55results about How to "Achieve dissipation" patented technology

The invention provides a compression-shear separated variable-stiffness vibration isolation support and a manufacturing method thereof. The support comprises an upper support plate, a lower support plate and a vibration isolation assembly arranged between the upper support plate and the lower support plate. The vibration isolation assembly comprises a vertical vibration isolation assembly and a horizontal vibration isolation assembly. The vertical vibration isolation assembly comprises long vertical springs, short vertical springs, a damper, a limiting block groove and a limiting block. The horizontal vibration isolation assembly comprises a core steel rod, a steel sleeve and a pre-tension sleeve piece. The pre-tension sleeve piece comprises a sliding ring, a unit of shape memory alloy rods and a unit of locking nuts. The support is simple in structure and simple in machining technique, all the parts and components can be obtained and assembled easily, installation is convenient, and the cost performance is high. All the parts of the support are made of metal materials and are good in durability. Meanwhile, the stress path is clear, the vertical force and horizontal force are borneby different parts of the support, compression-shear separation can be effectively achieved. The energy-dissipating capacity and the self-resetting capacity are high. The vertical and horizontal rigidity of the support is adjustable and controllable, and vibration isolation and displacement constrain under different earthquake motions are achieved.

The invention relates to a detachable U-shaped corrugated belt double-layer inclined-slit steel plate damper, and belongs to the technical field of civil engineering energy dissipation and shock absorption. The metal damper is composed of a plurality of U-shaped energy dissipation parts, double-layer inclined-slit steel plates, an upper cover plate and a lower cover plate. The metal damper is based on the design concepts that multidirectional energy dissipation is achieved, energy dissipation parts are detachable, the shear bearing capacity is improved, out-of-plane buckling is restrained, multiple shear energy dissipation mechanisms work cooperatively, and a double-insurance mechanism is adopted, and the limitation of a traditional metal damper is broken through. U-shaped energy dissipation units are connected in parallel, so that the multidirectional energy dissipation of the damper is effectively realized. Through a reasonable design, the damper can achieve multi-position yield, theenergy dissipation performance is stable, and the shear bearing capacity is greatly improved. The U-shaped energy dissipation parts and the double-layer inclined-slit steel plates dissipate energy together to form the double-insurance mechanism. After an earthquake, the normal use function can be recovered only by replacing the energy dissipation parts. The metal damper develops towards the assembling direction, is easy and convenient to replace and obvious in economic benefit, can be effectively combined with a support, and provides lateral force for the support.

The invention discloses a six-degree-of-freedom active landing buffer device for a spacecraft and a buffer control method. The buffer device is composed of a platform and buffer legs. The platform isconnected to three sets of buffer legs in the same state, and also bears the weight of a spacecraft structure. The buffer legs have three degrees of freedom, and the ends of the buffer legs can arbitrarily move in a three-dimensional space. When the spacecraft lands on rugged ground with an arbitrary attitude, the buffer device calculates the buffering force and moment required by a spacecraft fuselage according to the attitude and speed of the spacecraft fuselage. According to the configuration of the buffer legs at the moment when the spacecraft fuselage lands on the ground, the buffer forceand moment of the spacecraft fuselage are distributed to each buffer leg. By controlling the motor current of buffering leg joints, the required buffering force at the foot ends of the buffering legsis generated. The buffer device provided by the invention can maintain the spacecraft fuselage attitude stability while dissipating the kinetic energy of the spacecraft landing, and realize the softlanding of the spacecraft in any terrain environment.

The invention discloses a rotating type friction energy dissipation wall, and relates to the field of seismic reduction control of building structures. The invention aims at providing a friction energy dissipation wall capable of realizing energy dissipation-seismic reduction by using displacement deformation in a structure under the action of an earthquake. In order to realize the aim, the rotating type friction energy dissipation wall is characterized in that a movable frame is connected between upper and lower beams of a building; a plurality of transverse friction steel plate groups and aplurality of longitudinal friction steel plate groups are arranged in the movable frame, and the horizontal friction steel plate groups and the longitudinal friction steel plate groups are overlappedin a crossed way; movable friction nodes are arranged at the overlapped parts. When the building structure is subjected to a horizontal earthquake action, the movable frame is deformed, the friction nodes are rotated, and energy dissipation is achieved by means of mutual friction of transverse friction steel plates and longitudinal friction steel plates. The stability of friction between the friction steel plates can be maintained by means of friction plates in the friction nodes, and hard gaskets in the friction nodes can prevent the friction steel plates from being damaged, so that the service lives of the friction steel plates are prolonged.

