238 results about "Failure mechanism" patented technology

The invention relates to the technical field of direct-current power supply fault diagnosis, in particular to a fault self-diagnosis modular direct-current power supply system, which is characterized in that a failure mechanism dynamic modeling unit constructs a multi-stress coupling degradation mapping library, adopts a degradation mechanism decoupling algorithm to separate and superpose failure effects and generates a dynamic degradation model; the early degradation capture unit deploys a high-frequency wide-domain sampling circuit and a noise suppression signal chain, combines time-frequency domain joint feature extraction and separates degradation feature signals from background noise, and the self-adaptive life prediction unit adopts a long short-term memory network and random forest fusion algorithm to dynamically correct parameters and output residual life probability distribution. The intelligent fault judgment unit realizes progressive diagnosis through a hierarchical threshold decision mechanism, and the health management cooperative execution unit triggers a pre-maintenance strategy, executes power flexible derating, redundancy switching or directional fusing isolation, and improves the reliability of the system.

The invention discloses a deep sea environment biaxial loading in-situ test system and method for industrial CT, the test system comprises a biaxial test bench, a deep sea environment box, a rotary table, a simulation seawater loop and an X-ray imaging unit, the deep sea environment box is arranged at the central position of the biaxial test bench, the biaxial test bench is arranged on the rotary table, the rotary table is arranged on the rotary table, and the X-ray imaging unit is arranged on the rotary table. And the X-ray imaging unit directly faces the biaxial test bench. In order to solve the problems that no effective means for simulating the complex stress and corrosion coupling environment of the deep sea environment exists at present, and key data such as chemical products in the corrosion process of marine materials under the complex stress cannot be obtained in situ, the invention provides a coupling biaxial in-situ loading device and a seawater corrosion environment simulation box. Simulation of a deep-sea complex stress state and a seawater corrosion environment is realized, a chemical product evolution rule in a stress corrosion process is obtained in situ based on a spectrum measuring instrument, and a technical foundation is laid for clarification of a corrosion failure mechanism of a material under a real deep-sea service condition.

The invention relates to the technical field of knowledge maps, in particular to a steel manufacturing knowledge map construction method based on multi-source heterogeneous data, which comprises the following steps: converting message data into a standardized semantic triple through a semantic mapping rule, and complementing missing attributes by using physical and chemical component balance logic to form a standardized entity; meanwhile, a semantic processor is used for extracting unstructured report text logic, cross-modal coupling is carried out on the unstructured report text logic and SEM image features, and a failure mechanism enhanced entity is generated. Then, full-process dynamic parameters are collected and regularized into equal-interval time sequence parameters; and finally, taking the normalized entity as an index feature and the mechanism enhanced entity as an association constraint, executing semantic fusion by utilizing a topological feature mapping engine, and constructing a dynamic weight graph structure by combining with a dynamic probability distribution correction operator iteration parameter weight. According to the method, efficient association and semantic organization of manufacturing whole-process multi-modal data are realized, and the retrieval precision and knowledge discovery capability of steel manufacturing data are greatly improved.

The invention relates to an intelligent temperature control rock heat-water-force-sound-light multi-field coupling disturbance shearing device and a use method of the intelligent temperature control rock heat-water-force-sound-light multi-field coupling disturbance shearing device. A disturbance shearing mechanism composed of a trapezoid pressing rod, a constant damper and a spring is additionally arranged on the driving side of the lower shearing box. When the tangential loading shaft is propelled at a constant speed, the mechanism can convert stable linear displacement into disturbance shear load of periodic loading and unloading, so that engineering power disturbance is simulated. According to the device and the method, periodic shear disturbance is synchronously applied to a rock sample in a high-temperature seepage environment, mechanical response, seepage characteristic change, internal micro-fracture and surface full-field deformation of the rock sample are comprehensively observed, and an advanced test means is provided for researching a catastrophe mechanism of a deep rock mass under the action of multi-field coupling and dynamic disturbance.

