1344 results about "Rough surface" patented technology

The invention relates to the field of abrasion morphology determination and abrasion loss calculation, and discloses an abrasion morphology and contact stress analysis and prediction method and system based on a rough contact surface, a medium and equipment, and the method comprises the steps: constructing a dynamic contact model, and obtaining an accurate movement rule and a stress analysis result of a moving mechanical component; constructing a three-dimensional rough surface digital twinborn model conforming to an actual contact surface; establishing a contact stress field multi-physical field analysis model to obtain elastic deformation and a friction heat effect; based on the contact stress distribution and the local wear rate which are obtained in real time, carrying out dynamic reconstruction on the wear morphology, and establishing a nonlinear iteration relation between the wear loss and the contact stress distribution; determining an accurate boundary condition based on an accurate movement rule and a stress analysis result of the moving mechanical component, and constructing a failure criterion based on contact stress gradient mutation and surface roughness evolution; key parameters are calibrated through experiments, and a mapping relation database of wear rate-stress state-morphological characteristics is established so as to carry out friction wear analysis.

The invention discloses an injection filler and a preparation method and application thereof, the filler is polycaprolactone particles, the polycaprolactone particles are spherical particles, the particle size of the spherical particles is 20-100 [mu] m, and the polycaprolactone particles have rough surfaces or unsmooth surfaces. The polycaprolactone microspheres have rough surfaces or unsmooth surfaces, so that the contact area with cells is increased, the adhesion ability and residence time of the cells are improved, the affinity of the polycaprolactone microspheres is improved, and the growth of collagen can be stimulated and accelerated. In the preparation process, the dosage of each component is scientifically screened, and on the basis of controlling the viscosity of a water-phase solution, the spherical polycaprolactone particles which are regular, rough in surface and uniform in particle size are obtained in cooperation with a rapid membrane emulsification method.

The invention relates to the field of sealing testing, in particular to a sealing performance analysis method based on elastic-plastic contact calculation of finite element-boundary element coupling, which comprises the following steps: establishing a finite element model of a sealing structure, and obtaining contact pressure distribution of a sealing contact interface; dividing the sealed contact interface into a plurality of fan-shaped areas, and processing each fan-shaped area into a rectangular area; generating a rough surface of which the surface height value has a specified statistical distribution rule for each rectangular region, performing equivalent contact simplification for the rough surface in the sealing contact process, and solving the microscopic contact state of the rough surface; and constructing a contact state matrix based on the microscopic contact state, and determining a leakage channel by using the contact state matrix. The problems that a traditional rough surface microcosmic contact finite element simulation method is low in calculation efficiency and elastic-plastic contact deformation convergence is difficult are solved, and the efficiency of microcosmic contact calculation and sealing performance analysis is greatly improved.

The invention discloses a metal fatigue life prediction method under laser shock peening, and relates to the technical field of metal material fatigue life prediction. The invention discloses a metal fatigue life prediction method under laser shock peening. The metal fatigue life prediction method comprises the following steps of roughness model construction, roughness evolution simulation, roughness value calculation, material attribute endowing and fatigue life prediction. According to the method, the real surface is subjected to laser shock peening, the roughness evolution condition of the metal surface subjected to laser shock peening is accurately predicted, and then the fatigue life is predicted by adopting a method of combining a Basic-Manson-Coffin formula and continuous damage mechanics. The method fully considers the local complex stress-strain state under the evolution of the roughness surface microstructure after laser shock peening, truly simulates the fatigue progressive damage process of the sample after comprehensive consideration of laser shock peening, and can effectively improve the prediction precision of the fatigue life of the metal after laser shock peening.

The invention discloses a nano twin copper rough surface direct bonding atomic-scale simulation method, which comprises the following steps: determining an inter-atomic interaction potential function in molecular dynamics through a first principle, constructing a polycrystalline nano twin copper supercell model based on experimental parameters, and generating a rough surface with fractal characteristics; molecular dynamics simulation is adopted to simulate bonding and annealing processes, a bonded polycrystalline nano twin copper model is obtained, and the performance of the interconnection structure is calculated based on the bonded polycrystalline nano twin copper model. The result feedback is used for optimizing the copper-copper direct bonding material and process parameters. According to the method, the atomic-scale polycrystal nano twin copper model is established through simulation, the optimal performance parameter combination of the interconnection structure is obtained, the trial and error cost in tests and production is reduced, the quality of a copper-copper direct bonding interface is improved, and guidance is provided for design and process optimization of high-density packaging.

