Characterization Method, Device and Equipment for Nuclear Power Wire-Wound Rod Bundle Grid Model

Abstract

The present application relates to a method, device, and equipment for characterizing a grid model of a nuclear power wire-wound rod bundle. The method includes: constructing an initial grid model of a target wire-wound rod bundle assembly; extracting at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly; mapping each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain a target mapping point for each control point; and determining the grid model of the wire-wound rod bundle of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of the control point. Using this method can improve the characterization accuracy of the grid model of the wire-wound rod bundle, thereby achieving accurate prediction of the three-dimensional flow field of the coolant in the nuclear power wire-wound assembly.

Description

Technical Field

[0001] The present application relates to the technical field of thermal-hydraulic design of fast neutron reactor cores, and particularly to a method, device, and equipment for depicting a grid model of a nuclear power wire-wrapped rod bundle. Background Art

[0002] With the development of the nuclear power field, after a nuclear reactor shuts down, it is necessary to use the reactor residual heat removal system (such as a liquid metal cooled breeder reactor) to ensure that the residual heat of the nuclear reactor core is promptly removed. Currently, the fuel assemblies of liquid metal cooled breeder reactors usually adopt a wire-wrapped rod bundle assembly design: metal wires are wound around the surface of the fuel rods to form a wire-wrapped rod bundle to avoid direct contact between the fuel rods, and the wire-wrapped rod bundles are arranged in a regular triangular grid pattern within a regular hexagonal assembly casing. The liquid metal coolant flows along the gaps between the rod bundles, thereby strengthening the cooling effect on the fuel rods.

[0003] However, due to the relatively complex internal structure of the wire-wrapped rod bundle assembly design, there is a problem of low depiction accuracy in the process of depicting the grid model of the wire-wrapped assembly, making it difficult to predict the three-dimensional flow field of the coolant within the wire-wrapped assembly, which urgently needs to be solved. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a method, device, and equipment for depicting a grid model of a nuclear power wire-wrapped rod bundle that can improve the depiction accuracy of the grid model of the nuclear power wire-wrapped rod bundle.

[0005] In a first aspect, the present application provides a method for depicting a grid model of a nuclear power wire-wrapped rod bundle. The method includes:

[0006] Construct an initial grid model of the target wire-wrapped rod bundle assembly;

[0007] Extract at least two control points from the boundary surface of the initial grid model of the target wire-wrapped rod bundle assembly;

[0008] Map each control point in the initial grid model of the target wire-wrapped rod bundle assembly to the target wire-wrapped rod bundle assembly to obtain the target mapping point of each control point;

[0009] Determine the wire-wrapped rod bundle grid model of the target wire-wrapped rod bundle assembly according to the initial grid model of the target wire-wrapped rod bundle assembly and the position change amount between each control point and the target mapping point of this control point.

[0010] In one embodiment, mapping each control point in the initial grid model of the target wire-wrapped rod bundle assembly to the target wire-wrapped rod bundle assembly to obtain the target mapping point of each control point includes:

[0011] Map each control point to the target wire-wound rod bundle assembly to obtain the initial mapping point of each control point on the target wire-wound rod bundle assembly;

[0012] According to the rod bundle radius, main winding circle radius and transition winding circle radius of each wire-wound rod bundle in the target wire-wound rod bundle assembly, the distance between the rod bundle center and the main winding center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly, determine the target mapping point of each control point on the target wire-wound rod bundle assembly.

[0013] In one embodiment, according to the rod bundle radius, main winding circle radius and transition winding circle radius of each wire-wound rod bundle in the target wire-wound rod bundle assembly, the distance between the rod bundle center and the main winding center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly, determining the target mapping point of each control point on the target wire-wound rod bundle assembly includes:

[0014] For each wire-wound rod bundle in the target wire-wound rod bundle assembly, according to the rod bundle radius, main winding circle radius and transition winding circle radius of the wire-wound rod bundle, and the distance between the rod bundle center and the main winding center, determine the area to be updated on the boundary of the wire-wound rod bundle, and divide the area to be updated of the wire-wound rod bundle into a main winding area and a transition winding area;

[0015] Judge whether there is a first target point among the control points whose initial mapping point falls in the area to be updated of the wire-wound rod bundle;

[0016] If so, determine the mapping wire-wound area of the initial mapping point corresponding to the first target point from the main winding area and the transition winding area, and determine the target mapping point of the first target point on the target wire-wound rod bundle assembly according to the mapping wire-wound area.

[0017] In one embodiment, according to the rod bundle radius, main winding circle radius and transition winding circle radius of the wire-wound rod bundle, and the distance between the rod bundle center and the main winding center, determining the area to be updated on the boundary of the wire-wound rod bundle and dividing the area to be updated of the wire-wound rod bundle into a main winding area and a transition winding area includes:

[0018] According to the rod bundle radius, main winding circle radius and transition winding circle radius of the wire-wound rod bundle, and the distance between the rod bundle center and the main winding center, determine the transition winding center; the transition winding circle is tangent to the rod bundle and the main winding circle respectively;

[0019] According to the transition winding center and the rod bundle center, determine the area to be updated on the boundary of the wire-wound rod bundle;

[0020] According to the transition winding center, the rod bundle center and the main winding center, determine the first polar angle and the second polar angle corresponding to the wire-wound rod bundle;

[0021] Determine the regional division angle according to the rod bundle radius, main winding wire circle radius, transition winding wire circle radius, first polar angle, and second polar angle of the wire-wound rod bundle;

[0022] Divide the area to be updated of the wire-wound rod bundle into a main winding wire area and a transition winding wire area according to the regional division angle.

