508 results about "Vibration absorption" patented technology

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 invention discloses a sliding rail moving type bus duct structure, and relates to the technical field of bus ducts. Comprising a protection shell, a sliding cover, a wire row and a fixed protection assembly, heat generated by the wire row is transmitted to a self-adaptive baffle through a conduction vibration buffering piece, the self-adaptive baffle generates corresponding bending deformation according to the magnitude of the absorbed heat, and therefore a gap of the corresponding size is generated in a heat dissipation opening, and the purpose of self-adaptive heat dissipation according to the temperature is achieved. The fixing frame is used for fixing a wire row, vibration is transmitted to the conduction shock absorber, part of vibration is absorbed through deformation of the arc-shaped spring piece, the vibration is reduced, the transmission plate is used for driving the damping sliding block to slide in the sliding groove of the protection shell in a reciprocating mode, and friction force generated between the damping sliding block and the damping piece resists movement of the damping sliding block. The vibration amplitude of the damping sliding block is weakened, so that the damping sliding block tends to be static more quickly, vibration of the wire row is converted quickly, and the purposes of vibration reduction and noise elimination are achieved.

The invention relates to the technical field of structural vibration control, in particular to an adjustable electric damping-negative stiffness dynamic vibration absorber for a flexible shafting. According to the technical scheme, the damping device comprises a support and a rolling bearing, a plurality of first supporting rods used for supporting are arranged outside the rolling bearing, an electric damper used for absorbing vibration is arranged at one end of each first supporting rod, and a second supporting rod used for supporting is arranged on the other side, away from the first supporting rods, of each electric damper. A negative stiffness vibration absorber is arranged at the end, away from the electric damper, of the second supporting rod, and the electric damper comprises an auxiliary circular ring used for bearing loads. Through the arrangement of the adjusting plate, the adjusting bolt, the disc spring, the mass block, the movable magnet, the static magnet and the electric damper, the purposes of vibration absorption and vibration reduction can be achieved at the transcritical rotating speed and the supercritical working rotating speed, and the negative stiffness dynamic vibration absorption frequency and the electric damping suppression modal frequency can be rapidly adjusted according to the change of the operation working condition; and the application range and the universality are improved.

A method includes defining a design domain for a meta-element configured to be attached to an edge of thin wall structure with an arbitrary boundary condition, and executing a topological optimization process on the design domain and providing a topology optimized shape for the meta-element. The topological optimization process includes an objective function that minimizes a reflection coefficient of flexural waves in the audible frequency range propagating towards and impinging the meta-element.

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

A vibration absorber arrangement (1) is provided, in particular for tall slender structures, comprising a supporting structure (8), an absorber mass (2) which comprises a center of mass (3), and at least one wheel (4, 5) by means of which the absorber mass (2) is movable on a concavely curved rail arrangement (6), which is connected to the supporting structure (8), from a stable central position in two opposite directions, wherein a friction damper device (9) is provided. One wants to be able to adapt such a vibration absorber arrangement in a simple manner to different operating requirements. For this, it is provided that the friction damper device (9) is adjustable between a first state, in which it does not interact with the absorber mass (2) or only dampeningly, and a second state, in which it controlledly brings a movement of the absorber mass (2) to a standstill.

The invention provides a magnetic hot-melt flame-retardant damping material. The magnetic hot-melt flame-retardant damping material is prepared from the following raw materials in parts by weight: 5-15 parts of an ethylene-vinyl acetate copolymer; 2-6 parts by weight of butyl rubber; 1-4 parts by weight of a styrene thermoplastic elastomer; 8-15 parts by weight of a tackifier; 7.5-17 parts by weight of a filler; 10-20 parts by weight of a flame retardant; 44-56 parts by weight of magnetic powder; and 1-4 parts by weight of a softening agent. Compared with the prior art, the magnetic hot-melt flame-retardant damping material provided by the invention adopts specific components with specific contents to realize relatively good overall interaction, and the obtained magnetic hot-melt flame-retardant damping material has excellent flame retardance, good vibration absorption and noise reduction effects, good flexibility, high-temperature baking resistance, high-temperature adhesion and washing resistance; and the product has the advantages of good storage stability, long shelf life and light weight, and is suitable for sound insulation, noise reduction and flame retardance near an automobile body and a battery pack.

