879 results about "Shear stress" patented technology

Disclosed are a dynamic disturbance-induced rock burst test device and a test method. The test device comprise a supporting platform, a plurality of loading plates, an electromagnetic pulse emitting system, an acoustic emission monitoring system, a high-speed camera, an electromagnetic radiation detecting system and a confining pressure servo control loading system. The plurality of loading plates are arranged on a side wall of a coal rock sample and are placed inside a square chest, the electromagnetic pulse emitting system and the confining pressure servo control loading system are arranged inside a bar system, and an acoustic emission probe is arranged inside the loading plate. A three-dimensional real stress environment of the coal rock is simulated by simulating a shear stress through friction between the loading plate and the sample, as well as dynamic and static combined loading of multi-axial and multi-directional static confining pressure and stress wave disturbance.

The invention discloses an appearance visual detection method and device for an electric control part of a new energy automobile. Structural stress distribution data of the electric control component are obtained and subjected to partition processing, and the surface of the electric control component is divided into a stress sensitive area and a conventional area; carrying out multi-wavelength spectrum scanning and polarization state detection on the stress sensitive area by adopting self-adaptive path planning, synchronously acquiring a polarization characteristic matrix, dual-wavelength interference data and depth spectrum data of the determined key attention area, and carrying out time domain synchronization and space registration processing to generate multi-dimensional detection characteristic data; extracting an optical anisotropy coefficient, a microcosmic deformation tensor and an interface reflection feature vector, and determining layering defect feature parameters in combination with multiple threshold judgment; and calculating local curvature distribution, an interface shear stress field and thermal stress distribution, and performing quantitative matching with the material characteristic parameters to generate quantitative evaluation indexes of the layering defects. According to the invention, accurate identification and rapid positioning of microscopic layering defects in the multi-layer composite insulation structure of the electric control component are realized.

The invention relates to the field of tunnel engineering geology and support design, and discloses a weak surrounding rock tunnel deformation risk discrimination method based on shear expansion-shear constitutive, which comprises the following steps: constructing a nonlinear coupling model between a shear expansion angle and shear stress, normal stress and joint parameters, and obtaining the shear expansion angle; establishing a volumetric strain rate discrimination formula; inverting an initial crustal stress tensor field; reconstructing an irregular tunnel boundary; constructing a risk level discrimination model, and outputting a risk level; supporting schemes such as supporting rigidity, anchor rod parameters and spraying layer thickness are matched according to the risk grades; establishing a model to predict a risk trend; a support adjustment suggestion is generated; collecting monitoring data to dynamically correct model parameters; and all the modules are integrated in a deployment system. According to the method, the coupling relation between the shear expansion angle and the shear strength is introduced, the coupling type constitutive discrimination model is established, the risk grading system and the support correction strategy associated with the support response are constructed, and active early warning of the high-risk section and dynamic adjustment of the support rigidity are achieved.

The invention relates to the technical field of slope engineering, in particular to a settlement deformation prediction method and system for a reinforced soil slope building structure. The method comprises the following steps: acquiring a soil body infiltration line position parameter of a reinforced soil slope, an interface friction coefficient of a reinforced material and a soil body, a soil body grain grading curve and environment temperature and humidity duration information, and obtaining initial characteristic data of a slope system state; constructing a heat-force-water multi-field coupling monitoring network in the soil-reinforced material interface area according to the initial characteristic data of the slope system state, and obtaining the interface shear stress, the interface normal strain, the pore water pressure gradient and the temperature gradient of each monitoring point to obtain interface action characteristic data. According to the method, the environment disturbance probability density model based on the temperature fluctuation and the sudden change of the water content is constructed, the influence of a complex environment on the slope stability can be quantitatively described, and the robustness of the model is improved.

