52results about How to "Strong damping capacity" patented technology

The invention discloses a buffer damping anchor stock. The buffer damping anchor stock comprises a capstan used for winding steel slings, a lower stock body capable of being inserted into and fixed to side slope soil, an upper stock body which is in rotation fit with the capstan and a magneto rheological fluid assembly used for applying rotation damping force to the capstan. The magneto rheological fluid assembly comprises a magneto rheological fluid cavity formed inside the upper stock body and a damping rod which penetrates through the magneto rheological fluid cavity in the axial direction and is in rotation fit with the upper stock body. A blade is fixed to the rod section, located in the magneto rheological fluid cavity, of the damping rod and the damping rod is in transmission fit with the capstan. An electromagnetic coil is wound outside the magneto rheological fluid cavity. The anchor stock can be connected with a support net after the steel slings are wound on the anchor stock, and adaptability adjustment of the damping force of the support net on fallen rocks can be conducted by the anchor stock according to impact force of the fallen rocks, so that the phenomenon that the support net is fractured due to excessive loads is avoided and meanwhile the strength of the support net is utilized to the greatest extent.

The invention provides a high-performance fluid damnailg vibration isolator. The high-performance fluid damnailg vibration isolator comprises an upper connecting piece, a lower connecting piece, a rigid rod, an upper main corrugated pipe, a lower main corrugated pipe, an upper buffering corrugated pipe and a lower buffering corrugated pipe, wherein a damnailg hole is formed in the axis of the rigid rod, a first flange is arranged outside the rigid rod, the inner rings of a second flange and a third flange are connected with the two ends of the rigid rod through a diaphragm spring, and the outer rings of the second flange and the third flange are fixedly connected with the upper connecting piece; the upper main corrugated pipe is located between the first flange and the second flange, and the lower main corrugated pipe is located between the first flange and the third flange; the upper buffering corrugated pipe is arranged on the upper side of the second flange, and the lower buffering corrugated pipe is arranged on the lower side of the second flange; the upper main corrugated pipe, the lower main corrugated pipe, the upper buffering corrugated pipe and the lower buffering corrugated pipe are communicated with the damnailg hole and are filled with a fluid medium. The high-performance fluid damnailg vibration isolator has the advantages of being free of friction and fluid damnailg, high in bending rigidity, and capable of improving the performance and application range of the isolator.

Provided are three-dimensional truss type periodic cellular materials, wherein a plurality of internal cells are formed periodically and part of the internal cells are filled with solid material like as metal, ceramic, synthetic resin, or composite materials for the purpose of preventing buckling of the truss elements when external compressive or shear loads is applied to the truss structure. By filling only parts of internal cells provided in the truss with appropriate solid materials, the buckling of truss elements can be suppressed maximally and effectively, and even if the buckling accidentally occurs, the sharp decline of strength can be prevented so as to ensure sufficient structural stability of the truss type periodic cellular materials.

The invention provides a horizontal and vertical multi-dimensional vibration isolation and energy consumption system of a prefabricated assembling type cantilever framework. The system is mounted between an upper structure and a lower structure, and a gap for allowing the system to vibrate vertically is formed; the system comprises a horizontal vibration isolation subsystem and a vertical vibration isolation subsystem; the horizontal vibration isolation subsystem is located above the vertical vibration isolation subsystem and is composed of a horizontal slide support and SMA spring limiting devices; the SMA spring limiting devices are uniformly distributed in the radial direction and are connected with the horizontal slide support in parallel to work; the vertical vibration isolation subsystem is composed of a plurality of single-truss cantilever frameworks; the horizontal plane of each single-truss cantilever framework is internally connected with SMA rods which are distributed in an X shape. The horizontal vibration isolation subsystem and the vertical vibration isolation subsystem are coupled through a slide block of the horizontal slide support to form a multi-dimensional vibration isolation mechanism. The system can be used for effectively absorbing three-dimensional seismic oscillation, and is high in damping capability and reliable in performance, and can be automatically reset.

