46 results about "Particle damping" patented technology

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 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 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%.

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.

The invention relates to a dynamic vibration absorber based on acoustic black hole and particle damping coupling, which comprises an acoustic black hole structure and a cavity shell, the acoustic black hole structure comprises a thickness gradual change area and a uniform thickness area, and the thickness of the thickness gradual change area is gradually reduced from the maximum thickness end to the minimum thickness end; the minimum thickness end of the uniform thickness area and the minimum thickness end of the thickness gradual change area are connected into a whole, and a damping covering layer is arranged at the joint of the thickness gradual change area and the uniform thickness area. The cavity shell covers the acoustic black hole structure, a cavity is formed in the cavity shell, partition plates are arranged in the cavity at intervals, the adjacent partition plates divide the cavity into sub-cavities which are not communicated with one another, the sub-cavities are filled with free particles, and the height of the partition plates in the cavity is matched with the outer contour of the acoustic black hole structure in a coordinated mode. The gap between the top of each partition plate and the acoustic black hole structure is smaller than the diameter of a free particle. By means of the synergistic effect of acoustic black hole energy gathering and particle damping energy dissipation, the overall vibration reduction efficiency is improved, and the effective frequency band is widened.

This invention discloses a combined particle-damped underwater superstructure hull noise suppression device, comprising an outer hull, an inner hull, and a superstructure connector; the inner hull and the outer hull are coaxially arranged and form a circumferential gap; several hull connecting blocks are arranged along the inner surface of the outer hull and the outer surface of the inner hull; the superstructure connector is arranged within the circumferential gap and periodically along the axial direction of the hull, and the superstructure connector is composed of several superstructure unit cells connected sequentially along the axial direction; the superstructure unit cell is a combined cubic structural unit, including a skeleton, a mass block, and a particle damping group; the skeleton is a hollow structure, forming a cavity inside; the skeleton is provided with connecting rods and connecting blocks to realize the fixed connection between adjacent superstructure unit cells and between the superstructure unit cells and the hull connecting blocks; the mass block is detachably connected to the skeleton; the particle damping group fills the cavity inside the skeleton.

The invention discloses an adjustable-frequency steel rail vibration absorption structure, device and method based on the particle damping technology, and the adjustable-frequency steel rail vibration absorption structure based on the particle damping technology comprises a fastening piece which is fixed to a steel rail through a fixing piece, and the fastening piece is provided with a vibration absorption face making contact with the steel rail; the two foundation mass blocks are symmetrically arranged on the two sides of the fastening piece through cantilever pieces; and the two damping bins are arranged at the ends, away from the fasteners, of the basic mass blocks correspondingly, storage spaces are formed in the damping bins, and the storage spaces are used for containing vibration absorption particles. The inherent frequency of the steel rail vibration absorption device is adjusted by accurately regulating and controlling the mass, rigidity and damping parameters of the vibration absorption structure and adjusting the type and filling rate of particles in the cylinder, effective energy dissipation is carried out on steel rail vibration of a corresponding frequency band generated by interaction between wheel rails, and the effects of restraining steel rail corrugation and reducing wheel rail noise are achieved.

This invention provides an active vibration suppression and damping device and method for a projectile model with a large aspect ratio. The device includes an angle-of-attack mechanism, a vibration-damping support rod, and a balance. It also includes an active vibration suppression module and one or more honeycomb particle damping modules installed on the projectile's head. The active vibration suppression module includes a tail-end vibration suppression connector connecting the angle-of-attack mechanism and the vibration-damping support rod, multiple piezoelectric ceramic promoters installed on the tail-end vibration suppression connector, a piezoelectric fiber MFC installed on the projectile body, and a vibration monitoring component. The honeycomb particle damping module includes honeycomb cavities, each cell of which is filled with high-density particles. Shear-thickening material is filled in the gaps between the honeycomb cavities and the high-density particles. Interconnected flow holes are provided between adjacent cells to allow the shear-thickening material to flow between different cells. This embodiment, through the honeycomb particle damping module and the active vibration suppression module, achieves vibration suppression of multi-mode vibrations in the projectile model, improving the accuracy of model load measurement.