[0023] In one embodiment, the method further includes:

[0024] If among all the control points, there is a mapped point that does not fall on the second target point of the area to be updated of each wire-wound rod bundle, then use the initial mapped point of the second target point as the target mapped point of the second target point on the target wire-wound rod bundle assembly.

[0025] In one embodiment, according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point, determine the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly, including:

[0026] According to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point, determine the position change amount of each grid point in the initial grid model;

[0027] Perform position change processing on each grid point in the initial grid model according to the position change amount of each grid point in the initial grid model to obtain the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly.

[0028] In one embodiment, according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point, determine the position change amount of each grid point in the initial grid model, including:

[0029] According to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point, based on the inverse distance interpolation algorithm, determine the position change amount of each grid point in the initial grid model.

[0030] In a second aspect, the present application also provides a device for characterizing the grid model of a nuclear power wire-wound rod bundle. The device includes:

[0031] An initial construction module, configured to construct an initial grid model of a target wire-wound rod bundle assembly;

[0032] An extraction module, configured to extract at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly;

[0033] A mapping module, configured to map each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point;

[0034] A model determination module, configured to determine the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0035] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the following steps are implemented:

[0036] Construct an initial grid model of the target wire-wound rod bundle assembly;

[0037] Extract at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly;

[0038] Map each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point;

[0039] Determine the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0040] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the following steps are implemented:

[0041] Construct an initial grid model of the target wire-wound rod bundle assembly;

[0042] Extract at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly;

[0043] Map each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point;

[0044] Determine the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0045] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program. When the computer program is executed by a processor, the following steps are implemented:

[0046] Construct an initial mesh model of the target wire-wound rod bundle assembly;

[0047] Extract at least two control points from the boundary surface of the initial mesh model of the target wire-wound rod bundle assembly;

[0048] Map each control point in the initial mesh model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point;

[0049] Determine the wire-wound rod bundle mesh model of the target wire-wound rod bundle assembly according to the initial mesh model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point.

[0050] The above method, device and equipment for characterizing the nuclear power wire-wound rod bundle mesh model extract at least two control points on the boundary of the pre-constructed initial mesh model of the target wire-wound rod bundle assembly, map each control point to the target wire-wound rod bundle assembly, and determine the position change amount between each control point and the target mapping point of this control point; and determine the wire-wound rod bundle mesh model of the target wire-wound rod bundle assembly according to the initial mesh model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point. Since at least two control points on the initial mesh model are on the boundary, and the boundary of the target wire-wound rod bundle assembly is also clearly visible, the process of mapping each control point to the target wire-wound rod bundle assembly will be very simple. And according to the position change amount between at least two control points on the boundary of the initial mesh model and the target mapping point of this control point on the target wire-wound rod bundle assembly, as well as all the grid points on the initial mesh model, the position change amounts of all the grid points on the initial mesh model are determined. On the basis of improving the accuracy of determining the position change amounts of all the grid points, the process of determining the position change amounts of all the grid points is also made clearer and simpler. Also, because the change amounts of all the meshes in the initial mesh model are determined, the determined wire-wound rod bundle mesh model of the target wire-wound rod bundle assembly can be made more accurate, so as to realize the accurate prediction of the three-dimensional flow field of the coolant in the wire-wound assembly. Description of the Drawings

[0051] Figure 1 It is an application environment diagram of a method for characterizing a wire-wound rod bundle mesh model provided in this embodiment;

[0052] Figure 2 It is a flowchart of the first method for characterizing a wire-wound rod bundle mesh model provided in this embodiment;

[0053] Figure 3 It is a flowchart of mapping each control point in the initial mesh model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point provided in this embodiment;

[0054] Figure 4 Schematic diagram of a wire-wound rod bundle, a main wire-wound circle and a transition wire-wound circle provided in this embodiment;

[0055] Figure 5 Flow schematic diagram of the second method for characterizing the wire-wound rod bundle grid model provided in this embodiment;

[0056] Figure 6 Structural block diagram of the first device for characterizing the wire-wound rod bundle grid model provided in this embodiment;

[0057] Figure 7 Structural block diagram of the second device for characterizing the wire-wound rod bundle grid model provided in this embodiment;

[0058] Figure 8 Structural block diagram of the third device for characterizing the wire-wound rod bundle grid model provided in this embodiment;

[0059] Figure 9 Internal structure diagram of a computer device provided in this embodiment. Detailed implementation manners

[0060] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to 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.

[0061] The method for characterizing the wire-wound rod bundle grid model provided in the embodiments of the present application can be applied to an application environment as shown in Figure 1 In one embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as shown in Figure 1 The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, 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, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store relevant data for characterizing the wire-wound rod bundle grid model. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a method for characterizing the wire-wound rod bundle grid model.

[0062] In one embodiment, as shown in Figure 2 a method for characterizing a nuclear power wire-wound rod bundle grid model is provided, and this method is applied to Figure 1Taking the computer in [it] as an example for illustration, it includes the following steps:

[0063] S201, construct an initial mesh model of the target wire-wound rod bundle assembly.

