297 results about "Finite element approach" patented technology

The invention discloses a ship shafting reliability evaluation method and system based on multiple working conditions, and the method comprises the steps: collecting multi-source data of a ship propulsion system through integrating multiple sensors; constructing a dynamic load spectrum based on a time-varying Copula function in combination with parameters such as a stress distribution function and a degradation amount distribution function; a reduced basis finite element method is adopted, experimental strain data are collected, and a reduced-order basis matrix is constructed; based on a three-stage Wiener degradation model, in combination with parameters such as a material degradation rate, activation energy and a temperature average value, the residual life of the ship propulsion system is predicted, and model parameters are adjusted in real time through a Bayesian dynamic updating mechanism; building Hamiltonian through physical constraint reinforcement learning, and optimizing operation parameters of the ship propulsion system in combination with a fault probability threshold value and an energy change rate threshold value; a digital twin engine is utilized to provide real-time visual output. According to the invention, the service life is prolonged to the greatest extent while the system meets the performance requirements; and monitoring and decision making by operators are facilitated.

The invention provides a DCIM-based method for rapidly calculating a green function of a uniaxial anisotropic layered medium and an electromagnetic simulation system. The method comprises the following steps: modeling a uniaxial anisotropic layered medium to be simulated; determining a uniaxial anisotropic dielectric material of each layer, and assigning transverse parameters and longitudinal parameters; determining longitudinal coordinates of field point and source point distribution required to be solved, fitting a uniaxial anisotropic medium Green function spectral domain expression under the field source distribution by using a DCIM method, and solving an analytical expression in a spatial domain by using Somerfeld identical equation properties; solving the size of the electromagnetic field on the plane according to the fitted analytical expression; compared with a direct numerical integration method or a finite element method numerical solution using the Green function, the method has the advantages that the airspace analytical expression corresponding to the field source distributed on the plane is directly fitted, so that the solution of the airspace Green function is greatly accelerated, and the calculation efficiency and the calculation precision are both good in an actual example.

The invention discloses a biconical antenna balun equivalent circuit modeling optimization method based on a multi-conductor transmission line, and belongs to the technical field of electromagnetic simulation. The method comprises the following steps: firstly, establishing a three-dimensional electromagnetic model of a biconical antenna balun based on a finite element method, and setting ports and defining boundary conditions in combination with an actual current transmission path; then, distribution parameters among conductors are extracted through a multi-conductor transmission line theory, and a Balun circuit topological structure is constructed; and finally, taking the antenna coefficient as an optimization target, carrying out iterative optimization on equivalent circuit element parameters by adopting a multi-target genetic algorithm, considering a plurality of optimization targets in a broadband range, and finally obtaining a high-precision equivalent circuit model. Through combination of electromagnetic simulation and an intelligent optimization algorithm, high-efficiency extraction of complex Balun structure distribution parameters and adaptive optimization of circuit parameters are realized, and the simulation precision of the biconical antenna is remarkably improved.

The invention belongs to the technical field of nuclear reactor physical numerical calculation, and particularly relates to a method for improving precision and convergence of solving a diffusion equation based on a PINN, and the method comprises the following steps: S1, building a neural network algorithm model combining a physical information neural network PINN and source iteration; s2, aiming at a multi-region smooth transition neutron diffusion problem with small cross section difference between materials, optimizing the neural network algorithm model by adopting an optimization strategy of a training level; and S3, aiming at the multi-region neutron diffusion problem of large neutron flux gradient at the boundary due to large cross section difference between materials, improving the neural network algorithm model by adopting a domain-divided neural network architecture. According to the method, the problem that the calculation cost is exponentially increased in a high-dimensional or complex geometric scene due to the fact that a traditional finite difference method and a finite element method depend on grid division is avoided.

