34 results about "Finite element mesh generation" patented technology

The invention discloses a cultural relic three-dimensional dynamic scene display system based on a virtual-real fusion technology, and relates to the technical field of mixed reality, and the system comprises a data collection module which obtains original signals of a to-be-displayed cultural relic and a surrounding environment, and generates an environment feature vector and an environment fusion index; the twinborn simulation module is used for generating health state feature vectors of the cultural relics in combination with finite element grids and carrying out prediction simulation on the deterioration state of cultural relic materials; the model creating module is used for creating a three-tense model resource package and generating time axis metadata by adopting a vertex interpolation and mapping mixing technology; the story layout module is used for constructing an environment event mapping rule base, obtaining a ranked trigger event list through priority ranking, and generating a scene script sequence; according to the method, the health state and the degradation process of the cultural relics under different environmental conditions can be dynamically reflected, and three-dimensional scene display changing along with time evolution is provided.

The invention discloses an element size effect elimination method for concrete structure damage finite element simulation, which comprises the following steps of: 1, performing finite element mesh generation on a concrete structure, endowing all elements with a concrete damage zone model based on a power law type tensile damage equation and initial model parameters, and establishing a concrete structure damage finite element model; step 2, obtaining size information of each unit in the concrete structure damage finite element model in the step 1, and adaptively calculating model parameters of each unit related to the size of the unit based on the size information of the unit; and step 3, simulating a concrete structure loading process by using the model parameters calculated in the step 2 to obtain a concrete structure damage finite element simulation result in which the unit size effect is eliminated. The method breaks through the bottleneck that the unit size effect in concrete structure damage finite element simulation cannot be eliminated in the prior art, and has wide application prospects in the process of objectively simulating concrete structure damage evolution.

The invention relates to the technical field of bridge structural members, in particular to a steel-concrete composite bridge UHPC pavement structure finite element model construction method, which comprises the following steps of: acquiring structural parameters and UHPC pavement characteristics of a steel-concrete composite bridge, dividing regions, generating a finite element initial grid set, loading a bridge deck load, calculating stress and displacement response of a UHPC pavement layer in each time step, and constructing a finite element model of the UHPC pavement structure. According to the method, by dividing the structural area and introducing the microfracture factor, finite element grid generation is improved, mechanical behaviors are accurate, stress and displacement response can be obtained by combining dynamic analysis and real-time monitoring, and the method is suitable for the dynamic analysis and real-time monitoring. Potential damage is warned in advance, the stability and durability of the bridge are improved by recognizing a nonlinear response area and optimizing interface mechanical analysis, the design precision and long-term performance prediction of the structure are integrally improved, and the reliability of the bridge under the complex working condition is guaranteed.

The invention relates to the technical field of pipeline layout, and discloses a complex pipeline system layout optimization method based on a multi-material interpolation model. The problems that in the prior art, multi-pipeline independent communication cannot be met, and the multi-inlet-outlet matching relation is difficult to specify can be solved to a certain extent. The method comprises the following steps: acquiring geometric information and pipeline information of a design domain, carrying out finite element mesh generation on the design domain, setting a pseudo-density variable field, filtering the pseudo-density variable field through a Helmholtz equation, carrying out projection through a black viezeldet equation, and establishing an interpolation model; the method comprises the following steps: setting laminar flow physics fields, giving inlet and outlet boundary conditions, respectively solving fluid control equations of the laminar flow physics fields, calculating to obtain fluid flow dissipated energy, fluid volume fraction and outlet flow variance in each pipeline, establishing a complex pipeline network system layout optimization problem model, and selecting a mathematical programming algorithm to carry out optimization design. And the optimized pipeline system layout is obtained.

This invention relates to the field of energy storage equipment structural simulation and mechanical reliability assessment technology, specifically a strain node assessment system for energy storage cabinets based on mechanical simulation. The system includes: a basic data parsing module, which acquires three-dimensional structural data and material property data of the energy storage cabinet, extracts assembly and bonding features, and performs finite element mesh generation to form an initial strain node set; a dynamic interference injection module, which acquires historical operating environment load characteristic data and generates a dynamic interference load spectrum through a generative adversarial network model; a trust entropy assessment module, which extracts ideal stress tensor sequences and nonlinear stress tensor sequences and calculates the dynamic divergence rate, defining it as the node-level simulation trust entropy; and a topology reconstruction module, which optimizes and reconstructs target nodes exceeding a threshold and iteratively updates them, outputting a structural optimization assessment report or an initial safety assessment report. This invention enables early screening of high-risk assembly nodes in energy storage cabinets and provides decision support for structural reconstruction.

