104 results about "Quadrilateral grid" patented technology

The invention discloses a curved surface quadrilateral dominant grid generation method, device and equipment for an aircraft and a storage medium, and relates to the technical field of computational fluid mechanics, and the method comprises the steps: creating a surface unstructured grid based on surface grid generation parameters of a CAD file of the aircraft, carrying out the conformal mapping of the surface unstructured grid to a parameter domain plane, and calculating the vertex compression ratio of each grid vertex; selecting the current starting point with the minimum compression ratio and the maximum to-be-compared vertex in the adjacency list, and determining the current to-be-processed vertex with the minimum compression ratio in the adjacent vertexes and the advancing direction; determining to-be-processed discrete points according to the current compression ratio and the coordinate information to generate a current isoline, if the current compression ratio does not exceed a threshold value, iteratively updating the current starting point, and skipping to the step of determining the current to-be-processed vertex again; the discrete points are projected to the outer-layer isolines according to the isoline sequence, and the curved-surface quadrilateral dominant grid is generated based on the distance proportion between each discrete point and the projection point, so that the generation efficiency of the curved-surface quadrilateral grid is improved.

The invention discloses a method for generating a structure domination surface grid based on frame field guidance. The method comprises the following steps: step 1, calculating a frame field with an aligned boundary and curvature for an input background triangular grid; 2, decomposing the background triangular mesh into a plurality of partitions; step 3, quantizing the edge of the partition obtained by decomposition to obtain the final discrete segment number of the edge of the partition; step 4, generating background triangular grids of the partitions and setting a frame field; step 5, establishing and initializing a boundary table of each partition; step 6, selecting an edge with the highest priority from the boundary table as a front edge, namely the bottom edge of the quadrangle, and then calculating two side edge points at the two ends of the edge to obtain two side edges of the quadrangle; 7, connecting the top edges to obtain a quadrangle; 8, updating the background grid and the boundary table; and step 9, carrying out post-processing on the generated grid. The grid which is mainly composed of the quadrilateral units and is generated by the method has great advantages in the aspects of overall conformality and grid scale.

The invention belongs to the field of composite material structure optimization design, and particularly relates to a modeling method of a variable stiffness composite material laminated plate based on a finite element. The method comprises the following steps: defining parameters of a composite laminated plate model; compiling a script file by utilizing a programming language, and dividing a quadrilateral grid; calculating geometric coordinates of the unit center points; calculating the fiber direction angle of each unit under the central point coordinate layer by layer and fiber by fiber, taking the fiber direction angle as the fiber direction angle of the corresponding unit in the current paving layer, and updating the fiber paving layer number of the unit; defining material attributes; defining boundary conditions and loads; generating a calculation input file from the finite element model, and submitting the calculation input file to corresponding finite element software for analysis so as to realize finite element automatic modeling of the variable-stiffness composite laminated plate; according to the method, the problems that variable-angle laying layers need to be input one by one, and efficiency is low are solved, and finite element automatic modeling of the porous structure and the bent plate can be achieved.

The invention discloses a flood dynamic display method and device, equipment, a medium and a product. The method comprises the steps of performing grid reconstruction on irregular quadrilateral grid data at a plurality of moments based on a triangulated irregular network algorithm, and generating first triangular grid data at the plurality of moments; extracting a target quadrilateral grid from the irregular quadrilateral grid data at multiple moments; determining second triangular mesh data at multiple moments corresponding to the target quadrilateral mesh in the first triangular mesh data at multiple moments; constructing an index structure of the second triangular mesh data based on the index identifier, the first mapping relationship and the second mapping relationship; based on the second triangular mesh data and the index structure, generating a to-be-rendered dynamic water surface data set; and based on a time sequence and a multi-normal superposition rendering technology based on a graphic interface, generating visual data representing dynamic changes of the water surface. In this way, the visualization effect and performance of flood routing simulation are improved.