The invention discloses a bed load particle starting test method and device, and relates to the technical field of hydromechanics, the method comprises the following steps: laying sediment particles in a wave water tank, and adjusting the water flow rate through flow control until the bed surface shear stress is less than the critical shear stress; tracer particles are excited to emit fluorescence through a laser beam, and a camera array is used for synchronously collecting instantaneous flow velocity of a flow field and displacement data of sediment particles; analyzing spatial and temporal distribution characteristics of turbulence energy dissipation and pressure energy dissipation based on a turbulence burst process, and establishing a sediment particle starting mathematical model; experimental data and computational fluid mechanics numerical simulation are combined, and the mathematical model is verified and optimized. According to the technical scheme, the analysis precision and the experimental convergence speed of the sediment starting criterion under the complex hydrodynamic force condition can be remarkably improved, and full-chain efficient cooperation from micromechanical response to macroscopic engineering application is achieved.

The invention discloses a monitoring and early warning system for geotechnical engineering, and relates to the technical field of geological disaster early warning. A monitoring and early warning system for geotechnical engineering comprises a data acquisition module, a data processing module, a model construction module and a disaster early warning module. According to the method, the displacement and the shear stress of the rock-soil body are predicted through the displacement-hydrological-geological coupling prediction model, so that the comprehensive influence of the mechanical state of the rock-soil body and environmental factors on geotechnical engineering disasters can be more comprehensively reflected, and the coupling effect of various monitoring data can be comprehensively considered; therefore, prediction errors and uncertainty caused by data missing or model singleness can be effectively reduced, hydrological data are processed through causal convolution, the long-term dependency relationship among the hydrological data can be effectively captured, the relevance and hysteresis among the water level, the rainfall and the pore water pressure can be reflected, and the prediction accuracy of the hydrological data is improved. Therefore, the accuracy of model prediction can be remarkably improved, and the early warning accuracy of the monitoring and early warning system is also improved.

The invention relates to the technical field of machine learning, in particular to a rock and soil stability prediction method and system based on machine learning, and the method comprises the following steps: extracting shear stress, displacement and energy dissipation rate time series data, calculating the stress change rate of adjacent time steps, screening the stress increment sudden change period, and calculating the shear deformation gradient change rate. Mutation points in the strain direction are screened, and a key variable interval is obtained. According to the method, traditional analysis limitation is broken through by combining displacement-stress second derivative and energy dissipation rate cross validation, a hardening-softening conversion area is dynamically identified, multi-stage strain gradient differences are compared to establish a space-time correlation parameter system, and static and dynamic parameter conversion is realized by using a strain increment space gradient tracking technology; and quantitative mechanical interaction and energy dissipation collaborative analysis is carried out to describe a stress diffusion path, stress release characteristics and deformation gradient distribution are fused to construct a fracture principal direction multi-dimensional verification mechanism, and a microscopic fracture and macroscopic instability correlation model is established.

The invention relates to the field of mechanical fatigue simulation, and discloses a method for simulating and deducing the number of torsion cycles. Comprising the steps that a component three-dimensional parameterized model is constructed, and material fatigue characteristics are defined; applying a periodic torsion load spectrum containing a harmonic component; adopting a stress influence coefficient matrix method to execute quasi-static finite element analysis, and extracting a multi-axis stress state; calculating the maximum alternating shear stress and the average shear stress based on a critical plane recognition technology; converting into a single-axis equivalent stress amplitude through a gradient enhanced multi-axis correction rule; calculating node fatigue damage by combining an S-N curve and a damage accumulation theory; and when the damage reaches a threshold value, outputting a failure cycle number and a position. The innovation points are as follows: the prediction error is controlled within 10% by a critical plane and multi-axis correction technology; a stress matrix method realizes ten thousand times of cycle-level efficient simulation, and the efficiency is improved by 10 times; the risk early warning accuracy rate is improved to 96% by integrating a process correlation defect model; and the research and development period is shortened by 40% through a life cloud picture and an automatic optimization closed loop. The method is suitable for transmission shaft system reliability design.