The invention belongs to the technical field of aircrafts, and discloses a trigger-containing aircraft composite material energy absorption structure analysis method, which comprises the following steps: establishing an external trigger composite material structure model according to actual working conditions; constructing an intra-layer and inter-layer damage coupled progressive damage model; configuring finite element model parameters adaptive to the composite material; integrating simulation results; the crashworthiness of the coupling trigger structure is adjusted and optimized in combination with basic parameters; repeating the steps to verify the optimization effect; and predicting the strength of the composite material by coupling stress strain and damage transfer, revealing a damage failure mechanism and determining an optimal design. The method has the beneficial effects that the failure mode and the load response of the aircraft structure under different impact loads can be accurately captured, and low initial peak load and high specific energy absorption requirements are considered through multi-type triggering collaborative design; reliable technical support is provided for crashworthiness design of composite aircraft structures of aircraft fuselage frames, wing supports and other key structures in the aerospace field.

The invention provides a performance evaluation method and system for an electric connector insulator, and relates to the technical field of electric connectors, and the method comprises the steps: carrying out the electrothermal coupling simulation of the electric connector insulator, and determining a temperature distribution field of the electric connector insulator; according to the temperature distribution field, failure mechanism analysis is carried out on the electric connector insulator, and a carrier concentration change model of the electric connector insulator is constructed; constructing an insulation resistance degradation model based on the carrier concentration change model; obtaining measurement data of the electric connector insulator through an acceleration test; fitting parameters of the insulation resistance degradation model through a least square algorithm and a maximum likelihood estimation algorithm according to the measurement data; according to a parameter fitting result, constructing a reliability statistical function based on a weakest ring model; and according to the reliability statistical function, performing performance evaluation on the electric connector insulator. According to the method, the failure probability and the service life of the electric connector connecting piece under different working conditions can be accurately predicted.

The invention provides an improved Arcan disc complex stress metal fatigue test method. The method specifically comprises the following steps: (1) designing clamps for stretching, stretching-shearing and pure shearing fatigue tests; (2) designing a clamp for compression, compression-shear and pure shear fatigue tests; (3) designing a stretching-shearing or compression-shearing sample, and connecting the clamps designed in the step (1) and the step (2) to a clamping rod and a pin required by a fatigue testing machine; and (4) assembling the clamps designed in the step (1) and the step (2) and the sample designed in the step (3), and connecting to a fatigue testing machine by using a clamping rod and a pin. The metal fatigue performance test under different stress states such as stretching / compression, stretching-shearing / compression-shearing, pure shearing and the like can be realized, the fatigue test result difference caused by different stress states can be quantified, optical and high-resolution scanning electron microscope observation under in-situ conditions can be compatible, and the fatigue failure mechanism analysis is facilitated.

The invention provides a motor stator potting structure failure risk assessment and optimization design method. The method comprises the following steps: firstly, establishing a simplified numerical calculation domain based on a potting structure, carrying out grid and time step length independence verification, carrying out parameter sensitivity analysis and experimental measurement, and establishing a high-precision thermal-mechanical coupling numerical calculation model; then, in combination with the simulation result and the temperature change constitutive characteristics of the ultimate strength of the material, a node-level failure risk calculation method is provided, failure risk indexes of different stress forms are obtained, and a weighted comprehensive failure risk evaluation standard is determined according to the contribution degree of the stress forms to failure behaviors; and finally, proposing a parameterized structure optimization scheme according to a dangerous area and a dominant failure mechanism, carrying out quantitative evaluation and optimization on the candidate scheme under a weighted comprehensive failure risk evaluation standard, and determining a final structure optimization scheme. The method has the advantages of closed flow loop and quantifiable indexes, and is suitable for reliability design and life evaluation of the motor encapsulation structure.

The invention belongs to the technical field of power semiconductor devices. The invention provides a SiC MOSFET surge current transient electrothermal coupling failure modeling method. A real packaging three-dimensional structure model is established, and material parameters are defined; dividing grids, constructing a current and solid heat transfer module, applying surge waveform data and realizing real-time coupling; carrying out transient solution to obtain temperature data, extracting a hot spot area and comparing thermodynamic critical parameters of the material; and establishing a multi-class failure mechanism model, and outputting a failure prediction result and reliability evaluation. The method is high in structural reduction degree, transient temperature rise and hot spot distribution can be accurately simulated, the problems that modeling is not accurate, transient electrothermal coupling analysis is lacked and a real failure mode cannot be reflected in the prior art are solved, the failure position, mode and threshold value can be accurately predicted, the method is suitable for reliability evaluation under the multi-surge condition, and the method is suitable for popularization and application. And the method has engineering application value and research significance.

