101results about How to "Effective dissipation" patented technology

The invention relates to a shape memory alloy web friction self-reset steel frame joint.The joint is composed of a column, a bracket, beams, shape memory alloy stay rope units, tensioning nuts, fixing nuts, arc hole high-strength bolts and central high-strength bolts.The bracket is welded to the side, close to the beams, of the column, a double-web mode is adopted for the bracket, and the bracket is connected with beam webs through the high-strength bolts.Arc holes are formed in the parts, at the arc hole high-strength bolts, of double webs of the bracket, the contact faces of the beam webs and the double webs of the bracket are subjected to friction treatment, friction parameters are adjusted with prestress of the high-strength bolts, the upper portions and the lower portions of the beams are connected with the column through the shape memory alloy stay rope units respectively, and the initial states of shape memory alloy stay ropes are controlled by adjusting the tensioning nuts and the fixing nuts.The shape memory alloy web friction self-reset steel frame joint has the advantages of being simple in structure, high in practicability, definite in stress, high in energy dissipation, capable of achieving self-resetting and the like.

The invention discloses a shape memory alloy composite flange friction steel structure beam column splicing joint.The joint is composed of a column, a bracket, a beam, a web plate bolt, a web plate splicing plate, a shape memory alloy wire, a flange splicing plate and double nuts and bolts, wherein the bracket stretches from the column in the direction of the beam, a web plate of the bracket and a web plate of the beam are spliced through a high-strength bolt, a flange of the bracket and a flange of the beam are spliced through the double nuts and bolts, and the shape memory alloy wire is wound between the double nuts and bolts.According to the joint, energy-dissipating capacity is provided through friction damping in a small earthquake, energy-dissipating capacity is provided through friction damping and superelasticity damping together in a major earthquake, the joint can recover to the original state after the earthquake, and the joint has the advantages of being simple in structure, high in practicality, definite in stress, high in energy dissipation, capable of achieving self-restoration and the like.

The invention discloses a measuring and calculating method for the length of a deep pool segment of a step-deep pool type debris flow drainage canal. According to the measuring and calculating method, firstly, the unit weight of a debris flow body, the designed longitudinal slope of the drainage canal, the casting angle of debris flow, the designed suspension height of a step segment, the designed width of the drainage canal and the designed peak flow of the drainage canal are determined; then the roughness factor of the drainage canal, the permissible velocity and the overflowing mud depth of the debris flow are determined; afterwards, the average velocity of a debris flow cross section is determined, and the permissible velocity is compared with the average velocity of the debris flow cross section; and finally, the length of the deep pool segment of the step-deep pool type debris flow drainage canal is determined through a measuring and calculating formula of the deep pool segment. Proceeding from the complete movement process of fluid in the canal, the method is based on strict theoretical derivation, and the influence of the properties of the debris flow on the casting range is considered in combination with experiments, so that the length of the deep pool segment of the step-deep pool type debris flow drainage canal is determined reasonably, and a basis is provided for the design of the step-deep pool type drainage canal; the precision of a calculated result is high; the method is adapted to the actual requirement of engineering.

The invention discloses a preparation method of a high-strength and high-adhesion branched starch composite polyacrylamide/ polyvinyl alcohol hydrogel with a strong hydrogen bonding effect, the methodcomprises the following steps: branched starch, polyvinyl alcohol, polymer monomer acrylamide and a photoinitiator are dissolved to obtain a uniform mixed solution, firstly, the uniform mixed solution is initiated under the condition of ultraviolet light, so that the acrylamide is polymerized, micro-crystals are formed in a polyvinyl alcohol network in the freezing and unfreezing process, a multi-hydrogen bond interaction can be formed between molecular chains of the branched starch and molecular chains of the polyacrylamide and molecular chains of the polyvinyl alcohol, and under the doubleactions of multiple hydrogen bonds and the micro-crystals, multi-physical-bond cooperative cross-linking is realized. The preparation process is simple and convenient to operate, and the prepared hydrogel has relatively high mechanical strength and excellent adhesion property on the surface of glass, and can be used as a preferred material of a soft robot.

