Simulation method, system and equipment for wear of steam generator pipeline and storage medium

Abstract

The invention provides a steam generator pipeline wear simulation method, system and device and a storage medium, and relates to the technical field of physical testing. The simulation method comprises the steps that a fluid-solid coupling model of the heat transfer tube bundle and the foreign matter is established, and the foreign matter model is set to be a rigid body dynamic mesh model; solving the fluid-solid coupling model to determine stress information and motion information of the foreign body model under the action of the flow field; and based on the instantaneous speed and the resistance, the accumulated wear depth of the foreign matter to the heat transfer tube bundle under the action of the flow field is determined. According to the simulation method, the foreign matter stress information is captured in real time in the foreign matter movement process, the foreign matter movement information is updated, meanwhile, the abrasion rate of the heat transfer tube bundle is synchronously calculated based on the foreign matter stress and movement information, and full-process real-time simulation of lifting resistance, displacement and the abrasion rate of the foreign matter in the simulation process is achieved; and the accuracy and the reliability of a wear depth simulation result are greatly improved.

Description

Technical Field

[0001] This disclosure relates to the field of physical testing technology, and in particular to a simulation method, system, device and storage medium for wear of steam generator pipelines. Background Technology

[0002] Steam generators, as critical heat exchange equipment in nuclear power plants, are a type of high-safety-level pressure vessel. During operation, the heat transfer tubes of steam generators may suffer wear defects due to foreign objects on the secondary side. Once foreign objects enter the secondary side, they generate flow-induced vibrations under fluid impact, leading to repeated contact with the tube wall and ultimately causing wear failure. In severe cases, this can even lead to perforation of the heat transfer tubes and leakage of radioactive media, affecting the safe operation of the power plant. Therefore, the frequent occurrence of foreign object incidents on the secondary side of steam generators has attracted widespread attention in the nuclear power industry. Current simulation methods for assessing the wear depth of heat transfer tube bundles caused by foreign objects in the flow field neglect the real-time mutual disturbance between the flow field and the motion of the foreign objects. They also fail to comprehensively consider the dynamic coupling effects of buoyancy, drag, and motion damping forces on the motion of the foreign objects. This leads to a mismatch between the simulated force information on the foreign objects and their actual motion state, resulting in significant deviations between simulation results and actual operating conditions. Furthermore, these simulation methods cannot synchronously predict changes in wear rate and cumulative wear depth during the simulation process, causing wear life assessment to rely on post-processed data and exhibiting response lag.

[0003] Therefore, there is a need to provide a simulation method, system, equipment, and storage medium for steam generator pipeline wear in order to improve the above-mentioned problems. Summary of the Invention

[0004] The purpose of this disclosure is to provide a simulation method, system, device, and storage medium for wear of steam generator pipelines, in order to improve the technical problems caused by the simulation method neglecting the mutual disturbance between the movement of foreign objects and the flow field, failing to calculate the dynamic force of foreign objects under the action of the flow field in real time, and failing to simultaneously predict the wear rate change and cumulative wear depth, resulting in excessive deviation between the simulation results and the actual working conditions.

[0005] To achieve the above and other related objectives, in a first aspect, this disclosure provides a simulation method for wear in steam generator piping, the simulation method comprising the following steps: A fluid-structure interaction model of the heat transfer tube bundle and the foreign object is established, wherein the foreign object model is set as a rigid body dynamic mesh model; The fluid-structure interaction model is solved to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag acting on the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model; Based on the instantaneous velocity and the resistance, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

[0006] In one example of the present invention, establishing the fluid-structure interaction model between the heat transfer tube bundle and the foreign object includes: A geometric model of the heat transfer tube bundle is established, which includes a solid domain model of the heat transfer tube bundle and a fluid domain model outside the heat transfer tube bundle. Based on the property information of the foreign object to be simulated, a foreign object model is introduced into the geometric model to obtain a fluid-structure interaction model; the property information includes the mass, volume and geometry of the foreign object.

[0007] In one example of the present invention, the establishment of the fluid-structure interaction model between the heat transfer tube bundle and the foreign object further includes: meshing the fluid-structure interaction model; wherein the geometric model is set as a structured mesh model and the foreign object model is set as an unstructured mesh model.