The invention belongs to the field of prediction of fatigue failure caused by surface defects under rolling contact loads, and particularly relates to a rolling contact fatigue pitting corrosion prediction method considering crystal plasticity, a corresponding computer readable storage medium and electronic equipment. The method comprises the following steps: S1, constructing a crystal plastic constitutive model of a coupling damage accumulation theory; s2, developing the model in the step 1 into a UMAT subprogram by using Fortran, and embedding ABAQUS into the UMAT subprogram; s3, establishing a representative volume element crystal plastic finite element model; s4, applying a periodic boundary condition and a shear load, obtaining a shear stress-strain curve, carrying out a torsional fatigue test, obtaining fatigue damage parameters of the material, and determining constitutive model parameters of the material; s5, establishing a crystal plastic finite element model of the roller and raceway contact pair; s6, applying boundary conditions in two steps; and S7, observing a damage evolution path to the surface, and obtaining the rolling contact fatigue pitting corrosion life. The method can fill the blank of rolling contact fatigue pitting corrosion prediction methods at present.

The invention discloses a non-contact polishing device based on a structured surface polishing tool. The non-contact polishing device comprises a working platform, a workpiece clamping driving assembly and a polishing solution pressurizing assembly are correspondingly arranged on the working platform; the polishing solution pressurizing assembly comprises a structured surface polishing tool correspondingly arranged below the workpiece clamp. The structured surface polishing tool is of a groove-shaped structure, the bottom of the structured surface polishing tool is in a conical surface shape with the outer portion higher than the inner portion, and shifting rods distributed in a radial shape are arranged on the conical surface in groups. During working, polishing liquid in the structured surface polishing tool can be dispersed towards the edge of the polishing tool driving device under the synergistic effect of centrifugal force and the shifting rod, and the pressure of the polishing liquid acting on the surface of a workpiece to be machined is increased. In the machining process, the polishing solution forms a continuous flow field on the surface of the workpiece, then the force rheological polishing solution generates shear stress on the surface of the workpiece to be machined, the material on the surface of the workpiece is evenly removed, the pressure, acting on the surface of the workpiece, of the force rheological polishing solution is improved through the structured surface polishing tool, and the polishing efficiency is improved.

The invention provides a method for regulating and controlling technical parameters in a continuous preparation process of a filling material, and relates to the technical field of mine filling automatic control. According to the method, aiming at the condition that the material level of the stirrer is in a safety interval, pumping pressure-stirrer material level double-rate interval control is adopted, that is, the material level of the stirrer is maintained in a safety range required by a process, and meanwhile, the pumping pressure for conveying a filling material required by underground filling is ensured; after the pumping pressure and the material level of the stirrer are both stable, aiming at the condition that the concentration of the slurry pump is not in a set concentration range, adopting concentration fuzzy PID control, and adjusting the concentration of the slurry pump until the concentration is stable in the set range; aiming at the conditions that the concentration of a slurry pump is in a set concentration range and the frequency of a stirrer is in a normal operation range, torque fuzzy PID control is adopted, the frequency of the stirrer is adjusted, and energy conservation and emission reduction are achieved on the premise that the shear stress of a filling material is stabilized.

The invention belongs to the technical field of direct shear-seepage tests of rock joints, and discloses a numerical test method for direct shear-seepage of rock joints under different boundary conditions, which comprises the following steps of: establishing a joint surface numerical model by using finite element software, and performing tests for simulating joint shear mechanical behaviors by applying different boundary conditions. And the contact state and the opening distribution of the joint surface under different shear displacements are obtained, so that the shear stress evolution mechanism of the joint surface is better revealed, and the mechanical behavior of the rough joint surface in the shear process is accurately expressed. According to the method, the evolution law of mechanical properties in the joint shearing process can be reflected, the influence of shearing deformation on the joint seepage characteristics can be reflected, joint opening data distribution is imported into programming software to be processed, a joint seepage numerical model is constructed, then multi-physics field simulation analysis software is imported, and the joint seepage performance is improved. The flow velocity, the osmotic pressure and the streamline distribution characteristics in the flowing process are calculated, so that the joint permeability characteristics are analyzed.