The invention provides a comprehensive scene map path planning method based on an improved A * algorithm, and the method comprises the steps: 1, carrying out environment modeling for a comprehensive scene map: segmenting a two-dimensional plane scene into more than two square grids, and carrying out the assignment of a single grid in a binarization manner to represent the occupation condition of the grids; constructing a protection area formed by a single-layer grid around the obstacle, and filling the protection area into gray; step 2, planning a path by adopting an improved A * algorithm: step 2-1, establishing an improved bidirectional search strategy; step 2-2, establishing a heuristic function with a barrier linear density weight; step 2-3, adopting a variable neighborhood node expansion mode to complete node expansion; and step 2-4, carrying out path secondary optimization. According to the method, the planning efficiency and the path performability in a complex environment are remarkably improved, and an effective solution is provided for navigation systems in the fields of service robots, intelligent warehousing and the like.

The invention belongs to the field of space-time big data, and discloses a remote sensing image indexing and storing method based on a Uber H3 hexagonal grid, which comprises the following steps of: 1, for remote sensing images with different resolutions, cutting the remote sensing images by adopting Uber H3 grids with different resolutions; 2, storing the generated remote sensing image slices into different nodes according to a Hash code (consistent hash ring) and a remote sensing image slice storage algorithm; 3, generating a Main Table, a secondary index table and a B + tree while storing the remote sensing image slices; and 4, in combination with the generated Main Table, the secondary index table and the B + tree, selecting a KNN query algorithm, a spatio-temporal range query algorithm and other algorithms according to query requirements to obtain target data. Compared with a Google S2 remote sensing image storage index method based on a quadrilateral grid and a Uber H3-based remote sensing image storage index method without applying hash, a B + tree and a secondary index table, the storage efficiency of BSH3 is better than that of S2 and H3.

The invention discloses a polygonal and quadrilateral mesh automatic subdivision method based on deep reinforcement learning, relates to the field of computational geometry and mesh generation, and constructs an automatic subdivision framework fusing geometric priori knowledge and a data driving strategy. According to the method, nine basic topology filling templates covering triangles to hexagons are predefined as discrete action spaces, and continuous geometric segmentation is converted into a sequence decision problem; learning a mapping relation between the polygon state characteristics and the optimal template selection strategy by using a deep Q network, and balancing exploration and utilization through a dynamic epsilon-greedy mechanism; and in combination with a vertex number priority scheduling strategy and a multi-dimensional quality award function, guiding an intelligent agent to adaptively generate a high-quality quadrilateral grid. According to the method, full-automatic and high-robustness subdivision of the complex polygon area is achieved, the grid orthogonality and the length-width ratio quality are remarkably improved, manual intervention is avoided, and the method is suitable for engineering scenes such as finite element analysis.

The invention discloses a quadrilateral mesh generation method based on the Poincare theorem, and relates to the field of numerical simulation of fluid mechanics, and the method comprises the steps: S1, in the process of generating triangulation of a complex shape part of a spacecraft, converting a complex anisotropic topological structure into isotropic topology based on the topological characteristics of the Poincare theorem, and generating a quadrilateral mesh; further generating an unstructured grid; s2, combining the shortest distance with the coordinates of the grid points to obtain a shortest distance field, and solving the gradient of the shortest distance field to obtain a corresponding gradient field; s3, selecting a plurality of initial points covering the whole geometric region on the boundary of the complex shape component of the spacecraft, and taking the initial points as the starting points of streamline tracking to extract a streamline; and S4, forming a closed polygon based on the streamlines, the wall surface boundary points and intersection points of the streamlines and the far field, and completing generation of a quadrilateral grid. The invention provides a quadrilateral mesh generation method based on the Poincare theorem. The overall quality of a mesh and the stability of the generation process can be effectively ensured.