The invention discloses a high-frequency vibration absorption fastener design method for restraining local bending mode vibration of a steel rail. The method comprises the following steps that a finite element analysis model of the steel rail is established according to the set length and steel rail parameters, a rail model under the harmonic excitation condition is established, and a relational expression met by the overall rigidity and damping of a double-layer fastener model is established; constructing a kinetic equation of vertical movement of the iron base plate; constructing a target optimization function for designing the track fastener system based on the error; and constructing a cost model of the fastener in the production process, optimizing cost control of fastener design, outputting the quality of the iron base plate, the rigidity of the upper layer structure and the rigidity of the lower layer structure under the optimal cost control, and designing the fastener system. According to the method, high-feasibility solutions are provided for relieving local bending modal vibration of the steel rail, high-order polygons of wheels and corrugation of the steel rail.

The utility model discloses a steel rail vibration absorber capable of reducing vibration and noise, and relates to the technical field of steel rail vibration reduction. Comprising a damping plate which can be attached to the rail web of the steel rail; the length of the mass block is smaller than that of the damping plate, and the mass block is attached to the outer side of the damping plate in the using state; the elastic metal clamp is clamped in the middle of the vibration absorption mass block in the length direction and can clamp the vibration absorption mass block on a rail foot of a steel rail corresponding to the damping plate; the fixing clamp is provided with two clamping blocks, and the two clamping blocks can be fixedly installed on the two sides of a steel rail corresponding to the damping plate; the number of the fixing clamps is two, the two fixing clamps are used for fixing the corresponding ends of the damping plate to a steel rail, and the inner sides of the two fixing clamps abut against or are clamped to the corresponding ends of the mass block. According to the utility model, the damping plate and the mass block can be stably kept in the midspan position of the track, and the longitudinal movement is reduced.

A rail transit steel rail vibration and noise reduction device comprises damping modules with damping vibration reduction functions, resonance modules with vibration absorption functions and clamps, and is characterized in that the damping modules are symmetrically attached to the two sides of a steel rail and extend to a rail bottom from a rail web, and the clamps are fixed to the damping modules and stretch across the rail bottom to hoop the damping modules to the steel rail; the resonance module is arranged in the longitudinal direction of the steel rail and detachably installed on the damping module, and the clamp and the resonance module are in longitudinal positioning fit with the damping module respectively. The positioning reliability of the damping module on the steel rail is improved, the reliability of vibration and noise reduction is improved, the resonance module is effectively prevented from loosening and shifting, targeted vibration suppression is carried out according to the vibration working condition of a line where the steel rail is located, directional dominant frequency suppression is achieved, high energy caused by specific excitation frequency is solved, energy consumption is improved, and the service life is prolonged. Steel rail vibration is reduced. The invention further provides a rail transit steel rail vibration and noise reduction method.

According to the multi-connecting-rod type automobile suspension device, through cooperative cooperation of a multi-connecting-rod assembly, a damping support, an axle and a damping assembly, wheel vertical vibration caused by the road surface can be efficiently converted into a multi-connecting-rod swing vector, and self-adaptive damping adjustment is achieved by means of a damper and air cylinder composite structure in the damping assembly; impact can be effectively buffered in the compression stroke, springback can be restrained in the stretching stroke, it is ensured that tires continuously grip the ground, meanwhile, sound insulation materials are additionally arranged at the ends of the dampers, running noise is effectively reduced, impact energy in the vertical direction is further absorbed by integrating multiple sets of spiral springs through a drive axle, rigid transmission to an automobile main frame is reduced, and the service life of the automobile is prolonged. The whole structure is high in rigidity and reasonable in spatial arrangement, and has good vibration absorption performance, reliability and comfort, and the driving smoothness, the control stability and the noise vibration comfort of a vehicle are remarkably improved.

