212 results about "Structural dynamics" patented technology

The invention relates to the technical field of floating fans, in particular to a parameter tuning method suitable for a multi-tuned mass damper of a floating fan, which sequentially comprises the following steps of: establishing a system dynamics model; defining an optimization variable and a constraint range; constructing a comprehensive fitness function; initializing a grey wolf population and algorithm parameters; executing a grey wolf position optimization updating mechanism; setting convergence judgment conditions; and outputting the optimal TMD parameter combination. According to the method, structural dynamic characteristics and an intelligent algorithm strategy are fully fused, particularly, spatial arrangement coordinates of the TMD are brought into an optimization variable domain, collaborative design of tuning parameters and arrangement space is achieved, the method is different from a single-parameter or fixed-point optimization mode, the limitation of artificial experience layout is avoided, overall suppression of structural multi-order modal response is achieved, and the method is suitable for large-scale popularization and application. The damping capacity and the stability margin of the fan structure under wind wave flow coupling excitation are improved, cross-modal and multi-source vibration cooperative treatment is achieved on the system response coordination and control strategy level, and the method has the adaptability to offshore wind power scenes.

The invention belongs to the field of dam flood discharge safety, and provides a dam flood discharge safety protection method and system based on earthquake response analysis, and the method comprises the steps: S1, obtaining multi-source environment and structure data in real time; s2, preprocessing the multi-source environment and structure data to form a unified time sequence multi-dimensional data set; s3, simulating and analyzing the structural dynamic response of the dam and the flood discharge gate based on the unified time sequence multi-dimensional data set, and evaluating potential damage; s4, comprehensive risk assessment is carried out by combining the earthquake response analysis and damage assessment result, the hydro meteorological data and the flood discharge gate operation state data, and early warning information is generated; s5, generating a dynamically adaptive flood discharge gate opening and closing strategy according to the comprehensive risk assessment result and the early warning information; s6, executing the opening and closing strategy of the flood discharge gate, and monitoring the actual operation state of the flood discharge gate in real time; and carrying out comparative analysis on the actual running state of the flood discharge gate and the prediction strategy, and carrying out updating and optimization according to an analysis result.

This invention discloses a method for calculating the vibration response of a delaminated composite laminate, belonging to the field of structural defect calculation and analysis. The method includes: dividing the composite laminate with delamination defects into delaminated and intact regions based on the damage condition; decoupling the delaminated regions dynamically; describing the vibration characteristics of each component in both the delaminated and intact regions using elastic waves based on elastic wave propagation theory, and establishing vibration state vector expressions for each region; determining the compatibility relationship based on the displacement continuity and internal force equilibrium conditions at the coupling point between the delaminated and intact regions, and establishing structural dynamic equilibrium equations in wave space based on the boundary conditions of the composite laminate; solving the structural dynamic equilibrium equations to obtain the amplitudes of elastic waves of each order; and calculating the vibration response of each region of the composite laminate based on elastic wave theory and amplitude calculation. This invention solves the problem of low computational efficiency in existing methods.

The invention relates to the technical field of composite material structure dynamics analysis, and provides a method and system for predicting the inherent frequency of a three-phase functionally graded composite material conical plate, and the method comprises the steps: employing an improved Halpin-Tsai model to calculate the equivalent parameters of a GPL-containing two-phase composite matrix, solving the equivalent parameters of a three-phase composite layer, and calculating the inherent frequency of the three-phase composite material conical plate. The method comprises the following steps: constructing a nonlinear geometrical relationship between a displacement field and a strain field, calculating a stiffness coefficient of each layer, constructing kinetic energy of the three-phase composite material conical plate, calculating an energy coefficient according to the stiffness coefficient of each layer, constructing potential energy of the conical plate according to the energy coefficient, and constructing a modal displacement function by adopting a Chebyshev polynomial and a boundary function. And establishing a characteristic equation based on a minimum potential energy principle and solving to obtain the inherent frequency of the three-phase composite material conical plate. According to the method, efficient calculation of the inherent frequency of the three-phase composite material conical plate is achieved, and the reliability and engineering application value of structural dynamics analysis are remarkably improved.