The invention discloses a carbon dioxide geological sequestration quantity prediction method, system and device and a storage medium, and the method comprises the steps: obtaining a mathematical expression of carbon dioxide sequestration capacity through combining a coupling model of a flow field, a mechanical field and a thermal field with random parameters, and introducing a leakage risk coefficient; taking the weighted sum of the expected value of the storage capacity and the variance as an optimization objective function, and according to the mathematical expression of the carbon dioxide storage capacity, carrying out optimal solution solving on the carbon dioxide storage capacity to obtain an optimal storage strategy; performing spatial discretization on the control equation by adopting a finite element method, discretizing time by adopting a semi-implicit difference method, discretizing random variables by combining a random Galkin method, and solving a coupling model of a flow field, a mechanical field and a thermal field to obtain a prediction result of the carbon dioxide sequestration amount; and according to a prediction result of the carbon dioxide sequestration amount, outputting an expected value and a variance of the sequestration capacity, and generating a sequestration amount distribution diagram, a risk assessment diagram and a sensitivity analysis diagram.

The invention relates to the technical field of water conservancy projects, in particular to an anti-seepage control system for an earth rock cofferdam. The method comprises the following steps: periodically acquiring external hydro meteorological data and internal structure response data of a cofferdam through a sensor group based on a monitoring unit; establishing a multi-field coupling model based on a finite element method through a model building unit, and dynamically coupling a wave load, a tidal water level and an osmotic pressure field; the minimum cofferdam crest elevation is determined by comparing the difference between the minimum safety coefficient and a preset safety coefficient on the basis of a decision-making unit; and based on the analysis unit, inputting the minimum cofferdam crest elevation into the multi-field coupling model to obtain the maximum value of the hydraulic gradient of the escape point of the downstream slope within a third preset time period, determining an anti-seepage state based on the maximum value, and adjusting related parameters based on the anti-seepage state. The seepage risk of the cofferdam is monitored, predicted and actively controlled in real time, so that the seepage rate of the earth rock cofferdam is reduced.

The invention discloses a concrete panel tensile crack damage calculation method and a concrete panel tensile crack damage calculation system, which combine extended finite element calculation with a concrete tensile crack damage calculation model, accurately simulate crack behaviors in concrete, and are particularly suitable for numerical simulation requirements under the conditions of complex crack networks and large-scale damage. According to the method, the expansion finite element method is introduced, subtle changes of crack starting, expansion paths and final forms are captured on the premise that the calculation cost is not increased, the common problem of grid dependence in a traditional finite element method is avoided, fine division or frequent updating of grids is not needed, and the calculation efficiency is improved. The method reduces the preprocessing time and iteration times, reduces the consumption of overall computing resources, can accurately describe the expansion path of the crack and the nonlinear mechanical behavior of the concrete, and is suitable for the simulation of a complex crack network.

The invention discloses a low-frequency sound propagation loss forecasting method suitable for a polar region sea area, and the method comprises the steps: building a two-dimensional ice layer model of a forecast sea area according to remote sensing data based on the setting that sea ice of the polar region sea area is a uniform elastic medium; calculating hydrological conditions of the ocean sound channel of the polar sea area; establishing a forecast sea area two-dimensional seabed model according to the seabed topography sediment database; an under-ice sound field model is constructed based on a three-dimensional cylindrical coordinate system, sound pressure from unit intensity sound sources with different sizes and depths to a receiving point in a forecast sea area is calculated through a frequency domain finite element method in combination with a PML technology, and sound propagation loss of a needed position is obtained through calculation. According to the method, the application limitation of traditional ray and normal wave theories under complex boundary conditions is broken through through a finite element method, a synergistic effect mechanism of actual ice layer parameter space change, submarine topography fluctuation and sound velocity profile gradient characteristics is systematically analyzed, and sound field modeling is more accurately carried out on different ice layers and submarine topographies in the Chukong sea region all year round; the influence of sound wave propagation is simulated.

