199 results about "Structural load" patented technology

The invention discloses a wind turbine blade semi-coupling aeroelastic modeling method considering nonlinear deformation, and belongs to the technical field of fan simulation calculation. In combination with calculation parameters used by three-party software, establishing a blade structured load model and a blade correction aerodynamic model, calculating an aerodynamic load and a structural load, and superposing: superposing the aerodynamic load, the gravity load and the centrifugal force load of the blade as an external load of a nonlinear structure control equation of the blade, and taking the external load as a calculation parameter; according to the method, the blade nonlinear structure model and the semi-coupling simulation process of the three-party wind turbine simulation software are constructed, and under the same simulation environment and load conditions, the blade nonlinear structure model and the three-party wind turbine simulation software can be subjected to semi-coupling simulation, so that the blade nonlinear structure model and the three-party wind turbine simulation software can be subjected to semi-coupling simulation calculation. The higher-precision non-linear motion response characteristics of the super-long flexible wind turbine blade are calculated, and a good effect can be achieved in the aspects of initial structure design and response evaluation of the large wind turbine blade.

Aircraft high-load landing event detection, classification and maintenance guidance methods relate to the technical field of aircraft high-load landing event detection. The aircraft high-load landing event detection method collects complete and accurate landing data online during an aircraft landing process and performs an analysis and calculation to determine whether a high-load landing event occurred and determines the type of the high-load landing event. The aircraft high-load landing event detection method removes the high-load landing event determination from the pilot's subjective perception and does not need to wait for decoding of quick access recorder (QAR) data, greatly improving the accuracy and timeliness of high-load landing event detection. In addition, by analyzing and estimating structural loads of the aircraft, the aircraft high-load landing event detection method provides targeted maintenance recommendations for possible aircraft structural damage caused by the high-load landing event, and forms a corresponding report.

The invention provides a prefabricated height-adjustable support system for a swivel bridge and a construction method. The system comprises an embedded base, a lower support plate, a height-adjustable core module, an upper support plate and a locking device. The pre-embedded base is of a reinforced concrete structure, the pre-embedded base and a side pier cover beam are cast and formed at the same time before swivel construction, and an anchoring part used for subsequent connection is pre-embedded in the top of the pre-embedded base; the lower support plate is fixedly mounted on the embedded base through the anchoring part; the height-adjustable core module is arranged on the lower support plate, is used for bearing and transmitting an upper structure load and can realize stepless height adjustment in the vertical direction; the upper support plate is supported on the height-adjustable core module, and the top of the upper support plate is used for making contact with a beam bottom embedded part of a swivel beam and transmitting loads. The locking device comprises a temporary locking mechanism and a final locking mechanism. The construction safety and efficiency are remarkably improved, and it is ensured that the stress state of the structure is highly matched with the design.

The invention discloses a multi-mode Internet of Things monitoring and early warning system for old building structure cracks, the multi-mode Internet of Things monitoring and early warning system comprises sensor nodes, an edge gateway and a cloud platform, the sensor nodes comprise a temperature sensor, a humidity sensor, a vibration sensor and a displacement sensor, the data acquisition module is used for periodically acquiring crack width change and temperature, humidity and vibration data around a crack; the edge gateway is used for receiving the sensor data and executing local calculation according to the sensor data, the local calculation comprises calculating the pressure-bearing stress of the crack, calculating an environment comprehensive influence coefficient and calculating a crack risk comprehensive index, and the cloud platform is used for receiving the calculation data of the edge gateway and executing risk judgment according to the crack risk comprehensive index. According to the method, the multi-factor monitoring process of the building structure crack is realized by fusing the crack size, the environmental parameters and the structural load data in real time, and the crack risk level can be evaluated more accurately by dynamically correcting the pressure-bearing stress and environmental coupling effect.

The invention relates to the technical field of wind power generation control, in particular to a variable pitch control method and system for a wind generating set, and the method comprises the steps: firstly obtaining a real-time operation data set which comprises a set state data unit and an environment parameter data unit and is provided with a timestamp mark, and carrying out the feature fusion processing of the real-time operation data set; a combined feature set reflecting the incidence relation between the blade stress state and the wind regime change is obtained, then a pre-trained pitch angle prediction model is called to predict the pitch angle adjustment amount of the combined feature set, and target pitch angle control parameters meeting the power generation efficiency and structural load balance are determined according to the prediction result; and finally, generating a variable pitch execution instruction containing timestamp alignment based on the target pitch angle control parameter, and sending the variable pitch execution instruction to a variable pitch control system, so that the pitch angle adjustment amount can be accurately predicted, the balance between the power generation efficiency and the structural load is realized, and the operation performance and reliability of the wind generating set are improved.

