31 results about "Static stress" patented technology

The invention provides a deep coal seam roadway surrounding rock stability intelligent early warning method, and relates to the technical field of coal mine dynamic disaster prevention and control. According to the intelligent early warning method for the stability of the surrounding rock of the deep coal seam roadway, a basic sample library is constructed through a dynamic and static combined loading rock test; synchronously collecting field surrounding rock static stress and micro-seismic data and carrying out time sequence polymerization; constructing an equivalent dynamic and static combined stress index based on a dynamic and static load superposition principle, and forming a seismic-force coupling feature vector; establishing an LSTM early warning model, adopting a transfer learning strategy, pre-training by using laboratory data, and then performing fine tuning by using field data; inputting the real-time feature vector into a model and outputting an instability probability; and verifying and correcting the probability based on actual deformation data of the surrounding rock, and applying a missing report sample to online incremental updating of the model. According to the method, the dynamic and static load coupling effect is quantified, the difficulty of small sample training is overcome, and accurate and self-adaptive early warning of the deep roadway surrounding rock instability risk is realized through a physical feedback closed-loop correction mechanism.

This invention relates to the field of blade crown structure technology and discloses a method for designing the oblique cut angle of crowned blades. By defining the direction and magnitude of the oblique cut angle of the crowned blade and defining evaluation parameters for the rationality of the static design of the crowned blade, simulation models of crowned blades with different sizes and directions of oblique cut angles on the crown contact surface are constructed. Static analysis is performed on the simulation models, and the oblique cut angle and magnitude of the contact surface are determined based on the static evaluation parameters. This invention solves the problems of excessive static stress in the blade due to pre-twist during assembly of crowned blades and crown misalignment due to rubbing. In particular, it addresses the following issues: for short blades with crowns and small aspect ratios and large torsional stiffness, even a small pre-twist angle design can still result in excessive stress. Reducing the pre-twist angle makes it difficult to ensure that the pre-twist angle tolerance meets requirements during processing and assembly. Using traditional improvement methods requires significant modifications to the blade, limiting engineering applications and affecting other blade performance.

The invention relates to the field of blade damping design, in particular to a blade root collision damping design method. Performing finite element analysis on the blade structure, and determining a non-bearing surface area of the blade root of the blade; performing finite element analysis on the wheel disc structure to determine a non-bearing surface area of the wheel disc; according to the non-bearing surface area of the blade root or the non-bearing surface area of the wheel disc, a damping groove position structure is designed; according to the position structure of the damping groove, the appearance and the placement mode of the collision damping body are designed, and it is ensured that the collision damping body has a collision gap in the damping groove; the blade-wheel disc containing the damping grooves and the collision damping bodies is assembled, and an assembly body is obtained; according to the method, static stress and modal analysis is conducted on the blades and the wheel disc, the non-bearing surface area is recognized, it is guaranteed that the structural strength of the blades is not affected by forming of the damping grooves, interference on the blades is further reduced, and the integrity and fatigue life of the blades are guaranteed.

This invention provides a method and system for predicting the long-term strength of hard rock under the influence of dynamic disturbance frequency in true triaxial tests, relating to the field of deep engineering safety evaluation technology. The method includes: acquiring dynamic disturbance parameters, rock compression process data, and fracture morphology data from long-term dynamic disturbance true triaxial tests; constructing characteristic curves based on the rock compression process data; performing equivalent static mapping based on the dynamic disturbance parameters and characteristic curves to obtain the equivalent static stress state under the limiting frequency condition; fitting the equivalent static stress state to obtain the predicted long-term strength value under the equivalent static condition; constructing a model based on the characteristic curves and fracture morphology data to obtain a multi-dimensional criterion score; and judging and correcting the predicted long-term strength value based on the multi-dimensional criterion score to obtain the output result. This invention achieves quantitative characterization and accurate prediction of the long-term strength under true triaxial conditions for the influence of high-frequency, long-term dynamic disturbances.

