78 results about "Particle damping" patented technology

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 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 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 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 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.

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.

The invention provides a thermal-insulation damping shock-absorption noise-reduction composite material as well as a preparation method and application thereof, and belongs to the technical field of building functional materials. The composite material comprises the following components in parts by weight: 30-40 parts of a cementing material, 8-13 parts of a particle damping component, 13-20 parts of a heat-insulating lightweight aggregate, 7-12 parts of a damping modified component, 3-5 parts of reinforced fibers, 10-15 parts of a mineral admixture, 1.2-2.4 parts of an auxiliary agent and 12-15 parts of water. Through innovation of the particle damping principle, breakthrough improvement of the vibration sound insulation performance of the cement-based material is achieved, a high-performance core material is provided for a sandwich sound insulation and heat preservation plate, and the technical innovation and the application value are remarkable.

The invention provides a multi-particle-size particle damping device based on double cavities and electromagnetic regulation and control. The multi-particle-size particle damping device comprises a damping shell; the damping shell is divided into a first chamber and a second chamber which are independent from each other through an insulating partition plate, and particles with different particle sizes are arranged in the first chamber and the second chamber respectively; an electromagnet is arranged at the end part of each cavity, and an electromagnet coil is wound on the periphery of each electromagnet; a current coil is arranged on the outer side of each cavity in a surrounding mode. According to the device, the two independent cavities are arranged to contain ferromagnetic particles with different particle sizes respectively, intelligent release and excitation of the particles are achieved through electromagnetic control, and therefore self-adaption and low-energy-consumption suppression of broadband vibration is achieved, the vibration reduction efficiency and reliability are remarkably improved, and the application range of the device is widened. Through the device, the problems of narrow vibration reduction frequency band, incapability of adapting to frequency change, high energy consumption and the like in the prior art are solved.

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.

The invention provides an annular liquid tuning particle damping shock absorption device for an electric power climbing pole, belongs to the technical field of electric power infrastructures, and solves the technical problems that the existing frequency application range is narrow, and a single damping mechanism is difficult to cover the broadband vibration characteristic of the electric power climbing pole. An annular liquid tuning particle damping shock absorption device for an electric climbing rod comprises a climbing rod body, a shock absorption cavity formed in the bottom of the climbing rod body and guide sliding grooves annularly formed in the cavity wall of the shock absorption cavity, a supporting plate is slidably connected to the interior of each guide sliding groove, and a supporting seat is fixed to the bottom end of each supporting plate; and each supporting seat is fixed to the ground through bolts or in a welding mode, a hydraulic stabilizer bar is vertically fixed to the center of the cavity bottom of the damping cavity, and a plurality of first mounting seats are arranged and fixed to an output rod of the hydraulic stabilizer bar. The broadband vibration damper has the advantages that broadband vibration control is achieved through the synergistic effect of solid particle collision energy dissipation and liquid viscosity tuning, and the damping effect is improved.

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 multi-layer labyrinth type elastic wave particle damping metamaterial vibration isolation device which comprises a protective shell, a self-lubricating plate, a vibration bearing limiting device and an internal vibration reduction device. The protective shell comprises an upper cover plate, an outer frame and a lower cover plate; the self-lubricating plate is fixed on the lower cover plate through a bolt; the four vibration bearing limiting protection devices are arranged on the four faces of the outer frame and comprise vibration bearing plates, double-end studs, self-lubricating shaft sleeves, vibration transmission compression springs and vibration transmission limiting plates. The internal damping device is arranged in the protective shell, the periphery of the internal damping device is attached to the vibration transmission limiting device, the upper surface of the internal damping device makes contact with the upper cover plate, the lower surface of the internal damping device makes contact with the self-lubricating plate, and the internal damping device comprises a vibration uniformizing plate, a pushing block, a limiting shell, a self-lubricating baffle and a periodic labyrinth set. The periodic labyrinth group comprises a labyrinth block, a spherical particle damper and a covering block; the labyrinth blocks are in six different forms, are stacked into a unit according to a fixed sequence and are periodically arranged in the limiting shell, at least two layers of spherical particle dampers are arranged, and the labyrinth structure is tightly filled with the spherical particle dampers and the covering blocks.

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 provides an impact reduction device combining mixed particle damping and a lattice structure and a design method. The impact reduction device is composed of a plurality of dot matrix matrixes, the dot matrix matrixes jointly form a dot matrix structure, each dot matrix matrix comprises a plurality of basic cell elements with cavities, a plurality of connecting plates are fixed to the side wall of each basic cell element, and the adjacent basic cell elements are fixedly connected through the connecting plates. And the cavity of each basic cell element is filled with a particle damper formed by mixing flexible low-mass particles and rigid high-mass particles. Compared with a traditional single metal particle scheme, the particle damping mixed particle scheme in which the flexible low-mass particles and the rigid high-mass particles are mixed is adopted, the weight is reduced by 33%, meanwhile, the impact reduction effect is almost not affected, and therefore the device is more suitable for aerospace scenes. The particle damping design simulation route provided by the invention can be applied to the design of most particle dampers, and the design cost is reduced.

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 application provides a kind of underground gas storage injection-production string composite variable-damping semi-active damper system, the semi-active damper system includes casing string, magneto-rheological fluid and particle damping composite semi-active damper, injection-production string and natural gas, the magneto-rheological fluid and particle damping composite semi-active damper is connected in series on the injection-production string by thread, the annular space formed by injection-production string and casing string is filled with annular filling fluid, when the injection-production operation of natural gas is carried out, the vibration of injection-production string, the magneto-rheological fluid and particle damping composite semi-active damper connected in series on the injection-production string will transfer the vibration energy of injection-production string and convert it into heat energy dissipation to achieve the purpose of vibration reduction.The application can effectively reduce the vibration response of injection-production string, prolong the service life of injection-production string, improve the safety of operation, and has high economic value;when the power is exhausted, it can also be used as a passive damper to achieve good damping effect.

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.