Numerical simulation modeling method and system for immovable cultural relics

Abstract

The application provides a kind of immovable cultural relic numerical simulation modeling method and system, wherein, method includes: obtaining the point cloud data of immovable cultural relic;According to the point cloud data, the surface contour line of the immovable cultural relic is obtained, and the coordinate point extraction is carried out on the surface contour line, to obtain a plurality of coordinate points;The plurality of coordinate points are fitted to generate a plurality of face domains;The plurality of face domains are subjected to finite element model construction to obtain a finite element model;The finite element model is subjected to meshing to obtain a corresponding three-dimensional grid;The three-dimensional grid is processed to obtain a model simulation result.The application is based on the point cloud data obtained in the early stage, and the modeling is slightly adjusted, the fine modeling is realized, the model is maximized to approach the entity, the simulation result is relatively accurate, and the structure defect position can be revealed, and the performance state of immovable cultural relic can be speculated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of simulation technology, in particular to a kind of immovable cultural relics numerical simulation modeling method and system. BACKGROUND

[0002] The protection concept of immovable cultural relics in China is transitioning from rescue protection to preventive protection, and has made great progress. As an important means of preventive protection of immovable cultural relics, numerous high-techs have been widely used in the daily maintenance of immovable cultural relics. Since the 20th century, with the development of mathematical methods and mechanical theories, computer technology has become more mature, and numerical simulation has become possible to solve various engineering problems such as complex medium and complex boundary. In addition, some heritage sites have a large amount of point cloud data such as 3D laser scanning, close-range photography, and total station. How to reasonably and fully utilize these data is currently a research hotspot and difficulty.

[0003] However, the modeling method in the prior art is relatively rough and has certain differences with the actual structure. SUMMARY

[0004] The present application provides an immovable cultural relics numerical simulation modeling method and system to solve the defect of inaccurate modeling in the prior art and achieve accurate modeling.

[0005] In a first aspect, the present application provides an immovable cultural relics numerical simulation modeling method, comprising:

[0006] obtaining point cloud data of the immovable cultural relics;

[0007] obtaining surface contour lines of the immovable cultural relics according to the point cloud data, and extracting coordinate points from the surface contour lines to obtain a plurality of coordinate points;

[0008] fitting the plurality of coordinate points to generate a plurality of surface domains;

[0009] constructing a finite element model for the plurality of surface domains to obtain a finite element model;

[0010] dividing the finite element model into grids to obtain corresponding three-dimensional grids;

[0011] processing the three-dimensional grids to obtain corresponding model simulation results.

[0012] Further, the present application provides an immovable cultural relics numerical simulation modeling method, wherein the obtaining surface contour lines of the immovable cultural relics according to the point cloud data, and extracting coordinate points from the surface contour lines to obtain a plurality of coordinate points specifically comprises:

[0013] preprocessing the point cloud data to obtain a preprocessed model;

[0014] plane section is performed on the pretreated model to extract a contour line;

[0015] Coordinate points are extracted from the contour line at a preset interval to obtain a plurality of coordinate points.

[0016] Further, the present application provides a numerical simulation modeling method for immovable cultural relics, wherein the pretreatment of the point cloud data to obtain a pretreated model specifically comprises:

[0017] Non-connected points in the point cloud data are deleted to obtain a denoised result;

[0018] The denoised result is encapsulated to obtain an encapsulated result;

[0019] The encapsulated result is filled to obtain the pretreated model.

[0020] Further, the present application provides a numerical simulation modeling method for immovable cultural relics, wherein the plane section is performed on the pretreated model to extract a contour line, specifically comprising:

[0021] A three-dimensional coordinate system is constructed globally for the pretreated model;

[0022] A plane formed by a first dimension and a second dimension in the three-dimensional coordinate system is used to perform plane section on the pretreated model to extract a contour line.

[0023] Further, the present application provides a numerical simulation modeling method for immovable cultural relics, wherein the plurality of coordinate points are fitted to generate a plurality of face domains, specifically comprising:

[0024] All coordinate points in which a first dimension coordinate of each coordinate point in the plurality of coordinate points is within a first range and a second dimension coordinate is within a second range are screened out;

[0025] Each coordinate point in the all coordinate points is refitted according to the original contour line where the coordinate point is located to generate a plurality of face domains.