The invention provides a self-restoring ductility steel support adopting shape memory alloys (SMA). The support is mainly composed of rectangular steel plates, end plates with openings, steel pipes with holes, movable slide blocks, SMA bundles / wires and corresponding connecting parts. One ends of the rectangular steel plates are welded, and the other ends of the rectangular steel plates are clamped to the end plates through end anchorage devices. Through contact force transmitting, the slide blocks are arranged at the holes of the steel pipes, and the SMA bundles / wires are symmetrically wound onto the upper portions of the slide blocks. When moving relative to the steel pipes, the inner support bodies consume energy and provide stiffness and the bearing capacity through the two sets of tensile rectangular steel plates achieving pinch hysteretic characteristics, and the restoring function of the SMA bundles / wires wound onto the slide blocks at a tensile state all the time is achieved. The self-restoring ductility steel support adopting the SMA has the advantages of being good in storing capacity, high in axial deformation capacity, large in axial stiffness, high in bearing capacity, low in manufacturing cost, convenient to construct and the like. The self-restoring ductility steel support adopting the SMA is suitable for serving as a main lateral force resisting component of an aseismic structure and has wide engineering application prospects in an seismic fortified area.

The invention discloses a UV polymerization type body foamed damping material. The UV polymerization type body foamed damping material comprises components in parts by weight as follows: 20-30 parts of an acrylate copolymer, 70-75 parts of a reactive diluent, 0.5-0.8 parts of a photoinitiator and 1-5 parts of hollow inorganic nanoparticles. The high-performance damping material is prepared through UV polymerization, and a solvent-free and pollution-free product is realized thoroughly. The hollow inorganic nanoparticles are taken as an inorganic body foaming agent, the product density can be controlled precisely according to requirements through control of adding amount of the hollow inorganic nanoparticles, and the loss factor of the product can be controlled and increased. The damping material has the advantages of excellent initial adhesion, persistent adhesion, peel strength, interfacial wettability and high loss factor.

This invention relates to a kind of fission type dynamic automobile judge, the character is the invention includes two small weighing platform, and two small weighing platform disposal spacing fit for automotive wheel span. Each small weighing platform all composed by bearing plate, bearing rack, frame and weighting sensor group, each length all accord with wheel width when automobile drive past; the gap between small weighing platform frame and bearing plate has rubber plate for absorbing shock; below the small weighing platform's bearing rack there have three sensors, two of them sit in two adjacent angle of frame, one sit in another two angle's in-between position of frame, bearing rack via supporting stopcock be on sensor. This invention has low vibration strength, small vibration noise, high accuracy of weighting, and using less steel, reducing quantity of excavating installation work. Maintenance is convenience too.

The invention relates to the field of passive filters, in particular to a high-frequency filter applied to a grid-connected inverter. The high-frequency filter comprises an IGBT converter, a first inductor (L1), a second inductor (L2) and an RC damping branch, wherein the output of the IGBT converter is connected with the first inductor (L1); an output end is connected with a power grid through the second inductor (L2); the RC damping branch comprises a fifth capacitor (C5) and a damping resistor (R7); the fifth capacitor (C5) is connected with the damping resistor (R7) in series; a high-frequency component output from a bridge side of an IGBT is by-passed on a null line through the RC damping branch; the high-frequency filter is characterized in that the RC damping branch is connected with two paths of LC tuning branches respectively composed of a fourth inductor (L4), a seventh capacitor (C7), and a third inductor (L3) and a sixth capacitor (C6) in parallel; the fourth inductor (L4) is connected with the seventh capacitor (C7) in series; and the seventh capacitor (C7) is connected with the third inductor (L3) in series. The high-frequency filter applied to the grid-connected inverter hardly generates losses; due to the value of a resonance resistor R, the damping action of a resonance point position is the strongest; the system has relatively high damping characteristics; and the voltage of the damping resistor can be sampled for an active damping algorithm.