The invention discloses a dynamic calculation method based on a spectral feature coding network. The dynamic calculation method comprises the following steps: analyzing a structural dynamic equation type and modal parameters corresponding to a dynamic problem to be solved; determining an input variable of the structural dynamic equation, building a spectrum feature coding layer, and mapping the input variable to a spectrum space related to the structural dynamic equation solution; constructing a neural network architecture; constructing a loss function based on physical constraint conditions of the structural dynamic equation; and training the neural network architecture under the constraint of the loss function, and solving the structural dynamic equation to respond to dynamic calculation. The input variable is projected to the structural dynamic equation frequency spectrum space, and the multi-layer perceptron fits the primary function with the clear physical meaning in the space, so that the frequency spectrum deviation problem is effectively solved, the solving precision of the high-frequency structural dynamic equation is improved, the nonlinear fitting complexity of the neural network is reduced, and the neural network performance is improved. The method enables the network to converge rapidly, reduces the number of iterations to improve the solving efficiency, and provides a high-efficiency solving thought for an engineering high-frequency dynamics problem.

The invention discloses a wind tunnel test aerodynamic force and displacement signal phase difference correction method based on self-excited vibration characteristics. The method comprises the following steps: independently collecting structure surface wind pressure and vibration displacement signals; integrating the wind pressure signal to obtain a self-excitation aerodynamic force time history; identifying the vibration frequency and the total damping ratio of the system from the displacement signal; filtering the aerodynamic force time history to extract a fundamental frequency component; based on a structural dynamic balance principle, establishing an analytic relational expression between an aerodynamic force out-of-phase component coefficient and total damping of the system; and carrying out iterative time translation on the aerodynamic force time history by taking the displacement signal as a reference until the out-of-phase component of the aerodynamic force time history meets the analytic relationship, so as to determine and correct the system delay. The invention further discloses a wind tunnel test aerodynamic force and displacement signal phase difference correction system based on the self-excited vibration characteristic and a storage medium. According to the method, electric triggering and physical transmission delay can be compensated with high precision without additional hardware, and the pneumatic parameter identification reliability is effectively improved.

The invention discloses a system-level coupling modeling method, system, equipment and medium for a multi-wind-wheel multi-tower-drum floating type wind turbine generator set, and relates to the field of simulation modeling, and the method comprises the steps that parameter information of the multi-wind-wheel multi-tower-drum floating type wind turbine generator set is obtained, and a multi-system structural dynamics model is obtained based on the parameter information of the multi-wind-wheel multi-tower-drum floating type wind turbine generator set; the unsteady aerodynamic model, the hydrodynamic model and the mooring structure dynamic model are used for outputting aerodynamic loads, hydrodynamic loads and mooring cable tension, the aerodynamic loads, the hydrodynamic loads and the mooring cable tension are fed back to the multi-system structure dynamic model, and based on a Lagrange framework, the models are subjected to joint simulation operation through a joint simulation interface, so that the mooring cable tension is obtained. And the multi-wind-wheel and multi-tower-drum floating type wind turbine generator is designed. According to the method, a complete system dynamics model can be established, and complete machine level rapid evaluation and engineering iteration under multiple working conditions can be supported.

The invention discloses a structural dynamic response method of a physical information radial basis Kolmogorov-Arnold network, and belongs to the technical field of anti-seismic engineering. The method comprises the following steps: acquiring a data supervision range of structural dynamic response under seismic excitation, and acquiring engineering dynamic parameters in the data supervision range in real time according to a timeline; according to the method, the mechanical preciseness of a traditional numerical method is inherited through kinetic equation constraint, and the efficiency and generalization bottlenecks of the traditional method are broken through by means of the self-adaptive learning capability of the RBF network; the analysis limitation of a traditional method under non-stationary seismic excitation is solved, dependence on artificial experience is reduced through an automatic process, and a novel structural dynamic response analysis normal form with precision, reliability and practicability is provided for the field of seismic engineering. And the technology upgrade of the field from empirical driving to data-physical dual driving is promoted.