[0026] Further, the present application provides a numerical simulation modeling method for immovable cultural relics, wherein the plurality of face domains are constructed into a finite element model to obtain a finite element model, specifically comprising:

[0027] Each face domain is converted into an approximate quadrilateral, and four end points of the approximate quadrilateral are determined;

[0028] The four end points of each face domain are numbered in a preset manner; wherein the numbering manners of the plurality of face domains are the same;

[0029] Connecting the same numbered end points of two adjacent face domains, a finite element model is obtained.

[0030] Further, the application provides a numerical simulation modeling method for immovable cultural relics, wherein the three-dimensional grid is processed to obtain a corresponding model simulation result, and the method specifically comprises the following steps:

[0031] The parameters of material properties, analysis steps, assembly, interaction, load and boundary conditions of different three-dimensional grids are determined.

[0032] The corresponding model simulation result is obtained according to the parameters.

[0033] In a second aspect, the application provides a numerical simulation modeling system for immovable cultural relics, comprising:

[0034] A point cloud data acquisition module is configured to acquire point cloud data of immovable cultural relics.

[0035] A coordinate point acquisition module is configured to acquire a surface contour line of the immovable cultural relics according to the point cloud data, extract coordinate points from the surface contour line, and obtain a plurality of coordinate points.

[0036] A face domain generation module is configured to fit the plurality of coordinate points to generate a plurality of face domains.

[0037] A finite element model acquisition module is configured to construct a finite element model for the plurality of face domains, and obtain a finite element model.

[0038] A three-dimensional grid acquisition module is configured to divide the finite element model into a corresponding three-dimensional grid.

[0039] An simulation result generation module is configured to process the three-dimensional grid to obtain a corresponding model simulation result.

[0040] The application further provides a non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the numerical simulation modeling method for immovable cultural relics.

[0041] The application provides a kind of immovable cultural relics numerical simulation modeling method and system, by obtaining the point cloud data of immovable cultural relics;According to the point cloud data, the surface contour line of the immovable cultural relics is obtained, and the coordinate point extraction is carried out on the surface contour line, to obtain a plurality of coordinate points;The plurality of coordinate points are fitted to generate a plurality of face domains;The plurality of face domains are subjected to finite element model construction, to obtain a finite element model;The finite element model is subjected to mesh division, to obtain the corresponding three-dimensional grid;The three-dimensional grid is processed to obtain a model simulation result.The application is based on the point cloud data obtained in advance, and the modeling is slightly adjusted, to realize fine modeling, so that the model is closest to the entity, the simulation result is relatively accurate, and the structure defect position can be revealed to predict the performance state of immovable cultural relics. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0043] Figure 1 is a flowchart of the numerical simulation modeling method of immovable cultural relics provided by the application;

[0044] Figure 2 is a profile extraction and coordinate point diagram of a grotto provided by the application;

[0045] Figure 3 is a face domain diagram of a grotto provided by the application;

[0046] Figure 4 is a finite element model diagram of a grotto provided by the application;

[0047] Figure 5 is a structure diagram of the numerical simulation modeling system of immovable cultural relics provided by the application;

[0048] Figure 6 is a structure diagram of the electronic device provided by the application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the present application will be described clearly and completely in the following with reference to the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0050] The application is described below Figure 1 A numerical simulation modeling method for immovable cultural relics is described, comprising:

[0051] Step 100: Obtain point cloud data of the immovable cultural relics;

[0052] Specifically, if the management unit of the immovable cultural relics has structural point cloud, it can be directly used; if the management unit has no point cloud, it can be obtained through technologies such as unmanned aerial vehicle, three-dimensional laser scanning, total station, etc.

[0053] Step 200: Obtain the surface contour line of the immovable cultural relics according to the point cloud data, and extract the coordinate points of the surface contour line to obtain a plurality of coordinate points;

[0054] Specifically, the obtained point cloud data is processed based on Geomagic software, the surface contour line of the immovable cultural relics is intercepted in the Geomagic software, and the coordinate points are extracted on the contour line at a fixed interval.

[0055] Step 300: Fit the plurality of coordinate points to generate a plurality of surface domains;

[0056] Specifically, the obtained coordinate points are fitted again to generate new surface domains.