[0008] In one example of the present invention, the distance between the foreign object model and the solid domain model is preset, and the direction of the motion degree of freedom of the foreign object model is set to the flow field direction of the fluid domain model.

[0009] In one example of the present invention, solving the fluid-structure interaction model to determine the force and motion information of the foreign object model under the action of the flow field includes: simulating the force and motion information of the foreign object model under the action of the flow field using CFX.

[0010] In one example of the present invention, determining the force and motion information of the foreign object model under the action of a flow field using finite element simulation with CFX includes: Based on the flow field parameters of the fluid domain model and the property information of the foreign object model, the gravity and buoyancy force acting on the foreign object model are dynamically loaded. Based on the flow field parameters of the fluid domain model and the mass and instantaneous velocity of the foreign object model, the motion damping force on the foreign object model is dynamically applied; The drag and lift forces experienced by the foreign object model under the action of the flow field were simulated using CFX finite element method. The frictional force experienced by the foreign object model is determined based on the resistance, instantaneous velocity, and friction coefficient between the foreign object and the heat transfer tube bundle. The motion information of the foreign object model is updated based on the gravity, buoyancy, drag, lift, motion damping force, and friction force acting on the foreign object.

[0011] In one example of the present invention, determining the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field, based on the instantaneous velocity and the resistance, includes: Based on the instantaneous velocity and the resistance, the wear rate of the heat transfer tube bundle by the foreign object model is determined; Based on the wear rate, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

[0012] Secondly, this disclosure provides a simulation system for wear of steam generator pipelines, the simulation system comprising: The model building module is used to build a fluid-structure interaction model of the heat transfer tube bundle and the foreign object, wherein the foreign object model is set as a rigid body dynamic mesh model. The foreign object state simulation module is used to solve the fluid-structure interaction model to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag acting on the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model; The wear determination module determines the cumulative wear depth of the heat transfer tube bundle under the action of the foreign object in the flow field, based on the instantaneous velocity and the resistance.

[0013] Thirdly, this disclosure provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the methods described in the preceding examples.

[0014] Fourthly, this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method described in any of the above examples.

[0015] The simulation method for steam generator pipe wear disclosed herein employs fluid-structure interaction dynamic mesh technology. Foreign objects introduced into the geometric model of the heat transfer tube bundle are set as rigid body dynamic mesh models. During the movement of these foreign objects, the method captures and updates their force and motion information in real time. Simultaneously, based on the force and motion information of the foreign objects, the wear rate of the foreign objects in contact with the heat transfer tube bundle is calculated synchronously. This avoids the problem of disconnection between the motion and force data of the foreign objects during the simulation process, achieving real-time simulation of the lift resistance, displacement, and wear rate of the foreign objects throughout the entire simulation process. This significantly improves the accuracy and reliability of the simulation results for wear depth. Attached Figure Description

[0016] The features and advantages of this disclosure will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the scope of this disclosure in any way. Figure 1 The diagram shows a flow chart of a steam generator pipeline wear simulation method in one embodiment of this disclosure. Figure 2The diagram shown is a flowchart of step S1 in one embodiment of this disclosure. Figure 3 This is a three-dimensional view of a heat transfer tube bundle geometry model according to an embodiment of this disclosure; Figure 4 The diagram shows a fluid domain model defined in a geometric model according to an embodiment of this disclosure. Figure 5 This is a schematic diagram showing the introduction of foreign objects into the geometric model of a heat transfer tube bundle in one embodiment of the present disclosure; Figure 6 This diagram shows the contact position between a foreign object and a heat transfer tube bundle in one embodiment of this disclosure. Figure 7 The diagram shown is a flowchart of step S2 in one embodiment of this disclosure; Figure 8 The figure shows the time history curves of lift and drag experienced by a foreign object in a simulated embodiment of this disclosure. Figure 9 The figure shown is a simulated time history curve of foreign object displacement in one embodiment of this disclosure; Figure 10 The diagram shown is a flowchart of step S3 in one embodiment of this disclosure; Figure 11 The figure shown is a simulated wear power time history curve in one embodiment of this disclosure; Figure 12 The diagram shown is a structural block diagram of a simulation system according to an embodiment of this disclosure. Figure 13 The diagram shown is a structural block diagram of a computer device according to an embodiment of this disclosure.

