60 results about "Elastic matrix" patented technology

The invention relates to the technical field of battery materials, and discloses a modified diaphragm, a preparation method thereof and a negative-electrode-free sodium metal battery. The modified diaphragm comprises a base membrane and a first functional layer arranged on one side of the base membrane; the first functional layer comprises an isotropic elastic matrix and inorganic nanoparticles distributed in the elastic matrix, and the mass ratio of the inorganic nanoparticles to the elastic matrix is (150-200): (100-125). The modified diaphragm can uniformly buffer the huge expansive force of the non-cathode sodium battery, so that the permeation of sodium metal into pores of the diaphragm is inhibited, and the occurrence of short circuit of the battery is avoided.

The present application belongs to the technical field of structure optimization design, and discloses a macro-micro double-scale structure topology optimization method and equipment capable of controlling the minimum size of microstructure, comprising the following steps: (1) interpolating the elastic matrix and the corresponding density of the actual microstructure in the offline database by using radial basis function interpolation, and then constructing a mapping model; (2) constructing a compliance minimization optimization model, wherein the design variables of the optimization model are the cutting height of two virtual microstructures in each unit and the topology variable, and the constraint functions are the volume fraction of the overall structure and the topology variable constraint; (3) calculating the sensitivity of the objective function and the constraint function to the design variable, and then updating the design variable; (4) when the compliance error of the updated double-scale structure meets the optimization termination condition, the optimization is completed and the double-scale structure meeting the requirements is obtained; otherwise, go to step (3). The present application solves the problems of low calculation efficiency and poor connectivity.

This invention provides a phosphorus-containing flame retardant, its preparation method and application, and a resin composition and its application, specifically relating to the field of polymer materials technology. The phosphorus-containing flame retardant provided by this invention achieves an integrated design of the flame-retardant unit and the elastic matrix at the molecular scale by directionally and controllably grafting phosphorus-containing groups M onto the active sites of the polybutadiene soft segments in a styrene-butadiene-styrene block copolymer via covalent bonds. This structure retains the inherent high flexibility, impact resistance, and processing rheological properties of the styrene-butadiene-styrene block copolymer while imparting intrinsic, durable, and uniformly distributed flame-retardant capabilities to the material. Simultaneously, because the phosphorus element is anchored to the polymer backbone / side chain, no small molecule polar impurities are introduced, significantly suppressing dielectric polarization loss and hygroscopicity increases. This provides a structural basis and performance guarantee for the subsequent construction of a high-end thermosetting resin system for copper-clad laminates with low Dk / Df, high Tg, and low CTE.

This invention relates to the fields of microelectromechanical systems (MEMS) and new energy technologies, and discloses a piezoelectric energy harvester based on a nonlinear gradient negative Poisson's ratio structure. Its elastic matrix has a fixed end and a free end, with a negative Poisson's ratio structural segment on it. The piezoelectric transducer element is bonded to the surface of the negative Poisson's ratio structural segment via an epoxy resin adhesive layer. The core innovation lies in the nonlinear monotonically decreasing thickness of the elastic matrix from the fixed end to the free end along its length. This change profile is defined by a specific cubic polynomial function, which can accurately approximate the theoretical model of an isostress beam, making the stress distribution on the matrix surface tend to be uniform during vibration. Simultaneously, the lateral expansion characteristics of the negative Poisson's ratio structural segment and the longitudinal stress enhancement effect of the nonlinear thickness synergistically amplify the charge output of the piezoelectric element. This invention significantly improves the utilization efficiency of piezoelectric materials and the power density of the energy harvester, and has the advantages of compact structure, high energy conversion efficiency, and mass production via 3D printing.