[0057] Step 400: Construct a finite element model for the plurality of surface domains to obtain a finite element model;

[0058] Specifically, according to the generated new surface domains, the generated new surface domains are connected in a certain way to form a finite element model, i.e., the new surface domains are combined into a whole.

[0059] Step 500: Divide the finite element model into a corresponding three-dimensional grid;

[0060] Specifically, the obtained finite element model is divided into a plurality of 3D grids.

[0061] Step 600: Process the three-dimensional grid to obtain a corresponding model simulation result.

[0062] Specifically, since the application is calculated by the constructed model, the displacement, stress cloud of the immovable cultural relics under the action of gravity, water flow, temperature, seismic power, etc. is obtained, the dangerous points of the immovable cultural relics are accurately identified, the stress, displacement, deformation, vibration monitoring scheme of the dangerous rock mass is formulated, the daily monitoring of the immovable cultural relics is improved, and data and technical support is provided for the preventive protection of the immovable cultural relics.

[0063] The application provides a kind of immovable cultural relics numerical simulation modeling method, obtains the point cloud data of immovable cultural relics;According to the point cloud data, the surface contour line of the immovable cultural relics is obtained, and the coordinate point extraction is carried out on the surface contour line, to obtain a plurality of coordinate points;The plurality of coordinate points are fitted to generate a plurality of face domains;The plurality of face domains are subjected to finite element model construction, to obtain a finite element model;The finite element model is subjected to grid division, to obtain corresponding three-dimensional grid;The three-dimensional grid is processed, to obtain model simulation result.The application is based on the point cloud data obtained in advance, and the modeling is slightly adjusted, to realize fine modeling, so that the model is closest to the entity, the simulation result is relatively accurate, and the structure defect position can be revealed, and the performance state of immovable cultural relics can be speculated.

[0064] Further, the application provides an immovable cultural relics numerical simulation modeling method, wherein the surface contour line of the immovable cultural relics is obtained according to the point cloud data, and the coordinate point extraction is carried out on the surface contour line to obtain a plurality of coordinate points, specifically comprising:

[0065] The point cloud data is preprocessed to obtain a preprocessed model;

[0066] The preprocessed model is subjected to plane sectioning, and the contour line is extracted;

[0067] The contour line is subjected to coordinate point extraction according to a preset interval, to obtain a plurality of coordinate points.

[0068] Specifically, when the coordinate point extraction is carried out on the contour line of the preprocessed model, the equal-interval extraction is carried out according to the preset interval, so that a plurality of coordinate points can be obtained.Taking a certain grotto as an example, the coordinate point graph can be as shown in Figure 2 .

[0069] Further, the application provides an immovable cultural relics numerical simulation modeling method, wherein the point cloud data is preprocessed to obtain a preprocessed model, specifically comprising:

[0070] Non-connected points in the point cloud data are deleted to obtain a denoised result;

[0071] The denoised result is encapsulated to obtain an encapsulated result;

[0072] The encapsulated result is subjected to defect filling to obtain a preprocessed model.

[0073] Specifically, the acquired point cloud data is subjected to coloring processing, and some non-connected point clouds caused by leaf shielding, fence shielding, etc. are deleted, then the out-of-model isolated points are removed and noise reduction is performed, and after the noise reduction is completed, the point cloud is packaged. After the packaging is completed, the model defects are filled, the feature of the existing sharp point part is deleted, and the grid is smoothed, and finally the packaging is saved, and the saved format is.wrp format. The result of the.wrp format is the preprocessed model.

[0074] Further, the application provides a numerical simulation modeling method for immovable cultural relics, wherein the preprocessed model is subjected to plane section extraction to obtain a contour line, specifically including:

[0075] A global three-dimensional coordinate system is constructed for the preprocessed model.

[0076] A plane formed by a first dimension and a second dimension in the three-dimensional coordinate system is used to perform plane section on the preprocessed model, and a third dimension is used as a position degree to extract a contour line.

[0077] Specifically, the plane section is used to extract the contour line, and the coordinate system is defined as a global coordinate system. For example, the XY axis plane is selected as the section, and the Z direction is selected as the position degree. The smaller the step length of the position degree, the more sections are obtained, the more coordinate points can be extracted, and the closer the fitted surface to the actual situation. Therefore, the number of sections to be cut needs to be determined according to the complexity of the model structure.