This invention discloses a topology optimization method for the stiffening layout of an integrated die-cast and extruded electric vehicle underbody structure, relating to the field of electric vehicles. The method involves finite element mesh generation for the electric vehicle underbody structure, classifying the mesh into extrusion meshes and casting meshes based on the processing technology used for the components. The finite element mesh within a single component is further subdivided into design domains and non-design domains. For the casting design domain, a mathematical model of casting constraints is established to optimize the stiffening of thin-walled die-cast parts. For the extrusion design domain, an extrusion process constraint is applied to establish a mathematical model to optimize the internal stiffening of the cross-section. The mathematical model is solved to obtain the density distribution of each element, determining the stiffening layout form that satisfies both comprehensive service conditions and dual manufacturing process constraints. Based on the calculated element density distribution and load transfer path, the topology optimization results are reconstructed into a CAD model or mesh model with stiffeners.

The invention belongs to the field of structure optimization design, and particularly discloses a topological optimization method and system for accurately and efficiently regulating and controlling the deformation characteristic of a structure, and the method comprises the steps: carrying out the finite element mesh generation of a to-be-optimized structure with the spring deformation characteristic, and defining a design variable corresponding to a mesh; determining the total strain energy constraint of the structure according to the stiffness coefficient and the maximum deformation of the spring, and establishing a first topological optimization model by taking the minimization of the total volume of the structure as a target; performing topological optimization based on the first topological optimization model to obtain a structural configuration and a total volume thereof; setting an upper limit of a structure total volume constraint according to the total volume, constructing the structure total volume constraint, and meanwhile, continuously using the structure total strain energy constraint of the first topological optimization model to establish a second topological optimization model by taking a p norm of minimizing an external force local deformation error as a target; and carrying out topological optimization based on the second topological optimization model to obtain a final structure configuration. The system is high in universality, diversified in function, accurate and efficient.

This application relates to the field of finite element analysis technology, and in particular to a method and related apparatus for generating finite element meshes based on myocardial tissue pathological slices. The method includes: extracting spatial features from myocardial tissue pathological slice images to obtain intermediate layer features; inputting each image patch into a Transformer module to obtain hidden features; concatenating the hidden features with the intermediate layer features to obtain semantic segmentation results; determining a tissue category prediction mask; determining the tissue category; extracting the contour edge pixel regions of each tissue and generating a multi-category comprehensive mask image; and performing label recognition on the multi-category comprehensive mask image to generate finite element meshes with different material properties. This application enables effective and accurate analysis of key functional microstructures, eliminating the cumbersome process of manually converting histological slices into finite element geometry and meshes, which is highly dependent on traditional methods, thus laying a solid foundation for computational modeling simulation and microstructure analysis.

This invention belongs to the field of structural optimization design, and specifically discloses a topology optimization method and system for accurately and efficiently controlling structural deformation characteristics. The method includes: performing finite element mesh generation on the structure to be optimized, which exhibits spring deformation characteristics, and defining design variables corresponding to the mesh; determining the total strain energy constraint of the structure based on the spring constant and maximum deformation, and establishing a first topology optimization model with the goal of minimizing the total structural volume; performing topology optimization based on the first topology optimization model to obtain the structural configuration and its total volume; setting an upper limit for the total structural volume constraint based on this total volume to construct the total structural volume constraint, while simultaneously using the total strain energy constraint of the first topology optimization model, and establishing a second topology optimization model with the goal of minimizing the p-norm of the local deformation error under external force; and performing topology optimization based on the second topology optimization model to obtain the final structural configuration. This invention is highly versatile, functionally diverse, and precise and efficient.