The invention discloses a physical phase-split dynamic polymer. The physically phase-splitting dynamic polymer contains dynamic polymer molecules including hard segments and soft segments at the sametime. The hard segments of the dynamic polymer molecules are mixed with each other and/or independent to form crystal phases and/or phases incompatible with the soft segments, so phase-split physicalcross-linking or cross-linking and polymerization based on the hard segments is formed; the soft segments of the dynamic polymer molecules are amorphous; the dynamic polymer molecules contain at leastone boron-containing dynamic covalent bond and an optional hydrogen bond group; and the boron-containing dynamic covalent bond and the optional hydrogen bond group provide dynamic reversibility, so the physical phase-split dynamic polymer has good toughness, energy dissipation performance, self repair performance and other performance. The physical phase-split dynamic polymer is extensively applicable to the body protection of people during exercises, daily life and working, the body protection of the military police, explosion prevention, protection in airborne landing and aerial delivery, collision prevention of automobiles, anti-impact protection of electronic materials, self-repairing sealing members, sealants, tough elastomers, etc.

The invention discloses a self-reset energy dissipation device which comprises self-reset energy dissipation mechanisms symmetrically arranged on a structure frame. Each self-reset energy dissipationmechanism comprises a fixed pulley, a plurality of steel ropes, a friction energy dissipation component and a self-reset component. The two self-reset energy dissipation mechanisms bear interlayer displacement in opposite directions of the structure frame; under the effect of an earthquake, the friction energy dissipation component can not only bear most of horizontal shear force, but also effectively dissipate earthquake energy to achieve the energy dissipation and shock absorption effects. Under the counteractive force of the self-reset component, the friction energy dissipation component resets; prestress does not need to be applied, and therefore the operation process is simplified.

The invention relates to a method for producing a semiconductor packaging part, adopting a plurality of substrates and a bearing part provided with multiple openings, wherein flip-chip semiconductor chips and radiating pieces are sequentially arranged on each substrate, the size of each substrate is approximately equal to the predetermined size of a packaging part, and the size of each radiating piece is smaller than the size of each substrate so as to position the substrates in the openings of the bearing part; then packaging colloids used for covering the chips and the radiating pieces are formed on the openings, wherein areas covered by the packaging colloids are larger than the size of the openings, the step of demoulding is carried out, and laser is utilized for eliminating the packaging colloids which cover the radiating pieces; the operation of cutting is carried out along the edges of the substrates to produce a plurality of semiconductor packaging parts, thereby enabling the packaging colloids to directly cover the inverted chip type semiconductor chips and the radiating pieces; and besides, the laser is utilized for eliminating the packaging colloids on the upper parts of the radiating pieces so as to effectively disperse the heat amount of the chips, to prevent the problem of chip damage caused by the packaging colloid elimination by the existing mode of mechanical abrasion or chemical etching, and to reduce the problem of abrasion of a cutting tool which passes through the radiating pieces.

A first resin, a curable precursor of a second resin that differs from the first resin, an inorganic material and a solvent are blended and a mixed solution is prepared. Next, by heating the mixed solution, the solvent is removed and the curable precursor is cured, and an organic-inorganic composite is obtained that comprises a composite resin having a co-continuous phase-separated structure formed from a three-dimensionally continuous first phase made of the first resin and a three-dimensionally continuous second phase made of the second resin, and an inorganic material that is localized at the interface between the first phase and the second phase.

A bidirectional vibration absorption type rear suspension device of a driving cab of an automobile comprises a left mechanism and a right mechanism. The left mechanism and the right mechanism are bilaterally symmetric, structures of the left mechanism and the right mechanism are consistent, the left mechanism is connected with the right mechanism by oil tubes and a crossbeam, both the left mechanism and the right mechanism consist of upper connecting supports, middle connecting plates and lower connecting supports, upper portions of the upper connecting supports are fixedly connected with thedriving cab, lower portions of the upper connecting supports are movably connected with hydraulic locks, lower portions of the hydraulic locks are fixedly connected with the middle connecting plates by top connecting holes, side connecting holes on the middle connecting plates are hinged with transverse vibration absorbers, the other end of each transverse vibration absorber is hinged with the corresponding lower connecting support, and the oil tubes are connected onto the hydraulic locks. The lateral buffering performance of the bidirectional vibration absorption type rear suspension device is better, movement discordance can be avoided, and smoothness, safety and comfortableness of the driving cab can be improved.