[0078] Further, the application provides a numerical simulation modeling method for immovable cultural relics, wherein the plurality of coordinate points are fitted to generate a plurality of surface domains, specifically including:

[0079] All coordinate points in which the first dimension coordinate of each coordinate point in the plurality of coordinate points is in a first range and the second dimension coordinate is in a second range are screened out.

[0080] Each coordinate point in the all coordinate points is subjected to re-fitting according to the original contour line to generate a plurality of surface domains.

[0081] Specifically, the obtained plurality of coordinate points are cut, that is, each coordinate point has three dimension coordinates in the three-dimensional coordinate system. Therefore, in the embodiment of the application, the range of the first dimension coordinate and the range of the second dimension coordinate of different coordinate points are determined, so that the coordinate points in the range are retained, and the coordinate points not in the range are screened out. For example, the first dimension coordinate is the X coordinate, and the second dimension coordinate is the Y coordinate. The points with the X axis coordinate of 100-1000 and the Y axis coordinate in the range of 50-2000 are screened out, and the remaining points are discarded.

[0082] Then, since the extracted points on the original contour line are not in the screening range, the points are screened out, and the points in the screening range are fitted according to the original contour line, that is, the screened points are discarded.

[0083] By re-fitting, a plurality of new fitting lines can be formed, and the area surrounded by the new fitting lines constitutes a new surface domain. Figure 3 The surface domain diagram of the grotto can be referred to as shown in

[0084] Further, the present application provides a numerical simulation modeling method for immovable cultural relics, wherein the finite element model construction is performed on the plurality of surface domains to obtain a finite element model, and the method specifically comprises the following steps:

[0085] Each of the surface domains is converted into an approximate quadrilateral, and four end points of the approximate quadrilateral are determined;

[0086] The four end points of each of the surface domains are numbered in a preset manner; wherein the numbering manners of the plurality of surface domains are the same;

[0087] The end points with the same number of adjacent two surface domains are connected to obtain a finite element model.

[0088] Specifically, four points on the surface domain are found by using ANSYS software, and the quadrilateral formed by connecting the four points is closest to the surface domain, and the four points are numbered, for example, two points with the smallest X coordinate are first selected, and the Y coordinate values of the two points are compared, the point with the smallest Y coordinate value is named as No. 1 point, and the remaining three points are sequentially numbered in a clockwise direction.

[0089] The four points on each of the surface domains are numbered according to the above method, and the points with the same number of adjacent two surface domains are connected to obtain a finite element model, as shown in Figure 4 The model is saved in.iges format.

[0090] Further, the present application provides a numerical simulation modeling method for immovable cultural relics, wherein the finite element model is meshed to obtain a corresponding three-dimensional grid, and the method specifically comprises the following steps:

[0091] The finite element model is meshed by using HyperMesh software to obtain a corresponding three-dimensional grid.

[0092] Specifically, the obtained.iges format model is imported into Geomagic software, saved as.sat format, the.sat file is imported into HyperMesh software, and the surface 2D grid is divided first, then the 3D grid is divided, and the grid file is saved as.inp format.

[0093] Further, the application provides a numerical simulation modeling method for immovable cultural relics, wherein the three-dimensional grid is processed to obtain a corresponding model simulation result, and the method specifically comprises:

[0094] determining parameters of material properties, analysis steps, assembly, interaction, load and boundary conditions of different three-dimensional grids;

[0095] obtaining a corresponding model simulation result according to the parameters.

[0096] Further, the application provides a numerical simulation modeling method for immovable cultural relics, wherein the material properties include structural deformation modulus, Poisson's ratio, cohesion, internal friction angle, density and compressive strength.

[0097] Specifically, the obtained three-dimensional grid is input into ABAQUS software, and corresponding numerical values are input according to actual needs, and corresponding numerical values are input for material properties including structural deformation modulus, Poisson's ratio, cohesion, internal friction angle, density and compressive strength.

[0098] Assembly setting: import each part model of the grotto into the assembly, and assemble the models together through moving, rotating and other operations.

[0099] Analysis step setting: setting the initial increment step, the minimum increment step and the maximum increment step.

[0100] Interaction setting: since the model is divided into blocks for modeling, constraints need to be added in the interaction module to combine each part into a whole and bear stress together.

