210 results about "Viscoelasticity" patented technology

The invention discloses a dynamic optimization method and device for an automatic fiber placement path of a composite material and a medium, and belongs to the technical field of automatic fiber placement of composite materials. The method comprises the steps that a three-dimensional model of a component to be laid is obtained, and curved surface curvature distribution characteristics and fiber laying angle constraints are obtained based on the three-dimensional model; processing the curved surface curvature distribution characteristics based on a path planning algorithm to generate an initial fiber placement path; on the basis of the tension mapping table and the temperature compensation coefficient, the fiber placement head is driven to execute reverse pre-tension control; acquiring actual fiber trend data according to a preset sampling period based on a polarization laser polarization instrument, and extracting a fiber angle deviation of the actual fiber trend data; processing the fiber angle deviation and the resin viscoelasticity data based on a Bayesian optimization algorithm so as to dynamically correct the laying path and generate an updating instruction; and adjusting the spatial pose and tension of the fiber placement head according to the updating instruction. Based on the method, dynamic multi-target fiber placement path optimization and real-time feedback control are realized.

The invention relates to the technical field of route planning, in particular to an underground cavern inspection method and system. The method comprises the following steps: acquiring geological survey data, micro-seismic monitoring data and historical deformation monitoring data; according to the geological survey data and the micro-seismic monitoring data, rock mass viscoelasticity local modeling is carried out, and a rock mass viscoelasticity model is obtained; performing deformation trend prediction according to the rock mass viscoelastic model and the historical deformation monitoring data to obtain deformation trend data; performing deformation disturbance resonance analysis according to the deformation trend data and the micro-seismic monitoring data to obtain deformation disturbance resonance data; performing risk area grading on the deformation disturbance resonance data to obtain risk area grading data; and generating a routing inspection graph according to the risk area grading data to obtain routing inspection graph data so as to carry out underground cavern routing inspection auxiliary operation. The method accurately identifies the potential risk area, dynamically plans the inspection task, and improves the inspection efficiency and decision timeliness.

The invention relates to the technical field of medical elastography and material multi-scale mechanical measurement, in particular to an elastography method and system based on an instantaneous scattering displacement field, and the method comprises the steps: driving a passive / active method scattering displacement field excitation device through a frequency domain controllable sine wave signal, and generating a scattering displacement field on a target material, an instantaneous displacement field is obtained through high spatial resolution measurement, then sliding window local interception, two-dimensional autocorrelation calculation and nonlinear fitting based on the Rayleigh / shear wave spatial autocorrelation theory are performed on the single-frame instantaneous displacement field, shear wave velocity distribution is obtained, and then the viscoelasticity modulus of a target area is inverted to achieve comprehensive characterization of the viscoelasticity of the material. According to the scheme, the single-frame scattering displacement field is excited and collected, and the elasticity inversion is performed based on the instantaneous displacement field, so that the dependence of traditional elasticity imaging on high-frame-rate equipment is broken through, the material viscoelasticity evaluation can be efficiently completed at low cost, and the application prospect in the fields of clinical diagnosis and mechanical measurement is wide.

The invention relates to the technical field of computers, and discloses a rock creep model construction method and device and a rock failure mode determination method. The method comprises the steps of obtaining a data set; samples in the data set comprise input data and output data, the input data comprise creep load holding time, sample rock stress data, initial macroscopic damage data, initial microscopic damage data, long-term strength and a creep starting threshold value, and the output data is a strain true value; fitting the initial rock creep model by using the data set to obtain a final rock creep model; wherein the initial rock creep model comprises at least one of a damaged elastomer strain item, a damaged viscoelastomer strain item and a damaged viscoplastic body strain item; each strain item comprises a macro-micro nonlinear coupling damage item, and the macro-micro nonlinear coupling damage item is generated based on the initial micro damage data and the initial macro damage data. The model constructed by the method can truly reflect the nonlinear mechanical response of the rock mass under the combined action of the multi-scale initial defects.