The invention discloses a variable-pitch tire pattern finite element mesh generation method, which performs secondary development on Hypermesh based on a TCL language, and comprises the following steps: firstly, creating a set and inputting variables such as tire radius, pitch width, pitch name and pitch arrangement, and then calculating the angle of each pitch in the circumferential direction; and rotating copying of the grid is completed by traversing the pitch arrangement matrix, and automatic generation of the pattern full-arrangement grid is achieved. Afterwards, setting tolerance merging grid gaps, exporting a file which does not contain pattern groove grids, storing pattern longitudinal groove nodes in a specific mode, and generating pattern groove units; according to the method, the variable-pitch tread pattern grid division efficiency is effectively improved, pattern groove grid distortion is avoided, the simulation calculation convergence efficiency can be improved, and efficient grid modeling support is provided for tire performance analysis and product research and development.

The invention provides a material dynamic mechanical behavior simulation method and system based on LS-DYNA, and relates to the technical field of material simulation analysis methods. The method comprises the following steps: compiling a viscous-hyperelastic constitutive mathematical model into a UMAT subprogram, and embedding the UMAT subprogram into a solver of LS-DYNA software; the method comprises the following steps: carrying out finite element mesh generation on a geometric simulation model of a high polymer material sample, and generating a k file according to the characteristics of a high polymer material, keywords of a defined UMAT subprogram and parameter assignment of a viscous-hyperelastic constitutive mathematical model; and calling a solver of the LS-DYNA software according to the keyword of the UMAT subprogram, and calculating a k file to obtain a simulation result. According to the method, the dynamic mechanical response of the high polymer material can be predicted with high precision, the simulation precision of LS-DYNA software is improved, and the method is widely applicable to dynamic response simulation of materials such as rubber, a polyurea coating and a polyether polyurethane solid propellant in an impact environment.

This invention relates to the field of engineering numerical simulation technology, and in particular to a numerical simulation method and system for the construction process of non-standard storage tanks. The invention creates an analysis layer based on the construction stage, determines the construction process density guiding field and geometric density guiding field based on the analysis layer, and generates an adaptive mesh density field, followed by finite element mesh generation. When performing finite element mesh generation on multiple models, engineers only need to define the construction stage and analysis objective, and the mesh generation process can be completed automatically, significantly shortening the preprocessing cycle and reducing the risk of human error. It is particularly suitable for handling complex and variable construction simulations of non-standard storage tanks.

This invention discloses a method for simulating active diaphragmatic contraction respiratory motion based on a finite element model, comprising the following steps: acquiring human CT scan data; establishing a geometric solid model of the diaphragm based on the CT scan data, the geometric solid model of the diaphragm including the central tendon, muscle belly, and muscle fibers; performing finite element mesh generation on the geometric solid model of the diaphragm, generating diaphragmatic contraction units according to the spatial distribution of muscle fibers to simulate the active contraction of the diaphragm; employing an isotropic hyperelastic constitutive model to describe the passive dynamic characteristics of the diaphragm, and describing the active contraction force of the diaphragmatic contraction units based on the improved Hill active contraction equation; adding physiological boundary conditions to the geometric solid model of the diaphragm, iteratively solving the geometric solid model of the diaphragm to simulate the periodic contraction and inhalation process of the diaphragm, and displaying the diaphragmatic contraction process through visualization software. This invention can express diaphragmatic contraction with precision, reflect diaphragmatic displacement, and improve the accuracy of the passive response of the diaphragm.

The invention provides a plate shell type structure reinforcement arrangement optimization method and device, and the method comprises the steps: arranging a reinforcement structure on a plate shell type structure to construct a plate shell type structure finite element model with the reinforcement structure, and carrying out the finite element mesh generation of the finite element model; according to the actual stress condition of the plate shell type structure, constraint and load are applied to the finite element model, static force calculation is carried out, displacement response is obtained, and a deformation index is determined; setting a section parameter of each beam unit as a product of an initial value and a discrete variable; the discrete variables of all the beam units serve as optimization variables, on the premise that the rigidity meets the deformation index, optimization calculation is carried out with the minimum overall weight of the structure as an optimization objective function, and the discrete variables of all the beam units are obtained; the discrete variables are judged, if the discrete variables meet the requirement, the corresponding reinforced structures are reserved, and if the discrete variables do not meet the requirement, the corresponding reinforced structures are deleted, so that the optimal arrangement scheme of reinforcement of the plate and shell type structure is obtained.