The invention belongs to the technical field of geotechnical engineering and rock mechanics testing, discloses a stress-strain mixed control-based rock stable failure testing method, and aims to solve the problem that a stress path cannot be maintained and brittle failure cannot be inhibited simultaneously after rock peak strength is detected in an existing true triaxial test. The method comprises the following core steps: firstly, determining a target stress state and a strain growth rate threshold value; then hydrostatic pressure loading is carried out; loading and unloading at a fixed proportional rate in a stress control mode; and when the strain rate reaches a threshold value, switching to a stress-strain hybrid control mode, converting the maximum principal stress direction into strain control to stabilize the damage process, and dynamically coordinating stresses in the other two directions based on real-time feedback to enable the whole damage process to maintain a preset stress path all the time. According to the invention, the complete and stable test of the pre-peak-post-peak mechanical behavior of the rock under any complex stress state can be realized, and a key technical support is provided for accurately verifying the strength criterion and researching the failure mechanism.

The invention provides a method for analyzing a main failure mechanism of a battery with an electrolyte leakage fault. The method comprises the following steps of: performing calendar aging, cyclic aging and reference performance test on a normal battery and a leakage battery; comparing the external characteristics of the normal battery and the leakage battery, and obtaining the difference between the leakage battery and the normal battery in the aspect of external characteristic performance; carrying out deep analysis on the dynamic degradation mechanism of the liquid leakage battery by utilizing an in-situ analysis means; obtaining a normal battery pole piece and a fault battery pole piece, and characterizing the battery pole pieces by using an electrochemical characterization means; battery regeneration is realized by using a battery pole piece, re-supplementing electrolyte and manufacturing a button battery; performance testing and aging testing are performed on the regenerated battery; the performance of the regenerated battery is evaluated; and a failure mechanism of the battery with liquid leakage is disclosed. And comparing the performance difference between the regenerative battery and the normal battery, and determining the irreversible influence of the fault on the battery. According to the invention, the main way of failure of the battery with liquid leakage and the irreversible influence of the liquid leakage fault on the battery can be revealed.

The invention relates to the technical field of hydroelectric power generation equipment state monitoring, in particular to a hydropower station equipment operation and maintenance risk assessment method and system based on big data analysis, and the method comprises the steps: 1, carrying out the fusion collection of specific data of a hydropower station; step 2, hydraulic-mechanical coupling feature extraction; step 3, dynamically constructing a fault propagation network; and 4, generating a dynamic risk field and outputting a decision: injecting the coupling factor and the wet pollution index into equipment network nodes, generating risk density distribution through three-dimensional space interpolation, dynamically adjusting a risk threshold in combination with a real-time working condition, and outputting a priority maintenance node and a maximum maintenance time window under a constraint condition. Through deep analysis of a hydraulic-mechanical coupling failure mechanism, an equipment cluster risk conduction path is quantified, and dynamic risk assessment is realized in combination with a big data analysis technology, so that the accuracy, real-time performance and efficiency of hydropower station equipment operation and maintenance are remarkably improved.

The invention discloses a super-hydrophobic anti-icing coating for a power transmission tower steel structure and a coating test method, and belongs to the technical field of material engineering and surface protection. Comprising the steps of super-hydrophobic coating formula optimization, geometric self-adaptive spraying and curing, extreme environment simulation testing, multi-source data acquisition, failure mechanism analysis and prediction, performance optimization and prediction and the like, the thickness of the prepared coating is 0.15 + / -0.008 mm, the coating covers a Q235 steel base material with the surface roughness of 2.0 + / -0.15 microns, and the coating has the good corrosion resistance under the environment of-40 DEG C to 60 DEG C, the wind speed of 15 m / s and the humidity of 85% RH. The icing amount is less than or equal to 30g / m < 2 >, and the deicing efficiency is greater than or equal to 92 The technical problems that in the prior art, a coating is insufficient in hydrophobic performance and durability, a coating process is poor in adaptability on a complex geometric structure, test environment simulation is not real, and a systematic optimization and prediction model is lacked are solved.