The invention discloses a non-linear vibration detection device for a high-speed rotating viscoelastic plate, and belongs to the field of detection equipment, the non-linear vibration detection device comprises a supporting seat, an anti-vibration pad is fixedly connected to the outer surface of the upper end of the supporting seat, a supporting plate is fixedly connected to the outer surface of the upper end of the anti-vibration pad, and a control component is arranged on the upper side of the supporting seat. The control component comprises a connecting plate fixedly connected with the inner surface of the supporting plate, an adjusting rod is in threaded connection with the middle of the outer surface of the connecting plate, and a through groove is formed in the upper side of the outer surface of the adjusting rod. By arranging the control component, enabling the viscoelastic plate to rotate at the same speed and detecting and analyzing the nonlinear vibration parameters of the viscoelastic plate, an experimenter can conveniently carry out a control experiment, so that the influence of motor vibration on the vibration parameters of the viscoelastic plate can be better analyzed; and the vibration characteristics of the viscoelastic plate can be further compared, analyzed and researched, so that the detection error can be reduced to a certain extent.

The invention provides a touch force feedback simulation method and system based on a pressure deformation signal, and relates to the technical field of touch interaction and tactile feedback, and the method comprises a data collection process: configuring a sensor to collect the physical state of a touch interface, and obtaining an instantaneous pressure and deformation signal; the impedance compensation process comprises the following steps: step 1, acquiring an instantaneous signal; 2, constructing a dynamic hysteresis loop model; step 3, calculating a viscosity energy loss value; 4, generating an energy compensation waveform; 5, an actuator is driven to generate reverse damping vibration; according to the method, the material viscosity loss is quantified through the physical phase space model, reverse energy is accurately injected, and the problems of touch hysteresis and soft collapse caused by viscoelasticity of a touch interface are effectively solved.

The invention relates to the field of building materials, and discloses high-toughness and high-energy-absorption polymer emulsion modified mortar and a preparation method thereof, and the mortar is composed of ordinary Portland cement, river sand, a polymer emulsion, water, an active admixture and chopped fibers. Wherein the polymer emulsion is selected from styrene-acrylic emulsion (SBR), ethylene-vinyl acetate (EVA), polyurethane emulsion or a combination thereof; the mixing amount is 5-20wt% of the mass of the cementing material. According to the invention, a viscoelastic network is formed in a cement matrix through the polymer emulsion, and the synergistic effect of the active admixture and the chopped fibers is combined, so that the bonding strength, the crack resistance, the impact resistance and the stress wave dissipation capability of the mortar are remarkably improved. Test results show that the mortar provided by the invention is obviously superior to ordinary mortar in the aspects of 28d breaking strength, impact toughness and stress wave attenuation performance, and is suitable for high-performance constructional engineering and protective engineering.

The utility model relates to an enlarged type metal composite viscoelastic damper. The bottom of a metal damper is fixedly connected with an enlarged type viscoelastic damper. The metal damper comprises a T-shaped core plate, L-shaped restraining plates are fixedly connected to the two opposite sides of the T-shaped core plate in the vertical direction, friction areas are arranged between the tops, located on the vertical plane, of the L-shaped restraining plates and the T-shaped core plate, fixing areas are arranged between the bottoms of the L-shaped restraining plates and the T-shaped core plate, and energy dissipation webs are arranged on the portions, between the fixing areas and the friction areas, of the T-shaped core plate. The amplified viscoelastic damper comprises an upper connecting plate, an amplifying lever is hinged to the lower portion of the upper connecting plate, an inner steel plate is hinged to the lower portion of the amplifying lever, the inner steel plate is connected with an outer steel plate through a viscoelastic layer, and the outer steel plate is hinged to the amplifying lever through a fulcrum shaft. The defects of a metal damper can be overcome under small earthquakes, good energy consumption is achieved, the amplifying damper can be protected against excessive displacement and failure under large earthquakes, the damper consumes energy in a multi-stage mode, and the anti-seismic performance of the structure is improved. The components are connected through bolts, are highly assembled and are convenient to replace.