This invention discloses a method for optimizing charge parameters in the blasting of large boulders, relating to the fields of blasting engineering and data optimization processing. The method includes: constructing a three-dimensional model of the boulder by fusing three-dimensional laser scanning and ground-penetrating radar data and performing finite element mesh generation; determining the dynamic mechanical parameters of the rock using Hopkinson bar experiments and calibrating the RHT constitutive model; calculating the basic charge amount based on the principle of energy conservation and optimizing it by combining morphological sensitivity coefficients and local defect correction coefficients; conducting numerical simulation of the entire blasting process using borehole parameters and single-hole charge amount as decision variables; constructing a multi-objective function including predicted fragmentation size, specific charge amount, and safety risk index, and iteratively solving it using a multi-objective optimization algorithm. This invention uses an experimentally calibrated constitutive model as its physical basis, predicts blasting effects through numerical simulation, and uses optimization algorithms to automatically optimize charge parameters, effectively balancing fragmentation effects and safety.

The invention discloses an optimization design method for a vibration and noise reduction structure of an electrically-driven cover plate. The optimization design method comprises the steps that a cover plate foundation frame structure model is established according to product enveloping and avoiding requirements; performing finite element mesh generation and material attribute endowing on the cover plate foundation framework structure model to obtain a cover plate foundation framework finite element model; establishing virtual connecting parts at the mounting holes of the cover plate basic framework finite element model, coupling the virtual connecting parts with the corresponding mounting holes through rigid connection, and applying full-degree-of-freedom constraint to the far ends of all the virtual connecting parts; and performing modal analysis on the constrained cover plate foundation framework finite element model to obtain a first-order modal frequency as a reference frequency. According to the method, on the basis of a simplified virtual connection part and a frame model, the actual complex excitation of the electric drive system is simplified to be bolt hole normal unit simple harmonic force excitation, and the purpose of optimizing is achieved by controlling parameters such as modality, equivalent sound radiation power and volume percentage.

The invention discloses a satellite-borne film antenna on-orbit charge accumulation analysis method, and relates to the technical field of spacecraft on-orbit charge accumulation theoretical analysis and simulation. The method comprises the following steps: establishing a satellite-borne film antenna in-orbit charge accumulation analysis geometric model based on three-dimensional geometric modeling software Gmesh; importing the geometric model file into spacecraft plasma interaction software SPIS to perform finite element grid division; establishing a satellite-borne film antenna on-orbit charge accumulation model based on a current balance principle and a PIC particle compartment algorithm; giving global solving parameters, and solving a satellite-borne film antenna charge accumulation model; and based on a nonlinear finite element method, obtaining deformation information of the satellite-borne film antenna under on-orbit charge accumulation. According to the satellite-borne film antenna on-orbit charge accumulation analysis method, the potential information and the deformation information of the satellite-borne film antenna under the action of on-orbit charge accumulation can be calculated and analyzed, and a theoretical basis is provided for accurate prediction of an on-orbit electrostatic discharge threshold value of the satellite-borne film antenna.

The application provides a kind of multi-facial domain stratum finite element grid generation method based on BRep model, and relates to the technical field of three-dimensional geological modeling.The main research contents include: processing the drilling data of modeling area, generating open pit mining stope surface based on Delaunay triangulation, and interpolating stratum interface and fault interface etc.combined with distance power inverse ratio method;establishing model range grid according to the required range of modeling;processing between stratum interface and fault interface, and establishing BRep model between stratum interface and fault interface;then, establishing BRep model between model range grid and stratum interface and fault interface, which is the BRep model of multi-facial domain stratum;carrying out irregular tetrahedron partitioning on multi-facial domain stratum space, to realize the generation of finite element grid of multi-facial domain stratum space based on BRep model.The results show that this method can accurately generate finite element grid of multi-facial domain stratum space, and effectively improve work efficiency.

The invention discloses a multi-program coupling simulation method and system based on a netting model. The method comprises the following steps: acquiring an original netting model and a finite element grid, and generating a node table and a unit table according to the original netting model and the finite element grid by adopting a netting grouping method; constructing a plurality of target mesh units according to the node table and the unit table; calculating the hydrodynamic load of each target mesh unit; and performing multi-program coupling simulation on the hydrodynamic load of each target mesh unit based on an external multi-physical field simulation program, and outputting a coupling simulation result.