The invention discloses a method for manufacturing a vibration isolator. The method is as below: first dipcoating 5-10 rubber layers on a whisker surface of tetrpod-like zinc oxide; taking 100 parts by weight of plasticated natural rubber; adding 10-15 parts by weight of the tetrpod-like zinc oxide with rubber layers dip-coated on the whisker surface, 3-5 parts by weight of nano zinc oxide, 0.3-0.8 parts by weight of stearic acid, 15-20 parts by weight of spray carbon black, 1-3 parts by weight of an antioxidant N-phenyl-beta-naphthylamine, 2-3 parts by weight of sulfur and 0.3-0.8 part by weight of an accelerator disulfide benzothiazole; mixing evenly; injecting the mixture into a metal mold cavity of a molding machine injection isolator by an injection molding machine; and vulcanizing the mixture at 150-160 DEG C for 15-20 min to obtain the isolator product. The isolator manufactured by the manufacturing method provided by the invention has strong carrying capacity and high damping dissipation energy, good noise reduction and isolation performance and obvious effects.

The invention belongs to the field of architectural structure vibration control, and provides a tension and compression energy dissipation metal damper. A cylinder structure is enclosed by an outer semicircle energy dissipation steel plate and an end energy dissipation steel plate. Initial rigidity is high, material yield dispersion area is large, and recoverable deformation is high. During an earthquake, an upper plate and a lower plate drive the outer semicircle energy dissipation steel plate, the end energy dissipation steel plate and an energy dissipation partition mild steel plate to vibrate. The energy dissipation partition mild steel plate and a round mild steel inner cylinder are in intercoordination to extrude and dissipate energy, and energy dissipation deformation can be conducted by self-curving. During relative displacement, friction between the energy dissipation partition mild steel plate and foamed aluminium energy dissipation materials is conducted to extrude and dissipate energy in a friction mode, and therefore energy such as kinetic energy or elastic potential energy of the structure can convert into thermal energy and dissipate. Spring energy dissipation bodiesand the energy dissipation partition mild steel plate are synergistically stressed to improve energy dissipation capacity of vibration in the tension and compression direction of the damper, and therefore energy dissipation of the damper is fuller, during normal application, overall rigidity of the architectural structure can be increased, and during the earthquake, earthquake reaction of the architectural structure can be reduced.

The invention belongs to the technical field of civil engineering structure vibration control devices and relates to an annular curvature-related shape memory alloy damping device. The device comprises a bracing boom, an inner / outer soft connection shell, an upper / lower cover plate, an SMA bar / rope, a limit node, an adjusting node and a fixing node. The damping device is connected with a self-standing high-rise structure through the upper / lower cover plate and the bracing boom. The SMA bar / rope is connected with the upper / lower cover plate through the adjusting node and the fixing node. The limit node limits the contact of the SMA bar / rope and the self-standing high-rise structure when the SMA bar / rope deforms. The adjusting node adjusts the initial state of the SMA bar / rope and uses the super elasticity of the SMA bar / rope to provide energy consumption and self-reset capability. The annular curvature-related shape memory alloy damping device is simple in structure, good in energy consumption performance and durability, and capable of achieving self-reset, and the like.

The invention relates to a tension-compression type magnetic shape memory alloy multi-mode intelligent damper. The damper is mainly composed of connecting flanges, a core rod, a guide nut, a cylinder barrel, magnetic shape memory units, a guide piston, a spring and a closing nut. The core rod is arranged in the cylinder barrel. The multiple magnetic shape memory units are distributed along the periphery of the core rod. The two ends of the magnetic shape memory units are connected with the guide nut and the guide piston correspondingly. The spring is installed between the guide piston and the closing nut. The connecting flanges arranged at the two ends of the damper are connected with a main body structure. The damper has multiple working states such as passive control, semi-active control and active control, is high in intelligence degree and has the advantages of high response frequency, high damping capacity, automatic resetting, stable performance and the like.

The invention provides a multipurpose damper made of shape memory alloy skew-pulled in a multidimensional space and relates to a vibration control device in the technical fields of building structure and mechanical engineering. The multipurpose damper comprises an outer connecting plate, inner separating plates, inner fixing plates, outer fixing plates, hyperelastic shape memory alloy wires, and the like, wherein the inner fixing plates are respectively arranged in eight adjacent corners of a small cube; the outer fixing plates are respectively arranged at eight corners of a big cube; correspondingly, the hyperelastic shape memory alloy wires are fixed by a locking nut, an adjusting screw and an adjusting nut between the inner and outer fixing plates; eight inner fixing plates and eight outer fixing plates are in skew symmetry; eight inner separating plates and eight sets of hyperelastic shape memory alloy wires are also in skew symmetry; and the hyperelastic shape memory alloy wires are arranged at eight corners and are skew pulled to a central point. The multipurpose damper has a function of automatically resetting along horizontal, vertical and twisting directions and can be used for effectively protecting the building structure when earthquake and wind vibration occur.