The present invention relates to a floor reinforcement construction method for old building renovation. While preserving the original appearance of exterior walls, the interior floors of a building can be demolished and reconstructed, interior walls are completely demolished, and a pile foundation, frame columns and frame beams are newly added to form a support frame system, thereby completing the conversion of a load-bearing system, and solving the problem of most conventional masonry structure construction methods not changing a structural load-bearing system of a building. The method of the present invention prolongs the service life of a building, and reduces the cost of demolition and reconstruction; besides, by means of optimizing a construction process, the construction period is shortened, and the efficiency and safety of the construction process are ensured. The method has wide application prospects.

The invention discloses a wall surface falling risk assessment method, device and equipment and a storage medium, and relates to the technical field of building safety assessment, and the method comprises the steps: calculating a wall surface initial resistance value based on outer wall hyperspectral image data and a regression prediction model; calculating wall surface structure resistance according to the wall surface initial resistance value and a reduction coefficient corresponding to the wall surface initial resistance value, wherein the reduction coefficient is used for representing the inherent defect of the outer wall; simulating a structural load borne by the wall surface structure through a finite element agent model based on machine learning; and based on the structure load and the wall surface structure resistance, the wall surface falling risk probability is calculated through a Monte Carlo numerical simulation method by applying the structure reliability theory. The hyperspectral image can comprehensively capture the defect characteristics of the outer wall, and the initial resistance value is quantified by combining the regression model to supplement the traditional detection blind area. The reduction coefficient is used for associating inherent defects, the finite element agent model dynamically predicts the load to quantify the dynamic environment influence, and the comprehensiveness of wall falling risk identification is improved.

The invention provides a friction stir tunnel forming device and method for enhancing bearing performance, relates to the field of machining and inner flow channel forming, and aims to overcome the defects of an inner flow channel prepared through an existing friction stir tunnel forming technology in the aspects of structural bearing and fatigue performance. The non-rotating part is of a hollow structure, the rotating part is coaxially arranged in the non-rotating part, the non-rotating part comprises a clamping part, a step part and a shaft shoulder part, the bottom of the shaft shoulder part is provided with a reinforcing rib manufacturing part, the reinforcing rib manufacturing part is used for containing an inner runner surface material and providing forging pressure, and an inner runner surface with a reinforcing rib structure is manufactured. And a rounded rectangular inner flow channel is manufactured at the stirring needle part of the rotating part, so that the bearing efficiency and rigidity of the rotating part in an aerodynamic load and vibration environment are remarkably improved. And through different sections of the stirring needle part, the manufacturing requirements of the aerospace field on the lightweight and integrated heat management structure in the aspects of complex forms and multifunctional integration can be met.

The utility model discloses a combined device supported by a unilateral formwork, which comprises a unilateral formwork system, a unilateral support system, an embedded part system and a support system, the unilateral support system is provided with an embedded part limiting support, and the embedded part system comprises a ground embedded rod, a connecting nut, an external connecting limiting rod, beam pressing section steel and a fixing part. The pressing beam profile steel is located on the upper side of the embedded part limiting support, and the top end of the externally-connected limiting rod penetrates through a reserved seam between the two pieces of pressing beam profile steel and is anchored through a fixing part connected to the surfaces of the pressing beam profile steel in a pressed mode. The support system comprises a ground support rod, a horizontal support rod and a support vertical buried rod, the front end of the ground support rod is supported at the far end of the right triangle frame, the rear end of the ground support rod is supported at the front side of the horizontal support rod, and the bottom of the support vertical buried rod is buried in the ground. A force transmission system is clear, structural loads are transmitted through the reliable force transmission system through reasonable connection and anchoring, the forming effect is good, repeated turnover use can be achieved, erecting and disassembling are convenient and fast, and labor cost is saved.

A modular rack system designed to be configurable for hauling various sizes and shapes of gear. The geometry of the rails in combination with corner supports allow components to be added or removed easily. Structural connection to the vehicle bed with or without a tonneau cover provides for offroad or heavy duty use. The rack is designed to fit within the aerodynamic profile of the vehicle to minimize its footprint when not in use. The lightweight construction, bracketry and vehicle connections allow the rack system to be removed from the vehicle without disassembly. When combined with a structural load carrying tonneau cover, gear can be supported by the cover aiding the load carrying capacity of the rack system. Height adjustment of the rack system provides clearance with the vehicle when carrying longer items.

