140 results about "Particle damping" patented technology

The invention relates to an active and passive hybrid vibration isolation test platform and a working method thereof. The active-passive hybrid vibration isolation test platform is composed of a main body device, a vibration sensing device, a vibration control device and an active-passive hybrid vibration isolation device. The active and passive hybrid vibration isolation devices are symmetrically arranged on the two sides of the armature and comprise supports, particle dampers and electromagnets, the electromagnets are supported above the armature through the supports, the supports are of hollow structures, damping particles are filled in the supports, and coils are wound on the electromagnets. A suspension controller in the active vibration isolation module controls the current of an electromagnet coil so as to attenuate a low-frequency vibration signal and realize active vibration control; and under the combined action of particle damping in the passive vibration reduction module, medium-frequency and high-frequency vibration signals are attenuated, and passive vibration control is realized. Compared with the prior art, the device has the advantages that the adjusting range of elasticity and damping parameters is expanded, and the vibration isolation stability is improved.

The invention relates to the technical field of vibration isolation and reduction engineering, and discloses a modular multi-mechanism vibration isolation, energy consumption and vibration absorption integrated device and a control method thereof.The modular multi-mechanism vibration isolation, energy consumption and vibration absorption integrated device comprises a support, a plurality of corrugated plates are fixedly connected to the interior of the support, and magnetorheological dampers are fixedly connected to the bottoms of the inner walls of the corrugated plates; a magneto-rheological damper is fixedly connected to the top of the support, a dynamic vibration absorber is fixedly connected to the top of the magneto-rheological damper, a particle damper is fixedly connected to the top of the dynamic vibration absorber, a control unit is arranged on the outer side of the support, the magneto-rheological damper comprises a first shell, and a piston rod is fixedly connected to the inner wall of the first shell. By integrating multiple mechanisms such as corrugated plate vibration isolation, particle damping energy consumption, dynamic vibration absorber vibration absorption and magneto-rheological damper intelligent control, all-directional vibration suppression is achieved, under different frequencies and vibration working conditions, all modules work cooperatively, the vibration reduction effect is greatly improved, and the vibration isolation efficiency gt within the broadband of 20-2000 Hz is ensured; 85%.

The utility model discloses a damping base of a circular knitting machine, which belongs to the field of circular knitting machines, and comprises a base, a top cover, a flexible pressing block, frame bodies and particle damping bodies, a plurality of mounting grooves are formed in the base, openings of the mounting grooves face upwards, the frame bodies are detachably inserted in the mounting grooves, the particle damping bodies are filled in the frame bodies, and the flexible pressing block is arranged on the top cover. The top of the base is detachably connected with a top cover, a plurality of flexible pressing blocks are fixed to the bottom of the top cover and extend into the mounting groove, and when the frame is mounted in the mounting groove, the flexible pressing blocks extend into the frame and extrude the particle damping body. Due to the fact that the frame body is detachable, the damping dense area can be adjusted, the installation position of the frame body can be adjusted according to the maximum vibration and noise transmission area under different conditions, and the best damping and noise reduction effect is guaranteed.

The utility model discloses a damping performance testing device for a particle damper, which is characterized in that a fixed end of a particle damper mounting substrate of the testing device is arranged on a fixed bracket, and a free end of the particle damper mounting substrate is arranged far away from the fixed bracket; an excitation unit is used for being connected with an excitation input point of a particle damper mounting substrate so as to send an excitation signal to the particle damper mounting substrate; a detection unit is arranged on a particle damper mounting substrate and is used for detecting acceleration change generated by an excitation signal; the control unit is used for obtaining a first modal damping ratio of the particle damper mounting substrate and a second modal damping ratio after the particle damper to be tested is placed according to a vibration frequency response curve obtained by the acceleration change. By applying the scheme, the first modal damping ratio and the second modal damping ratio are compared, so that the test precision can be effectively improved, and a good technical guarantee is provided for evaluating the damping performance of the particle damper.

The invention discloses a damping rubber composition for a track fastener and a preparation method thereof. The damping rubber is characterized by being prepared from the following raw materials in parts by weight: 100 parts of composite rubber, 25-35 parts of damping particles, 15-20 parts of sheet structure filler, 5-10 parts of a plasticizer, 5-10 parts of a tackifier, 3-5 parts of high-temperature-resistant fibers, 2-4 parts of a vulcanizing agent, 3-5 parts of an activating agent, 2-2.5 parts of an accelerant and 1-3 parts of an anti-aging agent, the composite rubber is a compound of ethylene propylene diene monomer, natural rubber and nitrile rubber; the damping particles are elastic particles obtained by filling aerogel nanopores with asphalt and a glycidyl methacrylate modified elastomer. The damping particles are dispersed in a rubber system, the activity capacity of a rubber molecular chain is enhanced, remarkable internal friction is generated to consume energy and generate hysteresis deformation, and the damping particles are used for an elastic cushion of a track fastener and have excellent damping performance, ageing resistance and load impact fatigue resistance.