[0064] Among them, the target wire-wound rod bundle assembly is the wire-wound rod bundle assembly that needs to be characterized by a mesh model. For example, it can be a nuclear power wire-wound rod bundle. In this embodiment, for the target wire-wound rod bundle assembly that needs to be characterized by a mesh model, first, through a pre-set mesh model generation software, based on the attribute information of the target wire-wound rod bundle assembly, model simulation processing is performed to determine the initial mesh model of the target wire-wound rod bundle assembly.

[0065] Optionally, the attribute information of the target wire-wound rod bundle assembly can be the 3D model of the target wire-wound rod bundle assembly, or the image information of the target wire-wound rod bundle assembly at different angles, which is not limited herein. Exemplarily, in this embodiment, the 3D model of the target wire-wound rod bundle assembly is input into the pre-set mesh model generation software, and the mesh model generation software processes the received 3D model of the target wire-wound rod bundle assembly and outputs the initial mesh model of the target wire-wound rod bundle assembly.

[0066] It should be noted that the target wire-wound rod bundle assembly can be an assembly composed of multiple wire-wound rod bundles, and moreover, the initial mesh model of the target wire-wound rod bundle assembly output after being processed by the above-mentioned mesh model generation software is a model that does not consider the wire-winding geometric features of each wire-wound rod bundle in the target wire-wound rod bundle assembly. That is to say, the initial mesh model cannot be used as the wire-wound rod bundle mesh model of the target wire-wound rod bundle assembly.

[0067] S202, extract at least two control points from the boundary surface of the initial mesh model of the target wire-wound rod bundle assembly.

[0068] Among them, the control point can be any point on the boundary surface of the initial mesh model of the target wire-wound rod bundle assembly and can be regarded as the representative point of the initial mesh model. Optionally, in this embodiment, the method of extracting control points from the boundary surface of the initial mesh model of the target wire-wound rod bundle assembly can be extracted according to a pre-determined extraction rule. For example, it can be randomly extracted from all points on the boundary surface of the initial mesh model, and the extracted points are used as control points; it can also be to pre-determine a spacing threshold for characterizing the distance between each control point, and according to this spacing threshold, points with a spacing equal to the spacing threshold are continuously extracted on the boundary surface of the initial mesh model, and the extracted points are used as control points.

[0069] S203, map each control point in the initial mesh model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point.

[0070] Among them, the target mapping point can be the corresponding position point of each control point in the initial grid model of the target wire-wound rod bundle assembly on the target wire-wound rod bundle assembly.

[0071] Optionally, in this embodiment, there are many ways to map each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly, and no limitation is imposed on this. One implementable way can be to input each control point in the initial grid model of the target wire-wound rod bundle assembly and the target wire-wound rod bundle assembly into a pre-trained control point mapping model. The control point mapping model analyzes and processes the received data and outputs the target wire-wound rod bundle assembly after the mapping is completed. Among them, the mapped points in the target wire-wound rod bundle assembly after the mapping will be highlighted (for example, highlighted), and each mapped point corresponds to each control point. The highlighted mapped points in the target wire-wound rod bundle assembly after the mapping are used as the target mapping points of each control point. Another implementable way can be to perform size normalization processing on the initial grid model of the target wire-wound rod bundle assembly and the target wire-wound rod bundle assembly, so that the initial grid model of the target wire-wound rod bundle assembly and the target wire-wound rod bundle assembly have the same size, and determine the corresponding position point of each control point on the target wire-wound rod bundle assembly according to the position of each control point in the initial grid model of the target wire-wound rod bundle assembly, and use the corresponding position point of each control point on the target wire-wound rod bundle assembly as the target mapping point of the control point.

[0072] S204. Determine the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0073] Among them, the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly can be a grid model of the target wire-wound rod bundle assembly including wire-wound geometric features.

[0074] In this embodiment, the method for determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly may be as follows: based on the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point, determine the position change amount of each grid point in the initial grid model; according to the position change amount of each grid point in the initial grid model, perform position change processing on each grid point in the initial grid model to obtain the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly. Optionally, in this embodiment, there are many ways to determine the position change amount of each grid point in the initial grid model. One feasible way may be to determine the average position change amount of the control points based on the position change amount between each control point and the target mapping point of this control point, and the number of control points, take the average position change amount of the control points as the position change amount of each grid point in the initial grid model, and according to the position change amount of each grid point in the initial grid model, perform position change processing on each grid point in the initial grid model. After all grid points have been subjected to position change processing, the initial grid model is used as the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly. Another feasible way may be to determine the position change amount of each grid point in the initial grid model based on the inverse distance interpolation algorithm according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point. Exemplarily, the position change amount of each grid point in the initial grid model may be determined based on the inverse distance interpolation algorithm according to the position of each grid point in the initial grid model of the target wire-wound rod bundle assembly, the weight of each grid point relative to the control point, the position change amount between each control point and the target mapping point of this control point, and the number of control points, which can accurately determine the position change amount of each grid point in the initial grid, providing guarantee for determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly. For example, the following formula (1) may be used for processing:

[0075]

[0076] In the formula, d(x) is the position change amount of grid point x; N is the number of control points; is the weight of grid point x relative to the i-th control point; w i (x) is the distance between grid point x and the i-th control point; d(x i ) is the i-th control point x i and the position change amount between this control point x i and its target mapping point.