The utility model discloses a steel structure cooling tower consisting of double-layer trilateral and quadrilateral units. The cooling tower consists of an upper part and a lower part, the lower part is formed by connecting and combining double-layer trilateral units according to a certain rule, and each double-layer trilateral unit is a double-layer reticulated shell formed by connecting a trilateral outer side chord member and a trilateral inner side chord member through a series of web members; the upper part is formed by connecting and combining double-layer quadrilateral units according to a certain rule, and each double-layer quadrilateral unit is a double-layer reticulated shell formed by connecting a quadrilateral outer side chord member and a quadrilateral inner side chord member through a series of web members. According to the double-layer steel structure cooling tower, the internal force conduction path of the double-layer steel structure cooling tower under the action of lateral force is optimized, the space stress performance is good, the stability of the structure is guaranteed, and the overall steel consumption is further reduced. Through connection and assembly of modular unit assemblies, standardized design, industrial production and fabricated construction of the cooling tower structure are achieved.

The invention discloses a geometric model quadrilateral mesh generation method and system based on GPU parallelism, and belongs to the technical field of computer graphics. The method comprises the following steps: for a geometric model formed by a plurality of surfaces, obtaining parameterized coordinates of surface patches in parallel by a GPU thread, and performing spatial transformation on the parameterized coordinates by establishing a bounding box of the surface patches to obtain a surface patch splicing result; generating an original triangular mesh model based on a patch splicing result, and processing triangular units in the original triangular mesh model in parallel by the GPU thread to obtain a triangular mesh after cavity filtering and network geometric information of the triangular mesh; the GPU thread solves the network topology structure of the triangular mesh in parallel; the GPU thread performs parallel solution of the frame field based on the network geometric information and the network topology information of the triangular mesh; and generating a quadrilateral grid structure of the geometric model in combination with the frame field. According to the method, the grid structure generation efficiency is improved by improving the calculation performance of the curved surface frame field.

The utility model discloses a silicon capacitor electrode structure and a silicon capacitor, which can further improve the capacitance of a capacitor in a limited space by nesting, combining and arranging a plurality of groups of element arrays distributed in a quadrilateral grid mode more reasonably and precisely, so that the capacitor can store more charges.

The present application provides a valve stent, a method for processing a valve stent, and an artificial valve. The valve stent is formed by cutting a metal tube and has a cut state and an expanded state. The valve stent comprises a plurality of grid cell structure units distributed in a circumferential direction of the valve stent and extending in an axial direction of the valve stent. Each grid cell structure unit comprises a plurality of quadrilateral grid cells, and the plurality of quadrilateral grid cells comprise at least one end grid cell proximal to the heart, at least one middle supporting grid cell and at least one end grid cell distal to the heart that are sequentially arranged from a first axial end to a second axial end in the axial direction of the valve stent. Each quadrilateral grid cell comprises four stent rods sequentially connected end to end. Each stent rod comprises a straight rod section and a connecting section. In the cut state, the straight rod sections of two stent rods, opposite to each other in the circumferential direction of the valve stent, of each quadrilateral grid cell gradually diverge from each other from the middle to the end of the quadrilateral grid cell in the axial direction to form an included angle, wherein the included angle of the middle supporting grid cell is less than or equal to 12 degrees.

The invention discloses a method for generating a high-precision three-dimensional terrain model. The method comprises the following steps: S1, collecting geographic information data; collecting geographic information data of the target area by using the unmanned aerial vehicle; s2, data preprocessing, wherein the data preprocessing comprises precision correction, image splicing and three-dimensional reconstruction; s3, data storage and management; storing the processed data in a spatial database; step S4, generating a grid; discretizing the elevation data to generate a regular quadrilateral grid; step S5, carrying out elevation interpolation; elevation interpolation calculation is carried out on each grid node; step S6, constructing a three-dimensional terrain; a three-dimensional terrain model is generated according to the grid nodes and the elevation interpolation result; and S7, optimization and refinement are carried out. And optimizing the generated three-dimensional terrain model. Through the method provided by the invention, the efficiency and precision of three-dimensional terrain model generation are improved, so that the generated terrain model is finer, and actual terrain features can be truly reflected.

