103 results about "Equivalent stress" patented technology

The invention belongs to the field of airplane strength fatigue life prediction, and particularly relates to an equivalent stress-based airplane typical structure multi-axial fatigue life prediction method. The method comprises the steps of determining a typical aircraft high-lock connection structure test piece; determining a fatigue load spectrum; constructing a finite element model of the typical high-lock connection structure of the aircraft; determining a dangerous part of the airplane typical high-lock connection structure test piece in finite element analysis; determining the maximum principal stress at the dangerous part of the typical airplane high-lock connection structure test piece in finite element analysis; determining the fatigue life of the test piece; fitting S-N curve data under different stress ratios according to the fatigue life of the test piece and the load spectrum stress ratio, and determining a corrected S-N curve; determining an equivalent stress-life equation of the typical high-lock connection structure of the aircraft, and substituting the maximum principal stress and fitting parameters of the corrected S-N curve into the equivalent stress-life equation to calculate and obtain a fatigue prediction life; and correcting the fatigue prediction life according to a test result.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention discloses a reaction steam turbine through-flow method and system based on variable reaction degree optimization, and belongs to the technical field of steam turbine through-flow design. The method comprises the steps that an initial geometric model of a steam turbine through-flow part and thermal boundary conditions of all stages are obtained; inputting the initial geometric model and the thermal boundary conditions into a flow field solver, and solving a flow control equation to obtain an original flow field solution; constructing a functional taking through-flow efficiency as a target, and deducing an adjoint equation corresponding to the flow control equation; solving the adjoint equation to obtain gradient information of the target functional to each level of reaction degree; inputting the gradient information into a sequential quadratic programming optimizer, and iteratively updating the reactance of each stage by combining the maximum equivalent stress upper limit of the moving blade and the lower limit of the through-flow throat area to generate a variable reactance distribution scheme; and adjusting molded line geometric parameters of each stage of stationary blade and moving blade, and outputting optimized three-dimensional molded line data and a digital model file for numerical control machining. According to the method, the in-stage flow loss is reduced, and the design robustness is enhanced.

The invention discloses a non-Gaussian fatigue analysis method considering average stress correction, and relates to the technical field of fatigue damage assessment, and the method comprises the following steps: S1, calculating an equivalent stress amplitude based on an average stress correction model; s2, introducing the equivalent stress amplitude into a non-Gaussian TB method, and establishing a non-Gaussian fatigue damage assessment method considering average stress correction; and S3, carrying out comprehensive evaluation through numerical value verification and applicability analysis. According to the non-Gaussian fatigue analysis method considering the average stress correction, a non-Gaussian spectrum method considering the average stress correction is constructed based on a non-Gaussian TB method and a typical average stress correction model, and the applicability of the method under various conditions is verified; therefore, the problem that the average stress effect cannot be considered when non-Gaussian fatigue damage estimation is carried out in the frequency domain is solved, and efficient and reliable technical support is provided for complex non-Gaussian fatigue damage estimation and life prediction.

The invention discloses a crane main beam non-probability reliability assessment method based on a convex set model, and the method comprises the steps: collecting the working condition and key section multi-source data of a crane, and carrying out the time alignment, missing measurement compensation and time-frequency feature extraction; selecting a parameter vector influencing the safety of the main beam, and constructing a combined convex set uncertain domain consisting of an interval box, an ellipsoid set and polyhedron linear constraints; based on a finite element and radial basis function substitution model, main beam key section response mapping is established, the proportion of equivalent stress and deflection relative to an allowable value is obtained, and an overall limit criterion is formed; executing worst case search in the uncertain domain, and calculating an opposite number of a maximum value of a limit criterion as a non-probability reliability index; and reliability indexes are further calculated and summarized at the section layer and the main beam layer, and the reliable state grading of the main beam is realized according to a preset threshold value. The method does not need to depend on probability distribution hypothesis, and rapid assessment of the safety of the crane girder can be realized under small sample and multi-source uncertain conditions.

