36 results about "Harmonic response" patented technology

The invention belongs to the technical field of power equipment insulation state detection, and particularly relates to an XLPE cable water branch quantitative evaluation method and system based on frequency conversion pseudo trapezoidal wave excitation, and the method comprises the steps: applying pseudo trapezoidal wave excitation, and collecting voltage and current signals; wavelet and adaptive filtering are combined for denoising; establishing a Wiener-ANN nonlinear dielectric response model, and fitting cable response through the combination of a dynamic linear neural network module and a static neural network module; obtaining a frequency domain dielectric spectrum and extracting a multi-harmonic characteristic parameter, a loss slope, a hysteresis angle and a time domain nonlinearity; and finally, outputting a water treeing aging comprehensive index WTI through the support vector machine regression model to realize quantitative evaluation of the aging degree. The system comprises a pseudo trapezoidal wave excitation unit, a high-voltage amplification unit, a micro-current acquisition unit, a signal processing unit and an aging evaluation unit. The broadband harmonic response can be obtained through a single test, the test efficiency is improved by more than 75%, the anti-interference performance is high, the evaluation precision is high, and the method is suitable for on-site rapid nondestructive diagnosis.

The invention provides a transformer transportation impact damage assessment method based on a damage response surface model. According to the method, refined impact excitation is constructed, and impact simulation is carried out on a finite element model of the transformer by utilizing the impact excitation. In the simulation process, the vibration response of the finite element model is collected, the damage conditions of different parts of the finite element model are subjected to harmonic response analysis, and damage point data of the part which is damaged first is selected to construct a damage response surface model. And multi-modal influence factors of impact acceleration and impact frequency are introduced into the damage response surface model, so that the damage response surface model can accurately describe the boundary of damage of the transformer under impact. By using the damage response surface model, the damage risk in the transformer transportation process can be accurately and effectively evaluated.

The present application belongs to the technical field of power monitoring, and discloses a detection method for monitoring the state of primary-secondary fusion circuit breaker, comprising: obtaining circuit breaker state data, including electromagnetic waveform data, harmonic response characteristics and temperature distribution gradient; obtaining circuit breaker electric field distribution fingerprint through nonlinear segmented harmonic analysis, constructing a multi-dimensional penetration feature matrix, and establishing a micro-scale electric-thermal coupling atlas; obtaining a nonlinear region situation table through impedance distortion analysis, obtaining a harmonic penetration curve through multi-frequency response analysis, and constructing a high-frequency harmonic penetration path spectrum; establishing a micro-region diagnosis algorithm, performing nonlinear impedance calibration, and generating a multi-level protection instruction sequence; adjusting the operating state of the circuit breaker, obtaining the circuit breaker medium steady-state index, and performing risk analysis to obtain a harmonic penetration early warning report; the present application realizes accurate identification and early warning of abnormal regions inside the circuit breaker, and improves the safe and stable operation ability of the primary-secondary fusion circuit breaker.

A space flywheel optimization design method comprises the following steps: S1, designing an initial space flywheel based on input conditions and technical requirements of the space flywheel, and obtaining initial values of design variables of the initial space flywheel; S2, performing modal analysis and harmonic response analysis on the initial space flywheel based on the input conditions and the technical requirements, judging whether the initial space flywheel meets the design requirements, taking the mass and the harmonic amplification factor of the space flywheel as optimization objectives, and obtaining initial values of the two optimization objectives of the initial space flywheel meeting the design requirements; the space flywheel optimization design method is used for optimizing design of the space flywheel with respect to two or more evaluation index parameters or optimization objectives in conflict, and an optimal space flywheel model meeting input conditions and technical requirements required by a space environment is obtained.

