24 results about "Stress–strain analysis" patented technology

The invention discloses a fatigue load response analysis method for a non-uniform beam of a ship, and particularly relates to the technical field of fatigue load response analys.The vibration coupling degree between the non-uniform beam and other parts of the ship is judged by obtaining the inherent frequency of the non-uniform beam and the other parts of the ship and calculating the vibration coupling degree coefficient; the method comprises the following steps of: acquiring load time-history data of a non-uniform beam, generating a dynamic load spectrum of the non-uniform beam, effectively capturing real load conditions of a ship under various working conditions, and calculating a fatigue damage coefficient of the non-uniform beam through local stress-strain analysis of the non-uniform beam so as to obtain a dynamic load spectrum of the non-uniform beam. A self-adaptive fatigue damage model is constructed based on the vibration coupling degree coefficient and the fatigue damage coefficient, the fatigue damage value of the non-uniform beam is dynamically corrected, the fatigue damage evolution process of the non-uniform beam under different working conditions is reflected through self-adaptive adjustment, and the dynamic property and accuracy of fatigue damage evaluation are improved.

The invention belongs to the field of building structure analysis, and discloses a BIM-based building support structure stress analysis method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining design data of a support structure, and generating a three-dimensional initial model containing geometric features, physical attributes and boundary conditions through a BIM technology; extracting material characteristics and environmental action data from the three-dimensional initial model, and integrating physical attributes and boundary conditions through a finite element analysis method to obtain a stress calculation model; according to the stress calculation model, performing stress-strain analysis on the model by adopting a finite element analysis method, and updating the stress calculation model to obtain a unified model; and calculating stress distribution of the supporting structure of the unified model through a simulation analysis algorithm to obtain preliminary stress result data, extracting a deviation value from the stress result data, and if the deviation value is greater than a preset threshold value, recalculating by adjusting parameters of the unified model until the deviation value is less than the preset threshold value to obtain a final stress analysis result.

The invention discloses a recycled concrete compression plasticity stage discriminating device based on acoustic emission and stress-strain analysis, which comprises the following steps: applying axial pressure load to recycled concrete test pieces under different working conditions, and synchronously measuring acoustic emission signals and material compression stress-strain curves of the recycled concrete test pieces; and outputting a time and accumulated acoustic emission energy value, an acoustic emission b value, stress and strain Excel table. Constructing a GUI interface through MATLAB, and creating an execution button, an input box and a result and graph display area; callback functions for file selection and operation monitoring are respectively defined based on a GUI interface; extracting data of acoustic emission, b value, stress and strain from a specified Excel worksheet, and performing interpolation processing; calling a function to detect the yield strength and the time and strain of complete damage, and outputting a result. According to the method, the plasticity stage of the material can be rapidly detected by processing the acoustic emission data and the stress-strain data, so that data processing and result display are more intuitive.

The invention provides an intelligent prediction and early warning method and system for oral implantation risks, and the method comprises the steps: obtaining the mechanical response data of oral mucosa tissues under an occlusion load and the three-dimensional strain gradient tensor of a target contact surface, and combining a preset stress-strain analysis model, establishing a target dynamic attenuation curve of the elastic modulus of the oral mucosa tissue in the whole healing period; performing coupling analysis on the target dynamic attenuation curve of the three-dimensional strain gradient tensor and the elastic modulus to generate a multi-level relaxation correlation parameter, and analyzing the stress conduction path offset of the target contact surface by combining a lightweight network with the multi-level relaxation correlation parameter; and generating a hierarchical early warning instruction according to the space-time correlation between the stress conduction path offset and a preset healing stage biomechanical threshold. According to the application, the capability of predicting and early warning abnormal conditions possibly occurring at the contact surface of the implant and the oral mucosa tissue is improved.

The present invention discloses a calculation method for the equivalent flexural stiffness of a shield tunnel reinforced by synchronous grouting, including: 1) establishing a finite element calculation model of the shield tunnel considering the effect of synchronous grouting; 2) conducting stress-strain analysis at the segment joints of the shield tunnel and establishing a stress-strain equilibrium differential equation; 3) deriving the theoretical solution of the equivalent flexural stiffness of the shield tunnel under the action of synchronous grouting based on the principle of similar triangles and the definition of the equivalent flexural stiffness of the shield tunnel; 4) quantifying the synchronous grouting sensitive parameters and the equivalent flexural stiffness as a relationship matrix through calibration β , α , Z , and analyzing the influence of the thickness of the synchronous grouting layer, the elastic modulus of the grout, and the curing time on the equivalent flexural stiffness of the shield tunnel. The method of the present invention can quickly calculate the equivalent flexural stiffness of the shield tunnel reinforced by synchronous grouting while ensuring the accuracy of the calculation results, and can be widely applied to the reinforcement projects of shield tunnels, providing guidance for the design of shield tunnels reinforced by synchronous grouting.