The application provides an isometric topology optimization method and device based on thermal elastic metamaterial design, and relates to the field of isometric topology optimization. The method comprises the following steps: constructing a multi-material interpolation model corresponding to the thermal elastic metamaterial, and obtaining a plurality of groups of density distributions corresponding to a plurality of solid materials in the thermal elastic metamaterial design domain according to the multi-material interpolation model, one solid material corresponding to one density distribution; obtaining the relationship interpolation between the plurality of groups of density distributions, and obtaining the elastic modulus and the thermal expansion coefficient according to the relationship interpolation; calculating the equivalent elastic matrix corresponding to the thermal elastic metamaterial according to the elastic modulus, and calculating the thermal expansion coefficient matrix corresponding to the thermal elastic metamaterial according to the thermal expansion coefficient; performing discrete form processing on the calculation equations of the equivalent elastic matrix and the thermal expansion coefficient matrix through the isometric grid, constructing a constraint function according to the equivalent elastic matrix, constructing an objective function according to the thermal expansion coefficient matrix, and calculating the sensitivity information corresponding to the first design variable through the objective function and the constraint function; updating the first design variable according to the sensitivity information until the thermal expansion coefficient meets the convergence condition, and obtaining the second design variable when the convergence condition is met through the isometric topology design model of the negative thermal expansion metamaterial; and optimizing the thermal elastic metamaterial according to the second design variable. The application solves the problem that the finite element method is difficult to guarantee the efficient and high-precision design of the thermal elastic metamaterial when dealing with complex geometric structures.

This application relates to a data analysis device and a data analysis method. The data analysis device includes: a controller configured to: perform calculations based on impact simulation data of a target step using a finite element method (FEM) main program to obtain target strain parameters and target stress parameters; transmit the target strain parameters and target stress parameters to a custom subroutine; extract the maximum principal strain and maximum shear strain from the target strain parameters using the custom subroutine; determine the current target state of the porous foam material based on the maximum principal strain, where the target state is either tensile or compressive; obtain the initial stress corresponding to the target step from the target stress parameters; update the initial stress based on the maximum principal strain, maximum shear strain, and the elastic matrix, hardening matrix, and rate-sensitive matrix corresponding to the target state; and output the updated initial stress to the FEM main program so that the FEM main program can perform the next iterative calculation.

The invention relates to the technical field of composite material structure design, in particular to a reversible clamping structure shell and a manufacturing method thereof. The reversible clamping structure shell comprises a fiber composite material body which is of a composite structure formed by overlapping a reinforcement body layer and an elastic base body layer, the reinforcement body layer is formed by regularly arranging continuous fibers, and the elastic base body layer is formed by regularly arranging crossed fibers; the fiber composite material main body is provided with a buckling guide groove which is distributed in the stress direction of the fiber composite material main body, and the buckling guide groove is of a concave structure formed by pressing the surface of the shell; when external force is applied to the fiber composite material main body and the displacement reaches a preset value, the buckling guide groove guides the main body to generate controllable deformation and is switched to a stable stress state to realize clamping; after the external force is removed, the fiber composite material main body automatically rebounds to an initial state; or the fiber composite material main body is separated from the clamping under the influence of another external force in the opposite direction and rebounds to the initial state.

The invention belongs to the related technical field of structural topological optimization, and discloses a topological optimization method and equipment for a continuous carbon fiber reinforced composite material, and the method comprises the steps: S1, predicting the mechanical properties of a material at a bending printing path based on a mesoscopic representative volume element, and building a mapping relation between the curvature of the printing path and the corresponding mechanical properties of the material; s2, introducing relative density and a material direction angle for each unit to obtain a structural flexibility function containing the two design variables, and calculating an equivalent elastic matrix; s3, calculating to obtain the material mechanical property corresponding to the current unit based on the mapping relation, and updating the material mechanical property of the current unit; and S4, constructing a topological optimization model, and carrying out topological optimization by adopting the topological optimization model to obtain an optimal topological configuration. According to the method, the curvature generated by fibers induced by a bending printing path is combined, parameters are dynamically adjusted and optimized by introducing fiber curvature constraints, and the mechanical property of a final structure is remarkably improved.