The invention is suitable for the field of predictive life calculation of aeronautical equipment, and provides a real-time high-precision structural finite element analysis method based on a reduced-order model, which is used for carrying out life calculation under structural load monitoring based on life parts of an airframe. According to structural load monitoring, airborne real-time data flow, an after-flight parameter data file and test bed data collected by a sensor serve as input, import and'decoding ', and calculation of structural load monitoring is carried out through a maintenance twin modeling and maintenance decision calculation software platform driving operation model based on a reduced-order model. Carrying out finite element load monitoring data and residual life calculation on parts with life on the machine body; the method sequentially comprises the steps of data processing, stress-strain calculation, rain flow counting, material attribute calculation and stress / strain fatigue calculation.

The invention relates to the technical field of wind turbine generators, and discloses an active wake flow yaw regulation and control method and device considering fatigue damage of a wind turbine generator. A wake flow yaw optimization model is constructed by combining wind conditions, unit coordinates and operating parameters with an engineering wake flow model, and it is ensured that wake flow evaluation fits the actual working condition; the fatigue damage of the unit is accurately quantified by calculating the structural load and the target damage equivalent load, so that the yaw limiting angle is determined, and the damage is prevented from being intensified due to excessive yaw in the regulation and control process; a multi-target yaw optimization method for balancing generating capacity and fatigue damage is adopted for iterative solution to obtain a field-level yaw control matrix, damage deterioration caused by the fact that an old strategy is still used after fatigue of a unit is increased is avoided, long-term safe and efficient operation of the wind power plant is finally guaranteed, and the dual targets of long-term safe operation and efficient power generation of the wind power plant are achieved. And the dual requirements of the wind power plant on the operation safety and the economical efficiency in the whole life cycle are practically met.

The present invention discloses a method for screening critical structural loads, comprising the following steps: S1. Obtaining result data for load operating points: Calculating all load conditions using an engineering method or a Gfem model to obtain load operating points and the results of the load operating point calculations; S2. Obtaining the structural loads of the structure under investigation at the load operating points: For the structure to be investigated, obtaining the structural loads from the calculation results in step S1, and determining values for bending, shear, torsion, and other structural loads based on actual conditions. The present invention forms a closed convex polygon based on the load data points. According to the properties of convex polygons, points within the convex polygon (including remaining vertices) are all located on the same side of the extension line of any side thereof. Based on the combined envelope, the critical load design condition can be ultimately selected, ensuring that severe load conditions are not omitted.

The heavy steel beam rooting structure comprises a beam clamp unit and a rooting cross arm, the beam clamp unit comprises pressing plates and a large bottom plate, the pressing plates are connected with the large bottom plate, the pressing plates and the large bottom plate are located on the two sides of the rooting cross arm respectively, and the two pressing plates are pressed on the two sides of a steel beam flange respectively; and a base for bearing a load is mounted on the large bottom plate. According to the heavy steel beam rooting structure, after a load is transmitted to the base through the channel steel vertical rods, a bidirectional mechanical path is formed under the action of the beam clamp units, the longitudinal load is evenly diffused to the steel beam flange along the plane of the large bottom plate, and efficient bearing is achieved through the overall rigidity of the steel beam; when the large bottom plate is loaded and bent, the displacement direction of the connecting rods is restrained through the preset holes, the connecting rods are induced to generate an outward expansion trend through geometric deformation, and meanwhile the connecting rods at the pressing plates are driven to form an inward compression trend, so that the pressing force of the pressing plates on the steel beam flanges is increased, transverse self-locking reinforcement is achieved, and sliding and loosening are effectively prevented.