The invention relates to the technical field of general control or regulation systems, and discloses a stirring torque self-adaptive cooperative control method for rheological characteristics of high-solid-content slurry, and the method comprises the steps: obtaining a feedback rotating speed signal and a torque current signal, and resolving the real-time angular momentum of a stirring system; extracting a phase deviation angle of the torque current signal relative to the feedback rotating speed signal to calculate a viscoelasticity characterization value, and correcting a virtual damping parameter of a speed control ring according to the viscoelasticity characterization value; a control error phase track is constructed in a phase plane of the controller, and the local curvature of the control error phase track is monitored, so that the rheological property sudden change state of the high-solid-content slurry is judged; according to the method, control instability caused by non-Newtonian fluid viscoelasticity lag is eliminated through phase domain closed-loop adjustment and phase trajectory singular point pre-judgment, and the operation stability of a driving motor under the extremely high damping working condition is guaranteed.

The invention discloses a functionally gradient perfluoroether rubber material as well as a preparation method and application thereof. The functional gradient perfluoroether rubber material comprises a contact layer, a transition layer and a supporting layer which are tightly connected in sequence, wherein the contact layer is prepared from raw materials including raw perfluoroether rubber, a filling agent, a vulcanizing agent and a plasticizer; the transition layer is prepared from raw materials including raw perfluoroether rubber, a filling agent and a vulcanizing agent; the supporting layer is prepared from raw materials including raw perfluoroether rubber, a filling agent and a vulcanizing agent; the Shore A hardness of the contact layer is smaller than or equal to the Shore A hardness of the transition layer and smaller than or equal to the Shore A hardness of the supporting layer. Through component gradient design and process regulation and control, continuous gradient distribution of mechanical properties such as hardness and viscoelasticity of the material in space is realized, so that the problem of contradiction between the sealing performance of the elastic membrane of the medical micro-flow electromagnetic valve and the pipetting precision is solved.

This invention belongs to the field of data processing technology, specifically relating to a method and system for generating maintenance strategies for bridge collision avoidance facilities based on knowledge graphs. The method includes: constructing a physical topology map of the collision avoidance facilities, obtaining the stiffness weights of connecting edges and initializing node parameters; collecting strain and stress data sequences of the collision avoidance units, and calculating the rheological damage index of the collision avoidance units using a dynamic time warping algorithm; constructing a force transmission probability matrix, and obtaining the comprehensive structural risk value of the collision avoidance units through iterative calculation; and calculating the maintenance urgency index by combining the position weight coefficients and service duration of the collision avoidance units to generate a dynamic maintenance strategy. This invention, by constructing a physical topology map reflecting the physical connection relationships between collision avoidance units, and combining the calculation of hysteresis energy consumption and stress transmission deduction of viscoelastic materials, can accurately identify latent transmitted damage and assess the degree of material rheological aging, thus achieving intelligent maintenance of bridge collision avoidance facilities.

The invention discloses a method for testing the fatigue healing performance of graphene / rubber composite modified asphalt. The method comprises the following steps: 1, preparing a graphene / rubber composite modified asphalt material; 2, carrying out a continuous LAS test and drawing a damage characteristic curve; 3, drawing a stress-strain curve graph, and calculating a damage variable and a strain value corresponding to a fatigue damage point; 4, carrying out a standard LAS test for the first time; and 5, carrying out a second standard LAS test on the graphene / rubber composite modified asphalt after standing to obtain the influence trend of the temperature on the graphene / rubber composite modified asphalt. According to the method, the fatigue damage tolerance of the graphene / rubber composite modified asphalt is evaluated through LASH, the fatigue damage recovery degree of the asphalt under the specific relaxation unloading condition is explored, then the self-healing performance of the asphalt is quantitatively evaluated, and the method eliminates the influence of the viscoelastic property of the material on the fatigue performance based on the elastic-viscoelastic correspondence criterion of pseudo strain.