The invention provides a high-fatigue-resistance high-response high-elastic fiber material and a preparation method thereof. The high-fatigue-resistance high-response high-elastic fiber material comprises a liquid crystal functional phase, the high-fatigue-resistance high-response high-elastic fiber material further comprises a thermoplastic polymer elastic matrix phase, and the thermoplastic polymer elastic matrix phase and the liquid crystal functional phase construct a modulus smooth transition gradient layer on a two-phase interface through gradient coupling and topological interlocking. The modulus smooth transition gradient layer is used for efficiently transmitting strain and smoothly dissipating stress; wherein the weight-average molecular weight (Mw) of the thermoplastic polymer elastic matrix phase is 8.2 * 10 < 4 > g / mol to 2.5 * 10 < 5 > g / mol; by mass, the usage amount of the thermoplastic polymer elastic matrix phase is 50-90 parts. The fiber material with high fatigue resistance, high response and high elasticity has efficient stimulation responsiveness, high elasticity and toughness and excellent fatigue resistance, and is better adapted to dynamic application scenes such as intelligent fabrics, wearable equipment and flexible actuators.

This invention belongs to the field of inorganic solid-state luminescent materials technology, and discloses a green mechanoluminescent composite elastic material and its preparation method, comprising an elastic matrix and a green mechanoluminescent phosphor dispersed in the elastic matrix, wherein the chemical formula of the green mechanoluminescent phosphor is Ba. 0.79 Al 10.9‑x O 17.14 :xMn 2+ (0 < x ≤ 0.35). This green mechanoluminescent composite elastomer still exhibits bright green mechanoluminescence after more than 15,000 tensile cycles. By writing characters on the composite elastomer and mapping the luminescence intensity to different colors, the color changes caused by different stress magnitudes can be clearly observed. This indicates that the prepared mechanoluminescent composite elastomer has great potential in applications such as electronic signatures, anti-counterfeiting, and structural health monitoring.

Conveyor system units configured to form part of a circulating conveyor system and a circulating conveyor system comprising conveyor system units are disclosed. The conveyor system unit (10) comprises a first slab (11) and a second slab (12), and each slab has a support surface (13) having a first and a second long side edge portion (21, 22) and two short side edge portions (23). The first and second slabs are arranged side by side relative to each other and are interconnected by an elastic matrix (30) extending across the support surface (13). Each conveyor system unit (10) further comprises a support side wall (24) arranged at each short side edge portion (23) of each slab, the support side walls (24) arranged on the same short edge side of the conveyor system unit (10) are interconnected by an elastic matrix wall (324, 324') extending across the support side walls (24).

The invention provides a magnetoelastomer and a preparation method thereof. The magnetoelastomer comprises a first magnetoelastomer film layer, a second magnetoelastomer film layer and a middle elastic layer, wherein each of the first magnetoelastomer film layer and the second magnetoelastomer film layer comprises an elastic matrix and magnetic powder particles dispersed in the elastic matrix. According to the magnetoelastic body, through the structural design of three-dimensional directional arrangement of the magnetic poles, the repulsive force of the same-polarity magnetic poles and the attractive force of the opposite-polarity magnetic poles are utilized, and dynamic compensation of energy loss is achieved when mechanical deformation of materials occurs. The technical effects that the bidirectional hysteresis effect of the magnetoelastomer in the longitudinal compression direction and the transverse stretching direction is remarkably reduced, the rebound resilience and the reversible deformation capacity of the material are improved, and the problem of performance degradation of the magnetoelastomer under long-term dynamic / static load is solved.

The invention discloses a temperature-sensing color-changing insulating sheath, an installation tool and a use method thereof, and the temperature-sensing color-changing insulating sheath comprises a temperature-sensing color-changing microcapsule and an elastic substrate with cold contraction performance. And the temperature-sensing color-changing microcapsules are uniformly dispersed in the elastic matrix. According to the invention, the installation tool is matched with the temperature-sensing color-changing insulating sheath, so that the temperature-sensing color-changing insulating sheath can be quickly connected with the wiring terminal, a disposable bracket in a cold shrink tube is replaced, the production process is simplified, the use cost is reduced, and meanwhile, an operator can intuitively obtain the heating condition of a cable.