The invention relates to a textured flexible pipe vortex-induced vibration suppression device based on auxiliary rod TMD control, and the textured flexible pipe vortex-induced vibration suppression device comprises an inner-layer force bearing pipe body, a rubber layer wrapping the outer surface of the inner-layer force bearing pipe body, a textured structure arranged on the outer surface of the rubber layer, and a suppression assembly arranged on the outer side of the rubber layer, the textured structure is used for disturbing a flow field to inhibit vortex generation; the passive TMD mechanism is formed by the auxiliary control rods evenly distributed in the circumferential direction, the springs with optimized parameters and the damping system, out-of-phase response can be generated when a main structure vibrates, vibration kinetic energy is rapidly absorbed and dissipated, particularly, the excellent vibration reduction performance is shown in a resonance area, the vibration amplitude and the fatigue damage accumulation rate of the flexible pipe are greatly reduced, and the mechanical performance of the flexible pipe is improved. Meanwhile, the textured structure is arranged on the surface of the rubber layer, the development process of a fluid boundary layer can be effectively disturbed, periodic falling of vortexes is destroyed, and the lift pulsation amplitude is remarkably reduced.

The present invention discloses a method for determining the equivalent pretension of cables. The method is based on nonlinear implicit equation construction and the Steffensen iteration method. Under the condition that the structural load and support state are known, the cable force value under the load state is targeted. Considering geometric nonlinear effects, the problem of determining the equivalent pretension of cables is transformed into the problem of solving multiple relatively independent nonlinear implicit equations. An iterative formula for the equivalent pretension is constructed based on the principle of the Steffensen iteration method. A set of equivalent pretensions of cables with a cable force error within an allowable error range is obtained through cyclic iterative solutions. This method has a small number of iterations, a short solution time, and has a convergence efficiency of second order or higher, high applicability, outstanding computational efficiency, and stability. It is widely applicable to the problem of determining the equivalent pretension of cables in various prestressed structures.

The invention provides a karst tunnel cavity self-adaptive filling method and system, and relates to the field of tunnel construction intellectualization. Constructing a three-dimensional geologic model of the karst tunnel cavity; according to the cavity filler performance demand matrix, the cavity geometrical morphology, the geological condition, the tunnel structure load condition and the engineering demand, a dynamic mapping relation model between the foam light soil performance parameters and the raw material proportion under the multi-target constraint is established, and a foam light soil proportion scheme is calculated according to the dynamic mapping relation model; a cavity grouting filling scheme is generated according to different working condition requirements, so that a grouting hole site sequence, a diffusion radius, a grouting path, a filling mode, a flow parameter, a pressure parameter and a vibration parameter are dynamically optimized, regulated and controlled on a construction site according to the cavity grouting filling scheme. The intelligent degree, the reliability, the economical efficiency and the environmental protection level of karst tunnel cavity treatment are remarkably improved.

The invention discloses a structural load prediction method, device and equipment and a computer readable storage medium, and relates to the technical field of wind power, and the method comprises the steps: obtaining geometric parameters and material attribute parameters of a to-be-predicted fan structure, and an environment parameter feature range of an environment where the to-be-predicted fan structure is located; constructing a multi-physics field coupling model according to the geometric parameters, the material attribute parameters and the environmental parameter characteristic range; the multi-physics field coupling model comprises a temperature field module, a structural mechanical field module, an airflow field module and a particle impact field module, and the physics field modules perform bidirectional data exchange through coupling interfaces to simulate interaction among the physics fields; acquiring an environmental parameter value of the to-be-predicted fan structure under the target working condition; inputting the environmental parameter values into a multi-physics field coupling model to obtain mechanical response data of the to-be-predicted fan structure under the target working condition; and determining predicted load data of the to-be-predicted fan structure according to the mechanical response data.

The invention discloses an underwater robot depth and course control system, which relates to the technical field of underwater robots, and is characterized in that an equivalent strain energy anomaly index and a local maximum principal stress anomaly index are extracted through a structure-heat-fluid coupled three-dimensional finite element simulation model, and a failure risk prediction model is constructed by using a machine learning model; taking the comprehensive feature vector as input, and outputting a sealing structure failure prediction coefficient as a basis for dynamically adjusting a control strategy; the system limits or optimizes the propeller power, buoyancy adjusting frequency and course angle change rate in real time according to the failure prediction coefficient of the sealing structure so as to reduce the structural load and delay the fatigue process, a prediction model is continuously optimized through an error sample driven incremental learning mode, closed-loop self-learning and self-adaptive evolution of the control system are achieved, and the system reliability is improved. Therefore, the operation safety and the task execution stability of the underwater robot in the complex deep sea environment are improved.

