29 results about "Stress gradient" patented technology

The invention relates to the technical field of machining defect monitoring, and discloses a machining defect real-time positioning and multi-physics field visualization system based on a multi-source track. The system comprises a multi-source trajectory data acquisition module for acquiring a cutter motion trajectory sequence, a temperature distribution sequence and surface topography monitoring data to form a multi-source trajectory data set; the multi-physics field reconstruction module processes the data set to generate defect distribution characteristics containing thermal stress gradient, force distribution cumulant and defect fluctuation coefficient; the defect positioning analysis module calls the pre-training model for real-time analysis and outputs a defect position predicted value and a defect type identifier; the environment compensation correction module corrects a defect position prediction value by combining a temperature distribution sequence and a material thermal characteristic incidence relation; and a visualization strategy generation module generates a multi-physical field visualization strategy set containing thermal field rendering and force field superposition schemes according to the defect type identifier.

According to the copper alloy strip residual stress rapid evaluation and improvement method based on stress feedback, a warping measurement value is accurately mapped into a stress gradient parameter through a deformation and stress conversion model, and the aging bottleneck of a traditional method is broken through; according to the method, a double-track regulation and control mechanism driven by a delta sigma threshold value is constructed, medium and low stress regions are passivated and homogenized by means of cerium salt grain boundaries, a high stress region is subjected to targeted shape protection by means of a cerium salt and thiomalic acid composite film, dialectical unification of stress release priority and overall etching efficiency is achieved on the molecular level, and a scientific and efficient stress management and control mode is provided for copper alloy strip manufacturing.

This invention discloses an adaptive compensation control method for uneven settlement in soft strata, belonging to the field of settlement control in geotechnical engineering. The method involves collecting distributed micro-strain field and pore water pressure gradient data at the bottom of the foundation in the soft strata and inputting them into a stratum rheological evolution prediction model. Multi-scale spatiotemporal features are extracted using a spatiotemporal attention coding module to generate a stratum creep trend vector. The equivalent modulus correction coefficient is calculated using a virtual stiffness reconstruction algorithm to generate a dynamic stress wave excitation parameter set. Coherent stress beams are emitted using microarray actuators embedded in the bearing layer interface, and a dynamic stress-locking zone is constructed through constructive interference to form a virtual rigid support. The excitation parameters are corrected through a dual-loop adaptive feedback control mechanism combined with a heuristic optimization algorithm until the micro-strain field returns to uniformity. Simultaneously, energy dissipation monitoring and safety mechanisms are added to mitigate the risk of soil liquefaction. This invention achieves active suppression and adaptive compensation for uneven settlement in soft strata, improving the accuracy of settlement control.

This invention discloses a method and system for characterizing the stress field transfer direction in coal seams, relating to the field of coal seam safety monitoring technology. The method includes: establishing a quantitative coupling relationship between stress and wave velocity in coal and rock samples through laboratory testing; inverting the three-dimensional wave velocity field of the working face based on microseismic monitoring data, and obtaining the corresponding three-dimensional stress field distribution according to the coupling relationship; calculating the transfer vector of the anomaly area by tracking the temporal changes of the centroid of the stress anomaly area, and obtaining the stress gradient change vector by calculating the temporal changes of the stress field spatial gradient; performing consistency analysis on the transfer vector and the stress gradient change vector, and determining the corresponding direction as the dominant transfer direction of the stress field in the coal seam region when the consistency meets preset conditions. This invention, through dual-path dynamic analysis and cross-validation, can characterize the transfer direction of the coal seam stress field at a regional scale, providing a new technical approach for the monitoring and early warning of coal and rock dynamic disasters.

The invention relates to a connection hole site iterative optimization method based on multi-dimensional stress characteristic driving. The problems existing in layout optimization of connecting hole sites of plate / shell components at present are solved. Firstly, the center position of a design domain inner hole is parameterized; calculating at least two of equivalent stress, stress gradient, principal stress direction and strain energy density under a predefined load; calculating a comprehensive influence function through a method of normalizing and weighting the multi-dimensional features; carrying out iterative optimization on the position of the guide hole in the first principal stress direction, calculating a multi-dimensional stress feature and a comprehensive influence function in each iteration, and carrying out dynamic updating on a feasible region by considering geometric and process constraints at the same time; after iterative calculation convergence, a calculation result is output, and key index verification is carried out; checking whether geometric constraints and process manufacturing conditions are met or not; and generating a sample piece and carrying out physical test verification. According to the method, optimization of multiple performance targets such as strength, rigidity and fatigue life can be achieved, and the method can also be closely combined with engineering practical application.