The invention discloses an equivalent calculation method for quantitative evaluation of the residual life of an existing pavement and a storage medium, and the method comprises the steps: firstly, determining a bearing threshold value of a lossless pavement structure based on a dual-modulus elastic layered system theory; secondly, a reduction coefficient of typical diseases to the structural strength is quantified through finite element simulation; thirdly, establishing a mathematical relationship model of the maximum effective stress and the fatigue life; then, actual disease information is accurately obtained by combining nondestructive testing technologies such as ground penetrating radar and three-dimensional laser scanning; then, correcting the maximum allowable equivalent stress in a lossless state according to the disease data; and finally, fusing the theoretical model and the traffic load history, and calculating the remaining service life. According to the method, three-dimensional and quantitative analysis on the influence of the diseases is realized through a mechanical response equivalence principle, the accuracy, objectivity and engineering application efficiency of residual life evaluation are remarkably improved, and a reliable basis is provided for scientifically making a road maintenance decision.

A method for calculating equivalent stress of excluding wheel rail large impact interference, relates to the field of high-speed motor train unit bogie system, solves the problems that the existing equivalent stress calculation method cannot guide line maintenance, and the test data of the actual line includes the test signal of wheel rail large impact interference and cannot be eliminated, and the like, the method can predict the equivalent stress of the bogie frame after excluding the wheel rail large impact according to the actually measured wheel rail large impact signal, and can effectively guide the establishment of line maintenance standard. The method can calculate the equivalent stress amplitude of the bogie frame without large impact by excluding the wheel rail large impact interference, evaluate the line maintenance state, and predict the actual equivalent stress of the bogie frame under the condition without large impact. The reasonable line maintenance standard is established, so that the structure strength of the bogie frame meets the requirements in the use process, and damage does not occur.

This invention relates to the field of structural fatigue life prediction technology, and discloses a method and system for predicting the fatigue life of a hinged coupling, comprising: Step 1, acquiring torque and input shaft angular position data, mapping time to angular position and dividing it equally to obtain angular domain torque; Step 2, constructing a load vector based on the angular domain torque and mapping matrix, and converting it into bending stress and torsional stress; Step 3, determining the equivalent stress, principal stress surface direction angle, and rotation rate; Step 4, calculating and correcting the average equivalent stress per revolution; Step 5, calculating the load concentration factor based on the assembly misalignment angle and angular position, generating a dual-sector weight core, and combining it with the rotation rate to obtain a follow-up amplification factor; Step 6, integrating the corrected stress, weight core, and amplification factor to obtain the cumulative damage per revolution; Step 7, determining the life by accumulating multi-revolution damage, and estimating the remaining life revolutions and time if no failure occurs. This invention achieves accurate prediction of the fatigue life of hinged couplings under complex working conditions.

The invention discloses a spaceflight structure strength analysis method based on a multi-physics field, which comprises the following steps: establishing a parameterized finite element model integrated with a friction heat generation effect by acquiring in-orbit temperature time sequence data and material creep characteristic parameters, and simulating inelastic strain accumulation of a structure under a thermal cycle load; a nonlinear damage model considering a creep-fatigue interaction effect is adopted to calculate an accumulated damage degree, an effective stiffness matrix is constructed to deduce a structure inherent frequency drift distance and a shape retention capability parameter, and finally, through a safety margin evaluation algorithm, the effective strength of a material and the maximum equivalent stress of the structure are dynamically compared, so that the performance of the material is evaluated. And accurate prediction of quantitative residual strength and safe service life is realized. According to the method, the technical problems that the local thermal coupling effect is not depicted enough and the creep fatigue nonlinear interaction effect is ignored are solved, and the precision and reliability of on-orbit performance degradation prediction of the spaceflight flexible structure are remarkably improved.

The application discloses a method for determining the control range of bolt connection pre-tightening force, which comprises the following steps: firstly, establishing a finite element model of bolt connection under the condition of applying pre-tightening force; calculating the maximum equivalent stress of the connection area under different pre-tightening force conditions; constructing a radial basis function proxy model based on the pre-tightening force and the equivalent stress; considering the uncertainty of the pre-tightening force, obtaining a plurality of groups of sample points of the pre-tightening force, and calculating the corresponding equivalent stress through the radial basis function proxy model; calculating the reliability confidence factor of the equivalent stress, and taking the bolt pre-tightening force when the reliability confidence factor is greater than 1 as the control applied pre-tightening force range. Starting from the essence of the uncertainty of the pre-tightening force, the uncertainty of the pre-tightening force is described through the mean value and the multiple relationship of the pre-tightening force, the safe working range of the structure is determined according to the reliability confidence factor of the equivalent stress, the pre-tightening force control range is obtained, the traditional pre-tightening force control is expanded from a single deterministic value to a range interval, and the reliability requirement of the structure in the range is ensured.