The invention discloses a real-time mapping and evaluation method for the reliability of complex equipment, which is based on physical information neural networks (PINNs) and a model system engineering (MBSE) model, and is characterized in that the method comprises the following steps of: (1) carrying out real-time mapping and evaluation on the reliability of the complex equipment, and (2) carrying out real-time mapping and evaluation on the reliability of the complex equipment based on the MBSE model, and (3) carrying out real-time mapping and evaluation on the reliability of the complex equipment based on the MBSE model, and (4) carrying out real-time mapping and evaluation on the reliability of the complex equipment. The method comprises the following steps: firstly, constructing a system architecture model of equipment by utilizing MBSE, and defining reliability constraint parameters; a partial differential equation describing a component failure mechanism is extracted, a neural network agent model integrating physical information constraints is constructed, and a loss function of the neural network agent model is formed by weighting a data driving item and a physical residual item. Mapping real-time working condition parameters into PINNs input by establishing a data interface of a system architecture model and a PINNs agent model, and outputting a physical performance degradation state; and finally, calculating real-time reliability based on the probability statistical model, and dynamically feeding back the real-time reliability to the system architecture model to update a demand verification state and generate a control instruction. According to the method, the physical partial differential equation is introduced as the regularization constraint of the neural network, so that the problem of poor generalization ability of a pure data driving model under a small sample working condition is solved, and online evaluation and closed-loop control in an equipment operation stage are realized.

The invention relates to the technical field of rock mechanics and underground engineering, in particular to an anchored jointed rock mass multi-field coupling creep characteristic analysis method which comprises the following steps: preparing anchored rock mass samples which are corroded by inorganic salt and contain different joint occurrences, and installing different pre-stressed anchor rods. And carrying out a graded loading creep compression experiment, and synchronously collecting axial deformation and acoustic emission signals. And drawing a creep time-history curve based on deformation data, and determining long-term strength and a creep stage by adopting a steady-state creep rate method. And calibrating the crack initiation and expansion process of the crack at each stage of creep deformation by using an acoustic emission signal. And analyzing response differences between crack development and anchoring failure under different inorganic salt components, concentrations, joint occurrence and prestressing forces, and determining the influence degree of each factor on the anchor rod support effect in each creep deformation stage. According to the method, synchronous quantitative analysis of macroscopic creep characteristics and microscopic damage evolution is realized by coupling chemical corrosion and prestress action, and the accuracy of long-term strength prediction and anchoring failure mechanism understanding is improved.

The application discloses a network-constructing type energy storage multi-scenario operation boundary quantification method and system considering coupling constraints, comprising: acquiring multi-source parameters and constructing a characteristic vector; the characteristic vector comprises a first characteristic vector: a network-constructing working condition vector and a second characteristic vector: a battery state response vector; based on the failure mechanism of each dimension of electricity, heat and life, a multi-dimensional dynamic safety threshold vector is determined; and a joint safety margin function is constructed according to the multi-dimensional dynamic safety threshold vector, the first characteristic vector and the second characteristic vector; combined with the joint safety margin function, a boundary quantification algorithm based on adaptive sparse grid and GPR dynamic reconstruction is used to solve a failure boundary point set; a failure boundary is constructed according to the failure boundary point set; and according to the failure boundary, a double-track quantification evaluation and a state label output mechanism are used for boundary triggering output or safe operation output. The application significantly improves the real-time performance, fineness and engineering landing ability of the safety operation boundary quantification evaluation under the network-constructing energy storage full working condition atlas.

