9 results about "Finite element mesh generation" patented technology

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.

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 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.

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.

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 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.

This invention relates to the field of building energy consumption simulation technology, specifically a method for simulating building energy consumption using BIM technology. The method includes: acquiring a building information model of the target building; extracting building geometric topology, component attributes, and spatial relationship data to construct a structured building dataset; collecting annual meteorological parameters, building operating time, and indoor environmental setting parameters, integrating them to form an environmental and operational dataset; employing an improved finite element mesh generation algorithm to adaptively divide the computational mesh based on component thermal properties and spatial adjacency relationships; constructing dynamic control equations for building thermal processes and assembling an energy consumption simulation model; calling a numerical solver to complete model calculations; outputting hourly energy consumption and indoor thermal environment parameters for the entire year; identifying high-energy-consumption periods and spatial areas through data analysis; and generating an energy-saving optimization report. This solution can improve the accuracy and data refinement of building energy consumption simulation, achieving precise simulation and analysis of the building's annual thermal conditions and energy consumption status.

The present disclosure provides a PCB board finite element grid generation method and device, electronic equipment and storage medium, through automatic identification and cutting of key features such as solder pad, opening, transition area, adaptive determination and merging of grid transition area in pin cluster area, implementation of partition grid according to preset full parameterization strategy, and realization of consistent solder layer and board surface node, which can significantly reduce the workload of manual cutting and manual grid adjustment, reduce the risk of grid fragmentation in dense pin area and cell distortion around hole, improve grid quality and size transition continuity; At the same time, the efficiency, stability and consistency of finite element model construction can be improved, so as to improve the calculation convergence and result reliability of subsequent structure, heat and vibration simulation.