The embodiment of the invention provides a finite element-based single-working-condition internal force calculation method and a finite element-based single-working-condition internal force calculation system. The method is applied to the technical field of multi-physics field coupling simulation and finite element analysis and comprises the steps that after a single working condition is received, a preset finite element model is input for structural-thermal coupling numerical solution, and strain, temperature and material evolution state data are obtained. And calculating the inherent force of the structure according to the strain-displacement matrix and the heat conduction coefficient. And fluid-structure interaction solution is carried out to obtain a pressure field, a velocity field and frequency response data, and the fluid acting force is calculated. Structural dynamics solution is carried out, acceleration, speed and deformation data are obtained, structural dynamic additional force is calculated, and finally total internal force is obtained. According to the scheme, the stress state of the structure can be comprehensively predicted and accurately evaluated, the accuracy of structure safety analysis is improved, the test cost is saved, and the design optimization and intelligent decision-making capability is improved.

The invention discloses a small sample electric aircraft composite material combined structure dynamics modeling method based on attention element learning. Comprising the following steps: step 1, a used data set comes from vibration experiments performed on a composite material laminated wing box structure, a composite material laminated air beam structure and a composite material conical-cylindrical combined shell under different temperature conditions; under the condition of limited data, various composite material structures and environment temperatures are divided into independent task samples, each task comprises vibration test data of the structure at the respective temperature, and the data are divided into a meta training set and a meta test set; the invention relates to the technical field of dynamic modeling, meta-learning and dynamic modeling of an electric aircraft composite material combined structure are creatively fused together, the AMLT model can utilize the rapid task adaptability and the multi-task learning ability of MAML to rapidly transfer and apply knowledge to a new task, and the modeling efficiency is improved. And the method has higher adaptability and generalization ability when facing new tasks.

The invention discloses an elastic Bragg breakwater structure response prediction method, and belongs to the technical field of ocean engineering structure dynamic response prediction, and the method comprises the steps: obtaining the front and rear wave surface elevation and motion response data of a breakwater; a double-flow attention mechanism based on physical prior guidance is constructed, and wave-structure interaction is decoupled into two parallel attention flows of structural dynamic evolution and wave-structure coupling feedback; a self-attention mechanism is combined with a time decay physical prior coding structure motion feature, and a bidirectional cross attention mechanism based on a resonance characteristic is combined with a wave-structure phase relation physical prior coding coupling feature; the double-flow features are adaptively integrated through a global context fusion module, and a multi-step prediction sequence is output through linear layer decoding; and a time-frequency domain joint loss function optimization model is adopted, so that the prediction precision is improved. According to the method, physical prior is explicitly embedded into an attention mechanism and is improved by more than 16% compared with an optimal baseline model, and the generalization ability is enhanced by more than 13% under the working condition that waves do not appear.

The invention relates to the technical field of data processing, in particular to a structure dynamic stiffness analysis method based on frequency response function polycondensation substructure impedance coupling, which comprises the following steps: acquiring node information, unit connection relation and material attribute based on a global finite element model; defining a focus point set, a boundary point set and an internal point set according to the unit connection relationship; partitioning the global quality matrix, the stiffness matrix and the damping matrix to obtain a partitioned system matrix; introducing an inertia compensation term to construct a transformation matrix based on the block system matrix and the highest analysis frequency of the system, condensing the system matrix until only the freedom degrees of a concern set and a boundary point set are reserved, and calculating a dynamic stiffness matrix in a frequency domain; a dynamic stiffness result of a focus set is extracted through inverse operation of a dynamic stiffness matrix, the calculation scale is remarkably reduced through system matrix condensation, meanwhile, the inertia effect and the stiffness coupling effect of a far-field structure are strictly reserved, and the contradiction between low calculation efficiency of a global model and precision distortion of a local substructure method is effectively solved.

