63 results about "Resonance vibration" patented technology

The present invention discloses a suspension structure and parameter design method for suppressing high-frequency vibration of a vehicle body by three measures in the automotive field. An existing stiffness-damping inertia autonomous controllable suspension and a wheel high-frequency dynamic vibration absorber are combined to form a suspension for suppressing high-frequency vibration of a vehicle body by three measures. On the basis of vehicle body mass, wheel mass and equivalent stiffness, the mass of the wheel high-frequency dynamic vibration absorber and the minimum stiffness of the suspension in comfort mode are determined according to automobile design requirements. The damping and inertia of the inertia tube, the stiffness and damping of the wheel high-frequency dynamic vibration absorber are optimized with the goal of minimizing the objective function. When the vehicle is traveling on a bad road, the high-frequency vibration suppression measure transmitted from the wheel to the vehicle body is expanded to three measures of wheel high-frequency dynamic vibration absorption, vibration isolation and anti-resonance vibration reduction that work in coordination with each other, so that the advantage of the wheel high-frequency dynamic vibration absorption measure in cutting the peak of the high-frequency vibration of the vehicle body and the advantage of the anti-resonance vibration reduction measure in narrowing the bandwidth of the high-frequency vibration frequency band of the vehicle body are organically combined, and the vibration of the vehicle body in the high-frequency vibration band is completely flattened.

An ultrasonic transducer array of this invention includes a rigid support plate with a through-hole group including through-holes, a flexible resin film fixed to the support plate so as to cover the through-holes, and piezoelectric elements fixed to the flexible resin film so that middle portions overlap the corresponding through-holes and peripheral portions overlap the support plate, wherein the piezoelectric elements include transmission piezoelectric elements forming transmission transducers that generate ultrasonic waves in response to driving voltage signal having a predetermined driving frequency and one or plural reception piezoelectric elements forming one or plural reception transducers that generate reception voltage signals in response to ultrasonic waves, and wherein the transmission transducer is of a non-resonant type that generates ultrasonic wave without resonant vibration in response to the driving voltage signal and the reception transducer is of a resonant type that performs resonant vibration in response to ultrasonic wave having a frequency corresponding to the driving frequency.

The invention provides a self-adaptive vacuum defoaming process optimization method based on an intelligent control system, and aims to solve the problems of micro-bubble residue, too high energy consumption and the like caused by the fact that a traditional defoaming technology cannot adapt to liquids with different viscosities, and accurate defoaming is realized through a multi-dimensional sensing technology and strategy generation and regulation. Presetting a high-precision vacuum parameter and a viscosity grading strategy; establishing a liquid characteristic vector model by adopting a YOLOv7 and Hough transformation algorithm, and matching a historical optimal strategy in combination with weighted cosine similarity; generating a defoaming strategy based on the pre-training network and a multi-objective optimization algorithm, and verifying the defoaming strategy in the virtual environment; defoaming is carried out in four stages, and efficient foam breaking is achieved through sectional PID control, resonance vibration and cooperation of a two-stage pump; a Kalman filtering algorithm is integrated, pressure, temperature and vibration data are fused, and vacuum pump power and a heating strategy are adjusted; and constructing a multi-index evaluation system, and driving strategy iterative optimization through a reward signal.

A powder magnetron sputtering resonance sample table comprises a supporting base capable of being placed in magnetron sputtering equipment, an audio oscillator is arranged on the supporting base, a sample disc is arranged on the audio oscillator and located under a sputtering head in the magnetron sputtering equipment, and the distance between the sample disc and the sputtering head in the magnetron sputtering equipment is adjustable; through vibration of an audio oscillator, low-frequency high-strength sound wave vibration and macroscopic resonance vibration mixing of a sample disc, uniform mixing of materials is realized; in the mixing process, resonance is generated through an audio oscillator and a sample disc, a mixing container generates low-frequency large-acceleration vertical vibration and macroscopic vibration dispersion under the condition of small input energy, so that material particles move in a staggered mode in the vertical direction and the transverse direction, the contact frequency between the particles is increased, and dispersion of the particles is further promoted; therefore, it is guaranteed that each face of powder particles can bear target material atoms in the sputtering process, and uniform coating of the surface of powder is achieved.