The invention belongs to the technical field of vibration-proof hammers, and particularly relates to a self-adjusting vibration-proof hammer and a design method thereof.The self-adjusting vibration-proof hammer comprises a first clamping piece, the first clamping piece is clamped on a wire, and a vibration-proof mechanism is detachably connected to the lower portion of the first clamping piece. The first middle piece is installed below the first hanging piece, first steel strands are installed on the two sides of the first middle piece, first hammer bodies are installed at the ends, away from the first middle piece, of the first steel strands, first cavities are formed in the first hammer bodies, first partition plates are arranged in the first cavities, and first damping shells are placed above the first partition plates. A plurality of second steel strands are installed between the first damping shell and the inner side of the first cavity, particle damping is fully distributed in the first damping shell, damping is generated through friction between particles in the first damping shell, and therefore the vibration reduction effect is achieved, and vibration of the wire is reduced.

The invention discloses a ship pipeline particle damping vibration absorption system and method based on dynamic adjustment. The system comprises a pipeline clamp component and a dynamic vibration absorber. The dynamic vibration absorber comprises a main spring component connected with the pipeline clamp component, a particle damping assembly module connected with the main spring component and a mass balance weight module. The main spring component comprises a center spring and a spring rigidity adjusting module. The particle damping assembly module comprises a fan-shaped metal frame and a plurality of particle damping vibration attenuation units arranged on the fan-shaped metal frame; vibration energy is dissipated through collision and friction of metal particles in the particle damping vibration attenuation unit, the particle diameter and the filling rate are flexibly adjusted according to actual working conditions, and the vibration absorption frequency range is widened. The mass balance weight module comprises a plurality of detachable balance weight pieces which are arranged in a stacked mode. The vibration suppression device is compact in structure and can flexibly adapt to various working conditions, and efficient suppression of vibration at the characteristic frequency position of the pipeline is achieved by dynamically adjusting the spring rigidity, the particle damping parameters and the mass balance weight.

A composite damping device for vibration reduction of a tower drum and blades of an offshore wind turbine belongs to the technical field of vibration reduction of wind driven generators, and is characterized by comprising a blade integration unit and a tower drum tuning unit, the blade integration unit adopts a cylindrical particle damping cavity, the center of the cylinder is connected with a mass ball through a spring, and the cavity is filled with damping particles; the steel wire rope is fixed in the blade to restrain vibration displacement; the tower tube tuning unit is connected with the mass block through a steel wire rope, the mass block is circumferentially provided with the springs and connected with the tower tube wall, the lower portion of the mass block is connected with the mass ball, and the upper periphery and the lower periphery of the mass block are connected with the tower wall through the hydraulic inerter dampers. And the working space is obviously reduced, the multi-direction vibration control capability is improved, and the method is suitable for vibration control of offshore wind turbine towers and blades.

The utility model discloses a vehicle data acquisition box, belonging to the vehicle data acquisition field, the vehicle data acquisition box comprises a box body, a pedestal, vibration damping members, heat radiation fins and a heat radiation fan, a plurality of installation cavities are arranged in the pedestal, the vibration damping members are detachably connected in the installation cavities, a plurality of heat radiation fins are fixed on the side wall of the box body, and the heat radiation fins are fixed on the side wall of the box body. Cooling fans are fixed to the front side and the rear side of the interior of the box body, cooling holes are formed in the front side wall and the rear side wall of the box body, the wind directions of the front cooling fan and the rear cooling fan are the same, and the vibration reduction piece is a rubber block or a particle damping vibration reduction block. According to the vehicle data acquisition box, two different modes are adopted for heat dissipation at the same time, the heat dissipation effect is good, and heat can be discharged more efficiently through the arrangement of the heat dissipation fan through which wind passes. In addition, the detachable vibration reduction pieces are adopted, and the number and the positions of the vibration reduction pieces can be adjusted according to actual use requirements so as to meet the vibration reduction requirements of different vibration environments.

