123 results about "Response spectrum" patented technology

The invention discloses a high-speed rail system sliding layer peak displacement envelope curve and rail direction irregularity prediction method considering seismic oscillation and pier height uncertainty and application. The method comprises the following steps: constructing a multi-mode hybrid neural network model TransTCN embedded with field priori knowledge; feature extraction is carried out on multi-modal input features of a time sequence based on seismic oscillation fusion structure features and a space sequence for outputting peak displacement based on an elastic response spectrum method; the pier height features and the seismic oscillation features are subjected to dimension fusion to serve as time sequence features, and a time dependency relationship is processed; processing a spatial dependency relationship by taking an elastic response spectrum analysis result as a spatial feature; and jointly inputting the extracted features into a constructed multi-mode hybrid neural network model TransTCN, and realizing prediction of the peak displacement envelope curve and rail direction irregularity of the sliding layer of the high-speed rail system under the consideration of seismic oscillation and pier height uncertainty. The prediction precision is improved, the training sample demand is reduced, the regional high-speed rail system damage is rapidly evaluated, and the practical value is good.

The invention relates to the technical field of road surface detection, in particular to a road surface skid resistance detection system based on multi-feature fusion, which comprises the following steps: applying broadband sweep frequency excitation by using a frequency modulation vibration sensor, matching with the inherent frequency of road surface texture to generate local resonance, and collecting the temperature, humidity and rainfall of a road surface in real time; performing fast Fourier transform on the collected vibration signals to obtain a resonance response spectrum, extracting key parameters through Gaussian fitting, and fusing frequency domain, material and environment data to form a comprehensive feature set; the frequency domain features are converted into three-dimensional energy distribution of pavement microtextures, the actual contact area ratio is calculated according to the three-dimensional energy distribution, an environment temperature and humidity compensation factor is introduced, and a dynamic friction attenuation coefficient is calculated; and comparing the calculated dynamic friction attenuation coefficient with a third-level safety threshold, and outputting a corresponding anti-skid performance level. Multi-source data fusion enables a detection result to be more fit with an actual driving scene, and misjudgment caused by single data is avoided.

The invention relates to a large-span bridge anti-seismic performance optimization and evaluation system based on digital twinning, and belongs to the field of computer and bridge engineering. The optimization and evaluation system comprises a data acquisition and pre-processing module, a model updating module and a performance evaluation and optimization module; the optimization and evaluation method comprises the following steps: identifying the modal and frequency of a structure, obtaining the modal shape and natural vibration frequency of a bridge, and establishing a digital twinborn model of an object bridge; and according to the multi-objective optimization design function, carrying out supercomputing driven damping device parameter optimization, outputting an optimal parameter combination, and controlling hierarchical response of the bridge in an earthquake. The artificial waves generated based on the design response spectrum of the bridge can fully consider the dynamic characteristics of the large-span cable-stayed bridge and the seismic oscillation characteristics of the design site; meanwhile, only time history analysis of single seismic oscillation is involved in the anti-seismic optimization design process, the calculation amount of optimization design is greatly reduced, the comprehensive influence of each nonlinear factor on the bridge seismic response is better considered, and the complexity of large-span bridge anti-seismic optimization is remarkably simplified.

Disclosed in the present invention are a method and apparatus for synthesizing spatially cross-correlated multi-point ground motions fitting a response spectrum. The method comprises: using an influence matrix method to obtain ground motion acceleration time histories fitting a target reaction spectrum with high precision, and calculating a Fourier amplitude spectrum and a phase spectrum thereof; and considering a calculation relationship between a power spectral density function and the Fourier amplitude spectrum, taking the power spectral density function of the obtained time histories as an initial value, using a random vibration theory and Cholesky decomposition to obtain spatially cross-correlated multi-point ground motion time histories, further taking into account a phase spectrum of the ground motion time histories fitting the target reaction spectrum with high precision, and performing correction and iteration to obtain spatially cross-correlated multi-point ground motions fitting a response spectrum. The present invention overcomes the shortcomings in current multi-point ground motion time history synthesis techniques, such as the difficulty in ensuring good fitting to a target response spectrum and the non-stationarity of synthesized ground motions, helping to improve the reliability of dynamic response analysis results for large-scale engineering structures under the action of multi-point ground motions.