The invention discloses a construction method and device for a spindle box of a horizontal machining center, and relates to the technical field of horizontal machining centers. Static stress and inherent frequency of a saddle structure are determined according to stress analysis of a first dangerous point position; the primary optimization model of the spindle box is determined based on the static stress and the inherent frequency of the saddle structure and the additionally arranged guide rail mounting surface, and the accuracy of the primary optimization model of the spindle box is improved. Therefore, a quadratic optimization model of the spindle box is determined based on the first dangerous point position, the second dangerous point position and the strain data of the guide rail mounting surface; determining each damage event based on impact simulation of the secondary optimization model of the spindle box; determining an optimization report based on each destruction event and the corresponding destruction data; and the final model of the spindle box of the horizontal machining center is constructed based on the optimization report, the secondary optimization model of the spindle box and the corresponding form, so that the accuracy of the final model of the spindle box of the horizontal machining center is improved.

This invention relates to the field of vehicle technology and discloses a method, apparatus, device, and storage medium for determining the CAE performance of a sleeper structure. The method includes: acquiring damage parameters of the sleeper structure located inside the vehicle; determining CAE performance analysis materials based on the damage parameters of the sleeper structure; setting static stress-stiffness analysis conditions for the upper and lower sleepers based on the damage parameters of the sleeper structure; and analyzing the CAE performance of the sleeper structure based on the static stress-stiffness analysis conditions for the upper and lower sleepers. By determining the CAE performance analysis materials based on the damage parameters of the sleeper structure located inside the vehicle, and then performing analyses on the set static stress-stiffness analysis conditions for the upper and lower sleepers respectively, the accuracy of analyzing the CAE performance of the sleeper structure can be effectively improved, and the development cycle and cost can be reduced.

The invention discloses a coal mine adjacent goaf roadway surrounding rock load determination and impact instability judgment method, which comprises the following steps: establishing an adjacent goaf working face initial pressure and full mining stage working face roof structure model, an adjacent goaf working face initial pressure and full mining stage working face roof three-dimensional model and adjacent goaf roadway three-load superposition schematic; the adjacent goaf roadway surrounding rock load-bearing characteristics and the roof fracture load transfer rule of the adjacent goaf working face at different mining stages are analyzed; a method for calculating lateral static load stress of an adjacent goaf, advanced static load stress of the adjacent goaf and fracture dynamic load of an overlying thick and hard rock stratum borne by surrounding rock of the adjacent goaf roadway in different mining stages of the adjacent goaf working face is provided, and the load bearing state of the surrounding rock of the adjacent goaf roadway is quantitatively represented; according to the method, the adjacent goaf surrounding rock impact instability criterion is provided, the adjacent goaf surrounding rock stability is theoretically analyzed, the adjacent goaf rock burst prevention and control thought and method are analyzed based on the impact instability criterion, and the method has important theoretical and practical significance on adjacent goaf rock burst prevention and control.

The invention provides an ore body static stress characterization and blasting method, and belongs to the technical field of mine engineering blasting. The method comprises the following steps: testing ground stress distribution characteristics of a stope ore body by adopting a hydraulic fracturing method, and obtaining horizontal maximum principal stress, horizontal minimum principal stress and vertical stress of a plurality of measuring points in the stope ore body; establishing a three-dimensional finite element model of the stope ore body, and applying the average horizontal maximum principal stress, the average horizontal minimum principal stress and the average vertical stress of a plurality of measuring points in the stope ore body to the model for solving; calculating a static stress influence coefficient according to the solving result; dividing static stress influence degree grades according to the values of the static stress influence coefficients, and generating a static stress influence coefficient cloud picture; and determining blasting parameters of the stope ore body according to the static stress influence coefficient cloud picture and the static stress influence degree grade. According to the internal stress level and the stress difference degree of the ore body, the static stress influence coefficient is calculated for blasting parameter design, and the blasting efficiency and safety are improved.