[0101] Load and boundary condition setting: only gravity load is added in the example; the left and right sides are constrained in the X direction displacement, the back is constrained in the Z direction displacement, and the bottom is constrained in the Y direction displacement.

[0102] After the above parameter setting is completed, the calculation is submitted, and after the calculation is completed, the post-processing result is viewed, such as stress nephogram, displacement nephogram and the like.

[0103] In combination with Figure 5 the application provides a numerical simulation modeling system for immovable cultural relics, comprising:

[0104] a point cloud data acquisition module 51 for acquiring point cloud data of immovable cultural relics;

[0105] The coordinate point acquisition module 52 is configured to acquire the surface contour line of the immovable cultural relic according to the point cloud data, and extract coordinate points from the surface contour line to obtain a plurality of coordinate points.

[0106] The surface domain generation module 53 is configured to fit the plurality of coordinate points to generate a plurality of surface domains.

[0107] The finite element model acquisition module 54 is configured to construct a finite element model for the plurality of surface domains to obtain the finite element model.

[0108] The three-dimensional grid acquisition module 55 is configured to divide the finite element model into a corresponding three-dimensional grid.

[0109] The simulation result generation module 56 is configured to process the three-dimensional grid to obtain a corresponding model simulation result.

[0110] The device provided by the embodiment of the present application can be used to execute the method described in the above embodiment, and has similar working principles and beneficial effects, so the details are not described here, and the specific content can be referred to the introduction of the above embodiment.

[0111] The present application provides an immovable cultural relic numerical simulation modeling system, which acquires point cloud data of an immovable cultural relic, acquires a surface contour line of the immovable cultural relic according to the point cloud data, extracts coordinate points from the surface contour line to obtain a plurality of coordinate points, fits the plurality of coordinate points to generate a plurality of surface domains, constructs a finite element model for the plurality of surface domains to obtain the finite element model, divides the finite element model into a corresponding three-dimensional grid, and processes the three-dimensional grid to obtain a model simulation result.

[0112] Figure 6 An example of a schematic diagram of an entity structure of an electronic device is shown in FIG. 1. Figure 6As shown, the electronic device can include a processor 610, a communications interface 620, a memory 630, and a communications bus 640, wherein the processor 610, the communications interface 620, and the memory 630 complete mutual communication through the communications bus 640. The processor 610 can invoke a logical instruction in the memory 630 to execute a non-removable cultural relic numerical simulation modeling method, which includes: acquiring point cloud data of a non-removable cultural relic; acquiring a surface contour line of the non-removable cultural relic according to the point cloud data, and extracting coordinate points of the surface contour line to obtain a plurality of coordinate points; fitting the plurality of coordinate points to generate a plurality of surface domains; constructing a finite element model for the plurality of surface domains to obtain the finite element model; dividing the finite element model into a corresponding three-dimensional grid; and processing the three-dimensional grid to obtain a corresponding model simulation result.

[0113] In addition, the logical instruction in the memory 630 described above can be implemented in the form of a software function unit and sold or used as an independent product, which can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0114] On the other hand, the present application also provides a computer program product, which includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute a non-removable cultural relic numerical simulation modeling method provided by the above-mentioned method, which includes: acquiring point cloud data of a non-removable cultural relic; acquiring a surface contour line of the non-removable cultural relic according to the point cloud data, and extracting coordinate points of the surface contour line to obtain a plurality of coordinate points; fitting the plurality of coordinate points to generate a plurality of surface domains; constructing a finite element model for the plurality of surface domains to obtain the finite element model; dividing the finite element model into a corresponding three-dimensional grid; and processing the three-dimensional grid to obtain a corresponding model simulation result.

[0115] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements a non-removable cultural relic numerical simulation modeling method provided by each of the above methods. The method comprises: obtaining point cloud data of a non-removable cultural relic; obtaining a surface contour line of the non-removable cultural relic according to the point cloud data, and extracting coordinate points of the surface contour line to obtain a plurality of coordinate points; fitting the plurality of coordinate points to generate a plurality of surface domains; constructing a finite element model for the plurality of surface domains to obtain a finite element model; meshing the finite element model to obtain a corresponding three-dimensional grid; and processing the three-dimensional grid to obtain a corresponding model simulation result.