The invention belongs to the technical field of intelligent surveying and mapping in the building and engineering field, discloses a building structure three-dimensional intelligent surveying and mapping system based on multi-modal point cloud fusion, and mainly solves the problems of dynamic deformation capture and the like of a building structure under a complex load. Triggering a point cloud acquisition event, and generating a space-time reference alignment packet; building contour features are extracted, aerodynamic parameters are associated, an aerodynamic attribute label library is generated, wind pressure coefficient distribution of a building is obtained, and an aerodynamic coupling response spectrum is constructed; driving full-field wind pressure distribution reconstruction of the building structure, generating instantaneous wind pressure peak data, dynamically updating a damping ratio, and generating a non-stationary response quantization packet; constructing a wind pressure-deformation conformal mapping rule, generating a wind pressure-deformation conformal model, triggering risk early warning, and generating a dynamic safety instruction set; and reversely optimizing and adjusting related parameters, and generating a dynamic optimization strategy packet.

The invention relates to a seismic oscillation fitting method matched with a multi-damping-ratio response spectrum. According to the seismic motion fitting method, the seismic geology environment of the region is classified and the feature mother wave set is constructed, so that the seismic geology features of the region can be fully considered, and the fitting result can better conform to the actual condition of the target region and is more targeted and accurate. Through combination of characteristic seismic oscillation mother wave optimization and a dynamic parameterized particle swarm optimization algorithm, aiming at nonlinear characteristics of multi-damping ratio spectrum coupling matching, an improved particle swarm optimization PSO algorithm with a self-adaptive inertia weight and a learning factor is designed, and while the multi-target response spectrum fitting precision is improved, the multi-target response spectrum fitting precision is improved. And the time-frequency non-stationary characteristic of original seismic oscillation is reserved.

The invention discloses a rapid earthquake vulnerability analysis method for a deepwater bridge, which can rapidly generate artificial waves meeting the requirements of a standard response spectrum, can shorten the time for producing the artificial waves in a traditional earthquake-proof time history construction method to about 10 minutes, and greatly improves the construction efficiency of earthquake-proof time history waves. Meanwhile, the dynamic water additional mass of the deepwater bridge is determined by using a particle swarm optimization algorithm; and determining the optimal dynamic water additional mass of the deepwater bridge by checking the seismic response of the beam-column unit model corresponding to the bridge local pier entity finite element model under the dynamic water additional mass and the seismic response error of the fluid-structure interaction pier entity finite element model established on the local pier entity finite element model. Compared with a traditional numerical type deepwater bridge flowing water additional mass determination method, the method is small in calculation amount and high in calculation efficiency, and a foundation is laid for accurate earthquake vulnerability analysis of the deepwater bridge.

The invention discloses an anti-seismic property analysis method for a wind and rain bridge body structure. By constructing a finite element model of the wind and rain bridge, the mechanical response of the wind and rain bridge under the action of static load and seismic waves is simulated. The method specifically comprises the following steps: constructing a finite element model comprising a pier, a bridge floor, a wooden support and a rubber shock insulation layer; carrying out static analysis to obtain bearing capacity, deflection and stress distribution; carrying out dynamic analysis, including modal analysis and seismic response analysis, to determine a key response spectrum; and the arrangement scheme of the rubber shock insulation layer is optimized to improve the anti-seismic performance. According to the method, through refined finite element analysis and in combination with the rubber shock insulation technology, the anti-seismic performance of the wind and rain bridge is remarkably improved, and the historical and cultural values of the wind and rain bridge are kept to the maximum extent. The method provides a scientific basis and technical support for improving the anti-seismic property of a traditional wood structure building, and has important engineering application value and culture protection significance.

