55 results about "Instability" patented technology

The invention provides an underwater tunnel shield construction excavation face stability evaluation method, system and equipment, and the method comprises the steps: determining an excavation face stability evaluation index based on a shield construction excavation face instability mechanism; dividing the stability of the excavation surface into a plurality of grades, establishing each grade space, and determining the quantitative interval of each evaluation index in each grade; calculating a combined weight of each stability evaluation index by adopting a combined weighting method, and taking the combined weight as a judgment basis of the influence of the evaluation indexes on an evaluation result; and constructing an ideal point evaluation function by adopting an ideal point method so as to represent the membership degree of the to-be-evaluated object to each grade, calculating the grade membership degree of the to-be-evaluated section in each grade of the evaluation system, and determining the stability grade of the excavation surface in the construction process of the evaluation section.

The invention discloses a simulation and prediction method for an instability phenomenon of a dielectric high-elastic thin shell. The method comprises the following steps: S1, constructing a mechanical-electric coupling constitutive model of a dielectric high-elastic material; s2, developing a numerical analysis method of the nonlinear response of the dielectric high-elastic thin shell; s3, simulating the overall instability phenomenon of the structure under large deformation; and S4, outputting the complex mechanical behavior under the predicted force-electricity coupling effect. Compared with the prior art, the method for simulating and predicting the instability phenomenon of the dielectric high-elastic thin shell has the advantages that the method can be used for capturing the complex shape and geometric change of the dielectric high-elastic thin shell and simulating the complex behavior of the thin shell under the force-electricity coupling effect.

The invention relates to an underground engineering surrounding rock instability process simulation test system under a deflection stress field. The system comprises a base, a guide rail, a front cover frame, a rear cover frame, a servo loader, a loading frame, a loading plate, a hydraulic motor, a gear and the like. A plurality of hydraulic loading devices are arranged on the inner surface of a concentric-square-shaped loading frame in the test system, active loading in different directions is provided for a test model, and a chamber surrounding rock stress field is simulated. And a plurality of groups of loading devices are arranged along the inner surface of the loading frame to form a circular loading mechanism. The test model is a circular sample, the test model is driven by a motor to deflect through three surrounding hoops on the surface, the front cover frame and the rear cover frame are connected through a penetrating pull rod and a hydraulic nut, and front and rear face passive constraint is provided for the test model. The simulation test system can realize an underground engineering surrounding rock instability whole-process similar simulation test under stress deflection environment conditions such as different stress field intensities, different included angles between a stress main shaft and a chamber orientation, stress field stress main shaft static and dynamic deflection and the like.

The invention discloses a transient stability control method and system for a power system with equilibrium point continuation after disturbance, and the method comprises the steps: firstly building a steady-state mathematical expression of each dynamic element, and constructing a solving model of a system equilibrium point in combination with a power network equation; then, a homotopy method is introduced, homotopy parameter values at saddle node bifurcation points are solved, and whether balance points still exist in the system or not is judged; and for the condition of system instability, further deriving the sensitivity of the fault parameter of the homotopy curve at the saddle node bifurcation point to each control variable, and optimizing the adjustment strategy of the adjustable parameter in combination with the sensitivity and the control cost. Through a systematic search method, the optimal control scheme with the lowest cost is determined on the premise that the stability margin is met, and therefore the economical efficiency and effectiveness of control measures are improved. The optimization adjustment direction of each adjustable parameter can be accurately identified, the effectiveness of a control scheme is ensured, and accurate operation is provided for stability recovery of a power system.

The invention provides a regulation and control method and system for hole wall instability of a horizontal drill hole in a high ground stress environment, and belongs to the technical field of horizontal drilling. The method comprises the steps that a high ground stress hole wall instability model based on elastic-plastic damage mechanics is established, and a high ground stress correction coefficient, a dynamic damage variable and a multi-field coupling equation are introduced into the model; model parameters are corrected in real time based on measurement while drilling data, and the hole wall stability is dynamically predicted; according to the prediction result, the model prediction error can be greatly reduced through the method, the progressive damage process of the rock mass in the high ground stress environment can be accurately described, and the technical problem of inaccurate prediction of a traditional static model is solved. By correcting model parameters in real time and dynamically adjusting a wall protection strategy, the hole wall instability accident rate is reduced, and the drilling operation safety is remarkably improved.