The invention discloses a vibration attenuation coupling based on particle damping, which comprises a coupling body, the coupling body is provided with an axis, a first connecting end and a second connecting end are respectively formed at two ends of the coupling body along the axis, the first connecting end is used for connecting an external first shaft structure, and the second connecting end is used for connecting an external second shaft structure; the coupling comprises a coupling body and a plurality of first vibration reduction units, the coupling body is periodically provided with a plurality of first installation spaces along the axis, each first vibration reduction unit is installed in the corresponding first installation space, and each first vibration reduction unit comprises a plurality of first particle dampers. Through the application of the coupling structure with the broadband vibration reduction performance based on particle damping, the first vibration reduction units are periodically arranged on the coupling body in the axis direction, and the second vibration reduction units are arranged in the coupling body; therefore, efficient suppression of three-dimensional vibration in the axial direction, the radial direction and the torsion direction is achieved, and broadband impact excitation is effectively relieved.

The invention discloses a design and simulation method of an aero-engine external pipeline clamp support for resisting vibration-impact combined load, and relates to vibration and impact protection of aero-engines and external pipelines. A composite vibration isolation unit composed of metal rubber and annular cavity particle damping is introduced into the connecting position of a traditional clamp and a cartridge receiver, and a mass block-metal rubber-particle damping parallel supporting structure is constructed. Establishing an external pipeline finite element model, and obtaining an engine vibration load and an impact acceleration time history similar to carrier-based aircraft landing; the equivalent stiffness and nonlinear particle damping parameters of the composite vibration isolation unit are identified, and a mass-spring-nonlinear damping kinetic model is established; and a composite vibration isolation unit is equivalent to a nonlinear spring-damping element to be coupled into the pipeline-hoop-casing finite element model, and response analysis and parameter optimization design under the vibration-impact combined working condition are carried out. The peak acceleration and the bending stress of an external pipeline are reduced, and the accuracy and the engineering efficiency of anti-vibration and anti-impact design are improved.

This invention relates to a triangular prism-type tuned mass damper suitable for large-span cantilever structures, comprising a triangular prism box (1), a particle damping unit (4) disposed within the triangular prism box (1), and a steel mass block (3). A high-damping spring (2) is located below the triangular prism box (1). The particle damping unit (4) includes a particle damping chamber (5), three different sized particle balls, and a foamed rubber pad (9). When the structural vibration amplitude is small, the particle balls dissipate energy by compressing the foamed rubber pad and rolling; when the structural vibration amplitude is large, the particle balls dissipate energy by colliding and compressing the foamed rubber. Compared with the prior art, this invention achieves a phased energy dissipation mechanism while solving the problems of narrow vibration reduction bandwidth, large motion stroke, and noise generated by particle collisions in traditional mass tuned dampers.

The invention relates to the technical field of physical training instruments, in particular to a strength training device and method, and the device comprises a bottom plate, a main frame, two supporting cross rods and two training units. Each training unit comprises a guide supporting frame, a plurality of damping generators, a collector and a cable lifting assembly. The damping generator is arranged on the guide supporting frame in a sliding mode and comprises a magnetic-sensing metal rubber damping unit and a particle damping unit. The collector adopts a distribution steel pipe and a quick-plug connector assembly, and quick adjustment of sub-cable connecting points is achieved. The height of the supporting cross rod is adjusted and locked through the height adjusting ejector rod and the locking piece. A training force line is changed by adjusting the position of the damping generator, differentiated configuration of left and right arm loads is achieved by adjusting the connecting point of the collector, and the problems that the position of a resistance source of a traditional instrument is fixed and differentiated adjustment of the left and right arm loads cannot be achieved are solved.