A transformer stacked iron core elasticity matrix determination method includes a step of calculating a frequency spectrum of a vibration response function for a first provisional value and a second provisional value of transverse elastic moduli, a step of calculating a degree of coincidence between a frequency spectrum of noise and a frequency spectrum of excitation vibration for each combination of the first provisional value and the second provisional value, and adopting the first provisional value and the second provisional value when the degree of coincidence is a local maximum value as the transverse elastic moduli. The step of calculating the frequency spectrum of the vibration response function includes a step of calculating the frequency spectrum of the vibration response function for trial points distributed at a first interval in a two-dimensional space of the first provisional value and the second provisional value, and a step of calculating a frequency spectrum for the trial points distributed at a second interval by a numerical interpolation process.

The application provides a conductive diaphragm and a loudspeaker. The conductive diaphragm comprises a main body layer and a conductive layer arranged on the main body layer, the conductive layer comprises an elastic matrix and a conductive filler dispersed in the elastic matrix, and the composition of the conductive layer is as follows: the elastic matrix is 8-20 parts, the conductive filler is 76-95 parts, and a modifier is 0.1-3 parts. The conductive filler comprises a nano metal conductive filler and a micro-nano conductive filler. Compared with the prior art, the conductive layer of the conductive diaphragm has good modulus stability at high and low temperatures, the nano metal conductive filler with a melting point lower than 200 DEG C is blended with the micro-nano conductive filler as a conductive functional body, the conductive functional bodies in the conductive layer are fused with each other to form a stable conductive network, and the elastic matrix can effectively avoid problems such as sudden change of rigidity of the conductive diaphragm and poor material toughness, so that the conductivity and smoothness are considered.

The invention relates to the technical field of continuous and non-continuous fiber reinforced composite materials, and particularly discloses a high-elasticity composite fiber preparation method and a high-elasticity composite fiber preparation device.The high-elasticity composite fiber preparation method comprises the following steps that S1, oil stains and auxiliaries on the surfaces of raw material fibers are removed, and then the interface bonding force of the raw material fibers and an elastic matrix is improved through plasma treatment or coating of a coupling agent; s2, the surface of the elastic base body raw material is cleaned, and moisture in the base body raw material is removed through a vacuum drying box; and S3, the treated matrix raw materials are poured into a weightlessness scale feeding machine, and raw material fibers are poured into a fiber feeding machine. A matrix raw material is drained by the inclined surface of the cone and the arc-shaped surface of the guide sheet, so that the matrix raw material is conveniently separated from the separator, the adding and mixing work of fibers is forced to be transferred into the mixing cover to obtain an independently mixed cavity, the fibers are effectively prevented from directly contacting functional elements, and the mixing efficiency is improved. And the problems of damage to the surfaces of the screw flights and the screw grooves and carbonization adhesion are greatly reduced.

The application discloses a kind of equivalent continuum modeling method and system of floating body structure. Method includes: by structure representative unit (SRE) method, complex structure is equivalent to anisotropic structure continuum medium, the elastic matrix analytical model is established for the elastic stage of structure continuum medium, and anisotropic elastoplastic model and yield criterion are established for its elastic-plastic stage;Combining computational fluid dynamics (CFD) and finite element method (FEM) constructs two-way FSI coupling framework, realizes wave-structure-component coupling mechanism and whole-process efficient simulation from elastic response to plastic failure.The application overcomes the problem that the equivalent model based on structure mode in traditional fluid-solid coupling analysis cannot characterize interface continuity-anisotropic coupling and cannot predict limit failure behavior, and the elastic-plastic stage can accurately capture plastic initiation and damage evolution, and is suitable for fluid-structure coupling design, hydrodynamic performance optimization and limit bearing capacity evaluation of floating structure.