The application discloses a dynamic-static coupling observation system based on a double-mode stress response and a data processing method, platform and storage medium thereof; a double-mode test piece is constructed by combining a transparent photoelastic matrix and a force-induced luminescence sensing layer, and strict time-sharing gate control of dynamic loading and delayed phosphorescence acquisition is realized by means of a time sequence controller, so that transient stress wave observation and static stress memory are integrated in the same system; not only the ability of a traditional photoelastic instrument to record the whole process of stress wave propagation in real time is retained, but also the fundamental limitation that the traditional photoelastic instrument cannot identify a plastic zone is broken through, and full-field quantitative distinction of an elastic zone, a plastic zone and a rupture zone is realized. Meanwhile, the phosphorescence lifetime which is not sensitive to interference is used as a main parameter to inverse stress peak value, a reliability evaluation system based on stripe quality, fitting residual error and registration error is established, and the robustness and reliability of measurement results are improved, so that an advanced observation method with complete information, high precision and mutual verification is provided for explosion mechanics and material impact damage research.

The invention relates to the technical field of rock mechanics testing, and discloses a dynamic and static combined loading rock critical energy consumption density testing method. The method comprises the following steps: preparing and screening a rock test piece, fixing the rock test piece between an incident bar and a transmission bar of the split Hopkinson pressure bar system, and ensuring that the incident bar and the transmission bar are coaxial; applying confining pressure and axial pressure to the test piece to enable the test piece to be in a preset three-dimensional static stress state; starting the system, setting initial impact air pressure to impact the test piece, and collecting a strain signal; determining a critical impact air pressure and a corresponding critical strain signal which enable the test piece to reach a set damage state; and crushing energy consumption is calculated based on the critical strain signal, and critical energy consumption density is obtained through conversion. The method fits the actual stress scene of the rock, improves the accuracy and reliability of the test, and can provide technical support for the design and construction of underground engineering.

This application relates to the field of fatigue life prediction technology, specifically to a method and system for predicting the fatigue life of automotive seat hardware molds. The method includes: obtaining the fillet radius, sheet thickness, and load spectrum; thereby obtaining the fillet radius and sheet thickness for a batch; obtaining the static stress concentration factor based on stress analysis, and adjusting it using the fillet radius and sheet thickness to obtain the dynamic stress concentration factor; obtaining the actual equivalent stress by weighting the collected nominal stress and residual stress using the dynamic stress concentration factor; further obtaining the strain amplitude; obtaining the material fixation characteristics of the mold material, and constructing an equation using the stress characteristics, material fixation characteristics, and strain amplitude to obtain the cycle life; determining the damage value based on the cycle life to obtain the remaining fatigue life. This application improves the accuracy of fatigue life prediction.

The invention provides an anti-seismic evaluation method and device for a sluice gate of a nuclear power plant, electronic equipment and a storage medium. The anti-seismic evaluation method comprises the steps of obtaining gate structure parameters, pool geometric parameters and seismic oscillation parameters of a target sluice gate; according to the geometric parameters and the seismic oscillation parameters of the pool, calculating vertical dynamic water pressure, horizontal dynamic water pressure and liquid oscillation pressure acting on the target sluice gate; calculating the dynamic water load stress of the dynamic water load according to the vertical dynamic water pressure, the horizontal dynamic water pressure and the liquid oscillation pressure; calculating the structure inertia stress of the target sluice gate based on the water body additional mass, the gate structure parameters and the seismic oscillation parameters; the static stress of the target sluice gate under the static load is calculated according to the sluice gate structure parameters and the pool geometric parameters; calculating the target total stress of the target sluice gate according to the dynamic water load stress, the structural inertia stress and the static stress; and carrying out anti-seismic evaluation on the target sluice gate according to the target total stress. According to the invention, the calculation efficiency and accuracy of anti-seismic evaluation can be improved.

The application relates to the technical field of finite element analysis, in particular to an elevator load-bearing performance analysis method, system and equipment based on finite elements, which comprises the following steps: collecting vibration frequency, deformation displacement and total weight of a car in real time during elevator operation; analyzing vibration frequency correlation and weight fluctuation characteristics during a load interaction period from door opening to door closing, obtaining a first resonance characteristic value; analyzing weight mutation degree and deformation displacement recovery difference during the period, obtaining a second resonance characteristic value; and fusing the two characteristic values to generate a correction factor to adaptively correct the static stress of a finite element model of a load-bearing beam. The application solves the problem that existing finite element static analysis cannot capture the stress calculation deviation caused by mine elevator resonance and heavy load impact, and improves the accuracy of elevator load-bearing performance analysis.