The invention discloses a wood color difference online detection method based on spectral reflectivity reconstruction, relates to the technical field of wood dyeing detection, and aims to solve the problems that in the prior art, dyed wood has textures, the surface is rough in the processing process, and color difference detection is influenced by diffuse reflection and scattering of light, so that the color difference detection accuracy is low. According to the method, in the spectral reflectivity reconstruction process, the multi-channel response value is used, meanwhile, the characteristic of the wood surface roughness is introduced, the model is trained, and the spectral reflectivity reconstruction precision is improved. And finally, according to the Lab value and in combination with a chromatic aberration formula, obtaining a chromatic aberration value between the standard wood and the wood dyed veneer image to be detected. Therefore, the influence of diffuse reflection and scattering of light on chromatic aberration detection is avoided, and the chromatic aberration detection accuracy is improved.

The invention discloses a semiconductor structure processing method and a semiconductor structure, and the processing method comprises the steps: providing a substrate with a high-aspect-ratio etching structure, and enabling the side wall of the high-aspect-ratio etching structure to have rough surface morphology; performing a first treatment on the surface of the sidewall using first neutral particles to generate an oxide layer on the surface of the sidewall; performing second treatment on the surface of the side wall by using second neutral particles so as to remove the oxide layer and reduce the roughness of the surface of the side wall; and performing third treatment on the surface of the side wall by using third neutral particles so as to repair lattice damage existing on the surface of the side wall. According to the method, different neutral particles are excited by using metastable state particles, and the rough surface of the side wall is correspondingly treated, so that the treatment degree can be finely controlled, lower damage is realized, the uniformity is more controllable, the surface of the treated side wall is smoother, and the performance of a device is improved.

Disclosed is a negative pressure suction-based fixing device comprising a housing, a suction and holding member, a negative pressure creating assembly and a sealing member. The housing has an accommodating cavity thereinside. The suction and holding member has an abutting and holding surface recessed to form a suction cavity communicated with the accommodating cavity. The abutting and holding surface has a mounting structure connected to the sealing member, so that the sealing member is arranged on the abutting and holding surface for abutting against the suction surface. The sealing member can be elastically deformed to fit with the suction surface so as form an enclosed space together with the cooperation of the suction cavity and the suction surface. In this way, it is difficult for the negative pressure suction-based fixing device to fall off from a rough surface.

The invention discloses a low-strength polyester fully-drawn yarn and a preparation method and application thereof.The preparation method comprises the steps that a polyester melt is sprayed out of a yarn strip through a spinneret orifice with a flat cross section, the yarn strip is cooled and oiled, then the yarn strip makes frictional contact with a brittle damage part with a rough surface layer, the yarn strip enters a pre-interlacer to be treated, drawn and shaped, and the low-strength polyester fully-drawn yarn is obtained. The main network is interlaced; wherein the surface roughness Ra of the rough surface layer is 0.5-1.5, filaments located between the brittle damage part and the pre-interlacing device enter the pre-interlacing device at an included angle alpha, the acute included angle between the filaments entering the pre-interlacing device and the perpendicular normal of the end face, where the filaments enter, of the pre-interlacing device is the included angle alpha, and the included angle alpha is 10-30 degrees; according to the method, the ideal brittle damage effect of the polyester filaments can be achieved without being subjected to multiple treatments such as a high-temperature environment, strong alkali and alcohol, the energy consumption and the cost are low, and the prepared cloth has low tearing strength and is suitable for preparing medical adhesive tape, wiring harness adhesive tape or trademark cloth.

The invention relates to the technical field of biomedical materials, and discloses a high-stability porous hydroxyapatite microsphere as well as a preparation method and application thereof, and the porous hydroxyapatite microsphere is formed by self-assembling nano-scale hydroxyapatite particles under the driving of a thermodynamic behavior of reducing excess surface free energy; the porous hydroxyapatite microspheres are nano-scale to micron-scale microspheres with rough surfaces; the porous hydroxyapatite microspheres have a nano-scale pore channel structure; the mineralization is improved under the assistance of the porous hydroxyapatite microspheres; the defects that hydroxyapatite microspheres in the prior art are sharp in microstructure, poor in histocompatibility, free of a porous structure and the like are overcome, the preparation method is simple, the safety coefficient of the production process is high, the obtained porous microspheres are stable in structure, various parameters can be adjusted according to requirements, and the method is suitable for industrial large-scale production.

