30results about How to "Effective guidance design" patented technology

The invention discloses an analytical method for a contact performance of a junction surface containing a microcosmic surface shape. According to the analytical method, the gridding dividing quality and the solving efficiency are increased and the forecasting accuracy and reliability of the contact performance of rough surfaces are improved. The analytical method comprises the following steps: measuring a practical surface through a laser confocal microscopy or obtaining the rough surfaces by utilizing a three-dimensional shape digital simulation method; extracting a height matrix of the shape of each 3D (Three-Dimensional) rough surface; utilizing a point cloud processing method to discretize each 3D rough surface into a height matrix file which is easily extracted by finite element software; importing the height matrix files into the finite element software, thereby generating a microcosmic shape of each connecting surface of the junction surface; establishing body models considering the microcosmic surface shapes by utilizing translation coordinate modifying functions of a key point of the finite element software; performing hexahedron gridding division on each body model according to a gridding control method; establishing finite element contact models in contact with the two 3D rough surfaces; gradually applying displacement and force loading boundary conditions; and analyzing the contact feature of the junction surface.

The invention discloses a shale uniaxial compressive strength evaluation method based on a rock debris micro-nano indentation experiment, and the method comprises the following steps: collecting rockdebris of a target shale reservoir, and treating the surface of a rock debris sample by adopting a three-ion beam cutting instrument, so that the surface becomes a flat and smooth high-quality section; carrying out a rock debris micron or nano indentation experiment on the treated rock debris sample to obtain a plurality of groups of indentation experiment load displacement curve graphs; and calculating the shale uniaxial compressive strength of the shale reservoir. According to the method, the shale debris micro-nano indentation experiment is carried out, indentation load depth curves under different scales are obtained, micromechanics parameters of shale are obtained through calculation, a relation model between uniaxial compressive strength and the micromechanics parameters is established, prediction of macromechanics parameters of shale is achieved, and the method is suitable for large-scale popularization and application. Therefore, shale mechanical parameters of the shale horizontal well are accurately obtained; basic parameter bases are provided for drilling, well completion and hydraulic fracturing of the shale gas horizontal well, and design and construction of drilling, well completion and hydraulic fracturing of the shale gas horizontal well can be effectively guided.

The invention relates to a prediction technology of a leakage rate of an existing contact mechanical seal. By utilizing a seal interface topography evolvement rule in the wear process of a movable ring and a stationary ring, and a contact compression stress variation rule of primary and secondary seal interfaces due to the wear-down of the movable ring and the stationary ring and the stress relaxation of an O-shaped ring, the topography parameters of the seal interfaces and loads on the movable ring and the stationary ring seal interfaces, the O-shaped ring and the internal diameter and external diameter contact interfaces of the O-shaped ring are determined after the mechanical seal runs for a certain time, and the characteristic sizes of percolation channels between the movable ring and the stationary ring seal interfaces and the O-shaped ring and the internal diameter and external diameter contact interfaces of the O-shaped ring are obtained by a percolation theory, a contact mechanics theory and a fractal theory at the moment, the effect of surface tension and centrifugal force of the sealed medium is considered, and then the leakage state of the existing contact mechanical seal is predicated by a Navier-Stokes equation. The method is simple and practical, the accident problems caused by frequent replacement or expiration of the mechanical seal can be effectively solved, and the safety and reliability of equipment are improved.

The invention discloses a mortise broaching process simulation analysis method based on thermal force flow multi-field coupling. The method comprises the steps of creating a broaching thermal force model according to the sizes of a cutter and a workpiece, material related parameters, cutting related parameters and heat conduction characteristics, and making analog simulation; establishing a broaching heat flow model according to the cooling related parameters of the cutter, the workpiece and the cooling liquid, and performing analog simulation; and coupling the simulation results of the broaching thermal force model and the broaching thermal flow model to obtain a broaching thermal force flow multi-field coupling model, and simulating the cooling effect of the cooling liquid on the workpiece, the cutter and the cuttings in the broaching process. The thermal force and thermal flow simulation analysis model in the broaching process is established, a data transmission platform among the models is established, coupling simulation analysis among three fields of broaching thermal force flow is achieved, the flow speed, temperature and impact pressure of cooling liquid are fully considered, and simulation precision is greatly improved.

The invention discloses a novel sensitive coating prepared from, by weight, 30-50 parts of organic silicon modified epoxy acrylic acid, 0.2 parts of cobalt oxide crystal, 2 parts of water, 3-5 parts of nano cellulose filament, 60 parts of bismuth vanadate, 20-30 parts of polyvinyl alcohol, 18 parts of aluminum oxide, 12 parts of sepiolite powder, 20-30 parts of talcum powder, 20 parts of mica powder, 6-10 parts of organic silicon coupling agent, 20-30 parts of xylene, 2-4 parts of a dispersant, 1-3 parts of an anti-settling agent, 3-5 parts of a defoamer, and 0.2 parts of Bi2WO6.

The invention discloses a test platform and a test method for an extra-high-voltage direct-current deep well grounding electrode. The test platform comprises an equal-ratio scaling deep well groundingsystem, an isolated direct-current power supply, a measurement control system, a current test wire, a voltage test wire and a remote temporary grounding electrode, wherein one end of the isolated direct-current power supply is connected with the equal-ratio scaling deep well grounding system, and the other end is connected with a remote temporary grounding electrode through a current test wire and a voltage test wire to simulate the operation condition of single-pole grounding of an extra-high voltage direct-current transmission line. The measurement control system is used for monitoring operating parameters in the equal-ratio scaling deep well grounding system, wherein the operating parameters comprise current and temperature. According to the invention, a loop is formed between the equal-ratio scaling deep well grounding system and the remote temporary grounding electrode through the ground so as to simulate the operation condition of single-pole grounding of the extra-high voltagedirect current transmission line, and experimental research can be actually carried out on the grounding of the extra-high voltage direct current deep well grounding electrode.