The invention relates to the field of urban rail transit engineering and structural dynamics, and provides an interlayer and strain rate coupled subway tunnel lining dynamic mechanical property evaluation method and system, and the method comprises the following steps: 1, preparing an interlayer-containing cement-based cylindrical sample; step 2, applying strain rate loading, and collecting original data; step 3, reconstructing stress-strain response, and performing criterion of stress balance and constant strain rate; 4, acquiring the energy absorption rate, the dynamic compressive strength and the yield inflection point strain, and recording the failure form type; 5, establishing a statistical damage model and inverting model parameters; step 6, extracting an initial damage coefficient and a damage rate, and establishing an empirical regression formula; and step 7, constructing an evaluation index set, performing grading evaluation, and outputting material optimization and process suggestions. According to the scheme, the design, checking calculation and rapid evaluation capabilities of the subway tunnel lining under high strain rate working conditions such as impact or explosion are remarkably improved.

The invention discloses an icing galloping intensity prediction method based on multi-source correction and physical constraint, relates to the field of meteorological processing, and adopts a correction mechanism of wavelet transform and generative adversarial network cooperation to improve meteorological data precision through a meteorological field multi-scale cooperation correction module; based on an icing physical mechanism, deeply analyzing module structure morphological mechanical characteristics and time sequence dynamic characteristics; calculating terrain interaction characteristics and structural dynamic parameters through a terrain-line coupling response construction module; a physical prior constrained cross-modal preferential fusion module is adopted to realize multi-source feature intelligent fusion; the prediction module based on multi-scale physical guidance performs physical correction and multi-scale output in combination with an energy balance principle; continuous optimization of a prediction result is realized through a prediction efficiency dynamic optimization module; through multi-source data collaborative correction and physical mechanism deep embedding, the problem that a traditional method is insufficient in prediction precision under complex meteorological topographic conditions is solved, and the accuracy and reliability of icing galloping strength prediction are remarkably improved.

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 provides a nonlinear dynamic modeling, solving and control method of a linear motor, and belongs to the field of structural dynamics, and the method comprises the steps: 1) simplifying an LRA into a two-degree-of-freedom mass-spring-damping nonlinear system, and obtaining the linear stiffness and cubic nonlinear stiffness of a beam spring; (2) nBgleff discrete data points of different relative displacements of the motor vibrator and the shell are obtained through simulation, an nBgleff fitting curve is obtained, and then electromagnetic force is obtained; 3) identifying system damping parameters by combining measured data; according to the method, the goodness of fit Rnl of the model to the LRA vibration response is larger than 0.95, vibration characteristics can be accurately predicted, the LRA vibration consistency is effectively improved through the control strategy, and the tactile feedback experience is improved.

This invention discloses a method for correcting the phase difference between aerodynamic and displacement signals in wind tunnel tests based on self-excited vibration characteristics. The method includes: independently acquiring wind pressure and vibration displacement signals from the structural surface; integrating the wind pressure signal to obtain the self-excited aerodynamic time history; identifying the vibration frequency and the total system damping ratio from the displacement signal; filtering the aerodynamic time history to extract the fundamental frequency component; establishing an analytical relationship between the aerodynamic out-of-phase component coefficient and the total system damping based on the structural dynamic equilibrium principle; and iteratively shifting the aerodynamic time history using the displacement signal as a reference until the out-of-phase components satisfy the analytical relationship, thereby determining and correcting the system delay. This invention also discloses a system and storage medium for correcting the phase difference between aerodynamic and displacement signals in wind tunnel tests based on self-excited vibration characteristics. This invention requires no additional hardware and can accurately compensate for electrical triggering and physical transmission delays, effectively improving the reliability of aerodynamic parameter identification.