The invention relates to the field of engineering automation design, and provides a reverse design method and system for deformation control of a foundation pit support structure, basic parameters are determined through a deformation calculation model to accurately calculate the deformation and internal force distribution condition of the foundation pit support structure, so that the design better conforms to the actual condition, and the design efficiency is improved. According to a strength reduction algorithm, safety coefficient calculation is carried out, and a reduction rate total multiplier is introduced, so that parameters in a structural instability critical state better conform to actual conditions, more accurate critical parameter values are obtained, the design effectiveness is further improved, a multi-objective optimization model is designed, and the design efficiency is improved. According to the method, the safety and the economical efficiency are optimized, then the optimized design parameters are comprehensively optimized to meet the requirements of the safety and the economical efficiency, the design effectiveness and the cost economical efficiency are further improved, and the effectiveness and the cost economical efficiency of the foundation pit support structure deformation control reverse design are improved.

The invention is suitable for the field of automobile energy absorption structures, and provides a quantitative characterization method for the oblique pressure stability of a thin-walled tube, and the method comprises the steps: determining a segmentation n value, and dividing the thin-walled tube into n segments; establishing quantitative characterization of the instability behavior; establishing a critical instability angle data set; and constructing an instability prediction model. According to the method, the oblique pressure instability behavior is accurately judged by adopting a quantitative index and a threshold expression form thereof. On one hand, a correlation mechanism of the structural parameters and the instability behaviors is established, so that the instability condition is accurately predicted when the structural parameters change, and the deformation stability and high energy absorption of the structure are ensured. And on the other hand, customized design based on the specific loading angle working condition can be achieved, under the condition that the critical instability angle is given, global regulation and control are conducted in the design space, optimal configuration of the structure is achieved, and design insufficiency and design redundancy are avoided.

This invention belongs to the field of automotive technology, specifically relating to a method and system for analyzing and pre-stabilizing the random instability of electric vehicle braking. The vehicle's drive motor adjusts the driving torque output to the wheels according to drive torque control parameters. The control method includes random instability analysis and pre-stabilization control. This invention differs from traditional solutions that only identify, respond to, and compensate for braking vibration after it has already occurred. Instead, it performs random instability analysis and pre-stabilization control during braking: it determines whether to trigger random instability analysis and pre-stabilization control based on wheel angular velocity. Random instability analysis uses stochastic dynamics theory to solve for the stability boundary of braking vibration, which is conservatively designed by introducing calibration constants. Then, pre-stabilization control obtains drive torque control parameters from the conservative stability boundary, thereby achieving early control before braking vibration occurs.

The invention discloses a weak surrounding rock tunnel face instability mechanism experiment device and method. A stratum environment simulation system is arranged above a model box system, and a tunnel excavation simulation system is installed in the model box system; in the stratum environment simulation system, a base of a hydraulic jack is fixedly arranged on a force transmission plate, a counter-force beam is fixedly arranged on the model box system, and a telescopic rod of the hydraulic jack is rotationally connected with the counter-force beam. According to the invention, a weak surrounding rock tunnel face instability mechanism reduced scale model test is carried out, a hydraulic jack is used for applying a load acting on a force transmission plate, the force transmission plate is used for transmitting the load to a position above a stratum so as to simulate surrounding rock overlying loads at different burial depths, and gradual unloading is carried out through a displacement control method so as to realize tunnel face instability failure whole process simulation. The stratum deformation evolution rule and the geometrical characteristics of a plastic instability area in the tunnel instability state are researched, and the method can be used for simulating the stability and instability characteristics of tunnel faces with different section forms, excavation forms and using functions.

The application discloses a kind of linear transport anti-instability linear module, anti-instability method and related equipment, the linear module includes linear module main body, sliding table and controller, the linear module main body is used to drive sliding table to move, the sliding table is used to support load, further include anti-instability device, the anti-instability device includes driving device and connecting device, the driving device is installed on the sliding table, one end of the connecting device is connected with the driving device, the other end of connecting device is connected with the sliding table;The controller is used to control the connecting strength between sliding table load according to the operating state of the linear module by the anti-instability device.Control the anti-instability device work using controller by obtaining the operating state of linear module and combining the quality data of load, input to controller, to avoid load to dump, and then to the state dynamic adjustment of load and sliding table, improve safety.