The present application relates to the field of slurry shield construction, and particularly to a test device and a test method for simulating slurry shield face disaster in composite stratum, comprising a model box, a shield system, a slurry generating system and a monitoring system; the present application discloses a test device for simulating slurry shield face disaster in composite stratum; the test device disclosed by the present application can be applied to round gravel-mudstone composite stratum; meanwhile, the present application adopts fluctuation type slurry pressure to supply slurry to the slurry bin; the actual working condition of the slurry shield can be better simulated, so that the test device disclosed by the present application can be used to reveal the passive failure mechanism of the round gravel-mudstone composite stratum slurry shield face, and provide technical support for the slurry burst early warning; meanwhile, the test device can provide indoor test ideas for the failure process of the shield face in similar binary composite stratum.

The application discloses a high-speed current-carrying friction in-situ test system and relates to the technical field of precision instruments, which comprises a macro-micro power loading module, a constant force loading module, a current loading module, a force monitoring module and an in-situ detection module. The macro-micro power loading module controls the relative motion of the friction pair to be tested. The current loading module is used for loading current between friction amplitudes. The in-situ monitoring module comprises three in-situ monitoring means, namely acoustic emission, infrared thermal imaging and a high-speed camera. The application can support the test of high-speed current-carrying friction conditions such as multi-angle and multi-posture macro-micro-motion-static coupling, and can simultaneously acquire time sequence information of temperature fields, optics, acoustics and vibration, and further acquire time sequence information of thermal energy, arc intensity, adhesive wear degree, fatigue wear degree and deformation energy of the friction pair, which helps to deeply understand the failure mechanism and modification mechanism of high-speed multi-condition current-carrying friction amplitude and accelerates the optimization work of the current-carrying friction performance of the current-carrying friction pair.

The invention discloses an electronic product reliability evaluation method fusing a failure mechanism and data analysis, and relates to the technical field of electronic device evaluation, the method comprises the following steps: obtaining a preset sensitive parameter data set of a to-be-evaluated device, and processing the preset sensitive parameter data set according to a preset degradation model to obtain a degradation data set; performing micromechanism and device structure simulation based on the degradation data set to obtain a life simulation error; fitting the degradation data set according to a preset life distribution model to obtain a reliable confidence coefficient; and obtaining an evaluation result based on the reliability confidence and the life simulation error. The invention is used for providing a degradation mode recognition system combined with a microscopic failure mechanism to improve the reliability index.

This application discloses a method and system for testing the shielding performance of electrical wires, relating to the field of functional testing technology. The method includes: acquiring multi-frequency external excitation response data of the cable under test without disassembling it; obtaining the transmission characteristic curve by measuring the frequency domain according to a preset measurement arrangement and scanning steps; establishing a hierarchical equivalent network model based on the transmission characteristic curve and structural parameter set, and generating the parameter range to be inverted for each shielding layer; prioritizing the inversion of the outermost layer and subtracting the influence of the outermost layer to obtain an updated transmission characteristic curve; solving the parameters of the inner layers on the updated transmission characteristic curve and obtaining the interlayer coupling correction factor by comparing the difference sequence with the coupling threshold; summarizing and comparing with each threshold to output the location and type of failure layer; and outputting which layer and what failure mechanism the result falls into, reducing the risk of rework and disputes caused by the inability to attribute the cause in the overall test.

The invention discloses a double-anchor-disc screw anchor parameter optimization method and system based on plastic zone evolution, and relates to the technical field of geotechnical engineering. The method comprises the following steps: constructing a dynamical model in the installation process of the screw anchor, extracting a state parameter field of a screwed-in soil body, and mapping the state parameter field to a static bearing model; carrying out loading simulation, extracting topological characteristics of a plastic zone by utilizing a persistent coherence theory, generating a persistent barcode, and judging an upper and lower anchor disc interference mode according to the persistent barcode; and performing iterative optimization on the geometric parameters based on the interference mode. The method is used for solving the problems that an installation disturbance effect is ignored and a plastic zone cut-through failure mechanism is difficult to objectively recognize in an existing design, and precise parameter design considering bearing safety and construction economy is achieved.