The invention provides a quadrilateral surface re-topology method based on frame field prediction and electronic equipment. The quadrilateral surface re-topology method based on frame field prediction comprises the following steps: inputting a triangular mesh model into a frame field neural network model, and carrying out direction regression and amplitude diffusion taking the direction as the condition to obtain a corresponding frame field; performing deformation based on the frame field to obtain a deformed grid model; performing isotropic quadrilateral re-mesh division on the deformed mesh model to obtain an initial quadrilateral mesh model; and performing inverse deformation on the initial quadrilateral mesh model to obtain a quadrilateral mesh model corresponding to the triangular mesh model. Through the steps of frame field inference, deformation, isotropic quadrilateral grid re-division and inverse deformation, the quality of the finally generated quadrilateral grid is ensured, so that the purpose of improving the quality of the quadrilateral grid is achieved.

The invention discloses a full-quadrilateral grid generation method based on a predefined mode, and particularly relates to the technical field of grid generation, and the method comprises the specific steps: cleaning a geometric model, setting a predefined mode of grid generation according to the cleaned geometric model, and defining a grid generation rule, the method comprises the following steps: carrying out grid division according to a geometric model and a predefined mode, generating a full-quadrilateral grid based on an overlay network technology, carrying out cooperative scheduling on generation of the full-quadrilateral grid by utilizing a mode based on a distributed architecture platform, optimizing the full-quadrilateral grid by utilizing a post-processing technology, and carrying out quality inspection on the generated full-quadrilateral grid. According to the method, the generation efficiency of the full-quadrilateral grid is evaluated by combining the result of quality inspection of the full-quadrilateral grid and the calculation precision in the grid generation process, and a grid quality control strategy is provided according to the evaluation result, so that the contradiction between data consistency and processing speed when a large-scale complex geometric model is processed is effectively solved.

The invention discloses a three-dimensional surface reconstruction method and system based on single-frame real-time point cloud. The method comprises the following steps: collecting material surface point cloud data in real time; transferring the collected point cloud data from a laser radar coordinate system to a getting-off coordinate system, and filtering interference point cloud to obtain first point cloud data; converting the first point cloud data into a cylindrical coordinate system from a getting-off coordinate system, dividing the selected material area into a plurality of fan-shaped grids in the cylindrical coordinate system, and projecting the first point cloud data into each fan-shaped grid; calculating centroids of all points in each grid as grid sampling points; if the point set in the grid is empty, carrying out sampling point supplement on the empty grid; and constructing a quadrilateral grid based on the complemented grid sampling points and the grid indexes to which the grid sampling points belong, and rendering the quadrilateral grid to obtain a three-dimensional reconstruction result of the material surface. According to the method, the overall estimation value of the material area is completed on the basis of the data of the single-frame point cloud, and the timeliness and the construction quality of excavator construction are effectively improved.

The invention relates to an analytical calculation method for axial magnetic pulling force of an electric propulsion conical permanent magnet motor of an electric aircraft. A segmented equivalent method and an equivalent magnetic network method are combined, a conical motor is equivalent to a multi-segment cylindrical motor, three-dimensional modeling is converted into two-dimensional section modeling, the calculation complexity is reduced, meanwhile, the motor section change, the magnetic circuit saturation influence and the specific distribution of an air gap magnetic field are fully considered, the calculation accuracy is close to that of a finite element method, and the calculation efficiency is improved. The calculation speed is obviously higher than that of a finite element method. According to the method, the magnetic field distribution is prevented from being predicted in advance before modeling, and the modeling thought is simplified. Meanwhile, according to the method, grid subdivision is simplified, a quadrilateral grid in a standard shape is constructed as much as possible, grid direction magnetic conductance and branch magnetic conductance can be calculated through a unified formula, and modeling efficiency is improved.