The present application provides an intelligent prediction and early warning method and system for oral implant risks, wherein the mechanical response data of oral mucosal tissue under occlusal load and the three-dimensional strain gradient tensor of the target contact surface are obtained, and combined with a preset stress-strain analysis model, a target dynamic attenuation curve of the elastic modulus of the oral mucosal tissue during the entire healing cycle is established; the three-dimensional strain gradient tensor and the target dynamic attenuation curve of the elastic modulus are coupled and analyzed to generate multi-level relaxation correlation parameters, and the stress conduction path offset of the target contact surface is analyzed through a lightweight network combined with the multi-level relaxation correlation parameters; hierarchical early warning instructions are generated based on the spatiotemporal correlation between the stress conduction path offset and the preset healing stage biomechanical threshold. The present application improves the ability to predict and warn of abnormal conditions that may occur at the contact surface between the implant and the oral mucosal tissue.

The invention relates to the field of vortex plate stress analysis, in particular to a method for accurately analyzing stress and strain of a vortex plate. The method comprises the following steps: 1, establishing a vortex plate three-dimensional model; 2, performing transient solution on the fluid domain; 3, analyzing a static structure; 4, calculating steady-state heat; and 5, calculating an inertial load, and completing comprehensive stress-strain analysis of one-way coupling. According to the method, a CFD method (computational fluid mechanics) is combined with commercial software, a VLES turbulence model is innovatively introduced, the proportion of turbulence modeling and turbulence analysis can be adaptively adjusted through a resolution control function, the influence of grids on a calculation result can be weakened on the premise of ensuring calculation precision, and calculation resources are greatly saved. According to the method, the flow field distribution of the vortex compression cavity is calculated according to the temperature and the pressure of the vortex tooth surface, so that the load data at the fluid-solid coupling interface is obtained, and compared with a traditional simplified method, the temperature and the pressure of the vortex tooth surface calculated by the CFD method are more consistent with actual conditions, so that the structural strength analysis result is more reliable.

This invention discloses a device for determining the compressive plasticity stage of recycled concrete based on acoustic emission and stress-strain analysis. The device includes: applying axial compressive loads to recycled concrete specimens under different working conditions, simultaneously measuring their acoustic emission signals and compressive stress-strain curves, and outputting an Excel spreadsheet containing the time, cumulative acoustic emission energy value, acoustic emission b-value, stress, and strain. A GUI interface is constructed using MATLAB, creating execution buttons, input boxes, result display areas, and graphical display areas. Callback functions for file selection and monitoring are defined based on the GUI interface. Acoustic emission, b-value, stress, and strain data are extracted from the specified Excel worksheet and interpolated. Functions are called to detect yield strength and the time and strain of complete failure, and the results are output. This invention can quickly detect the plasticity stage of materials by processing acoustic emission and stress-strain data, making data processing and result display more intuitive.

The invention discloses a method for optimizing the random vibration fatigue life of a laminated welding spot, which comprises the following steps of: establishing a finite element simulation analysis model of the laminated welding spot based on ANSYA software, performing random vibration mode analysis and stress-strain analysis on the model, predicting the fatigue life of the laminated welding spot, determining factors and level values which influence the life of the laminated welding spot, and optimizing the fatigue life of the laminated welding spot. 9 groups of different parameter level combinations are designed by using an orthogonal test method, the vibration fatigue life of the 9 groups of laminated welding spots is predicted, range analysis is carried out, the optimal level combination with the maximum life is obtained, simulation verification is carried out, and the optimization method is simple and obvious in effect, and has certain reference significance for fatigue life optimization of other types of welding spots.

