in a specific manner.

[0064] Specifically, after determining the pipeline layout of each candidate surge pipe, a corresponding candidate surge pipe model may be matched to each candidate surge pipe based on the pipeline layout, so as to subsequently analyze the candidate surge pipe based on the candidate surge pipe model.

[0065] Step S206: performing a thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe.

[0066] The thermal stratification effect refers to the thermal stratification of the candidate surge pipe under typical operating conditions. It can be understood that the more severe the thermal stratification effect is, the easier it is for the candidate surge pipe to be thermally stratified under typical operating conditions, that is, the pipeline layout of the candidate surge pipe does not maintain the stability of the pressure stabilization system.

[0067] Specifically, after determining the candidate surge pipe model corresponding to each candidate surge pipe, the server can perform thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe. In some specific embodiments, since the pipeline arrangement of the candidate surge pipe may involve the setting of bends and pipeline angles, the server will split each candidate surge pipe model and perform thermal stratification analysis on the multiple candidate surge pipe sub-models after the splitting.

[0068] Step S208: performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress effect of the candidate surge tube.

[0069] Among them, when an object is deformed due to external factors (such as force, humidity change, temperature field change, etc.), the internal force of interaction between the parts of the object is generated, and the internal force acting on the unit area is called stress. The stress effect refers to the effect of the stress magnitude borne by the candidate surge pipe. It can be understood that the greater the stress effect, the greater the stress borne by the candidate surge pipe, that is, the pipeline layout of the candidate surge pipe does not maintain the stability of the voltage stabilization system.

[0070] Specifically, after determining the candidate surge pipe model corresponding to each candidate surge pipe, the server can perform stress analysis on the candidate surge pipe based on the candidate surge pipe model to determine the stress effect of the candidate surge pipe. In a specific embodiment, the server can perform stress analysis on the candidate surge pipe based on the candidate surge pipe model, determine the stress cloud map corresponding to the candidate surge pipe model, and determine the stress effect of the candidate surge pipe based on the stress distribution in the stress cloud map. In another specific embodiment, the server can also pre-set a stress effect analysis model, perform stress analysis on the candidate surge pipe based on the stress effect analysis model, and determine the stress effect of the candidate surge pipe.

[0071] Step S210 , analyzing the performance of each surge tube based on each thermal stratification effect and each stress effect, and determining a selected surge tube from each candidate surge tube.

[0072] Here, selecting a surge pipe refers to selecting and determining a surge pipe as a target.

[0073] Specifically, after determining the thermal stratification effect and stress effect of each candidate surge tube, the server can perform performance analysis on each surge tube based on the thermal stratification effect and stress effect, and determine the selected surge tube from the candidate surge tubes. It can be understood that the weaker the thermal stratification effect and stress effect, the more suitable the candidate surge tube is for use as the selected surge tube of the voltage stabilization system, and the more conducive it is to maintaining the stability of the voltage stabilization system.

[0074] The above-mentioned surge pipe analysis method obtains the respective pipeline layout modes of multiple candidate surge pipes, and can determine the pipeline layout conditions corresponding to each candidate surge pipe. For each candidate surge pipe, a candidate surge pipe model that matches the pipeline layout mode of the candidate surge pipe is determined. Based on the candidate surge pipe model, a thermal stratification analysis is performed on the candidate surge pipe to determine the thermal stratification effect of the candidate surge pipe. Based on the candidate surge pipe model, a stress analysis is performed on the candidate surge pipe to determine the stress effect of the candidate surge pipe. The thermal stratification effect and stress effect of each candidate surge pipe can be determined based on model simulation. Finally, a performance analysis is performed on each surge pipe based on each thermal stratification effect and each stress effect, and a selected surge pipe is determined from each candidate surge pipe. Finally, a surge pipe with the best thermal stratification suppression effect and the smallest stress pressure can be selected as the surge pipe of the voltage stabilization system, thereby improving the stability of the voltage stabilization process.

[0075] In an exemplary embodiment, a thermal stratification analysis is performed on a candidate surge pipe based on a candidate surge pipe model to determine a thermal stratification effect of the candidate surge pipe, including: splitting the candidate surge pipe model to obtain multiple candidate surge pipe sub-models; for each candidate surge pipe model, when the candidate surge pipe model is in a simulation operation stage, determining a pipe temperature difference between a top pipe and a bottom pipe in the candidate surge pipe model; and determining a thermal stratification effect of the candidate surge pipe based on the temperature differences of each pipe.

[0076] The candidate surge pipe sub-model refers to the split model obtained after the candidate surge pipe model is split. The simulation operation phase refers to the process of simulating the candidate surge pipe model based on the parameters of the actual working conditions.

[0077] Specifically, during the thermal stratification analysis of the candidate surge tube, if Figure 8 As shown, the server can first split the candidate surge pipe model to obtain multiple candidate surge pipe sub-models. After that, for each candidate surge pipe model, when the candidate surge pipe model is in the simulation operation stage, the pipeline temperature difference between the top pipe and the bottom pipe in the candidate surge pipe model is determined. Since the fluid flows through the surge pipe during the pressure control process, the fluid temperature in the nitrogen pressurizer is low and the density is high, and it will mainly gather in the lower part of the surge pipe section; the fluid temperature in the pressure vessel is high and the density is low, and it will mainly gather in the upper part of the surge pipe section. This phenomenon is called the thermal stratification of the pressurizer surge pipe. This phenomenon will cause uneven temperature distribution on the upper and lower parts of the pipe wall, thereby causing overall bending thermal stress and local thermal stress in the surge pipe section. Therefore, the thermal stratification effect of the candidate surge pipe can be determined based on the temperature difference of each pipeline.