The invention belongs to the technical field of plate manufacturing, and relates to a composite wallboard, in particular to a scratch-resistant sound-insulating leather wallboard. The wallboard is technically characterized by sequentially comprising scratch-resistant flexible leather pattern woven fabric, a PVC plate A, a high-molecular sound-isolating felt, a PVC plate B and a mute pad from top to bottom. The preparation method specifically comprises the following operation steps of S1, preparing the scratch-resistant flexible leather woven fabric; S2, preparing the PVC plate A and the PVC plate B; and S3, flatly laying the scratch-resistant flexible leather woven fabric, the PVC plate A, the high-molecular sound-isolating felt, the PVC plate B and the mute pad in sequence and attached the same through PUR glue. The scratch-resistant sound-insulating leather wallboard has the advantages of wear resistance and scratch resistance, meets the requirements of high performance, high quality and excellent transmission loss, achieves the requirements of water resistance, sound insulation, wear resistance, scratch resistance and style diversification, and has the application value.

The invention relates to a no vibration slip limiting ramp construction method, and belongs to the technical field of ramp construction. The method comprises the following steps of 1, basal plane treatment, (1) basal plane solidification, (2) basal plane leveling, (3) polish treatment, 2, basal plane cleaning, 3, damp proof treatment,4, bottom layer treatment, (1) damp proof layer detection, (2) priming layer treating agent, 5, crack treatment, 6, slip limiting layer treatment, 7, coating treatment, 8, finishing coat treatment, 9 maintenance treatment, and 10, caulking treatment. The method adopts driveway slip limiting materials treated specially, and has the advantages of good intensity, high hardness, wear resistance and high press resistance; and the method is simple in technology, the quality of ramp molding is good, nose of vehicle running is effectively reduced, and meanwhile, the requirement of slip limiting is satisfied.

The invention discloses a method for controlling a power system stabilizer on the primary frequency modulation nonlinear speed regulation side of a generator set. According to the method, nonlinear speed limit calculation processing is performed on an output command signal in a primary frequency modulation control circuit of the generator set, and the signal subjected to the calculation processing serves as a new primary frequency modulation control output command signal of the generator set and replaces a control output command in an original primary frequency modulation control circuit of the generator set to carry out primary frequency modulation control. Due to the fact that the nonlinear speed limit calculation processing is performed on the primary frequency modulation control command of the generator set, the method has the advantages of being convenient to implement, simple in parameter setting, strong in robustness and the like.

The invention belongs to the field of vibration control of building structures, in particular to a double cylinder type large-deformation tension and compression damper, comprising an upper plate, a lower plate, an upper plate screw hole, a lower plate screw hole, an external circular energy-consuming steel plate, an internal circular energy-consuming steel plate, a large circular soft steel energy-consuming inner cylinder, a coordinated connection steel bar, an end energy-consuming steel plate, an arc-shaped energy-consuming steel plate, a horizontal energy-consuming partitioning soft steel plate, an aluminum foam energy-consuming material, a lock nut, a small circular soft steel energy-consuming inner cylinder and a large curved energy-consuming steel plate. The damper adopts a double cylinder structure, the external circular energy-consuming steel plate at the outermost side of the damper adopts a circular cylinder structure, the internal circular energy-consuming steel plate at theinnermost side of the damper adopts a circular cylinder structure, and the two cylinders are coaxial. The damper has the beneficial effect of larger initial stiffness, larger material yielding dispersion area and strong damping capacity, and can weaken the seismic response of building structures through structure design of multiple energy energy-consuming in the vertical direction.