The invention discloses an anti-seismic property analysis method for a complex high-rise structure. The method comprises the following steps: determining a boundary range of a super high-rise building; the anti-seismic requirement of the over-limit high-rise building is determined, the height limit is determined based on different structural forms, and it is ensured that at least one aspect of the height, the height-width ratio and the body regularity of the house meets specifications and regulations; step 3, structural finite element modeling: based on the general situation of the constructional engineering, simplifying a finite element model to enable the finite element model to be consistent with an actual structure, and establishing the finite element model; 4, analyzing dynamic characteristics of the structure, wherein the inherent dynamic performance of the structure is reflected by the similar characteristics of the structure; and step 5, structural seismic response spectrum applying: applying the seismic response spectrum to the whole structure to research the maximum response of the structure under the seismic load effect of fortification intensity. According to the anti-seismic performance analysis method for the complex high-rise structure, multiple key aspects of super high-rise building boundary range determination, clear anti-seismic design requirements, structural finite element modeling, dynamic characteristic analysis, seismic response spectrum analysis and the like are comprehensively covered, and a set of systematic and complete analysis process is formed; and the anti-seismic performance of the complex high-rise structure can be deeply and carefully analyzed.

The embodiment of the invention discloses an efficient response spectrum method for soil-structure interaction anti-seismic analysis. The efficient response spectrum method comprises the steps that a finite element model of a to-be-analyzed soil-structure system is obtained; performing modal analysis on the structure model under the rigid foundation, and calculating the effective inherent frequency and modal vector of each order of the soil-structure system; according to the effective inherent frequency and the modal vector of each order, calculating a modal participation coefficient of each effective modal and a cross correlation coefficient between the effective modals; a model bottom response spectrum is obtained according to earthquake risk analysis of a specific site, and for an engineering site without earthquake risk analysis of the specific site, the model bottom response spectrum is obtained through inversion of a ground surface design spectrum through an inversion method; and determining the peak response of the structure according to the bottom response spectrum of the model. According to the embodiment of the invention, soil-structure interaction is considered in the structural seismic analysis response spectrum method, and the execution efficiency is relatively high.

The invention provides a rebuilt underground structure earthquake analysis method combined with a reaction acceleration method, and the method comprises the steps: building an overall structure calculation model which comprises a foundation and a soil body around an underground structure, and the overall structure calculation model comprises an overground structure, the underground structure, the soil body around the underground structure, and the loads of the overground structure and the underground structure; carrying out response spectrum seismic analysis without considering the weight and inertia force of an underground structure and a soil body; then, canceling lateral constraint of a soil body boundary around an outer wall of the underground structure, and carrying out response acceleration method analysis on the underground structure; and performing most disadvantageous superposition and combination on the members of the underground structure in the overall calculation model according to internal force calculated by response spectrum seismic analysis and a response acceleration method, and performing aseismic design of the members. According to the method, the interaction influence of the site soil body, the underground structure and the overground structure can be quickly and conveniently considered, simplified calculation of the earthquake action of the rebuilt underground structure is achieved, and aseismic design can be carried out.

The invention relates to the technical field of rotating machinery fault monitoring, and discloses a method and system for monitoring a torsional vibration fault of a shaft system of a steam turbine generator unit, and the method comprises the steps: obtaining a single-point torsional vibration signal, and converting the single-point torsional vibration signal into an angular domain sequence; extracting a narrow-band modulation component of a specific order band and calculating a torsional vibration logarithmic response spectrum; performing inverse transformation on the logarithmic spectrum to obtain cepstrum data reflecting the periodicity of the shafting structure; delimiting a structure reflection propagation time delay interval according to the geometric distance from the sealing end to the rigid coupling and the material wave velocity; identifying a sealing-coupling boundary reflection peak value and a series structure in the interval, and constructing a series enhancement index; reversely deducing an equivalent reflection intensity and an equivalent structure distance, and generating a health index; and finally, mapping the health index into a binarization result through a step function, and outputting normal or abnormal judgment for the sealed end. According to the invention, the high-sensitivity and deterministic monitoring of the local abnormity of the sealing end is realized by using the echo structure information.

The invention discloses a method for measuring the shear wave velocity of a material, which comprises the following steps of: firstly, selecting a material to be tested, and manufacturing the material into a cylindrical test piece; pasting a sensor on the cylindrical surface at each of the two ends of the cylindrical test piece, wherein the two sensors are spatially staggered to form an included angle of 90 degrees; then electrically connecting one sensor with a signal generator, electrically connecting the other sensor with a lock-in amplifier, electrically connecting the lock-in amplifier with signal acquisition equipment, and starting the signal generator and the signal acquisition equipment; performing signal analysis to obtain a response frequency spectrum of the cylindrical test piece under scanning excitation; and finally extracting a first-order torsional natural vibration frequency corresponding to a first peak value in the response frequency spectrum, and calculating to obtain the shear wave velocity of the test piece. According to the method, the selection error of the first arrival moment of the shear wave and the influence caused by ultrasonic time domain measurement noise can be avoided, the convenience and accuracy of material shear wave velocity measurement are improved, and a theoretical basis and data support can be provided for measurement of related mechanical properties of the material.