The invention provides a device and a method for analyzing stress and strain of a material at an ultrahigh strain rate, and relates to the technical field of material analysis at the ultrahigh strain rate. The material stress-strain analysis equipment under the ultrahigh strain rate comprises a transmitting tube, an impact block, a fixed bracket, a bearing base and a to-be-tested sample, an impact channel is formed in the fixing support, the bearing base is fixedly arranged at the impact channel of the fixing support, and a speed detector used for monitoring the flight speed of the impact block is arranged on the side, away from the bearing base, of the fixing support. The impact block is arranged in the launching tube, the impact block can penetrate through the impact channel to impact one side of the bearing base, and a plurality of samples to be tested are arranged on the other side of the bearing base; and a DISAR probe is arranged on the to-be-tested sample. The technical effect that more material dynamic parameters can be obtained through a single test is achieved.

The invention discloses a marine sample plate laser cutting numerical simulation method, which comprises the following steps of: establishing a finite element model based on structure size parameters of a sample plate and the position of a laser cutting area, and performing grid division; thermal physical performance parameters and thermal boundary conditions including specific heat, heat conduction coefficients and the like are set, the environment temperature is defined, and boundary flux is accurately expressed through a formula; a laser cutting heat source model is constructed, and a DFLUX subprogram is modified to adjust technological parameters such as laser power and cutting speed; the established model is used for heat transfer analysis, and a transient temperature field in the laser cutting process is obtained; mechanical property parameters and boundary conditions are set, and preparation is made for stress analysis; carrying out secondary development on the VUSDFLD subprogram, and deleting or retaining the unit according to a comparison result of the transient temperature and the ignition point value; and carrying out stress-strain analysis by taking the transient temperature as a load, and evaluating the shape and the stress distribution condition of the cut seam. According to the invention, high-precision simulation and effect evaluation of the laser cutting process are ensured.

The application provides a surface flaw analysis method combined with metal material fatigue life prediction, comprising: performing mesh optimization and refinement processing on an initial three-dimensional model, performing fine reconstruction on a local area, and obtaining a three-dimensional geometric model of a metal material surface, the three-dimensional geometric model containing surface flaw information of a microscale; performing regional division on the three-dimensional geometric model, identifying and extracting a surface flaw region, performing edge detection on the surface flaw region, and determining accurate geometric contours and spatial position information of the flaw; using finite element analysis software, importing the three-dimensional geometric model of the metal material and a flaw mathematical description model, setting material properties, boundary conditions and load working conditions, and establishing a finite element analysis model containing micro flaws; performing stress and strain analysis on the finite element analysis model of the micro flaw, calculating stress distribution and stress concentration coefficients around the flaw, and using fracture mechanics theory to evaluate the influence of the flaw on fatigue crack initiation and propagation.

The invention discloses a structural stress-strain analysis method and device based on artificial intelligence. The method comprises the following steps: receiving input stress sensing information, a structural drawing and a monitoring image, and extracting to obtain corresponding basic feature information; extracting corresponding comparison feature information from the three-dimensional structure model; judging whether the basic feature information is matched with the comparison feature information or not according to a preset matching judgment rule; if the basic feature information and the comparison feature information are not matched, inputting the basic feature information and the comparison feature information into a preset artificial intelligence model for correlation analysis to obtain a corresponding correlation analysis result; and obtaining a strain measure corresponding to the correlation analysis result from a preset stress-strain database. According to the method, in the structural construction process, the structural deformation in the construction process can be analyzed through artificial intelligence in combination with the actual working condition, so that the strain measures are obtained, the construction structure is adjusted, and structural stress-strain analysis can be efficiently carried out when the building structure deforms.

The invention discloses an equivalent flexural rigidity calculation method for reinforcing a shield tunnel through synchronous grouting. The equivalent flexural rigidity calculation method comprises the steps that (1) a shield tunnel finite element calculation model considering the synchronous grouting effect is established; (2) stress-strain analysis is conducted on a shield tunnel segment joint, and a stress-strain balance differential equation is established; 3) based on a triangle similarity principle and shield tunnel equivalent flexural rigidity definition, deducing to obtain a shield tunnel equivalent flexural rigidity theoretical solution under the synchronous grouting effect; and 4) quantifying the synchronous grouting sensitive parameters and the equivalent flexural rigidity into a relation matrix [# imgabs0 #, beta, alpha, Z] through calibration, and analyzing the influence of the synchronous grouting layer thickness, the grout elasticity modulus and the maintenance time on the equivalent flexural rigidity of the shield tunnel. According to the method, the equivalent flexural rigidity of the synchronous grouting reinforcement shield tunnel is rapidly calculated, meanwhile, the precision of a calculation result is ensured, the method can be widely applied to reinforcement engineering of the shield tunnel, and guidance is provided for design of the synchronous grouting reinforcement shield tunnel.