[0017] Component designation explanation: 10. Simulation system; 11. Model building module; 12. Foreign object state simulation module; 13. Wear determination module. Detailed Implementation

[0018] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0019] Please see Figures 1 to 13 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this disclosure. Therefore, the drawings only show components related to this disclosure and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] Currently, the simulation method for the wear of heat transfer tube bundles caused by foreign objects in the flow field usually adopts the non-moving mesh method, that is, extracting lift and drag data under the condition of the foreign object being fixed, and then performing offline dynamic motion calculations. This decoupled method ignores the influence of the interaction between the movement of the foreign object and the flow field, resulting in a mismatch between the lift and drag data and the actual motion state, making it difficult to accurately reflect the entire wear process.

[0021] Based on this, this disclosure provides a simulation method for wear of steam generator pipes. The foreign object introduced into the geometric model of the heat transfer tube bundle is set as a rigid body dynamic network model. During the movement of the foreign object, the force information of the foreign object is captured in real time and the movement information of the foreign object is updated. At the same time, the wear rate of the foreign object on the contact heat transfer tube bundle is calculated synchronously based on the force information and movement information of the foreign object. This avoids the problem of the foreign object movement and force data being disconnected during the simulation process, and realizes the real-time simulation of the lift resistance, displacement and wear rate of the foreign object throughout the entire process. This greatly improves the accuracy and reliability of the simulation results of wear depth.

[0022] Please see Figures 1 to 11 In a first aspect, this disclosure provides a simulation method for wear in steam generator piping, the simulation method comprising the following steps: Step S1: Establish a fluid-structure interaction model of the heat transfer tube bundle and the foreign object, wherein the foreign object model is set as a rigid body dynamic mesh model.

[0023] like Figure 2 As shown, in some embodiments, step S1 includes the following steps: S11. Establish a geometric model of the heat transfer tube bundle, which includes a solid domain model of the heat transfer tube bundle and a fluid domain model outside the heat transfer tube bundle.

[0024] In step S11, as Figure 3 As shown, firstly, based on the actual size and location of the heat transfer tube bundle, a solid domain model of the heat transfer tube bundle is established. In the solid domain model, the heat transfer tube bundle is set as a rigid wall. For example... Figure 4 As shown, the flow field parameters are then determined based on the physical properties of the fluid medium between the actual heat transfer tube bundles and the instantaneous velocity of the fluid. Based on the flow field parameters, the spatial distribution of fluid velocity is simulated outside the solid domain model to establish a fluid domain model outside the solid domain model.

[0025] S12. Based on the attribute information of the foreign object to be simulated, a foreign object model is introduced into the geometric model to obtain a fluid-structure interaction model. The attribute information includes the material, mass, volume and geometry of the foreign object.

[0026] In step S12, as Figure 5 and Figure 6As shown, based on the geometry of the foreign object to be simulated, a foreign object model is established in the geometric model. The shapes of the foreign objects can be categorized as spherical, strip-shaped, and plate-shaped. The introduced foreign object model is set as a rigid body moving mesh model, and the direction of its motion degrees of freedom is set to the flow direction of the fluid domain model. For example, if the flow direction is set to the X direction, the foreign object model only retains the X-direction motion degree of freedom and prohibits displacement and rotational degrees of freedom in the Y and Z directions. The distance between the introduced foreign object model and the heat transfer tube bundle in the geometric model is preset (e.g., 0.1 mm) to allow for a small movement gap between the foreign object and the heat transfer tube bundle and to avoid negative volume in the solid domain model.

[0027] In some embodiments, step S1 further includes meshing the established fluid-structure interaction model. The geometric model is configured as a structured mesh model, and the foreign object model is configured as an unstructured mesh model. In one example, local mesh refinement is performed on the boundary region of the foreign object model; for example, the dynamic mesh size at the boundary of the foreign object model is preferably 0.1 mm, to further improve simulation accuracy and mesh stability.

[0028] Next, step S2 is executed to solve the fluid-structure interaction model in order to determine the force and motion information of the foreign object model under the action of the flow field.

[0029] In step S2, CFX is used to simulate the dynamic force and motion information of the foreign object model under the action of the flow field. The force information includes the gravity, buoyancy, friction, motion damping force, lift and drag experienced by the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model.