The invention relates to a Moebius vibration isolator based on a wave mode conversion mechanism and an energy local effect. The Moebius vibration isolator is formed by combining multiple Moebius banded structures, and the multiple Moebius banded structures are connected into an integral structure through an upper part bearing force platform and a lower part bearing force platform; and the upper part bearing force platform and the lower part bearing force platform are respectively connected with upper part inclined plane regions and lower part circular arc regions of the Moebius banded structures. The Moebius vibration isolator provided by the invention couples the bending rigidity and torsional rigidity of the Moebius banded structures, the energy local region property is taken as an vibration isolation structure of a vibration isolation mechanism, and the Moebius vibration isolator has the advantages of large load-carrying ability, small static transformation, low inherent frequency, higher damping, and is capable of realizing low-frequency broad band transfer admittance and can not generate creepage, aging and temperature sensibility and the like.

Disclosed are an electrostatic discharge protective structure and a formation method therefor. The electrostatic discharge protective structure comprises a substrate, a first gate structure, a first doping region, a second doping region, a first conductive structure, a second conductive structure, and a first heat dissipation structure, wherein fin parts are formed on the surface of the substrate; the first gate structure transversely crosses the fin parts; the first doping region is positioned in the fin parts on one side of the first gate structure; the second doping region is positioned in the fin parts on the other side of the first gate structure; the first conductive structure is positioned on the surface of the first doping region; the second conductive structure is positioned on the surface of the second doping region; and the first heat dissipation structure is positioned on the first gate structure and is in contact with the first gate structure. By means of setting the first heat dissipation structure which is in contact with the first gate structure on the first gate structure, the heat on the first gate structure can be exported, so that the heat of the first gate structure can be dissipated through heat conduction of the heat dissipation structure; and therefore, the problem of self-heating of the electrostatic discharge protective structure is relieved, and the performance of the electrostatic discharge protective structure is improved.

The invention provides a spacing padded heat collection evaporation fabric with a loop structure. The fabric comprises a heat collection evaporation layer, a floating heat insulation layer and a waterabsorption layer which are sequentially arranged; the heat collection evaporation layer, the floating heat insulation layer and the water absorbing layer are bundled into a whole through mutually-interweaved spacing yarn with a water guiding function; the loop structure used for increasing the contact area of sunlight and air is arranged on the surface of the heat collection evaporation layer. The invention further provides a preparation method, use method and application of the spacing padded heat collection evaporation fabric with the loop structure. The fabric can float on the water surface, moisture is transmitted from the water absorption layer to the heat collection evaporation layer through the spacing yarn, and the heat collection evaporation layer is used for absorbing heat of sunlight to achieve moisture evaporation. The contact area between the fabric and air is increased through the loop structure, and the moisture evaporation efficiency is improved. The fabric is of a three-dimensional integrated structure, is low in weight, high in strength, simple in structure and capable of achieving industrial production, and has important application prospects in the fields of sea water desalination and sewage treatment.

The invention provides a three-dimensional filling structure heat collecting evaporation fabric which comprises a heat collecting evaporation layer, a floating heat insulation layer and a water absorbing layer which are sequentially arranged; the heat collecting evaporation layer, the floating heat insulation layer and the water absorbing layer are bound into a whole through binder yarn with the water guiding function. The invention further provides preparation and using methods and application of the three-dimensional filling structure heat collecting evaporation fabric. The fabric can floaton the water surface, water is conveyed to the heat collecting evaporation layer from the water absorbing layer through the binder yarn, and water evaporation is achieved by absorbing heat of sunlightthrough the heat collecting evaporation layer. The fabric has the three-dimensional integrated structure, is low in mass, high in strength and simple in structure, and can achieve industrialized production; the important application prospect is achieved in the field of seawater desalination and sewage treatment.

The invention discloses an overhead power transmission line vibration reducing and balancing system. An overhead power transmission line is installed on a power transmission tower in a hanging way via insulators. Spacers are arranged between all the conductive wires of the overhead power transmission line. The spacers are connected with the conductive wires via wire clamps. The wire clamps are rotatably connected with the spacers. Spring damping vibration reducing devices are connected below the spacers. Each spring damping vibration reducing device comprises at least one group of spring damping vibration reducing component. The spring damping vibration reducing component comprises a cylinder which is internally provided with antifreeze liquid, a damping spring and a steel ball. The damping spring is connected with the steel ball. Vibration reducing tracks are arranged on the vibration damping tower. The vibration reducing tracks are different in height. The top ends of the insulators are provided with vibration reducing rollers which are arranged on the vibration reducing tracks. The vibration reducing rollers are connected with vibration reducing springs. Galloping of the icing conductive wires of the overhead power transmission line can be effectively suppressed so that safe operation of a power grid can be guaranteed.