The invention discloses a foundation pit seepage-deformation space-time coupling early warning method and system based on a large geological model, and belongs to the technical field of geotechnical engineering intelligent monitoring, and the method comprises the steps: processing a regional geological survey report through the large geological model based on a Transform architecture, and generating a high-precision three-dimensional stratum parameter field; further, an improved particle finite element method is adopted to carry out dynamic coupling solution of a seepage field and a stress field, a displacement rate vector is obtained, a hybrid network space-time prediction model fused with LSTM-Transform is constructed, a composite early warning index is calculated in combination with the real-time displacement rate vector, and through multi-source data fusion and space-time coupling analysis, an early warning result is obtained. Accurate evaluation and advanced early warning of the seepage stability and the deformation state of the deep foundation pit project are achieved, the accuracy and reliability of early warning signals are remarkably improved, and the method is suitable for foundation pit safety control under complex geological conditions.

A method for simulating cross-seasonal heat storage of a buried pipe well group in a geothermal reservoir is characterized in that hot water and cold water are respectively injected in different seasons by arranging different injection ports in a countercurrent cross injection mode, so that a relatively balanced temperature distribution pattern of a'hot area 'and a'cold area' is formed in a stratum, and the volume structure of a buried pipe is simplified into a line unit model; discretizing the pipeline area by adopting a finite element method; on the basis, initial temperature field distribution of soil and initial parameters of fluid in a buried pipeline unit are set, a proper numerical solution method is selected to solve the pipeline unit model, and the stability of the calculation process and the accuracy of the result are ensured through real-time monitoring; in order to further analyze the influence of underground water seepage on the system performance, an underground water seepage module is introduced, and the difference between summer refrigeration and winter heat supply effects under the seepage condition or not is compared and researched; the invention further comprises a system, equipment and a storage medium for implementing the method.

The invention discloses a deep sea ultra-shallow gas layer drilling shaft multiphase flow obstacle risk prediction method, and relates to the technical field of petroleum and natural gas engineering, and the method comprises the following steps: building a shaft-sedimentary layer heat-force-solid-chemical multi-physics field coupling model and a 3D model, setting initial boundary conditions, and dividing grids; model parameters are input, a finite element method is used for solving a multi-physics field coupling numerical value, and the gas invasion amount and the hydrate blocking rate are calculated; analyzing a gas invasion-migration-pressure evolution mode; researching the secondary generation and deposition characteristics of the hydrate; establishing a risk assessment system based on the parameters to divide risk levels; a historical data verification model is selected, and when the deviation rate exceeds 15%, parameters are optimized and solution is carried out again. According to the method, the defects of traditional single-field analysis are overcome, the multi-phase flow obstacle risk prediction accuracy is improved, intervention guidance is provided, model verification guarantees stability, safe and efficient mining of the deep sea ultra-shallow gas layer is assisted, and related development technology progress is promoted.

The invention relates to the technical field of acoustic functional devices, and discloses an acoustic black hole lens based on a three-dimensional radial gradient refractive index phonon crystal structure and a design method, a three-dimensional radial gradient refractive index distribution function n (r) with a center convergence characteristic is constructed, and incident sound waves are continuously guided and efficiently focused to the center of the lens in the propagation process; combining the feasibility constraint of an additive manufacturing process, designing a few-negative micro-lattice structure unit for realizing the gradient refractive index distribution, and determining key geometric parameters of the few-negative micro-lattice structure unit; according to the refractive index distribution function n (r), radially arranging the micro-lattice units in a three-dimensional space, and constructing an initial lens model; the sound field distribution, focusing performance and energy convergence efficiency of the model are verified and iteratively optimized in a mode of combining analytical modeling and finite element method simulation, and a three-dimensional radial gradient refractive index photonic crystal acoustic black hole lens design model with wide-angle incidence compatibility and broadband response capability is obtained.

