107 results about "Kriging surrogate model" patented technology

The present invention relates to an adaptive assessment method and apparatus for nuclear power plant component reliability, a storage medium, and an electronic device. The method comprises the following steps: constructing a Kriging initial model; gradually updating the Kriging initial model on the basis of first-layer samples of ICE to obtain a Kriging surrogate model; gradually updating the Kriging surrogate model on the basis of last-layer samples of the ICE; after the updating of the Kriging surrogate model is completed, obtaining a current Kriging model; and on the basis of the current Kriging model, assessing the reliability of a component to be assessed. In the present invention, first-layer adaptive Kriging gradually updates and explores a failure domain on the basis of the first-layer samples of the ICE until a set stopping criterion is satisfied, and on the basis of a currently constructed Kriging model, the last-layer samples of the ICE are also updated accordingly. Thus, it is ensured that an estimated failure probability converges unbiasedly to a real failure probability, and unnecessary updating of Kriging is avoided, thereby greatly improving calculation efficiency and saving calculation costs.

The invention belongs to the technical field of engineering mechanical structure health monitoring, and particularly relates to a dynamic prediction method for multi-working-condition stress of a tower crane based on a constraint space Kriging agent model. Comprising the steps of system parameter acquisition and constraint space construction, physical constraint sample generation, efficient stress sample calculation, agent model training and real-time stress distribution prediction. According to the method, the Kriging agent model and the variable grid density optimization strategy are organically combined, the calculation efficiency is high, the efficient dynamic prediction capability is achieved, and the real-time prediction requirement under the dynamic working condition is met; a Latin hypercube sampling method in a physical constraint space is adopted, and a simulated annealing optimization technology is combined, so that invalid sample points are effectively eliminated, and the utilization rate of a sample space is improved; a nonlinear mapping relation between multiple parameters of hoisting weight-amplitude-speed and full-beam long stress distribution is established through a Kriging agent model, the limitation that a traditional method only supports fixed working conditions is broken through, and an accurate and rapid response model is provided for structural health monitoring under complex working conditions.

The invention relates to an IGBT reliability evaluation method based on adaptive sampling and a physical information neural network, and the method comprises the following steps: S1, constructing an IGBT physical model, and determining an input variable and an output response; s2, generating an initial training sample, and constructing an initial Kriging agent model; S3, adaptively selecting a new training sample point by using a U learning function; S4, updating the current Kriging agent model based on the new training sample point, and repeating S3 and S4 until one of stop criteria is met; s5, constructing a PINN model; s6, training of a PINN model is carried out; and S7, performing IGBT reliability evaluation based on the trained PINN model to obtain an evaluation result. Compared with the prior art, the IGBT reliability evaluation method has the advantages of improving the efficiency, precision and interpretability of IGBT reliability evaluation and the like.

The application discloses a kind of design methods of building water supply and drainage system, it is related to the technical field of drainage system, including using BIM positive design method to draw out the distribution of building drainage system pipeline and drainage equipment, using numerical simulation method to measure drainage data, using analytic hierarchy process to construct judgment matrix after the drainage data is layered, calculate weight index, combine Kriging surrogate model and bat model, calculate the optimal arrangement mode of different function drainage pipeline and drainage equipment and the optimal number of fire hydrant.The design method of building water supply and drainage system can optimally arrange drainage equipment, realize the most rationalization, the most efficient use of drainage equipment to discharge building water and at the same time consider water circulation and material utilization maximization, while considering the influence of fire emergency on drainage system, corresponding disaster response measures required by the most favorable fire-fighting equipment arrangement is designed.