The invention discloses a wheel disc characteristic structure simulation part design method based on an additive manufacturing thought, which comprises the following steps of: firstly, establishing a parameterized model of a wheel disc, and acquiring stress field data of a wheel disc characteristic structure by adopting a finite element analysis means; secondly, based on stress field data of the wheel disc feature structure, an MATLAB program is written to solve a stress gradient space curve; and finally, determining the initial section size of the simulation piece based on the test condition of the testing machine, determining a size iterative formula based on the additive manufacturing idea, iteratively calculating the profile curve of the simulation piece according to the stress gradient space curve, and determining the configuration of the simulation piece in combination with the test condition of the testing machine. Compared with the prior art, the method has the advantages that stress gradient path selection, design of the initial configuration of the simulation part and size optimization of the initial configuration are not needed in the whole design process, standardization and standardization of design of the wheel disc feature structure simulation part are greatly improved, repetition of the design process is fundamentally avoided, the design period is shortened, and the design efficiency is improved.

This invention discloses an experimental apparatus and method for a similar model of a rock wall expansion. The apparatus includes a transparent experimental chamber, a layered gelatin system, a terrain simulation system, a dynamic injection system, a multimodal monitoring system, and a data acquisition and processing system. By independently adjusting the stiffness and density ratios of the upper and lower gelatin layers, combined with a detachable double-slope terrain mold, a systematic study of the coupled effects of multiple factors such as terrain, stiffness layering, density layering, and injection rate is achieved. The three-dimensional morphological evolution of the rock wall is simultaneously monitored using a multi-view high-speed camera, and the full-field displacement field, strain field, and principal stress direction during the rock wall expansion process are inverted in real time using digital image correlation technology. This reveals the control mechanism of stress gradient reversal caused by terrain on the lateral expansion and cessation of the rock wall. Furthermore, dimensionless analysis and boundary correction improve the similarity between the model and the natural prototype, providing a reliable experimental platform for volcanic eruption prediction and magma transport law research.

The invention discloses a method for establishing a two-dimensional CMC turbine blade surface Nusselt number engineering empirical relational expression, which comprises the following steps of: systematically researching the flow and heat transfer characteristics of different pressure gradient areas such as a suction surface front edge, a suction surface tail edge and a pressure surface middle section, extracting geometrical characteristic parameters of surface textures, and introducing a dimensionless correction factor, so as to establish a two-dimensional CMC turbine blade surface Nusselt number engineering empirical relational expression. A Nusselt number correction model suitable for different areas is constructed, and a heat exchange coefficient mapping relation from a smooth surface to a woven texture surface is realized. Compared with a traditional smooth surface or a general roughness empirical correlation formula, the model established by the method can more accurately reflect the influence rule of weaving texture features on the surface heat exchange distribution of different pneumatic areas, and the engineering applicability and calculation precision of heat exchange prediction are remarkably improved; and a reliable engineering analysis method and technical support are provided for heat transfer design, performance evaluation and structure optimization of CMC turbine blades and other high-temperature composite material parts.

The application discloses a kind of fatigue life simulation evaluation methods of new energy vehicle light weight aluminum alloy material, it is related to material life evaluation technical field;Microstructure image is collected and coupled feature is extracted by machine learning, complete heterogeneous data fusion and enhancement;Based on GAN generation topological optimization structure, in stress gradient dynamic grid, introduce VPSC model to describe anisotropy, construct dynamic finite element model;Fusion vehicle driving data, to LSTM prediction load, VMD decomposition and environmental correction, realize space-time correlation load spectrum reconstruction;Microscopically with phase-field model, macroscopically with XFEM crack tracking, bidirectional coupling transmission damage parameter, carry out multi-physical field coupling simulation;Bayesian inference is used to fuse simulation and test data, calculate life probability distribution, error is over limit when correcting parameter;The application ultimately reduces fatigue life prediction error, reduces the time consumption of single simulation, realizes life cycle assessment and visual early warning, provides efficient scheme for light weight design, promotes industrial technology upgrading.