The application provides a model test method for simulating progressive weakening of slope strength, and relates to the technical field of geomechanical model test, which comprises the following steps: curing base material to obtain a sample, wherein the sample is a cylinder; selecting a weakening solution by trial method according to a preset model slope evolution time length; performing a weakening test on the model slope by immersing the model slope in the weakening solution; obtaining evolution process information of the model slope, and determining a critical time corresponding to the occurrence of a sliding surface of the model slope; performing a weakening test on the sample by using the weakening solution, and performing an unconfined compression test on the sample when the test time reaches the critical time, so as to obtain the cohesion of the sample; and calculating the critical cohesion of a prototype slope from the cohesion of the sample. In the case that the shear strength of the slope body is insufficient, the strength parameter of the slope body is gradually reduced, and the whole process of the slope body instability evolution is studied.

The invention relates to the field of aero-engine gap design, and discloses a transition state gap quantitative evaluation method and system. The method comprises the following steps of: extracting a working clearance maximum value of a takeoff state, a working clearance minimum value of a landing state and a working clearance maximum value and a working clearance minimum value of a repeated acceleration and deceleration state from working clearance values of a rotor and stator structure in a transition state process, and endowing the four extreme values with independent weights; the weights of other gap data except the four extreme values are given as reference weights, instability coefficient analysis is carried out, and whether the rotor and stator structure meets the transition state gap requirement or not is evaluated; according to the evaluation method, the influence of the maximum value and the minimum value of the working gap of each transition state interval on the instability coefficient is comprehensively considered, the problem that the rotor and stator gap design is difficult to judge due to different local fluctuations of different areas is solved, and the rotor and stator gap before and after the structure improvement design can be evaluated more quickly and accurately; and support is provided for forward design of the gap.

The application provides a control method and a control system of a steer-by-wire system. The method comprises the following steps: constructing a steering system dynamics equation based on a target front wheel running parameter, a configuration parameter and a target damping coefficient of a magneto-rheological damper in a shimmy instability mode, wherein the product of the target damping coefficient and a front wheel rotation speed is equal to the product of an initial damping coefficient of the magneto-rheological damper and a magneto-rheological damper current; obtaining a characteristic equation and all characteristic value expressions based on the steering system dynamics equation; obtaining real-time values of the target front wheel running parameter, a value of the configuration parameter, a magneto-rheological damper current real-time value and a value of the initial damping coefficient; obtaining real part values of all characteristic values of the characteristic value expressions based on the obtained values; and adjusting the magneto-rheological damper current real-time value until the real part values of all characteristic values are not greater than zero to obtain a value of the target damping coefficient, if there is at least one characteristic value whose real part value is greater than zero. The method according to the application can solve the front wheel shimmy problem.

The present invention discloses a method for analyzing instability motion based on bifurcation theory and degree-of-freedom release experiment. First, a degree-of-freedom release experiment system is built in a wind tunnel. Then, by introducing bifurcation theory into the degree-of-freedom release experiment, a continuous algorithm based on control is established to search for branch equilibrium points and periodic closed orbits. Non-invasive control is adopted to transform the branch search process into an optimization process in which the feedback control quantity tends to zero, so that the feedback control can change the stability of the equilibrium branch while maintaining its equilibrium branch position. Thus, stable and unstable equilibrium solutions can be continuously tracked in the experiment to obtain the global stability characteristics of the aircraft, providing a brand-new experimental method for the research on the dynamic characteristics of the aircraft and enabling accurate prediction of the stall departure characteristics of the aircraft.

The invention discloses a dynamic evaluation model attention optimization method for a specific instability mode, and the method comprises the steps: 1) generating a plurality of training samples of different fault types, and extracting the feature information of each bus node after the fault is cleared and the stability label of the sample as original data; 2) collecting unstable mode samples which are difficult to recognize by the model in the training process; 3) identifying key nodes in the sample according to the severity of the influence of the fault on each node in the sample, and marking the key nodes in the sample; 4) according to the training set sample marked with the key nodes, optimizing a TVSA model based on Transform, constructing an attention guidance loss function, and guiding the model to accurately capture key features of an instability mode; and 5) constructing an attention maintenance loss function. According to the method, the evaluation rule of the model is corrected by utilizing the physical information of the key instability node, so that the model fully learns the information related to the stability in the sample and makes correct evaluation.