The invention belongs to the technical field of vibration control, and relates to an instrument vibration reduction control method and system based on double resonance, and the method comprises the steps: determining the resonance frequency of an instrument based on an established finite element model of a pipeline system connection instrument; a resonance structure is additionally arranged on a pipeline of the finite element model to establish a retuning model; performing harmonic response analysis on the primary tuning model to obtain a peak frequency of the primary tuning model, and when the peak frequency is inconsistent with the resonant frequency, adjusting resonant structure parameters and optimizing the primary tuning model; installing a tuned mass damper on a resonant structure of the optimized single-tuning model, and establishing a double-tuning model; and carrying out harmonic response analysis on the double-tuning model to obtain the trough frequency of the double-tuning model, and when the trough frequency is inconsistent with the resonant frequency, adjusting the parameters of the tuned mass damper and optimizing the double-tuning model. The influence of specific frequency vibration on the instrument is efficiently suppressed, and the performance stability and the measurement precision of the instrument are guaranteed.

The invention discloses a characteristic influence analysis method for an impulse sound source circular tube-shaped composite receiving transducer, which relates to the related technical field of transducers, and comprises the following steps: constructing a simulation model of a 2-2 type piezoelectric composite circular tube-shaped receiving transducer through COMSOL; after harmonic response analysis is carried out on the simulation model, factors influencing the performance of the 2-2 type piezoelectric composite circular tube receiving transducer are obtained through parameters and constraint conditions of the simulation model, and design improvement is carried out on the 2-2 type piezoelectric composite circular tube receiving transducer according to the influence factors. According to the invention, an important new technical basis is provided for the research of the impulse sound source depth detection technology receiving transducer.

The invention discloses a radial point interpolation finite element method for linear elastic solid harmonic response and application, and belongs to the technical field of solid mechanics and engineering numerical simulation. The method comprises the following steps: discretizing a linear elastic solid problem domain into a standard finite element grid, deriving a nodal function through a radial basis function, selecting a local enhanced interpolation basis function to construct a newly added degree of freedom and complete local numerical approximation, and constructing a global interpolation format of a displacement vector field in an element in combination with unit decomposition characteristics; based on the interpolation format and a Galerkin weak form of an elastic dynamic problem, applying a displacement boundary condition to obtain a system forced vibration equation; acquiring steady-state dynamic response and frequency domain response characteristics under different frequency harmonic excitation; according to the method, high-order interpolation can be realized without increasing nodes, the numerical precision is improved, the computing resource and time consumption is reduced and a more reliable numerical solution is provided under the condition that the grid density is relatively small, and the method has important application value in engineering practice.

The present application belongs to the technical field of vibration control, and relates to an instrument damping control method and system based on double resonance, which comprises the following steps: determining the resonance frequency of an instrument based on a finite element model of a pipeline system connected to the instrument; adding a resonance structure to the pipeline of the finite element model to establish a one-tuned model; performing harmonic response analysis on the one-tuned model to obtain the peak frequency of the one-tuned model, and adjusting the resonance structure parameters to optimize the one-tuned model when the peak frequency is inconsistent with the resonance frequency; installing a tuned mass damper on the resonance structure of the optimized one-tuned model to establish a two-tuned model; performing harmonic response analysis on the two-tuned model to obtain the valley frequency of the two-tuned model, and adjusting the tuned mass damper parameters to optimize the two-tuned model when the valley frequency is inconsistent with the resonance frequency. The present application efficiently suppresses the influence of vibration at a specific frequency on the instrument, and guarantees the stable performance and measurement accuracy of the instrument.

A rocket system level structure vibration simulation and verification method, comprising: constructing a rocket system level structure finite element model based on modal superposition method, carrying out harmonic response analysis, constructing excitation-response transfer function in frequency domain, and determining dynamic load transfer path and amplification effect; combining the power spectral density of the rocket vibration environment, implementing random vibration analysis, quantifying the system level structure strength safety margin by calculating the fatigue life; selecting weak components or typical components to carry out targeted vibration test, and verifying the reliability of the system level vibration simulation method in the above steps through test data. The method can effectively improve the vibration environment prediction accuracy and structure design reliability.