The invention discloses a high-concentration tailing filling slurry stirring process optimization method, and belongs to the technical field of mine filling. The method comprises the following steps:1) preliminarily determining a stirring process; 2) constructing a solid three-dimensional model; 3) calibrating simulation parameters; 4) performing simulation run of the stirring process; 5) analyzing and evaluating a simulation result; and 6) optimizing and determining the stirring process. According to the method, discrete elements are coupled with smooth particle hydromechanics (DEM-SPH), stirring simulation of a full-size device and a whole process is carried out, the stirring uniformity is analyzed and evaluated on the basis of the change rule of the concentrations of the tailing particles and the cementing material particles at the outlet hole changing along with time, the stirring process of the high-concentration tailing filling slurry is accurately optimized, the strength of a filling body and the good conveying performance of the filling slurry are guaranteed, design and industrial tests are effectively guided, investment is saved, efficiency is improved, and cost is reduced.

The invention provides an air-conditioner installation simulating and testing table which comprises a support structure, a middle shelf and an installing shelf, wherein the middle shelf is rotationally connected with the support structure through a rotary shaft which extends along a first direction; the installing shelf is rotationally connected with the middle shelf through a middle shaft which extends along the second direction; and an inner unit installing part for installing an inner unit of an air-conditioner to be tested is installed on the installing shelf. With the adoption of the air-conditioner installation simulating and testing table, various installation angles of the inner unit of the air-conditioner can be set, various after-sale installation conditions of the air-conditioner can be simulated and tested, the design can be instructed effectively, and the after-sale fault rate is reduced.

The invention discloses a cabin butt-joint bolt connection looseness simulation method under basic excitation. The method comprises the following steps: S1, establishing a 3D geometric model of a cabin butt-joint bolt connection structure; S2, establishing a finite element model of the bolt connection structure according to the 3D geometric model of the bolt connection structure; and S3, carryingout contact finite element modeling according to the finite element model of the bolt connection structure, and carrying out bolt connection looseness simulation calculation. According to the cabin butt-joint bolt connection looseness simulation method under basic excitation, the phenomenon that a pre-tightening force is reduced in a cabin butt-joint bolt connection looseness process is simulatedthrough the simulation method, and the design of a cabin butt-joint bolt connection structure under basic excitation can be effectively guided.

The invention provides a direct-current support capacitor parasitic inductance measuring method and device and a readable storage medium, and relates to the field of direct-current support capacitors, and the method comprises the steps: calculating first parasitic inductance of an output port of an insulated gate bipolar transistor in a loop through a finite element algorithm; calculating second parasitic inductance of the copper bar through a finite element algorithm; and calculating third parasitic inductance of the direct current support capacitor according to the first parasitic inductance and the second parasitic inductance. According to the method for measuring the parasitic inductance of the direct-current support capacitor, the parasitic inductance of the direct-current support capacitor is measured before product production through short circuit of the direct-current support capacitor by the copper bar, so that the copper bar design of a film capacitor can be effectively guided, the loop inductance of an insulated gate bipolar transistor (IGBT) can be controlled, and the design target can be accurately achieved; the copper bar design is improved according to the design target, and parasitic inductance optimization is carried out.

The invention relates to a rock strength parameter testing method based on a rock debris nano-micron indentation experiment, and belongs to the technical field of oil exploration and development. According to the rock strength parameter testing method based on the rock debris nano-micron indentation experiment, the rock debris nano-micron indentation experiment is carried out, and an indentation load-depth curve under the nano-micron scale is obtained; the triangular pyramid Berkov indentation hardness, the rectangular pyramid cubic corner indentation hardness, the internal friction angle, the cohesive force, the uniaxial strength and the tensile strength of the rock are obtained, and prediction of rock strength parameters is achieved. The rock debris nanometer or micrometer press-in experiment is carried out, a press-in load-depth curve under the nanometer or micrometer scale is obtained, the relationship among the hardness, the internal friction angle, the cohesive force, the uniaxial strength and the tensile strength of the rock is obtained through calculation, and prediction of rock strength parameters is achieved. Basic parameter basis can be provided for oil and gas well drilling, well completion and hydraulic fracturing, and well drilling, well completion and hydraulic fracturing design and construction can be effectively guided.

The invention discloses an integrated circuit modeling acquisition method and system based on an abstract syntax tree, and belongs to the technical field of integrated circuit design. The method comprises the following steps: acquiring a Verilog HDL source code project file of the large-scale integrated circuit, and extracting .V files with a mutual dependency relationship; analyzing the .V file into an abstract syntax tree, and exporting the abstract syntax tree into a .Json file; traversing the file meeting the standard json format to obtain data information, and storing the data information into a data structure; and analyzing the data structure to obtain an analysis result, and exporting the analysis result as a TXT file. Due to the fact that the abstract syntax tree does not depend on specific grammar and language details, after the source code is converted into the abstract syntax tree, many operations can be conducted on the abstract syntax tree, and then the flexibility and efficiency of modeling design of a super-large-scale integrated circuit can be improved.