The invention discloses a differential active temperature control matching method and system based on fluid thermosetting coupling analysis. The method comprises the following steps: determining a multi-physical field action form of a machine tool structure; a fluid-heat-structure multi-physics field coupling simulation model is obtained, specifically, coupling simulation of a cooling fluid field, an endogenous heat field and a machine tool structure field is conducted in sequence, and an effective multi-physics field coupling simulation model is obtained; adopting a response surface design method to generate multiple groups of DOE analysis working conditions; a Kriging algorithm is adopted to construct an agent model and establish a mapping relation: based on the DOE sample points and simulation results thereof, the Kriging agent model is trained, and a mapping relation between machine tool detection parameters and active temperature control parameters is established through an automatic refining process; based on the mapping relation, performing multi-objective optimization on temperature control parameters by taking thermal deformation of the key position as a constraint, and realizing differential control strategy matching of each temperature control loop; the problem of thermal deformation caused by thermal characteristic change of a machine tool structure is solved.

The invention discloses a Kriging agent model-based engineering structure reliability analysis method, which comprises the following steps of: sampling from random variables and probability distribution of an object to be analyzed, and respectively obtaining a candidate sample set and an initial sample set; obtaining an initial experimental design set based on the initial sample set and the corresponding real response value, and constructing an initial Kriging agent model about the to-be-analyzed object; obtaining an optimal sample from the candidate sample set through a random weight learning function, and expanding the optimal sample and a corresponding real response value to an initial experimental design set; before the initial experimental design set enters the next round of data expansion, deleting an optimal sample in the current round and sample data in a preset redundancy distance range of the optimal sample from the candidate sample set; updating and iterating the initial Kriging agent model about the to-be-analyzed object through the experimental design set; and calculating the reliability index of the to-be-analyzed object according to the failure probability calculated by the current Kriging agent model.

The invention relates to the technical field of extremely-small curved surface structures, in particular to an optimal design method, system and equipment for an extremely-small curved surface structure and a storage medium. The minimum curved surface structure optimization design method comprises the steps that a multi-objective optimization problem is determined according to design variables and optimization objectives of a three-period minimum curved surface lattice structure; constructing an approximate function relationship between the optimization target and the design variable by utilizing a self-adaptive multi-target engineering optimization method of a Kriging agent model; latin hypercube sampling and a sequential quadratic programming optimization algorithm are combined to carry out optimization design on the three-period minimal curved surface lattice structure. According to the design method, the light / bearing / wave-absorbing minimum curved surface lattice sandwich structure with good structure-performance dual characteristics can be designed, the wave-absorbing structure is filled with the minimum curved surface lattice structure in a shape follow-up mode, design and manufacturing of a wave-absorbing and bearing integrated structure are achieved, and rapid iteration and performance improvement of design of the wave-absorbing and bearing structure are supported.

The invention provides a composite beam reliability optimization method based on a failure probability function. The method comprises the following steps: 1) defining a random input variable, a design variable, a target function and a performance function; 2) calculating a failure sample and an extended failure probability based on an autonomous learning Kriging agent model and a Monte Carlo method according to the Bayesian theory; the method comprises the steps of (1) calculating a design parameter failure sample, (2) calculating a joint probability density implicit function on the basis of an adaptive K-nearest neighbor method and autonomous learning Kriging according to the calculated design parameter failure sample, and (3) calculating a failure probability implicit function on the basis of the Bayesian theorem.By means of the method, the problem that in the reliability optimization process, the calculation cost is difficult to bear due to reliability analysis is solved.

This invention discloses a method and system for optimizing the design of offshore wind turbine support structures based on a surrogate model. The method establishes the relationship between the design parameters of the support structures for offshore wind turbines of different capacities and the structural performance response of the optimized design based on the Kriging surrogate model. Simultaneously, it optimizes the tower and monopile foundations to find the lightest overall support structure design. This method avoids getting trapped in local optima during the optimization design of offshore wind turbine support structures, which would otherwise only result in finding the lightest tower or monopile design. Using the method and process of this invention, after load calculation, the tower and foundation structures are simultaneously checked and optimized, leading to a globally optimal design. This results in a stronger overall structure, more uniform stiffness distribution, and more rational stress distribution, ultimately achieving the lightest overall support structure weight. Optimization based on the surrogate model reduces the number of computer simulations required for structural analysis, improving optimization efficiency.