The invention belongs to the technical field of restrained braces, and particularly relates to a viscoelastic double-step all-steel buckling restrained brace which comprises an outer sleeve, two viscoelastic devices, a core plate and a limiting structure, the outer sleeve, the two viscoelastic devices and the core plate are arranged, and the two viscoelastic devices are embedded in the inner side and the outer side of the two ends of the outer sleeve respectively; the viscoelastic material can absorb and dissipate energy generated by earthquakes or wind loads through shear deformation, the vibration response of a structure body is effectively reduced, the anti-seismic performance of a building is improved, the core plate movably penetrates through the viscoelastic device and is arranged in the outer sleeve, the core plate is preliminarily restrained through the outer sleeve, and the anti-seismic performance of the building is improved. According to the limiting structure, the side plates and the multiple limiting plates are matched to limit the core plate, lateral displacement of the core plate can be limited, bending instability of the core plate in the stress process is prevented, it is ensured that the core plate is mainly subjected to axial deformation all the time, and the anti-seismic property of the viscoelastic device is fully exerted.

The invention provides a parallel rheological framework constitutive model parameter calibration method for high-density polyethylene, and the method comprises the steps: obtaining the stress-strain data of a relaxation and rebound test, picking the stress-strain data at the relaxation end moment and the rebound completion moment, and then stripping time-independent elasticoplastic deformation behaviors, thereby achieving the calibration of the parameters of the parallel rheological framework constitutive model. Determining elastic-plastic parameters of the constitutive model of the parallel rheological framework; then, combining curve fitting of axial tension data and elasticoplastic deformation data to ensure that parameters of an elasticoplastic layer of the parallel rheological frame can be really matched with time-independent mechanical characteristics of a sample piece to be tested; and then loop optimization is carried out on viscoelastic layer parameters by using a second-generation non-dominated sorting genetic algorithm, and a simulation result is quantitatively judged through an equivalent root-mean-square error, so that the suitability of the parameters in stress relaxation and creep scenes is ensured, and finally, efficient and accurate calibration of the constitutive model parameters is realized.

The invention relates to a viscoelasticity measuring device, a viscoelasticity measuring method, and a computer-readable recording medium. The viscoelasticity measurement method may include: collecting viscoelasticity characteristic data including a loss modulus and a storage modulus measured by applying shear strain to an active material slurry for a secondary battery at preset intervals; calculating a loss factor defined as a ratio between the storage modulus and the loss modulus, and calculating a difference between a current loss factor and a previous loss factor as a loss factor differential; generating time series data based on the loss factor differential; performing a sliding window analysis on the time series data to calculate an average value of a plurality of loss factor differentiations included in each window; and deriving, as a damping factor, any one average value among the results of calculating the average values of the plurality of loss factor differentiations included in each window.

The application belongs to the technical field of adhesives, and particularly relates to a rubber type removable pressure sensitive adhesive and a preparation method thereof. The application provides a rubber type removable pressure sensitive adhesive, and preparation raw materials include, by weight, 100 parts of styrene-isoprene-styrene block copolymer, 100-150 parts of tackifying resin, 30-70 parts of softening agent, 0.2-1.5 parts of main antioxidant and 0.2-1.5 parts of auxiliary antioxidant. The unique formula design of the application enables the adhesive to have excellent instantaneous adhesion and sufficient cohesion. The pressure sensitive adhesive of the application benefits from balanced viscoelasticity, and the adhesive can be separated in a clean interface during peeling, without any residue on the surface of the adherend (such as glass, ceramic tile and wooden paint surface) and without damaging the base material. By using hydrogenated resin and a composite antioxidant system, oxidative degradation is fundamentally inhibited, the product is not prone to yellowing, brittle and oiling during long-term use, and has a long service life.

The invention discloses a sand-containing fog seal material and a preparation method thereof. The sand-containing fog seal material provided by the invention comprises the following components in parts by weight: 30-200 parts of matrix asphalt; 60 to 450 parts of water; 0.5 to 10 parts of an emulsifier; 5 to 50 parts of a thickening agent; 1 to 20 parts of a toughening agent; 0.2 to 10 parts of a modifier; and 20 to 60 parts of sand. According to the characteristics and use performance requirements of the sand-containing fog sealing layer material, good storage stability, construction workability, sand compatibility, wear resistance and water sealing performance are guaranteed, and meanwhile, the sand-containing fog sealing layer material has the effects of reducing ductility, viscoelasticity and the like of aged old asphalt and enhancing interface fusion of the old asphalt and the new asphalt; and the material cost can be greatly reduced.