The invention discloses a high-performance UV-cured polyacrylate self-foamed damping material, which comprises the following components, by weight part, 20-30 parts of polyacrylate elastomer, 70-75 parts of a reactive diluent, 0.5-0.8 part of a photoinitiator, and 1-5 parts of nanometer hollow inorganic particles. UV polymerization is adopted for preparing the high-performance damping material, and the damping material is completely free of solvent and causes no pollution. Nanometer hollow inorganic particles are taken as an inorganic bulk foaming agent, and through control of the addition amount of the nanometer hollow inorganic particles, the density of the damping material can be accurately controlled according to the requirement, and the loss factor of the damping material can be increased at the same time. The damping material is excellent in initial adhesion, lasing adhesion, peel strength, and interfacial wettability and high in loss factor.

A damping type self-regulating boundary gland seal is suitable for a steam turbine. In order to improve the efficiency of the steam turbine, a fine wire driven by a sliding plate has the two-stage floating function, and under the set boundary condition, the fine wire performs self-regulation from the upper limit of the boundary condition to the lower limit of the boundary condition with the change of the operational states. The gland seal is characterized in that: the cross section of a multi-equant novel gas seal ring is made into a T-tail shape, a board spring is additionally arranged on the back of the multi-equant novel gas seal ring, and the multi-equant novel gas seal ring slips into a T-tail groove arranged on a cylinder body; a high-temperature sheet spring is arranged on the back of the multi-equant sliding plate which is matched with an internal groove of the novel gas seal ring, so that a cavity on the back of the sliding plate is communicated with a feed steam cavity; under the action of the high-temperature sheet spring on the sliding plate, the fine wire driven by the sliding plate is contacted with a rotating shaft; and the equant joint of the sliding plate is evenly provided with a circular groove, a high-temperature spiral spring is arranged in the circular groove, and a labyrinth tooth is made of a ferrite, so that the damping type self-regulating boundary gland seal is formed.

The invention belongs to the field of vibration control of a building structure, in particular to a spindly tension-compression type energy-dissipating damper. The damper comprises an upper plate, a lower plate, a screw hole A, a screw hole B, an external curved energy-dissipating steel plate, a spindly energy-dissipating steel plate, elliptical holes, a coordinated connection steel bar, an energydissipation rib, internal curved energy-dissipating steel plates, a spindly foaming aluminum energy absorbing plate, elastic bonding filling material and lock nuts. The damper is enclosed by the upper plate, the lower plate, the external curved energy-dissipating steel plate and the spindly foaming aluminum energy absorbing plate. The elliptical holes are arranged in the spindly energy-dissipating steel plate. The spindly foaming aluminum energy absorbing plate is arranged at the position, close to the spindly energy-dissipating steel plate internally equipped with the elliptical holes, the interior of the enclosed structure. The structure enclosed by the upper plate, the lower plate, the external curved energy-dissipating steel plate and the spindly foaming aluminum energy absorbing plate is filled with the elastic bonding filling material. When the damper is used in a normal state, the overall rigidity of a building structure is enhanced. In case of an earthquake, earthquake reactions of the building structure are reduced.

The invention belongs to the field of vibration control of a building structure, particularly relates to a multi-directional shock-absorbing buffering multi-order energy-consuming damper. The multi-directional shock-absorbing buffering multi-order energy-consuming damper comprises an upper plate, a lower plate, a screw hole A, a screw hole B, an energy-consuming steel plate A, an energy-consumingsteel plate B, an elliptical hole, a coordinating and connecting steel bar, an energy-consuming rib, a horizontal arc-shaped energy-consuming steel plate, a foaming aluminum energy absorbing plate, afoaming aluminum energy-consuming material, a locking nut, a circular soft steel energy-consuming internal cylinder, a end portion energy-consuming steel plate, a horizontal energy-consuming separating soft steel plate, a vertical energy-consuming separating soft steel plate, an energy-consuming side steel plate and a vertical arc-shaped energy-consuming steel plate. The multi-directional shock-absorbing buffering multi-order energy-consuming damper is of a structure enclosed by the upper plate, the lower plate, the energy-consuming steel plate B and the energy-consuming side steel plate. Thefoaming aluminum energy-consuming plate is arranged at the position, close to the energy-consuming steel plate B, of the inner of the enclosed structure. The multi-directional shock-absorbing buffering multi-order energy-consuming damper has the advantage and beneficial effect that the earthquake response of a building structure is reduced by using the structural design of multi-directional shockabsorption and multi-order energy consumption.