This application discloses a method, apparatus, equipment, medium, and product for predicting damage evolution based on dynamic order reduction, relating to the field of aero-engine health management and monitoring. The method includes: conducting finite element fatigue / creep-fatigue simulation tests on structural components covering stress states under various operating conditions, and extracting the time-physics field matrix from the finite element fatigue simulation results under each operating condition; dynamically reducing the order of the time-physics field matrix to reduce its dimension, obtaining a reduced-order matrix; constructing a reduced-order model; restoring the equivalent stress field distribution based on the reduced-order model to obtain the reduced-order physical field; predicting the damage distribution evolution and fatigue life under fatigue or creep-fatigue loading based on the reduced-order physical field, and making corrections based on the fatigue life prediction model. This application can improve the efficiency and universality of life prediction.

The invention discloses an oil paper insulation life evaluation method, device and equipment of a converter transformer and a medium, and relates to the technical field of electric power engineering, and the method comprises the steps: building an insulation life improvement model based on a linear cumulative damage theory and a thermal aging model; carrying out numerical solution on the electromagnetic field and the solid force field to obtain Lorentz force density and mechanical damage accumulation equivalent stress distribution, and determining an equivalent stress translation factor by utilizing the mechanical damage accumulation equivalent stress distribution; solving numerical values of the oil paper insulation space temperature field and the electromagnetic field to obtain total eddy current loss, and determining a temperature translation factor based on the Lorentz force density, the total eddy current loss and the oil paper insulation space temperature field; calculating total acceleration factor distribution by using the equivalent stress translation factor and the temperature translation factor, inputting the total acceleration factor distribution into the insulation life improvement model, and outputting space life distribution; and carrying out oil paper insulation life evaluation on the converter transformer, realizing quantitative evaluation on insulation fatigue damage under the action of cyclic load, and comprehensively evaluating the life of an insulation material.

This invention discloses a 3D-based oil pipeline life prediction system, relating to the field of pipeline life detection technology. It includes: a contour reconstruction module S11, used to acquire three-dimensional point cloud image data of the oil pipeline shell surface under actual operating conditions, and perform surface contour reconstruction processing based on the three-dimensional point cloud image data to extract spatial geometric structure data containing local deformation defect areas; a force-thermal coupling analysis module S12, used to construct a finite element analysis mesh based on the spatial geometric structure data, and load operating condition data into the corresponding mesh nodes to generate a force-thermal coupling stress field, wherein the operating condition data includes periodic internal working pressure values, temperature field data along the pipeline, and axial disturbance stress tensor; and a feature extraction module S13, used to calculate the equivalent stress distribution values ​​of the defect area nodes based on the force-thermal coupling stress field. This invention achieves accurate quantification of fatigue damage evolution in defect areas.

The invention relates to the technical field of computer-aided engineering and structure optimization, and discloses a wind power tower crane lightweight design method based on digital twinning and multi-objective optimization, comprising the following steps: S1, constructing a full-parameterized initial three-dimensional geometric model of a wind power tower crane, and establishing a corresponding initial finite element model in a finite element simulation platform; by defining a multi-objective optimization problem taking structural mass minimization and key part equivalent stress minimization as the core and adopting a non-dominated sorting mechanism for solving, a series of Pareto optimal design schemes capable of achieving the optimal balance between the lightweight degree and the structural strength can be automatically generated; the one-sidedness possibly caused by traditional single target optimization is avoided, and designers can make decisions in a more comprehensive tradeoff space, so that the structural weight is remarkably reduced, the stress level is effectively controlled, and the overall safety and reliability of the tower crane are guaranteed.

This application discloses a fatigue design method for high-strength bolts used in aircraft wheels, specifically relating to the field of aircraft components. The method includes: determining the bolt preload and preload torque based on the bolt's nominal diameter, the bolt material's yield strength, and a first preset relationship, combined with the bolt's application environment; determining the minimum and maximum stresses on a single bolt; determining the stress cycle ratio of a single bolt; when the stress cycle ratio reaches a preset value, determining the equivalent stress based on the minimum and maximum stresses on a single bolt; determining the bolt's cycle life based on the equivalent stress, and combining the product of the tire's rolling circumference and the aircraft's takeoff and landing distance to determine the bolt's takeoff and landing life. Based on the above method, the service life of high-strength bolts under fatigue cyclic loading can be improved.