The invention discloses a light high-strength orthogonal isotropic steel bridge deck structure and a parameter optimization method thereof, and belongs to the technical field of bridge engineering, the structure comprises a top layer steel plate, a lower layer steel plate, longitudinal plate ribs, a diaphragm plate and a diaphragm plate bottom plate, and the longitudinal plate ribs and the diaphragm plate are separated to form closed plate grid cavities. A flexible transition rib array composed of a plurality of independent ribs is arranged in the bridge direction in an opening area formed when a transverse partition plate penetrates through longitudinal plate ribs and is located below a top-layer steel plate, and a response surface model is coupled according to a preset multi-parameter. Through finite element analysis, Latin hypercube sampling, Kriging agent model construction and multi-target genetic algorithm global optimization, inversion optimization from a preset performance target to an optimal geometric parameter combination of each flexible transition rib is realized, the fatigue performance at the opening of the diaphragm plate is improved, and meanwhile, the lightweight and economical efficiency of the structure are realized.

The invention discloses a method for quickly acquiring unsteady aerodynamic characteristics of a flexible variable sweepback wing, which comprises the following steps of: determining design variables, sampling each design variable based on a Latin hypercube design method, and calculating simulation response values corresponding to sample points; forming a sample data set by the sample points and the corresponding response values, establishing a Kriging agent model on the basis, and training the model; performing fitting precision test on the trained Kriging model by adopting a goodness-of-fit method, if the Kriging model is unqualified, adding new sample points, obtaining corresponding simulation response values, adding the simulation response values into a sample database, re-training the Kriging model, and obtaining the unsteady aerodynamic characteristics of the flexible variable sweepback wing under different flight conditions based on the qualified Kriging model. According to the method, the Kriging model is constructed and trained based on different flight working conditions and the corresponding unsteady aerodynamic characteristic sample data sets, the unsteady aerodynamic characteristics of the flexible variable sweepback wing under the unknown flight working condition can be rapidly obtained, high calculation cost of CFD simulation calculation is avoided, and the method has practical engineering value.

This invention belongs to the field of electrical digital data processing technology, specifically relating to a multi-objective optimization method for improving motor torque performance. The method includes: establishing a parameterized model of the motor; extracting geometric harmonic prior features based on the harmonic analysis principle of the motor's air gap magnetic flux density, and using these as a screening criterion to obtain an initial high-quality sample set; constructing a Kriging surrogate model reflecting the mapping relationship between design variables and performance response, introducing an energy efficiency boundary risk function during the construction process; based on the Kriging surrogate model, using a multi-objective optimization algorithm to search for a Pareto front solution set, selecting potential sample points from the Pareto front solution set for simulation verification, and then adaptively updating the Kriging surrogate model until the stopping criterion is met, at which point the target motor design parameters are output. This invention can achieve accurate optimization of electromagnetic parameters by screening samples through geometric harmonic prior features and utilizing the energy efficiency boundary risk function.

The invention discloses a turbine disc fatigue reliability life influence factor importance analysis method, which comprises the following steps of: converting fatigue reliability life sensitivity into unconditional fatigue reliability life and conditional fatigue reliability life calculation under characteristic points through Gauss integral, and establishing a self-adaptive updating criterion of a finite element Kriging agent model; the finite element Kriging agent model is iteratively updated, so that the analysis time of single-time fatigue life reliability in the fatigue reliability life analysis process is shortened, and unconditional fatigue reliability life analysis and conditional fatigue reliability life analysis are based on a structural finite element model of the same structure; the idea of sequence updating structure finite element is provided and is applied to the fatigue reliability analysis life process of the semi-proxy algorithm, so that the sequence sharing of the training sample set in the fatigue life reliability analysis method under different fatigue life thresholds is realized; and the solving efficiency of the unconditional fatigue reliability life and the conditional fatigue reliability life is improved.