The invention relates to an extrusion type automatic resetting magnetic shape memory alloy damper. The extrusion type automatic resetting magnetic shape memory alloy damper comprises connecting plates, an end sealing plate, a guide plate, a constraint barrel, a control unit, a core guide rod and a guide sealing plate. The connecting plates are connected to the two ends of the constraint barrel. The end sealing plate is arranged at one end of the constraint barrel. The core guide rod is arranged inside the constraint barrel. The guide plate and the guide sealing plate are arranged at the two ends of the core guide rod. The extrusion type automatic resetting magnetic shape memory alloy damper has the advantages of multiple working states, automatic resetting, high response frequency, high damping capacity, stable performance and the like.

The invention provides a barrel type tension-compression damper with built-in semicircular wave energy dissipation separation steel plates, and belongs to the field of vibration control of a buildingstructure. The barrel type tension-compression damper comprises connection plates, connection plate screw holes, fixed end plates, outer barrel side plates, outer barrel end plates, end part energy dissipation steel plates, the semicircular wave energy dissipation separation steel plates, energy dissipation reinforced tension-compression plates, coordinated connection reinforcements, an elastic binding filling material, tension-compression connectors, a foamed aluminium energy dissipation material, spring energy dissipation bodies and outer barrel cover boards; a main body of the barrel type tension-compression damper with the built-in semicircular wave energy dissipation separation steel plates is of a structure formed by the surrounding of the outer barrel side plates, the outer barrel end plates and the outer barrel cover boards. The barrel type tension-compression damper with the built-in semicircular wave energy dissipation separation steel plates has the advantages that by adopting a structural design that for two rows of semicircular wave energy dissipation separation steel plates, wave crests and wave crests are opposite, wave troughs and wave troughs are opposite, the wavetroughs are connected by the spring energy dissipation bodies and the wave crests are connected by the coordinated connection reinforcements, mutual coordination can be implemented, coordinated energy dissipation capacity of the barrel type tension-compression damper is improved, and an earthquake response of the building structure can be reduced.

The invention relates to the field of road skid resistance and in particular to an underground garage anti-skid ramp composite system and a construction process. The invention provides an undergroundgarage anti-skid ramp composite system on the first hand. The underground garage anti-skid ramp composite system comprises a base surface closing layer, a pressure-resistant structure layer, an anti-skid damping layer and a self-cleaning protection layer. The pressure-resistant structure layer is prepared from the following raw materials in parts by weight: 30-45 parts of cement, 45-60 parts of graded sandstone, 5-8 parts of nano silicon dioxide, 2.5-4.5 parts of redispersible latex powder, 0.5-2 parts of a water-retaining agent and 0.5-3 parts of a water repellent. The underground garage anti-skid ramp composite system provided by the invention can reduce friction noise between vehicle tires and a ramp, reduces damage of the ramp to the vehicle tires, and is high in damping performance, comfortable in driving feeling and low in fluctuation. The colorful shading and the anti-skidding damping layer are attractive, have the warning and decelerating effects on a driver, and have the overproof characteristics of being high in weather resistance, self-cleaning, resistant to heavy pressure, resistant to abrasion, short in construction period and the like.

The invention relates to a high-temperature-resistant UV polymericbulk foam damping material and a preparation method thereof. The preparation comprises the following steps: adding POSS, an acrylate copolymer, a reactive diluent and a photoinitiator into a reaction kettle, and performing stirring for swelling to form a uniform UV polymeric bulk foam damping material composition; and uniformly coating a release PET film by the obtained damping material composition, and performing illumination under ultraviolet light for 3-6 min to obtain the UV polymeric bulk foam damping material. The dampingmaterial provided by the invention has the following beneficial effects: 1, POSS is used as an inorganic bulk foaming agent, an addition amount of the POSS particles is controlled, so that the productdensity can be precisely controlled according to requirements, and the loss factor of the material can be improved; and the POSS can form stable nano-scale dispersion without any treatment in the material system; and 2, the process flow is simple, the reaction speed is fast, the production efficiency is high, and the costs are reduced.