The invention belongs to the field of dynamic compaction damping rammers, and provides a dynamic compaction damping rammer based on particle damping and a parameter configuration method of the dynamic compaction damping rammer. The dynamic compaction damping rammer based on particle damping comprises a rammer detacher, a rammer damping cavity, a top-layer balance weight, a middle balance weight and a bottom-layer balance weight. The top-layer balance weight, the middle balance weight and the bottom-layer balance weight are assembled into a balance weight structure through bolts; the rammer damping cavity is arranged in the counterweight structure; a particle damping material is contained in the rammer damping cavity; the rammer detacher is connected to the center point of the upper surface of the top-layer balance weight and used for being connected with hoisting equipment and automatically unhooking after the rammer detacher reaches the preset height. The energy dissipation of tamping energy can be greatly reduced, the efficiency of the tamping energy is improved, and the quality control of a dynamic compaction treatment foundation is enhanced.

The invention relates to a particle flexible hinge composite vibration isolation device for bearing an optical load, and belongs to the technical field of optical load vibration isolation, the device comprises a base plate, an optical load connecting assembly and a particle flexible hinge composite supporting leg assembly, in the particle flexible hinge composite supporting leg assembly, a bottom connecting part of a Z-shaped damper is fixedly connected with the base plate, and a bottom connecting part of the Z-shaped damper is fixedly connected with the optical load connecting assembly; the particle damper is fixedly installed on the upper surface of the top installation portion of the Z-shaped damper, the particle flexible hinge supporting leg is provided with a connecting platform and a pair of flexible hinge supporting legs extending downwards from the connecting platform, the connecting platform is fixedly connected with the lower surface of the top installation portion of the Z-shaped damper, open grooves are formed in the two flexible hinge supporting legs, and the open grooves are communicated with the particle flexible hinge supporting leg. And at least one slot is filled with damping particles and is sealed by a supporting leg cover plate. According to the invention, vibration and impact can be effectively suppressed in a full frequency domain, force thermal deformation can be self-adapted, the structure is compact, the rigidity is high, and optical loading force thermal coupling input is effectively reduced.

This application relates to the field of vibration control in civil engineering, and provides a multi-directional vibration reduction device and method for pipelines based on particle damping. The device includes: an annular component installed on the outside of the pipeline; multiple particle dampers spaced circumferentially along the annular component; each particle damper includes a container and particles filled within the container; multiple translational guide devices spaced circumferentially along the annular component; devices for guiding the particle dampers to translate radially along the annular component; and an energy-dissipating spring connected between the annular component and the container of the particle damper. This invention guides the particle dampers to translate radially along the annular component using translational guide devices, and achieves multi-directional vibration reduction for the pipeline through energy dissipation via frictional collisions of the particles in the dampers and energy dissipation through deformation of the energy-dissipating spring. It is applicable not only to transverse pipelines but also to vertical pipelines.

The application discloses a flexible constraint particle damping vibration isolation hammer, which comprises a wire clamp, a steel strand, two hammer heads and multiple partitions, the middle part of the steel strand is connected with the wire clamp, the two hammer heads are arranged at the two ends of the steel strand respectively, the hammer head is a hollow pipe body structure, the two ends of the hammer head are respectively provided with a hammer head end cover, the end part of the steel strand is connected with the hammer head end cover away from the wire clamp after penetrating through the inside of the hammer head, the multiple partitions are vertically fixed on the inner wall of the hammer head and are arranged around the hammer head, a sector cavity is divided between the adjacent two partitions and the inner wall of the hammer head, a group of flexible particle damping units are arranged in each sector cavity, and each group of the flexible particle damping units comprises multiple particles covered by a first flexible constraint material. The flexible constraint particle damping vibration isolation hammer replaces viscous damping with maximum friction damping, realizes low-frequency vibration suppression of the particle vibration isolation hammer on the power transmission line, does not need to be replaced and maintained regularly, and has the advantages of no grease and no pollution.

This application provides a high-efficiency vibration isolation barrier system for external buildings, installed at a certain distance outside the building structure / body. It mainly includes spaced-out circular steel pipe pile supports along the vibration isolation groove, S-shaped micro-curved stainless steel plate energy dissipation units with controllable pretension, sand-composite particle damping fillers, and vertical sliding inertial counterweights. The vibration isolation mechanism is clear, and the vibration isolation capacity in both the horizontal and vertical directions can be reliably calculated. Each component has a clear mechanical model, and the overall performance can be quantitatively predicted. Through the synergy of multiple mechanisms, the system aims to achieve a comprehensive insertion loss of >15dB, far exceeding existing passive barriers.