[0030] Specifically, such as Figure 7 As shown, in some embodiments, step S2 includes the following steps: S21. Based on the flow field parameters of the fluid domain model and the attribute information of the foreign object model, dynamically load the gravity and buoyancy force on the foreign object model.

[0031] In step S21, the gravity M acting on the foreign object model is determined based on the mass of the foreign object; where gravity M is mg and m is the mass of the foreign object. Based on the fluid density and the volume of the foreign object, the buoyancy force acting on the foreign object model in the flow field is determined according to equation (1). F b The relationship in equation (1) is as follows: (1) in, For fluid density, g It is the acceleration due to gravity. V 0 represents the volume of the foreign object.

[0032] S22. Based on the flow field parameters of the fluid domain model and the mass and instantaneous velocity of the foreign object model, dynamically apply the motion damping force to the foreign object model.

[0033] In step S22, based on the damping coefficient between the fluid and the foreign object, as well as the mass and instantaneous velocity of the foreign object, the motion damping force experienced by the foreign object model during its motion in the flow field is determined according to equation (2). F damp The relationship in equation (2) is as follows: (2) in, c The damping coefficient between the fluid and the foreign object. The instantaneous velocity is the current state of motion of the foreign object.

[0034] S23. Use CFX finite element method to simulate the drag and lift force experienced by the foreign object model under the action of the flow field.

[0035] like Figure 8 As shown, in step S23, the surface force of the foreign object model under the action of fluid is simulated using ANSYS CFX finite element method. The force on the surface of the foreign object parallel to the direction of fluid flow is used as the drag force, and the force on the surface of the foreign object perpendicular to the direction of fluid flow is used as the lift force.

[0036] S24. Based on the resistance, instantaneous velocity, and friction coefficient between the foreign object and the heat transfer tube bundle, determine the frictional force experienced by the foreign object model. In step S24, the Coulomb friction model is used. Based on the instantaneous velocity vector of the foreign object, the resistance it experiences, and the friction coefficient between the foreign object and the infectious tract, the friction force on the foreign object model is determined according to equation (3). F f The relationship in equation (3) is as follows: (3) in, The coefficient of friction between the foreign object and the heat transfer tube bundle. F n Resistance to foreign objects F d Sign( v () is the sign of the direction of frictional force as a function of the velocity vector of the foreign object. The direction of frictional force is opposite to the direction of motion of the foreign object.

[0037] S25. Update the motion information of the foreign object model based on the gravity, buoyancy, drag, lift, motion damping force and friction force experienced by the foreign object.

[0038] like Figure 9As shown, in step S25, based on the above-mentioned dynamically loaded gravity, buoyancy, resistance, lift, motion damping force and friction, the instantaneous resultant force of the foreign object during the motion process is obtained, and the instantaneous acceleration, instantaneous velocity and displacement of the foreign object are further updated based on the resultant force.

[0039] Next, step S3 is performed: based on the instantaneous velocity and the resistance, the cumulative wear depth of the foreign object on the heat transfer tube bundle under the action of the flow field is determined.

[0040] In step S3, based on the resistance and velocity relationship under real-time loading, the instantaneous wear rate and cumulative wear depth of the foreign object on the heat transfer tube bundle are accurately calculated using the Archard wear model. Specifically... Figure 10 As shown, in some embodiments, step S3 includes the following steps: S31. Based on the instantaneous velocity and the resistance, determine the wear rate of the heat transfer tube bundle by the foreign object model.

[0041] like Figure 11 As shown, in step S31, the instantaneous wear power is first determined based on the resistance and speed of the real-time loading, according to the relationship in equation (4). P ( t The relationship in equation (4) is as follows: (4) in, This represents the instantaneous resistance experienced by the foreign object under the influence of the flow field. The instantaneous velocity during the motion; Then, based on instantaneous wear power P ( t The wear rate of the foreign object on the heat transfer tube bundle is determined according to the relationship between the wear coefficient of the heat transfer tube bundle and the wear coefficient of the heat transfer tube bundle, according to Equation (5). W ( t The relationship in equation (5) is as follows: (5) in, k The wear coefficient set for the heat transfer tube bundle.

[0042] S32. Based on the wear rate, determine the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field.