The embodiment of the present application provides a simulation experimental device for the instability mechanism of slopes under the coupling action of earthquakes and rainfall, which relates to the technical field of earthquake simulation equipment. The simulation experimental device for the instability mechanism of slopes under the coupling action of earthquakes and rainfall includes: a model storage mechanism, a driving transmission mechanism, the transmission mechanism is located at the lower end of the model storage mechanism, and the transmission mechanism vibrates the model in the model storage mechanism, an adjustment mechanism, the adjustment mechanism is located at the lower end of the model storage mechanism, the adjustment mechanism is located in the middle of the transmission mechanism, and the transmission mechanism moves upward and drives the adjustment mechanism to rotate. The cooperation position and state of the cam and the vibration convex plate can be precisely changed, so as to realize the precise adjustment of the vibration amplitudes of the toe, the top and both sides of the slope of the experimental model, meet the requirements for simulating the vibration amplitude of slopes under different experimental conditions, and help to deeply study the influence of the vibration amplitude on the instability mechanism of slopes.

The invention relates to a method for predicting the instability characteristic of a planet row needle bearing retainer, belongs to the technical field of bearing characteristic analysis, and solves the problems that in the prior art, the research on the instability of a bearing retainer is mostly limited to a self-rotation working condition, and prediction is carried out only through a dynamic modeling or testing method; the prediction method comprises the following steps of: firstly, establishing a coordinate system of a planetary gear set, and constructing an index for describing the instability characteristic of the retainer on the basis of the coordinate system; using the kinetic model to form training data of the proxy model; furthermore, a construction and training method of the proxy model is provided, the instability characteristic of the planet row needle bearing retainer can be rapidly obtained, a large amount of dynamic calculation involved in the bearing optimization design process can be replaced, consumption of calculation resources and time can be reduced, and therefore rapid optimization design of the high-performance planet row needle bearing is supported.

Aspects of the disclosure provide a method of mitigating liquid instability in controlled intra-well cross-flow between two, or more, zones accessed by a well. One or more embodiments define new functionalities necessary for dynamic multiphase flow (MPF) simulation to model, mitigate and control liquid instability observed in a well.

The invention belongs to the technical field of fault evaluation, particularly relates to a method, a system and equipment for evaluating the pressure bearing of a fault in a reservoir, and aims to solve the problem that the pressure bearing limit of the fault in the reservoir cannot be accurately obtained. According to the method, the vertical mechanical stability critical pressure of the fault in the reservoir is generated through the fault shear slip pressure and the fault rock instability pressure, vertical data are provided for evaluating the ultimate pressure bearing capacity of the fault in the reservoir, and evaluation is more comprehensive and accurate. The lateral closing pressure limit pressure of the fault in the reservoir is obtained through the simulation model, and the data of the fault limit pressure bearing is supplemented from the lateral angle, so that the evaluation result better conforms to the actual situation. And finally, the ultimate bearing pressure value of the fault in the reservoir is obtained, key data are provided for safe development and reasonable utilization of the reservoir, and then the safety and stability of the underground reservoir are guaranteed.

The invention discloses a grouting control method based on stratum stability evaluation. Relates to the technical field of shield construction grouting. The method comprises the steps that S1, multi-source information in the stratum and shield construction process is obtained; s2, taking the simulation data as a supplementary training set, and training a time sequence prediction model; s3, according to the static parameter data and the dynamic detection data, predicting a stratum response amount through the trained time sequence prediction model, and calculating a stability index S and a risk probability P based on a predicted value; s4, a grouting strategy rule base is constructed, a grouting strategy is generated, and grouting is conducted according to the grouting strategy; according to the method, the evaluation model of the stability index and the risk probability is constructed, quantification and predictability of the stratum stability are achieved, a scientific basis is provided for construction decision making, meanwhile, the multi-stage grouting strategy rule base is established, corresponding grouting schemes can be rapidly selected under different risk grades, and therefore stratum instability or excessive disturbance is effectively prevented.

The invention discloses a support design reliability back analysis method under a deep roadway surrounding rock plate crack instability mode, and belongs to the technical field of mine underground roadway engineering support stability and reliability design. The method comprises the following steps: constructing a limit state equation containing support design decision parameters in a surrounding rock plate crack instability mode based on a sudden change theory; aiming at a preset reliability measurement standard in the support design, solving and calculating support design decision parameters by using a reliability back analysis method, and comparing the result with a result obtained by a traditional reliability positive analysis method to verify the feasibility and rationality of the reliability back analysis method; and on the basis, starting from different preset reliability measurement standards, supporting design under various working conditions in the surrounding rock plate crack instability mode is further carried out through a reliability back analysis method. According to the method, a calculation result which meets a preset reliability measurement standard requirement and has relatively high precision can be obtained, the number of iterative loop operations is small, and solution analysis is convenient and efficient.