The invention discloses a design method of an integral swing self-resetting structure for mounting a tension-compression energy-dissipation support, and relates to the technical field of civil engineering earthquake resistance, and the integral swing self-resetting structure comprises a tensile limiting device and a compression limiting device; the method specifically comprises the steps that a structural mechanical model is established, and the lateral stiffness of a traditional fixed foundation is calculated; setting a rigid body displacement ratio to determine the vertical and horizontal rigidity and strength of the support; carrying out finite element push-and-cover analysis to verify a rigid body displacement ratio; setting an additional damping ratio; carrying out seismic response spectrum analysis on the vertical seismic isolation structure; calculating the vertical natural vibration period of the structure and adjusting the rigidity according to the response spectrum; carrying out elastic-plastic time-history analysis to detect an interlayer displacement angle, acceleration and structural damage; checking the consistency of the additional damping ratio and the actual energy consumption; and finally, anti-overturning checking calculation under extremely rare earthquake is carried out to ensure that the support and the limiting device are in an elastic state. The energy dissipation capacity and anti-seismic safety of the structure can be effectively improved, and the structure is suitable for various building structures needing vertical and horizontal seismic isolation.

The invention provides a near fault pulse type seismic oscillation generation method, device and equipment and a medium thereof, and relates to the technical field of seismic resistance, and the method comprises the steps: obtaining seismic oscillation parameter data of a near fault; constructing an equivalent velocity pulse model based on the seismic oscillation parameter data of the near fault, and generating a long-period component acceleration time history of an equivalent velocity pulse; performing high-frequency component acceleration time history analysis on the basis of the seismic oscillation parameter data of the near fault to obtain a high-frequency component acceleration time history of seismic oscillation; and carrying out superposition based on the long-period component acceleration time history of the equivalent speed pulse and the high-frequency component acceleration time history of the seismic oscillation, and solving an acceleration response spectrum obtained by superposition through iteration until the acceleration response spectrum reaches a preset requirement, thereby obtaining the near-fault pulse type seismic oscillation. According to the method, the amplitude, the period and the shape of the control speed pulse and the effective duration of the seismic oscillation acceleration time history are met, and the requirement of matching the target response spectrum to obtain random seismic oscillation is met.

The present invention provides a method and device for generating equivalent static force of seismic response spectrum of marine engineering structure, which relates to the technical field of seismic analysis of marine engineering structure, including: establishing a main finite element model and a nonlinear pile pipe structure finite element model of the marine engineering structure according to building data, and performing nonlinear static analysis processing by presetting a static reduction method model to reduce the stiffness matrix and mass matrix of the nonlinear pile pipe structure and determine the pile head super unit finite element model; combining the main finite element model and the pile head super unit finite element model to determine the target model, and performing modal analysis processing on the target model by inputting the seismic response acceleration spectrum in the horizontal direction into the target model to determine the seismic equivalent static force in the specified direction. The present invention accurately calculates the seismic equivalent static force of the marine engineering structure based on the modal response, which can significantly improve the safety and stability of the marine engineering structure under the action of earthquake.

The invention provides a workshop floor response spectrum calculation method adopting substructure analysis, and the method comprises the steps: solving a site response problem of a free field through a semi-analytical method based on the modulus and damping of the free field, and obtaining transmission boundary information; respectively calculating foundation impedance matrixes of transmission boundary information through a flexible volume method; calculating an upper structure matrix according to the foundation impedance matrix; the upper structure matrix comprises an upper stiffness matrix, an upper mass matrix and an upper damping matrix; constructing a motion equation according to the foundation impedance matrix and the upper structure matrix, and solving to obtain a frequency domain displacement response transfer function; and performing interpolation calculation on the frequency domain displacement response transfer function to obtain seismic response. According to the method, the calculation of the reaction spectrum is realized through a substructure analysis method for decomposing a linear soil-junction interaction analysis problem into a series of relatively simple subproblems, the calculation efficiency is improved, and the model construction period is shortened.