The invention relates to the technical field of part machining, and discloses a drilling and milling machine tool for precise metal part machining, which comprises a main body, the top of the main body is fixedly connected with a control panel, and the drilling and milling machine tool further comprises an adjusting mechanism, and the adjusting mechanism is arranged on the side wall of the control panel and is used for bearing a workpiece. The square plate drives a workpiece to move downwards and reset during machining, so that the situation that when the drill shaft drills a hole to a large depth, due to continuous contact between a drill bit on the drill shaft and the wall of the deep hole and overlarge shearing force on the side wall of the deep hole during cutting, the drill bit is broken or damaged can be reduced; the horn-shaped cylinder is opened to be matched with the square plate to drive the workpiece to move up and down, so that the continuous shearing process can be interrupted, the shearing stress is dispersed, the tipping condition is reduced, and the subsequent machining efficiency is improved.

The invention discloses a metal fatigue crack initiation simulation method for coupling holes and microstructures, which comprises the following steps of: firstly, establishing a microscopic scale model by collecting microstructure characteristic data and hole distribution data in a metal material, obtaining basic parameters by combining a mechanical property test result, and deducing and calculating microscopic orthotropic parameters; the method comprises the following steps of: scanning internal defects of an alloy, establishing a hole defect model with the same characteristic information according to the scanned internal defects of the alloy, extracting key holes through finite element simulation to establish a geometric model, introducing a stress concentration coefficient, and replacing a shear stress amplitude calculation mode in a Tanaka-Mura dislocation theoretical formula with a stress amplitude calculation mode. And micro-scale numerical simulation of fatigue crack initiation of the metal material with the hole defect is completed. According to the method, factors such as the microstructure and the internal holes of the material are considered, and the finite element simulation technology is combined, so that accurate prediction of the microscale metal fatigue crack initiation life can be realized.

The invention discloses a method for estimating the boundary shear stress of a salt rock single crystal sliding face, belongs to the technical field of geotechnical engineering mechanics and material mechanics, and establishes a frame capable of directly estimating the boundary shear stress of the salt rock single crystal sliding face based on the Hall-Pearch theory. The mapping from the measurable macromechanical parameters to the boundary shear stress of the microcosmic single crystal slippage surface is realized. The method only needs conventional cold pressing preparation, EBSD grain size data and uniaxial compression test results, and does not need to depend on high-cost FIB microcolumn compression or in-situ nanoindentation tests. The method can provide more accurate material mechanical parameters for salt cavern design, creep stability analysis and underground engineering safety evaluation, and has good engineering applicability and wide engineering application prospects.

The invention relates to the technical field of anchoring structure design, in particular to a method for determining the critical anchoring length of an anchor rod based on numerical simulation. Firstly, the critical anchoring length is determined, a short anchor rod pull-out test is conducted on site, a pull-out force and displacement curve of the anchor rod is obtained through the field test, the pull-out displacement curve is converted into the relation between shear stress and shear displacement through a formula, then numerical simulation is conducted, FLAC3D is selected for numerical simulation of the pull-out test, and the tensile strength of the anchor rod is improved. By increasing the nodes of the pile structure units and continuously increasing the drawing length of the anchor rod, a large number of tests do not need to be carried out on site, the influence of site environment and human factors on the determination of the anchoring length of the anchor rod does not need to be considered, manpower and material resources are saved, and the mechanical property of site surrounding rock is not destructed; and engineering can be well adapted.

A method for characterizing thixotropic characteristics of submarine landslide mass material, including: performing steady shear on landslide mass material, and determining solid-fluid transition boundary according to variation of yield stress value in yield stress test; performing conversions between shear speed and shear rate and between shear torque and shear stress according to variations of apparent viscosity-shear speed and shear torque-shear speed of landslide mass material at different shear times in apparent viscosity test to obtain variations of the apparent viscosity and the shear stress at different shear rates to construct conventional rheological model; constructing thixotropy characterization equation according to variations of the shear stress and the apparent viscosity with the shear time in the thixotropy test; and constructing rheological model for characterizing the thixotropic characteristics of the submarine landslide mass material according to the solid-fluid transition boundary, the conventional rheological model, and the thixotropy characterization equation.