[0077] In the above embodiments, based on each grid point in the initial grid model of the target wire-wound rod bundle assembly, and the position change amount between each control point and the target mapping point of this control point, the position change amount of each grid point in the initial grid model is determined, and in the process of determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the position change amount of each grid point in the initial grid model, since the position change amount between each control point and the target mapping point of this control point is predetermined, and each grid point in the initial grid model of the target wire-wound rod bundle assembly is also known, therefore, the whole process makes the process of determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly simpler.

[0078] In the above method for characterizing the nuclear power wire-wound rod bundle grid model, at least two control points are extracted on the boundary of the initial grid model of the pre-constructed target wire-wound rod bundle assembly, and each control point is mapped to the target wire-wound rod bundle assembly, and the position change amount between each control point and the target mapping point of this control point is determined; and the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly is determined according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point. Since at least two control points on the initial grid model are all on the boundary, and the boundary of the target wire-wound rod bundle assembly is also clearly visible, therefore, the process of mapping each control point to the target wire-wound rod bundle assembly will be very simple. And according to the position change amount between at least two control points on the boundary of the initial grid model and the target mapping points of these control points on the target wire-wound rod bundle assembly, as well as all grid points on the initial grid model, the position change amount of all grid points on the initial grid model is determined. On the basis of improving the accuracy of determining the position change amount of all grid points, it also makes the process of determining the position change amount of all grid points clearer and simpler. Also, because what is determined is the change amount of all grids in the initial grid model, so the wire-wound rod bundle grid model of the determined target wire-wound rod bundle assembly can be made more accurate, so as to realize the accurate prediction of the three-dimensional flow field of the coolant in the wire-wound assembly.

[0079] Further, in order to make the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly determined according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point more accurate, it is necessary to first ensure the accuracy of mapping each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point. In one embodiment, as Figure 3 shown, mapping each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point includes:

[0080] S301. Map each control point to the target wire-wound rod bundle assembly to obtain the initial mapping point of each control point on the target wire-wound rod bundle assembly.

[0081] Among them, the initial mapping point can be the mapping point obtained when mapping each control point in the initial mesh model of the target wire-wound rod bundle assembly to the corresponding position on the target wire-wound rod bundle assembly. It should be noted that since the initial mesh model of the target wire-wound rod bundle assembly does not consider the wire-wound geometric characteristics of the target wire-wound rod bundle assembly, when mapping each control point to the target wire-wound rod bundle assembly, the wire-wound geometric characteristics of the target wire-wound rod bundle assembly are not considered either, but each control point is mapped to the rod bundle boundary of the target wire-wound rod bundle.

[0082] In this embodiment, according to each control point in the initial mesh model of the target wire-wound rod bundle assembly and the target wire-wound rod bundle assembly, each control point can be mapped to its corresponding position on the target wire-wound rod bundle assembly, and this position is used as the initial mapping point of the control point on the target wire-wound rod bundle assembly.

[0083] S302. Determine the target mapping point of each control point on the target wire-wound rod bundle assembly according to the rod bundle radius, main wire-wound circle radius, and transition wire-wound circle radius of each wire-wound rod bundle in the target wire-wound rod bundle assembly, the distance between the rod bundle center and the main wire-wound center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly.

[0084] Among them, the main wire-wound circle of the wire-wound rod bundle can be the wire-wound adjacent to the rod bundle; the transition wire-wound circle of the wire-wound rod bundle is the circle formed between two adjacent main wire-wound circles of the wire-wound rod bundle. It can be understood that for each wire-wound, there will be other wire-wounds on its left and right, so the number of transition wire-wound circles is generally 2. For the convenience of understanding by those skilled in the art, by way of example, Figure 4 shows the relationship between the wire-wound rod bundle, the main wire-wound circle, and the transition wire-wound circle. In the figure, the arc S1 with point A as the center and radius R F is the boundary of the wire-wound rod bundle, the circle S2 with point B as the center and radius R S is the main wire-wound circle, the circle S3 with point C2 as the center and radius R1 is one transition wire-wound circle, and the circle S4 with the center C1 that is symmetric to the transition wire-wound circle C2 along the x-axis with the connection line between point A and point B as the x-axis is the other transition wire-wound circle. That is to say, for a wire-wound rod bundle, it corresponds to one main wire-wound circle and two transition wire-wound circles.

[0085] Optionally, in this embodiment, the method for determining the target mapping point of each control point on the target wire-wound rod bundle assembly may be to input the target wire-wound rod bundle assembly into a pre-trained target mapping point determination model. The target wire-wound rod bundle assembly records the rod bundle radius, main wire-wound circle radius, transition wire-wound circle radius of each wire-wound rod bundle, the distance between the rod bundle center and the main wire-wound center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly. The target mapping point determination model analyzes and processes the received data and outputs the target wire-wound rod bundle assembly recording the target mapping point of each control point on the target wire-wound rod bundle assembly. Another implementation method may be to, for each wire-wound rod bundle in the target wire-wound rod bundle assembly, determine the area to be updated on the boundary of the wire-wound rod bundle according to the rod bundle radius, main wire-wound circle radius, transition wire-wound circle radius of the wire-wound rod bundle, and the distance between the rod bundle center and the main wire-wound center, and divide the area to be updated of the wire-wound rod bundle into a main wire-wound area and a transition wire-wound area; determine whether there is a first target point among the control points whose initial mapping point falls in the area to be updated of the wire-wound rod bundle; if so, determine the mapping wire-wound area of the initial mapping point corresponding to the first target point from the main wire-wound area and the transition wire-wound area, and determine the target mapping point of the first target point on the target wire-wound rod bundle assembly according to the mapping wire-wound area. The area to be updated may be the area where the position of the initial mapping point on the boundary of the wire-wound rod bundle needs to be changed. Exemplarily, the area to be updated may be Figure 4 the dotted line area between point a and point b on the middle rod bundle. The main wire-wound area may be the area where the initial mapping point in this area needs to be changed to the main wire-wound circle. Exemplarily, the main wire-wound area may be Figure 4 the dotted line area between point e and point f on the middle rod bundle. The auxiliary wire-wound area may be the area where the initial mapping point in this area needs to be changed to the auxiliary wire-wound circle. Exemplarily, the auxiliary wire-wound area may be Figure 4 the area between point a and point e, and between point f and point b on the middle rod bundle.