The invention provides a near-wellbore hydraulic fracture deformation and expansion heat-fluid-solid coupling simulation method and system, and the method comprises the steps: generalizing a reservoir rock mass into a matrix and a fracture, building a heat-fluid-solid coupling mathematical model, and describing the mechanical processes of fluid flow, heat conduction and convection, rock mass deformation and fracture expansion; a three-dimensional displacement discontinuous method DDM and a virtual stress method FSM are adopted to calculate the induced stress of the fracture and the induced stress of the shaft respectively, and fluid flow, temperature change, matrix deformation and mass heat exchange of a matrix and the fracture are calculated through a finite volume method and a finite element method; on the basis of linear elastic fracture mechanics, the crack propagation direction and speed are calculated in combination with the maximum circumferential stress criterion and the Paris scale law; and a dynamic grid fracture front edge tracking technology is adopted to update the fracture form, a three-dimensional non-planar fracture expansion model is formed, and near-wellbore hydraulic fracture full-process simulation is realized.

The present invention relates to the technical field of motor design, and provides a method for calculating a leakage magnetic coefficient of a closed slot in a rotor of an asynchronous motor. According to the calculation method provided by the present invention, by means of diverting the magnetic flux of rotor teeth in combination with a relative magnetic permeability calculated from a magnetization curve, a closed slot is ultimately transformed equivalently into a semi-closed slot, thereby unifying the semi-closed-slot and closed-slot algorithms and improving the adaptability of the closed-slot algorithm. The present method provides a general algorithm for closed-slot parameters, takes into account the edge effects caused by punching and shearing of cold-rolled silicon steel sheets, and is applicable to closed slots of various rotor slot types. Compared to finite-element methods, the present method has a short calculation cycle and is suitable for programmatic processing.

The invention discloses an SEM-FEM-SPH simulation method and an SEM-FEM-SPH simulation system for a three-dimensional seismic source-landslide. According to the method, a spectral element method, a finite element method and a smoothed particle fluid dynamics method are combined, and simulation of the whole process from seismic source fracture to landslide starting, slippage and accumulation triggered by space seismic oscillation is achieved. The method comprises the following steps: simulating a regional seismic wave field through a spectral element method to generate a local slope spatial non-uniform seismic motion field, proposing a local slope FEM-SPH three-dimensional bridge domain coupling model considering a complex terrain effect, and realizing seamless connection of a regional scale SEM model and the local FEM-SPH coupling model based on an internal input method. According to the method, the limitation of uniformly inputting assumed and preset slip crack surfaces in traditional earthquake landslide simulation is overcome, direct numerical simulation of the whole process from seismic source fracture to earthquake triggered landslide inoculation, migration and accumulation under the high mountain and valley complex site condition can be realized, and a key technical support is provided for earthquake landslide disaster risk assessment.

The invention provides a calculation method for the elastic modulus of a soil-rock mixture based on a mesoscopic structure model, relevant to the field of meso-numerical simulation of geotechnical materials. It includes the following steps: obtaining the gradation curve of soil-rock mixture particles through a screening test and constructing a two-dimensional random meso-structure model of the mixture with varying stone contents. Using the finite element method, a biaxial compression numerical test is conducted on the model under different stone contents and confining pressures. The equivalent elastic modulus of the mixture is determined by the corresponding secant elastic modulus at an axial strain of 1%. This macro-equivalent elastic modulus, considering stone content and confining pressure, is then fitted. This method effectively addresses the challenge of presenting accurate physical and mechanical parameters in engineering design and construction, making it directly applicable to practical engineering involving soil-rock mixture materials.

The invention provides a numerical method for immiscible solution drop swallowing behavior in limited shear flow, and relates to the technical field of immiscible solution drop swallowing behavior, a simulation task based on a phase field model and a Navier-Stokes equation is established, a computational domain is discretized through a finite element method, a physical field is initialized, and in each time step, the physical field of the immiscible solution drop swallowing behavior in limited shear flow is calculated. Updated velocity field and phase field data are obtained through coupling solution, the interface curvature change rate and the flow field vorticity intensity are comprehensively calculated, a global index representing the dynamic intensity of the system is generated, the index is compared with a preset threshold value, and the dynamic intensity of the system is calculated. When the index is higher than a threshold value, a smaller step length and a higher grid resolution are adopted, otherwise, a larger step length and a lower resolution are adopted, finally, solver configuration is automatically reconstructed according to the selected parameters, solving is continued under a new adjusting strategy, a self-adaptive numerical simulation cycle is formed, and a new time step is obtained. And completing simulation and outputting complete field data of the liquid drop swallowing process.