The invention belongs to the technical field of image processing, and particularly relates to an ore grinding and screening monitoring method and system based on image particle size analysis, and the method comprises the steps: collecting an ore image, generating a distance transformation diagram, and constructing an extreme value topology network; calculating the relative topology significance of adjacent maximum value points, and constructing a peak-valley independence index in combination with the spatial distance; performing iterative fusion on the maximum value points based on the peak-valley independence index to obtain a final mark set; and performing watershed segmentation by taking the final mark set as a seed, calculating ore particle size cumulative distribution, extracting a characteristic particle size index, and adjusting grinding process parameters according to the characteristic particle size index. Through the combined constraint of the relative topology saliency and the peak valley independence index, the method can adapt to multi-scale features and effectively eliminate the interference of the surface texture of the ore, solves the problem of over-segmentation caused by rough surface in the traditional method, and realizes the real-time optimization, energy conservation and consumption reduction in the grinding process.

The invention discloses a phased array ultrasonic detection rough surface coupling agent dynamic supplementing and sealing system which comprises a flexible sealing structure, a coupling agent supply unit, a pressure feedback control unit and a self-adaptive attaching structure. A flexible sealing structure is adopted to form a continuous liquid coupling film between the probe and the detected joint, and the coupling agent supply unit actively supplies liquid to keep the thickness of the liquid coupling film stable in a range of 0.5-1.5 mm so as to reduce ultrasonic energy loss and a blind area; in addition, the coupling agent liquid can be controlled not to leak or the leakage can be controlled within an acceptable range through the sealing mechanism, and the coupling agent supply unit is matched to continuously and stably supply the liquid, so that the coupling layer is ensured to be uninterrupted in the scanning process.

The invention relates to the technical field of ceramic phase coatings, in particular to a high ceramic phase gradient coating preparation process which comprises the following steps: (1) metal matrix pretreatment; (2) constructing a coating material; (3) plasma spraying; (4) thermal shock strengthening treatment; according to the preparation technology of the high-ceramic-phase gradient coating, through reasonable matching of all the components and optimization of the technology, the performance in multiple aspects is obviously improved. In the metal matrix pretreatment stage, a micro-nano rough surface is constructed by adopting a laser texturing technology, so that the roughness of the surface of the matrix is increased, more mechanical occlusion points are provided for the coating, pollutants and an oxide layer on the surface are removed, the activity of the surface of the matrix is improved, and the bonding strength of the coating and the matrix is remarkably enhanced. Mainly, mechanical interlocking is formed between the rough surface structure and the coating, and chemical bonding between the coating and a base body is promoted through the clean and high-activity surface, so that the bonding strength is greatly improved.

The invention provides an automatic production line and method for producing enameled wires. The automatic production line comprises a pay-off unit, an annealing box, a painting unit, a baking oven, a cooling unit, a lubricating unit and a take-up unit. The painting unit comprises a painting shell arranged on the ground, a transverse plate is installed in the painting shell, a plurality of painting pipes are arranged on the transverse plate, flowing pipes are arranged on the painting pipes, a circulating pump and a filtering shell are arranged on the flowing pipes, and a connecting plate is arranged in the painting shell. A wire bypasses the guide wheel at the bottom, upwards penetrates through the painting pipe from the bottom, then is wound on the guide wheel at the top and is output outwards; a rotary driving piece c drives one chain wheel b to rotate, a plurality of rotary sleeves are driven to rotate through a chain b, a rough surface is driven to rub the outer surface wall of the wire, the roughness of the outer surface wall of the wire is increased, and the outer side of the wire is coated with paint liquid in a painting pipe; and the paint liquid smearing effect is enhanced by increasing the roughness of the outer surface wall of the wire.