[0086] In this embodiment, the method for determining the area to be updated on the boundary of the wire-wound rod bundle may be as follows: First, determine the center of the transition wire-winding circle according to the rod bundle radius, the main wire-winding circle radius, the transition wire-winding circle radius of the wire-wound rod bundle, and the distance between the center of the rod bundle and the center of the main wire-winding circle; the transition wire-winding circle is tangent to the rod bundle and the main wire-winding circle respectively; determine the area to be updated on the boundary of the wire-wound rod bundle according to the center of the transition wire-winding circle and the center of the rod bundle; optionally, the center of the transition wire-winding circle can be determined according to a pre-determined strategy for determining the center of the transition wire-winding circle. For example, according to a pre-determined formula for determining the center of the transition wire-winding circle, determine the center of the transition wire-winding circle according to the rod bundle radius, the main wire-winding circle radius, the transition wire-winding circle radius of the wire-wound rod bundle, and the distance between the center of the rod bundle and the center of the main wire-winding circle. Exemplarily, the formula for determining the center of the transition wire-winding circle may be as shown in formula (2) below. According to the determined position of the center of the transition wire-winding circle, the area between the connection line of the center of the wire-wound rod bundle and the center of the transition wire-winding circle is used as the area to be updated. As Figure 4 shown, the area between point a and point b between the connection line of the center A and the center C1 and the connection line of the center A and the center C2 is used as the area to be updated. Since the rod bundle radius, the main wire-winding circle radius, the transition wire-winding circle radius of the wire-wound rod bundle, and the distance between the center of the rod bundle and the center of the main wire-winding circle are all known, it is very simple and accurate to determine the center of the transition wire-winding circle according to the rod bundle radius, the main wire-winding circle radius, the transition wire-winding circle radius of the wire-wound rod bundle, and the distance between the center of the rod bundle and the center of the main wire-winding circle, and in combination with a pre-determined strategy for determining the center of the transition wire-winding circle, so as to determine the area to be updated.

[0087]

[0088] In the formula, x0 is the abscissa of the center of the transition wire-winding circle; y0 is the ordinate of the center of the transition wire-winding circle; R F is the radius of the wire-wound rod bundle; R1 is the radius of the transition wire-winding circle; R S is the radius of the main wire-winding circle; D wire is the distance between the center of the rod bundle and the center of the main wire-winding circle.

[0089] In addition, the method for dividing the area to be updated of the wire-wound rod bundle into the main wire-winding area and the transition wire-winding area may be as follows: Determine the first polar angle and the second polar angle corresponding to the wire-wound rod bundle according to the center of the transition wire-winding circle, the center of the rod bundle, and the center of the main wire-winding circle; determine the area division angle according to the rod bundle radius, the main wire-winding circle radius, the transition wire-winding circle radius, the first polar angle, and the second polar angle of the wire-wound rod bundle; divide the area to be updated of the wire-wound rod bundle into the main wire-winding area and the transition wire-winding area according to the area division angle. Among them, the first polar angle may be the included angle formed by the connection line between the center of the rod bundle and the center of the main wire-winding circle and the connection line between the center of the rod bundle and the center of the transition wire-winding circle, as Figure 4As shown, the first polar angle can be the angle θ1; the second polar angle can be the included angle formed by the connecting line between the center of the rod bundle and the center of the main winding wire and the connecting line between the center of the main winding wire and the center of the transition winding wire. For example, Figure 4 As shown, the second polar angle can be the angle θ2. The region division angle can be the angle used to divide the region to be updated into the main winding wire region and the transition winding wire region. Exemplarily, the region division angle can be the included angle formed by the connecting line between the center of the rod bundle and the center of the main winding wire and the connecting line between two intersection points on the rod bundle, where the two intersection points are the intersection points between the rod bundle and the main winding wire circle. For example, Figure 4 As shown, the region division angle can be the included angle formed by the connecting line between the center A and the point e and the connecting line between the center A and the point, that is, the angle αθ1 and the angle symmetric to it along the connecting line between the center of the rod bundle and the center of the main winding wire. That is, the region division angle can be 2αθ1. According to the determined region division angle 2αθ1, the rod bundle boundary region corresponding to the region division angle is used as the main winding wire region, and the other regions in the region to be updated except the main winding wire region are used as the transition winding wire region.