To provide a highly reliable vibration isolation device capable of isolating vibration in various direction inexpensively over a wide range through simple adjustment and capable of easily controlling vibration absorption performance and damping performance.SOLUTION: A vibration isolation device includes: a bolt; a first disc spring having a first insertion hole, a first inner peripheral part and a first outer peripheral part; a second disc spring having a second insertion hole, a second inner peripheral part and a second outer peripheral part; a sleeve including a pair of end surfaces through which a bolt is inserted, that oppose to each other in the axial direction and on which the first inner peripheral part and the second inner peripheral part are nipped, respectively by using a fastening tool; and a fixation plate in which the first outer peripheral part and the second outer peripheral part are fixed in an overlapped state and a displacement region of the bolt and the sleeve is opened. The first disc spring has a plurality of first vibration isolation bodies, and the second disc spring has a plurality of second vibration isolation bodies. When vibration is input to the bolt via a vibration isolated member, each of the first vibration isolation bodies and each of the second vibration isolation bodies absorb the vibration and damp the vibration, respectively at positions apart from the sleeve.SELECTED DRAWING: Figure 2

The invention provides a cage bar type broadband damping device arranged in a force-bearing radial plate of an aero-engine. The cage bar type broadband damping device comprises a plurality of cage bars arranged in the force-bearing radial plate in the radial direction, an inner mounting plate, an outer mounting plate, a damping ring, a cover plate and the like. The installation plate is provided with the extending edge, the hollow force bearing radial plate can be installed in the extending edge, then the damping ring, the ends of the cage bars and the cover plate are sequentially installed on the installation plate through bolts, and installation of the cage bar type broadband vibration reduction device can be achieved without modifying the structural form of the force bearing frame. Vibration energy on the force-bearing frame is directionally induced to the cage bars, the vibration energy is dissipated through the damping rings made of metal rubber, so that vibration absorption-energy dissipation in a broadband range and effective control over vibration response of the force-bearing frame are achieved, and the device has the advantages of being simple in structure, small in additional mass, convenient to disassemble and assemble and the like; and design parameters can be adjusted in a targeted mode to adapt to different working environments, and the method has wide application prospects in the field of aero-engine vibration control.

The invention belongs to the technical field of rail vibration reduction test devices, and particularly relates to a vibration reduction test platform. The vibration reduction test platform comprises a single-degree-of-freedom simulation test mechanism which is used for simulating a first-order vertical rigid body vibration modal shape corresponding to a first-order inherent frequency of the floating slab track; the four-point supporting plate simulation test mechanism is used for simulating a high-order rigid body vibration modal shape, bending modal shapes, torsion modal shapes and other modal shapes in a higher-frequency range of the floating slab track; the vibration sensing device is arranged on the single-degree-of-freedom simulation test mechanism and the four-point support plate simulation test mechanism and is used for measuring and collecting force response and acceleration response; a bottom plate; sliding grooves are symmetrically formed in the bottom plate, and the single-degree-of-freedom simulation test mechanism and the four-point supporting simulation test mechanism are arranged on the bottom plate side by side and located between the symmetrical sliding grooves. And the jacking hoisting mechanism is positioned on the bottom plate, is connected with the sliding chute in a sliding fit manner, and is used for hoisting and carrying the test mechanism, mounting the loading mechanism and adjusting test operation.

The invention discloses a forging machine for magnesium alloy forgings, which relates to the technical field of forging machines and comprises a forging base, the top surface of the forging base is provided with a limiting rail and a forging base, the bottom surface of a fixed top seat is connected with a hydraulic machine, the fixed top seat is mounted at the top of the limiting rail, and a vibration absorption forging head is arranged on the limiting rail. The vibration absorption forging head hammers a forging piece on the forging base through output power of the hydraulic machine, a clamping mechanism is arranged on the forging base and used for clamping the forging piece, when the clamping mechanism clamps the forging piece, plastic deformation force generated by the forging piece when the vibration absorption forging head hammers the forging piece is absorbed, and the forging piece is clamped through the plastic deformation force. The clamping mechanism counteracts on the forging part and the forging base by utilizing plastic deformation force; and the forging piece clamping stability and stress uniformity of the clamping mechanism are improved, the forging piece forging yield is increased, and the impact force borne by the whole forging machine is greatly reduced.