This invention discloses a karst tunnel cave simulation experimental device for applying different gradient stresses. The device includes a first loading chamber, a second loading chamber, a third loading chamber, a top cover, a first oil pump, a second oil pump, a third oil pump, a first pressure regulating valve, a second pressure regulating valve, a third pressure regulating valve, a first strain gauge, a second strain gauge, a third strain gauge, and a high-speed camera mounted on the top cover. This karst tunnel cave simulation experimental device can apply different pressures to the lower, middle, and upper parts of a hollow rock specimen, thereby simulating the force exerted by different soil pressures at different burial depths on the cave. It can also observe and record the deformation and failure of the specimen using strain sensors and a high-speed camera. This device can conveniently simulate the structural changes of caves under stress gradients in engineering projects.

The utility model relates to the technical field of penetration testing, and provides multi-connected flexible wall penetration equipment which comprises a pressure control system, a gas-water conversion system and a plurality of flexible wall penetration testing systems. The pressure control system is provided with a first pressure passage and a second pressure passage, the first pressure passage outputs gas confining pressure, and the second pressure passage outputs gas osmotic pressure. And the gas-water conversion system is communicated with the second pressure passage and is used for converting the gas osmotic pressure into water osmotic pressure. The plurality of flexible wall penetration testing systems are communicated with the first pressure passage and the gas-water conversion system and are used for converting the gas confining pressure into water confining pressure and performing penetration testing on the plurality of samples under the consistent water confining pressure and water penetration pressure. According to the invention, synchronous and efficient penetration testing of a plurality of samples under the simulated actual stress condition is realized, and the device is especially suitable for low-permeability materials requiring accurate pressure gradient control and field stress condition simulation.

This invention discloses a gradient cryogenic forming method for deep-cavity thin-walled curved parts, relating to the field of metal sheet processing technology. The method includes: dividing the sheet material to be formed into a flange area, a suspended area, and a molding area; establishing a stress gradient model that prevents cracking and wrinkling based on the radial and circumferential stresses of each deformation area, and accordingly determining cryogenic cooling conditions and blank holder force loading conditions; placing the sheet material on a die and pressing the flange area; injecting a cryogenic medium into a normal-pressure buffer tank through a self-pressurizing tank, allowing the liquid portion to flow into the upper surface of the sheet material in the suspended area by gravity, thus constructing a gradient temperature field radially across the flange area, suspended area, and molding area; driving the punch downwards under a set blank holder force, causing the sheet material to deform in a coordinated manner within this gradient temperature field, ultimately forming a deep-cavity thin-walled curved part. This method effectively suppresses the simultaneous defects of cracking and wrinkling caused by concentrated deformation in the suspended area, achieving coordinated deformation in each area and ensuring a stable forming effect for the curved part.

The invention relates to the technical field of water treatment, and discloses an adsorption material for high-sulfur mining area groundwater pollution treatment and a preparation method thereof.The preparation method comprises the steps that a polymer matrix and functional filler are mixed to prepare a primary thin film, the primary thin film is fed into a cascade calendering unit, and edge transverse prestress is applied; the method comprises the following steps: generating a speed difference shear stress by adjusting a linear speed ratio between calendering rollers, inducing plastic deformation of a matrix and stripping at an interface so as to construct longitudinally communicated adsorption micro-channels, feeding back and adjusting the ratio of the rotating speed to the linear speed of a unit by utilizing the offset of a characteristic dominant frequency of an acoustic emission signal collected in real time relative to a reference frequency, compensating the discontinuity of a micro-channel structure, and finally obtaining the acoustic emission signal. The stress gradient in the width direction is eliminated through a stress field coupling mechanism, it is ensured that the topological structure of the material shows the full-width uniformity, active sites of the functional filler are forcibly exposed through a physical intervention means, the pollutant capturing capacity of the material is enhanced, and the technical problem of permeability degradation in the deep well environment is solved.

The invention relates to the technical field of metal casting, in particular to an intelligent casting method and system based on multi-dimensional parameter detection, and the method comprises the steps: monitoring the content of multi-point raw material elements in a molten pool in real time, and obtaining a component uniformity index by calculating the ratio of a content standard deviation to a self-adaptive updated standard deviation threshold value; whether putting compensation is carried out or not is decided by combining the raw material element deviation rate; the flow stability index is determined by monitoring the flow speeds of the sprue, the cross gate and the flow gate, and the pouring speed and pressure are cooperatively adjusted according to the flow stability index. The stress gradient is calculated based on multi-point surface stress values collected in real time, and the cooling water channel is dynamically adjusted to eliminate stress concentration. Closed-loop intelligent control over multiple key parameters in the whole casting process is achieved, the component uniformity and flow stability of the casting are effectively improved, cooling stress is restrained, and therefore the quality stability and the yield of the casting are remarkably improved.