The invention belongs to the technical field of vibration reduction control of high-rise structures such as power transmission towers, and particularly relates to a tuned mass damper with eddy current and particle damping and adjustable frequency damping. Comprising a mass block, a compression spring, a guide rod, a linear bearing, a copper plate, a back plate, a rubber gasket, a first countersunk head screw assembly, a first permanent magnet set, a second countersunk head screw, a cover type nut, a shell cover plate, a shell, a sealing plate, a sealing ring, a steel pipe, a hoop assembly, a hexagon bolt assembly, a silicon steel sheet and a second permanent magnet set. The mass block is a rectangular thick plate, and the compression springs are arranged on the upper and lower surfaces to form an oscillator system. Copper balls and permanent magnets are additionally arranged on the basis of common eddy current damping to form a second damping system, eddy current damping and particle damping are combined, and the vibration reduction effect is better; under the same appearance size, damping and frequency are adjustable, the vibration reduction requirements of steel pipes at different positions of a power transmission tower are met, parts can be machined in batches during production, the damping ratio and frequency can be debugged on site, the vibration reduction requirements of different objects are met, and the project execution time is saved.

The present invention discloses a vibration reduction and isolation system based on a particle damper and a vibration isolator, which is used to improve the vibration isolation effect of a vibration device and a vibration isolation surface, and includes a device body of the vibration device; a particle damper, which is arranged on the device body, and the particle damper is filled with damping particles to convert the low-frequency vibration of the device body into high-frequency particle motion; a vibration isolator, which is arranged between the device body and the vibration isolation surface, and the damping particles inside the particle damper perform high-frequency particle motion, thereby improving the overall vibration frequency of the system composed of the particle damper and the vibration isolator, increasing the upper excitation frequency of the vibration isolator, and effectively improving the vibration isolation effect of the vibration isolator; at the same time, the particle damper can also absorb a part of the vibration energy, further enhancing the vibration reduction and isolation effect. This design has a better effect than using a particle damper alone for vibration reduction and isolation or using a vibration isolator alone for vibration reduction and isolation.

The invention relates to a metal rubber and particle damping mixed rotary vibration isolator which comprises an outer shell, a pair of spring assemblies distributed up and down is arranged in the outer shell in the axial direction, and a metal rubber-particle damping container is arranged between the pair of spring assemblies. A rotating piece capable of stirring the damping particles during rotation is arranged in the metal rubber-particle damping container; a supporting shaft moving up and down in the axial direction is arranged in the outer shell, the supporting shaft penetrates through the pair of spring assemblies and the metal rubber-particle damping container, and the supporting shaft drives the rotating piece to rotate when moving up and down. The spring, the metal rubber and the damping particles are combined, the characteristics of large damping, high elasticity, good thermal stability and adjustable damping of the metal rubber are utilized, energy is dissipated in the vibration isolation process, and the effective inhibition effect on vibration is achieved; and in addition, the collision motion of the damping particles has high energy consumption, damping and adjustable mass, so that the whole vibration isolation system can effectively control low-frequency vibration in a relatively large bandwidth range.

The utility model discloses an embedded continuous support damping device for a track system, which realizes the solution of continuous support of a steel rail and can continuously provide vertical, longitudinal and transverse support stiffness of the steel rail. By configuring particle damping, the problems of Pinned-Pinned resonance of the steel rail, large wheel rail noise radiation, natural vibration of the steel rail and the like in the prior art are solved; the device continuously provides lateral limiting for the steel rail, the stress concentration problem of the fastener and the steel rail is relieved, and the problems that the fastener structure is large in maintenance amount and the like are greatly solved; according to the continuous support, the continuity of the transverse rigidity of the fastener system is guaranteed, the transverse stability of the steel rail is improved and enhanced, and therefore the defect that the transverse stability of the fastener system is poor is effectively overcome.

The invention provides a rail vehicle front end energy absorption protection system, which belongs to the technical field of rail vehicles, and is characterized in that various modules are integrated at the front end of a rail vehicle, a multi-source sensing module is started, and information such as front obstacles, vehicle vibration and rail magnetic field signals is collected; the intelligent control module performs cross validation on the multi-source signal, calculates a collision probability and estimated collision time, and outputs a corresponding collision level; during low-load collision, the bionic energy absorption unit is unlocked; during medium load collision, the electromagnetic hydraulic buffer and the particle damping module are started; during high-load collision, the anti-climbing device and the shape memory alloy restraint layer are overlapped and started; the energy recovery module converts hydraulic energy into mechanical energy. According to the front-end energy absorption protection system for the railway vehicle, different load requirements are met through graded energy absorption, the high-risk protection effect is enhanced through auxiliary protection, economical efficiency and practicability are improved through energy recovery and automatic reset, and the reliability of collision protection is remarkably improved.