The invention relates to the technical field of engineering numerical simulation, in particular to a numerical simulation method and system for the construction process of a non-standard storage tank. According to the method, an analysis layer is created according to a construction stage, a construction process density guide field and a geometric density guide field are determined according to the analysis layer, a self-adaptive grid density field is generated, and then finite element grid division is performed; when finite element mesh generation is carried out on multiple models, an engineer only needs to define a construction stage and an analysis target, the mesh generation process can be automatically completed, the pretreatment period is greatly shortened, the human error risk is reduced, and the method is particularly suitable for processing complex and changeable non-standard storage tank construction simulation.

A multi-scale component model finite element grid generation method and device and storage medium, the method comprises the steps of: obtaining a multi-scale component model data file; a cyclic traversal list is established for the multi-scale component model data file; the cyclic traversal list is cyclically traversed; the cyclic traversal data is obtained; the feature grid parameters are set according to the cyclic traversal data; the multi-scale component model is divided into grids according to the feature grid parameters. The application can quickly generate different orders of magnitude geometric region grids for complex multi-scale component models, and connect the grids between different scales uniformly according to the geometric index control function. Compared with the traditional adaptive grid drawing method, the overall model grid quantity can be reduced, the design cycle can be greatly shortened, and the product design efficiency can be improved. The application can be applied to a complex model with different scales, and the grids between different scales are uniformly transitioned, so that the grids between scales do not change abruptly, and the grid quality is good.

The invention provides a floor support plate typesetting method under a supporting beam non-coplanar condition, which comprises the following steps of: firstly, establishing a floor elevation control net through an NURBS curve, covering the floor elevation control net with an NURBS curved surface to form a smooth and continuous surface model of a floor, and then, carrying out high-quality plane unit division on the floor by utilizing a finite element grid division technology, so as to form a smooth and continuous surface model of the floor. And finally, extracting a unit number, a node number and a node coordinate of each unit plate according to the grid division scheme to serve as a typesetting and splicing scheme of the floor support plate. According to the method, floor support plate abutted seams and elevation differences caused by manual typesetting are reduced, material waste is reduced, the quality problems such as slurry leakage in the concrete pouring process of the floor support plate are avoided, and it is guaranteed that a curved-surface-shaped floor formed through pouring is continuous and attractive.

The invention relates to a finite element mesh generation method and device for a target shell. The method comprises the steps that the shape and contour form and various shape and contour features of the target shell are obtained; determining skeleton reference lines corresponding to the two opposite main surfaces of the target shell, and adaptively generating an internal shell skeleton of the target shell according to the two skeleton reference lines; respectively matching the internal shell skeleton and a finite element feature model corresponding to each shape contour feature from a preset database; performing finite element segmentation by adopting the corresponding finite element feature model to obtain a shell skeleton discrete model corresponding to the internal shell skeleton and an outline discrete model corresponding to each outline feature; and combining the shell skeleton discrete model and each profile discrete model, and outputting the combined discrete model as a standard finite element grid. According to the method, the accuracy of shell finite element mesh generation is improved.

This application relates to the field of computer-aided engineering technology, and in particular to a method, apparatus, and device for automatic finite element mesh generation of a circular boss structure. The method includes: determining the circular boss structure to be meshed and the mesh reference dimensions; identifying the boss plane, chamfer surface, inner chamfer feature lines, and outer chamfer feature lines based on the circular boss structure, calculating the minimum distance between the inner and outer chamfer feature lines, performing circumferential cutting on the chamfer surface according to the minimum distance and the mesh reference dimensions, and performing overall cutting on the circular boss structure to be meshed based on the normal vector of the boss plane to obtain a cleaned circular boss structure; and meshing the cleaned circular boss structure to obtain the finite element mesh of the circular boss structure. This solves the problems of excessively large mesh element side length ratios, chaotic mesh flow, and low mesh generation efficiency in related technologies, thus improving mesh quality.

The invention relates to the technical field of pipeline layout, and discloses an embedded runner functional structure topological optimization method considering pipeline wall generation. The method comprises the following steps: determining a design domain, a non-design domain and a physical domain according to an optimization problem, performing finite element grid division on the physical domain, defining two initial pseudo-density variable fields, performing filtering and projection operation on a first initial pseudo-density variable field for controlling fluid medium distribution, and obtaining a second pseudo-density variable field for controlling fluid medium distribution; filtering and projecting a second initial pseudo-density variable field for controlling the material distribution of the structure, establishing an interpolation model of elastic modulus, permeability coefficient and material unit volume fraction, and respectively solving control equations of fluid flow and structure bearing; and calculating response functions of structural strain energy, flow energy loss, fluid medium volume and structural body fraction, establishing a topological optimization model, and selecting a mathematical programming method to update design variables until optimization meets convergence conditions.