The invention relates to the technical field of electric power, in particular to a multi-field coupling optimization design method applied to a high-voltage wall bushing. According to the technical scheme, the method comprises the following steps: (1) constructing a three-dimensional geometric model of the high-voltage bushing, and solving an electric-thermal bidirectional coupling field based on a finite element method; selecting a to-be-optimized variable, and constructing a dual-objective function of an electric field distortion coefficient and a hot spot temperature through nonlinear regression; (2) carrying out multi-target optimization by adopting an improved multi-target particle swarm algorithm coupled with the soup discharge discrimination, and synchronously executing discharge risk screening in an iteration process; and (3) generating an optimization design scheme based on the Pareto leading edge solution set, and verifying that the design is effective through a field distribution test. Therefore, the establishment of the optimization problem is more accurate, the optimization efficiency is higher, and the phenomena of partial discharge and the like of the bushing caused by a local high-field-intensity region generated in the design can be avoided.

The invention belongs to the technical field of oil and gas field development, and particularly relates to a coupling simulation method for inter-well interference and fracture network evolution in the multi-well-group time sequence fracturing process. The method comprises the following steps: firstly, constructing a high-precision three-dimensional geomechanical model through multi-source data fusion, and solving a reservoir initial crustal stress field based on a finite element method; then time sequence fracturing multi-physics field coupling simulation is carried out according to the actual construction sequence, and a crustal stress field is updated and calculated in real time based on a finite element method; the updated stress field serves as an initial condition of subsequent sub-well simulation, and cross-time-sequence accurate representation of stress interference is achieved; and finally, numerical simulation of all fractured wells is completed through a whole well group iterative simulation process, and fracture network characteristic parameters and a stress interference cumulative effect are output. According to the method, full-process coupling analysis from geological modeling to full-well group fracturing simulation is innovatively realized, and a reliable technical means is provided for optimizing fracturing design.

The invention discloses a shape memory alloy multi-physics field analysis method based on an expansion depth operator network, belongs to the technical field of material science and engineering calculation, solves the problem of phase field dynamics analysis of multi-physics field coupling under various initial conditions, and comprises the following steps: S1, constructing the expansion depth operator network, the expansion depth operator network comprises a branch network and a backbone network; and S2, determining the total error of the neural network according to the data information error and the physical information error, optimizing the parameters of the neural network by adopting an AdamW optimizer and a Minibatch technology, training the neural network, and completing the shape memory alloy multi-physical field analysis based on the extended depth operator network. According to the method, the expansion depth operator network is used for replacing a finite element method, the solving process of the multi-physical field phase field equation is accelerated, field quantity distribution continuous in time and space is obtained, the solving process is accelerated, and continuous field distribution is obtained.

The application relates to the technical field of cantilever pouring construction, in particular to a cantilever pouring construction method and system based on a finite element method. The method comprises the following steps: constructing a multi-scale finite element analysis model, simulating structural responses in different construction stages under the condition of each age stage through the constructed multi-scale finite element analysis model, determining control parameters of the cantilever pouring construction based on the simulation results; and comparing real-time sensing data with the control parameters of the time step in the multi-scale finite element model constructed before construction, forming a structural dynamic error vector, performing dynamic feedback adjustment of the cantilever pouring construction based on the structural dynamic error vector, and determining the best construction path of the cantilever pouring construction. Through the process parameter inversion technology based on the structural response ternary function group, the application realizes accurate control of response quantities such as structural principal stress, deflection and node axial force in the construction process, and improves the bridge completion precision and structural performance consistency of the cantilever pouring.