The invention discloses a pipeline stress on-line detection method, belongs to the technical field of pipeline detection, and relates to a full-link technical scheme of'detection target-stress type-characteristic data-special model 'which is reversely constructed from'multivariate detection target' (such as fatigue life evaluation, defect safety monitoring and sudden impact early warning) of pipeline safety operation. According to the method, multiple most suitable detection technologies are intelligently selected and fused, multi-physics sensing technologies such as optics (FBG), acoustics (ultrasound) and vibration (acceleration) are fused, and static stress, local peak stress and dynamic alternating stress can be synchronously captured for a composite target; according to the invention, targeted, differentiated and collaborative online monitoring of stress states of different stress types and different risk parts is realized, the inherent defects of single sensing dimension and existence of a monitoring blind area of a single technology (such as only magnetism or only vibration) are effectively overcome, and the refinement and intelligence level of pipeline safety management is improved.

The application discloses a sealing performance evaluation method and device of a sealing structure, and relates to the technical field of liquid rocket engine research, to solve the problem of poor sealing performance evaluation accuracy of the sealing structure in the prior art. The method comprises the following steps: obtaining static stress load data of a target sealing flange structure in a target liquid rocket engine; based on the static stress load data, determining wear parameters between a soft plating layer and a flange contact surface in the target sealing flange structure by using a soft plating layer friction and wear analysis model; the soft plating layer friction and wear analysis model is an analysis model obtained after at least grid ALE self-adaptation and setting of a grid node motion control mode are performed on a grid corresponding to the soft plating layer of the target sealing flange structure in a two-dimensional axisymmetric finite element model; and based on the wear parameters, evaluating the sealing performance of the target sealing flange structure; thereby the accuracy of evaluating the sealing performance of the sealing structure is improved.

The utility model discloses an indoor simulation device for pipeline deformation under active instability of a self-balancing shield excavation face. The indoor simulation device comprises a test module and a monitoring module. The uncovered test box body is made of a transparent organic acrylic glass plate, and a round hole and a square hole are formed in the front face of the model box and used for fixing a model tunnel and shield tunneling. And the shield tunneling device is provided with a connecting screw rod, a hexagon nut is screwed into one side of the connecting screw rod, and active instability of the tunnel excavation face is controlled by rotating the hexagon nut. A reaction frame is arranged on the front side of the test box body, one side of the reaction frame makes contact with the threaded rod, and reaction force is generated and provided for the piston rod to drive the supporting plate to retreat. And the monitoring module comprises a strain gauge, a settlement rod, a dial indicator, a thin film pressure sensor, a control circuit board, a static stress-strain test analysis system and a real-time monitoring computer. The device has the advantages of simple structure, convenience in installation, capability of reducing the workload of experimenters, capability of improving the test efficiency, real and reliable experimental data, real-time monitoring and the like.

The embodiment of the invention provides a strength analysis method and device for a pipeline system of a carrier rocket, and the method comprises the steps: calculating the static load response of the pipeline system, obtaining a static load analysis result, and judging whether the static load analysis result meets a preset static load strength condition or not; the dynamic load response of the pipeline system is calculated, the maximum dynamic stress is obtained, the maximum static stress is used for correcting the maximum dynamic stress, the corrected maximum dynamic stress is obtained, and whether the corrected maximum dynamic stress meets the preset dynamic load strength condition or not is judged; when it is determined that at least one of the preset static load strength condition and the preset dynamic load strength condition is not met, the pipeline system is optimized, the corrected maximum dynamic stress is closer to a true value in a maximum stress correction mode, the corrected maximum dynamic stress is closer to the true condition as a basis for dynamic load strength analysis, and the dynamic load strength analysis accuracy is improved. Deviation caused by analysis purely based on the maximum dynamic stress is avoided, judgment conditions are preset in the static load aspect and the dynamic load aspect, and therefore the judgment result better meets the actual requirement.