[0116] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the present embodiment scheme according to actual needs. Those skilled in the art can understand and implement it without creative labor. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for modeling a non-removable cultural relic value simulation, characterized in that, The method comprises the following steps: acquiring point cloud data of an immovable cultural relic; acquiring a surface contour line of the immovable cultural relic according to the point cloud data, and extracting coordinate points of the surface contour line to obtain a plurality of coordinate points, comprising: preprocessing the point cloud data to obtain a preprocessed model; performing plane sectioning on the preprocessed model to extract a contour line; extracting coordinate points from the contour line at a preset interval to obtain a plurality of coordinate points; fitting the plurality of coordinate points to generate a plurality of face domains, comprising: screening all coordinate points in the plurality of coordinate points whose first dimension coordinate is within a first range and whose second dimension coordinate is within a second range; re-fitting each coordinate point in the all coordinate points according to the original contour line where the coordinate point is located to generate a plurality of face domains; constructing a finite element model for the plurality of face domains to obtain a finite element model, comprising: converting each face domain into an approximate quadrilateral and determining four end points of the approximate quadrilateral; numbering the four end points of each face domain in the following preset manner: selecting two points with the smallest X coordinate from the four end points; comparing the Y coordinate values of the two points, and naming the point with the smallest Y coordinate value as No. 1 point, and then numbering the remaining three points in a clockwise direction; connecting the end points with the same number of adjacent two face domains to obtain a finite element model; dividing the finite element model into a corresponding three-dimensional grid; processing the three-dimensional grid to obtain a corresponding model simulation result.

2. The method of claim 1, wherein, The preprocessing of the point cloud data to obtain the preprocessed model specifically comprises: deleting non-connected points in the point cloud data to obtain a denoised result; encapsulating the denoised result to obtain an encapsulated result; filling in the missing parts of the encapsulated result to obtain the preprocessed model.

3. The method of claim 1, wherein, The plane sectioning of the preprocessed model to extract the contour line specifically comprises: globally constructing a three-dimensional coordinate system for the preprocessed model; performing plane sectioning on the preprocessed model to extract the contour line, with a plane formed by the first dimension and the second dimension in the three-dimensional coordinate system as the position degree of the third dimension.

4. The method of claim 1, wherein, The processing of the three-dimensional grid to obtain the corresponding model simulation result specifically comprises: determining the parameters of material properties, analysis steps, assembly, interaction, load and boundary conditions of different three-dimensional grids; obtaining the corresponding model simulation result according to the parameters.

5. An immovable cultural relic numerical simulation modeling system, characterized in that, The method comprises the following steps: a point cloud data acquisition module for acquiring point cloud data of an immovable cultural relic; a coordinate point acquisition module for acquiring a surface contour line of the immovable cultural relic according to the point cloud data, and extracting coordinate points of the surface contour line to obtain a plurality of coordinate points, comprising: preprocessing the point cloud data to obtain a preprocessed model; performing plane sectioning on the preprocessed model to extract a contour line; extracting coordinate points from the contour line at a preset interval to obtain a plurality of coordinate points; a face domain generation module for fitting the plurality of coordinate points to generate a plurality of face domains, comprising: screening all coordinate points in the plurality of coordinate points, each of which has a first dimension coordinate within a first range and a second dimension coordinate within a second range; re-fitting each of the all coordinate points according to the original contour line where the coordinate point is located to generate a plurality of surface domains; a finite element model acquisition module, configured to construct a finite element model for the plurality of surface domains to obtain a finite element model, comprising: converting each of the surface domains into an approximate quadrilateral and determining four end points of the approximate quadrilateral; numbering the four end points of each of the surface domains in a preset manner as follows: selecting two points with the smallest X coordinates from the four end points; comparing the values of Y coordinates of the two points, naming the point with the smallest Y coordinate value as No. 1 point, and then numbering the remaining three points in a clockwise direction; connecting the end points with the same number of adjacent two surface domains to obtain a finite element model; a three-dimensional grid acquisition module, configured to divide a grid for the finite element model to obtain a corresponding three-dimensional grid; a simulation result generation module, configured to process the three-dimensional grid to obtain a corresponding model simulation result.

6. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the steps of the immovable cultural relic numerical simulation modeling method according to any one of claims 1 to 4 when executing the program.

7. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program implements the steps of the immovable cultural relic numerical simulation modeling method according to any one of claims 1 to 4 when executed by the processor.

Images