The utility model provides an end cover assembly, an energy storage device and electric equipment. The end cover assembly comprises a cover body, a pressing ring and a pole, the cover body is provided with an assembling hole, the assembling hole penetrates through the cover body in the thickness direction of the cover body, the pressing ring is located on one side of the cover body in the thickness direction, the pressing ring is provided with a matching hole, the matching hole penetrates through the pressing ring in the thickness direction of the pressing ring and is communicated with the assembling hole, and the pole penetrates through the assembling hole and the matching hole. The pressing ring is welded and fixed; wherein the pole comprises a pole connecting surface deviating from the cover body, the pressing ring comprises a pressing ring connecting surface deviating from the cover body, the pressing ring connecting surface is arranged around the matching hole and the pole connecting surface, and at least one of the pole connecting surface and the pressing ring connecting surface is a rough surface.

The invention relates to the technical field of display, and particularly provides a display panel and a preparation method thereof and a display device.The display panel comprises a substrate and an isolation structure, the isolation structure is located on one side of the substrate, and a plurality of isolation openings are defined by the isolation structure; a first film layer is arranged on one side, facing the isolation opening, of the isolation structure, and a rough surface is arranged on the surface of one side, facing the isolation opening, of the first film layer; wherein the material of the first film layer is different from that of the isolation structure. The application is used for improving the use performance of the display panel to a certain extent.

The invention relates to the technical field of copper-aluminum composite welding, in particular to a thin aluminum bar lap welding method. The method comprises the following steps: firstly, carrying out microstructure regulation and control on a welding surface by adopting a mechanical directional polishing technology, effectively removing a surface oxide layer and forming a uniform rough surface; secondly, accurate management of heat input is achieved through a gradient temperature control strategy, and heat damage to the thin-wall material is avoided; and meanwhile, mutual diffusion of copper atoms and aluminum atoms is promoted by combining a metallurgical transition layer technology, and stable metallurgical bonding is formed. In terms of structural design, a unique positioning system ensures the assembly precision, and the process stability is remarkably improved in cooperation with an optimized welding process. According to the method, the welding quality of the thin aluminum row is improved in a breakthrough mode, meanwhile, the good industrial production adaptability is achieved, and a reliable solution is provided for the connection technology in the fields of power batteries, energy storage equipment and the like.

The invention discloses sphere-like silver powder with a rough structure on the surface and a preparation method and application of the sphere-like silver powder. The preparation method comprises the following steps that a silver nitrate solution, a reducing agent solution and a dispersing agent solution are prepared respectively, and the reducing agent solution contains an organic doping auxiliary agent prepared by mixing polyol, polyoxyethylene ether, salt and alkali; dropwise adding the silver nitrate solution and the reducing agent solution into the dispersing agent solution at the same time, and carrying out stirring reaction after charging is finished to obtain a reaction solution; and the reaction liquid is settled, supernate is poured out, then absolute ethyl alcohol is added for dispersion, and after dispersion is finished, solid-liquid separation, washing and drying are conducted to obtain the sphere-like silver powder with the rough structure on the surface. According to the method, the monodisperse silver powder with the rough structure on the surface is successfully prepared on the basis of the spherical silver powder, the single particle morphology of the silver powder is similar to a sphere, and the rough structure exists on the particle surface. The silver powder is mainly used in front slurry of a solar photovoltaic cell, and has good electrical property and linearity.

The invention discloses a strong friction bionic surface suitable for smooth and rough surfaces and a preparation method, the strong friction bionic surface comprises a rigidity-variable epoxy shape memory polymer, the rigidity-variable epoxy shape memory polymer is structurally divided into three layers, namely a backing layer, an inclined micro-cylinder array and a smaller-size secondary micro-cylinder array from bottom to top, the backing layer is conveniently fixed on a heating substrate and transfers heat, and the inclined micro-cylinder array is low in rubber-state cylinder modulus in a normal contact stage, so that the inclined micro-cylinder array can be in conformal contact with a dual surface better; before sliding friction, the cylinder is switched to be in a glassy state, the modulus is high, deformation is small, the anti-shearing effect can be effectively improved, and damage caused by large deformation is not likely to happen; the second-stage micro-column array has low contact rigidity when being in contact with a smooth surface or a rough surface, can be well adapted to planes with different sizes of roughness, and is embedded with rough peaks to increase the contact area.