[0043] In step S32, based on the wear rate, the cumulative wear depth caused by the movement of foreign matter on the heat transfer tube bundle is determined according to Equation (6), which is as follows: (6) in, H The hardness of the heat transfer tube bundle.

[0044] In summary, the simulation method for steam generator pipe wear employs fluid-structure interaction dynamic mesh technology. Foreign objects introduced into the geometric model of the heat transfer tube bundle are set as rigid body dynamic mesh models. During the movement of these foreign objects, their force information is captured in real time and their motion information is updated. Simultaneously, based on the force and motion information of the foreign objects, the wear rate of the foreign objects in contact with the heat transfer tube bundle is calculated synchronously. This avoids the problem of the movement and force data of the foreign objects being disconnected during the simulation process, achieving real-time simulation of the lift resistance, displacement, and wear rate of the foreign objects throughout the entire simulation process. This significantly improves the accuracy and reliability of the simulation results for wear depth.

[0045] In a second aspect, in some embodiments, the present invention provides a simulation system 10 for steam generator pipeline wear, which corresponds one-to-one with the simulation methods in the above embodiments.

[0046] like Figure 12 As shown, the simulation system 10 for steam generator pipeline wear includes a model building module 11, a foreign object state simulation module 12, and a wear determination module 13. Detailed descriptions of each functional module are as follows: Model building module 11 is used to build a fluid-structure interaction model of heat transfer tube bundle and foreign object, wherein the foreign object model is set as a rigid body dynamic mesh model; The foreign object state simulation module 12 is used to solve the fluid-structure interaction model to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag experienced by the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model. Wear determination module 13 determines the cumulative wear depth of the heat transfer tube bundle under the action of the foreign object in the flow field based on the instantaneous velocity and the resistance.

[0047] In one embodiment, the model building module 11 is specifically used for: A geometric model of the heat transfer tube bundle is established, which includes a solid domain model of the heat transfer tube bundle and a fluid domain model outside the heat transfer tube bundle. Based on the attribute information of the foreign object to be simulated, a foreign object model is introduced into the geometric model to obtain a fluid-structure interaction model; the distance between the foreign object model and the solid domain model is preset, and the direction of the motion degree of freedom of the foreign object model is set to the flow field direction of the fluid domain model; the attribute information includes the mass, volume and geometry of the foreign object.

[0048] In one embodiment, the model building module 11 is specifically used for: The fluid-structure interaction model is meshed; wherein the geometric model is set as a structured mesh model and the foreign object model is set as an unstructured mesh model.

[0049] In one embodiment, the foreign object state simulation module 12 is specifically used to: simulate the force and motion information of the foreign object model under the action of the flow field using CFX.

[0050] In one embodiment, the foreign object state simulation module 12 is specifically used for: Based on the flow field parameters of the fluid domain model and the property information of the foreign object model, the gravity and buoyancy force acting on the foreign object model are dynamically loaded. Based on the flow field parameters of the fluid domain model and the mass and instantaneous velocity of the foreign object model, the motion damping force on the foreign object model is dynamically applied; The drag and lift forces experienced by the foreign object model under the action of the flow field were simulated using CFX finite element method. The frictional force experienced by the foreign object model is determined based on the resistance, instantaneous velocity, and friction coefficient between the foreign object and the heat transfer tube bundle. The motion information of the foreign object model is updated based on the gravity, buoyancy, drag, lift, motion damping force, and friction force acting on the foreign object.

[0051] In one embodiment, the wear determination module 13 is specifically used for: Based on the instantaneous velocity and the resistance, the wear rate of the heat transfer tube bundle by the foreign object model is determined; Based on the wear rate, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

[0052] Specific limitations regarding the simulation system 10 can be found in the above description of the limitations on the foreign object wear acceptance method, and will not be repeated here. Each module in the simulation system 10 can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0053] In one embodiment, a computer device is provided, the internal structure of which can be shown in the following diagram. Figure 13 As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used to communicate with an external server via a network connection. When executed by the processor, the computer program implements the functions or steps of a Doppler point detection method.