The invention discloses a sound-insulation and anti-fouling wallpaper. The sound-insulation and anti-fouling wallpaper is prepared from, by weight, 20-24 parts of white glues, 23-25 parts of rosin, 120-140 parts of paper pulp, 10-16 parts of a mould-proof agent, 10-14 parts of an anti-fouling agent and 1-3 parts of an interfacial modifier in a mixed mode; a fungus-proof agent is prepared from, by weight, 20-30 parts of pomegranate peels, 11-15 parts of whole herbs of corydalis bungeana and 8-13 parts of asparagus officinalis; the anti-fouling agent is prepared from, by weight, 12-16 parts of hexamethyldisilane, 2-4 parts of polysiloxane and 6-8 parts of sodium borate; the interfacial modifier is prepared from castor oil. The sound-insulation and anti-fouling wallpaper is simple in preparing technology, the raw materials are easy to obtain, the cost is low, the sound-insulation, anti-fouling and anti-mildew properties are good, and the service life of the wallpaper is greatly prolonged.

The invention belongs to the field of building structure vibration control and particularly relates to a barrel type tension and compression damper. The barrel type tension and compression damper comprises an upper plate, a lower plate, screw holes A, screw holes B, outer arc-shaped energy-consumption steel plates, end plates, locking nuts, a coordination connection reinforcing steel bar, a circular soft steel energy-consumption inner cylinder, inner arc-shaped energy-consumption steel plates, a foamed aluminum energy-consumption material and an elastic adhesive filling material. The barrel type tension and compression damper is a structured formed by the upper plate, the lower plate, the outer arc-shaped energy-consumption steel plates and the end plates in an enclosed manner, the inner arc-shaped energy-consumption steel plates are arranged inside the formed structure in a left-right symmetry manner, the bending radius of the inner arc-shaped energy-consumption steel plates graduallydecreases from the middle to two sides, and the circular soft steel energy-consumption inner cylinder is arranged between the innermost arc-shaped energy-consumption steel plates. The barrel type tension and compression damper can increase the overall rigidity of a building structure when being used in a normal state and can reduce the seismic response of the building structure during an earthquake.

The invention relates to the field of power distribution automation, and particularly discloses a topology applied to a flexible direct-current comprehensive voltage regulation device for suppressing common-mode interference. The topology comprises six-phase common-mode inductors 1 and 2, 4P alternating-current circuit breakers 1 and 2, a rectifier module, an inverter module, direct-current circuit breakers 1 and 2, inductor modules 1 and 2, a three-phase four-wire alternating-current power grid and positive and negative direct-current lines. The problem of common-mode interference suppression of the flexible direct-current comprehensive voltage regulation device is solved, common-mode interference signals are isolated while the voltage of the power grid is regulated, and the purpose of regulating the quality of electric energy is achieved.

The invention provides a multi-stage energy dissipating device for a building structure joint and belongs to the field of building structure vibration control. The multi-stage energy dissipating device comprises a first-stage energy dissipating rib, a nail penetrating hole, a second-stage energy dissipating oval hole, a second-stage energy dissipating rib, a sliding extrusion end, a fixed end, a middle inner track plate, a connecting end and a middle inner hook plate. A first connecting plate is provided with a plurality of first installing holes. A second connecting plate is provided with a plurality of second installing holes. A right-angle joint shock absorbing inner combination system, a right-angle joint shock absorbing middle inner combination system, a right-angle joint shock absorbing middle outer combination system, a right-angle joint shock absorbing outer combination system and a shock absorbing medium interlayer are arranged between the first connecting plate and the secondconnecting plate. The multi-stage energy dissipating device has the beneficial effects that it is ensured that a joint has sufficient rigidity, the characteristic that shock absorbing and energy dissipating abilities of a traditional building structure right-angle joint are poor is changed, the characteristics of high damping ability, good anti-fatigue performance, low maintenance expense and high shock absorbing ability are achieved, the shock absorbing performance is improved, the building earthquake response can be controlled effectively, and the manufacturing cost is low.