The invention relates to the technical field of visual identification and detection of polishing robots, in particular to a multi-type polishing area detection algorithm for casting autonomous polishing. Comprising the following steps of S1, process type classification, S2, defect type classification, S3, bulge type defect detection, S4, crator defect detection, S5, rough surface defect detection and S6, point-by-point grinding process detection. According to a grinding target area detection algorithm provided by the invention, a position sensing basis is provided for grinding track planning by classifying grinding areas; different detection algorithm libraries are formed and deployed in a system of the grinding robot, the adaptability to detection of the to-be-ground area can be enhanced, and the working capacity of the grinding robot is improved.

A component carrier including: i) a stack with at least one electrically insulating layer structure and at least one electrically conductive layer structure; ii) a first metal trace comprising a rough surface; and iii) a second metal trace arranged adjacent to the first metal trace, comprising a smooth surface. The component carrier is configured to guide high-frequency and or high-speed signals through the second metal trace.

The invention belongs to the technical field of gravity dam construction, and provides an assembled concrete cooling pipe structure and method for gravity dam construction. The cooling pipe is composed of a plurality of pipe body units connected in series, and lining pieces are arranged in metal pipes of the pipe body units. The lining piece and the elastic steel sheets form a criss-cross cage type structure through the strip-shaped plates, the strip-shaped plates are provided with pitted surfaces and notches, the steel sheets can stretch out and draw back to achieve variable-diameter adjustment, and water flow can be forced to generate turbulent flow to damage the laminar flow bottom layer. The method comprises the steps of raw material pretreatment, notch and pitted surface machining, lining piece assembling, metal pipe assembling and fixing and pipe body unit series connection. The structure is stable, manufacturing is convenient, boundary layer thermal resistance can be reduced, heat transfer efficiency is improved, concrete temperature cracks are reduced, and the gravity dam construction requirement is met.

The novel geomembrane double-track sweat soldering process comprises the steps that the surface of a reservoir bottom is subjected to leveling and roughening treatment, so that the roughness depth of the surface of the reservoir bottom is 3-5 mm; cutting the geomembrane into proper sizes, numbering and recording the geomembrane piece by piece, and pressing and covering the exposed edge of the geomembrane through a sand bag; the TPO geomembrane, the novel geomembrane and the HDPE geomembrane are in lap joint in sequence in a staggered mode and welded through a double-track automatic hot melting welding machine, and the edges of the adjacent geomembranes are fused; marking the detected defects on the geomembrane, and arranging repair until the retest is qualified; the novel geomembrane comprises a base material layer and an anti-skid layer, the lower surface of the base material layer is coated with the anti-skid layer, and the thickness ratio of the base material layer to the anti-skid layer is 1: (0.1-0.3). The frosted surface of the novel geomembrane can be tightly attached to the rough surface of the reservoir bottom, the frosted surface and the rough surface are not prone to relative sliding, the service life of the geomembrane is prolonged, and the engineering anti-seepage requirement is met.

The invention relates to the technical field of special cables, in particular to an anti-electromagnetic interference double-shielding signal cable for precise instruments, which comprises conductor units, insulating layers, wire pair shielding layers, a filling buffer layer, a self-adaptive conductive layer, an inner main shielding layer, a bonding layer, an outer main shielding layer and a sheath layer, through combination of the graphene composite conductor and the low-dielectric insulating layer, 10GHz signal attenuation is smaller than or equal to 0.5 dB / m, signal transmission errors are greatly reduced, through cooperation of the 3D braided shielding layer and the filling buffer structure, the bending fatigue life of the signal cable is larger than or equal to 200,000 times, through self-repairing design of the liquid metal microcapsules, the shielding effectiveness of a damaged part is recovered, and the service life of the signal cable is prolonged. Protrusions are arranged on the inner layer, form mechanical occlusion with a microscopic rough surface of a copper foil composite layer on the inner main shielding layer, and are matched with a plurality of pits in the surface of the outer layer to form point-surface composite contact with a 3D woven silver-plated copper wire layer of the outer main shielding layer, so that the peel strength of the inner main shielding layer and the outer main shielding layer is greatly improved.