[0054] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to perform the following steps: A fluid-structure interaction model of the heat transfer tube bundle and the foreign object is established, wherein the foreign object model is set as a rigid body dynamic mesh model; The fluid-structure interaction model is solved to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag acting on the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model; Based on the instantaneous velocity and the resistance, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

[0055] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor: A fluid-structure interaction model of the heat transfer tube bundle and the foreign object is established, wherein the foreign object model is set as a rigid body dynamic mesh model; The fluid-structure interaction model is solved to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag acting on the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model; Based on the instantaneous velocity and the resistance, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

[0056] It should be noted that the functions or steps that can be implemented by the computer-readable storage medium or computer device described above can be referred to the relevant descriptions on the server side and client side in the foregoing method embodiments. To avoid repetition, they will not be described one by one here.

[0057] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAM bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

Claims

1. A simulation method for wear of steam generator pipelines, characterized in that, include: A fluid-structure interaction model of the heat transfer tube bundle and the foreign object is established, wherein the foreign object model is set as a rigid body dynamic mesh model; The fluid-structure interaction model is solved to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag acting on the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model; Based on the instantaneous velocity and the resistance, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

2. The simulation method according to claim 1, characterized in that, The establishment of the fluid-structure interaction model between the heat transfer tube bundle and the foreign object includes: A geometric model of the heat transfer tube bundle is established, which includes a solid domain model of the heat transfer tube bundle and a fluid domain model outside the heat transfer tube bundle. Based on the property information of the foreign object to be simulated, a foreign object model is introduced into the geometric model to obtain a fluid-structure interaction model; the property information includes the mass, volume and geometry of the foreign object.

3. The simulation method according to claim 2, characterized in that, The establishment of the fluid-structure interaction model between the heat transfer tube bundle and the foreign object also includes: The fluid-structure interaction model is meshed; wherein the geometric model is set as a structured mesh model and the foreign object model is set as an unstructured mesh model.

4. The simulation method according to claim 2, characterized in that, The distance between the foreign object model and the solid domain model is preset, and the direction of the motion degree of freedom of the foreign object model is set to the flow field direction of the fluid domain model.

5. The simulation method according to claim 2, characterized in that, Solving the fluid-structure interaction model to determine the force and motion information of the foreign object model under the action of the flow field includes: The force and motion information of the foreign object model under the action of the flow field are simulated using CFX.

6. The simulation method according to claim 5, characterized in that, The finite element simulation using CFX is used to determine the force and motion information of the foreign object model under the action of the flow field, including: Based on the flow field parameters of the fluid domain model and the property information of the foreign object model, the gravity and buoyancy force acting on the foreign object model are dynamically loaded. Based on the flow field parameters of the fluid domain model and the mass and instantaneous velocity of the foreign object model, the motion damping force on the foreign object model is dynamically applied; The drag and lift forces experienced by the foreign object model under the action of the flow field were simulated using CFX finite element method. The frictional force on the foreign object model is determined based on the resistance, instantaneous velocity, and friction coefficient between the foreign object and the heat transfer tube bundle. The motion information of the foreign object model is updated based on the gravity, buoyancy, drag, lift, motion damping force, and friction force experienced by the foreign object.

7. The simulation method according to claim 1, characterized in that, The determination of the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field, based on the instantaneous velocity and the resistance, includes: Based on the instantaneous velocity and the resistance, the wear rate of the heat transfer tube bundle by the foreign object model is determined; Based on the wear rate, the cumulative wear depth of the heat transfer tube bundle caused by the foreign object under the action of the flow field is determined.

8. A simulation system for wear of steam generator pipelines, characterized in that, include: The model building module is used to build a fluid-structure interaction model of the heat transfer tube bundle and the foreign object, wherein the foreign object model is set as a rigid body dynamic mesh model. The foreign object state simulation module is used to solve the fluid-structure interaction model to determine the force and motion information of the foreign object model under the action of the flow field; the force information includes the gravity, buoyancy, friction, motion damping force, lift and drag acting on the foreign object model, and the motion information includes the instantaneous velocity of the foreign object model; The wear determination module determines the cumulative wear depth of the heat transfer tube bundle under the action of the foreign object in the flow field, based on the instantaneous velocity and the resistance.

9. A computer device, characterized in that, include: Processor and memory; The memory is used to store computer programs; The processor is connected to the memory and is used to execute a computer program stored in the memory, so that the computer device performs the simulation method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the simulation method according to any one of claims 1 to 7.

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