This invention discloses a method for predicting the multi-physics coupled vibration response of a pump set based on the superposition of frequency domain excitation spectra. The method includes: performing closed-loop flow field calculations of the pump set to extract the time-domain fluid excitation force on the surface of the pump set's flow-through components; performing numerical simulation calculations of the motor's electromagnetic field to extract the time-domain electromagnetic excitation force; establishing a calculation model of the pump's rotor system, applying the rotor system's mass imbalance, time-domain fluid excitation force, and time-domain electromagnetic excitation force, performing transient dynamic calculations of the rotor system, and extracting the time-domain mechanical excitation force; performing modal calculations of the entire pump set to obtain a numerical simulation calculation model of the entire pump set; converting the time-domain fluid excitation force, time-domain electromagnetic excitation force, and time-domain mechanical excitation force into frequency domain excitation spectra using FFT, applying them to the coupling surfaces of the pump body, and performing harmonic response analysis of the pump set under multi-source excitation in the frequency domain to obtain the coupled vibration response results of the pump set. This invention enables rapid and accurate prediction of the multi-physics coupled vibration response of a pump set.

The invention discloses an electric drive spline NVH optimization method, which comprises the following steps of: constructing an electric drive system three-dimensional model containing key parts of a motor and a speed reducer by using multi-body dynamics software, dividing a finite element mesh and refining a gear contact surface; spline macroscopic parameters are input, and spline excitation and harmonic response are calculated; setting a plurality of groups of tooth crowning quantities, and comparing and selecting the optimal modification scheme with the lowest vibration response; and the sample preparation piece is tested and verified by a rack after being assembled. The method can recognize the NVH risk in advance, reduces the spline contact stress and load fluctuation, saves the research and development cost, and is suitable for spline-connected shafting structures such as motors, generators and transmissions.

The present application relates to the field of petrochemical industry, and specifically proposes a method, system, device and medium for optimizing heating furnace pipes based on flow heat-induced vibration. The method comprises: determining fluid domains and solid domains according to a preset three-dimensional geometric model of a convection section and its pipe bundle of a heating furnace, and performing grid division on the fluid domains and the solid domains; calculating pressure load through a CFD solver based on the grid division result of the fluid domains; performing modal analysis and harmonic response analysis on the pipe bundle based on the pressure load and the grid division result of the solid domains; and optimizing the design of the heating furnace pipe arrangement according to the result of the harmonic response analysis. The present application assists in optimizing the design of the pipe bundle of the heating furnace in the design experiment and operation stage, effectively reduces the vibration level of the pipe system by improving the pipe structure design and optimizing the fluid flow process, avoids the occurrence of resonance phenomenon, significantly reduces the safety hazards caused by vibration, and improves the reliability and safety of the heating furnace.

The application discloses a kind of welded structure harmonic response structural stress fatigue life prediction method, comprising the following steps: step 1: build the finite element model of welded structure containing weld;Step 2: using unit external load to the finite element model of welded structure harmonic sweep frequency obtains node response displacement;Step 3: according to external load coefficient obtains the unit stiffness matrix and node displacement under external load, as follows: step 4: calculate the simple harmonic response structural stress and equivalent structural stress of structure.The welded structure harmonic response structural stress fatigue life prediction method of the application: (1) compared with traditional quasi-static method, can solve the problem that quasi-static method cannot be carried out vibration fatigue evaluation, (2) compared with frequency domain structural stress method, can solve the problem that frequency domain structural stress method cannot evaluate simple harmonic vibration fatigue, (3) compared with traditional transient structural stress method, the method of the application is more efficient, and the result error is very small.