The invention relates to a construction method and device of an interface mechanical model, a medium and equipment, and belongs to the technical field of ocean engineering.The method comprises the following steps that A, a viscoelastic constitutive model of a steel and high polymer material interface is established, comprising an expression of stress and displacement when the interface of the steel and the high polymer material is subjected to normal and tangential loads; b, based on a calculation formula of a cohesion model damage value, establishing a tangential and normal mixed damage model of the steel and high polymer material interface through rigidity, fracture toughness and critical damage initial stress of a spring of the steel and high polymer material interface; c, according to the viscoelastic constitutive model of the interface of the steel and the high polymer material and the tangential and normal mixed damage model of the interface of the steel and the high polymer material, the ultimate bearing characteristics of the marine composite hose at different load loading rates are analyzed.

The application discloses an impact-resistant high-thermal-conductivity polyphenylene sulfide composite material and a preparation method thereof, and relates to the technical field of plastic processing. The preparation method comprises the following steps: S1, preparation of a highly oriented PPS fiber insert; and S2, preparation of the impact-resistant high-thermal-conductivity PPS composite material. The application provides an impact-resistant high-thermal-conductivity PPS composite material and a preparation method thereof. Firstly, the viscoelasticity of PPS resin is improved by using high-melt-viscosity and high-temperature-resistant aromatic polyamide, the interfacial compatibility of PPS / aromatic polyamide is enhanced by using a functionalized polysulfone-based resin as a compatibilizer, so that the stretchability and the tensile orientation degree of PPS are improved; PPS composite fibers are obtained by using a melt spinning machine, and a fiber solid-phase high-multiple-stretching-annealing forming process is established, so that the high-toughness and highly oriented PPS composite fiber material is obtained.

The present application relates to the field of ground settlement prediction, and provides a time effect analysis method for ground settlement induced by foundation pit excavation in soft clay area, comprising: determining the time required for foundation pit construction under all working conditions and the retaining wall side displacement curve; determining the soil parameters according to the Boltzmann viscoelastic foundation model; obtaining the viscous settlement of all working conditions by using the Boltzmann viscoelastic foundation model; setting t=0 and the boundary condition as the retaining wall side displacement curve of all working conditions to obtain the elastic settlement under different working conditions; setting the boundary condition as the retaining wall side displacement curve when the bottom plate strength is formed to obtain the viscous settlement of the soil outside the pit after the bottom plate strength is formed; and summing the elastic and viscous settlement to obtain the ground settlement of the to-be-solved arbitrary working condition. The present application overcomes the problem that the existing theoretical method cannot consider the time effect of the soil, thereby leading to the problem that the prediction of the ground settlement is not safe, and also considers the ground settlement after the bottom plate strength is formed without depending on the retaining wall side displacement, which is more engineering significant and has good popularization and application value.

The utility model discloses an anti -collision's environmental sampler, including environmental sampler body, the left and right sides of environmental sampler body all are provided with swing rod suspension mechanism, and the outside of swing rod suspension mechanism is provided with the energy absorption mechanism of pluggable, and first bearing sleeve is fixed in the outer wall of environmental sampler body, and first bearing body is embedded in the middle part of first bearing sleeve, and the lower end of swing rod body is fixedly connected with first bearing body, and first mounting bracket is fixedly connected with the outside of second bearing body, and second bearing sleeve is fixed in the lower end of second mounting bracket, and third bearing sleeve is fixed in the inner wall of PC protection cover, and third bearing body is embedded in the middle part of third bearing sleeve, and rubber pad is fixed in the distal end of socket, and the upper end of PC protection cover is equipped with the apron, and the anti -collision's environmental sampler works in cooperation through swing rod suspension mechanism and the energy absorption mechanism of pluggable, through multistage mechanical vibration isolation and viscoelasticity dissipation double energy absorption mode, the anti -collision performance and field operation reliability of environmental sampler are improved obviously.