The invention provides a real-time monitoring method and device for amorphous characteristics of an airborne system under a dynamic load, and belongs to the technical field of structural health monitoring. The device is used for monitoring crystallization transformation caused by flight load of an amorphous alloy test piece through a controllable stress-corrosion simulation electrolysis system after off-site sampling of the amorphous alloy test piece subjected to dynamic load in an airborne environment. The device adopts a single-cavity structure; a sample serves as one side wall of a cavity to form a wall type working electrode, and the back surface is sealed and supported by a solid back plate, a flange and an O-shaped ring; a reference electrode, a counter electrode, a thermocouple and a magnetic stirrer are arranged in the cavity. By adjusting temperature, solution components and external static stress, an airborne environment can be simulated, and high-precision measurement of corrosion current, interface resistance and electrochemical noise of a test piece is realized, so that the stability of an amorphous structure and the degradation degree of corrosion resistance of the amorphous structure after dynamic loading of an airborne system are judged. According to the scheme, operation is easy and convenient, the structure is compact, repeatability is good, and rapid off-position evaluation and airborne component quality tracing are facilitated.

This invention relates to the field of bridge structural health monitoring and safety assessment technology, and particularly to a method for detecting the deflection deformation of orthotropic steel bridge decks based on influence surfaces. The method includes: S1, establishing a layered spatiotemporal traffic flow information database specific to the orthotropic steel bridge deck to be tested, generating virtual loads based on time windows and vehicle tail reinforcement coefficients to simulate bridge traffic; S2, acquiring the static stress response of key bridge points when vehicles cross the bridge; S3, inverting the influence surface based on dimensional adaptive prior information, constructing a hybrid likelihood function, and reconstructing a two-dimensional influence surface matrix by integrating typical traffic and tail reinforcement information; S4, comparing the changes and responses before and after the influence surface to infer the deflection deformation. This application can generate virtual loads using traffic flow statistics and invert the entire field influence surface through stress measurement at a single key point; the innovative dimensional adaptive prior setting method significantly improves the inversion efficiency, accuracy, and stability.

The invention provides a non-hydrophilic similar simulation test system and a similar simulation test method. The test system comprises a two-dimensional model test bed, a loading device, a first water pressure supply device, a non-hydrophilic similar model and a detection system, the non-hydrophilic similar model is made of a non-hydrophilic similar material; the loading system comprises a paradigm frame and a loading oil cylinder mounted on the counter-force frame; the first water pressure supply device comprises a plurality of bags and an air supply device for supplying air to the bags; the detection system comprises a high-speed camera arranged right opposite to the non-hydrophilic similar model, a plurality of pressure sensors and a static stress-strain test analysis system used for analyzing data of the pressure sensors. The test system reduces test interference and guarantees the repeatability of the test. According to the method, the test system is adopted for simulation, and the complete process of working face advancing can be completely simulated.

The invention relates to the technical field of high-strength steel detection, in particular to a stress-attenuation-based method for testing the fracture limit hydrogen content of a high-strength steel material for an automobile, which comprises the following steps of: obtaining the static stress attenuation of the material by adopting a slow strain rate testing method, and obtaining the hydrogen content after fracture by utilizing a thermal desorption analysis method. And obtaining the fracture limit hydrogen content of the material according to the relationship between the hydrogen content and the fracture stress. The method has the beneficial effects that the fracture limit hydrogen content can serve as a hydrogen content threshold value for safe use of the material, the hydrogen concentration in the material or in the environment is controlled to be lower than the critical value, the hydrogen-induced delayed fracture risk can be remarkably reduced, the hydrogen-induced delayed fracture risk can be effectively reduced, and safer application of ultrahigh-strength steel in the lightweight field is promoted.