The application discloses a rock unloading gradient damage test method based on non-uniform stress distribution and relates to the technical field of geotechnical engineering and rock mechanics test, and comprises the following steps: in a true triaxial servo loading device, a rock sample is divided into multiple layers along the thickness direction, and different loads are applied to each layer, so that a non-uniform stress gradient which continuously changes from the surface layer to the deep layer is formed in the rock sample. The application forms a non-uniform stress gradient which continuously changes from the surface layer to the deep layer and implements a step-by-step unloading from outside to inside, so that the whole test process is in a controllable spatial stress evolution environment, and the stress release and redistribution process under the surrounding rock excavation condition is truly simulated. Meanwhile, multi-source response information is synchronously obtained under the stable and continuous multi-layer stress state, and spatial reconstruction is carried out, so that the evolution characteristics of rock mass gradient damage are completely revealed, and a reliable test means for studying the rock mass damage mechanism under the non-uniform stress unloading condition is provided.

The utility model discloses a gradually-changed rod body, and relates to the technical field of anchoring tools. The gradient rod body comprises a main body sleeve and a connecting sleeve, a plurality of multi-section reinforcing bars are arranged in the main body sleeve and comprise upper reinforcing bars, middle reinforcing bars and lower reinforcing bars, the upper reinforcing bars, the middle reinforcing bars and the lower reinforcing bars are sequentially connected from top to bottom, and the upper reinforcing bars and the middle reinforcing bars are connected through the connecting sleeve. And the middle reinforcing steel bar is connected with the lower reinforcing steel bar through the connecting sleeve. The diameter of the upper reinforcing steel bar is larger than that of the middle reinforcing steel bar, and the diameter of the middle reinforcing steel bar is larger than that of the lower reinforcing steel bar. Reasonable reinforcement is carried out according to stress conditions of different portions of the rod body, the rod body with the maximum stress gradually changed is formed, the use amount of steel bars is reduced, the engineering cost is reduced, and meanwhile the structural strength and stability of the anchor rod are guaranteed.

The invention discloses a rectangular web-steel pipe composite space node structure with continuous rigidity distribution, which is suitable for the through connection of a main pipe and an inclined strut of an offshore wind power jacket. A rectangular web plate with a spatial curved surface is arranged on the outer wall of a main pipe of the node, and continuous curvature and continuous thickness distribution are formed through a web plate abduction function, a thickness gradual change function and a smooth transition surface, so that the outer surface of the node is kept continuous in the normal direction and the curvature direction. The web curved surface is defined in a parameterized mode, the abduction amount of the web curved surface changes smoothly in the width and height directions, the thickness is locally enhanced according to the direction of the inclined strut, bending moment, axial force and shearing force input by the inclined strut form planar diffusion on the web curved surface, and rapid turning of traditional node force flow in a narrow intersecting belt is avoided. The smooth transition curved surface between the main pipe and the web ensures that the whole structure has no geometric mutation. Hot spot stress and stress gradient are remarkably reduced, the fatigue life of the joint is prolonged, and the joint is suitable for offshore wind power jackets bearing cyclic loads and large steel structure joints.

The application discloses a new stress gradient characterization and verification method, belongs to the fatigue life prediction field of materials, and specifically comprises the following steps: firstly, a finite element model A of an actual mechanical structure is established, a dangerous point is selected, and an elastic stress gradient influence factor Y is calculated; then, notch finite element models with different stress concentration coefficients K t Values are established, and each dangerous point a' is arranged, stress gradient influence factors Y1, Y2,... Y n are calculated at the dangerous point a' in each model, compared with Y, and used for reflecting the stress gradient distribution at the dangerous point a; finally, Y is introduced into a life equation, fitting parameters are introduced simultaneously for correcting Y, a corrected life model is obtained, and the stress gradient at the dangerous point a is characterized; and a stretching test piece containing at least two notches is designed, different notch sizes are designed, and the stress gradient at the dangerous point a is verified; and the application improves the precision of predicting the fatigue life on the actual mechanical structure.