This invention discloses a method for calculating noise through direct coupling between a worm gear structure and its acoustic field, belonging to the field of noise prediction technology for mechanical transmission systems. The method includes: decomposing the time-domain torque into DC and AC components; establishing a structure-acoustic field coupled finite element model with a matching layer (PML); solving for steady-state prestress using the DC component; treating the AC component as a disturbance under prestress, and directly solving the coupled dynamic equations through harmonic response to obtain the full-field sound pressure response in one step; finally, extracting the sound pressure level distribution to achieve noise prediction. This invention overcomes the shortcomings of the traditional "two-step method" (cumbersome process, neglecting the acoustic radiation of the worm gear itself) by linearizing the prestress and using a one-step direct coupling solution, achieving fast and high-fidelity noise prediction under steady-state conditions, significantly improving computational efficiency and accuracy.

The invention belongs to the technical field of unmanned aerial vehicles, and discloses an unmanned aerial vehicle vibration characteristic optimization method and system based on simulation analysis. Comprising the following steps: carrying out cantilever beam test on a carbon fiber tube to obtain a load-displacement curve; performing material setting adjustment on the initial carbon tube model until the simulation load-displacement curve is consistent with the load-displacement curve, and obtaining a target carbon tube simulation model; constructing an arm model based on the target carbon tube simulation model, and performing modal analysis to obtain a resonance sensitive interval; adding sine response wave sweep frequency corresponding to a preset resonance interval to the bottom of the motor model to simulate motor excitation, and performing harmonic response analysis to determine a danger frequency; after the vehicle arm model is adjusted, modal analysis and harmonic response analysis are sequentially carried out until it is judged that the lower limit frequency of the correspondingly obtained resonance sensitive interval is higher than the danger frequency of the maximum frequency, and a target vehicle arm model is obtained; and carrying out vibration reduction optimization on the actual arm based on the target arm model. The method is high in efficiency, and the simulation result is more reliable.

According to the transformer transportation impact damage assessment method based on time-frequency analysis, harmonic response analysis is carried out on damage conditions of different parts of a transformer, the damage conditions of the parts under different impact accelerations and impact frequencies are considered in the process of constructing an extreme damage curve, and the accuracy and the reliability of the transformer transportation impact damage assessment method are improved. Therefore, the limit damage curve can accurately describe the damage boundary of the transformer under the impact. The impact acceleration-impact time coordinate system is divided into a damage occurrence area and a non-damage area based on an extreme damage curve, so that a refined and multi-parameter fusion risk assessment model is constructed. Through the risk assessment model, the reliability and accuracy of transformer transportation safety assessment can be effectively improved.

The application discloses a vibration processing method and device, electronic equipment and storage medium, relates to the technical field of structure optimization and data analysis processing, and the method comprises the following steps: performing modal analysis on a three-dimensional model of a product structure comprising a piezoelectric component to obtain a target modal vibration mode diagram; performing harmonic response sweep analysis on a natural frequency range locked according to the target modal vibration mode diagram to obtain a resonance frequency range; if a preset electromechanical parameter excitation frequency is in the resonance frequency range, performing transient dynamics analysis according to the excitation frequency to determine whether the product surface amplitude and acceleration meet the expected requirements, and if yes, performing vibration processing according to the target electromechanical parameters determined according to the excitation frequency and the target product structure determined according to the product structure. The application can quickly obtain a structure product and electromechanical input parameters meeting the touch effect, effectively reduces the research and development design cycle and test cost of a coupled touch product, and enables users to have a better product touch feeling.

The invention relates to an oscillation signal detection method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring a time domain voltage signal from a power system; performing time-frequency analysis on the time-domain voltage signal based on time-frequency transformation to obtain a first time-frequency representation complex matrix; time-frequency rearrangement is carried out on the first time-frequency representation complex matrix to obtain a second time-frequency representation complex matrix, the energy concentration ratio of time-frequency representation of the second time-frequency representation complex matrix is higher than that of the first time-frequency representation complex matrix, and a time-frequency representation spectrogram is generated based on the second time-frequency representation complex matrix; extracting an instantaneous frequency spectral line from the time-frequency representation spectrogram, and carrying out instantaneous frequency identification to obtain an instantaneous frequency value; and based on the instantaneous frequency value, determining whether harmonic waves and / or inter-harmonic waves exist in the time domain voltage signal, and in response to the existence of the harmonic waves and / or inter-harmonic waves in the time domain voltage signal, determining that an oscillation signal exists in the power system. The oscillation signal in the power system can be accurately detected, and a basis is provided for stability analysis of the power system.