The invention discloses a strike-slip fault zone activity ability evaluation method based on a finite element method, and the method comprises the steps: determining the three-dimensional space distribution characteristics of a strike-slip fault zone, determining the evaluation range of the activity ability of the strike-slip fault zone, determining the ground stress state of a research region, carrying out the finite element stress analysis, and carrying out the simulation data of the ground stress distribution, thereby achieving the evaluation of the activity ability of the strike-slip fault zone. The method comprises the following steps: calculating the acting force of different parts of a strike-slip fault zone, calculating two parameters for evaluating the activity capability of the strike-slip fault zone, optimizing the data distribution range of the two parameters according to the strike-slip fault zone activity capability evaluation threshold values of the two parameters, and screening the data capable of being used for evaluating the activity capability of the strike-slip fault zone by utilizing a cumulative multiplication method, so as to evaluate the activity capability of the strike-slip fault zone. The invention relates to a method for finely evaluating active parts of strike-slip fault zones and activity of different parts. According to the method, the activity capability difference of different parts of the strike-slip fault zone can be quantitatively judged, and an effective scheme is provided for professional technicians for researching activity capability evaluation of the strike-slip fault zone and well location deployment.

The present application relates to the technical field of high-voltage power transmission and distribution, and particularly relates to a three-dimensional electromagnetic simulation calculation method and system for transformer core loss, which comprises the following steps: constructing a three-dimensional electromagnetic simulation model of a transformer core, wherein the three-dimensional electromagnetic simulation model comprises a plurality of grid units discretized based on a finite element method; performing electromagnetic simulation solving on the three-dimensional electromagnetic simulation model by using a time-domain finite element method to obtain the magnetic induction intensity amplitude in each grid unit; querying the B-P curve data according to the magnetic induction intensity amplitude of each grid unit to determine the corresponding unit volume loss; and performing unit integration on the whole domain of the core based on the unit volume loss to obtain the total loss, thereby realizing the calculation of the core loss. According to the method of the present application, the calculation error is effectively reduced, and the calculation accuracy of the unit loss is significantly improved.

The invention discloses a fluid filling pipeline guided wave modal tracking method based on an optimal transmission distance. The method comprises the following steps: firstly, calculating a characteristic solution by using a semi-analytical finite element method; secondly, introducing an optimal transmission distance (EMD) in an optimal transmission theory as modal similarity measurement, measuring modal similarity by calculating the minimum physical work of kinetic energy distribution rearrangement, and combining a section geometric geodesic distance to enhance physical interpretability; meanwhile, a continuous stabilization strategy based on wavenumber prediction is introduced to suppress mismatching; and finally, realizing global optimal modal matching by using a Hungary algorithm. According to the method, modal exchange errors can be effectively eliminated, tracking robustness is kept in a complex frequency dispersion area, and meanwhile, visual graphic interpretation of modal evolution can be provided.

The invention discloses a method for designing a mixed type boundary contour line of a progressive multi-focus ophthalmic lens, and belongs to the field of design of progressive multi-focus ophthalmic lenses. The method comprises the following steps: constructing a Laplacian equation, and selecting a mixed rectangular boundary as a boundary of the Laplacian equation; two nodes with adjustable positions are arranged on the right side edge of the second rectangular boundary; solving a Laplacian equation for the second rectangle by adopting a finite element method, and carrying out interpolation to obtain a contour line numerical matrix solution of the second rectangle; and combining the contour line numerical solutions of the first rectangle, the second rectangle and the third rectangle to obtain a contour line function numerical matrix solution of the hybrid rectangular region. According to the invention, the contour line mixed type boundary design method is utilized to greatly improve the use range of the far vision area and the near vision area of the ophthalmic lens again, reduce the astigmatism area and improve the optical performance of the lens; the contour line mixed type boundary design method provided by the invention can also be applied to the personalized design aspect of progressive multi-focus spectacle lenses.