The invention relates to the technical field of refractory materials of copper smelting furnaces and furnace lining structures, and discloses a method and a device for prolonging the service life of a furnace lining of a multi-gun top-blown furnace, and the method comprises the following steps: forming function partitioning strategies aiming at different failure mechanisms, and determining key performance indexes required by the refractory materials in each region; according to key performance indexes, a composite brick lining main body structure of a working layer, a transition layer and a backing layer is adopted, and a precast block reinforcing layer and a surface wear-resistant castable layer are additionally arranged at extreme parts of a slag line, a spray gun impact part and the like, so that a local double-layer brick wall and an anti-scouring protection cambered surface are formed, and an integrated furnace lining structure is constructed; based on an integrated furnace lining structure, a flow field, a temperature field and a stress field in a furnace are verified and adjusted through CFD and finite element simulation, a flexible heat insulation buffer layer is synchronously integrated, and a reliable furnace lining optimization scheme is obtained. The device comprises a working layer, a transition layer, a heat preservation layer, a slag layer and a copper layer. The service life of the furnace lining is systematically prolonged.

This invention relates to a method for early warning of the resilience margin of mountain roads during rainstorms and floods based on multiple failure mechanisms. The method includes: acquiring multi-source monitoring data in real time; preprocessing the data to obtain an extended state vector at the current moment; establishing resilience critical boundaries for different failure mechanisms based on pre-generated labels, forming a multi-failure mechanism resilience critical boundary model library; mapping the extended state vector to the multi-failure mechanism resilience critical boundary model library, calculating the resilience margin of each mechanism component, and obtaining the comprehensive resilience margin and the current candidate dominant failure mechanism based on the resilience margins of each mechanism component; determining the current warning level and the final dominant failure mechanism based on the resilience margins of the mechanism components and the comprehensive resilience margin, combined with set warning conditions; and outputting warning information and linkage control commands corresponding to the current warning level and the final dominant failure mechanism. Compared with existing technologies, this invention has advantages such as strong interpretability, high lead time, good stability, and strong linkage targeting.

The application provides a track vehicle running part service performance quantitative evaluation method considering life distribution, and belongs to the technical field of track vehicle state evaluation and reliability engineering, and the method comprises the following steps: classifying components according to component failure mechanism; selecting corresponding life distribution models for different categories of components to obtain component time-varying reliability and failure probability; constructing a hierarchical Bayesian network consistent with the running part structure, and combining a variable elimination algorithm to calculate the posterior failure probability of each layer node; based on the component time-varying reliability, the posterior failure probability and the multi-source state monitoring quantity, a component health index with unified dimensions is constructed; the system service performance index is obtained by fusing the component health indexes from bottom to top, and a grading standard is set. The application solves the problems in the prior art, such as the difficulty in realizing unified evaluation of service performance between component and system levels, the insufficient adaptability of life models under different failure mechanisms and the difficulty in quantitative fusion of multi-source state quantities.

The invention provides a device for a composite material stringer skin interface out-of-plane soft body impact test, and relates to the technical field of impact tests, the device for the composite material stringer skin interface out-of-plane soft body impact test comprises an impact loading assembly, a fixed supporting assembly and a clamping assembly; the number of the clamping assemblies is two, and the two clamping assemblies are arranged on the fixed supporting assembly in the first direction in a spaced mode. The clamping assembly comprises a base, a rotating shaft, a lever, a spring and a clamping piece; the base is connected with the fixed supporting assembly. The rotating shaft is rotationally connected with the base and can rotate around the axis of the rotating shaft; one end of the lever sleeves the rotating shaft, and a spring is arranged between the other end of the lever and the base; the clamping piece is detachably connected with the rotating shaft so as to cooperatively clamp a test piece; the impact loading assembly is arranged above the clamping assembly, and the impact loading assembly can apply an out-of-plane impact load to the test piece. The out-of-plane impact loading test of a composite material stringer skin test piece can be realized, and the failure mechanism of a stringer skin interface in the process that a composite material fuselage bears an out-of-plane impact load is studied.