The present invention discloses a finite element calculation method for solidification heat transfer during continuous casting of round billets, and relates to the technical field of steel continuous casting. The method comprises establishing a two-dimensional geometric model of the round billet according to the cross-sectional dimensions of the round billet; meshing the two-dimensional geometric model of the round billet to construct a two-dimensional finite element model of the round billet; establishing a two-dimensional finite element solidification heat transfer model of the round billet in view of the problem of solidification heat transfer during continuous casting of the round billet; and calculating the temperature field change during continuous casting using the two-dimensional finite element solidification heat transfer model of the round billet. The method fully considers the arc-shaped boundary of the round billet, and adopts general quadrilateral units. When the grid is dense enough, the arbitrary curve of the boundary of the calculation area can be simulated by a segmented straight line on the boundary, while avoiding the serrated boundary caused by the use of rectangular units; the calculation accuracy of the calculation using the finite element method is improved compared with the calculation accuracy of the finite difference method and the like; the appropriate boundary conditions are selected according to the different cooling conditions of the crystallizer and the secondary cooling zone, so as to more accurately simulate the heat transfer phenomenon during the actual continuous casting production process of the round billet.

The utility model relates to a side length reinforced geogrid which comprises a plurality of regular hexagon units arranged in a determinant mode and quadrilateral units located in the regular hexagon units, and the four corners of each quadrilateral unit are located on the four side edges of the corresponding regular hexagon unit respectively. First reinforcing ribs which are arranged in a crossed mode and serve as rectangular diagonals are further arranged in the quadrilateral units. The quadrangle units are arranged in the regular hexagon units, the corners of the quadrangle are located on the four side lengths of the hexagon, and therefore the strength of the side lengths of the regular hexagon units is enhanced, meanwhile, the strength of the side lengths of the regular hexagon units is further enhanced through the arrangement of the first reinforcing ribs, and the stress strength of the corners of the quadrangle is improved; the interlocking effect is improved, and meanwhile the supporting strength in the quadrangle is enhanced.

The invention relates to a metamaterial, in particular to a thermal expansion and Poisson's ratio integrated adjustable two-dimensional metamaterial cell element and a combination thereof. The invention aims to provide a thermal expansion and Poisson's ratio integrated and adjustable metamaterial cell element, which has the characteristics of adjustable thermal expansion coefficient and adjustable Poisson's ratio. The technical scheme is a thermal expansion and Poisson's ratio integrated adjustable two-dimensional metamaterial cell element. The two-dimensional metamaterial cell element is characterized by comprising a quadrilateral unit and two semi-arrow units, wherein the quadrilateral unit is formed by sequentially connecting two first connecting rods and two second connecting rods end to end; each semi-arrow unit is formed by connecting one end of a third connecting rod with one end of a fourth connecting rod; wherein the connecting point of the first connecting rod and the second connecting rod is further connected with the other end of the third connecting rod, the two fourth connecting rods are coaxially arranged and pass through the connecting point of the two second connecting rods, and the first connecting rod, the second connecting rods, the third connecting rod and the fourth connecting rods are coplanar.

The embodiment of the invention provides a mesh generation method for an additive manufacturing slice type multilayer structure. The mesh generation method can solve the technical problem that the mesh generation capacity is poor in the prior art. The method includes dividing a surface grid on a first surface and converting a second surface into a point cloud result. And matching the grid nodes and the surface nodes according to process constraints to obtain surface node pairs. In this way, not only the geometrical shape is considered, but also the additive manufacturing layering process is considered. And according to the surface node pairs, based on the quadrilateral grids, dividing layered finite element units mainly comprising hexahedrons, that is, generating volume grids through the surface grids. According to the method, the stability of various spatial curved surfaces is ensured while rapid grid division is realized, and a grid division algorithm which is high in automation degree, good in stability and good in grid quality is realized. The additive manufacturing slice type multilayer structure is subjected to grid division, the material direction and the layering direction are accurately appointed, and the efficiency and accuracy of simulation calculation of the additive manufacturing slice type multilayer structure are improved.