The invention discloses a proportional valve control method based on high-pressure multi-medium annular gap flow prediction, and relates to the technical field of hydraulic control element dynamic analysis, and the proportional valve control method comprises the following steps: collecting a real-time state signal of a micro proportional valve; inputting the collected real-time state signal into a multiphase flow transient coupling equation, calculating a velocity field and a pressure field in the micro proportional valve, and correcting the velocity field; calculating gas phase distribution according to the corrected velocity field and the real-time state signal; calculating a transient fluid load according to the gas phase distribution and the pressure field; inputting the transient fluid load into a structural kinetic equation of the micro proportional valve, and calculating the structural displacement of the micro proportional valve; calculating an opening compensation value according to the structural displacement, and converting the opening compensation value into PWM duty ratio correction; and generating a proportional valve control instruction according to the PWM duty ratio correction. Efficient and accurate prediction of the flow characteristics under the high-pressure complex working condition is achieved, and therefore the proportional valve is accurately controlled.

The invention discloses a high-precision modal test method and related equipment, and belongs to the technical field of structural dynamics tests.The method comprises the steps that spring design parameters are obtained, and spring design variables are initialized and generated; calculating stress field characteristic parameters based on the spring design parameters and the spring design variables; evaluating stress field characteristic parameters based on preset stress field constraint conditions; under the condition that the stress field characteristic parameters meet the stress field constraint conditions, spring design variables are output to serve as spring design results; and preparing a spring based on a spring design result, and completing a modal test. According to the method, the stress field quantification constraint condition is introduced in the modal test instrument spring design stage, the characteristic parameters of the modal test instrument spring are evaluated, the modal test instrument spring design precision and reliability can be effectively improved, the spring design iteration period is remarkably shortened, the modal test precision and stability are improved, and the modal test efficiency is improved. And the design requirement of the high-reliability spring is effectively met.

The application relates to the technical field of wind power generation, and discloses a wind turbine design method adopting a frictional tuned mass damper, which adds a frictional tuned mass damper to a man platform in a tower drum of a wind turbine, establishes a motion equation of the wind turbine after adding the frictional tuned mass damper based on a structural dynamics principle, deduces a mathematical analytic expression of a system dynamic coefficient, and obtains parameters of the frictional tuned mass damper through a system optimization theory. The application solves the problems that the prior art is difficult to realize damping through the tuned mass damper in the narrow space in the cabin or the tower drum, and the damping control effect is poor.

The present application relates to a kind of offshore wind power foundation scour protection method and system, belong to offshore wind power protection technical field.It includes the following steps: by multibeam bathymetric sonar array and vibration sensor array, real-time acquisition offshore wind power single pile foundation surrounding seabed elevation field and pile vibration response frequency;Based on seabed elevation field, calculate scour depth, scour expansion rate, combined with the change of pile vibration response frequency, obtain the residual bearing capacity of pile foundation by structural dynamic inversion model;Then according to the scour depth and residual bearing capacity, construct double-parameter risk judgment criterion, divide stable state, development state, dangerous state three grades of scour risk level;Then according to the risk level, execute adaptive protection strategy, stable state maintains routine monitoring, development state puts flexible spoiler unit, dangerous state implements targeted grouting;Finally, verify the protection effect, upgrade protection level if invalid, effective then continue to monitor circulation.The present application can improve the accuracy and efficiency of scour protection.

The invention discloses a dynamic calculation method and device considering wave current-pipeline-seabed coupling and a medium, and belongs to the technical field of dynamic calculation. The method comprises the steps that geometric features and material parameters are defined, and a calculation model is established; the fluid-solid coupling equation and the structural dynamics model are jointly calculated through a CFD solver; starting and stopping of seabed scouring are judged according to the scouring shear stress of fluid to the seabed, the seabed elevation of a scoured area is updated, the gradient of the scoured area is calculated and compared with a silt repose angle, and collapse control and smoothing are conducted on the local gradient of the seabed through comparison; and after seabed local slope collapse control and smoothing are completed, structural vibration response is solved according to the lift force and the drag force of the fluid on the pipeline structure. According to the method, in the synchronous dynamic process of waves, seabed evolution and pipeline vibration, local scour depth evolution and pipeline vibration amplitude can be predicted at the same time, and motion response time histories such as pipeline displacement, speed and stress are stably output.