The embodiment of the invention relates to the field of vibration and noise reduction of passenger cars, and discloses a particle damping parameter calibration method and device, electronic equipment and a storage medium. The method comprises the following steps: constructing a particle damping simulation model based on a discrete element method; verifying whether an output result of the particle damping simulation model is credible at least based on the first damping particle; constructing a damping training data set based on the particle damping simulation model and the second damping particles; constructing and setting a BP neural network; training a BP neural network based on the damping training data set to at least determine whether an output result of the BP neural network is credible; and after the output result of the BP neural network is credible, the state parameters of the third damping particles are calibrated based on the BP neural network and the repose angle test system. According to the method, the damping particle performance parameters are quickly and accurately predicted at least by constructing the BP neural network, and the driving experience of a user is guaranteed.

This invention provides a vibration-damping cutterhead for hard rock tunneling based on particle damping and its damping design method. The hard rock tunneling vibration-damping cutterhead includes a cutter box plate with a cavity, and a plurality of roller cutters are arranged inside the cutter box plate; the cavity of the cutter box plate is filled with metal particles of different sizes. This invention reconfigures and rationally utilizes the space formed inside the cutter box plate for particle damping design and filling, which can effectively reduce the propagation of vibration on the main structure of the cutterhead, thereby reducing the overall vibration generated by the cutterhead of the hard rock tunneling equipment during rock breaking.

This utility model relates to the field of engineering vibration reduction technology, specifically a full-frequency vibration damping control device based on metamaterial particle vibration reduction and noise reduction. It includes several symmetrically distributed dynamic vibration absorption modules, each consisting of a mass unit and elastic bodies covering the mass unit, forming a linear vibration absorption unit that absorbs low frequencies. The particle damping module is filled with discrete particles of different sizes. The dynamic vibration absorption module and the particle damping module are integrated and stacked within a main housing. This utility model overcomes the deficiency of insufficient low-frequency excitation in traditional particle dampers by using the dynamic vibration absorption module to target and absorb vibration energy in the target low-frequency range through the anti-resonance principle of the mass-elastic body. In the high-frequency range, the particle damping module takes the lead. The integrated and collaborative operation of the dynamic vibration absorption module and the particle damping module achieves a seamless full-frequency vibration suppression effect from low to high frequencies.

The invention provides a method and device for determining the setting position of a particle damper. The method comprises the steps that a target area on a damping plate is divided into a plurality of small areas; a plurality of particle dampers are arranged in the small areas correspondingly, and initial arrangement positions are formed; and optimizing the initial arrangement position by using a grey wolf algorithm, and determining the final arrangement position of the particle damper. The multiple areas are arranged on the inner surface of the vibration reduction steel plate, the arrangement position of the particle damper is optimized through the grey wolf algorithm, and the technical effect that the particle damper can effectively suppress the vibration peak value in the multi-order mode is achieved. The particle damper shell is filled with the damping particles and fixed to the vibration reduction steel plate in a bonding mode, and the technical effects that the structure is simple, installation is convenient and fast, and good durability is achieved are achieved.

This invention discloses a mechanical metamaterial vibration isolation device with synergistic effects of local resonance and particle damping, comprising a dual-oscillator periodic phonon crystal, a flexible connecting device, a self-lubricating panel, and a protective shell. The dual-oscillator periodic phonon crystal includes a large hexagonal grid, a small hexagonal grid, a helical spring assembly, and a group of loose particles. The flexible connecting device includes a porous connecting plate, a force-equalizing beam, and a series of disc springs. The large hexagonal grids are bolted together. The small hexagonal grids, as ordinary local oscillators, are placed inside the large hexagonal grids and connected to the large hexagonal grids via the helical spring assembly. The group of loose particles is spaced apart along the long side of the vibration isolation device within the small hexagonal grids, forming a particle-damped local oscillator with the small hexagonal grids. The large hexagonal grids containing the two types of local oscillators are periodically arranged to form the dual-oscillator periodic phonon crystal. The phonon crystal is connected to the outside via the flexible connecting device. The self-lubricating panel contacts the upper and lower surfaces of the phonon crystal and is embedded in the protective shell.

