8 results about "Finite element stress analysis" patented technology

The invention belongs to the technical field of bridge maintenance, and discloses a machine vision and digital twinning combined remote repair welding repair method and system for a cracked steel bridge structure. A transmission steel bridge maintenance method mainly depends on manual detection and field repair, and has many limitations in practical application and is difficult to meet bridge maintenance requirements. The method comprises the following steps: acquiring steel bridge data through a detection robot to identify a steel bridge crack, generating a three-dimensional model of the steel bridge crack based on the steel bridge crack data, performing finite element stress analysis, generating a crack welding strategy, and issuing the crack welding strategy to a welding robot to execute a welding action; further dynamically mapping the welding information to the three-dimensional model of the crack, fusing the three-dimensional dynamic model of crack repair into a VR operation interface, and monitoring the welding process of the welding robot through the VR operation interface; and finally, the welding robot detects the repair integrity of the steel bridge crack, and the repair integrity information is updated to the three-dimensional dynamic model of steel bridge crack repair.

The invention relates to the technical field of data processing, and discloses an ocean net cage structure determination method based on simulation optimization. The method comprises the steps that ocean current, wave and water depth data are collected through an ocean environment sensor, and a standardized parameter set is obtained through preprocessing; constructing a net cage load calculation model, and carrying out finite element stress analysis; calculating a stability index based on stress distribution, and establishing a constraint condition; establishing a multi-objective optimization function, and considering cost and strength parameters; performing global optimization by adopting a genetic algorithm to generate a candidate scheme library; and optimal parameters meeting the bearing capacity and economical efficiency requirements are screened, and a final net cage structure configuration scheme is determined. According to the method, global multi-objective optimization of the net cage structure parameters under the complex marine environment condition is realized, so that the optimal net cage structure configuration scheme meeting the requirements of structure safety, economy and engineering practicability at the same time is obtained.

The invention discloses a strike-slip fault zone activity ability evaluation method based on a finite element method, and the method comprises the steps: determining the three-dimensional space distribution characteristics of a strike-slip fault zone, determining the evaluation range of the activity ability of the strike-slip fault zone, determining the ground stress state of a research region, carrying out the finite element stress analysis, and carrying out the simulation data of the ground stress distribution, thereby achieving the evaluation of the activity ability of the strike-slip fault zone. The method comprises the following steps: calculating the acting force of different parts of a strike-slip fault zone, calculating two parameters for evaluating the activity capability of the strike-slip fault zone, optimizing the data distribution range of the two parameters according to the strike-slip fault zone activity capability evaluation threshold values of the two parameters, and screening the data capable of being used for evaluating the activity capability of the strike-slip fault zone by utilizing a cumulative multiplication method, so as to evaluate the activity capability of the strike-slip fault zone. The invention relates to a method for finely evaluating active parts of strike-slip fault zones and activity of different parts. According to the method, the activity capability difference of different parts of the strike-slip fault zone can be quantitatively judged, and an effective scheme is provided for professional technicians for researching activity capability evaluation of the strike-slip fault zone and well location deployment.

This application provides a structural optimization method and system for slicing materials specifically designed for 3D-printed eyeglass frames. The method includes: performing finite element stress analysis and extracting continuous stress field data and principal stress directions; calculating dimensionless stress parameters using the continuous stress field data to divide the model's interior into different stress zones and match them with different unit cell types; adjusting the rotation angle and aspect ratio of the unit cells in real time based on the principal stress directions and stress ratios to generate a stress-adaptive internal lattice structure; performing differential geometry analysis on the surface of the 3D eyeglass frame model to construct a comprehensive curvature threshold function and generate a support structure; searching for optimal structural parameters through Pareto front analysis; and integrating the internal lattice structure, support structure, and structural parameters to generate slicing data and plan the printing path. This application optimizes the load-bearing efficiency of the eyeglass frame structure and improves the specific strength of the material.

The invention discloses a finite element stress analysis and prediction method and system, and relates to the technical field of finite element modeling of buildings, and the method comprises the following steps: generating a stress analysis calculation model and a stress prediction model of a structure through ABAQUS software, and exporting a corresponding odb file; outputting a stress analysis AVI video file of each time stage through a Python program; synchronously inputting the stress data and the environmental parameters into a stress prediction calculation model; outputting a prediction result picture in a tiff format, converting the prediction result picture into a prediction result picture in a jpg format through an ImageMagick tool, and storing the prediction result picture in a server; the stress analysis AVI video file and the prediction result picture in the jpg format on the server are inquired through the platform, and are visually presented on a display page; according to the invention, the health degree of the current building structure safety can be visually known, hidden danger problems can be conveniently checked, the manpower monitoring cost is reduced, and the efficiency of building maintenance work is improved.

The invention discloses a three-dimensional reconstruction method fusing multi-dimensional physical space information, and belongs to the technical field of three-dimensional reconstruction in computer vision. According to the method, through cooperative work of six modules including a multi-view data preprocessing module, a semantic mask denoising module, a multi-modal feature extraction and coding module, a physical space matching module, a finite element stress analysis module and a visual interaction module, the process from multi-view data preprocessing to multi-dimensional physical space information reconstruction and visualization in three-dimensional modeling is achieved. The method comprises the following steps: firstly, generating an initial point cloud by using a multi-angle image, and extracting semantic masks of a main body and an accessory component through semantic segmentation and mask denoising; then, features such as materials and pH values extracted by a visual language model (VLM) and stress information obtained through finite element analysis are fused, a 32-dimensional feature vector with multi-dimensional physical space information is constructed and embedded into a Gaussian point set, and finally a three-dimensional reconstruction model with the multi-dimensional physical space information is achieved. According to the method, unified coding and visual display of multi-dimensional physical space attributes are realized in the 3D-GS model for the first time, and the method has high efficiency, expandability and good visual interaction capability and is suitable for the fields of digital twinning, smart industry and the like.

The present application relates to the technical field of aero-engine probability damage tolerance evaluation, and particularly relates to a triangular quadrilateral two-dimensional hybrid grid stress partitioning method for aero-engine wheel disc, comprising the following steps: obtaining finite element stress analysis result data of the wheel disc component, preprocessing, and obtaining preprocessed input data; obtaining a convex hull boundary formed by all nodes by using the Graham method, and obtaining a graph boundary based on the convex hull boundary; obtaining stress pre-grouping and element type pre-grouping of each grid element; establishing an element adjacency graph based on the adjacent relationship of each grid element; searching the element adjacency graph by using a breadth-first search algorithm, and dividing grid elements with the same stress pre-grouping and the same element type pre-grouping into the same partition; and finally obtaining partition numbers of each grid element as the wheel disc stress partitioning result; the present application can improve the calculation accuracy and efficiency of the wheel disc stress partitioning.

The application provides a robot head appearance digital adaptive customization generation method and system, the system is based on robot head three-dimensional data, designs data pretreatment, feature recognition, parameterized modeling, multi-constraint optimization, structure reinforcement, interface generation, standardized whole-process automation link of production output, each function module of the modular system is uniformly scheduled by a processor unified scheduling module, the core of the method realizes micron-level accurate adaptation of the appearance model and the head surface through multi-constraint surface adaptive iterative optimization, the durability of the appearance part is improved through finite element stress analysis and targeted structure reinforcement, the fusion of individualization and scaling is realized through whole-process standardization and parameterized modeling, and the technical problems of insufficient accurate adaptation of the appearance of the robot head and the head surface, lack of automatic customization process and poor structure reliability of the appearance part are solved.