The invention provides a resin material and a preparation method and application thereof, and relates to the technical field of batteries, the resin material comprises spherical resin particles, the surface contains rough and smooth areas, and the ratio of the sum of the areas of the smooth areas to the surface area of the smooth particles with the same diameter is defined as a smooth coefficient. The average value of the smoothness coefficients of the spherical resin particles in the resin material, namely the smoothness coefficient S1, is 0.0-80.0%. The resin material can be prepared by adding resin, a roughening agent and an optional curing agent into water containing an emulsifier and carrying out solid-liquid separation after the reaction is finished. A spherical carbon material with a rough surface can be obtained by carbonizing the resin material, and a spherical silicon-carbon composite material with a rough surface can be prepared by taking the carbon material as a framework and is used for a negative electrode and a battery; the problem that in the prior art, the circulation stability of spherical silicon-carbon negative electrode particles is poor due to the fact that active substances are prone to being separated from electric contact in the charging and discharging circulation of the lithium ion secondary battery can be solved.

The invention discloses a production method of an ultrathin copper foil with high tensile strength and high elongation, which applies a synergistic effect of chloride ions, a leveling agent, an inhibitor, a brightener and a sulfur-containing additive, so that crystal grains are more compact, and the copper foil is smoother, brighter, finer and more uniform in SEM (scanning electron microscope) observation. And data measured by a tension test can show that the tensile strength and the ductility are remarkably improved through the synergistic effect of several additives. The thickness of the copper foil prepared by the production method disclosed by the invention is 4 # imgabs 0 # and 12 # imgabs 1 # m, the rough surface roughness Ra is (0.04-0.46) # imgabs 2 # m, the Rz is (0.66 # imgabs 3 # 1.63) # imgabs 4 # m, and the tensile strength is 650 # imgabs 5 # 950 MPa.

The invention relates to the technical field of electrolytic copper foil processing, and particularly provides a method for reducing the rough surface roughness of an HVLP copper foil by using a composite additive, which comprises the following steps: step (1): enabling the composite additive to flow into a high-level tank through an additive flow pump, uniformly mixing the composite additive with a copper sulfate electrolyte, and enabling the mixture to flow into a crude foil machine; step (2), then adjusting process parameters of a crude foil machine, including current and line speed of a cathode roller; (3) foil generation and foil drawing are carried out; the composite additive comprises one or two of gelatin and collagen. One or more composite additives composed of gelatin, collagen, sodium dithiodipropane sulfonate, N, N-dimethyl-dithioformamide sodium propanesulfonate, 3-sulfydryl-1-sodium propane sulfonate, hydroxyethyl cellulose and polyethylene glycol are added into the raw foil electrolyte, so that the copper electrodeposition reaction potential can be effectively changed; and uniform and compact copper crystallization peaks are obtained, the rough surface roughness of the raw foil is reduced, and the uniformity of a plating layer is improved.

The invention belongs to the technical field of gear transmission system fault diagnosis, and particularly relates to a gear pitting kinetic model solving method based on microscopic surface topography. Comprising the following steps: establishing a tooth surface morphology and pitting defect model; the tooth surface morphology of the selected gear is sampled, and nonlinear excitation parameters in a gear transmission system are collected; a gear tooth surface morphology mathematical model based on the fractal dimension D and the fractal roughness G is established, and a mixed elastohydrodynamic lubrication coupling analysis mathematical model of the pitted gear under the rough surface is established based on the relation that the curvature radius, the dynamic load, the oil film entrainment speed and the like change along with the change of the meshing position under different surface roughness. And solving the non-linear dynamic mathematical model of the gear with the rough surface. According to the method, the influence of the surface roughness on the rigidity attenuation and pitting extension of the gear can be accurately quantified, the nonlinear dynamic behavior of the gear system under the complex lubrication condition is disclosed, and an analysis method support is provided for the pitting resistance design and life prediction of the gear.

A composite membrane for desalination includes a polyethylene terephthalate (PET) nonwoven layer having a fibrous structure, and has an average thickness of about 30 to 200 micrometers (μm). A polysulfone (PS) layer having an average thickness of about 30 to 100 μm is disposed on a surface of the PET nonwoven layer. Further, a polyamide layer is disposed on a surface of the PS layer including reacted units of an acyl compound, a phenylenediamine monomer, and a poly-(DADMAC-co-DADA). The polyamide layer has a rough surface including a plurality of irregular-sized ridge-and-valley structures of polyamide. The poly-(DADMAC-co-DADA) has a formula (I), and n is a positive integer.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.