The invention discloses an all-series recovery process for waste lithium ion batteries, which belongs to the field of lithium battery regeneration and comprises the main process steps of pretreatment of the waste lithium ion batteries, electrolyte recovery through microwave baking, obtaining of positive plates and negative plates through eddy current separation and separation of positive and negative black powder and metal foil through infrared irradiation. Wherein the electrolyte is recovered through microwave baking, so that the electrolyte can be quickly vaporized and then condensed and recovered under the action of microwaves by utilizing the strong polarity of the electrolyte, and therefore, the electrolyte can be efficiently separated, the removal effect is more thorough, and the problem of electrolyte pollution cannot be generated in the process. According to the infrared irradiation separation process, the absorption capacity of different adhesives to different infrared wavelengths can be utilized, and the molecular chains of the adhesives are broken and the positive and negative electrode powder and the metal foil can be automatically stripped by adjusting the irradiation infrared band and generating resonance vibration, so that the residues of the adhesives are greatly reduced; the recovery rate of the waste lithium ion battery and the purity of the recovered material are improved.

The invention provides a blade crack identification method for a mistuned blisk. The method comprises the following steps: carrying out geometric model modeling on a blisk and a blisk containing cracks under a random detuning condition; a blisk model is simplified, a blisk lumped parameter model is constructed, response analysis is conducted on the blisk system containing crack detuning on the basis of a non-linear contact force mode, and steady-state response of all blades is obtained through calculation and analyzed; finite element models are established for the three-dimensional geometry of the complete blade and the crack-containing blade; performing resonance state and non-resonance state vibration response on the intact bladed disc and the bladed disc containing the breathing crack in the detuning state, and analyzing corresponding frequency domain response; based on the vibration response characteristics of the blisk, the harmonic index of the blisk and the harmonic index of the blisk blade are defined, the positioning and identification of the crack of the blisk containing the crack can be effectively carried out by using the harmonic index, and a basis and guidance are provided for the identification of the crack in the blisk.

The utility model relates to the technical field of dampers, and discloses a double-spring viscous fluid damper, which comprises a cylinder body, a piston, a piston rod and a piston rod, the damper piston is arranged at a cylinder liner of the cylinder body; the piston rod is arranged on the damper piston and penetrates through the cylinder body; the resonance structure is arranged at one end of the piston rod and arranged on the cylinder body, and the resonance structure is used for improving the clamping force of resonance vibration reduction; the second connector is arranged at the end, away from the piston rod, of the cylinder body, external threads are formed in the outer surface of the cylinder body, the outer surface of the external threads is movably connected with the resonance structure, the resonance structure comprises a first connector, and the first connector is fixedly connected with one end of the piston rod. According to the utility model, the clamping force of resonance vibration reduction can be improved, and the vibration reduction control effect can be enhanced.

A loudspeaker transducer diaphragm or cone (e.g., 201, 301 or 401) is configured with arcuate protrusions that project distally from the main forward or distal surface 230 to provide stiffening and a break-up of resonant vibration modes when the loudspeaker is in use. The protrusions (e.g., 210, 310 or 410) are convex on one surface 230 and concave on the opposite surface 234, so their average thickness is similar to the frustoconical areas of the cone, i.e. they are shell-like in nature rather than solid mounds or walls. The protrusions 210 are generally curved as they run radially from the inner opening 204 to the outer peripheral edge to encourage modal break-up (suppressing strong vibrational modes, e.g., as in region 155).

A multi-resonance flextensional low frequency acoustic projector of the present disclosure includes a piezoelectric actuator, a plurality of staves attached to an outer surface of the piezoelectric actuator to convert longitudinal vibration generated by the piezoelectric actuator into lateral vibration perpendicular to the outer surface of the piezoelectric actuator; and an acoustic window surrounding an exterior of the staves and water-tightening the inside of the projector. The plurality of staves is configured in shapes different from each other to generate two or more types of resonance vibration modes, so there is an effect of allowing low frequency acoustic transmission in a wide frequency band.

The utility model discloses a stepping motor shock pad, which relates to the technical field of peristaltic pump noise reduction and comprises a front support plate, an elastic connector and a rear support plate. The front supporting plate is connected with the stepping motor through four threaded holes, the rear supporting plate is connected with the motor support through four through holes, the front supporting plate and the rear supporting plate are arranged in a staggered mode at 45 degrees, and screw interference is avoided. The elastic connecting body is arranged between the front supporting plate and the rear supporting plate and used for connecting the front supporting plate and the rear supporting plate and playing a role in elastic damping. The elastic connecting body is integrally connected with the front supporting plate and the rear supporting plate, and high connecting strength and stability are achieved. By optimizing the structural design and material selection, resonance vibration is effectively isolated, noise is reduced, and the vibration isolator is suitable for various devices and application scenes and has good universality and market prospects.