The invention discloses a superstructure shell device for reducing noise radiation, which comprises an outer shell and an inner shell, and is characterized in that the outer shell and the inner shell are of a thin shell structure which is coaxially arranged; and one or more annular noise reduction devices, wherein the annular noise reduction devices are arranged between the outer layer shell and the inner layer shell. The connecting device is used for coaxially and fixedly connecting the outer-layer shell, the annular noise reduction device and the inner-layer shell; wherein each annular noise reduction device comprises an integrated circular ring frame and at least one closed particle damping cavity, the circular ring frame comprises a plurality of torsion structure cavities and connecting rods in the annular direction, the torsion structure cavities and the connecting rods are periodically arranged in the annular direction, and the torsion structure cavities and the connecting rods form periodic structure units in a plane; the particle damping cavity is defined by a cover plate and the torsion structure cavity, and the particle damping cavity is filled with spherical particles.

The invention relates to the technical field of material mechanical property detection equipment, in particular to a marine stainless steel pipeline system pressure-bearing connecting piece tensile testing machine which comprises a base, a frame, a lower chuck, a cross beam, an upper chuck and an intelligent sensor and further comprises a hydraulic buffering assembly, a built-in groove, spherical particles, a gathering and dispersing assembly, a transmission assembly and a particle damping assembly. Through the cooperative cooperation of the hydraulic buffer assembly, the built-in groove, the spherical particles, the gathering and dispersing assembly, the transmission assembly and the particle damping assembly, the problems that in the prior art, when a high-strength pressure-bearing connecting piece tensile test is carried out, due to fracture impact, energy accumulation of an upper chuck and a cross beam and hidden welding line fatigue crack propagation of a frame are caused; the device has the advantages that the upper chuck is effectively buffered, the influence of fracture impact on the device is reduced, the service life of the device is prolonged, and the detection precision of the device is improved.

The invention involves a triangular prismatic tuned mass damper suitable for large-span or cantilever structures, including a triangular prism box, particle damping units inside the triangular prism box, and a steel mass block. Below the triangular prism box are high-damping springs. The particle damping unit consists of a particle damping cavity, particles of three different sizes, and foam rubber pads. When the structural vibration amplitude is small, the particles dissipate energy by compressing the foam rubber pads and rolling. When the amplitude of structural vibration is large, the energy is dissipated by the collision of particles and the compression of the foam rubber.

The invention discloses a vibration damper based on particle damping and metal rubber mixing, and relates to the field of vibration absorbers. An existing shock absorber is limited in shock absorption effect and cannot be used in a more complex environment. The device comprises an elastic plate and a vibration cavity filled with metal rubber and damping particles, an insertion opening is formed in the side wall of the vibration cavity, the elastic plate is partially inserted into the vibration cavity from the insertion opening of the vibration cavity and is supported by the insertion opening of the vibration cavity, and the length, located in the vibration cavity, of the elastic plate is larger than the length, located outside the vibration cavity, of the elastic plate. When the end, located outside the vibration cavity, of the elastic plate is subjected to vibration force and swings up and down, the end, located in the vibration cavity, of the elastic plate swings reversely, and the metal rubber and the damping particles are stirred, so that the vibration amplitude of the metal rubber and the damping particles is increased. The vibration absorber is mainly used for absorbing vibration.

The present invention discloses a non-local particle damping rotating superstructure wide low-frequency vibration reduction device, comprising a mechanical superstructure and an external cavity; the mechanical superstructure is composed of a plurality of unit cell structures periodically arranged in an XY plane, and the unit cell structure is composed of a non-local connection structure, a matrix damping structure, a connection damping structure and a rod; the matrix damping structure is composed of a particle damping group, a baffle, a partition and a matrix damping cavity; the connection damping structure is composed of a particle damping group, a baffle, a partition and a connection damping cavity; the non-local connection structure is composed of a particle damping group, a partition, a baffle and a non-local cavity; a plurality of layers of particle damping groups are arranged in the matrix damping cavity, the connection damping cavity and the non-local cavity, partitions are provided between each layer of particle damping groups, and baffles are detachably installed in each cavity; the external cavity and the mechanical superstructure are connected to each other by a rotating connection rod, and the bottom of the non-local connection structure in the mechanical superstructure is in a suspended state.