This invention discloses a method for calculating the vibration response of a delaminated composite laminate, belonging to the field of structural defect calculation and analysis. The method includes: dividing the composite laminate with delamination defects into delaminated and intact regions based on the damage condition; decoupling the delaminated regions dynamically; describing the vibration characteristics of each component in both the delaminated and intact regions using elastic waves based on elastic wave propagation theory, and establishing vibration state vector expressions for each region; determining the compatibility relationship based on the displacement continuity and internal force equilibrium conditions at the coupling point between the delaminated and intact regions, and establishing structural dynamic equilibrium equations in wave space based on the boundary conditions of the composite laminate; solving the structural dynamic equilibrium equations to obtain the amplitudes of elastic waves of each order; and calculating the vibration response of each region of the composite laminate based on elastic wave theory and amplitude calculation. This invention solves the problem of low computational efficiency in existing methods.

The application provides a wind turbine tower structure dynamics response calculation method, and belongs to the field of wind turbine tower design, and comprises the following steps: model establishment, tower model establishment and node setting on the top of the tower model, wind wheel-cabin equivalent model establishment on the top of the tower model, determination of pressure on the wind wheel-cabin equivalent model plane, determination of the first tower top shear force vector and the first tower top bending moment vector when the wind wheel variable pitch variable speed control is performed according to the turbulent wind environment; determination of displacement vector, velocity vector and acceleration vector, determination of tower top load in each time period, then update of the kinematic response of blades, cabins and hubs at the next time point, and determination of tower top load at the next time step. The application establishes a wind turbine tower seismic structure dynamics model, performs data transmission of tower top motion and load on the top of the tower, realizes coupling of wind load and seismic load, and makes the calculation more in line with the seismic region.

According to the real bridge steady-state resonance damper effect evaluation method and device and the readable storage medium, technical means such as excitation and sensing optimization, input reconstruction, closed-loop control, parameter identification, contribution decomposition and multi-path checking are systematically fused; the problems that an existing method is low in signal-to-noise ratio, high in model dependence, complex in calculation, difficult to maintain a resonance state, poor in evaluation result reliability and the like are effectively solved, and the method has higher recognition precision and reproduction practicability in a thousand-grade damping real bridge scene, is not sensitive to frequency drift and interface installation, and is easy to implement. The energy source of damping improvement can be defined, the interface amplitude sensitive energy consumption characteristic can be quantified, real bridge traceable reliable data support is provided for damper model selection, parameter optimization and pavement interface process review, and the requirements for efficient, stable and high-precision evaluation of the effect of the real bridge damper in the technical field of civil engineering structural dynamics and tests are met.

The invention discloses a physical guidance neural network-based building dynamic response reconstruction method and system. The method comprises the steps of actually measuring the displacement and acceleration of a seismic isolation layer based on a sensor arranged on the seismic isolation layer of a high-rise building; inputting the actually measured acceleration of the seismic isolation layer into a physical guidance dynamic response prediction model, and predicting the displacement, speed and acceleration response of the reconstructed seismic isolation layer and each floor; the dynamic response prediction model comprises a neural network part, a physical constraint module and a data constraint module; the physical constraint module is composed of a structural dynamics control equation of the high-rise building, the neural network part is constructed based on wavelet convolution and a gating circulation unit, and the structural dynamics control equation is used for constraining structural dynamics characteristic parameters output by the neural network; and the data constraint module utilizes actually measured displacement and acceleration as supervision labels to constrain prediction reconstruction data of the dynamic response prediction model. The utilization rate of the sensor can be reduced, and resources are saved.