The utility model discloses a kind of adjustable gap nanometer crushing devices, it relates to nanometer crushing device technical field, to solve the problem that traditional design excessively relies on mechanical strength promotion, ignores material failure mechanism and energy transmission efficiency optimization under multi-physical field coupling, needs to realize systematic breakthrough by structural innovation, material upgrading and thermal coupling design, its technical scheme main point is including power mechanism, the power mechanism one end fixedly connected with valve body, the valve body and power mechanism inside swing connection have for collision firing pin, the valve body inside is provided with the buffer structure for the buffer of firing pin, the valve body away from power mechanism one side fixedly connected with collision head, the collision head upper end fixedly connected with fixed joint. Under the premise of guaranteeing high-pressure sealing property, the reliability of easy maintainability and long-period operation is considered, and a new technical path is provided for the core component design of high-pressure homogenization valve and other equipment.

The invention discloses a cyclic load and electrochemistry collaborative testing device and a testing method, and belongs to the technical field of material corrosion and mechanical property testing. The device comprises a load applying unit, an electrochemical testing unit, a sample clamp and corrosion pool unit and a data synchronization control module. The test method comprises the steps of sample preparation, device assembly, static electrochemical test and electrochemical collaborative test under cyclic load. The core of the invention lies in that through the data synchronization control module, the electrochemical test is accurately controlled to be triggered when the cyclic load reaches a peak value, and in-situ and synchronous coupling of a dynamic stress field and a corrosion environment is realized. According to the method, the defect that fatigue and corrosion tests are separated in the prior art is overcome, the complex working condition of the material in actual service can be truly reduced, the acceleration or inhibition effect of cyclic stress on the surface corrosion behavior of the material is accurately represented, and the research and evaluation precision of the corrosion fatigue performance and failure mechanism of the material is remarkably improved.

The invention discloses an engine elastic support residual life prediction method based on a random forest model, and belongs to the technical field of mechanical part life prediction. The method comprises the following steps: collecting vibration acceleration and displacement signals of the elastic support in the whole life cycle through a vibration test bench; selecting characteristic parameters including an effective value, an inherent frequency, a damping ratio and dynamic stiffness based on a failure mechanism; key features are screened through principal component analysis and Pearson correlation coefficients; a random forest regression model is constructed, and the model precision is improved in combination with parameter optimization and cross validation; and finally, inputting the screened characteristic parameters, and outputting a residual life prediction value. The method realizes accurate prediction of the residual life of the rubber-metal composite elastic support member, has the advantages of strong anti-noise capability, good generalization performance and comprehensive evaluation indexes, and is suitable for state monitoring and preventive maintenance in engineering practice.

The invention discloses a tension-torsion multi-axial fatigue experiment device and method based on synchrotron radiation and neutrons. The experimental device comprises a base, a lower cavity, an acrylic / aluminum alloy projection window, an upper cavity, a supporting rod, a supporting plate, a hydraulic actuator, an upper connecting rod, a load sensor, an upper clamp, a multi-axial fatigue sample, a lower clamp, an angle sensor, a lower connecting rod, a torsion servo motor, a motor controller, an advanced light source receiver, an advanced light source entrance slit and the like. And performing macroscopic three-dimensional damage distribution characterization and microstructure evolution and damage evolution process experiments in the sample by penetrating the metal sample through X-rays and neutron beams. The method provides direct and reliable experimental data support for establishing a multi-axial fatigue theoretical model, revealing a material failure mechanism and engineering structure anti-fatigue design.

The application provides a turbine blade thermal barrier coating force-thermal coupling reliability evaluation method, which comprises the following steps: measuring and constructing a density distribution function of a thermal barrier coating microstructure and thermodynamic parameters, completing macroscopic complex turbine blade thermal barrier coating temperature field and strain field simulation, constructing a Monte Carlo sample space of random parameters at different positions of the blade, establishing a micro-scale force-thermal coupling finite element model and obtaining a life data set, building and training a deep learning agent model, and completing turbine blade thermal barrier coating reliability evaluation and sensitivity analysis. The reliability evaluation method provided by the application comprehensively considers the influence of the thermal barrier coating microstructure factor and the force-thermal coupling failure mechanism, solves the problems of high dimension, high nonlinear calculation cost and the like in the reliability evaluation of the complex blade thermal barrier coating, improves the accuracy and efficiency of the reliability evaluation, and provides an evaluation means for the safe application and optimized design of the thermal barrier coating.