The invention relates to the technical field of seismic physical exploration, in particular to an intelligent seismic exploration method and system based on multimode fusion. The method comprises the following steps: collecting multiple types of geophysical observation data, carrying out space registration and time registration, and generating a multimode observation data set; extracting passive source seismological observation data, constructing a resonance response feature tensor, and performing forward calculation by using a resonance peak identification neural network model to generate a resonance feature set; performing feature alignment according to the grid node index to construct a multi-mode fusion feature vector, and performing inversion calculation on the multi-mode fusion feature vector by using a multi-mode fusion inversion model in combination with a learnable modal weight mechanism to obtain a physical property parameter set; and performing segmentation processing and spatial clustering processing on the physical property parameters of each grid node, generating a stratum interface set and an anomalous body set, and obtaining an intelligent seismic exploration result. According to the invention, a seismic exploration mode capable of continuously presenting an underground structure in a complex environment and giving a stable physical property result is realized.

The invention discloses a quantitative analysis method for a vibration stress state of a turbine blade under a working condition. The quantitative analysis method comprises the following steps: establishing a finite element simulation model and applying a boundary condition; three-dimensional non-uniform temperature field data and non-uniform pneumatic pressure field data of the blade surface are obtained through CFD calculation; coupling and applying a temperature field, pneumatic static pressure and a centrifugal force load in static structure analysis to obtain a basic stress state; pre-stress modal analysis is carried out, blade dynamic frequency containing centrifugal stiffening and thermal softening effects is calculated, and a Campbell diagram is drawn to identify resonance points under the working rotating speed; in harmonic response analysis, pneumatic pressure pulsation components extracted according to CFD results are applied to resonance points to serve as excitation, and vibration stress distribution of the blade under thermal-centrifugal-pneumatic three-field coupling loads is obtained through a mode superposition method. According to the method, high-precision quantification of the resonance stress state of the blade under the multi-field coupling load is realized, and a precise basis is provided for high-cycle fatigue life prediction and reliability design of the turbine blade.

The application provides a power generation performance analysis method for single and double wafer piezoelectric cantilever beams in different shapes, and belongs to the technical field of vibration power supply; solves the problem of low piezoelectric cantilever beam power generation efficiency of the existing single rectangular piezoelectric sheet; and comprises the following steps: S1: five piezoelectric sheets with the same length and thickness but different shapes are formulated; S2: stress of the five piezoelectric sheets with different shapes is analyzed; and S3: COMSOL simulation software is used to set material properties and sizes, and static force analysis, modal analysis and harmonic response analysis are performed on the five cantilever beams with different shapes; the application is applied to piezoelectric sheet power generation performance research.

The invention discloses a vibration sensor layout optimization method, a medium, equipment and a product, and relates to the technical field of sensor layout optimization, and the method comprises the steps: building a finite element analysis model of a tested structure, obtaining the vibration response distribution of the structure in a set frequency range through ANSYS harmonic response analysis, extracting a vibration amplitude cloud picture and a strain energy density cloud picture, and carrying out the analysis of the vibration amplitude cloud picture and the strain energy density cloud picture; preliminarily identifying a vibration sensitive candidate area according to the two cloud pictures and modal node positions; a sensor array is arranged in the candidate area, and vibration signals of the structure under actual excitation are collected; calculating a comprehensive score of each sensor according to the frequency component, the modal participation degree and the signal quality of the vibration signal; sorting the sensor arrangement point locations according to the comprehensive score, and screening an optimal sensor arrangement point location set in combination with clustering analysis; and verifying a layout effect through a vibration test, and carrying out iterative optimization on the sensor layout according to a verification result. According to the invention, the problem of unreasonable point arrangement or excessive point arrangement can be avoided.