[0078] In some specific embodiments, the thermal stratification effect can be determined by thermal-fluid-solid coupling calculation. Specifically, the fluid-solid coupling heat transfer analysis is implemented by using the Fluent software under ANSYS to simulate the fluid flow and heat transfer of the surge tube under actual transient operating conditions and the temperature change of the solid domain of the surge tube. The temperature difference at the center of the wall thickness at the top and bottom of the surge tube is analyzed in detail to determine and measure the suppression effect of different surge tube structures on thermal stratification.

[0079] In this embodiment, the candidate surge pipe model is split, and the pipe temperature difference between the top pipe and the bottom pipe of each split candidate surge pipe model is determined, and then the thermal stratification effect of the candidate surge pipe is judged, which can ensure the accuracy of the determination of the thermal stratification effect and thus improve the stability of the pressure stabilization system.

[0080] In an exemplary embodiment, the thermal stratification effect of the candidate surge pipe is determined based on the temperature difference of each pipeline, including: for each candidate surge pipe model, obtaining the pipeline layout data corresponding to the candidate surge pipe model; performing data analysis based on the pipeline layout data and the pipeline temperature difference to determine the thermal stratification degree of the candidate surge pipe model; based on each thermal stratification degree, determining the thermal stratification effect of the candidate surge pipe.

[0081] The pipeline layout data refers to the specific parameter data of the pipeline layout of the surge pipe, for example, the pipeline layout data may include the pipeline inclination angle, the pipeline inner diameter, etc. The degree of thermal stratification refers to the degree of occurrence of the thermal stratification phenomenon, which can also be understood as the thermal stratification suppression effect.

[0082] Specifically, after determining the pipe temperature difference between the top pipe and the bottom pipe in the candidate surge pipe model, the server can determine the pipe layout data corresponding to each candidate surge pipe model to specifically determine the pipe layout situation corresponding to each candidate surge pipe model. Since the pipe layout situation will also affect the thermal stratification effect of the candidate surge pipe model, the server can perform data analysis based on the pipe layout data and the pipe temperature difference to determine the degree of thermal stratification of the candidate surge pipe model, and determine the thermal stratification effect of the candidate surge pipe based on the degree of thermal stratification.

[0083] In some specific embodiments, since the analysis of the thermal stratification suppression effect combines the numerical simulation results with the theoretical analysis results, the occurrence of thermal stratification depends on the ratio of buoyancy to fluid inertia. The greater the buoyancy or the smaller the inertia, the easier it is for thermal stratification to occur. In this embodiment, the degree of thermal stratification is represented by the dimensionless Richardson number (Ri):

[0084]

[0085] That is,

[0086] Where g is the acceleration due to gravity, which is 9.81 m2 / s. When the pipeline is arranged obliquely, it can be rewritten as ; is the thermal expansion coefficient of water, ℃-1; Di is the inner diameter of the pipe, m; is the temperature difference between cold and hot fluids, °C; u is the fluid flow rate, m / s.

[0087] Generally speaking, the size of the Ri number characterizes the possibility of thermal stratification. If the Ri number is greater than 1, thermal stratification may occur. The Ri number represents the relative size of the buoyancy and inertia forces during fluid flow. The buoyancy is caused by the density difference between the cold and hot fluids. In addition to being related to the physical parameters and flow characteristic scale of the fluid, its size is also directly related to the temperature difference in the flow field. In addition to being related to the physical parameters and flow characteristic scale of the fluid, the size of the inertia force also depends on the flow velocity of the fluid.

[0088] In this embodiment, for each candidate surge pipe model, the pipeline layout data and the pipeline temperature difference of the candidate surge pipe model are comprehensively analyzed to determine the thermal stratification effect, which can ensure the accuracy of the thermal stratification effect determination.

[0089] In an exemplary embodiment, stress analysis is performed on a candidate surge tube based on a candidate surge tube model to determine a stress effect of the candidate surge tube, including: performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine a stress nephogram corresponding to the candidate surge tube model; and determining the stress effect of the candidate surge tube based on the stress distribution in the stress nephogram.

[0090] Among them, stress cloud map is a way of expressing the stress field of an object in physics. Stress cloud map is mainly divided into two types: color cloud map and grayscale cloud map. Color cloud map uses different colors to indicate different stresses, while grayscale cloud map uses different grayscale levels to correspond to different stresses.

[0091] Specifically, the server can perform stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress cloud map corresponding to the candidate surge tube model. Since the stress cloud map can express the stress field of the object, the server can determine the stress effect of the candidate surge tube based on the stress distribution in the stress cloud map. In some specific embodiments, the server can calculate the stress cloud map of the candidate surge tube model through the workbench.