A method for analyzing pipeline stress sensitivity under landslide action comprises the following steps: establishing a pipeline constitutive model by applying a Ramberg-Osgood model; assigning the pipeline constitutive model and pipeline performance parameters to a pipe unit of finite element software for mechanical stress and strain analysis to establish the pipeline model; determining soil physical and mechanical indicators according to soil type; defining three soil springs to simulate pipe-soil interaction in three directions of a buried pipeline, and calculating pipe-soil interaction parameters of the buried pipeline in combination with the soil physical and mechanical indicators, the outer diameter of the buried pipeline, and the burial depth; assigning the pipe-soil interaction parameters to a soil spring unit in the finite element software to establish a soil spring model; establishing a finite element model for stress analysis of the buried pipeline under landslide action by applying the pipe unit; simulating the stress distribution and maximum stress of the buried pipeline under landslide action; and varying the model parameters to obtain the influence of different factors on the stress distribution of the buried pipeline under landslide action and the maximum stress, thereby accurately analyzing the pipe-soil interaction under landslide action.

The present application relates to the technical field of building material detection, in particular to a color stone metal tile strength detection method and system, comprising: obtaining surface reflection light distribution data and internal structure stress distribution data of the sample to be detected, analyzing surface coating uniformity and micro-morphology characteristics to generate surface quality evaluation data set; fusing surface data and internal stress data, constructing a comprehensive stress-strain analysis model, and calculating the theoretical deformation parameters and the limit bearing threshold of the sample under the preset load; according to the above calculation results, accurately guiding the loading position, force value and process in the subsequent physical strength detection. The method combines the surface microstate and internal structure information to carry out predictive modeling, realizing the transformation of the detection process from unified loading, post-judgment to predictive guidance and intelligent loading.

The invention belongs to the technical field of structural safety detection, and discloses a concrete box girder bridge section stiffness distribution updating method which comprises the following steps: (1) acquiring strain data required for updating the section stiffness of a box girder; (2) establishing a stress-strain analysis theory; (3) discretizing the cross section of the box girder to establish a numerical model; and (4) updating the rigidity distribution of the cross section of the box girder. Based on the problems that the rigidity distribution of the cross section of the box girder bridge is uneven and the stress-strain distribution of the cross section is complex, a generalized girder theory and a model updating method are used for inverting the rigidity distribution condition in the cross section of the box girder, and the stress-strain in the cross section of the box girder when the rigidity is uneven is accurately calculated. According to the method, a rigidity updating strategy taking the inertia moment and the neutral axis as constraint conditions is applied, the section rigidity distribution can be well updated, and the rigidity updating calculation efficiency is improved. Meanwhile, the method considers the special deformation mode of the cross section of the box girder, obtains the proportion of various deformation modes in the total stress, and is more beneficial to the evaluation of the stress condition.

The invention relates to the technical field of reliability testing of electronic components, in particular to a method for predicting the cycle life of vehicle gauge-grade BGA glass, which comprises the following steps: a sample preparation step; a temperature cycle test setting step; a data acquisition and recording step; constructing a finite element model; a stress-strain analysis step; and a crack initiation prediction step. The feasibility and effectiveness of the prediction method can be clearly displayed, and the method can be flexibly operated and implemented according to different product and test requirements in practical application according to the process of the method, so that the reliability of the automobile gauge BGA glass in a temperature cycle reliability test is guaranteed, and the overall quality of automobile electronic components is improved.

The invention discloses a stress-strain analysis method for a rib-wound fuel rod under a large temperature gradient, and relates to a nuclear industry technology. The method comprises the following steps: firstly, establishing a geometric model of rib-wound fuel rods, and replacing adjacent rib-wound fuel rods with fixing plates made of the same material; then, based on Ansys Workbench, a table insertion method is adopted to define material physical relations under different temperatures or irradiation conditions, and a contact relation between the cladding and the fixed plate is set; adopting an APDL function to edit cladding surface heat transfer boundary conditions, and setting the same heat transfer boundary and constraint conditions for the fixed plate; and finally, solving the temperature field and stress strain of the rib-wound fuel rod and the fixed plate based on a finite element method. According to the method, the elastoplasticity problem that the rib-wound fuel rod material is influenced by irradiation and high temperature at a large temperature gradient is considered, and the simulation model is reasonably simplified according to the mutual contact characteristic between the rib-wound fuel rods; and on the basis of saving computing resources, deformation and stress distribution of the rib-wound fuel rod in extreme environments such as high temperature and high pressure can be simulated more truly.