The invention relates to a vibration mode test verification and structure optimization method for a paddy field land leveler based on vision measurement and sensitivity analysis. The method comprises the following steps: pasting mark points at key parts and establishing a coordinate system; shooting and analyzing a video by using a high-speed camera to obtain real machine modal data; establishing a parameterized model, carrying out modal analysis, and carrying out comparison verification with actually measured data; performing transient and harmonic response analysis to obtain three-dimensional amplitude; and sensitivity analysis and response surface optimization are carried out by taking the key parameters and the amplitude as optimization targets to obtain optimal design parameters, and an optimization result is obtained through comparison. The invention provides an accurate mechanical structure optimization method based on a real mechanical structure, and belongs to the technical field of agricultural mechanical structure optimization design.

The application discloses a stress correction method and system based on size deviation of an ultrasonic fatigue sample, and comprises the following steps: installing a sample to be detected on an ultrasonic fatigue testing machine; determining whether the sample can vibrate according to the vibration frequency range of the testing machine; if not, reprocessing the sample; otherwise, calculating a corresponding theoretical value of a harmonic frequency by using a preset analytical formula or a harmonic response analysis model according to actual size parameters of the sample, selecting a corresponding stress amplitude calculation method according to the range where the theoretical value of the harmonic frequency is located, and calculating an actual stress amplitude; taking the ratio of the actual stress amplitude of the sample to the theoretical value as a correction coefficient, and correcting a preset stress amplitude of the sample according to the correction coefficient. The application can avoid reprocessing samples in batches due to size deviation of the samples. Moreover, more accurate and safer ultrahigh-cycle S / N curves can be obtained, and dangerous results caused by overestimation of fatigue life due to inaccurate stress can be avoided.

This application relates to a dynamic simulation and evaluation method for portal derricks with scaled-down model verification, applied in the fields of dynamic analysis and safety assessment. The method includes: constructing a parameterized beam-solid coupled finite element model; performing constrained modal analysis and diagnosis on the beam-solid coupled finite element model, generating modal order extraction results and dynamic weak point diagnostic data; constructing a scaled-down model of the portal derrick, and verifying the beam-solid coupled finite element model based on the scaled-down model to generate a verified coupled finite element model; performing typical working condition design and calculating the load spectrum corresponding to the typical working conditions; performing frequency domain harmonic response analysis based on the verified coupled finite element model and dynamic weak point diagnostic data; performing transient dynamic analysis and parameter sensitivity verification to generate full-time-domain dynamic response data; and conducting a comprehensive multi-dimensional dynamic performance evaluation of the portal derrick structure based on the results. This application improves the accuracy of simulation analysis.

This invention discloses a method and system for adaptive adjustment of the excitation frequency of a fluxgate current sensor. The method includes: step a, applying an alternating excitation signal at the current excitation frequency to the excitation winding; step b, acquiring the induced signal output by the induction winding and extracting the second harmonic amplitude based on the induced signal; step c, normalizing the second harmonic amplitude using the current excitation frequency to construct characteristic parameters for characterizing the second harmonic response state of the magnetic core; step d, comparing the characteristic parameters with a preset threshold to determine the second harmonic response state of the magnetic core under the current measured current; step e, based on the response state, maintaining or switching the frequency range of the excitation signal to obtain an updated excitation frequency, so that the magnetic core operates in the effective linear response region of the second harmonic; returning to step a to achieve adaptive adjustment of the excitation frequency according to the measured current.