The application discloses a kind of nuclear fusion device construction earthquake spectrum automatic fitting and structure checking system, comprising: GB parameter library and index module, for using index key retrieval and return specified data domain composition parameter set;Spectrum generation and fitting module, according to internal data of parameter set, call GB database to extract the parameter required for seismic design, automatically truncate negative value and control spectrum tail change consistent, generate the horizontal seismic influence coefficient curve after fitting, vertical seismic influence coefficient curve and corresponding frequency acceleration spectrum;Static equivalent and FRS determination module, the first natural frequency is obtained in fitting data by modal analysis and is judged according to preset threshold, respectively corresponding to static equivalent acceleration and response spectrum analysis operation;Data export and interface module, for output readable load spectrum file.The application can realize the automatic generation export operation of seismic influence curve, frequency acceleration spectrum, and support the seismic spectrum analysis and static strength checking of nuclear fusion device.

The invention discloses an earthquake response spectrum feature extraction method and device based on deep learning, and relates to the technical field of nuclear power equipment earthquake resistance analysis. Comprising the following steps: S1, acquiring seismic response spectrum data required by anti-seismic calculation of equipment or a pipeline in a nuclear power project; s2, preprocessing the seismic response spectrum data; s3, constructing an auto-encoder neural network model; s4, training and verifying the neural network model by using the partially preprocessed seismic response spectrum data; and S5, inputting the remaining preprocessed seismic response spectrum data into the trained neural network model for prediction, and outputting a feature vector after dimension reduction. The method can effectively extract the key features of the seismic response spectrum, can be applied to an intelligent prediction and optimization system of the seismic mechanical calculation result of the equipment or the pipeline, rapidly outputs the stress result of the equipment or the pipeline under the action of the seismic load, remarkably improves the seismic design efficiency of the nuclear power equipment, and reduces the cost. Therefore, the research and development progress of an engineering project and a new model or a new heap model is met.

The invention belongs to the related technical field of building shock insulation, and discloses an integrated anti-seismic optimization design method and equipment for a foundation shock insulation structure with an additional tuning inerter shock absorption system, and the method comprises the following steps: (1) simplifying the foundation shock insulation structure with the additional tuning inerter shock absorption system into a two-degree-of-freedom system, carrying out response spectrum analysis on the two-degree-of-freedom system based on a standard response spectrum; (2) optimizing design parameters of the tuning inerter system based on a response spectrum analysis result; and (3) determining an effective damping ratio corresponding to the tuning inerter system based on a principle that the displacement of the vibration isolation structure is equal, and then, after an equivalent basic vibration isolation structure with an additional effective damping ratio corresponding to the basic vibration isolation structure of the additional tuning inerter damping system is established, carrying out structural design based on the equivalent basic vibration isolation structure. Therefore, the integrated anti-seismic optimization design of the foundation seismic isolation structure additionally provided with the tuning inerter damping system is completed. According to the invention, the integrated anti-seismic optimization design of the foundation seismic isolation structure additionally provided with the tuning inerter damping system is realized.

The invention discloses a response spectrum matching seismic oscillation generation method, system and terminal based on Fourier transform and S transform, and the method comprises the steps: calculating a Fourier coefficient and an actual response spectrum of seed seismic oscillation, and carrying out the S transform at a frequency point where amplitude adjustment needs to be carried out, carrying out amplitude adjustment on the S transformation coefficient and then carrying out integration to obtain an adjusted Fourier coefficient; and finally, carrying out inverse Fourier transformation on the Fourier coefficient to obtain target seismic oscillation after response spectrum matching. According to the method, the advantages of the S transformation and the Fourier transformation are combined, the fast Fourier transformation is utilized to greatly improve the calculation efficiency, the S transformation is utilized to carry out excellent time-frequency localization adjustment on the signal, local S transformation is only carried out at the frequency point where S transformation coefficient amplitude adjustment is needed, S transformation does not need to be carried out on the whole frequency domain, and the method is easy to implement. And response spectrum matching which is efficient and high in precision and maximally retains original seismic oscillation time-frequency non-stationary characteristics is realized.