The invention relates to a residual stress homogenizing device for an aluminum alloy plate, and belongs to the technical field of mechanical manufacturing processes. Comprising a vibration aging mechanism, a plurality of infrared heating mechanisms, an aging platform mechanism, a displacement mechanism and an aluminum alloy plate workpiece, the aluminum alloy plate workpiece is arranged on the vibration aging mechanism, the vibration aging mechanism and the displacement mechanism are both arranged on the aging platform mechanism, the infrared heating mechanism is installed on the displacement mechanism in a sliding mode, and the infrared heating mechanism is rotatably arranged above the aluminum alloy plate workpiece. According to the device, vibration aging is utilized to resonate the workpiece to obtain energy, and an infrared heating mechanism is combined to enable the aluminum alloy plate workpiece to generate phase change and tissue yield change at a resonance vibration mode pitch line, namely a position with relatively weak vibration energy, so that the effect of integrally reducing and homogenizing residual stress is achieved.

The invention relates to a vibration absorber (1, 1') for resonance vibrations of rotating bodies, in particular rail wheels, having a plurality of vibratory tongue plates (4, 4') which are separated from one another by intermediate layers (5, 5') of damping material, are rigidly connected to the rotating body at at least one point and are coupled to the rotating body over a large area in the remaining region, wherein the individual tongue plates (4, 4') and the individual intermediate layers (5, 5') of damping material are coordinated with one another in such a way that the tongue plates (4, 4') vibrate at the resonance frequency, to be damped, of the rotating body and the individual tongue plates (4, 4') vibrate such that they compress and relax the damping material of the intermediate layers (5, 5'). In order to enable the vibration properties and damping properties to be set flexibly while ensuring simple manufacturing and reliable attachment of the damping elements, it is proposed that at least one of the tongue plates (4, 4') has a through opening (9, 9') through which the two adjacent intermediate layers (5, 5') of damping material are connected to one another to form a single-piece damping element.

The present invention is provided with a vibration plate (110), at least one case (120), at least one ultrasonic vibrator (130), and at least one resonator (140). The at least one case (120) extends in the longitudinal direction and is joined to the diaphragm (110). The at least one ultrasonic transducer (130) is attached to each of the at least one housing (120) and faces the vibrating plate (110) with a gap therebetween. The at least one resonating plate (140) faces the vibrating plate (110) on the opposite side of the vibrating plate (110) from the at least one housing (120) with a gap therebetween, and extends in the long axis direction. The vibrating plate (110) resonates and vibrates in a direction orthogonal to the vibrating plate (110) at a phase opposite to that of the at least one ultrasonic vibrator (130). The dimension of the inner side of the at least one housing (120) in the long-axis direction is larger than the dimension of the inner side of the at least one housing (120) in the short-axis direction orthogonal to the long-axis direction. If the wavelength converted from the drive frequency of the at least one ultrasonic transducer (130) is lambda, lambda / 2 air resonance can be generated in the gap in the minor axis direction.

The invention provides an additional locally slotted acoustic black hole board, which is mounted on a main board to be damped and comprises a black hole board main body and a damping layer, the black hole board main body is fixed on the main board to be damped and comprises a uniform thickness area and one or more acoustic black hole areas, one or more weight reduction grooves are formed in the uniform thickness area, and the damping layer is arranged on the damping layer. And a damping layer is arranged on the acoustic black hole area. According to the additional type locally-slotted acoustic black hole plate, by forming the weight reducing grooves in the non-key area of an original additional acoustic black hole plate structure, redundant materials are removed, the weight reduction of an additional structure is achieved, meanwhile, the local resonance vibration reduction effect and the energy gathering capacity of the acoustic black hole effect on bending waves are kept, and the acoustic black hole plate has the advantages of being simple in structure and convenient to use. Finally, broadband vibration control of the mainboard is achieved under the low additional mass, the overall structure meets the requirement for light weight, and the structure is particularly suitable for a plate-shaped system sensitive to the additional mass.