[0092] In this embodiment, the stress effect of the candidate surge tube is determined based on the stress distribution in the stress cloud diagram of the candidate surge tube model, which can ensure the accuracy of the stress effect determination.

[0093] In an exemplary embodiment, based on the stress distribution in the stress cloud map, the stress effect of the candidate surge tube is determined, including: performing cross-sectional cutting on the node with the largest stress in the stress cloud map to obtain a cross-sectional cloud map corresponding to the node; performing stress analysis on the cross-sectional cloud map to determine the stress value corresponding to the point cloud; and determining the stress effect of the candidate surge tube based on the numerical value of the stress value.

[0094] The cross-sectional cloud diagram refers to the stress cloud diagram corresponding to the cross section of the surge tube.

[0095] Specifically, after determining the stress cloud map corresponding to the candidate surge tube model, the server can first determine the node with the largest stress in the stress cloud map, and perform cross-section cutting on the stress cloud map based on the node to obtain the cross-section cloud map corresponding to the node, and then perform stress analysis on the cross-section cloud map to determine the stress value corresponding to the point cloud, and determine the stress effect of the candidate surge tube based on the numerical value of the stress value. In a specific embodiment, the server can compare the equivalent stress distribution and size of the structure after the temperature, pressure load and gravity load are applied to the surge tube when the thermal stratification is the most severe, and perform stress linearization analysis along the wall thickness direction at the point where the equivalent stress is the largest, and compare the obtained primary and secondary stress values ​​with the relevant specifications in ASME (American Society of Mechanical Engineers) to determine whether the surge tube in this state meets the requirements in the specifications.

[0096] In this embodiment, cross-section cutting and analysis are performed based on the point with the maximum stress in the stress cloud diagram, so as to ensure the accuracy of the determination of the stress effect.

[0097] In an exemplary embodiment, the surge pipe analysis method also includes: adjusting the surge pipe parameters of the selected surge pipe according to preset multiple parameter change values ​​to obtain multiple updated surge pipes corresponding to the selected surge pipe; establishing corresponding updated surge pipe models for each updated surge pipe based on the adjusted surge pipe parameters; performing thermal stratification analysis and stress analysis on each updated surge pipe model to determine the updated thermal stratification effect and updated stress effect of the updated surge pipe model; performing performance analysis on each updated surge pipe based on each thermal stratification effect and each stress effect to determine a target surge pipe from each updated surge pipe.

[0098] The parameter change value refers to the change value of various parameters of the surge pipe, for example, it can be the change value of the pipe diameter, pipe length, inclination angle and wall thickness.

[0099] Specifically, after determining the selected surge pipe of the pipeline arrangement with better performance, the server can adjust the parameters of the selected surge pipe, that is, adjust the surge pipe parameters of the selected surge pipe according to the preset multiple parameter change values, and obtain multiple updated surge pipes corresponding to the selected surge pipe, and then re-analyze the performance of the updated surge pipe according to the method in the above embodiment, and finally determine the target surge pipe corresponding to a set of change parameters with the best performance under the pipeline arrangement. That is, the server can adjust the surge pipe parameters of the selected surge pipe according to the preset multiple parameter change values, and obtain multiple updated surge pipes corresponding to the selected surge pipe, and establish corresponding updated surge pipe models for each updated surge pipe based on the adjusted surge pipe parameters, and perform thermal stratification analysis and stress analysis on each updated surge pipe model to determine the updated thermal stratification effect and updated stress effect of the updated surge pipe model, and perform performance analysis on each updated surge pipe based on each thermal stratification effect and each stress effect, and determine the target surge pipe from each updated surge pipe.

[0100] In this embodiment, after determining the selected surge pipe of the pipeline arrangement with better performance, the server can adjust the parameters of the selected surge pipe and finally determine a target surge pipe with the best relative performance, which is conducive to ensuring the stability of the voltage stabilization system.

[0101] In a specific embodiment, a nitrogen regulator surge pipe design optimization process and an optimal layout scheme and structure obtained based on the process are also provided. This surge pipe can effectively alleviate the thermal stratification phenomenon, and has a simple structure, which is convenient for installation and maintenance in actual engineering applications.

[0102] The implementation process includes the following:

[0103] Based on the existing experience, several surge pipe layouts are proposed: non-wrap, horizontal wrap, wrap-up, wrap-down, and "X" layout. The highest temperature and pressure in each working condition are applied to the surge pipes under these layouts as temperature and pressure loads.

[0104] After the load is applied, it is found that the stress at the elbow of the surge pipe that is not arranged in a surrounding manner is more than 2 times greater than that of other arrangements. This phenomenon is mainly due to the fact that the thermal elongation of the surge pipe is concentrated at the horizontally arranged elbow, causing the inner side to be compressed and the outer side to be tensile. Therefore, this arrangement is not considered.

[0105] The remaining layouts are selected: horizontal surround, surround rise, surround descend, and "X" layout, and thermal fluid-solid coupling calculations and structural mechanics evaluations are carried out under typical working conditions. In the thermal fluid-solid coupling calculation process, the thermal fluid-solid coupling analysis of the surge tube is realized based on computational fluid dynamics software, which is highly consistent with the actual operating state. The main purpose is to compare the top and bottom temperature differences of the surge tube at multiple temperature measurement sections, and analyze the effects of different layouts on thermal stratification. The structural mechanics evaluation part mainly compares whether the maximum stress and mechanical state of the surge tube structure under different layouts meet the requirements of relevant specifications.