The invention discloses a strong shock-absorption type rear suspension device of an automobile cab. The strong vibration-attenuation type rear suspension device comprises a left mechanism and a right mechanism, wherein the left mechanism and the right mechanism are in bilateral symmetry and have the consistent structure; the left mechanism is connected with the right mechanism by an oil tube and a beam; in the left mechanism and the right mechanism, the lower part of an upper connecting bracket is movably connected with a support trench on a hydraulic lock by a middle shaft; the lower part of the hydraulic lock is fixedly connected with the upper end of a middle connecting bracket; a side end of the middle connecting bracket is connected with a lateral shock absorber; the bottom end of the middle connecting bracket is in threaded connection with a spring shock absorber; the lower part of the spring shock absorber is connected with the middle part of the lower connecting bracket; the top of the lower connecting bracket is connected with a front beam and a back beam; and the front beam and the back beam are respectively connected with the lateral shock absorber by front and back beam connecting plates. The strong shock-absorption type rear suspension device has good lateral buffer performance, does not cause reciprocating sidesway of the cab, improves driving safety, can avoid motion discordance with the vertical motion of the cab, has strong guidance action for parts, and can effectively prevent the parts from sliding.

The invention discloses an antistatic spray-free polypropylene composite material with low linear thermal expansion coefficient and a preparation method of the antistatic spray-free polypropylene composite material. The antistatic spray-free polypropylene composite material is prepared by mixing and extruding polypropylene, mineral filling, a toughening agent, a functional assistant, a metal pigment, a coupling agent, an antioxidant, a lubricant and a light stabilizer. The functional assistant is prepared by compounding wollastonite whisker and glyceryl monostearyl ester according to the mixing mass ratio of 1:1 to 4:1. According to the antistatic spray-free polypropylene composite material, the polypropylene is compounded with the mineral filling and the toughening agent, the strength, rigidity and toughness of the composite material are ensured, in addition, the crystallization velocity is shortened and the degree of crystallization of the material is increased by adding the functional assistant, the post shrinkage of the product is lowered, the forming period of the product is shortened, meanwhile a conductive network is formed in the material, the material has a certain conductive performance, the surface antistatic property of the material is improved, and thus the modified polypropylene composite material can be widely used in spray-free products.

The invention discloses a Tokamak plasma disruption energy processing device and processing method. The Tokamak plasma disruption energy processing device comprises a voltage dependent resistor, a pulse capacitor unit, a resistance unit, an invert unit and a control unit; the voltage dependent resistor, the pulse capacitor unit and the resistance unit are parallelly connected in sequence between the positive pole and the negative pole of a direct current bus, and the positive pole and the negative pole of the pulse capacitor unit and the positive pole and the negative pole of the direct current bus are correspondingly connected; the positive pole of an input end of a direct current side of the invert unit is connected with the positive pole of the direct current bus, and the negative pole of the input end of the direct current side of the invert unit is connected with the negative pole of the direct current bus. The Tokamak plasma disruption energy processing device and processing method are mainly applied to the controllable nuclear fusion Tokamak plasma disruption energy processing, a multiprocessing function of processing energy storage, energy absorption, energy consumption and energy feedback recycle is achieved, the plasma disruption energy transmitted by a plasma coupled coil can be effectively absorbed and processed, and the Tokamak plasma disruption protection and the energy recycling are achieved.

The related flip-chip sheet package structure on a film comprises: a flexible base, a flip-chip sheet fixed on top surface of the base and electric connected with the base, and a first thermal fin on the bottom surface o base fit to release heat and increase structure strength.