The application relates to a target shell finite element mesh generation method and device, the method comprising: acquiring an outline contour shape and multiple outline contour characteristics of a target shell; determining two corresponding skeleton reference lines of two opposite main surfaces of the target shell, and adaptively generating an internal shell skeleton of the target shell according to the two skeleton reference lines; respectively matching the internal shell skeleton and a corresponding finite element characteristic model of each outline contour characteristic from a preset database; performing finite element segmentation by using the corresponding finite element characteristic model, so as to obtain a shell skeleton discrete model corresponding to the internal shell skeleton and an outline contour discrete model corresponding to each outline contour characteristic; combining the shell skeleton discrete model and each outline contour discrete model; and outputting the combined discrete model as a standard finite element mesh. The application improves the accuracy of shell finite element mesh generation.

The invention discloses a numerical simulation method for AlMg5 bicycle frame welding, which is specifically implemented according to the following steps: step 1, designing a three-dimensional solid model of an AlMg5 bicycle frame, and performing finite element mesh division on the model; 2, designing a clamp, and assembling the clamp and the AlMg5 bicycle frame model after grid division; step 3, establishing a welding track and a welding seam model, and setting a welding heat source; and 4, post-processing solving parameters are set, and post-processing data are read. The frame welding process and the frame structure are optimized by simulating the magnitude of the residual stress after welding. According to stress distribution after simulation, current and voltage in the local structure and the welding process can be reset, meanwhile, welding cracks are usually generated at the maximum strain generation position, and cracks can be prevented from being generated by controlling the maximum strain.

The application provides a tread pattern modeling and finite element grid generation method based on ABAQUS, which simplifies the modeling process of the tread pattern, avoids complex curved surface modeling operations, quickly establishes a three-dimensional model of a complex pattern, and can generate a finite element grid by using a general finite element pre-processing software through the simplified three-dimensional model. The pattern modeling and grid generation method greatly improves the pattern modeling efficiency and the quality of the three-dimensional finite element grid in the numerical simulation process of the mechanical properties of the tire, lays a foundation for the accurate simulation of the performance of the tire, and is easy to be embedded into existing finite element simulation software through secondary development programming.

The invention relates to a geological model generation method and device based on IFC, electronic equipment and a medium. The method comprises the steps that geological exploration information of a target area is acquired and converted into digital information; based on a preset modeling engine, an initial BIM model is constructed according to the digital information, and key geological exploration information is extracted from the model; based on the three-dimensional MRF theory, geological attribute area information of the target area is deduced according to the key geological exploration information, and a voxelization three-dimensional geological model is generated; geological interface information of the voxelization three-dimensional geological model is extracted, and based on finite element grid generation software, a surface grid model of each geological layer is constructed according to the geological interface information; and on the basis of a preset modeling engine, constructing a global three-dimensional geological BIM model according to the surface mesh model of each geological layer. Therefore, the problems of modeling difficulty, long model updating period and poor information sharing caused by heterogeneity of geological data in related technologies are solved, and the efficiency and precision of three-dimensional geological model construction are improved.

The invention relates to the field of advanced manufacturing, and discloses a thermal stress simulation method and system based on a casting mold, and the method comprises the steps: constructing a three-dimensional geometric model of the mold, carrying out the finite element mesh division of the model, and carrying out the quality evaluation of the divided mesh, thereby achieving the simulation of the thermal stress. Thermal physical performance parameters, mechanical performance parameters and mold boundaries are set for the constructed mold three-dimensional geometric model, whether changes of a temperature field, a stress field and a contact state meet convergence criteria or not is judged on the basis of analysis and calculation of the content of the mold three-dimensional geometric model, and the casting performance and the casting quality of the model are analyzed, so that the casting quality is improved. According to the method, the simulation evaluation coefficient is calculated and used for evaluating the casting performance and the casting quality of the model, and then the simulation evaluation coefficient and experimental data are compared and analyzed, so that the parameters of the model are adjusted, the simulation model can be continuously optimized, the simulation precision and reliability of the model are greatly improved, and the actual production requirements are better met.