[0106] Based on the above-mentioned surge tube arrangement with better results in thermal-fluid-solid coupling calculation and structural mechanics evaluation, the analysis and research on other structural parameters of the surge tube were carried out, including tube diameter, length, inclination angle, wall thickness, etc., to explore the influence of the above parameters on the thermal stratification phenomenon and structural mechanics characteristics in the surge tube;

[0107] Finally, the optimal layout scheme and related parameters of nitrogen pressurizer surge pipe were determined;

[0108] The surge tube of the optimal solution was subjected to relevant analysis under marine conditions, fatigue analysis and safety verification under multiple conditions, further proving that the surge tube designed based on this optimized process can withstand multiple cycles under multiple conditions.

[0109] After fatigue analysis and verification, the optimal surge pipe arrangement scheme in the present invention is obtained.

[0110] The best layout of nitrogen pressure regulator surge pipe is:

[0111] The surge pipe includes a first horizontal section, a first connecting section, a surrounding downwardly inclined section, a second connecting section, a second horizontal section, a third connecting section, and a vertical section. The above surge pipe sections are connected in sequence; the first horizontal section is connected to the descending section of the pressure vessel, the first and second connecting sections are used to connect the horizontal section and the inclined section, the third connecting section is used to connect the horizontal section and the vertical section, and the lower end of the vertical section is connected to the stabilizer tank body and the vertical surge pipe in the tank body.

[0112] As an improvement of the nitrogen pressurizer surge pipe, the surge pipe arrangement is compatible with a small pressurized water reactor and a nitrogen pressurization system, and meets the compact layout requirements of a small pressurized water reactor. The vertical section of the surge pipe extends from top to bottom and is inserted below the liquid level of the pressurizer tank.

[0113] As an improvement of the nitrogen stabilizer surge pipe, the surrounding downward inclined section forms an angle of 5°~15° with the horizontal plane, which can be determined according to the actual space limitations of the surge pipe layout. The angles between each segment in the pipe section and the horizontal plane are consistent.

[0114] As an improvement to the nitrogen pressurizer surge pipe, the side length of the "mouth"-shaped area approximately formed around the descending section is close to the diameter of the pressurizer tank.

[0115] As an improvement of the nitrogen stabilizer surge pipe, the first horizontal section, the first connecting section, the surrounding downward inclined section, the second connecting section, the second horizontal section, the third connecting section, and the vertical section are all made of 316LN stainless steel with the same inner and outer diameters.

[0116] As an improvement to the nitrogen pressure regulator surge pipe, the radius of the elbows of the first and second connecting sections is 1.5 to 2 times the outer diameter of the straight pipe section.

[0117] Specifically, the pressurizer surge tube needs to be rigorously experimentally studied before it is put into formal use in nuclear power plants. With the substantial improvement in computer performance in recent years, numerical simulation research on surge tubes is becoming an important means of safety analysis of surge tubes. Compared with experimental research, numerical simulation can greatly reduce capital investment and can verify the results of experimental research.

[0118] This embodiment provides a surge pipe layout optimization process, please refer to Fig. 9 , the specific process is as follows:

[0119] Step 102, based on existing experience, several surge tube layout methods are proposed: non-circular, horizontally circular, circular rising, circular descending, and an I-shaped pattern.

[0120] Specifically, the non-surrounding arrangement (see Figure 3 ) is a surge pipe connected to three sections 01, 02 and 03 in the horizontal direction through two 90-degree elbows, of which 01 is shorter and connected to the descending section of the pressure vessel, and the straight pipe section 02 is connected to the surge pipe section 03 through a 90-degree elbow arranged in the horizontal plane, and 03 is connected to the stabilizer tank body; the three different forms of the surround arrangement, horizontal surround, surround rise, surround descend, can be referred to Figure 4-6 ; ... Figure 7 ) On the basis of non-circular arrangement, by adding 4 90-degree elbows and 3 straight pipe sections to section 02, a "J"-shaped structure is formed to absorb pipeline deformation.

[0121] Step 103 , loading the maximum temperature that the surge tube can withstand under the selected working condition as a temperature load, and loading the maximum pressure as a pressure load.

[0122] Specifically, the selected working condition has a wide range of working condition envelopes, which can cover the temperature, pressure and other parameter ranges of other working conditions. The highest temperature and pressure of the selected working condition are loaded to the surge tube as temperature and pressure loads, which can envelop all temperature and pressure conditions within the considered working condition range, and is used to study the mechanical properties of the surge tube under extreme working conditions.

[0123] Step 104 , through numerical calculation, eliminate the arrangement with obviously larger stress result.

[0124] Specifically, in this design, calculations found that since other arrangements have a stronger ability to absorb thermal deformation than the non-surrounding arrangement of the surge tube, the maximum stress value at the elbow when the non-surrounding arrangement is more than twice as large as other arrangements, so the non-surrounding arrangement is not considered.