The application discloses a new energy station frequency control parameter collaborative setting method and application thereof, and the method comprises the following steps: constructing an optimized parameter vector x containing a network type and a network type station heterogeneous control parameter; establishing a comprehensive objective function f(x) which fuses the system frequency deviation minimization and the parameter adjustment cost minimization, and generating an initial training sample database corresponding to the comprehensive objective function based on sampling; constructing an anisotropic Kriging surrogate model based on the initial training sample database; constructing a sparse degree weighted adaptive expected improvement SW-AEI adding point criterion based on the anisotropic Kriging surrogate model, and screening an optimal candidate vector with the maximum sparse degree weighted adaptive expected improvement value; updating a new sample to the training sample database to recalibrate the anisotropic sensitivity hyperparameters in the anisotropic Kriging surrogate model until a convergence condition is met, and outputting the optimal collaborative control parameter.

The present invention relates to the field of fluid control technology, and discloses a fluid control intelligent adjustment method and system for a microfluidic chip. The method includes: collecting data of an adaptive fluid controller, a microfluidic channel pressure sensor array, a temperature sensor array and a flow sensor array based on the microfluidic chip to obtain real-time fluid parameter monitoring data; performing feature extraction to obtain a multi-dimensional fluid feature matrix; establishing a three-dimensional fluid model of the microfluidic channel and solving to obtain flow field distribution data; inputting the flow field distribution data into a Kriging surrogate model, establishing a mapping model between the channel width, depth, length and fluid control performance, and calculating to obtain an optimal geometric parameter combination; performing multi-level calculations on the fluid pressure uniformity, temperature distribution uniformity and flow rate stability to obtain a hierarchical fluid parameter control strategy. The present invention effectively solves the problem of multi-physical field coupling, reduces the computational complexity of the control system, and improves the execution efficiency of the control strategy.

The invention provides a high-efficiency magnetic field optimization method for a wind power electromagnetic brake, and belongs to the technical field of wind power electromagnetic brakes. Air-gap magnetic field distribution is calculated by using a fast multi-pole expansion algorithm, and feedforward compensation is performed on coil excitation current through a Preisach inverse model adaptive identification algorithm to improve the uniformity of a magnetic field; an operator splitting method is adopted to solve a magnetic-thermal coupling problem, material parameters are corrected according to temperature, an optimization objective function including air gap magnetic flux density maximization, magnetic field uniformity minimization and temperature constraint is established, Latin hypercube sampling is utilized to generate a training data set, optimization iteration is carried out through a Kriging agent model in combination with an expectation improvement criterion, and a training result is obtained. And outputting the optimal design parameters. The technical problems that the calculation efficiency of the wind power electromagnetic brake in the magnetic field optimization process is low, and the hysteresis nonlinear characteristic and the multi-physical field coupling effect are difficult to accurately consider are solved.

The present invention discloses a method and system for dynamic water distribution of a natural draft cooling tower. The method includes the following steps: testing the natural draft cooling tower to obtain the performance parameters of the cooling tower, where the natural draft cooling tower includes a water distribution actuator of the cooling tower; constructing a CFD simulation model of the natural draft cooling tower; calculating by taking the performance parameters of the cooling tower as boundary conditions of the CFD simulation model of the natural draft cooling tower to obtain sample point response values; constructing a Kriging surrogate model and training it using the sample point response values; using the trained model to collect data of the water distribution actuator of the cooling tower and processing the data to obtain the adjusted initial circulating water flow rate of the fan-shaped area; and performing water distribution adjustment on the water distribution actuator of the cooling tower based on the adjusted initial circulating water flow rate of the fan-shaped area. The present invention realizes dynamic water distribution of the natural draft cooling tower according to environmental conditions, and reduces the influence of environmental side wind on the heat transfer performance of the natural draft cooling tower.