The present invention discloses a damping rubber composition for rail fasteners and its preparation method. The damping rubber composition is characterized by comprising the following raw materials, measured by weight: 100 parts of composite rubber, 25-35 parts of damping particles, 15-20 parts of sheet structure filler, 5-10 parts of plasticizer, 5-10 parts of tackifier, 3-5 parts of high-temperature resistant fiber, 2-4 parts of vulcanizer, 3-5 parts of activator, 2-2.5 parts of accelerator, and 1-3 parts of antioxidant. The composite rubber is a composite of EPDM rubber, natural rubber, and nitrile rubber. The damping particles are elastic particles obtained by filling aerogel nanopores with asphalt and a glycidyl methacrylate-modified elastomer. The damping particles are dispersed in the rubber system, enhancing the mobility of the rubber molecular chains, generating significant internal friction to dissipate energy and induce hysteretic deformation. The elastic pad used in rail fasteners exhibits excellent damping performance, aging resistance, and load impact fatigue resistance.

The utility model discloses a sectional material vibration attenuation structure based on particle damping and a rail train, the sectional material vibration attenuation structure comprises a chassis sectional material of a train body, a plurality of particle dampers are arranged on the upper surface and / or the lower surface of the chassis sectional material, each particle damper comprises a shell and damping particles filled in the shell, and the damping particles are arranged on the upper surface and / or the lower surface of the chassis sectional material. Acoustic radiation energy and / or vibration energy is consumed by the impact and friction between the damping particles. According to the utility model, the full-band vibration magnitude can be effectively reduced, the full-band sound insulation index is improved, the comfort level of passengers in the vehicle is improved, the influence of temperature is avoided, the original structure of the vehicle body is not changed, and the installation is convenient.

The invention discloses a vibration reduction base based on rigid supporting and frequency-division-band cooperative energy consumption and application thereof, and belongs to the technical field of vibration reduction and isolation of ship equipment. The vibration reduction base comprises a main body supporting structure, an energy consumption unit and a local resonance unit; the main body supporting structure is composed of an upper panel, a lower panel and an orthogonal rib plate support, the upper panel and the lower panel are parallel to each other, the orthogonal rib plate support is arranged between the upper panel and the lower panel, a cylindrical container is arranged in the center of the orthogonal rib plate, the orthogonal rib plate and the cylindrical container are integrally formed, and the central axis of the cylindrical container coincides with the crossed axis of the orthogonal rib plate; the energy consumption unit is positioned in the upper panel and the cylindrical container; the local resonance units are located in four independent spaces formed by the orthogonal rib plates; and the upper panel is connected with the lower panel. Low-frequency vibration energy is focused and blocked through the local resonance unit, meanwhile, the low-frequency focusing energy and medium-high frequency vibration energy are subjected to broadband energy efficient dissipation through the multi-stage particle damping system, and broadband cooperative efficient vibration reduction is achieved.

The invention discloses a railway depot stand column damper adopting a particle damping technology and a design method, and relates to the technical field of vibration control, the railway depot stand column damper comprises a damper body arranged on a stand column, the damper body is fixed to the stand column through bolts, the damper body comprises a fixing support and a steel groove formed in the fixing support, and a sealing steel plate is arranged above the steel groove; a damping liquid filling opening is formed in the sealing steel plate, damping liquid is arranged in the steel tank, and a plurality of granular steel balls are arranged in the damping liquid; a damper design method is adopted, parameters are optimized according to actual measurement results, the damping ratio of a structural vibration transmission key path is increased, it is ensured that the damper achieves the optimal performance in a specific application scene, design accuracy and reliability are improved, cost and risks are reduced, and technical innovation is promoted.

The present application relates to a kind of satellite flywheel composite vibration isolator, including particle damping device, active vibration isolation device and control system, the particle damping device includes first vibration reduction spring, damping cavity, second vibration reduction spring, particle group;The active vibration isolation device includes connecting rod, piezoelectric sensor, piezoelectric actuator.Particle damping device is suitable for passive vibration isolation of space vibration isolator by special structure design, and the damping band is wider by friction energy dissipation and spring two-stage vibration reduction;Active vibration isolation device realizes low-frequency vibration isolation.The oblique arrangement of damping cavity and connecting rod can realize 6 degrees of freedom vibration isolation.The present application combines a variety of vibration isolation methods, and the vibration isolation effect is better with light mass, simple structure and convenient assembly.