The invention provides a seamless track blow-off locking miniaturized high-precision measurement method and device, and the method comprises the steps: collecting the rail seam opening degree and steel rail temperature data in real time, and constructing a state input vector; calculating the strain and equivalent stress of the steel rail based on the state input vector, and introducing a structural position sensitive correction term to improve the accuracy of stress estimation; the locking state in the rail seam diffusion process is identified through the lightweight gated loop network model by utilizing the time sequence data of the strain and the corrected stress, and a state classification label is output; and according to the state classification label and the corrected stress value, generating a locking operation suggestion, and providing a visual prompt for construction personnel through terminal equipment. According to the method, a stress estimation method is combined with a time sequence analysis algorithm, so that state judgment is converted from a static index to a dynamic trend, and the locking decision-making efficiency and reliability in the construction process are remarkably improved.

The invention provides a spherical joint accelerated life test design method and device, and the method comprises the steps: determining the accelerated life test acceleration stress according to the actual use condition of a spherical joint; adopting a finite element analysis method to obtain a stress spectrum of the spherical joint of the pipeline system under the load corresponding to the preset flight profile; integrating and converting the stress spectrum into an equivalent stress spectrum by adopting a rain flow counting method and a Goodman formula; according to the equivalent stress spectrum, the S-N curve, the Miner damage accumulation theory and the preset total number of flight times, the number of cycles corresponding to the accelerated stress of the accelerated life test is obtained; and determining a test scheme according to the accelerated stress and cycle index of the accelerated life test. The test frequency is reduced by amplifying the stress of the spherical joint under the use condition of an aircraft.

The application provides a kind of bird impact simulation calculation method and device for the multi-physical process of bird impact on aero-engine blade in the field of aviation, reads the initial parameters of the geometric model of bird and engine blade, respectively assigns the initial parameters to SPH particle and the finite element of engine blade;Search the particle adjacent to the SPH particle;Based on the search results, the update parameters of the SPH particle and the finite element are calculated respectively;Determine whether the finite element is converted into SPH particle;If not, the unconverted finite element updates the finite element parameters according to the update parameters of the finite element;If yes, the converted finite element calculates the update parameters of the SPH particle using the SPH update parameter calculation method, and updates the SPH particle parameters;According to the updated SPH particle parameters and the updated finite element parameters, the bird body breaking, engine blade deformation and equivalent stress change diagram can be visualized and displayed.The application realizes the multi-physical process of real-time reproduction of broken bird body and blade damage fragments and their secondary impact on the blade structure.

This invention provides a safety assessment method and system for a multifunctional working platform for bridge railings based on the finite element method. It relates to the technical field of safety assessment methods, including constructing a three-dimensional finite element model of the bridge railing platform, obtaining wind load data for each mesh node of the three-dimensional finite element model; calculating the temperature field distribution data of the entire structure within a preset assessment time period, extracting the equivalent stress time history of key areas; correcting the stress amplitude using the Goodman average stress correction method; calculating the total cumulative fatigue damage degree of key areas within the preset assessment time period using the Miner linear cumulative damage method; calculating the dynamic safety margin index of the three-dimensional finite element model, and performing a graded assessment of the dynamic safety margin index. By calculating the wind pressure coefficient through the fluid domain and mapping it to the finite element model, the stress and temperature distribution of the structure in the actual environment can be realistically simulated, making the assessment results closer to engineering reality.

The invention relates to the field of modeling methods of finite element models, in particular to a modeling method of a steel structure combination node finite element model. The method comprises the following steps: firstly, preprocessing collected data to obtain preprocessed data; constructing an initial three-dimensional geometric model based on the preprocessed data; performing optimization based on the preprocessed data and the initial three-dimensional geometric model to obtain optimized geometric parameters; then, on the basis of the optimized geometric parameters, the preprocessed data and the initial three-dimensional geometric model, a steel structure combination precise node finite element initial model is output; and finally, on the basis of the steel structure combination accurate node finite element initial model, a nonlinear dynamic response updating formula is constructed, and equivalent stress is obtained. The technical problems that single parameter assignment neglects the stress synergistic effect of a node component, the modeling efficiency is low, the stress calculation error is large, and different section parameters and load working conditions cannot be accurately adapted are solved.