The present invention discloses an SMT packaging reliability optimization method for interface contact pressure, which relates to the technical field of electronic packaging, and includes: determining the geometric parameters, physical properties parameters and design domain of the packaging; sampling within the design domain; constructing a parametric characterization model of the packaging; constructing a solder joint viscoplastic constitutive model, constructing a solder joint cohesive force model and constructing a solder joint temperature cycle load curve; constructing a finite element model under temperature cycle load; performing finite element simulation analysis to form contact pressure sample points; constructing a Kriging surrogate model; obtaining updated geometric parameter sample points; judging whether the convergence stagnates; if not, performing finite element simulation analysis until the convergence stagnates; if so, judging whether the termination criterion is satisfied; if so, outputting the geometric parameters corresponding to the minimum contact pressure; if not, updating the geometric parameter sample points and performing finite element simulation analysis until the convergence stagnates. This application can effectively improve the reliability of SMT packaging.

This invention discloses an optimization design method for lightweight torsion springs used in robots. The method includes the following steps: First, setting design objectives and constraints, with minimizing spring mass as the optimization objective. Constraints include stiffness, maximum stress, torque capacity, and maximum thickness. Then, material selection and topology design are performed, using chromium vanadium steel and designing three sets of symmetrically distributed wave-shaped spring structures. Next, a three-dimensional parametric model is established in a finite element environment, and simulation analysis is conducted to obtain key performance indicators. Further, based on the Latin hypercube sampling method and the Kriging surrogate model, the spring thickness and transition fillet radius are modeled and predicted, and a multi-objective genetic algorithm is used for global optimization to obtain the optimal structural parameters. Finally, physical processing and experimental verification are performed based on the optimization results. This invention can achieve significant weight reduction, reduce stress concentration, and extend service life while ensuring low stiffness and high torque capacity.

This invention belongs to the field of vehicle shape optimization design and discloses a method, system, device, and medium for global optimization design of vehicle aerodynamic shape. The method includes: constructing a parametric model of the vehicle based on free deformation technology; dividing the parametric model into regions and arranging control points in each candidate deformation region; analyzing the drag reduction rate of each candidate deformation region under typical deformation modes to obtain an initial design space; reducing the dimensionality of the design variables in the initial design space using principal component analysis to obtain a dimensionality-reduced design space; constructing a Kriging surrogate model and performing global optimization on the Kriging surrogate model using a genetic algorithm to obtain a preferred region; and applying adjoint optimization to the preferred region to obtain the globally optimal shape design scheme. The technical solution of this invention achieves intelligent and efficient global optimization of complex shapes under given constraints.

The application discloses a kind of complex aviation structure under mixed uncertainty Time-varying reliability analysis method, and its basic flow is as follows: the finite element simulation model of complex aviation structure is established, the examination site is selected and the failure criterion is determined, the finite element simulation model is parameterized, and the response function of complex aviation structure is constructed;Generate training sample set, and establish the multiple Kriging surrogate model of complex aviation structure response function according to training sample set and corresponding structure response, and the KL divergence is combined with limit state surface projection profile method to construct adaptive learning function under mixed uncertainty, and the new training sample is screened to update and enhance Kriging surrogate model;Global accuracy index of multiple Kriging surrogate model is used to adjust multiple surrogate models in the proxy model set, and local accuracy index is used to solve the time-varying reliability result of complex aviation structure under mixed uncertainty.

The application discloses a performance optimization method for a heavy machine tool hydrostatic guide rail system, comprising the following steps: S1. establishing a multi-objective optimization model: determining design variables of the hydrostatic guide rail system X , constructing an optimization objective function F(X) , and establishing an equality constraint based on force and torque balance H(X and an inequality constraint for preventing dry friction G(X) ; S2. constructing a multi-fidelity database: obtaining a high-fidelity data set through high-fidelity numerical model simulation, and obtaining a low-fidelity data set through low-fidelity numerical model simulation with the same calculation logic but a lower grid density; S3. constructing a data fusion prediction model: utilizing the high-fidelity data set and the low-fidelity data set, constructing a collaborative Kriging surrogate model based on an autoregressive structure, and outputting a predicted mean and a predicted variance; S4. generating a candidate solution population; S5. multi-criteria point selection; S6. simulating and updating a Pareto frontier solution set; and S7. repeating steps S3 to S6 until a preset convergence condition or a calculation budget is met, and outputting a final Pareto optimal solution set.