The invention relates to the technical field of safe and efficient mining of coal mines, and discloses a static fracturing and hydraulic fracturing synergy-based hard coal weakening method, which comprises the following steps of: determining a drill hole arrangement mode and a quantity ratio; drilling holes are constructed according to a preset interval meeting the physical penetration requirement, and track control is carried out; the constructed packaging type static expansion device is arranged in the static fracturing drill hole and sealed; water is injected into the hydraulic fracturing drill hole to generate a water guide crack, and communication characteristics are monitored; after confirmation of cut-through, an expansion device is activated through crack water flow, and generated radial expansion stress and a hydraulic fracturing stress field are superposed to form a synergistic weakening effect; and determining coal body parameters to evaluate the weakening degree. The static fracturing units are communicated and activated through the hydraulic fractures, the fractures are supported through static stress to prevent closing, meanwhile, composite stress is overlaid at the tip ends of the fractures to induce secondary fractures, the problems that single hydraulic fracturing fractures are prone to closing, and static fracturing deep crack initiation is difficult are solved, and efficient volume breaking of hard coal is achieved.

The application discloses a kind of reverse deformation processing methods of CNC gantry milling machine beam offset guide rail, comprising the following steps: step one, 3D modeling of CNC gantry milling machine: using 3D design software, the mechanical structure of CNC gantry milling machine is simulated modeling;Step two, finite element static stress analysis is carried out to the beam of CNC gantry milling machine;The application utilizes new technology of finite element simulation, simulates and predicts the deformation of CNC gantry milling machine beam after stress, decomposes space deformation into two planes of vertical and horizontal, then utilizes high-precision CNC gantry milling machine or high-precision CNC gantry grinding machine, and carries out reverse deformation processing to beam guide rail surface, finally obtains the high precision of CNC gantry milling machine;The application predicts beam deformation, and carries out targeted reverse deformation by processing, and finally greatly improves the assembly efficiency and precision of CNC gantry milling machine.

The application provides a kind of ore body static stress characterization and blasting method, belong to the technical field of mine engineering blasting.The method includes: using hydraulic fracturing method to test the stress distribution characteristics of stope ore body, obtain the horizontal maximum principal stress, horizontal minimum principal stress and vertical stress of multiple measuring points in stope ore body;Establish a three-dimensional finite element model of stope ore body, apply the average horizontal maximum principal stress, average horizontal minimum principal stress and average vertical stress of multiple measuring points in stope ore body to the model for solving;Calculate the static stress influence coefficient according to the solving result;According to the value of static stress influence coefficient, the static stress influence degree grade is divided, and the static stress influence coefficient cloud chart is generated;According to the static stress influence coefficient cloud chart and the static stress influence degree grade, the blasting parameters of stope ore body are determined.The method calculates the static stress influence coefficient according to the stress level and stress difference degree in the ore body, which is used for blasting parameter design, and improves the blasting efficiency and safety.

This invention provides a method and design for the alignment of high-speed maglev turnouts, including determining the angle constraint between adjacent turnout beams based on the geometric relationship constraints of the track; constructing a straight-line approximation curve design using the standard stator unit length as a constraint; constructing a curve-to-straight-broken-line alignment design using circular curve segments; verifying the parameters of the designed transition curve and circular curve using at least the angle constraint between adjacent turnout beams; solving all parameters of the transition-circular-broken-line turnout alignment after verification; verifying the mechanical performance of the turnout alignment using static stress-deformation, dynamic analysis models, and modal analysis models; and selecting the optimal alignment parameters for the optimal turnout alignment while meeting the mechanical performance requirements. This invention solves the problem that existing turnout alignments are insufficient to meet the needs of practical engineering for turnouts with different levels of lateral passing speed.

The invention relates to a pump impeller fatigue analysis method and device, a storage medium and electronic equipment, in particular to the technical field of oil-submerged pumps, and the method comprises the steps that impeller structure data and impeller operation environment data of an impeller of an oil-submerged pump are obtained, and the impeller operation environment data comprise oil medium data; static stress analysis and harmonic response analysis are conducted on the impeller according to the impeller structure data and the impeller operation environment data, the average stress and stress amplitude of the impeller are obtained, fatigue analysis points corresponding to the impeller are determined, and the fatigue analysis points at least comprise the maximum static stress point of the impeller and the maximum dynamic stress point of the impeller; drawing a fatigue strength graph of the impeller according to the average stress and the stress amplitude of the impeller, and determining a safety coefficient corresponding to the fatigue analysis point based on the fatigue strength graph; and checking the fatigue strength of the impeller according to the safety coefficient, and generating a fatigue analysis result of the impeller running in the oil medium. According to the invention, the operation safety analysis of the impeller in the oil medium can be realized.