The invention discloses a coating impact damage prediction method based on a material genome. The method comprises the following steps: (1) obtaining original data through an impact experiment and related tests; (2) taking the residual stress, the maximum shear stress, the shear stress depth and the porosity of the amorphous coatings with different thicknesses as material gene characteristic data, taking the crack length caused by impact damage as performance data, constructing a corresponding relation database, and obtaining an original data set of a machine learning model; (3) establishing eight machine learning models, and dividing a training set and a test set through 5-fold cross validation; (4) performing grid search on the training set to obtain an optimal hyper-parameter of the model, and further obtaining an optimal machine learning model; (5) evaluating the data in the test set to obtain a machine learning model with the highest accuracy; and (6) predicting impact damage according to the machine learning model with the highest accuracy. According to the method, impact damage prediction is realized based on machine learning, and the precision of performance prediction in coating service performance research is improved.

The invention discloses a small Reynolds number liquid film flow simulation method, which comprises the following steps of: deducing normal stress, shear stress balance conditions and motion boundary conditions on the surface of a liquid film under the action of gravity, airflow shear force and evaporation effect according to a flow physical model; non-dimensionalization and simplification are carried out on the non-slip boundary condition of the wall surface, the mass equation and momentum equation of the flow and the boundary condition of the surface of the liquid film; for small Reynolds number flow, derivation is carried out based on a long wave theory method, and a differential equation of liquid film thickness evolving along with time and space under the synergistic influence of gravity, airflow shear force and evaporation effect is obtained; carrying out weak nonlinear evolution analysis of fluctuation on the differential equation to obtain a change relation of the instability growth rate of the fluctuation along with gravity, airflow shear force and evaporation effect, and giving a change image of the influence of the airflow shear force and the evaporation effect on the instability growth rate of the liquid film fluctuation.

The invention relates to the technical field of material detection, in particular to a solid wood furniture material detection method and system.The method comprises the following steps that form data of a furniture bearing component under the shearing-bending loading condition is obtained, wood connection node imaging is collected, crack displacement is calculated according to a loading sequence, and a fiber bonding point load value is extracted; and calculating the furniture crack growth rate. According to the method, form data is collected through shear-bending loading, crack displacement and fiber bonding point load calculation is achieved, the crack propagation rate is more accurate, the pixel displacement gradient and the maximum shear stress gradient area are combined, the stress concentration point recognition precision is improved, the crack path is tracked based on the local shear stress gradient, and the interlayer energy consumption rate is calculated. Extracting a critical state, identifying a crack instability point, improving damage evolution prediction precision, and improving bending resistance and shearing resistance evaluation comprehensiveness and quality detection reliability in combination with multi-layer stress change and gradient calculation.

The invention discloses a numerical simulation method and device for seepage heat transfer of a three-dimensional rough fractured rock mass, and relates to the technical field of rock mechanics engineering.The dynamic opening degree of the fractured rock mass is obtained by combining the initial opening degree and the equivalent opening degree of the fractured rock mass, and in the process of obtaining the dynamic opening degree of the fractured rock mass, the dynamic opening degree of the fractured rock mass is obtained. According to the method, based on the initial opening and the equivalent opening, the coupling influence of the shear expansion effect and roughness degradation on the fracture opening under the action of shear stress is quantified, and then based on the dynamic opening of the fractured rock mass, the point cloud data of the upper and lower fracture surfaces of the fractured rock mass after shearing is updated; the dynamic updating of the three-dimensional geometrical morphology of the real fracture in the shearing process is realized, and the bidirectional coupling simulation of the seepage field and the temperature field is realized based on the three-dimensional geometrical morphology data of the real fracture, so that the precision of the seepage heat transfer numerical simulation of the fractured rock mass is improved.