In order to solve the problems that the vibration isolation function and the vibration absorption function of an existing vibration suppression device are usually designed separately, and the damping of the vibration absorption device is usually non-adjustable, the multi-stage variable damping broadband vibration suppression device comprises an end cover, screws, a cylinder cover, a cylinder body, a piston rod, an upper spring, a lower spring and a plurality of vibration reduction assemblies, and the cylinder cover and the cylinder body are fixed through the screws; a closed cavity is formed by the cylinder cover and the cylinder body, the cavity is filled with magnetorheological fluid, the piston rod sequentially penetrates through the end cover, the cylinder cover, the damping assemblies and the bottom of the cylinder body, the second damping assembly is fixedly connected with the piston rod, and the first damping assembly and the second damping assembly are connected through an upper spring. The second vibration reduction assembly and the third vibration reduction assembly are connected through a lower spring. The vibration isolator has the advantages of being compact in structure and integrating vibration isolation and vibration absorption, and is suitable for occasions needing independent vibration isolation or vibration absorption and occasions needing simultaneous vibration isolation or vibration absorption. The invention belongs to the technical field of satellite platform vibration control.

The invention provides a three-way combined type vibration isolation device based on an adjustable damping magneto-rheological vibration absorber, the vibration isolation device is connected with an air compressor, the vibration isolation device comprises blades used for stirring magnetic fluid, and when the vibration isolation device is vibrated, the blades are used for stirring the magnetic fluid. The magnetic fluid is stirred by the blades to dissipate energy so as to suppress the vibration amplitude transmitted to the lower layer of the vibration isolator; the vibration isolation device adjusts the vibration reduction effect by changing the angle of stirring the magnetic fluid blades, or changes the viscosity of the magnetic fluid according to the change of the rotating speed of the air compressor, and adjustable vibration reduction control in a wide frequency domain is formed. The variable-frequency air compressor has the fluid vibration absorption capacity and the metal rubber vibration absorption capacity at the same time, meanwhile, the viscosity of the magnetic fluid can be changed according to the change of the rotating speed of the variable-frequency air compressor, and then the wide-frequency-domain and adjustable vibration reduction control effect is achieved.

The invention provides a ground laying long-distance pipeline vibration monitoring device and a control method thereof.The ground laying long-distance pipeline vibration monitoring device comprises a shell, a vibration monitoring module, a wireless transmission module, an energy storage battery and an electric drive executing mechanism, and the vibration monitoring module, the wireless transmission module, the energy storage battery and the electric drive executing mechanism are arranged in the shell; the electric drive executing mechanism is connected with a valve rod of the control valve body. The vibration monitoring module is used for collecting pipeline vibration signals and controlling the electric drive executing mechanism to act according to the vibration signals so as to drive the valve opening degree of the valve body, and the vibration monitoring module is connected with a far-end monitoring platform through the wireless transmission module so as to conduct outer end monitoring control on the vibration monitoring module. The vibration absorption module and the power generation module are arranged on the long-distance pipeline, the vibration absorption module is connected with the power generation module, and the power generation module is connected with the energy storage battery. Rapid response, accurate adjustment and rapid early warning of abnormal vibration of the pipeline can be achieved, and safe and stable operation of a pipeline system is ensured.

The invention belongs to the technical field of vibration and noise reduction, and particularly relates to a gradual change multi-vibrator vibration absorber based on periodic acoustic black holes. The device comprises multiple layers of eccentric rectangular discs which are arranged from bottom to top and connected through connecting columns, the sizes of the eccentric rectangular discs are gradually reduced from bottom to top, and each eccentric rectangular disc structurally comprises a rectangular column at an internal eccentric position, an external lower rectangular ring and an acoustic black hole located between the rectangular column and the lower rectangular ring; the upper ends of the rectangular column, the lower rectangular ring and the acoustic black hole are coplanar, and the upper end of the lower rectangular ring is also provided with an upper rectangular ring with the same size in the plane direction; the thickness h (wi) of the acoustic black hole is gradually increased from each inner edge of the lower rectangular ring to the inside in an index form of h (wi) = awim, i = 1, 2, 3 and 4, the outer edge thickness of the acoustic black hole is consistent with the thickness of the lower rectangular ring, and the inner edge thickness of the acoustic black hole is consistent with the height of the rectangular column. Through the energy focusing effect and the dynamic vibration absorption effect of the acoustic black holes, the eccentric rectangular disc can act on more frequencies, and the broadband vibration reduction effect can be achieved.