The invention discloses an AK-MCS reliability analysis method based on a dynamic critical reinforcement learning function, and belongs to the field of mechanical equipment structure reliability analysis. According to the method, a DC learning function is provided, and the coupling influence of a sample point prediction value and a prediction variance on the failure probability estimation precision is comprehensively considered through an adaptive weight mechanism. Preferentially selecting sample points with large prediction variance in the exploration stage to quickly improve the global approximation capability of the model; in the refinement stage, a learning function is converted to be dominant by a mean item, the selection weight of sample points near a limit state curved surface is dynamically increased, local fine description of a critical region is enhanced, and a global relative uncertainty index is introduced to realize smooth transition from global exploration to local refinement. According to the method, the problems of excessive iteration and local optimization of a traditional learning function are effectively avoided, the construction efficiency of the Kriging proxy model and the robustness of failure probability estimation are remarkably improved, and the method is suitable for efficient reliability analysis of a complex mechanical equipment structure.

This invention relates to the field of intelligent transportation technology, and provides a method and system for dynamic control of emergency lanes in highway accident scenarios. The method includes: acquiring accident reporting information; using a deep learning network model to predict the accident handling time; based on the accident handling time, using a traffic wave model to predict the queue length and dissipation time under the impact of the accident; using the queue length under the impact of the accident as the total length of the controlled road segment and discretizing it into segments; using the dissipation time under the impact of the accident as the control duration and intervalizing it; constructing a binary control strategy combining time windows and spatial segments; constructing an objective function with the goal of minimizing the weighted average of total travel time and total collision exposure time; solving the objective function using a Kriging surrogate model; and obtaining the dynamic control strategy for the emergency lane based on the binary control strategy. This improves the response speed of accident handling.

The application discloses a three-dimensional asymmetric excitation rotor uncertainty steady-state response analysis method and system, relates to the energy power technology field, and comprises the following steps: a three-dimensional finite element dynamics model of an excitation rotor with an axial slot is established; uncertainty quantification is carried out on the excitation rotor system, and a dynamics model of the excitation rotor system containing interval uncertainty is established; a Latin hypercube sampling method is adopted, and a Kriging surrogate model is used to solve the uncertainty steady-state response; considering the interval uncertainty, a dynamic response decoupling coordinate method is used to suppress false resonance peaks; a fast analysis method of the three-dimensional asymmetric rotor system uncertainty steady-state response is established by combining the Kriging and Latin hypercube sampling method-based surrogate model; and the three-dimensional asymmetric rotor system steady-state response is analyzed; and the method solves the phenomenon that the interval method is prone to false resonance peaks when used for uncertainty analysis of the asymmetric rotor steady-state response.

The invention discloses a capacity optimization configuration method and device for a tractive power supply system and a medium, and relates to the field of capacity optimization configuration, and the method comprises the steps: obtaining original data; according to original data, a source-storage-load power characteristic model is established, according to the source-storage-load power characteristic model, a double-layer optimization configuration model for source-storage collaborative configuration is established, and the double-layer optimization configuration model for source-storage collaborative configuration is solved based on a multi-target dung beetle optimization algorithm improved based on a Kriging agent model and a non-dominated rapid sorting method. According to the method and the device, refined operation management can be realized, and the optimal planning scheme can be quickly obtained with high quality.