The invention discloses a vibration reduction device and method for a CPU heat dissipation module. The vibration reduction device comprises a CPU body, a mainboard and a radiator and further comprises a buckle, a spring screw, a mounting sleeve, a primary vibration reduction part and a secondary vibration reduction part. In the working state, the abutting force of the periphery of the primary vibration reduction piece and the circumferential wall of the mounting sleeve is larger than that of the top protruding part and the inner circumferential wall of the top of the mounting sleeve. The abutting force between the inner peripheral wall of the bottom of the secondary damping piece and the rod bottom of the spring screw is larger than that between the inner peripheral wall of the top of the secondary damping piece and the rod upper portion of the spring screw. And the cavity parts of the primary vibration reduction piece and the secondary vibration reduction piece are in an expansion state. The radiator has the advantages that resonance of the main board and the radiator is weakened through the primary vibration reduction part and the secondary vibration reduction part, and the influence of resonance vibration is weakened.

A multi-resonance flextensional low frequency acoustic projector of the present disclosure includes a piezoelectric actuator; a plurality of staves attached to an outer surface of the piezoelectric actuator to convert longitudinal vibration generated by the piezoelectric actuator into lateral vibration perpendicular to the outer surface of the piezoelectric actuator; and an acoustic window surrounding an exterior of the staves and water-tightening the inside of the projector. The plurality of staves is configured in shapes different from each other to generate two or more types of resonance vibration modes, so there is an effect of allowing low frequency acoustic transmission in a wide frequency band.

This biofeedback device for vocal sound resonance vibration includes: a sensor unit which detects a vocal sound of a user and records the vocal sound as an electrical signal; a signal processing unit which processes the electrical signal recorded by the sensor unit; an amplification unit which amplifies the signal processed by the signal processing unit; a sound wave conversion unit which converts the signal amplified by the amplification unit into sound waves and transmits same to an auditory organ of the user as vibration or sound; and a control unit for controlling at least one of the sensor unit, the signal processing unit, the amplification unit, or the sound wave conversion unit to store a signal and perform a function. The control unit controls to feed the characteristics of the original vocal sound or the signal of the vocal sound back to the user in the form of sound or vibration.

The present application relates to the technical field of metallurgy, and discloses a steel ingot dynamic solidification system and a solidification method, wherein the dynamic solidification system comprises a pouring system, a vibration excitation device and a controller, the pouring system comprises a pouring base, multiple sets of steel ingot molds and a pouring pipe, the multiple sets of steel ingot molds are fixed on the top of the pouring base, and the pouring pipe is in communication with the multiple sets of steel ingot molds; the vibration excitation device is a non-insertion type vibration excitation device, the vibration output end of the vibration excitation device is connected with the pouring base; and the controller is used for adjusting the vibration excitation frequency of the vibration excitation device according to the overall mass of the vibration receiver composed of the pouring base, the pouring pipe and the multiple sets of steel ingot molds, so that the vibration excitation frequency of the vibration excitation device is equal to the natural frequency of the vibration receiver to realize the resonance of the pouring system. The present application directly applies the resonance vibration excitation force to the pouring base by using the vibration excitation device, realizes multi-mode resonance, improves the production efficiency, does not invade the molten steel, fundamentally avoids the burning of the vibration rod and the risk of the falling and remaining of the attached oxide skin and coating, and guarantees the purity of the steel ingot.

The application discloses a kind of stiffness self-tuning's semi-active-active compound intelligent vibration absorber based on voice coil motor active force compensation, belong to vibration control technical field, for solving the problem of existing vibration absorber tuning band narrow, stiffness regulation and active integration low, large volume.This application includes bottom plate, moving mass, self-tuning variable stiffness mechanism and active mechanism;Self-tuning variable stiffness mechanism includes stepper motor, with reverse thread's step screw rod, upper sliding nut, lower sliding nut, pairs of leaf spring and linear slide rail slider assembly;Active mechanism is coaxially arranged voice coil motor on the upside.The stepper motor drives screw rod rotation, drives two opposite rotating sliding nut relative motion, changes leaf spring working span to realize stiffness online self-tuning, and voice coil motor provides active control force.The application is compact in structure, and high in integration, can realize wide-frequency adaptive resonance vibration absorption, has passive tuning stability and active control wide-frequency adaptability, and has excellent damping effect.