The invention provides an oil field well casing residual strength evaluation method and system based on numerical simulation, and relates to the technical field of oil field development casing safety evaluation. Based on the casing damage evaluation basic data of the target oil field block, establishing a block scale fluid-solid coupling numerical model reflecting an injection-production dynamic and formation mechanical response coupling relationship, and obtaining redistributed crustal stress field data around a shaft; redistributed crustal stress field data are used as boundary conditions, a three-dimensional coupling mechanical model containing a stratum, a cement sheath and a casing pipe is established in combination with the casing pipe structure and material parameters, and the stress distribution and the maximum equivalent stress of the casing pipe under the injection-production load effect are obtained through numerical simulation; and based on the maximum equivalent stress and the yield strength of the casing material, performing residual strength evaluation and damage risk grading on the casing according to the strength utilization rate and the residual strength coefficient. Therefore, the accuracy and the dynamic prediction capability of the residual strength evaluation of the oil field casing are improved, and a scientific decision basis is provided for casing damage treatment.

The application relates to a high-temperature alloy cross-piercing process interlayer defect prediction method and model, and particularly relates to a high-temperature alloy cross-piercing process interlayer defect prediction method and model, which comprises the following steps: establishing a high-temperature alloy cross-piercing finite element model, and performing high-temperature alloy cross-piercing finite element simulation; extracting all data of equivalent strain, temperature, strain rate, maximum shear strain, stress triaxiality, maximum shear stress, equivalent stress and maximum shear strain at the moment of deformation termination in the whole deformation process; calculating integral to determine damage value, average temperature and average strain rate; and performing high-temperature alloy compression-shear deformation experiments under the average temperature and average strain rate determined in the previous step. The application can predict engineering fracture problems in an actual deformation process through simple compression-shear hot simulation deformation experiments and finite element simulation technology, reduces the trial-and-error process in the actual production process, and saves manpower, material resources and financial resources.

This invention relates to the field of digital twin technology, specifically a method for predicting the remaining service life of directly buried compensators based on digital twins. The method includes collecting pipeline geometric data, compensator structural data, and soil physical parameters of a directly buried heating pipeline segment; constructing a three-dimensional mesh model and calculating the soil spring stiffness matrix based on the soil physical parameters to build a baseline finite element twin model; acquiring cyclic hardening curves and temperature-related yield strength data to generate a physical field coupling model; acquiring operating temperature time series and internal pressure fluctuation sequences to form a thermo-mechanical coupling simulation model; driving the thermo-mechanical coupling simulation model to perform nonlinear iterative calculations, outputting equivalent stress response time history and plastic strain range data; and calculating and outputting the predicted remaining service life value by modifying the fatigue damage assessment model. This invention constructs a strongly coupled analysis system of structure-thermal-soil multi-physics fields, improving the comprehensive reliability of remaining service life prediction results under complex coupling environments.

This invention relates to the field of electronic digital data processing technology, specifically to computer-aided engineering calculation and numerical simulation data processing technology. This invention discloses a design method for determining the maximum hanging weight of an ultra-thin lifting beam. In incremental iterative solutions, the equivalent stress gradient and strain energy density are extracted in real time to calculate local instability characteristic values. When the rate of change of element strain energy density exceeds a threshold, a mesh reconstruction mechanism is triggered. The nodal displacement field and stress field are extracted as initial boundary conditions. The coarse mesh is split into a fine mesh, and the coordinates of newly added nodes are smoothly interpolated based on the minimum potential energy principle. The local and global mesh degrees of freedom are coupled and assembled to continue nonlinear buckling analysis iterations until the load-displacement curve shows an extreme point. The corresponding load is then extracted as the maximum hanging weight. This invention avoids stiffness matrix singularities and computational divergence caused by distortion of the fixed mesh in local instability regions, ensuring the computational convergence of determining the maximum hanging weight.