The application discloses a kind of helicopter equipment mounting bracket strength design method considering vibration environment, according to the equipment installation area on helicopter, determine the main excitation frequency and the maximum amplitude of vibration that equipment support is expected to withstand;Vibration load under the corresponding maximum amplitude is loaded to the center of gravity of equipment, the maximum static stress of equipment mounting bracket is calculated using finite element method, and then the equivalent dynamic stress of equipment mounting bracket under the vibration environment of helicopter is obtained;Obtain the total cycle number of fatigue by comparing the S-N curve of material, and the simplified high-cycle fatigue life of equipment mounting bracket is obtained according to frequency calculation.The application can make equipment mounting bracket better adapt to the vibration environment of helicopter, and avoid structural cracks.

The invention belongs to the field of stress corrosion of metal materials in a medium / high-temperature environment, and particularly relates to an experimental device for coupling a dynamic / static stress state in a medium / high-temperature salt-containing water steam corrosion environment. A sample is clamped in the center of the semi-closed corrosion environment cavity through the extension clamp, the extension clamp is connected to the dynamic / static stress loading system, a corrosion environment field is applied to the periphery of the clamped sample, and the sample, the extension clamp and the steam corrosion environment cavity are in a coaxial relationship; the dynamic / static stress loading system is provided with a displacement monitoring and load monitoring device and is connected with the electronic detection and control system; the semi-closed corrosion environment cavity is sequentially connected with the salt-containing water steam generating system, the gas path system of the carrier gas and the protective gas and the liquid discharging pipe through the atomization spray head connector, the gas path connector and the one-way communicated liquid discharging pipe opening. According to the invention, research on the heat-salt-stress coupling failure mechanism of the material in the dynamic / static stress load coupling medium / high-temperature salt-containing steam corrosion environment is realized.

The application provides a kind of aero-engine titanium alloy hollow fan blade strength evaluation method, comprising: making hollow fan blade and solid fan blade have the same blade shape, according to the mass of solid fan blade cover and hollow fan blade mass, the mass center circumferential coordinate of the hollow fan blade when the hollow fan blade has reasonable cover is calculated, and the hollow fan blade structure is obtained;The static stress and vibration stress distribution of hollow fan blade is obtained by static strength and vibration characteristic analysis, whether the maximum point position of static stress and vibration stress distribution meets the requirements is judged, if it does not meet the requirements, then adjust the structure parameters of hollow fan blade;Determine the cross-section strength checking position of hollow fan blade, according to stress amplitude-average stress life curve, the relationship between solid fan blade strength and hollow fan blade strength is established, based on the static strength reserve standard of solid fan blade is not lower than the checking strength of solid fan blade, the strength of hollow fan blade hollow welding area is obtained.

The invention relates to the technical field of offshore piles, and discloses a method, a device, equipment, a medium and a product for analyzing the response of a pile foundation under a vertical load. The method comprises the following steps: acquiring parameter values of undrained shear strength and initial shear modulus of a soil layer of a target site and a static stress-total strain curve; determining a first incidence relation among the static stress, the plastic strain and the total strain in the soil layer of the target site; determining a third incidence relation between the static stress and the elastic strain according to a second incidence relation among the total strain, the elastic strain and the plastic strain and the first incidence relation; and determining a t-z model curve according to a fourth incidence relation between the static stress and the frictional resistance, a fifth incidence relation between the pile body settlement and the plastic strain and the third incidence relation between the pile body settlement and the elastic strain. And substituting into the finite element model to carry out response analysis on the pile foundation under the vertical load.