This invention discloses a wide-range gradient controllable residual stress calibration block and its preparation method, belonging to the field of stress calibration technology. The preparation method includes processing a carburized steel substrate into a blank and sequentially performing carburizing and quenching, shot blasting, grinding to remove the surface oxide layer, and shot peening. The shot-peened blocks are divided into at least two groups, and tempered in different temperature ranges to obtain blocks with different residual compressive stress levels. The different temperature ranges are selected from at least two of the following: 50-150℃, 150-250℃, and 350-450℃. At least a portion of the tempered blocks undergoes surface corrosion treatment to remove the deformation layer of a predetermined depth and fine-tune the residual stress value. Finally, the blocks are rust-proofed and stored. This invention solves the problems of existing calibration blocks having single stress values, poor stability, and short shelf life. It achieves the acquisition of stable calibration blocks with different stress gradients within the same material batch.

The application provides a fracturing fluid friction resistance field determination method and system, relates to the technical field of fracturing fluid performance parameter optimization, and comprises the following steps: deploying a sensor network at a fracturing construction site, collecting fluid parameters and geological environment parameters in real time; performing feature engineering processing based on the collected data, calculating derived features such as Reynolds number, dynamic viscosity adjustment factor and formation pressure gradient; training a prediction model by using a machine learning algorithm; inputting real-time data into the prediction model to predict the friction resistance under the current fracturing fluid conveying state; and automatically adjusting the fracturing fluid formula or pumping parameters according to the prediction result. The application realizes real-time monitoring and dynamic prediction of the fracturing fluid friction resistance, continuously optimizes the prediction model through a feedback learning mechanism, solves the problems of poor timeliness and low accuracy of the traditional method, significantly improves the adaptability to complex geological environments, and greatly improves the intelligent level and economic benefits of fracturing operations.

The present application aims to reveal the influence mechanism of stress level and stress gradient on the behavior of metal material hot salt corrosion, and provides a force-chemical coupling test method and device of metal material considering stress gradient, aiming at the technical defects that mechanical load and corrosion environment are difficult to be controlled simultaneously in the existing research. First, a variable cross-section tensile deposited salt sample is designed, which can form different stress level and stress gradient distribution areas under a single loading condition. Second, the hot salt corrosion test under external stress is carried out under the condition of controlled temperature by artificially depositing the molten salt formed in the simulation of marine environment on the surface of the sample and applying external tensile load. Finally, the corrosion morphology, oxide film structure and element distribution of the sample are systematically characterized and quantitatively analyzed. The test method of the present application is simple, highly repeatable, can realize the comparative analysis of corrosion behavior under multiple stress states, and significantly improves the efficiency and accuracy of stress-corrosion synergistic effect research.

This invention belongs to the field of deep underground engineering surrounding rock control technology, and particularly relates to a layered gradient grouting method and integrated reinforcement and sealing structure for deep underground spaces. The structure comprises: a deep permeable grouting layer, a middle high-strength reinforcement layer, and a surface high-toughness sealing layer arranged radially from the inside to the outside along the surrounding rock. The three layers meet preset relationships in terms of permeability coefficient, strength, and elastic modulus, with the permeability coefficient decreasing layer by layer, and the middle layer exhibiting the highest strength and elastic modulus. A continuous transition zone is provided between adjacent layers, resulting in a continuous transition in material properties. This structure is integrated through staged grouting from deep to shallow, radially decreasing grouting pressure, and dynamic control of grouting parameters via fiber optic monitoring. This invention achieves synergy between grouting, reinforcement, and sealing functions, forming a load-bearing and seepage-proof coupled composite surrounding rock structure that can adapt to changes in stress gradient in deep surrounding rock, eliminate weak interfaces between layers, and ensure the long-term stability and safety of deep underground spaces.

The present application belongs to the technical field of industrial detection, and provides a low-temperature fatigue crack propagation life prediction method and system based on a steel bridge deck, comprising: judging whether the crack direction deflection risk assessment needs to be started through the analysis of the sharp drop of the plasticity of steel and the non-uniformity of the local stress gradient; if so, the crack direction deflection risk is assessed through the analysis of the grain orientation difference and the strengthening phase in the weld and HAZ area; if the risk is high, the stress gradient gentle area is determined through the weld toe stress gradient cloud chart, the resistance-gradient coupling equation is established according to the minimum resistance principle and combined with the stress gradient, and the crack deflection path is determined; the crack propagation path prediction accuracy and the fatigue life prediction evaluation accuracy are improved by dividing the crack deflection path according to the crack crossing area, combining the path proportion of each stress gradient area after the division and the stress gradient distribution, calculating the actual crack propagation rate, and correcting the life prediction output result.