The invention discloses an intelligent damping material prepared from a piezoelectric ceramic complex and a preparation method of the intelligent damping material, and belongs to the technical field of vibration control materials. The material is of a three-layer composite structure including an elastic matrix layer, a piezoelectric ceramic composite layer and a restraint layer, wherein the piezoelectric ceramic composite layer is formed by compounding 30%-50% of piezoelectric ceramic particles, 5%-15% of conductive filler and 35%-65% of a polymer binder; the shore hardness of the elastic matrix layer is 30D-60D, and the elastic modulus of the restraint layer is 20GPa-80GPa. The preparation method comprises the key steps of piezoelectric ceramic particle silane coupling agent modification, composite slurry high-speed mixing, elastic matrix layer vulcanization molding, matrix surface plasma treatment, gradient hot-pressing composite curing and the like. Through interface modification and three-dimensional conductive network construction, the interface bonding strength and energy dissipation efficiency are greatly improved, the damping loss factor tan delta of the material is larger than or equal to 0.3 in the wide temperature range of-50 DEG C to 150 DEG C, the vibration attenuation rate of the material is larger than or equal to 40%, the material is suitable for vibration control of aerospace, rail transit and precision machinery, the preparation process is simple and convenient, and large-scale production is easy.

The invention belongs to the technical field of fishery measuring tools, and particularly relates to a portable fish measuring ruler which comprises a containing cylinder, a rotating rod is rotationally connected to the interior of the containing cylinder through a bearing, a winding roller is fixed to the rod wall of the rotating rod, a fish measuring ruler body is fixed to the side wall of the winding roller, and scale marks are arranged on the upper side of the fish measuring ruler body. A limiting baffle plate is fixed at the left end of the fish measuring ruler main body; the fish measuring ruler comprises a fish measuring ruler main body, the fish measuring ruler main body is made of a soft carbon fiber composite material, the soft carbon fiber composite material is formed by compounding carbon fiber filaments and a thermoplastic polyurethane elastic matrix, and the surface of the soft carbon fiber composite material is coated with a waterproof nano coating, the fish measuring ruler main body is made of the soft carbon fiber composite material, and the problems of rusting and deformation of a traditional material are solved; through the high-precision laser engraving technology, long-term clearness of scales is guaranteed, abrasion is avoided, the waterproof, high-temperature-resistant and impact-resistant performance is achieved, the device adapts to the complex working environment, soft materials can be curled and stored, and the requirement for the storage space is lowered.

The invention belongs to the technical field of mechanical luminescent materials, discloses an efficient mechanical luminescent flexible composite material based on HNTs regulation and a preparation method thereof, and aims to solve the problem that the luminescent intensity of a mechanical luminescent material in the prior art cannot meet requirements. HNTs are modified by using a silane coupling agent, and SCA-HNTs powder is obtained; znS: Cu and SCA-HNTs powder are dispersed in an ethanol solution, low-temperature drying is performed to obtain ZnS: Cu-HNTs luminescent powder, the luminescent powder and a prepolymer are mixed, vacuum treatment, degassing and curing are performed to obtain the efficient mechanical luminescent flexible composite material, and the mechanical luminescent property of ZnS: Cu in an organic polymer elastic matrix can be improved. The luminous intensity and stability are improved, and the application prospect in the fields of anti-counterfeiting and artificial intelligence sensing is widened. And the elastic modulus of the flexible composite material is improved.

The invention discloses a concrete protective coating and a preparation method thereof. The concrete protective coating comprises a composite structure consisting of an elastic polymer matrix and a functional filler dispersed in the elastic polymer matrix, the functional filler comprises a reflective filler for reflecting sunlight and a radiation filler for radiating infrared rays; the reflective filler comprises titanium dioxide, and the radiation filler comprises silicon dioxide; the elastomeric polymer matrix is used to integrate and carry reflective and radiative fillers. Through the implementation of the invention, the problem of performance degradation easily occurring in traditional physical blending is avoided, more importantly, the elastic matrix provides an ideal stress buffer and distribution environment for the functional filler, the reflection and radiation performance of the coating is still kept stable under the dynamic deformation of the concrete, and the service life of the coating is prolonged. Therefore, long-term synergistic interaction of cooling and anti-cracking functions is realized, and the technical bottleneck that the performance of a single-function coating is not lasting and cannot be considered at the same time is broken through.