[0090] After that, if there is an initial mapping point among the control points that falls on the first target point in the region to be updated of the winding rod bundle, then according to the position of the first target point in the region to be updated, the target mapping point of the target point on the target winding rod bundle assembly is determined. Exemplarily, if the first target point falls on the main winding wire region, it is transferred to the corresponding position on the main winding wire circle. The corresponding position on the main winding wire circle can be as Figure 4 shown as the solid line region between the points c and d on the main winding wire circle. If the first target point falls on the transition winding wire region, it is transferred to the corresponding position on the transition winding wire circle. For example, if the first target point falls between the points a and e on the rod bundle boundary, it is transferred to the corresponding position on the transition winding wire circle C1. The corresponding position on the transition winding wire circle C1 can be as Figure 4 shown as the solid line region between the points a and e on the filtering winding wire circle C1. If the first target point falls between the points b and d on the rod bundle boundary, it is transferred to the corresponding position on the transition winding wire circle C2. The corresponding position on the transition winding wire circle C2 can be as Figure 4 shown as the solid line region between the points b and d on the filtering winding wire circle C2. In the above embodiments, according to the rod bundle radius, the main winding wire circle radius and the transition winding wire circle radius of each winding rod bundle in the target winding rod bundle assembly, the distance between the center of the rod bundle and the center of the main winding wire, and the initial mapping point of each control point on the target winding rod bundle assembly, determine as Figure 4 shown the corresponding relationship between the rod bundle and the main winding wire circle and the transition winding wire circle, so as to determine the target mapping point of each control point on the target winding rod bundle assembly, making the determined target mapping point more accurate.

[0091] It should be noted that if among all the control points, there is a mapped point that does not fall on the second target point in the to-be-updated area of each wire-wound rod bundle, then the initial mapped point of the second target point is used as the target mapped point of the second target point on the target wire-wound rod bundle assembly. Specifically, if there is a mapped point that does not fall on the second target point in the to-be-updated area of each wire-wound rod bundle, it proves that the initial mapped point corresponding to this control point is the target mapped point corresponding to this control point, and there is no need to perform the operation of transferring the mapped point. The initial mapped point of this control point is directly used as its target mapped point. All control points are divided into the first target points and the second target points that need to perform the operation of transferring the mapped point, and different treatments are performed on the first target points and the second target points respectively, further making the determined target mapped points more accurate, thereby improving the accuracy of determining the wire-wound rod bundle grid model.

[0092] For the convenience of understanding by those skilled in the art, the above method for depicting the nuclear power wire-wound rod bundle grid model is introduced in detail as Figure 5 shown. This method may include:

[0093] S501, constructing an initial grid model of the target wire-wound rod bundle assembly.

[0094] S502, extracting at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly.

[0095] S503, mapping each control point onto the target wire-wound rod bundle assembly to obtain the initial mapped point of each control point on the target wire-wound rod bundle assembly.

[0096] S504, determining the center of the transition wire-winding circle according to the rod bundle radius, the main wire-winding circle radius, and the transition wire-winding circle radius of this wire-wound rod bundle, as well as the distance between the center of the rod bundle and the center of the main wire-winding circle; the transition wire-winding circle is tangent to the rod bundle and the main wire-winding circle respectively.

[0097] S505, determining the to-be-updated area on the boundary of this wire-wound rod bundle according to the center of the transition wire-winding circle and the center of the rod bundle.

[0098] S506, determining the first polar angle and the second polar angle corresponding to this wire-wound rod bundle according to the center of the transition wire-winding circle, the center of the rod bundle, and the center of the main wire-winding circle.

[0099] S507, determining the area division angle according to the rod bundle radius, the main wire-winding circle radius, the transition wire-winding circle radius, the first polar angle, and the second polar angle of this wire-wound rod bundle.

[0100] S508, dividing the to-be-updated area of this wire-wound rod bundle into a main wire-winding area and a transition wire-winding area according to the area division angle.

[0101] S509: Determine whether among the control points there is an initial mapping point that falls on the first target point of the area to be updated of the wire-wound rod bundle. If yes, execute S510; if not, execute S511.

[0102] S510: If yes, determine the mapping winding area of the initial mapping point corresponding to the first target point from the main winding area and the transition winding area, and determine the target mapping point of the first target point on the target winding rod bundle assembly based on the mapping winding area.

[0103] S511: Using the initial mapping point of the second target point as the target mapping point of the second target point on the target wire-wound rod bundle assembly.

[0104] The second target point is a control point among the control points, where the mapping point does not fall within the area to be updated of each wire-wound rod bundle.

[0105] S512 , according to the initial grid model of the target wound rod bundle assembly and the position change between each control point and the target mapping point of the control point, based on an inverse distance interpolation algorithm, determine the position change of each grid point in the initial grid model.

[0106] S513 , performing position change processing on each grid point in the initial grid model according to the position change amount of each grid point in the initial grid model, to obtain a wire wound rod bundle grid model of the target wire wound rod bundle assembly.

[0107] 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 does not have a strict order restriction, 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 to be 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.

[0108] Based on the same inventive concept, embodiments of the present application also provide a nuclear power wire rod bundle grid model characterization device for implementing the aforementioned method for characterizing a nuclear power wire rod bundle grid model. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the nuclear power wire rod bundle grid model characterization device provided below can be found in the above-mentioned limitations of the nuclear power wire rod bundle grid model characterization method, and will not be repeated here.

[0109] In one embodiment, as Figure 6 shown, a characterization device 1 for a nuclear power wire-wound rod bundle grid model is provided, including: an initial construction module 10, an extraction module 11, a mapping module 12, and a model determination module 13, where:

[0110] The initial construction module 10 is configured to construct an initial grid model of a target wire-wound rod bundle assembly.