The present invention discloses polymer foam particles with skin and dilatancy and a preparation method thereof. The polymer foam particles with the skin and the dilatancy have skin structures and thedilatancy, wherein the dilatancy is realized by at least one mechanism in vitrification dilatancy, dynamic dilatancy, entanglement dilatancy, dispersion dilatancy and pneumatic dilatancy. The polymerfoam particles with the skin and the dilatancy can be used for producing package materials with the dilatancy and the slow rebound properties, anti-impact protective materials, damping materials, buffer materials, sound-absorbent materials, thermal insulation materials and the like, so that the polymer foam particles are widely applied.

The invention discloses a novel high-level waste deep geological disposal buffer material. Clay, a microbial solution taking peanut shell powder as a carrier and consolidation liquid are stirred together; the microbial solution is a bacterial solution obtained by mixing bacillus sphaericus, sporosarcina pasteurii, bacillus megatherium, bacillus lentus, bacillus pasteurii and the like, and the consolidation liquid is a mixed solution obtained by mixing calcium chloride or calcium nitrate and urea. The invention further discloses a construction method utilizing the buffer material. The method includes the steps that a disposal repository is selected, a partition plate is installed at the bottom of the disposal repository, porous stone is put on the partition plate, a layer of clay is laid onthe porous stone, a high-level waste tank is placed on the clay, the disposal repository is backfilled with the clay, a waste liquid recycling tank and a gas cylinder are opened, the microbial solution and the consolidation liquid are introduced, the clay on the surface of the disposal repository is rolled for covering, and the surface of reinforced clay is flat and smooth. Accordingly, the thermal conductivity, plasticity and long-term stability are very good, and the safety of high-level waste disposal is effectively guaranteed.

The invention belongs to the field of automobile foam damping materials and especially relates to a graphene composite foam damping material used for automobiles and a preparation method of same. The foam damping material is composed of ethylene-vinyl acetate resin (EVA), maleic anhydride grafted EVA (EVA-g-MA), a foamer, functionalized graphene, fumed silica, a foamer accelerant, a peroxidation crosslinker and a plasticizer. The damping peak value of the foam damping material is increased, so that the damping performance of the material is greatly improved.

The invention belongs to the technical field of vibration isolation devices and particularly relates to a droplet spring vibration isolation device. The droplet spring vibration isolation device comprises a liquid storage device, a liquid conveying device, a backflow device and an atomizing device. The liquid storage device is provided with a liquid cavity and a moving cavity. A movable vibratingdevice is arranged in the moving cavity. The vibrating device is of a hollow structure. The atomizing device communicates with the inner portion of the vibrating device. The atomizing device communicates with the liquid storage device through the liquid conveying device. Movement displacement of the vibrating device can provide power to the liquid conveying device. The liquid conveying device feeds the liquid in the liquid cavity into the vibrating device through the atomizing device. The vibrating device communicates with the liquid storage device through the backflow device. The movement displacement of the vibrating device can provide power for the backflow device, the liquid in the vibrating device is made to return into the liquid cavity through the backflow device, and circulation ofthe liquid is achieved. The vibration energy is converted into droplet deformation energy, interface energy and collision energy, so that energy dissipation is achieved, and the purposes of bufferingand vibration isolation are achieved.

The invention provides a high-temperature-resistant sealing device for a lead. The devvice comprises a lead, a steel sleeve, an isolator, a mica insulating cover and a vacuum tube, wherein the interior of the steel sleeve is vacuum, and a vacuum pipe is arranged below a pipe body; mica insulating covers for sealing are arranged at the two ends of the steel sleeve. The power supply lead penetratesthrough the mica insulation cover and the steel sleeve, the steel sleeve penetrates through the isolator, the isolator divides the steel sleeve into two sides, one half of the steel sleeve is locatedon the normal temperature side, the other half of the steel sleeve is located on the high temperature side, and a high temperature insulation plug is arranged at one end of the high temperature side of the steel sleeve and at the position where the lead penetrates through the mica insulation cover. The device adopts an insulating sealed structure provided with an insulating sleeve when the lead isconnected with the heat accumulator, and can stably work in a high-temperature environment.