The invention discloses a cooperative vibration reduction coupling which comprises a coupling body and a vibration reduction module, an inner cavity is formed in the coupling body, and the vibration reduction module is arranged in the inner cavity; wherein the vibration reduction module comprises an acoustic black hole assembly, a particle damping assembly and a center supporting assembly, the center supporting assembly is arranged in the center of the inner cavity, the particle damping assembly is arranged on the periphery of the center supporting assembly, and the acoustic black hole assembly is arranged on the periphery of the particle damping assembly. Through the application of the coupling, the acoustic black hole and particle damping cooperative vibration reduction is provided, the coupling is particularly suitable for achieving wide-frequency-domain and multi-dimensional vibration suppression, and propagation of torsional vibration can be effectively suppressed; the cooperative vibration reduction coupling is simple in structure, convenient to assemble, low in production cost and low in maintenance requirement.

The invention provides a harmonic reducer and a robot, and relates to the technical field of harmonic transmission. The harmonic reducer comprises a rigid gear, a flexible gear and a wave generator; the rigid gear is sleeved with the flexible gear, and outer teeth of the flexible gear are meshed with inner teeth of the rigid gear. The flexible gear is sleeved with the wave generator; a damping particle cavity is formed between the outer circumferential wall and the inner circumferential wall of the rigid wheel and filled with metal particles. Wherein the flexible gear is the fixed end of the harmonic reducer, the wave generator is the input end of the harmonic reducer, the rigid gear is the output end of the harmonic reducer, and the rotation of the rigid gear can enable metal particles to collide and rub to generate low-order damping and enable the metal particles to collide and rub with the rigid gear to generate high-order damping. According to the arrangement, the metal particles and the rigid wheel are jointly combined into the particle damping shock absorber, the integrated design of the particle damping shock absorber and the rigid wheel is achieved, generated low-order damping and high-order damping are used for absorbing vibration energy, and the problem of how to effectively suppress resonance of a harmonic reducer in the prior art is solved.

This invention relates to the field of materials testing technology, specifically disclosing a drop hammer impact device and testing method based on particle damping anti-rebound and energy control. The method includes: placing the test piece at the bottom of an impact guide cylinder; then activating a rotary motor to drive the driving pulley, driven pulley, synchronous belt, and ball screw to rotate synchronously, causing the slider carrying the lifting block and chuck to descend along a slide rod. When the chuck contacts the conical head of the anti-rebound hammer, the chuck's hook automatically opens and grips the conical head. Then, the rotary motor is switched to reverse, causing the slider to rise along the slide rod and ball screw, thereby using the chuck to hook and lift the anti-rebound hammer. When the upper part of the chuck touches the limit pin, the chuck's hook opens outward to release the anti-rebound hammer, and the slider stops moving. After the anti-rebound hammer descends, it impacts the test piece. This invention achieves lossless adaptive anti-rebound, ensures absolutely stable heavy-load lifting, and has a quick hammer replacement function.

Device (10) with (a) a vibrating component (20) and (b) a particle damper (30) comprising a base body (32) with a cavity (34) which is at least partially filled with particles (52), (c) wherein the particle damper (30) comprises an acoustic black hole element, ASL element, (40), (i) comprising at least one ASL section (42) in which the thickness of the ASL element (40) in a plane of vibration decreases substantially according to a power function or substantially according to an exponential function from an inlet end (44) of the ASL section (42) to a tapered end (46) of the ASL section (42) in a plane of vibration from an inlet end (44) of the ASL section (42) (ii) wherein the ASL section (42) interacts with the particles (52), (iii) wherein at least part of the ASL element (40) forms at least part of the boundary of the cavity (34) of the particle damper (30) and / or extends at least partially into the cavity (34) of the particle damper (30).