The invention relates to a fault stability evaluation method considering a pressure-stress coupling effect. The method comprises the following steps: calculating a pressure-stress coupling ratio according to target layer rock mechanical parameters or field actual measurement pressure and ground stress data; fault three-dimensional structure modeling is carried out based on the seismic interpretation result, and fault occurrence distribution is simulated and calculated; analyzing and calculating the initial stress of the section and the stress after the coupling action by combining the three-way principal stress, wherein the stress comprises shear stress and effective normal stress; a quadratic equation of unary about fault instability critical pressure is constructed, and fault instability risk types are judged in combination with the actual pressure limit of oil field production; and calculating the critical pressure of fault instability under different risk types. According to the method, the influence of the pressure-stress coupling effect on the fault stability can be considered, so that the fault stability evaluation result is more practical.

The invention relates to the technical field of expansion joints, in particular to an anti-corrosion and anti-dust corrugated pipe expansion joint which comprises a corrugated pipe, end pipes, flanges and a pull rod, the two ends of the corrugated pipe are connected with the end pipes, the end pipes are provided with connecting blocks with cambered surfaces, channels connected with the end pipes are formed in the connecting blocks, through openings communicated with the channels are formed in the flanges, and the pull rod is arranged in the through openings. A connecting cavity is formed in the flange, the connecting block is movably connected into the connecting cavity, a rubber ring is arranged on the side, located on the corrugated pipe, of the connecting cavity, the cambered surface is located on one side of the rubber ring, and an adjusting assembly with a push rod is arranged on the flange. The corrugated pipe is changed into a linear shape under the action of self stress through thermal expansion and cold contraction, and the sealing performance of the corrugated pipe expansion joint is ensured when a pipeline starts to convey materials, so that the shearing stress generated by bending of the corrugated pipe due to pipeline deformation is reduced, and the service life of the anticorrosive and dustproof corrugated pipe expansion joint is prolonged.

The invention discloses a structural plane ring shear creep test method under real-time water pressure rise and fall and dry-wet cycle action, which comprises the following steps: S1, applying shear stress step by step to a preset peak strength ratio by adopting a constant normal stress and shear stress graded loading mode; s2, under the working condition of loading each stage of shear stress, performing dry-wet cycle and / or water pressure rising and falling cycle operation synchronously; s3, based on test data, analyzing creep deformation characteristics, long-term strength and failure rules of the structural plane; the device synchronously simulates reservoir water level rising and falling and dry-wet circulation in a ring shear creep test, and can be applied to long-term stability prediction and control measure optimization design of reservoir bank rock slopes and other rock shear tests needing to simulate water pressure change and dry-wet circulation conditions.

The invention relates to a CFD (Computational Fluid Dynamics) method for nearly continuous hypersonic high-temperature thermochemical unbalanced flow numerical simulation, which comprises the following steps of: 1, introducing a Park double-temperature model into an NS equation to describe a thermochemical unbalanced effect at high temperature, and closing a shear stress tensor, a heat flow vector and a mass diffusion flux by adopting an equivalent constitutive model to obtain a closed shear stress model; capturing speed slippage and temperature jump phenomena on the wall surface by adopting corresponding slippage boundary conditions to obtain a macroscopic control equation and boundary conditions suitable for near-continuous hypersonic high-temperature thermochemical non-equilibrium flow; 2, discretely solving the macroscopic control equation and the boundary conditions given in the step 1 by adopting a finite volume method; and step 3, performing post-processing on a solution result obtained in the step 2 to obtain a streaming flow field, a wall surface aerodynamic force and a wall surface heat flow of the calculated appearance.