The invention provides an automatic compensation floating experiment device and method for an underwater test, and the device comprises an automatic compensation device which is installed above a floating water tank, the floating water tank is connected with a suspension water tank through a vibration absorption device, and the suspension water tank is connected with a steel wire rope winding and unwinding device; a water level detection device and a posture detection device are respectively mounted in the floating water tank and the suspension water tank; the automatic compensation device comprises an upper cover, the upper cover is arranged on a mounting shell in a sleeving mode, two sets of crossed ball screws are mounted in the mounting shell, one end of each ball screw is connected with a fixed support, the other end of each ball screw is connected with a servo motor through a coupler, and each ball screw is provided with a flange through a bolt. By adjusting the length of the steel wire rope and the position of the suspension water tank, different cabin parameters are simulated, an underwater explosion test is carried out, the accuracy of test data is effectively improved, the service life of equipment is effectively prolonged, and the scientific research cost is reduced.

The invention discloses an optical thermostat with comprehensive vibration reduction and low-temperature in-situ displacement functions, which adopts upper and lower opposite vibration absorbers and a large-mass base to realize first-order to second-order inertial vibration absorption, and further realizes thorough decoupling with an optical platform in a suspension type non-contact manner, and the vibration transmissibility can be reduced to be less than 10%. Resonant frequencies of two systems (a sample table system and a cold head system) are designed to achieve vibration decoupling. The technical problems that in the prior art, the high-grade vibration isolation capacity is insufficient, refrigerator noise is easily coupled to a measuring light path, the low-temperature in-situ precision displacement capacity is lacked, and the contradiction between heat isolation, convenience and cost is difficult to balance can be solved. Under the support of a conventional GM refrigerator, the comprehensive requirements of ultralow basic vibration, strong decoupling of a measurement light path, low-temperature in-situ micron-sized displacement, convenient sample replacement and efficient refrigeration / thermal control are met at the same time.

The utility model discloses a high-power vibroflot for deep stratum foundation treatment, which comprises a shell, a case and a material guide pipe, the shell and the case form a vibroflot body, an eccentric component is rotatably arranged in the shell, a hollow motor is arranged in the case, the hollow motor drives the eccentric component, and the material guide pipe is connected with the eccentric component. According to the high-power vibroflot for deep stratum foundation treatment, a vibration absorption structure is arranged at the connecting position of the guide rod and the vibroflot through structural cooperation, the resonant frequency of the guide rod is reduced, the vibration absorption effect is improved, the vibration absorption effect is improved, and the service life of the vibroflot is prolonged. Meanwhile, due to the coaxial hollow design, conveying of various media is facilitated.

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 variable stiffness system used as both a vibration isolation system and a vibration absorption system in systems ensures the protection of vibration-sensitive mechanical, optical, and electronic devices from vibration in industrial activities, and is also used as a variable stiffness spring or joint in robotic and biomedical fields.

The invention relates to a piezoelectric type negative stiffness collaborative vibration absorption supporting rod for a helicopter rotor dynamic load. The piezoelectric type negative stiffness collaborative vibration absorption supporting rod comprises an upper supporting rod body, a lower supporting rod body and a vibration absorption assembly which is arranged between the upper supporting rod body and the lower supporting rod body and used for vibration isolation. The vibration absorption assembly comprises an auxiliary circular ring used for bearing a static load, a lever spring and a disc spring used for providing negative stiffness and adjustable pre-compression are arranged in the auxiliary circular ring, and a mass block used for absorbing and dissipating vibration energy is arranged below the disc spring; the two sides of the lever spring make contact with the piezoelectric ceramic stack, the piezoelectric ceramic stack is connected with the multi-mode external circuit module, the multi-mode piezoelectric shunt damping effect is formed, and meanwhile a plurality of mode components of the system are controlled. When vibration is large, electric energy is stored, and when vibration is small, the mode is switched to a multi-mode RLC circuit dissipation mode, and mechanical vibration energy is converted into electric energy which is consumed through the circuit. Negative stiffness dynamic low-frequency broadband vibration absorption and piezoelectric shunt multi-mode suppression are coupled, and the effect of efficient vibration isolation is achieved.