The invention relates to a vibration reduction type light steel-light concrete floor structure for a steel structure modular building, the steel structure modular building and a manufacturing method, and the floor structure comprises side keels which form a side keel frame matched with a bottom frame beam of the steel structure modular building; the main keels are arranged in the side keel frame in parallel at intervals in the transverse direction, the two ends of each main keel are connected with the longitudinal side keels respectively, and a vibration reduction cavity is formed in each main keel in the length direction of the main keel; the resonance vibration reduction device is embedded in the vibration reduction cavity in the length direction of the main keel; the steel meshes are laid on the upper surface and the lower surface of the side keel frame; the light concrete is poured in the frame space defined by the side keels and the main keels, and concrete protection layers are formed on the upper surface and the lower surface of the light concrete. The vibration reduction type light steel-light concrete floor slab structure is light in weight, meanwhile, floor slab vibration caused by pedestrian loads can be reduced, the requirements for bearing capacity and comfort are met, and the weight of the module structure is greatly reduced.

The present invention relates to a method for detecting disturbances in components of ultrasonic vibration systems comprising the steps A) Providing an ultrasonic vibration system with at least one converter and one sonotrode as components that can be brought into a resonant vibration with a natural frequency f0, B) Applying a high-frequency alternating voltage with frequency f to the converter, C) Recording the actual temperature of a selected component and / or recording the actual vibration mode of a selected component, D) Assess the component as faulty if the actual temperature and / or the actual vibration mode meets a predefined criterion.

The disclosed damper is designed to minimize first-mode vibration wind-induced resonance in tubular steel lightning masts used in electric substations. It employs a hanging cable system threaded through washers and variously sized caster wheels, addressing resonance vibrations that can lead to structural fatigue and failure. This design ensures consistent engagement with the structure, even with tapered walls, by utilizing different diameter caster wheels at various elevations.

The invention discloses a micro-boring deep small hole automatic tool setting method based on resonance excitation, and relates to the technical field of micro-boring deep small hole machining tool setting detection.The method comprises the steps that an accurate micro-boring tool resonance mode is obtained through simulation and experimental analysis methods, and the resonance amplitude and the resonance frequency in the cutting depth direction are extracted; on the premise that the feeding of the machine tool is far away from the resonant frequency, an external resonant vibration source is adopted to excite the tip of the micro-boring cutter to generate resonance in the cutting-in direction, the maximum resonance amplitude exists at the tip, and the tip of the micro-boring cutter gradually approaches the inner wall surface of the deep small hole through the micro-feeding amount feeding of the micro-boring cutter in the cutting-in direction; the detection and the primary alarm of a tool touch signal are realized through a conductive and magnetic conductive path connected between the deep small hole metal piece and the tool nose of the micro-boring tool, namely, the secondary feeding distance of the micro-boring tool in the cutting depth direction is determined to be not greater than the distance corresponding to the maximum resonance amplitude at the tool nose; according to the method, the tool setting sensitivity and precision of the method can be improved through subdivision processing of the touch electromagnetic alarm signal.

The disclosed damper is designed to minimize first-mode vibration wind-induced resonance in tubular steel lightning masts used in electric substations. It employs a hanging cable system threaded through washers and variously sized caster wheels, addressing resonance vibrations that can lead to structural fatigue and failure. This design ensures consistent engagement with the structure, even with tapered walls, by utilizing different diameter caster wheels at various elevations.

The invention discloses a method for operating a measuring device, the measuring device having a measuring sensor, the measuring sensor having an oscillator, the oscillator having at least one vibrating measuring tube for guiding a medium, the measuring sensor being in particular a measuring sensor for determining the mass flow, density and / or viscosity of the medium; the method comprising the following steps: determining a current value of a resonant frequency of a vibration mode of the oscillator (110); exciting a non-resonant vibration (120) at an excitation frequency different from the current value of the resonant frequency; and determining an amplitude (130) of a sensor signal representing the non-resonant vibration; characterized in that, in order to determine the amplitude of the sensor signal of the non-resonant vibration, the sensor signal of the vibration sensor of the oscillator is determined by means of a low-pass filter having a time constant of not less than 1000 period lengths of the non-resonant vibration, for example not less than 10000 period lengths of the non-resonant vibration, more specifically not less than 100000 period lengths of the non-resonant vibration. The invention also relates to a measuring device for carrying out the method.