The invention discloses a method for calculating lateral bearing capacity of a large steel pipe supporting frame structure based on finite element analysis, and relates to the technical field of bearing capacity analysis. The method includes the following steps that geometric parameters and material parameters of the steel pipe supporting frame are collected, and a geometric structure model and a finite element analysis model are established; by applying an initial lateral load, calculating the horizontal slip amount, the shear stress and the local maximum pressure stress of the connecting part to obtain a slip effect contribution index; representing a local buckling effect contribution index in combination with geometrical characteristics and material characteristic parameters; collecting parameters such as environment temperature and wind speed, and calculating an environment effect contribution index; and correcting the initial lateral load by combining the three contribution indexes to obtain an accurate lateral bearing capacity value. According to the method, the slip effect, local buckling and environmental factors are comprehensively considered, the calculation precision and applicability are improved, and a scientific basis is provided for design and safety evaluation of the steel pipe supporting frame.

The invention relates to the technical field of intelligent manufacturing, in particular to a process control optimization method and system based on a metal composite material, and the method comprises the following steps: extracting a crystal grain deviation section based on a path crossing section, judging shear response delay, recognizing a rhythm difference region, dividing a shear strain trend mutation section, and building a boundary layer partition map; and sorting shear stress responses, constructing a slippage thermal orientation chain, and adjusting a loading sequence to obtain a path section structure table. According to the method, the change trend of the included angle between the grain arrangement and the path is analyzed, the grain section deviating from the main direction of the path is extracted, the time difference between the shear response moment and the loading rhythm is combined, the response differentiation area is identified, and the deformation direction turning section is divided according to the trend divergence of the shear strain direction between layers; and constructing a response sequence by utilizing the consistency of grain boundary slippage and heat flow direction, comparing a path loading sequence with a response offset relationship, matching a path direction with a structure rhythm, and enhancing the coherence of a loading action and a grain slippage trend.

The invention discloses a model construction method considering the strain hardening and softening characteristics of a rib-soil interface, and the method comprises the steps: setting normal stress as a single variable, and obtaining a plurality of shear stress-shear displacement curves under different normal stress levels of a to-be-tested soil sample through a pull-out test; a model is established according to the influence rule of normal stress on the characteristics of the rib-soil interface and the change characteristics of the interface shear stress in the shearing process. According to the model considering the strain hardening and softening characteristics of the reinforcement-soil interface, the characteristics of the reinforcement-soil interface in different stress states can be predicted more accurately, the efficiency is high, and the cost is low.

The invention relates to the technical field of physical acoustics, in particular to a saturated porous medium metasurface Portrait wave frequency dispersion relation calculation method and system, and the method comprises the following steps: obtaining expressions of solid skeleton displacement, fluid relative displacement, total stress, solid shear stress and pore pressure under the action of Portrait waves; obtaining an expression of a fluid displacement component and a fluid normal stress; obtaining an expression about the relative motion of the resonator; according to all the expressions, stress and displacement continuity boundary conditions are applied to the interface of the saturated porous medium and the fluid layer, a characteristic equation of frequency dispersion characteristics is obtained and solved, and a frequency dispersion curve is obtained. According to the method, the explicit frequency dispersion relation of the saturated porous medium metasurface portrait waves is provided, the calculation efficiency and prediction precision of complex interface wave propagation are improved, the optimal design of the metasurface resonator array can be guided, and a key theoretical tool and technical support are provided for design of high-performance acoustic functional devices and structures.

The invention discloses a reflooding cooling process analysis method and system. The method comprises the following steps: step 1, obtaining reflooding process data; 2, according to the re-submerging process data, obtaining a liquid core shear stress relation and a constitutive relation, and obtaining a disturbance wave height; 3, according to local shock cooling in the cooling process, a liquid film dynamic equilibrium relation is constructed, and the average vapor film thickness is obtained; 4, axial distribution of the minimum film state boiling temperature is obtained according to the disturbance wave height and the average steam film thickness; 5, shock cooling moments at different axial heights are obtained according to the axial distribution of the minimum film state boiling temperature, the relationship among the shock cooling speed, the shock cooling moments and the heights is obtained, the shock cooling speed of all the shock cooling moments is solved, and then analysis of the re-submerging cooling process is completed; according to the method, the problem of strong correlation of time-physical behaviors of two-phase evolution in the whole re-submerging process is solved, and accurate prediction of the whole strong transient re-submerging cooling process is realized.