The invention relates to the field of vibration reduction devices, and particularly discloses a low-frequency bearing-resistant acoustic black hole vibration reduction element which comprises a plurality of acoustic black hole sheet bodies, elastic bodies and isolation pieces, the acoustic black hole sheet bodies are arranged at intervals in the thickness direction of the acoustic black hole sheet bodies, and each acoustic black hole sheet body comprises a sheet body and an acoustic black hole formed in the sheet body; the elastic bodies are fixedly connected between two adjacent sheet bodies, and the elastic bodies and the sheet bodies are made of different materials; and the separator is fixedly arranged on the sheet body and is used for reducing secondary noise formed by interference between the sheet body and the acoustic black hole. The acoustic black holes and the spiral lines are combined, the acoustic black hole sheet bodies and the elastic bodies are periodically arranged and assembled, the vibration absorption effect, the acoustic black hole effect and the band gap effect are integrated, and the low-frequency broadband vibration absorption effect can be achieved.

The invention relates to the technical field of rail traffic, in particular to a dumbbell-shaped frequency-adjustable steel rail vibration absorption device for inhibiting steel rail corrugation, which comprises a mass block, a connecting rod piece and two steel rail connecting and fixing buckles independent from each other, wherein the two steel rail connecting and fixing buckles are matched with the structural form of a steel rail and correspondingly installed on the left side and the right side of the steel rail, and the two steel rail connecting and fixing buckles located on the two sides of the steel rail are transversely connected and fixed through a connecting piece to form a whole. The connecting rod piece is installed on the steel rail connecting and fixing buckle, and the mass blocks are hung at the two ends of the connecting rod piece in a sleeving mode. The device has the advantages that vibration energy is effectively dissipated through a mechanical energy conversion mechanism, the service life of a rail and vehicle parts is prolonged while rail corrugation is relieved, noise pollution to the surrounding environment is reduced, and the maintenance cost is reduced.

The utility model relates to the technical field of double-suction pumps, and provides a damping type double-suction pump which comprises a double-suction pump body and a damping machine box, the top of the damping machine box is not closed and is connected with a double-suction pump installation table in a vertical sliding and clamping mode, and first installation grooves are formed in the box walls, close to the four corner ends, in the damping machine box. A transfer damping assembly is mounted in each first mounting groove, a mounting plate is further arranged at the position, below the double suction pump mounting table, in the damping case, a working damping assembly is mounted at the top of the mounting plate, and a jacking mechanism used for lifting and supporting the working damping assembly to the bottom face of the double suction pump mounting table is mounted at the bottom in the damping case. According to the damping type double-suction pump, vibration absorption and weakening of the double-suction pump in the working and transferring states are fully considered in design, flexible switching and stable operation between modes are achieved through accurate design of the jacking mechanism and the guide assembly, and therefore efficient, stable and reliable operation of equipment is guaranteed.

The invention belongs to the technical field of mechanical vibration, and particularly relates to a multi-degree-of-freedom dynamic vibration absorber and an adjusting method. The multi-degree-of-freedom dynamic vibration absorber comprises a connecting bottom plate, a protective cover, a rubber block and a top plate; the connecting bottom plate and the protective cover are detachably connected to form a closed cavity, the bottom surfaces of the rubber blocks are fixed on the surface of the connecting bottom plate in the closed cavity, and the top surfaces of the rubber blocks are connected with the top plate. When the inherent frequency is consistent with the frequency of the controlled structure, the optimal dynamic vibration absorption effect can be achieved.

The invention discloses a structural noise suppression system and method.The system comprises an array composed of a plurality of independent vibration absorption units, and the array is used for being attached to a vibration structure to suppress structural noise; the vibration absorption unit comprises a vibration absorber and a shunt circuit; the vibration absorber at least comprises a piezoelectric element and is used for sensing vibration and outputting a voltage signal, and the shunt circuit is used for collecting the voltage signal and adjusting parameters of the shunt circuit according to the voltage signal, so that the resonant frequency of the vibration absorber is adjusted; wherein when the shunt circuit works, if the voltage signal is increased, the change trend of the current circuit parameter is maintained, and if the voltage signal is reduced, the circuit parameter is adjusted to change along the direction opposite to the current change trend. According to the system, the resonant frequency of the vibration absorber in the system is adjusted by adjusting parameters of the shunt circuit, the effect that the working frequency of the system actively follows the vibration frequency of the structure is achieved, the vibration absorption unit is simple in structure, and the working frequency band is easy to expand.