A vibration damping component for a vehicle includes a housing, and a mounting lug attached to the housing. The mounting lug includes an outer shell with a top, a bottom, and sides. The mounting lug also includes a bore through the outer shell from the top to the bottom. The mounting lug also includes a cavity, an interior lattice, and a damping media. The outer shell and the bore enclose the cavity. The interior lattice is within the cavity and stiffens the mounting lug. The damping media is enclosed in the cavity and between solid portions of the interior lattice.

The invention belongs to the technical field of wind power generation equipment structures, and particularly relates to a double-layer vibration reduction tower tube structure of a wind turbine generator. Comprising an outer-layer tower drum and an inner-layer tower drum, and a composite particle damping material is filled between the outer-layer tower drum and the inner-layer tower drum; and two ends of the outer-layer tower drum and the inner-layer tower drum are fixedly sealed. The composite damping structure adopted by the invention can effectively cover a broadband vibration domain from 0.5 Hz to 20 Hz. Compared with a traditional pure metal friction damping structure, the low-frequency vibration attenuation rate is increased by about 45%; compared with a single particle filling damping structure, the high-frequency vibration response speed is increased by about 60%.

The utility model discloses a particle damping shock absorber production feeding table with an anti-interference structure, which comprises a working table, a rubber shell, a rotary table and a feeding table body, the rotary table and the feeding table body are respectively arranged on the working table, and jigs distributed at equal intervals are arranged on the outer wall of the top of the rotary table. The grabbing mechanism is used for grabbing the rubber shell; the clamping mechanism is used for clamping the rubber shell; a fixing table is arranged on the outer wall of the top, close to the feeding table body, of the workbench, a first electric telescopic rod is arranged on the outer wall of one side of the fixing table, a mounting block is arranged at the piston end of the first electric telescopic rod, a first air cylinder is arranged on the outer wall of the top of the mounting block, and a connecting frame is arranged at the piston end of the first air cylinder; and two limiting needles are arranged on the outer wall of the bottom of the connecting frame. The feeding table with the anti-interference structure for particle damping shock absorber production has the technical effects that the anti-interference effect is good, taking is more convenient, and automatic grabbing and mutual matching are achieved.

The present application provides a multi-objective autonomous traction method for a surgical robot based on fuzzy logic, which relates to the field of medical device technology. The method includes: assembling an actuator at the end of the robot, simplifying the end motion of the actuator into a spring-mass damped linear control system, and constructing multiple target controllers; respectively calculating the predicted evaluation gradient descent value for each control target and constructing a state feedback mechanism; weighted fusion of the multi-objective control quantities based on a preset state feedback fusion mechanism, and inputting the weighted fused target values ​​into the spring-mass damped linear control system. Aiming at the complexity of the surgical scene, the present application integrates various safety constraints in the operation into the autonomous motion planning of the robot in the form of control targets through a multi-objective constraint control strategy; by pre-defining the traction point, the robot automatically and safely performs tissue traction without requiring any prior knowledge of the surgical scene or tissue model.

This invention belongs to the field of wind tunnel structural design and discloses a wind tunnel modulating plate structure based on combined damping technology. The structure includes a test section, modulating plate assemblies, connecting rods, constrained damping units, particle damping units, sidewalls, and a dynamic seal. The wind tunnel modulating plate structure comprises a transonic second throat or supersonic diffusion section formed by two symmetrically arranged modulating plate assemblies located behind the test section and two symmetrically arranged sidewalls. The modulating plate assembly includes three modulating plates hinged sequentially and constrained damping units fixed to the leeward side of each modulating plate. The middle modulating plate is connected to an external drive mechanism via a connecting rod mounted on the leeward side. When the modulating plate vibrates, the damping particles in the particle damping unit collide and rub against each other, while the damping layer of the constrained damping unit undergoes periodic shear deformation, thereby efficiently dissipating vibration energy. The wind tunnel modulating plate structure exhibits excellent vibration reduction performance, strong environmental adaptability, small added mass, and flexible layout, improving the reliability and safety of wind tunnel operation.

The utility model discloses a particle damping type fastener elastic strip which comprises an elastic strip body, a plurality of cavities are formed in the elastic strip body, a plurality of first particles and second particles are filled in the cavities, and the particle size of the first particles is larger than that of the second particles. In any cavity, the total filling rate of the first particles and the second particles is 60%-80%. The utility model aims to provide the particle damping type fastener elastic strip, so as to solve the problems of damage and safety caused by resonance of the elastic strip in the prior art, and achieve the purposes of improving the self-damping of the elastic strip, reducing the damage of the elastic strip caused by resonance and improving the running safety of a high-speed train.