The invention discloses a diaphragm-shaped viscoelastic composite material with a solid-fluid conversion characteristic and application thereof. The preparation method of the material comprises the following steps: adding a bio-based Gemini anionic surfactant into a buffer solution, heating and stirring to form a mixed solution, and standing to obtain a diaphragm-shaped viscoelastic composite material with a solid-fluid conversion characteristic; the bio-based Gemini anionic surfactant is a gemini surfactant formed by connecting a bio-based single-chain anionic surfactant and N, N '-diphenyl-1, 3-propane diamine through an amido bond. The diaphragm-shaped viscoelastic composite material can be applied to oil and gas field development, low-viscosity flowing during injection is met through the solid-fluid conversion characteristic of the diaphragm-shaped viscoelastic composite material so that the diaphragm-shaped viscoelastic composite material can enter the deep part of a stratum to achieve deep profile control and displacement of an oil reservoir, and high-viscoelastic plugging is achieved after injection; the diaphragm-shaped viscoelastic composite material disclosed by the invention is used as a deformable plugging agent and a profile control and flooding agent for plugging and profile control and flooding operation of micro-nano pore throat strata.

The application discloses a method for analyzing nonlinear dynamics and stress wave propagation characteristics of a dielectric elastomer actuator structure. The method considers the strain hardening effect and viscoelasticity of the dielectric elastomer material, establishes a dynamic model of the dielectric elastomer actuator structure from linear damping assumption and considering material viscoelasticity respectively, calculates the equilibrium deformation and inherent frequency of micro-vibration near the equilibrium state, studies the nonlinear dynamic response of the structure under alternating voltage load, explores the influence law of the constitutive parameters on the nonlinear dynamic response, and analyzes the internal relationship between material viscoelasticity and structure vibration damping. In addition, considering compressibility, the stress wave propagation characteristics in the finite deformation state are studied, the separation phenomenon of transverse wave and longitudinal wave is analyzed, and the influence of the constitutive parameters and strain hardening effect on the stress wave propagation characteristics is explored. The application can provide a theoretical basis for the fine design of the dielectric elastomer actuator and the control of stress wave propagation by adjusting the electric field.

To provide an electrophotographic photoreceptor having excellent wear resistance and a surface layer that suppresses image blurring. [Solution] An electrophotographic photoreceptor having a surface layer containing a polymer of a polymerizable charge-transporting compound, wherein in kinematic viscoelasticity measurements, the relationship between the storage modulus G' and the loss modulus G'' of the surface layer is G'>G'' at room temperature, and the Tanδ peak top is in the temperature range of 85°C to 100°C.

The invention belongs to the technical field of NVH (noise vibration and harshness) control of automobile body structures, and particularly discloses an acoustic vibration optimization structure supported by a back door windscreen wiper support outer plate, which comprises a back door outer plate, a back door inner plate and an outer plate supporting plate. The outer plate supporting plate forms a first assembling point position in a first preset area, and a through rigid connecting layer is formed through three-layer spot welding through a first assembling technology; a second assembly point position is formed in a second preset area, and a viscoelastic interlayer is formed by gluing the shock insulation glue through a second assembly process; a plurality of mounting points on the back door inner plate are circumferentially distributed on the periphery of the second assembly point; the circumferential reinforcing part is composed of a back door hinge reinforcing plate assembly, a back door spring reinforcing plate assembly and a back door lock reinforcing plate and surrounds the periphery of the outer plate supporting plate; the rear windscreen wiper mounting structure has the advantages that under the condition that a rear windscreen wiper mounting plate is omitted, the out-of-plane rigidity of a mounting point is improved, vibration and abnormal sound of an outer plate are restrained, complex modeling is adapted, and weight and cost are reduced.

The application discloses a kind of horizontal load friction type pipe pile top rigidity determination method, adopt theoretical method, the soil around pile is regarded as viscoelastic continuous medium, and based on the proposed friction type pipe pile theoretical model under horizontal load, the horizontal load friction type pipe pile top rigidity expression is deduced using analytical method, with rigorous logic;The influence of the resistance of soil around pile and the resistance of pile core soil on pipe pile is considered simultaneously, which is more in line with reality;By substituting relevant parameters for calculation, the image drawn according to the obtained results can accurately describe the horizontal load friction type pipe pile horizontal top rigidity under horizontal load, the method is efficient and simple, the calculation result is specific and clear, and can provide a good reference for the practical application of friction type pipe pile in pile foundation field.