The invention relates to a seismic oscillation simulation method matched with a long-period response spectrum, and the method achieves the high-precision representation of a 0.03-20 s full-band seismic oscillation characteristic through expanding a response spectrum analysis period to 20 seconds and constructing a low-frequency characteristic seismic oscillation database. According to the method, the limitation that attenuation of a traditional model is too fast in an amplitude drop section is broken through, and a seismic oscillation input solution with broadband spectrum matching precision and geological environment physical characteristic fidelity is provided for aseismic design of long-period structures such as a super high-rise building.

The invention provides a simplified design system for a damping structure. Non-damping structure data calculated through a vibration mode decomposition reaction spectrum method can be obtained through a data importing and preprocessing module; performing calculation and CQC correction on a displacement spectrum according to the obtained acceleration response spectrum through an anti-seismic standard response spectrum calculation module to obtain a displacement spectrum corresponding to the equivalent single-degree-of-freedom system; the performance curve generation module is used for generating a performance curve graph of the system ductility coefficient relative to the rigidity ratio, identifying an optimal performance design point, and generating a damper design scheme according to the number of dampers in each layer; the parameters of the damper are calculated layer by layer according to a preset additional rigidity distribution strategy through a multi-degree-of-freedom system design module, and the matching degree of the deformation capacity of the damper and the interlayer displacement angle requirement is verified; and parameter output and visual display of each layer of damper are realized through a result output and visual module, so that rapid estimation of damper parameters is realized, and preliminary design of a damping structure is completed.

The invention provides a high arch dam earthquake vulnerability analysis method and system based on an extreme gradient lifting tree theory, and the method comprises the steps: obtaining a plurality of pieces of earthquake vibration data meeting the feature requirements of a high arch dam site, and constructing an engineering demand parameter set and an earthquake vibration intensity parameter set; constructing a high arch dam probability earthquake demand model based on an extreme gradient lifting tree model, and fitting a non-linear relationship between engineering demand parameters and earthquake intensity parameters; fitting a change curve of the engineering demand parameters with respect to the acceleration response spectrum value in the first-order natural vibration period based on a scalar model, and extracting boundary values divided by different anti-seismic performance levels; and on the basis of an engineering demand parameter logarithmic normal distribution hypothesis, using the fitted high arch dam probability earthquake demand model to construct an earth surface vulnerability function, and inputting an earth vibration strength parameter and boundary values of different anti-seismic performance levels for calculation to obtain earthquake vulnerability probabilities of the high arch dam under the different anti-seismic performance levels.

The invention discloses an ice vibration response spectrum analysis method and system based on sea ice parameter distribution characteristics, and relates to the field of ice engineering calculation analysis, and the method comprises the steps: constructing an offshore wind turbine motion control equation of a single-degree-of-freedom system under the action of sea ice, and obtaining the power spectrum density of a dynamic ice load; based on compression strength and bending strength of sea ice, a joint probability density function of ice thickness and ice speed is obtained, and an ice area is partitioned; ice force time history samples are obtained, corresponding acceleration response spectrums are deduced and established according to different divided ice areas, and equivalent sea ice force acting on a single-degree-of-freedom system is obtained; and maximum data of all response spectrum curves of different sea ice time history samples in each ice area are taken, and a segmented fitting method is adopted to obtain a design response spectrum of sea ice force. The dynamic ice force time history and the dynamic response of the offshore wind turbine can be quickly and accurately obtained under different sea ice parameters, and technical support is provided for ice-resistant design of an offshore structure.

This invention belongs to the field of frequency domain seismic simulation analysis technology for computer cabinets. Specifically, it provides a method, device, equipment, and medium for extracting plastic strain from the seismic response of a computer cabinet. The method includes: the displacement field of the computer cabinet under a set response spectrum; extracting the displacement results of all unit nodes of the cabinet and storing them locally; processing the displacement result file; copying the original finite element model to generate a new calculation model; resetting the analysis step of the new calculation model to static analysis and adding plastic material parameters to the material; defining a discrete field; importing the data file after processing the displacement results into the new calculation model to generate a discrete field; applying displacement boundary constraints to all nodes of the cabinet in the new calculation model; and, after receiving the set trigger information, calculating and extracting the plastic index of the cabinet at the most dangerous moment during the seismic experiment. The displacement results are processed and assigned to the new model through the definition of a discrete field, reducing testing costs.