[0111] The extraction module 11 is configured to extract at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly.

[0112] The mapping module 12 is configured to map each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain a target mapping point of each control point.

[0113] The model determination module 13 is configured to determine a wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly, and the position change amount between each control point and the target mapping point of the control point.

[0114] In one embodiment, as Figure 7 shown, the mapping module 12 includes an initial mapping unit 120 and a target mapping unit 121. Wherein:

[0115] The initial mapping unit 120 is configured to map each control point to the target wire-wound rod bundle assembly to obtain an initial mapping point of each control point on the target wire-wound rod bundle assembly.

[0116] The target mapping unit 121 is configured to determine a target mapping point of each control point on the target wire-wound rod bundle assembly according to the rod bundle radius, the main winding circle radius and the transition winding circle radius of each wire-wound rod bundle in the target wire-wound rod bundle assembly, the distance between the rod bundle center and the main winding center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly.

[0117] In one embodiment, the target mapping unit 121 includes a first determination subunit, a judgment subunit, and a second determination subunit. Wherein:

[0118] The first determination subunit is configured to, for each wire-wound rod bundle in the target wire-wound rod bundle assembly, determine a to-be-updated area on the boundary of the wire-wound rod bundle according to the rod bundle radius, the main winding circle radius and the transition winding circle radius of the wire-wound rod bundle, and the distance between the rod bundle center and the main winding center, and divide the to-be-updated area of the wire-wound rod bundle into a main winding area and a transition winding area.

[0119] The judgment subunit is configured to judge whether there is a first target point among the control points whose initial mapping point falls in the to-be-updated area of the wire-wound rod bundle.

[0120] A second determination subunit, configured to, if so, determine a mapping wire winding region of an initial mapping point corresponding to the first target point from a main wire winding region and a transition wire winding region, and determine a target mapping point of the first target point on the target wire winding rod bundle assembly according to the mapping wire winding region.

[0121] In one embodiment, the first determination subunit is specifically configured to determine a transition wire winding center according to the rod bundle radius, the main wire winding circle radius, and the transition wire winding circle radius of the wire winding rod bundle, and the distance between the rod bundle center and the main wire winding center; the transition wire winding circle is tangent to the rod bundle and the main wire winding circle respectively; determine a region to be updated on the boundary of the wire winding rod bundle according to the transition wire winding center and the rod bundle center; determine a first polar angle and a second polar angle corresponding to the wire winding rod bundle according to the transition wire winding center, the rod bundle center, and the main wire winding center; determine a region division angle according to the rod bundle radius, the main wire winding circle radius, the transition wire winding circle radius, the first polar angle, and the second polar angle of the wire winding rod bundle; and divide the region to be updated of the wire winding rod bundle into a main wire winding region and a transition wire winding region according to the region division angle.

[0122] In one embodiment, the target mapping unit 121 further includes a third determination subunit, configured to, if there is a second target point among the control points whose mapping point does not fall in the region to be updated of each wire winding rod bundle, use the initial mapping point of the second target point as the target mapping point of the second target point on the target wire winding rod bundle assembly.

[0123] In one embodiment, as Figure 8 shown, the model determination module 13 includes a first determination unit 130 and a second determination unit 131. Among them:

[0124] The first determination unit 130 is configured to determine the position change amount of each grid point in the initial grid model according to the initial grid model of the target wire winding rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0125] The second determination unit 131 is configured to perform position change processing on each grid point in the initial grid model according to the position change amount of each grid point in the initial grid model to obtain a wire winding rod bundle grid model of the target wire winding rod bundle assembly.

[0126] In one embodiment, the first determination unit 130 is specifically configured to determine the position change amount of each grid point in the initial grid model according to the initial grid model of the target wire winding rod bundle assembly and the position change amount between each control point and the target mapping point of the control point based on an inverse distance interpolation algorithm.

[0127] Each module in the above-described device for characterizing the nuclear power wire-wound rod bundle grid model can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above 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 operations corresponding to each of the above modules.

[0128] In one embodiment, a computer device is provided. The computer device can be a terminal, and its internal structure diagram can be as Figure 9 shown. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, 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 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 implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a method for characterizing a nuclear power wire-wound rod bundle grid model. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, a touchpad, or a mouse, etc.

[0129] Those skilled in the art can understand that Figure 9 the structure shown in

[0130] is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0131] Construct an initial grid model of the target wire-wound rod bundle component;

[0132] Extract at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle component;

[0133] Map each control point in the initial grid model of the target wire-wound rod bundle component to the target wire-wound rod bundle component to obtain the target mapping point of each control point;

[0134] Determine the wire-wrapped rod bundle grid model of the target wire-wrapped rod bundle assembly according to the initial grid model of the target wire-wrapped rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0135] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0136] Construct an initial grid model of the target wire-wrapped rod bundle assembly;

[0137] Extract at least two control points from the boundary surface of the initial grid model of the target wire-wrapped rod bundle assembly; [

[0138] Map each control point in the initial grid model of the target wire-wrapped rod bundle assembly to the target wire-wrapped rod bundle assembly to obtain the target mapping point of each control point;

[0139] Determine the wire-wrapped rod bundle grid model of the target wire-wrapped rod bundle assembly according to the initial grid model of the target wire-wrapped rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0140] In one embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the following steps are implemented:

[0141] Construct an initial grid model of the target wire-wrapped rod bundle assembly;

[0142] Extract at least two control points from the boundary surface of the initial grid model of the target wire-wrapped rod bundle assembly;

[0143] Map each control point in the initial grid model of the target wire-wrapped rod bundle assembly to the target wire-wrapped rod bundle assembly to obtain the target mapping point of each control point;

[0144] Determine the wire-wrapped rod bundle grid model of the target wire-wrapped rod bundle assembly according to the initial grid model of the target wire-wrapped rod bundle assembly and the position change amount between each control point and the target mapping point of the control point.