The invention discloses a method and system for evaluating the instability possibility of a fixed jacket platform, and the method comprises the steps: configuring scores representing the influence degrees of different factor states and different measure implementation states on the instability possibility for a single factor and a single management and control measure which affect the instability possibility of the platform, and obtaining a score value of a corresponding state of a target platform; classifying each factor of the target platform, respectively taking the factor type and each factor as corresponding evaluation indexes, and analyzing a first relative importance degree of each first evaluation index relative to the instability possibility of the target platform and a second relative importance degree of each second evaluation index relative to each first evaluation index to determine the instability possibility of the target platform. Obtaining a weight value representing the relative importance of each second evaluation index relative to the instability possibility of the target platform; and obtaining the actual instability possibility of the current target platform by using the score value and the weight value. According to the method, the actual instability possibility of the fixed jacket platform can be accurately obtained.

The invention discloses an experimental device and method for researching a high-rotating-speed instability interval of rotor oil. The experimental device comprises a frame, a rotating shaft, an oil tank, a first bearing, a second bearing, a storage plate, a plurality of partition plates and a processor. Round holes are formed in the middle of the top plate and the middle of the storage plate. The first bearing and the second bearing are installed in the round holes of the storage plate and the top plate of the frame through the first bearing seat and the second bearing seat respectively. The rotating shaft vertically penetrates through the first bearing and the second bearing from top to bottom, is connected with the oil tank located between the storage plate and the bottom plate and carries the oil tank to horizontally rotate under the action of the motor. One end of each partition plate is connected with a stand column located in the center of the oil tank, the other end of each partition plate is connected with the inner side face of the oil tank, and the oil tank is evenly divided into a plurality of sub-areas. The device can effectively simulate the vibration phenomenon of oil under the condition of the baffle, the baffle is convenient to assemble and disassemble, and the device is suitable for related research of rotor dynamics about oil rotation vibration.

The present application relates to the technical field of wisdom logistics, and discloses an express package automatic warehousing control method based on digital twinning, which comprises the following steps: obtaining multi-dimensional state data of the package, establishing a virtual model and giving an initial equivalent slip coefficient; generating a space-time difference when tracking the real and theoretical position time sequence; taking the space-time difference as an observation variable for closed-loop iteration, calculating the actual equivalent slip coefficient to update the model; determining the kinetic boundary constraint condition according to the state data and the slip coefficient; based on the space-time difference forward deduction, combining the constraint condition to generate a speed curve and executing it for controlling the running track. The present application updates the equivalent slip parameter through closed-loop iteration, and completes the track trial calculation in combination with the kinetic boundary before issuing the instruction, realizes the dynamic identification and predictability compensation of the nonlinear slip state of the package, helps to solve the attitude instability and cascading interference caused by the regulation lag, and is beneficial to maintaining the warehousing stability in the high-density conveying scene.

The present invention relates to the technical field of aeroengines, and particularly to a method for modeling a mode conversion model of a combined power propulsion system. The method includes establishing a polynomial nonlinear model based on the linear time-invariant models of each engine, and then establishing the NPV model of each engine respectively; establishing a common working model based on the oncoming flow rate during the mode conversion period according to the NPV models of each engine, and considering the coupling of the intake splitter plate angle to the oncoming flow rate to obtain a common working model based on the splitter plate angle; and then applying it to the smooth transition of thrust during the mode conversion period and the realization of a large range of thrusts. The matrix parameters of the NPV system adopted by this modeling method can be changed in real time according to altitude, Mach number and scheduling parameters, which can better describe the strong nonlinear and time-varying dynamic characteristics of aeroengines, effectively solve the modeling difficulty problem caused by the large span of altitude Mach number of combined power engines, and lay a foundation for problems such as the control design and instability determination of aeroengines.