The invention discloses a rigid-elastic coupling flight simulation platform of a large flexible aircraft and a control method of the rigid-elastic coupling flight simulation platform. The rigid-elastic coupling flight simulation platform comprises an upper motion platform, a lower fixed base, six electric servo actuators forming a parallel structure, a control system and a main controller. The method is characterized in that hinge points of six actuators on a lower fixed base adopt a non-concyclic optimized layout, the distance between the hinge points in the pitching axis direction of the platform is remarkably increased, a base geometric configuration longer in the longitudinal direction is formed, then the platform is embedded into an advanced rigid-elastic coupling flight mechanical model, and the model is a three-dimensional model. According to the method, effective verification of key flight events which are difficult to accurately simulate by a traditional six-degree-of-freedom platform can be realized, such as wing flutter boundary exploration of a large-flexibility aircraft, structural load coupling analysis under large maneuver, flight control law performance evaluation under rigid-elastic coupling influence and the like. Physical motion of the simulation platform can accurately reproduce complex dynamic characteristics predicted by the model, so that credibility and engineering application value of flutter simulation results are greatly improved.

The present invention relates to a method for controlling the angles of attack of wind turbine blades, based on a linear model of the wind turbine using a parameter indicative of the acceleration of the wind turbine tower, the linear model being constant across the entire wind turbine operating range. The invention further relates to processing means configured to execute the model-based predictive control. The invention further relates to a method for controlling the position of a moving mass coupled to the wind turbine, based on a linear model of the wind turbine using a parameter indicative of the acceleration of the wind turbine tower and a parameter indicative of the position of the moving mass, the linear model being constant across the entire wind turbine operating range.

The invention discloses a superposed beam hanging basket structure stress checking calculation method based on multi-working-condition load combination, and belongs to the technical field of bridge construction safety monitoring. According to the method, a beam element finite element model based on the actual geometric dimension and the connection relation is established, and the boundary conditions of hinge constraint or spring unit constraint and lateral displacement limitation are set; load parameters including dead load, live load and wind load are defined, a multi-working-condition load combination is set according to building structure load specifications, and the structural safety is judged by comparing strength and deflection after calculation. The method is mainly used for solving the problem of inaccurate stress evaluation caused by single load working condition and simplified boundary condition in the traditional hanging basket checking calculation, and provides more reliable safety guarantee for the construction of the hanging basket of the composite beam bridge.

This utility model discloses an installation structure for a sunroom, relating to the field of building structure technology. It includes a base, with a top column fixedly connected to the top of the base. A roof structure is installed at the top of the top column. The roof structure includes a first connecting beam fixedly installed on one side of the top column. A first horizontal beam is fixedly connected to one end of the top column, and a first inclined beam is fixedly connected to the top of the top column. A top structure is fixedly connected to the top of the first inclined beam. This utility model, through the design of the support components and the top structure, uses a support component consisting of a first support member, a connecting block, and a fifth connecting member, vertically connecting the first and second horizontal beams. This evenly transfers the roof load to the base, significantly improving the bending resistance of large-span roofs and solving the problem of insufficient structural load-bearing capacity preventing the use of large-span structures. The design of the support components and the top structure makes this sunroom suitable for building large-span sunrooms.

This application provides a structure and installation method for a thermal bridge-free connection node for building exterior walls, belonging to the technical field of thermal bridge connection structures for building exterior walls. It includes a precast wall, with the outer side of the precast wall being the indoor side and the inner side being the outdoor side, and a thermal inertia matching layer disposed on the inner side of the insulation board. This structure and installation method for a thermal bridge-free connection node for building exterior walls solves the defects of traditional exterior wall joints, such as significant thermal bridging effects at the connectors, thermal stress cracking at the interfaces of different materials due to abrupt changes in thermal conductivity, and the difficulty in balancing mechanical connection and thermal performance, by placing the thermal inertia matching layer between the insulation board and the cement backing board. It achieves the goal of completely blocking heat conduction along the axial direction of the connector while meeting structural load-bearing requirements, and ensuring smooth heat flow transition between structural layers, significantly improving the energy-saving performance and long-term stability of the exterior wall insulation system.

The present invention discloses a typhoon-resistant soft cut-out method and system for offshore wind turbines with control parameter planning. The method adopts a hierarchical control framework, including a controller and a planner. The planner consists of a soft cut-out reference curve and a nonlinear model prediction algorithm, which is used to give control parameters to the controller. The reference curve maintains a rated value below the cut-out wind speed, and follows a hyperbolic attenuation law after exceeding the cut-out wind speed. As the wind speed increases, the wind rotor speed and the power generation reference value are gradually reduced, thereby extending the actual shutdown wind speed of the offshore wind turbine. The nonlinear model prediction algorithm compensates the reference value according to the control target. The method of the present invention can reduce the structural load of the offshore wind turbine and increase the power generation under high wind speed conditions, effectively ensure the reliability and safety of the operation of the offshore wind turbine, reduce costs and increase efficiency, and has important engineering application value.