The invention provides a fan blade topological optimization method based on a truss-continuum hybrid grid finite element model, and belongs to the technical field of fan blade optimization design. According to the method, a quadrilateral unit is adopted to simulate a composite material base body in the fan blade, a truss unit is adopted to simulate reinforced fibers in the fan blade, a truss-continuum mixed mesh finite element model is constructed, topological optimization is performed on the basis of the truss-continuum mixed mesh finite element model, and therefore the composite material base body in the fan blade is simulated. The structural difference between the composite material matrix and the reinforced fibers is comprehensively considered, the optimization accuracy can be improved, and the expected requirement is met.

The application aims to provide a stress-based 3D printing continuity path planning method. The application obtains a to-be-printed model, discretizes the to-be-printed model into a hexahedral grid, the side length of the grid is twice the printing path width, and the height is the pre-printed layer thickness, and the principal stress field is obtained by using finite element analysis. Since the path is generated on a two-dimensional quadrilateral grid, the principal stress direction field is projected onto the two-dimensional domain. For the stress value of the unit close to zero, the stress direction is arbitrary, a method of uniform principal stress direction field is proposed, the stress line is extracted from the principal stress direction field, a plurality of connection rules are adopted, the isolated points are eliminated, and the continuity is optimized. Finally, each stress line is offset to generate a path with a closed loop, and different paths are connected to generate a globally continuous path. In addition, the extrusion rate is adjusted adaptively according to the path direction to alleviate the overfilling problem caused by grid discretization. The model printed by the method has strong mechanical properties under the premise of guaranteeing the surface quality and the curved surface accuracy.

The invention discloses a wing quadrilateral unit structure finite element model automatic construction method and device, equipment and a medium, and relates to the technical field of aerospace, and the method comprises the steps: determining third coordinate data of a wing middle section based on a target control parameter, first coordinate data of a wing root section and second coordinate data of a wing tip section; based on the first coordinate data, the second coordinate data and the third coordinate data, constructing an airfoil geometric parameterized model by utilizing a preset interpolation method, generating target grid control points and target grid control edges corresponding to the wing root section, the wing tip section and the wing middle section respectively, and determining a first grid control edge connecting the wing root section and the wing middle section, the second grid control edge is connected with the wing middle section and the wing tip section; and determining a wing quadrilateral unit structure finite element model file based on the first quadrilateral mesh of the skin, the second quadrilateral mesh of the wing rib and the third quadrilateral mesh of the wing spar. And a high-fidelity structural finite element model is efficiently constructed.

A computer-implemented method and apparatus for generating a quadrilateral grid from an image with an alpha channel. The method includes receiving an image with an alpha channel depicting a shape mapped onto a 3D surface, vectorizing the shape to create a vector path, determining corners by calculating a centroid and identifying the points, correcting a winding order to ensure a clockwise orientation, constructing a quadrilateral grid by setting sub-paths based on detected corners, resampling the sub-paths to match specified rows and columns, performing weighted interpolation across the grid using inverse square distance weighting, and outputting the generated quadrilateral grid for display on a computer device. The apparatus comprises a processor configured to execute these steps, including vectorizing the shape, determining corners, correcting the winding order, constructing and resampling the grid, performing weighted interpolation, and subdividing the 3D mesh for flexible manipulation and extrapolation.

The invention provides a communication system operation and maintenance management method and system applying data analysis, and relates to the technical field of data processing.The method comprises the steps that 1, original data streams of equipment operation data and service data are collected in real time, the original data streams are divided according to a preset time window, and the divided original data streams are obtained; mapping the multi-dimensional data in each window into a point cloud data set in a high-dimensional space; 2, based on the point cloud data set, spatial distribution characteristics are extracted through principal component analysis, and a virtual reference plane representing the state is constructed; and step 3, delimiting an initial quadrilateral grid on the virtual reference plane, and performing adaptive segmentation on the initial grid according to the density gradient of the point cloud data set to form heterogeneous sub-regions. According to the invention, real-time accurate early warning of communication system abnormity, rapid fault positioning and predictive maintenance based on trend analysis are realized, and the intelligent level of operation and maintenance management and the reliability of the system are effectively improved.