[0125] Step 105, select the remaining layout modes, and carry out thermal-fluid-solid coupling calculation and structural evaluation of typical working conditions.

[0126] Specifically, the thermal fluid-solid coupling calculation is mainly realized through the Fluent software under ANSYS to realize the fluid-solid coupling heat transfer analysis, simulating the fluid flow and heat transfer of the surge tube under actual transient operating conditions and the temperature change of the solid domain of the surge tube, such as Fig.10 As shown, the temperature difference between the center of the wall thickness at the top and bottom of the surge tube is analyzed to determine the suppression effect of different surge tube structures on thermal stratification. The structural evaluation part mainly compares the equivalent stress distribution and size of the structure after the temperature, pressure load and gravity load are applied to the surge tube when the thermal stratification is the most severe, and performs stress linearization analysis along the wall thickness direction at the maximum equivalent stress. The obtained primary and secondary stress values ​​are compared with the relevant specifications in ASME to determine whether the surge tube in this state meets the requirements in the specifications.

[0127] It should be pointed out that the analysis of the thermal stratification suppression effect combines the numerical simulation results with the theoretical analysis results. The occurrence of thermal stratification depends on the ratio of buoyancy to fluid inertia. The greater the buoyancy or the smaller the inertia, the easier it is for thermal stratification to occur. In this embodiment, the degree of thermal stratification is represented by the dimensionless Richardson number (Ri):

[0128]

[0129] That is,

[0130] Where g is the acceleration due to gravity, which is 9.81 m2 / s. When the pipeline is arranged obliquely, it can be rewritten as ; is the thermal expansion coefficient of water, ℃-1; Di is the inner diameter of the pipe, m; is the temperature difference between cold and hot fluids, °C; u is the fluid flow rate, m / s.

[0131] Generally speaking, the size of the Ri number characterizes the possibility of thermal stratification. If the Ri number is greater than 1, thermal stratification may occur. The Ri number represents the relative size of the buoyancy and inertia forces during fluid flow. The buoyancy is caused by the density difference between the cold and hot fluids. In addition to being related to the physical parameters and flow characteristic scale of the fluid, its size is also directly related to the temperature difference in the flow field. In addition to being related to the physical parameters and flow characteristic scale of the fluid, the size of the inertia force also depends on the flow velocity of the fluid.

[0132] Step 106, preliminarily select one of the better arrangements.

[0133] Specifically, under the premise of considering the specific layout space of the surge tube, according to the calculation results of the previous step, the selected layout has obvious advantages in terms of thermal stratification suppression effect and mechanical properties.

[0134] Step 107, based on the above arrangement, conduct sensitivity analysis of other parameters of the surge pipe, including pipe diameter, pipe length, inclination angle, pipe wall thickness, etc.

[0135] Specifically, the effects of surge tubes with different diameters, lengths, inclination angles and wall thicknesses on the thermal stratification suppression effect and structural mechanical properties were studied. The conclusion is that surge tubes with small diameters have obvious effects on thermal stratification suppression, surge tubes with large wall thicknesses have certain advantages in structural mechanics, increasing the inclination angle is beneficial to alleviating the thermal stratification phenomenon, and changing the length of the surge tube has no obvious effect on the thermal stratification suppression effect and structural mechanical properties.

[0136] Step 108, determining the optimal arrangement and related parameters of the nitrogen pressure regulator surge pipe.

[0137] Specifically, the optimal layout parameters of a nitrogen pressurizer surge pipe are determined based on the actual design parameter range and layout space restrictions, and taking into account the difficulty and conventional requirements of the layout in the project.

[0138] Step 109, based on the optimal arrangement and parameters, conduct relevant research on the surge tube under marine conditions and fatigue analysis and safety verification under multiple conditions.

[0139] Specifically, the multi-condition action takes into account the continuous occurrence of conditions with a relatively high frequency, such as linear power increase, linear power reduction, and full power operation, to verify the reliability of the selected surge tube. If the nuclear power plant is operated at sea, it is necessary to carry out the influence of special movements under marine conditions such as roll and pitch on the thermal stratification and mechanical properties of the surge tube, and the multi-condition action must include marine conditions. Fatigue analysis mainly follows the relevant methods in the ASME code to determine the fatigue accumulation of the surge tube under thermal stratification and other loads.

[0140] Step 110, determine whether the surge tube arranged based on the current optimal parameters can pass the verification. If it can pass, proceed to step 111. If not, return to step 108 to reselect the optimal arrangement parameters based on the sensitivity analysis results. If it still fails, return to step 106 to reselect the arrangement method of the surge tube.

[0141] Step 111, obtaining the optimal arrangement scheme of the surge pipe in this embodiment.

[0142] Specifically, the optimal arrangement of the surge tube can meet the fatigue design and safety requirements under multiple working conditions while having a good suppression effect on thermal stratification and structural mechanical properties.

[0143] The present invention provides a layout solution based on the above optimization process, please refer to Fig.11 , comprising a first horizontal section (10-12), a first connecting section (20), a surrounding downwardly inclined section (30-38), a second connecting section (40), a second horizontal section (50-52), a third connecting section (60), and a vertical section (70), wherein the above-mentioned surge pipe sections are connected in sequence.