The present application relates to a kind of reinforced concrete structure model construction method, device and medium, wherein the method comprises: according to the geometric parameter of bridge basic structure to establish first finite element model;According to the material constitutive relation of bridge structure obtained from reinforced concrete structure tensile test;Determine the first crack width calculation formula based on the section model construction of fiber beam column unit;Material constitutive relation and the first crack width calculation formula are embedded in first finite element model;Input structure load action, utilize first finite element model to obtain structure performance degradation parameter and structure crack parameter;The present application realizes the technology of more accurate reinforced concrete structure simulation based on fiber beam column unit, solves the technical problem that reinforced concrete structure is difficult to simulate steel crack.

The invention relates to the technical field of damping of hoisting machinery structures, in particular to a self-adaptive damping system of a tower crane driven by tension of a hoisting steel wire rope, which comprises a swing base mounted on a balance arm, an arc track assembly is arranged on the swing base, and a movable mass block assembly is arranged in the arc track assembly. A tension actuating mechanism is connected between the lifting steel wire rope and the swing base, and a damping mechanism is hinged between the balance arm and the mass block assembly. The posture switching of the swing base is automatically driven by the tension of the lifting steel wire rope, an additional power source is not needed, and the response is quick; the arc track assembly replaces a traditional long simple pendulum with an arc structure, and the problem that the vertical installation space of the tower crane is limited is solved. The mass block assembly has the balance arm counterweight effect and the static balance and dynamic vibration reduction functions, and the structural load and cost are reduced; the damping mechanism efficiently dissipates vibration energy, self-adaptive vibration reduction is cooperatively achieved, and the dangerous bending moment and amplitude of the tower body are effectively reduced.

The invention discloses an assemblable prestress assembly type foundation adaptive to 220kV transformer substation HGIS equipment, and relates to the field of foundation construction. The assemblable prestress assembly type foundation comprises a split type box body and a cover plate which are detachably connected; the split type box body is formed by splicing a plurality of unit box bodies along the butt joint surfaces through spring hasp locks; each unit box body is of a latticed frame structure integrally formed by longitudinal walls, transverse walls, longitudinal ribs and transverse ribs. Rectangular holes are formed in the longitudinal walls, the transverse walls, the longitudinal ribs and the transverse ribs; and the edges of the rectangular holes are subjected to fillet treatment. A multi-direction stress supporting system is formed through the side walls, the transverse walls and the longitudinal and transverse ribs which are integrally designed, it is ensured that pre-stress can be evenly and effectively transmitted to the whole foundation section, and the capacity of the foundation for resisting bending moment generated by loads of an upper structure is further enhanced.

A computer vision-based system provides for load distribution estimation and load rating and vibration serviceability assessment of structures. The system integrates evaluates the structural load carrying capacity, the diagnosis and prognosis of performance and safety, and vibration serviceability. Cameras record images of a structure, and regions of interest are monitored in those images for their displacement and velocity as loading varies. Where the displacement determined exceeds a predetermined threshold, or where the acceleration determined exceeds predetermined limits, or where the distribution of displacements of parts of the structure deviates substantially from an estimated displacement distribution, an output indicating potential problems with the structure is output.

The invention discloses a generation method, an estimation method, a device and equipment of a digital twin model for structural load-response joint estimation, and a medium. The method comprises the following steps: determining an output estimated load based on training structural response through an encoder; extracting a graph structure feature vector based on training structure response through a graph-based digital twinning module; determining, by a decoding module, a predicted structure response based on the graph structure feature vector and the estimated load; and constructing a loss function value based on the predicted structure response, and training the digital twin model based on the loss function value. Under the condition that no prior load information is needed, the estimated load of the structure is estimated through the encoder, and the estimated load is input into the decoder to construct the high-precision structure response digital twin model, so that unsupervised estimation of the load is realized, and the reliability of the structure response digital twin model is improved. The accuracy and stability of civil engineering structure state evaluation in a complex and changeable external environment and the reliability in practical application are improved.