This invention relates to a seismic performance optimization and evaluation system for long-span bridges based on digital twins, belonging to the fields of computer science and bridge engineering. The optimization and evaluation system includes a data acquisition and preprocessing module, a model update module, and a performance evaluation and optimization module. The optimization and evaluation method includes identifying the structural modes and frequencies to obtain the bridge's mode shapes and natural frequencies, and establishing a digital twin model of the target bridge. Based on a multi-objective optimization design function, supercomputing-driven optimization of vibration reduction device parameters is performed, outputting the optimal parameter combination to control the bridge's graded response under earthquakes. The artificial wave generated based on the bridge's design response spectrum can fully consider the dynamic characteristics of long-span cable-stayed bridges and the seismic motion characteristics of the design site. Simultaneously, the seismic optimization design process only involves the time history analysis of a single ground motion, significantly reducing the computational load of the optimization design and better considering the comprehensive influence of various nonlinear factors on the bridge's seismic response, thus significantly simplifying the complexity of seismic optimization for long-span bridges.

The invention relates to the technical field of seismic engineering and artificial intelligence, in particular to a seismic oscillation selection method and system based on spectral feature extraction and clustering, and discloses a seismic oscillation record selection method based on principal component analysis dimensionality reduction and K-means clustering. The method comprises the following steps: firstly, acquiring candidate records from a database according to set seismic parameters of a site, and performing pulse and non-pulse label division; amplitude modulation and normalization preprocessing are carried out on the response spectrum data, and a high-dimensional acceleration response spectrum is compressed into low-dimensional potential features through PCA dimension reduction; and finally, on the basis of a dimension reduction result, performing grouping by applying a K-means clustering method, and performing record selection and response spectrum comparison. The system comprises a record reading and processing module, a feature extraction module, a feature clustering module, a verification module and an output module, velocity pulse and non-pulse classification is carried out before an alternative record data set is constructed, and a near fault velocity pulse effect is considered at the beginning of record selection.

The invention discloses an earthquake simulation method for an energy storage container. The method comprises the following steps: acquiring an initial three-dimensional model of the energy storage container; constructing a corresponding multi-rigid body system; carrying out modal analysis on the multi-rigid-body system by adopting an SRSS method to obtain the sum of rigid modals so as to generate a corresponding time domain-multi-rigid-body system seismic response spectrum; and converting the time domain-multi-rigid-body system seismic response spectrum into a corresponding frequency domain-multi-rigid-body system seismic response spectrum, and solving an equation under the action of seismic acceleration based on the frequency domain-multi-rigid-body system seismic response spectrum to obtain an acceleration response curve of each rigid body. The invention further provides an energy storage container earthquake simulation system. According to the method provided by the invention, the response of the energy storage container under the earthquake action can be quickly and accurately simulated, so that a scientific basis is provided for design, installation and operation of the energy storage container.

The embodiment of the invention discloses a non-stationary seismic oscillation generation method and device, electronic equipment and a storage medium, and relates to the technical field of seismic engineering, and the method comprises the steps: 1, generating a seed seismic oscillation time history based on a power spectrum model; 2, performing wavelet packet decomposition on the seed seismic oscillation time history to obtain a group of sub-signal components in a time-frequency domain, and identifying a strong seismic time period; 3, constructing a time-varying function, and correcting sub-signal components in a strong earthquake time period; 4, reconstructing and generating an intermediate seismic oscillation time history according to the adjusted sub-signal components, and judging whether the intermediate seismic oscillation time history meets a preset precision requirement or not; if not, taking the intermediate seismic oscillation time history as a new seed seismic oscillation time history, and repeating the steps until a preset precision requirement is met; through time domain localization correction, the contradiction between response spectrum matching and intensity non-stationary maintenance is solved, seismic oscillation which accords with a target response spectrum and has real non-stationary characteristics is generated, and the reliability of anti-seismic analysis is improved.