The invention discloses a method for swash suppression of an adjustable liquid tank. One or more longitudinal partition plates distributed discontinuously are arranged at the bottom of the liquid tank in the length direction of the ship, a plurality of sliding rails are arranged in the transverse direction, and the longitudinal partition plates are connected with the sliding rails to move in the width direction of the ship. The longitudinal partition plate is connected with the bulkhead through a spring and a damper. The stiffness coefficient of the spring and the damping coefficient of the damper can be adjusted in real time, parameters of the spring and the damper are adjusted according to the liquid carrying rate of the liquid tank and monitoring of external excitation, the actual first-order resonance frequency of liquid in the tank is made to be far away from the external excitation frequency, and resonance is prevented. Meanwhile, when the liquid in the tank sloshes, the energy of liquid sloshing can be absorbed and dissipated under the combined action of the longitudinal partition plate, the spring and the damper, so that the impact pressure borne by the whole wall face of the liquid tank is reduced, and the service life of the longitudinal partition plate is prolonged. Therefore, according to the scheme, the probability of safety accidents caused by sloshing of the liquid tank is reduced, and the ship traveling safety is guaranteed.

The invention relates to an integrally-replaced U-shaped belt corrugated energy dissipation part damper, and belongs to the technical field of civil engineering energy dissipation and shock absorption. The metal damper is composed of a plurality of U-shaped energy dissipation parts, double-layer corrugated energy dissipation parts and two cover plates. The metal damper is provided based on the design concepts of multi-directional energy dissipation, improvement of shear bearing capacity, inhibition of out-of-plane buckling, improvement of structural rigidity, cooperative work of multiple shearenergy dissipation mechanisms, a double-insurance mechanism and the like, and the limitation of a traditional metal damper is broken through. The U-shaped energy dissipation units are connected in parallel, so that the multidirectional energy dissipation of the damper is effectively realized. Through a reasonable design, the problem that the damper is not prone to generating plastic energy dissipation and needs to dissipate energy of a main body structure in a small earthquake is solved. All the components enter plasticity during a large earthquake, so that the U-shaped energy consumption piece and the double-layer waveform energy consumption piece consume energy together, a double-insurance mechanism is formed, the shear bearing capacity is improved, the energy consumption performance isstable, and only the energy consumption components need to be replaced after the earthquake to recover the function; the metal damper is easy and convenient to replace, obvious in economic benefit and capable of being effectively combined with the support and providing lateral force for the support.

The invention discloses a two-dimensional eccentric rotation nonlinear energy sink device and a vibration absorption and energy consumption method. The two-dimensional eccentric rotation nonlinear energy sink device comprises a base connected with an external main structure and a rotating disc, wherein the rotating disc is arranged on the base, and a spring clamp is arranged on the rotating disc; a friction guide rail is connected to the rotating disc through a buckle; a support guide rail is vertically connected with the friction guide rail through a buckle; the support is connected to the support guide rail through a buckle; a vibrator is arranged on the friction guide rail to slide; and tension and compression springs are hinged to the support and the vibrator and are symmetrically arranged on the two sides of the vibrator. The two-dimensional eccentric rotation nonlinear energy sink device is advantaged in that the nonlinear energy trap structure can be rotated according to the plane vibration direction of the main structure, and vibration energy can be absorbed and dissipated in any direction of a two-dimensional plane.

The invention provides a viscoelastic damper and a building installation structure thereof, and relates to the technical field of building structure energy consumption and vibration reduction. The viscoelastic damper is designed for solving the problem that the use temperature of existing viscoelastic dampers is limited. The viscoelastic damper comprises a first outer side steel plate layer, a first elastic layer, an intermediate steel plate layer, a second elastic layer and a second outer side steel plate layer which are closely connected in sequence in the thickness direction of the damper,wherein a first core hole penetrating through the first elastic layer is formed in the first elastic layer, and the first core hole is filled with a first damping layer; a second core hole penetratingthrough the second elastic layer is formed in the second elastic layer, and the second core hole is filled with a second damping layer; and the first damping layer and the second damping layer comprise a plurality of friction particles correspondingly. The building installation structure of the viscoelastic damper comprises the viscoelastic damper. According to the viscoelastic damper and the building installation structure thereof, the energy consumption capacity has little correlation with the temperature, the viscoelastic damper and the building installation structure thereof can be suitable for the low-temperature environment, and the temperature use range of the viscoelastic damper is increased.

The invention discloses a damping device and method for restraining cutting chatter of a machine tool spindle and the machine tool spindle. Through a ball screw and a damping seat of a cylindrical structure, one end of the ball screw is arranged in a rotating groove, a ball screw nut is arranged at the open end of the damping seat, an ejector rod is fixedly connected to the end of the ball screw nut, the ejector rod slides in the axial direction under the cutting chatter effect of the spindle, the ejector rod drives the ball screw nut to slide in the axial direction, and the ball screw matched with the ball screw nut converts translation of the ejector rod into rotation, so that fan blades fixed to the ball screw are driven to rotate in a magnetorheological fluid, radial reciprocating vibration, caused by chatter, of a spindle system is converted into reciprocating rotation of the fan blades in the magnetorheological fluid through the ball screw and the fan blades, and vibration energy is dissipated under the action of damping force applied by the magnetorheological fluid. Damping of a machine tool system is changed, the structure is small and exquisite, and mounting is easy.