The application provides a stress-strain analysis method of an anisotropic material, characterized in that the method comprises the following steps: S1, establishing a geometric model of the anisotropic material, and performing mesh division on the geometric model to obtain an isolated mesh model; S2, processing each mesh unit in the isolated mesh model to obtain a directional vector of each mesh unit; S3, creating a discrete field by using the directional vector of each mesh unit of the isolated mesh model obtained in step S2; and S4, performing material coordinate paving on each mesh unit of the isolated mesh model by using the discrete field.

The present invention discloses a structural stress and strain analysis method and device based on artificial intelligence. The method includes: receiving input stress sensing information, structural drawings and monitoring images and extracting corresponding basic feature information; extracting corresponding comparative feature information from a three-dimensional structural model; judging whether the basic feature information and the comparative feature information match according to preset matching judgment rules; if they do not match, inputting the basic feature information and the comparative feature information into a preset artificial intelligence model for correlation analysis to obtain corresponding correlation analysis results; and obtaining strain measures corresponding to the correlation analysis results from a preset stress and strain database. During the structural construction process, the above method can combine actual working conditions and analyze structural deformation during the construction process through artificial intelligence to obtain strain measures and adjust the construction structure, and can efficiently perform structural stress and strain analysis when the building structure is deformed.

The present application relates to a dam simulation test platform stability analysis method under the combined action of multiple loads, comprising: modeling the steel cable used for the test platform binding fixation, analyzing the stress-strain of the steel cable; obtaining the stability boundary conditions of the structural members of the dam simulation test platform through analysis; analyzing the stability of the structural members of the test platform under large temperature difference conditions; analyzing the stability of the dam simulation test platform under the action of wind load; analyzing the load of the dam simulation test platform under the impact of sediment flow; analyzing the stress-strain of the dam simulation test platform under the combined load, and judging the stability of the dam simulation test platform. The present application calculates the sediment flow impact, wind load and snow load of the dam simulation test platform, analyzes the stress field and strain distribution of the dam simulation test platform under the combined load, judges the stability of the dam simulation test platform, and ensures the structural safety and stability of the test platform under extreme weather conditions.

The present invention discloses a bidirectional coupled electromagnetic, thermal, and stress analysis method for complex electromagnetic environments. The method includes establishing a coupled model of a fusion reactor blanket based on three-dimensional modeling design software; establishing an electromagnetic field distribution analysis model to calculate the electromagnetic field, current distribution, Joule heat, and electromagnetic force; establishing a temperature field distribution analysis model to calculate the temperature field distribution within the blanket by solving the fluid-solid conjugate heat transfer equation; establishing a stress-strain analysis model to solve the solid mechanics stress-strain equation to obtain the stress and strain mechanical property distribution of the blanket, perform blanket performance analysis, and feed back the results to the electromagnetic field distribution analysis model and the temperature field distribution analysis model for iterative analysis and calculation to obtain the final analysis results. The present invention compensates for the fact that existing analysis methods ignore the mutual influence between the electromagnetic field, temperature field, and stress field, and accurately analyzes the electromagnetic performance, thermal-hydraulic performance, and mechanical performance of the blanket under complex electromagnetic environments.

The invention provides a 3D printing method and system for an osteochondral stent. The method comprises the following steps: collecting three-dimensional point cloud data of an osteochondral defect part; reconstructing a three-dimensional model of the defect part based on the point cloud data, and performing stress-strain analysis on the model; according to a stress distribution result, establishing a porosity dynamic adjustment model to adjust pore parameters; and generating a printing path based on the target pore parameters and the three-dimensional model, and sequentially printing the subchondral bone layer, the transition layer and the scaffold cartilage layer. Model reconstruction and stress analysis are driven through medical image data, dynamic calibration of pore parameters is realized in combination with a structure optimization algorithm, multi-material printing and multi-stage crosslinking are utilized, the pore parameters are adjusted through a porosity dynamic adjustment model, and stent failure caused by stress concentration is avoided; the gradient printing and cross-linking synergistically enhance the stability of the scaffold and the slow release ability of bioactive ions, so that the cell migration efficiency, the collagen deposition quality and the osteochondral interface integration strength are remarkably improved.