The invention discloses a multi-parameter collaborative wind speed optimization method for a spillway tunnel hoist chamber. The method comprises the following steps: determining an optimization variable and an optimization target based on multiple operating parameters; establishing a plurality of groups of flood discharge tunnel operation parameter samples; according to the three-dimensional geometric model of the tunnel spillway, constructing a tunnel spillway full-size three-dimensional numerical model matched with each group of operation parameter samples in the step 2, and determining the computational domain range of the three-dimensional numerical model; working condition coupling is conducted on the determined multiple groups of flood discharge tunnel operation parameter samples and the three-dimensional numerical model, numerical calculation is conducted on the three-dimensional numerical model through the computational fluid dynamics technology, and an operation parameter-hoist chamber wind speed distribution mapping data set is formed; taking each group of flood discharge tunnel operation parameter samples as an optimization variable sample set, taking the maximum wind speed of the hoist room in one-to-one correspondence with each group of flood discharge tunnel operation parameter samples as an optimization target value sample set, constructing a proxy model by adopting a Kriging interpolation method, and performing precision evaluation on the Kriging proxy model by using a cross validation method, if the precision does not reach the standard, returning to the step 2 to increase the sampling points until a Kriging agent model with the precision reaching the standard is formed; and constructing a wind speed optimization model of the flood discharge tunnel hoist room, solving by adopting an intelligent optimization algorithm to obtain multiple groups of optimal solutions, and performing multi-attribute decision on the multiple groups of optimal solutions to screen out an optimal scheme. According to the method, the wind speed optimization scheme can be effectively screened out.

The invention discloses a rapid equivalent analysis method and system for a heat dissipation cold plate based on a Kriging agent model, and belongs to the field of heat dissipation design of electronic equipment, and the method comprises the following steps: obtaining a geometric model of the heat dissipation cold plate, and carrying out grid division and simulation to obtain design points of a grid model of the heat dissipation cold plate; after the key simulation data and the corresponding temperature response values serve as a training set to be normalized, a distance matrix is obtained through calculation, a regression matrix and a correlation matrix are constructed in combination with the key simulation data of the design points, finally, parameters of a Kriging agent model are optimized in combination with boundaries of the key simulation data, and the Kriging agent model is obtained. And obtaining a Kriging agent model for rapid equivalent analysis of the heat dissipation cold plate, and inputting a to-be-tested design point into the Kriging agent model to obtain a predicted temperature response value. According to the method, the processes of geometric modeling, grid division and numerical solution do not need to be carried out again after subsequent parameter adjustment, and the efficiency of equivalent analysis of the heat exchange performance of the heat dissipation cold plate is improved.

The present disclosure relates to a method for analyzing sensitivity of distribution parameter uncertainty of a radome structure, and relates to the field of uncertainty analysis, which comprises: constructing an adaptive Kriging surrogate model based on a first initial training sample set; calculating a total variance value and a first conditional variance value of an output failure probability of a real radome structure model according to the adaptive Kriging surrogate model, and calculating a main sensitivity of the real radome structure model according to the total variance value and the first conditional variance value; calculating a second conditional variance value of the output failure probability according to the adaptive Kriging surrogate model, and calculating a conditional expectation value of the output failure probability according to the second conditional variance value; calculating a total sensitivity of the real radome structure model according to the second conditional variance value and the conditional expectation value, and analyzing the sensitivity of the real radome structure model according to the main sensitivity and the total sensitivity. The present disclosure improves the sensitivity analysis efficiency.

The application provides a full-size subsonic wind tunnel loop aerodynamic profile multi-objective optimization method based on steady CFD, and belongs to the technical field of wind tunnels.The application reduces the initial geometric parameters to a sensitive parameter subspace through principal component analysis, generates initial sample points by using Latin hypercube sampling, extracts response values by executing steady Reynolds average Navier-Stokes equation solving, constructs a Kriging surrogate model, performs multi-start parallel search based on an expected improvement function, extracts a separation zone length and a backflow zone height to input an unsteady correction factor model to calculate a correction coefficient for correcting a diffusion section pressure recovery coefficient, searches a Pareto front solution set by using a non-dominated sorting genetic algorithm, selects an optimal parameter combination through a comprehensive performance index, and reconstructs the wind tunnel loop aerodynamic profile through a hierarchical parameterization method and performs verification calculation, so that the problem that the steady calculation framework cannot accurately predict the separation flow and the optimization result deviates from the true performance is solved.