The invention discloses an anti-rod-falling device based on inertia detection and a dynamic balance algorithm, and relates to the technical field of automatic control. The device comprises an anti-falling rod body, a sensor system and a control system, the sensor system is used for acquiring inertial state parameters of the rod body of the anti-falling rod in real time and constructing inertial state parameter vectors; the control system is used for analyzing the real-time energy-momentum coupling state of the rod body of the anti-falling rod based on the obtained inertial state parameters so as to obtain the real-time total energy of the rod body of the anti-falling rod, and then calculating the stability tensor of the rod body of the anti-falling rod on the differential manifold; calculating the maximum Lyapunov index by combining the inertial state parameter vector, and predicting the instability prediction time of the rod body of the anti-falling rod; and according to the instability prediction time, the optimal compensation force needed for preventing the anti-falling rod body from falling is calculated, and the motion of the anti-falling rod body is controlled. The method has higher accuracy, adaptivity and reliability.

The application provides a flexible machine arm instability suppression method and system based on SMA driving, comprising the following steps: step 1: analyzing the constitutive property of SMA and the influence of the discontinuous output force characteristic introduced by the SMA on system dynamics; step 2: combining the physical configuration of the flexible machine arm to construct a universal state equation; step 3: introducing trajectory constraint conditions to plan a reference trajectory and output a desired trajectory; step 4: combining the obtained state equation and the desired trajectory to reconstruct an error dynamics equation, designing a sliding mode control surface and a sliding mode reaching law, and giving a sliding mode control amount of a multiple-input multiple-output (MIMO) system, so as to output a MIMO time sequence control amount while meeting the trajectory tracking accuracy requirement. Through the trajectory constraint method, the application can effectively avoid the problems of control algorithm mismatch or model instability caused by system parameter uncertainty, and ensure that the flexible machine arm works in a model-known and controllable region.

The invention discloses an intelligent monitoring method and system for the safety state of an efflux pump, and relates to the technical field of industrial equipment safety, the system collects working condition data of the efflux pump in real time through a sensor group installed on the efflux pump, and pre-processes the working condition data to construct a fluid state data set and a load evolution data set; medium disturbance evaluation is carried out by calculating a medium disturbance leading edge index VPI and a medium disturbance response threshold TH, when shear disturbance is evaluated to be formed, a load evolution analysis instruction is executed, a load lag evolution index LEI is calculated based on structure response data, and then a joint instability risk index UDR is calculated in combination, so that the shear disturbance is evaluated to be formed. And performing comprehensive instability response evaluation with a set first joint instability boundary threshold UA and a set second joint instability boundary threshold UB, and executing a grading safety adjustment strategy according to a comprehensive instability response evaluation result. According to the system, early recognition, dynamic evaluation and closed-loop response of the abnormal state of the outer conveying pump can be achieved, and the safety and stability of operation of the conveying system are improved.

The present invention proposes a multi-stage high-speed compressor aerodynamic instability early warning method and system based on deterministic learning. Sensor measuring points are arranged in a multi-angle manner combining full ring and sector in the multi-stage high-speed compressor to obtain pulsating pressure data in the aerodynamic instability test. The internal nonlinear dynamic system of the aerodynamic instability is learned based on the pulsating pressure data using the deterministic learning modeling method. The learning result is a holographic expression of the fast time-varying instability mode, which can depict the more essential and comprehensive dynamic characteristics of the development process of the complex dynamic phenomenon of aerodynamic instability and has good interpretability. On this basis, an online early warning method for aerodynamic instability is developed. Only the pulsating pressure data of a single measuring point of a multi-stage high-speed compressor can give a warning signal before the instability occurs. Therefore, it has certain application value and is expected to provide a real-time monitoring method with practical significance for the safe and stable operation of high-performance aircraft engines.

The application discloses a high flexible structure two-degree-of-freedom coupled galloping critical condition prediction method and system based on regular perturbation high-order expansion. The method comprises the following steps: collecting structure physical and aerodynamic parameters; establishing a motion control matrix equation based on modal displacement; using a regular perturbation method to expand eigenvalues and displacement solutions into power series; according to whether initial crosswind and downwind frequencies are the same, explicit analytical solutions of modal frequencies, damping ratios and amplitude ratios are derived respectively; after solving the modal frequencies by iteration, the damping ratio is directly calculated, and the galloping critical wind speed is determined according to the change of the damping ratio from positive to negative. The application only needs to iterate the modal frequencies, and has high calculation efficiency; the total damping can be decomposed into linear superposition of structure, non-coupling and coupling components, and the instability mechanism is clearly revealed; and the application is suitable for various working conditions such as the same or different frequencies, and has high prediction accuracy, thereby providing a reliable basis for high flexible structure wind resistance design.