The invention discloses an anti-collision powder coating and a preparation method thereof, and relates to the field of coatings. Comprising the following steps: uniformly mixing epoxy resin, a phenolic epoxy curing agent, a methylimidazole catalyst, a partial thermal expansion material, glass fibers, a flatting agent, benzoin and pure polytetrafluoroethylene wax at room temperature to obtain a premix; carrying out melt blending and low-temperature extrusion on the premix to obtain a flaky material; crushing the flaky material into base material powder, and controlling the particle size to be 30-50 microns; and uniformly mixing the base material powder and the residual thermal expansion material under the conditions of normal temperature and low speed to obtain the target powder coating. According to the invention, a dual-buffer network is constructed, so that multi-stage dissipation of impact energy is realized; the special ultrahigh-epoxy-equivalent resin and the special curing agent form a tough and elastic matrix network, so that the coating not only can bear strong impact at the height of 80cm, but also has extreme flexibility of bending through a phi 5mm axis.

The invention relates to the field of vehicle sealing, and particularly discloses a sealing strip, a variable compression load sealing system and a machining technology.The sealing strip comprises a sealing strip body and further comprises a flexible sealing strip body fixedly installed on the side, close to an opponent piece, of the sealing strip body, and the flexible sealing strip body comprises an elastic matrix and a performance adjusting additive; the elastic matrix is chlorinated polyethylene or ethylene propylene diene monomer, and the performance adjusting additive comprises the following components in parts by mass: 2-3 parts of an anti-aging agent, 2-3 parts of a cross-linking agent, 5-50 parts of a plasticizer, 2-5 parts of an activating agent and a filling agent. The mass part of the filling agent is 40-60. According to the scheme, the whole flexible sealing strip body finally has durability and flexibility, the flexible sealing strip body can continuously enable the sealing strip body to be tightly sealed on the opponent piece, and the flexible sealing strip body with large elasticity can improve the attaching sealing performance between the sealing strip body and the opponent piece.

The invention discloses a coating based on a chitosan-dopamine micro-nano structure and a preparation method and application, and belongs to the technical field of biological fouling protection. Amphiphilic hydrogel and polydimethylsiloxane PDMS are compounded, interaction between the two phases is precisely regulated, and the chitosan-dopamine micro-nano structure is prepared. The uniform and stable bionic micro-nano structure is formed through spontaneous induction in the coating curing process. According to the invention, two mechanisms of fouling resistance (realized by a hydrophilic hydration layer) and fouling release (realized by a PDMS elastic matrix) are organically combined, intelligent management and control of antifouling ions are realized through a fixed interface water layer, the interface action efficiency is remarkably improved, and the environmental release amount is greatly reduced; the common phase separation problem of a hydrophilic-hydrophobic composite material is solved, and the composite coating with stable performance and uniform structure is obtained.

The present application relates to the technical field of skin bag material, and particularly relates to a weather-resistant elastic composite skin bag material and a preparation method thereof, which is prepared from the following components: 65-85 parts of elastic matrix resin, 10-20 parts of elastic reinforcing agent, 4-9 parts of weather-resistant agent, 1-4 parts of plasticizer, 0.5-2.0 parts of antioxidant, and 0.3-1.0 parts of lubricant. The present application designs a multi-component synergistic composite weather-resistant agent to achieve all-round weather resistance: abandoning the single action mode of traditional small-molecule weather-resistant agents, adopting bentonite, boron nitride and nano-silicon carbide as physical barrier phases, lanthanum oxide as a chemical stable phase, chitosan and sodium silicate as interface compatible phases, and nano-cellulose agent as a dispersion reinforcing phase.