[0144] Specifically, the first horizontal section 10 is connected to the descending section of the pressure vessel, the first connecting section 20 is used to connect the horizontal pipe section 12 and the inclined pipe section 30, the second connecting section 40 is used to connect the inclined pipe section 38 and the horizontal pipe section 50, and the third connecting section 60 is used to connect the horizontal section 52 and the vertical section 70. The lower end of the vertical section 70 is connected to the stabilizer tank body and the vertical surge pipe in the tank body.

[0145] Specifically, the included angles between the straight pipe sections 30, 32, 34, 36, 38 in the downwardly inclined section and the horizontal plane are consistent, which is convenient for the design and installation of the surge tube in actual engineering applications. In addition, this inclination method has a better inhibitory effect on thermal stratification and can better alleviate thermal stress during operation.

[0146] Specifically, connecting sections 20 and 40 are elbows used to connect the horizontal section and the inclined section, and the radius of the elbows remains consistent; 11, 31, 33, 35, 37, 51, and 60 are 90° elbows with the same radius, and the same parameters are used to facilitate the modular design and installation of the surge pipe. The surge pipe material is 316LN stainless steel.

[0147] Specifically, spring supports and spring dampers are designed in the middle of the pipe sections 12-20-30 and the middle of the straight pipe sections 32, 34, 36 to withstand the gravity of the surge tube and the internal coolant and absorb the swaying acceleration load under marine conditions.

[0148] Compared with the prior art, the nitrogen pressure stabilizer surge pipe provided by the present invention can be found in Figure 1-2By setting up a surrounding downward inclined section (30~38), the thermal stratification phenomenon can be effectively alleviated; the overall main part is in a spiral descending state, approximately in the shape of a "mouth", which can effectively alleviate the thermal stress during overall operation; and the pipe section structure does not contain internal components, the structure is simple, will not affect the reactor building structure and overall layout, and is also easy to process and manufacture.

[0149] Compared with the prior art, the beneficial technical effect of this embodiment is that: the optimization process of the surge tube arrangement scheme provided by this embodiment fully considers the parameters that affect the safety of the surge tube structure and the ability to suppress thermal stratification, such as different arrangement modes, inclination modes, pipe diameters, pipe lengths, inclination angles, and wall thicknesses. Based on reasonable analysis methods and paths, a surge tube arrangement scheme with the best performance in terms of structural stress and thermal stratification suppression is obtained, and the fatigue conditions of the scheme under multiple working conditions are safety analyzed and verified to meet the standards in relevant specifications; in addition, the pressurizer surge tube provided by this embodiment can effectively alleviate the thermal stratification phenomenon by setting a surrounding descending inclined section and selecting a suitable inner diameter of the tube. The main part of the structure is in a surrounding descending state, which can effectively absorb the thermal deformation of the pipeline after thermal expansion and relieve the thermal stress in the pipeline. And the pipe section structure only includes 4 spring supports and hangers and 4 spring dampers, which are used to bear the weight of the pipeline structure and the internal coolant and suppress the swing under marine conditions. The overall structure is simple, does not affect the structure and arrangement in the core shielding structure, and is easy to process and manufacture.

[0150] In other specific embodiments, the optimization process of the arrangement scheme of the nitrogen pressurizer surge pipe is firstly to propose several arrangement modes based on the existing surge pipe design experience, and after loading the highest temperature and pressure load of the selected working condition, it is found that the stress at the elbow is obviously too large when the arrangement is not wrapped, and the absorption capacity of thermal deformation is poor; for the remaining several arrangement modes, the thermal fluid-solid coupling calculation and structural mechanical performance evaluation under the specified working condition are carried out based on the computational fluid dynamics software and the structural analysis software, and a better arrangement scheme of the surge pipe is selected; based on the better arrangement scheme, the sensitivity analysis of the relevant parameters is carried out, and finally the best arrangement scheme and specific parameters of the nitrogen pressurizer surge pipe are determined; based on the best surge pipe selection, the fatigue analysis under multiple working conditions is carried out to determine whether the surge pipe meets the fatigue design requirements in ASME and related specifications at this time; if the requirements are met, the optimal arrangement scheme of the surge pipe in the present invention can be obtained.

[0151] The specific arrangement scheme of the nitrogen pressurizer surge pipe includes a first horizontal section, a first connecting section, a surrounding downward inclined section, a second connecting section, a second horizontal section, a third connecting section, and a vertical section which are connected in sequence. The first horizontal section is connected to the descending section of the pressure vessel. The first and second connecting sections are used to connect the horizontal pipe section and the inclined pipe section. The lower end of the vertical section is connected to the pressurizer tank body and the vertical surge pipe in the tank body. The surrounding downward inclined section is in the shape of a "mouth" as a whole and its side length is close to the diameter of the pressurizer tank body.

[0152] Specifically, in the surge pipe, the angles between each segment in the downward inclined section and the horizontal plane are consistent and within the range of 5°~15°; each pipe segment is made of 316LN stainless steel seamless steel pipe with the same outer diameter; the first and second connecting segments are used to connect the horizontal pipe segment and the inclined pipe segment, and the radius of the connecting segment is 8D~12D, where D is the outer diameter of the surge pipe; the outer diameter of the surge pipe is between 75mm~125mm, and the wall thickness of the surge pipe is between 7mm~15mm; the radius of the elbow used to connect the surge pipe is between 1.5D~2D, where D is the outer diameter of the surge pipe.