[0145] It should be noted that the information (including but not limited to the information of the target wire-wrapped rod bundle assembly, the information of the initial grid model, and the information of the wire-wrapped rod bundle grid model, etc.) and data (including but not limited to the data for analysis, the stored data, the displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0146] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. 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 methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. 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), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0147] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope recorded in this specification.

[0148] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for characterizing a nuclear power wire-wound rod bundle grid model, characterized in that, The method includes: Constructing an initial grid model of the target wire-wound rod bundle assembly; Extracting at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly; Mapping each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point; Determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapping point of this control point.

2. The method according to claim 1, characterized in that, The mapping each control point in the initial grid model of the target wire-wound rod bundle assembly to the target wire-wound rod bundle assembly to obtain the target mapping point of each control point includes: Mapping each control point to the target wire-wound rod bundle assembly to obtain the initial mapping point of each control point on the target wire-wound rod bundle assembly; Determining the target mapping point of each control point on the target wire-wound rod bundle assembly according to the rod bundle radius, main winding circle radius and transition winding circle radius of each wire-wound rod bundle in the target wire-wound rod bundle assembly, the distance between the rod bundle center and the main winding center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly.

3. The method according to claim 2, characterized in that, The determining the target mapping point of each control point on the target wire-wound rod bundle assembly according to the rod bundle radius, main winding circle radius and transition winding circle radius of each wire-wound rod bundle in the target wire-wound rod bundle assembly, the distance between the rod bundle center and the main winding center, and the initial mapping point of each control point on the target wire-wound rod bundle assembly includes: For each wire-wound rod bundle in the target wire-wound rod bundle assembly, determining the area to be updated on the boundary of this wire-wound rod bundle according to the rod bundle radius, main winding circle radius and transition winding circle radius of this wire-wound rod bundle, and the distance between the rod bundle center and the main winding center, and dividing the area to be updated of this wire-wound rod bundle into a main winding area and a transition winding area; Judging whether there is a first target point among the control points whose initial mapping point falls in the area to be updated of this wire-wound rod bundle; If so, determining the mapping winding area of the initial mapping point corresponding to this first target point from the main winding area and the transition winding area, and determining the target mapping point of this first target point on the target wire-wound rod bundle assembly according to the mapping winding area.

4. The method according to claim 3, characterized in that The determining the area to be updated on the boundary of this wire-wound rod bundle according to the rod bundle radius, main winding circle radius and transition winding circle radius of this wire-wound rod bundle, and the distance between the rod bundle center and the main winding center, and dividing the area to be updated of this wire-wound rod bundle into a main winding area and a transition winding area includes: Determining the transition winding center according to the rod bundle radius, main winding circle radius and transition winding circle radius of this wire-wound rod bundle, and the distance between the rod bundle center and the main winding center; the transition winding circle is tangent to the rod bundle and the main winding circle respectively; Determining the area to be updated on the boundary of this wire-wound rod bundle according to the transition winding center and the rod bundle center; Determining the first polar angle and the second polar angle corresponding to this wire-wound rod bundle according to the transition winding center, the rod bundle center and the main winding center; Determine the region division angle according to the rod bundle radius, main winding wire circle radius, transition winding wire circle radius, first polar angle, and second polar angle of the wire-wound rod bundle; Divide the area to be updated of the wire-wound rod bundle into a main winding wire area and a transition winding wire area according to the region division angle.

5. The method according to claim 3, wherein The method further includes: If among all the control points, there is a mapped point that does not fall on the second target point of the area to be updated of each wire-wound rod bundle, then use the initial mapped point of the second target point as the target mapped point of the second target point on the target wire-wound rod bundle assembly.

6. The method according to claim 1, characterized in that, The determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point includes: Determine the position change amount of each grid point in the initial grid model according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point; Perform position change processing on each grid point in the initial grid model according to the position change amount of each grid point in the initial grid model to obtain the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly.

7. The method according to claim 6, characterized in that, The determining the position change amount of each grid point in the initial grid model according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point includes: Determine the position change amount of each grid point in the initial grid model based on the inverse distance interpolation algorithm according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point.

8. A device for characterizing a wire-wound rod bundle grid model of a nuclear power plant, characterized in that, The device includes: An initial construction module for constructing an initial grid model of a target wire-wound rod bundle assembly; An extraction module for extracting at least two control points from the boundary surface of the initial grid model of the target wire-wound rod bundle assembly; A mapping module for mapping each control point in the initial grid model of the target wire-wound rod bundle assembly onto the target wire-wound rod bundle assembly to obtain the target mapped point of each control point; A model determination module for determining the wire-wound rod bundle grid model of the target wire-wound rod bundle assembly according to the initial grid model of the target wire-wound rod bundle assembly and the position change amount between each control point and the target mapped point of this control point.

9. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the 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 the processor, it implements the steps of the method according to any one of claims 1 to 7.

11. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 7.

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