The application discloses a wheel disc feature structure simulation part design method based on an additive manufacturing idea, and comprises the following steps: firstly, a parameterized model of a wheel disc is established, and stress field data of the wheel disc feature structure is obtained by using finite element analysis means; then, based on the stress field data of the wheel disc feature structure, a MATLAB program is written to obtain a stress gradient space curve; finally, initial cross-sectional dimensions of the simulation part are determined based on test conditions of a testing machine, and a size iteration formula is determined based on the additive manufacturing idea, so that the contour curve of the simulation part is iteratively calculated according to the stress gradient space curve, and the simulation part configuration is determined in combination with the test conditions of the testing machine; compared with the prior art, the method does not need to select a stress gradient path, design an initial configuration of the simulation part and optimize the size of the initial configuration in the whole design process, greatly improves the standardization and normalization of the wheel disc feature structure simulation part design, fundamentally avoids repeated design processes, shortens a design period and improves design efficiency.

The present application relates to the technical field of footwear, and discloses a foot adaptive support adjustment method based on a biomechanical model, comprising the following steps: S1: foot biomechanical modeling: acquiring user foot geometry data through three-dimensional scanning, combining with gait analysis to collect dynamic load parameters, and constructing a personalized foot finite element model; S2: stress distribution calculation: sampling at 10% intervals from 0% to 100% in the gait cycle; S3: material gradient design: determining the gradient material stiffness mapping relationship according to P max distribution; S4: adaptive structure implementation: constructing a gradient sole structure through 3D printing. The high shear force area is determined by double threshold values, and a pressure gradient adaptive non-uniform honeycomb structure and configuration grading are arranged in the area, so that local deformation is dynamically controlled during the extension period and the landing period, and the effects of reducing the stress peak value of the high shear area and reducing the accumulation of friction heat are achieved.

The invention provides a method for determining a dynamic stress threshold value of a composite material blade. The method comprises the following steps: S1, determining an engine state point of dynamic stress analysis; s2, determining a modal monitoring order; s3, constructing a blade model, placing the blade model under an engine state point and a modal monitoring order, carrying out pneumatic analysis, thermal analysis, static analysis and modal analysis with prestress, and obtaining a pneumatic load and temperature load distribution result, a stress distribution result and a modal stress value; s4, static stress and modal stress of each node in at least six stress directions are obtained according to the simulation result obtained in the S3, and dangerous points and vibration stress corresponding to the dangerous points are determined; s5, determining a dangerous point influence coefficient; s6, determining a stress proportionality coefficient and a stress gradient of the patch position; and S7, determining a dynamic stress threshold value of the blade patch position. According to the method, the dynamic stress threshold value of the composite material blade can be accurately obtained.

The invention discloses an aircraft panel assembly stress distribution balance regional characterization method and system, and the method comprises the steps: dividing different regional assembly stress distribution modes and stress region types, and building a stress region division criterion which is dynamically adjusted along with errors and gaps; obtaining stress data through combination of finite element simulation and multi-sensor collaborative test measurement, and preprocessing the stress data; constructing an assembly stress balance mathematical statistical model, and defining a stress balance index integrated with an error penalty term; establishing a multi-dimensional comprehensive evaluation index system, and carrying out quantitative evaluation by adopting combined weighting and a mixed evaluation function; and assembly stress balance distribution control and process optimization are realized. According to the method, the stress gradient-stress area-error / gap three-dimensional coupling model is constructed, a complete technical chain of distribution mode division-data acquisition-preprocessing-statistical modeling-distribution comprehensive evaluation-optimization is formed, the assembly stress balance can be accurately quantified, the assembly process is scientifically optimized, and the structure failure risk is reduced.

This invention relates to the field of photovoltaic technology and provides a method and system for zoning optimization of photovoltaic tracking bracket arrays based on stress gradients. The method includes the following steps: constructing a load model, calculating the stress values ​​of each bracket in the photovoltaic tracking bracket array under different design conditions, and obtaining a full array stress distribution database; calculating and extracting the stress gradient characteristics of each bracket location, and combining the absolute stress level and location information of each bracket, using a clustering algorithm to divide the bracket array into multiple zones with different mechanical characteristics; for each zone with different mechanical characteristics, matching differentiated bracket component specifications that meet its design load and economic objectives from a pre-set modular bracket specification library. This invention, based on the full array stress distribution database and stress gradient characteristics, performs zoning optimization design, matching differentiated bracket component specifications that meet the design load for zones with different mechanical characteristics, resulting in better performance.