This invention belongs to the field of structural dynamics testing and modal analysis technology, and provides a physical / mathematical integrated experimental modal analysis method, system, equipment, and medium. The method includes: applying preliminary excitation and using the phase separation method to obtain preliminary modal parameters containing mode shapes; constructing a mode shape matrix based on the mode shapes and optimizing the position and number of exciters to ensure that the modal participation values ​​of all modes of interest are not lower than a preset threshold; performing refined excitation according to the optimized scheme, locking the resonance state using the phase resonance method, and obtaining the final modal parameters. This invention effectively solves the problems of blind excitation point placement, modal confusion, and mode omission by coordinating three stages: phase separation initial screening, mode shape-driven excitation optimization, and phase resonance fine measurement. It significantly improves the integrity, accuracy, and efficiency of modal testing of large structures and reduces experimental safety risks. It is applicable to ground vibration tests of complex structures such as aircraft, spacecraft, and bridges.

The invention relates to a bridge-crossing type label-domain-free adaptive damage identification method, which belongs to the technical field of bridge structure health monitoring and comprises the following steps of: 1, constructing a three-tower type feature extractor comprising a time domain tower, a frequency domain tower and a modal tower to obtain a cross-modal combined feature; 2, aligning with a modal map through modal consistency constraint; 3, utilizing a multi-scale and dynamic frequency band attention mechanism to adaptively highlight a damage sensitive frequency band; 4, confrontation and cooperation mixed alignment is adopted, feature distribution differences are reduced, and modal physical consistency is kept; 5, a self-training and multi-teacher distillation mechanism guided by modal confidence is designed under the non-labeling condition, and the pseudo label quality and the training stability are improved; and 6, introducing physical constraint regularization to ensure that a result accords with a structural dynamics rule. According to the method, the damage probability distribution, the modal similarity heat map and the reliability index are finally output, target domain labeling is not needed, and the accuracy, the robustness and the engineering applicability of cross-bridge damage identification can be improved.

This invention provides a dynamic management method and system for multi-level assessment indicators of the resilience of nearshore bridges throughout their entire life cycle, relating to the field of structural resilience assessment and management technology. The method includes: acquiring multi-source heterogeneous maintenance data streams throughout the entire life cycle of the nearshore bridge; processing these data streams through time-series alignment and feature dimensionality reduction mapping to obtain a basic feature matrix of the bridge's service status; and performing conditional routing and data stream processing based on this basic feature matrix to obtain corrosion evolution calculation potential field distribution data, structural dynamic stiffness attenuation tensor, and structural life-cycle degradation confidence distribution vector. This invention accurately obtains resilience indices that truly reflect the bridge's resistance to degradation through multi-step quantification calculations, clarifies the sensitivity differences of assessment nodes, formulates differentiated dynamic maintenance strategies, and constructs a closed-loop management system throughout the entire process, thereby achieving intelligent bridge maintenance, improving maintenance efficiency, and reducing costs.

The invention discloses a case vibration analysis and test method, system, equipment and medium, and the method comprises the steps: obtaining three-dimensional geometric data of a to-be-detected case, constructing a three-dimensional geometric model, analyzing the three-dimensional geometric model, and extracting component information and geometric topology information; calling a preset material database to distribute corresponding material physical parameters for each component of the three-dimensional geometric model, generating test working condition setting data, calling a built-in solver according to the material physical parameters and geometric topological information of the components and the test working condition setting data, and performing structural dynamics simulation calculation to obtain a structural dynamics simulation result. The structural dynamics equation is solved to obtain simulation response data of the to-be-detected case, a vibration response map is generated according to the simulation response data, a model optimization suggestion is generated, full-process automatic testing of the vibration resistance of the case is achieved, and the method has the advantages of being high in testing precision, high in flexibility and rapid in optimization.