The invention discloses a towed linear array vibration isolation module bidirectional fluid-solid coupling simulation method. The method comprises the following steps: constructing a finite element structure model of a vibration isolation module; calculating a viscous damping coefficient for an equivalent fluid damping effect; inserting and configuring a spring element with the damping coefficient between adjacent components in the model; performing grid division on the model; applying pretension force for statics analysis; applying simple harmonic excitation based on a static analysis result to perform harmonic response analysis; and extracting vibration responses of the input end and the output end, and calculating a vibration isolation quantity frequency spectrum. Complex fluid domain modeling and calculation in traditional bidirectional fluid-solid coupling are equivalently simplified into setting of a parameterized damping spring in a pure structure model, so that the simulation calculation time is greatly shortened from the hour level to the minute level on the premise that the calculation precision is kept (the average error is about 2.74 dB compared with that of a classical method), and the simulation calculation efficiency is greatly improved. The calculation efficiency is obviously improved; and the resource consumption is reduced.

The invention discloses a transformer vibration sensor array optimization method based on improved harmony search, and the method comprises the steps: constructing a finite element model corresponding to a to-be-optimized transformer, carrying out the harmonic response analysis, and determining a transformer box wall vibration amplitude cloud picture under a key frequency; geometric constraint is carried out on the three-dimensional box wall surface of the transformer to be optimized through front abstraction, and a two-dimensional logic feasible region is formed; constructing a composite objective function for transformer vibration sensor array optimization; in the two-dimensional logic feasible region, executing a harmony search algorithm based on grouped multiplication to obtain an optimal harmony; and converting the two-dimensional logic coordinate combination corresponding to the optimal harmony into a three-dimensional physical coordinate combination on the surface of the three-dimensional box wall, and taking the three-dimensional physical coordinate combination as an optimal layout scheme of the transformer vibration sensor array. According to the method, the optimal coordinate combination of the plurality of vibration sensors on the wall of the transformer box is solved, so that the information capturing capability of a plurality of key vibration modes is the strongest under the condition that the physical constraint condition is met.

The invention provides a marginal plate damping device optimization method based on Monte Carlo simulation and Latin hypercube design, and the method comprises the steps: selecting a certain order of vibration mode of a blade mode to carry out the structure optimization design of a damper based on the vibration mode of the blade mode, and determining the harmonic response frequency range of the blade; processing a blade group substructure by a dual-mode synthesis method, and combining an overall structure matrix through a substructure reduction matrix; obtaining a parameter matrix and a two-dimensional contact surface friction model, and constructing a dynamic equation set with dry friction nonlinearity; a dynamic equation set with dry friction nonlinearity is obtained, and an amplitude-frequency characteristic curve is solved through a harmonic balance method and an arc length continuation method; monte Carlo simulation and Latin hypercube design are carried out, a multi-parameter Monte Carlo simulation analysis program is written, and parameter optimization analysis with the optimal damping effect of the damping device as the target is completed; and obtaining an optimal parameter group to further optimize the original damping structure. The model is processed through a substructure method, and the vibration response of the blade group with dry friction damping under simple harmonic excitation can be predicted.

The application relates to a spring vibration isolation support foundation structure applied to a 300MW-level compressed air energy storage power station and a vibration control and optimization method thereof. The spring vibration isolation support foundation structure comprises a foundation slab, a column and a plurality of spring vibration isolation supports arranged between the foundation slab and the column; the vibration control and optimization method comprises the following steps: a finite element simulation model of the spring vibration isolation support foundation structure is established, and modal analysis and harmonic response analysis are carried out on different spring parameter combinations and structure size schemes by using the finite element simulation model; the stiffness setting and arrangement scheme of the spring vibration isolation support are optimized according to the analysis results; a scale test model is made, and modal test and dynamic response test are carried out; the simulation model is checked and adjusted according to the test results, and the optimized spring vibration isolation support parameters and spring vibration isolation support foundation structure scheme are determined. The application effectively attenuates the vibration of the disturbance force of equipment transmitted to the column.