The invention discloses a reinforcing structure and a construction method for a large hole in the side wall of a regenerator, and relates to the field of regenerators, the reinforcing structure comprises a regenerator barrel, a square hole and a reinforcing assembly, the square hole is formed in the side wall of the regenerator barrel, the reinforcing assembly is located on the regenerator barrel, and the reinforcing assembly comprises a reinforcing protection plate, a reinforcing frame and a reinforcing vertical plate; the reinforcing protection plate is arranged on the whole circle outside the cutting line of the square hole, the reinforcing protection plate and the regenerator cylinder are fixedly arranged, the reinforcing frame is welded to the outer surface of the reinforcing protection plate, and the reinforcing frame is formed by splicing HW-shaped steel. By means of the arrangement mode that the reinforcing protection plates, the reinforcing frames and the reinforcing vertical plates are matched, through the composite reinforcing structure of the reinforcing protection plates, the reinforcing frames and the reinforcing vertical plates, finite element modeling optimization design is combined, the equivalent stress of the reinforcing structure under the dual action of gravity and wind load is smaller than or equal to 61.3 MPa, then reinforcing protection on square holes is facilitated, and the service life of the square holes is prolonged. The collapse risk caused by buckling at the square hole can be conveniently prevented.

The invention discloses a cushion packaging structure optimization design method and system based on finite element simulation, and relates to the technical field of cushion packaging finite element analysis. According to the method, preset phase change characteristic data, cushion energy absorption data and simulated working condition boundary data are obtained for a transportation packaging scene with phase change characteristic contents; constructing a fluid-structure interaction finite element model; and obtaining an equivalent stress coefficient envelope value through time-history envelope analysis, correcting the buffer energy absorption data according to the difference between the envelope value and a preset constraint threshold value, and outputting target buffer energy absorption data after iteration is performed until a convergence condition is met. According to the method, the phase change dynamic characteristics of the content can be accurately adapted, and the protection reliability and simulation optimization efficiency of the whole transportation period of the cushion package are effectively improved.

The invention relates to the technical field of metal structure corrosion resistance data processing, in particular to a simulation calculation evaluation method for corrosion resistance of a multi-welding-seam area, which comprises the following steps: establishing a three-dimensional finite element model according to welding seam geometry and material parameters of a base metal / heat affected zone / weld nugget area; directly importing the obtained continuous residual equivalent stress field into a three-dimensional finite element model in the form of an interpolation function or an external field, and constructing stress dependent electrochemical parameters in an electrode dynamic boundary condition; after parameter setting is completed, electrode surface corrosion potential distribution and local current density are solved; and evaluating the corrosion resistance of the welding seam area according to the current density distribution, the corrosion rate field and the time-varying corrosion depth data obtained by simulation. According to the scheme, the method can be used for judging the sensitive position of the multi-welding-seam area, the corrosion resistance of the multi-welding-seam area can be evaluated more systematically and visually, the possible corrosion sensitive position can be recognized in advance, and risks can be found more timely in engineering application.

The invention provides a power station boiler heating surface furnace tube wall temperature and stress prediction method and system under a deep adjustment working condition. The method comprises the following steps: analyzing factors influencing the furnace tube wall temperature and stress of different heating surfaces of a boiler to obtain key operation parameters; measuring points are arranged at corresponding positions of different heating surfaces in the boiler based on the key operation parameters, and thermal parameters and flow data of steam and flue gas during operation of the boiler are collected as operation data; establishing heat, solid and flow coupling models of different heating surfaces of the boiler by utilizing a finite element method, and obtaining maximum wall temperatures and maximum stresses of the boiler tubes of different sections of each heating surface under different deep adjustment working conditions; the finite element analysis result of each heating surface is used as sample data, a machine learning algorithm is used for training, and a furnace tube wall temperature segmented prediction model and an equivalent stress segmented prediction model are established; and inputting the operation data of the field measurement points into the furnace tube wall temperature segmentation prediction model and the equivalent stress segmentation prediction model, and calculating and outputting the furnace tube wall temperature and stress of different segments of each heating surface of the boiler on line.

The present application relates to the test method and system of the effect stress field simulation wave shape mode of cold-rolled thin strip, the method comprises the following steps: obtaining the cold-rolled thin strip sample, treating the cold-rolled thin strip sample to form the original speckle, detecting and calibrating the original speckle, and obtaining the test result by heating the local heating area to simulate the wave shape evolution process.The present application simulates the residual stress and wave shape evolution process of the cold-rolled thin strip by using thermal stress and records, which is convenient for the research of elastic buckling theory and strip shape control technology.