[0153] In a specific embodiment, Fig.12 As shown, a surge tube analysis method is also provided, comprising:

[0154] Step S1201, obtaining respective pipeline layouts of a plurality of candidate surge pipes, and determining, for each candidate surge pipe, a candidate surge pipe model that matches the pipeline layout of the candidate surge pipe;

[0155] Step S1202, splitting the candidate surge pipe model to obtain multiple candidate surge pipe sub-models, and for each candidate surge pipe model, determining the pipe temperature difference between the top pipe and the bottom pipe in the candidate surge pipe model when the candidate surge pipe model is in a simulation operation stage;

[0156] Step S1203, for each candidate surge pipe model, obtain the pipeline layout data corresponding to the candidate surge pipe model, perform data analysis based on the pipeline layout data and the pipeline temperature difference, determine the thermal stratification degree of the candidate surge pipe model, and determine the thermal stratification effect of the candidate surge pipe based on each thermal stratification degree;

[0157] Step S1204, performing stress analysis on the candidate surge tube based on the candidate surge tube model, determining a stress nephogram corresponding to the candidate surge tube model, performing cross-section cutting on the node with the largest stress in the stress nephogram, and obtaining a cross-section nephogram corresponding to the node;

[0158] Step S1205, performing stress analysis on the cross-sectional cloud image to determine the stress value corresponding to the point cloud, and determining the stress effect of the candidate surge tube based on the value of the stress value;

[0159] Step S1206, analyzing the performance of each surge tube based on each thermal stratification effect and each stress effect, and determining a selected surge tube from each candidate surge tube;

[0160] Step S1207, adjusting the surge pipe parameters of the selected surge pipe according to the preset multiple parameter change values, obtaining multiple updated surge pipes corresponding to the selected surge pipe, and establishing corresponding updated surge pipe models for each updated surge pipe based on the adjusted surge pipe parameters;

[0161] Step S1208, for each updated surge pipe model, performing thermal stratification analysis and stress analysis on the updated surge pipe model to determine the updated thermal stratification effect and updated stress effect of the updated surge pipe model;

[0162] Step S1209: analyzing the performance of each updated surge tube based on each thermal stratification effect and each stress effect, and determining a target surge tube from each updated surge tube.

[0163] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0164] Based on the same inventive concept, the embodiment of the present application also provides a surge tube analysis device for implementing the above-mentioned surge tube analysis method. The implementation solution provided by the device is similar to the implementation solution recorded in the above-mentioned method, so the specific limitations in one or more surge tube analysis device embodiments provided below can refer to the limitations of the surge tube analysis method above, and will not be repeated here.

[0165] In an exemplary embodiment, Fig.13 As shown, a surge pipe analysis device 1300 is provided, comprising: a layout acquisition module 1302, a surge pipe model determination module 1304, a thermal stratification analysis module 1306, a stress analysis module 1308 and a performance analysis module 1310, wherein:

[0166] The arrangement mode acquisition module 1302 is used to acquire the pipeline arrangement mode of each of the plurality of candidate surge pipes;

[0167] The surge pipe model determination module 1304 is used to determine, for each candidate surge pipe, a candidate surge pipe model that matches the pipeline arrangement of the candidate surge pipe;

[0168] A thermal stratification analysis module 1306 is used to perform thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe;

[0169] A stress analysis module 1308, for performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress effect of the candidate surge tube;

[0170] The performance analysis module 1310 is used to perform performance analysis on each surge tube based on each thermal stratification effect and each stress effect, and determine a selected surge tube from each candidate surge tube.

[0171] In an exemplary embodiment, the thermal stratification analysis module 1306 includes:

[0172] A model splitting unit, used for splitting the candidate surge pipe model to obtain multiple candidate surge pipe sub-models;

[0173] a temperature difference determination unit, for determining, for each candidate surge pipe model, a pipe temperature difference between a top pipe and a bottom pipe in the candidate surge pipe model when the candidate surge pipe model is in a simulation operation stage;

[0174] The thermal stratification effect determination unit is used to determine the thermal stratification effect of the candidate surge pipe based on the temperature difference of each pipeline.

[0175] In an exemplary embodiment, the thermal stratification effect determination unit is specifically configured to:

[0176] For each candidate surge pipe model, obtain pipeline layout data corresponding to the candidate surge pipe model;

[0177] Perform data analysis based on pipeline layout data and pipeline temperature differences to determine the degree of thermal stratification of candidate surge pipe models;

[0178] Based on the degree of thermal stratification, the thermal stratification effect of the candidate surge tube is determined.

[0179] In an exemplary embodiment, the stress analysis module 1308 includes:

[0180] A stress cloud map determining unit, used for performing stress analysis on a candidate surge tube based on a candidate surge tube model, and determining a stress cloud map corresponding to the candidate surge tube model;

[0181] The stress effect determination unit is used to determine the stress effect of the candidate surge tube based on the stress distribution in the stress cloud diagram.