The invention relates to the technical field of composite materials and textile engineering, and discloses an innovative preparation technology of high-strength elastic composite fiber cloth, which comprises the following steps: S1, firstly carrying out limit twisting and heat setting subzero treatment on high-strength fiber precursors, so that the high-strength fiber precursors are converted into micro-spiral memory fibers with built-in torsional stress; s2, performing surface activation treatment on the micro-spiral memory fiber, and anchoring a thermosensitive catalyst in the surface texture of the micro-spiral memory fiber at a fixed point; s3, preparing a supramolecular elastic matrix solution containing dynamic reversible bonds; the high-strength fiber is subjected to limit twisting, heat setting and cryogenic quenching treatment to be converted into the micro-spiral memory fiber with built-in torsional stress, rigid tensile deformation of the high-strength material is successfully converted into microscopic geometric torsional deformation, the stress relaxation problem of a traditional high-strength composite material after tensile unloading is effectively solved, and the mechanical property of the high-strength material is improved. The elastic recovery rate and the creep resistance are greatly improved.

The application discloses a flexible circuit board with a composite electromagnetic shielding film and a manufacturing method thereof. The method comprises the following steps: providing an elastic matrix solution and a metal conductive solution respectively; forming an electromagnetic shielding film solution based on the elastic matrix solution and the metal conductive solution; providing a flexible board substrate; coating the electromagnetic shielding film solution on the flexible board substrate; and making the electromagnetic shielding film solution form a composite electromagnetic shielding film to obtain a target flexible circuit board. The composite electromagnetic shielding film is not prone to delamination and fracture in the dynamic bending application of the FPC product, can simultaneously meet the requirements of the increasingly high bendability and service life of the FPC product, has a simple process, a self-defined coating shape, and can realize fixed-point and fixed-quantity coating; the thickness, area and surface roughness of the formed film can be controlled; the cost waste can be reduced; and the design of the lightweight and thin flexible circuit board is facilitated.

A method for determining an elastic matrix of a laminated core of a transformer includes: calculating a degree of coincidence between a frequency spectrum of noise and a frequency spectrum of excitation vibration for each combination of a first assumed value and a second assumed value of a lateral elastic modulus; and a step in which the first assumed value and the second assumed value when the degree of coincidence becomes the maximum value are used as the lateral elastic modulus. The step of calculating the degree of coincidence includes: a step of calculating the degree of coincidence of test points dispersed within a predetermined range; setting a limited small area; and a step of calculating the degree of coincidence of the search points located between the test points within the defined small region.

The application discloses an equal geometry-based multi-scale topological optimization method for anisotropic periodic structure material, and comprises the following steps: (1) modeling according to an equal geometry analysis method to obtain discrete point information of a macro periodic structure and various microstructure design domains, and dividing a design subdomain for the macro periodic structure design domain; (2) constructing a coordinate conversion relationship between a natural coordinate system and a material coordinate system in an anisotropic material; (3) performing periodic material distribution optimization to determine the position of various microstructures in the macro periodic structure and the volume fraction of various microstructures by normalizing the relative density; and (4) performing periodic structure / material multi-scale parallel topological optimization to determine the macro periodic structure, various microstructures and equivalent elastic matrices thereof. The application performs multi-scale topological optimization for an anisotropic periodic structure / material based on equal geometry analysis, and is accurate, stable and efficient in convergence, and can improve the structure performance from the macro and micro scales and the structure and material angles.

The disclosed polymer composition includes a fluorine-containing elastomeric matrix and a fluorine-containing filler. The fluorine-containing elastomeric matrix includes a fluorine-containing elastomer and the fluorine-containing filler includes a fluorinated carbon-based molecule. An amount of the fluorine-containing filler is dispersed in the fluorine-containing elastomeric matrix. A polymer composition is used to form a sealing element having an annular body to withstand harsh environments.