The application discloses a kind of thermal-mechanical-phase field coupling simulation methods of concrete mesoscopic thermal cracking, the present application is based on the numerical simulation method of mesoscopic concrete thermal cracking based on phase field theory, comprising the following steps: establishing mesoscopic concrete model, mainly including aggregate mortar and interface transition zone;According to the thermodynamic parameters of each component of mesoscopic concrete obtained according to data reference or physical test;Determine the thermodynamic boundary condition according to the environment of concrete;Free triangle or quadrilateral element is used to disperse mesoscopic concrete model, and determine solving error;Thermal-mechanical-phase field damage coupling model is used to solve the cracking process of concrete model under the action of temperature.The application considers the heterogeneous structure of concrete, establishes a thermal-mechanical damage coupling model based on the phase field fracture theory, and the coupling mode is more in line with engineering practice, which can provide calculation basis for concrete cracking caused by temperature and provide guiding opinions for safety evaluation of hydraulic concrete structure.

The embodiment of the invention discloses a multilateral hole filling method based on a generalized non-uniform rational B spline, and the scheme can comprise the following steps: for a multi-pipe mixed connection problem, firstly, fitting a boundary curve by using a uniform rational B spline curve, for example, in a three-pipe mixed connection problem, the boundary curve is a boundary curve of a pipe curved surface and a constructed connection curved surface, and the boundary curve is a boundary curve of a pipe curved surface and a constructed connection curved surface; then constructing a quadrilateral grid as a control grid according to the fitted curve, and generating an initial GNURBS curved surface; and finally, a control point of the GNURBS curved surface is adjusted through energy optimization, so that a smooth filling curved surface meeting normal constraint and curvature constraint is obtained, for example, in the multi-pipe mixed connection problem, the filling curved surface is a mixed connection curved surface for connecting the boundaries of a plurality of pipes.

The invention discloses a method for creating a long-distance closed mesh surface model, electronic equipment and a storage medium, and the method comprises the steps: obtaining the position of a reference line in a three-dimensional space based on a route design result of linear engineering; analyzing the cross section graph, and constructing cross section component data; establishing a constraint relation of points in the cross section graph based on the reference point, and configuring a label for each constraint; generating an initial stake number list according to a preset segment interval, and dynamically inserting encryption points based on the curve type and combining the encryption points into the initial stake number list to form a final stake number list; mapping corresponding points in the cross section to a three-dimensional space according to the relative coordinates and the plane unit normal vector, and generating a cross section placement list; and on the basis of the cross section placement list and the cross section component data, constructing quadrilateral grids between adjacent cross sections, splicing the quadrilateral grids to generate transition grid surfaces, and forming a closed grid surface model by combining starting and ending transverse grids. According to the method, the precision and efficiency of long-distance linear engineering three-dimensional modeling are remarkably improved.

The invention provides an intelligent grid optimization method and system based on domestic general scientific calculation software, and the method comprises the steps: obtaining and analyzing a grid data file, and obtaining the connection relation information of nodes and units in a grid; converting the grid into a graph structure based on the connection relation information, and inputting the graph structure into a grid smoothing model for optimization to obtain a high-quality grid; the grid smoothing model is obtained by training based on a grid data set in advance; the grid data set is obtained by constructing a geometric shape and randomly adjusting grid points in advance; determining that the grid smoothing model is successfully trained after the loss function is converged; the loss function is obtained by calculating the side length and angle of each grid unit in the grid data set. According to the method, the unsupervised loss function oriented to structured grid smoothing is designed, the unsupervised grid smoothing model oriented to the large-scale structured quadrilateral grid is constructed and trained, nodes of different degrees are smoothed, the method is not influenced by a data input sequence, and the optimization efficiency is improved while the grid optimization quality is improved.