This invention discloses a displacement amplification damper for power transmission lines, comprising a guiding device, a viscoelastic energy dissipation device, a steel pipe torsional yielding energy dissipation device, and a rotating plate. The guiding device is connected to the steel pipe torsional yielding energy dissipation device, which is connected to the viscoelastic energy dissipation device via the rotating plate. The guiding device includes a main support shaft and a secondary support shaft, which are connected to the transmission tower and hinged to the rotating plate via a mounting plate and an ear plate. The viscoelastic energy dissipation device includes a constraint end plate, a constraint steel pipe, a pin, a fan-shaped rotating shaft, and a viscoelastic energy dissipation rubber rod. The viscoelastic energy dissipation rubber rod engages with the groove of the fan-shaped rotating shaft to dissipate energy. The steel pipe torsional yielding energy dissipation device includes an outer steel pipe, a stiffening plate, and a stiffening steel pipe, further dissipating energy through torsional yielding. This invention effectively protects power transmission lines from vibration through displacement amplification and multiple energy dissipation mechanisms, improving the safety and stability of power transmission lines.

The application discloses a high-airtightness inflatable body and a breathing protection suit and a filling-storage-gas releasing protection method thereof, and relates to the field of protection suits. The protective suit is made of high-viscoelasticity, high-airtightness, inflatable and light protective fabric, the inner side of the protective face screen is attached with a layer of anti-fog coating, the protective half-face mask is made of light plastic shell, the inside of the protective half-face mask is made of thermoplastic elastomer material, which can better fit the parts of the face, and the half-face mask air suction valve and the quick-release assembly are arranged on one side of the protective half-face mask and in the inside of the mounting box, so that the poor air permeability of the protective suit is solved, the humidity and heat generated by the human body during the operation process can be accumulated in the protective suit and cannot be eliminated, the operation personnel are affected, and the problems that the back-mounted oxygen cylinder and the heavy protective suit bring certain troubles to the operation process are solved.

The invention discloses a ceramic nanofiber, a preparation method thereof and prepared ceramic aerogel, and the method for preparing the ceramic nanofiber comprises the following steps: 1) mixing and uniformly dispersing an inorganic precursor, a chelating agent, a solvent and a stabilizer to obtain mixed sol; 2) generating linear inorganic polymer sol with activity by controlling hydrolysis and condensation polymerization of an inorganic precursor in the mixed sol; (3) carrying out equilibrium concentration on the linear inorganic polymer sol so as to regulate the viscosity and viscoelasticity of the sol to be in a proper range; and 4) carrying out electrostatic spinning on the sol regulated in the step 3) to obtain precursor fibers, and calcining the precursor fibers to obtain the ceramic nanofibers.According to the method disclosed by the invention, the high-strength doubled ceramic nanofibers can be rapidly prepared, and the doubled ceramic nanofibers can be simply and conveniently assembled into a high-elasticity ceramic aerogel material.

The invention relates to the technical field of electric energy measurement, in particular to a food stirrer energy consumption intelligent monitoring system which comprises an electric signal synchronization module, a ripple layering judgment module, a starting load judgment module, a stage energy consumption analysis module and a viscoelastic characteristic evaluation module. According to the method, a slope abrupt change point index is positioned through slope difference of voltage and current sampling points, time alignment of electric signals is realized, a ripple change sequence is constructed based on amplitude difference, classification is carried out according to hierarchical intervals, and the number of times and amplitude accumulation of various ripples are counted to form a ripple hierarchy coefficient. The method comprises the following steps: generating adhesion grade information by combining the deviation degree of slope change in a starting stage, dividing a stirring stage according to a power symbol continuous section, eliminating a starting interference section, calculating a power cumulant of an effective section to form a stage energy consumption structure parameter, generating a torque fluctuation index according to the comparison of steady-state power and rotation quantity, and performing grade screening. And viscoelastic structure parameters are formed.