The invention discloses a vibration frequency test bench and method for a blade disc, and the test bench comprises a rotor mechanism which is used for driving the blade disc to vibrate, a drive device which is used for driving the rotor mechanism, and a vibration detection device. The rotor mechanism comprises a bearing support, a rotor shaft rotationally arranged on the bearing support and a driven bevel gear used for driving the rotor shaft to rotate, the driving device comprises a motor support, a driving motor arranged on the motor support and a driving bevel gear arranged on an output shaft of the driving motor, and the blade disc is installed on the rotor shaft. The driving bevel gear is meshed with the driven bevel gear, exciting force under meshing frequency is generated through transmission errors of the driving bevel gear and the driven bevel gear so as to excite resonance of the blade disc in all directions, and the vibration detection device is used for detecting the vibration frequency of the blade disc; the device is ingenious in structure, can completely cover the frequency measurement requirement of the measured blade disc, can accurately determine the vibration frequency of the blade disc, and is suitable for blade discs of different models.

The resonance-free vibratory hammer comprises a machine shell, the machine shell is rotationally provided with a plurality of eccentric blocks, the eccentric blocks are rotationally arranged in the machine shell through rotating shafts, the rotating shafts are in linkage connection, and the machine shell is provided with a driving oil cylinder located between the rotating shafts. The driving oil cylinder is in linkage connection with the rotating shafts so that the driving oil cylinder can adjust the phase angle of the eccentric blocks, the rotating shafts are evenly distributed on the upper side and the lower side of the cylinder body so that the eccentric blocks can be vertically arranged on the machine shell, the machine shell provides a mounting carrier for all components, the eccentric blocks are rotationally arranged in the machine shell through the rotating shafts, and the rotating shafts are in linkage through gears. The phase angle of the eccentric block is adjusted through the driving oil cylinder, so that the starting vibration frequency crosses a resonance area, resonance is avoided, and resonance harm is reduced.

The invention discloses an integrated alkane olefin efficient gasifier, which belongs to the technical field of gasifiers, and comprises a support frame, a plurality of finned tubes are fixedly connected in the support frame, the bottom of the support frame is connected with a vibration base, when strong airflow passes through the finned tubes, the finned tubes resonate, the vibration base drives the finned tubes to shake through the support frame, and the finned tubes are separated from the vibration base. And the top of the supporting frame is fixedly connected with a wind receiving plate, the wind receiving plate receives wind energy and transmits the wind energy to the vibration base, and therefore the shaking amplitude of the finned tube is further amplified. Through a multi-stage vibration amplification mechanism, the vibration amplitude of the finned tube is remarkably enhanced, effective defrosting is achieved, collection and transmission of natural wind energy are optimized through the design of the wind receiving plate, the vibration efficiency is improved, stable operation of a vibration system is ensured through the elastic assembly, the influence on the supporting frame is reduced, and the defrosting stability of equipment is improved.

The present invention relates to a multi-line spectrum wave blocking vibration isolator and a design method, wherein the multi-line spectrum wave blocking vibration isolator comprises: a vibration isolation support (1) and a local resonance structure (2); the vibration isolation support (1) is provided with a plurality of vibration isolation supports around the local resonance structure (2); the vibration isolation support (1) and the local resonance structure (2) are both made of metal; the vibration isolation support (1) comprises: two symmetrical and spaced vibration isolation support parts (11); one end of the vibration isolation support part (11) is a fixed end connected to the local resonance structure (2), and the other end is a support end away from the local resonance structure (2); the support ends of the two vibration isolation support parts (11) are protruded in directions away from each other. The vibration isolator of the present invention has a local resonance vibration isolation characteristic, wherein the resonance of the local resonance structure is confined to the entire vibration isolator and will not be transmitted to the vibration isolation object, thereby effectively ensuring the vibration isolation performance of the present invention.

The present application provides a method for identifying the dynamic vibration mode of an aero-engine blade based on the inner product correlation, including: arranging a plurality of stress measurement points on the blade to obtain the resonance speed, resonance frequency and measured stress value of the blade, and expressing each measured stress value as a measured stress vector; carrying out dynamic frequency analysis under different speed conditions to obtain the frequency values and nodal stresses of each order under each speed condition, and establishing a dynamic frequency database; selecting the dynamic frequency speed closest to the resonance speed from the dynamic frequency database, and selecting a plurality of frequencies within a predetermined range from the resonance frequency as the suspected vibration mode frequencies; respectively selecting the calculated stress values of a plurality of stress measurement points in the suspected vibration mode, and expressing them as the calculated stress vectors of each suspected vibration mode; calculating the inner product correlation between the measured stress vector and each calculated stress vector; determining the most relevant inner product correlation between the calculated stress vector and the measured stress vector according to the magnitude, and the suspected vibration mode frequency corresponding to the most relevant inner product correlation is the vibration mode frequency corresponding to the resonance vibration mode.