This invention belongs to the field of reactor structural mechanics technology, specifically relating to a method for analyzing and evaluating high-temperature bolted connection sealing structures. The invention includes the following steps: selecting the location of the reactor pressure vessel flange and main bolt connection as the object of sealing structure analysis; analyzing and summarizing the influence of gasket data on the deformation and contact surface pressure of various components of the flange bolted connection structure; researching current standards and analyzing their limitations; using the finite element software ANSYS to perform finite element modeling of the reactor pressure vessel flange and main bolt structure; applying loads and constraints to the finite element model of the reactor pressure vessel flange and main bolt structure; calculating the deformation and stress of the structure using different creep and relaxation models; analyzing the relaxation behavior of the high-temperature flange bolted connection structure using experimental methods; and comparing and analyzing the results of the finite element method, the standard method, and the experimental method. This invention enables the analysis and evaluation of the sealing performance of flange bolted connection structures under high-temperature environments.

The present application relates to salt cavern gas storage monitoring technical field, especially in based on optical fiber sensing's salt cavern gas storage real time monitoring early warning method and system, the method includes the following steps: the three-dimensional model of salt cavern gas storage is built, and then the monitoring node is determined; according to the layout of monitoring node along the cavity inner wall of salt cavern gas storage lays distributed sensing optical fiber, to obtain temperature data and strain data in real time;According to three-dimensional model, temperature data and strain data, based on finite element method inversion salt cavern gas storage pressure field, obtains the pressure data in the salt cavern; DTS-Raman compound optical fiber is vertically hung in the salt cavern gas storage to obtain gas halogen interface height data;The salt cavern gas storage environment monitoring early warning system is built, and when meeting the early warning condition, early warning is sent out.The present application can realize long distance on-line monitoring and early warning to salt cavern gas storage, and can carry out the multi-parameter fusion analysis of salt cavern gas storage, improve the accuracy of monitoring and early warning, and can reduce the cost of monitoring and early warning.

The application provides a chain calculation method of a suspension type steel structure support system based on elastic stability theory, and belongs to the field of foundation pit support, and comprises the following steps: a mechanical calculation model is established, the stiffness of the first layer truss and the suspension component is synthesized into equivalent stiffness according to a series coupling relationship, and the support effect of the upper structure on the support component is equivalent to an elastic support; based on the mechanical model, a deformation coordination equation is established by using the force method principle, a flexibility matrix is constructed, and the second order effect caused by the axial force and the rotation and translation coupling effect are considered; the last support component is taken as a starting point, each support component is sequentially solved from bottom to top, the support reaction force of the current support component at the elastic support is taken as an equivalent external load and is applied to the corresponding elastic support of the adjacent upper support component, and the internal force and deformation distribution of the whole suspension type steel structure support system are obtained by combining the deformation coordination equations of each support component. The method avoids the problem of large calculation workload of the finite element method.

A finite element-based ore deposit drilling information processing and analysis method and device are described herein. The information processing method includes: dividing finite elements based on related information of an exploration borehole, and constructing corresponding sectional finite element planes; and performing three-dimensional (3D) spatial co-position stacking on the sectional finite element planes, and constructing scanning analytic finite element profiles through spatial analysis. According to the method, geological borehole information can be visually analyzed and presented in a sectional and layered mode, and the method has excellent practical value and indicating significance for accurate delineation of prospecting target areas, accurate mining, dressing and smelting, and structural metallogenic research.

The present application relates to the technical field of hydraulic engineering, and more particularly to a seepage control system for earth-rock cofferdams. The present application periodically collects external hydro-meteorological data and internal structural response data of the cofferdam through sensors based on a monitoring unit; a multi-field coupling model is established based on the finite element method through a model construction unit, dynamically coupling wave load, tidal level and seepage pressure field; the minimum cofferdam top elevation is determined by comparing the difference between the minimum safety factor and the preset safety factor based on a decision unit; and the minimum cofferdam top elevation is input into the multi-field coupling model based on an analysis unit to obtain the maximum value of the hydraulic slope of the backwater slope escape point within a third preset time period, the seepage state is determined based on the maximum value, and the related parameters are adjusted based on the seepage state. The present application reduces the leakage rate of earth-rock cofferdams through real-time monitoring, prediction and active control of cofferdam seepage risk.