[0182] In an exemplary embodiment, the stress effect determination unit is specifically configured to:

[0183] Perform cross-section cutting on the node with the largest stress in the stress cloud diagram to obtain the cross-section cloud diagram corresponding to the node;

[0184] Perform stress analysis on the cross-section cloud diagram to determine the stress value corresponding to the point cloud;

[0185] Based on the magnitude of the stress value, the stress effect of the candidate surge tube is determined.

[0186] In an exemplary embodiment, the surge tube analysis device 1300 further includes a surge tube update module, which is specifically used to:

[0187] Adjusting the surge pipe parameters of the selected surge pipe according to the preset multiple parameter change values ​​to obtain multiple updated surge pipes corresponding to the selected surge pipe;

[0188] Based on the adjusted surge tube parameters, a corresponding updated surge tube model is established for each updated surge tube;

[0189] For each updated surge pipe model, thermal stratification analysis and stress analysis are respectively performed on the updated surge pipe model to determine the updated thermal stratification effect and updated stress effect of the updated surge pipe model;

[0190] The performance of each updated surge tube is analyzed based on each thermal stratification effect and each stress effect, and a target surge tube is determined from among the updated surge tubes.

[0191] Each module in the above-mentioned surge tube analysis device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0192] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig.14As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a method for analyzing a wave tube is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0193] Those skilled in the art will understand that Fig.14 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0194] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of the above method when executing the computer program.

[0195] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0196] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above method when executed by a processor.

[0197] 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, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0198] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory 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. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0199] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 application.

[0200] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A surge tube analysis method, characterized in that: The method comprises: Obtain respective pipeline arrangements of a plurality of candidate surge pipes; For each of the candidate surge pipes, determining a candidate surge pipe model that matches the pipeline arrangement of the candidate surge pipe; Performing a thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine a thermal stratification effect of the candidate surge pipe; Performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine stress effects of the candidate surge tube; The performance of each of the surge tubes is analyzed based on the thermal stratification effects and the stress effects, and a selected surge tube is determined from among the candidate surge tubes.

2. The method according to claim 1, characterized in that The step of performing thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe includes: Splitting the candidate surge pipe model to obtain a plurality of candidate surge pipe sub-models; For each of the candidate surge pipe models, when the candidate surge pipe model is in a simulation operation stage, determining a pipe temperature difference between a top pipe and a bottom pipe in the candidate surge pipe model; Based on the temperature differences of the pipelines, the thermal stratification effect of the candidate surge pipe is determined.

3. The method according to claim 2, characterized in that Determining the thermal stratification effect of the candidate surge pipe based on the temperature difference of each pipeline includes: For each of the candidate surge pipe models, obtaining pipeline layout data corresponding to the candidate surge pipe model; Performing data analysis based on the pipeline layout data and the pipeline temperature difference to determine the degree of thermal stratification of the candidate surge pipe model; Based on the respective thermal stratification degrees, a thermal stratification effect of the candidate surge tube is determined.

4. The method according to claim 1, characterized in that: The performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress effect of the candidate surge tube includes: Performing stress analysis on the candidate surge tube based on the candidate surge tube model to determine a stress nephogram corresponding to the candidate surge tube model; Based on the stress distribution in the stress cloud map, the stress effect of the candidate surge tube is determined.

5. The method according to claim 4, characterized in that The determining the stress effect of the candidate surge tube based on the stress distribution in the stress cloud map includes: Performing cross-sectional cutting on the node with the largest stress in the stress cloud diagram to obtain a cross-sectional cloud diagram corresponding to the node; Performing stress analysis on the cross-sectional cloud image to determine the stress value corresponding to the point cloud; Based on the numerical value of the stress value, the stress effect of the candidate surge tube is determined.

6. The method according to claim 1, characterized in that The method further comprises: Adjusting the surge pipe parameters of the selected surge pipe respectively according to the preset multiple parameter change values ​​to obtain multiple updated surge pipes corresponding to the selected surge pipe; Based on the adjusted surge tube parameters, a corresponding updated surge tube model is established for each of the updated surge tubes; For each updated surge pipe model, respectively performing thermal stratification analysis and stress analysis on the updated surge pipe model to determine an updated thermal stratification effect and an updated stress effect of the updated surge pipe model; The performance of each of the updated surge tubes is analyzed based on the thermal stratification effects and the stress effects, and a target surge tube is determined from among the updated surge tubes.

7. A surge tube analysis device, characterized in that: The device comprises: A layout acquisition module is used to acquire the pipeline layout of each of the plurality of candidate surge pipes; A surge pipe model determination module is used to determine, for each candidate surge pipe, a candidate surge pipe model that matches the pipeline arrangement of the candidate surge pipe; A thermal stratification analysis module, used to perform thermal stratification analysis on the candidate surge pipe based on the candidate surge pipe model to determine the thermal stratification effect of the candidate surge pipe; A stress analysis module, configured to perform stress analysis on the candidate surge tube based on the candidate surge tube model to determine the stress effect of the candidate surge tube; A performance analysis module is used to perform performance analysis on each of the surge tubes based on each of the thermal stratification effects and each of the stress effects, and to determine a selected surge tube from each of the candidate surge tubes.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

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

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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