The invention relates to an optical fiber connector, which comprises a shell with a hollow through hole, a sleeve and a protective element, and is characterized in that an optical fiber penetrates through the hollow through hole; the sleeve is located in the hollow through hole and used for fixing the optical fiber; and the protective element is located between the optical fiber and the sleeve and used for realizing heat dissipation. According to the invention, heat dissipation is realized through setting the protective element between the end part of the optical fiber and the sleeve, the heat dissipation capacity of the end part of the optical fiber is improved, and the possibility that the tube wall temperature of the sleeve is enabled to rise because light leak at the end part of the optical fiber is reduced, thereby being conducive to reducing burnout of the optical fiber due to too high temperature of the sleeve, and facilitating to improve the power of laser transmitted in the optical fiber.

The invention belongs to the technical field of hydroacoustic engineering, and provides a hydroacoustic multi-layer composite acoustic structure. The hydroacoustic multi-layer composite acoustic structure is provided with a support skeleton (3), the support skeleton (3) is formed by connecting longitudinal beams (5) and transverse beams (1), sound absorbing layers (2) are arranged at the outer side of the support skeleton (3), a resonance cavity which consists of at least two sound isolation layers (4) and at least one fluid cavity (5) is filled in a center cavity of the support skeleton (3), and a counterweight (7) is filled in each sound isolation layer (4) and is used for fixing the corresponding sound isolation layer (4), and performing the buoyancy and gravity adjusting function. The hydroacoustic multi-layer composite acoustic structure has the advantages that the installation is convenient, the structure type is simple, the sound absorbing property at the wide band is excellent, and the hydroacoustic multi-layer composite acoustic structure can be applied to the fields of anechoic tanks, ship sonar cabins and the like.

The invention discloses a heterogeneous high damping magnesium alloy. The content of Sn in the alloy is 0.01-50wt%. The alloy is prepared through the following steps: adding magnesium ingots into a well resistance furnace, melting, and adopting an SF6 protection gas in the melting process; heating the magnesium ingots to 750DEG C for fusion, adding a certain proportion of tin ingots and other alloy elements, and carrying out heat insulation in the 680-730DEG C furnace for 20-40min; standing for cooling after the heat insulation ends, and casting in protection atmosphere; and carrying out solid solution treatment on the above obtained cast alloy at 460-500DEG C for 24h, carrying out water cooling, and ageing by carrying out heat insulation at 200-240DEG C for 10-24h. The heterogeneous high damping magnesium alloy has dislocation and phase boundary composite controlled damping characteristic, and has excellent damping performance.

The invention relates to the field of barrier design, and in particular relates to a wind-resistant enclosure structure of a large-span bridge, which adopts a honeycomb wind barrier, and effectively dissipates wind energy through sudden expansion backflow and hole plug energy dissipation principles in fluid dynamics, so that the dynamic effect of wind load on a train is reduced. The current situation that an original wind barrier does not reduce the total influence of wind energy and only distributes the proportion of wind acting on the bridge or the train is changed. According to the wind-resistant enclosure structure, dissipation of wind load energy is truly achieved, the honeycomb-shaped structure is adopted, and the influence of the wind barrier on the aerodynamic performance of the bridge is reduced through almost 100% of the aperture ratio; meanwhile, hexagonal hole channels enable wind energy to be effectively dissipated through sudden expansion backflow and hole plug energy dissipation principles in fluid dynamics, and therefore the dynamic effect of wind load on the train is reduced.

The invention relates to an efficient damping type composite floor structure which comprises a fiber cement board, a plurality of I-shaped steel beams, a concrete layer and a composite damping layer, the I-shaped steel beams are arranged on the fiber cement board, and a plurality of damping strip pipes are arranged on the I-shaped steel beams; the two sides of the I-shaped steel beams are filled with the concrete layers, so that the concrete layers and the I-shaped steel beams jointly form a layer structure. The composite damping layer is arranged above the concrete layer and the I-shaped steel beam and comprises an internal metal-nonmetal damping layer and a polyurethane damping layer wrapping the metal-nonmetal damping layer. Compared with the prior art, the efficient energy consumption type I-shaped steel structure is constructed through cooperation of the damping strip pipes and the I-shaped steel, so that vibration energy transmitted in the vertical direction of the I-shaped steel is obviously consumed; and meanwhile, step-by-step energy consumption is achieved through a metal-nonmetal damping layer in the composite damping layer, and dissipation of edge and surface vibration is achieved in cooperation with an energy dissipation structure of the polyurethane damping layer.