63 results about "Real structure" patented technology

The invention provides an integrated Phased Array (PhA) structural radar transducer, permanently bonded to a structure, that can provide reliable electromechanical connection with corresponding miniaturized electronic SHM device installed above it. The integrated PhA transducer consists of a set of aligned piezo-electric discs with wrap around electrodes for transceiving of elastic ultrasonic waves, plurality of electrical traces and contact pads, several layers of a flexible printed circuit board, electromagnetic shielding between channels and overall, one electromechanical multi-pinned connector and all that integrated into one small unit easy for surface installation by bonding and final application on real structures. The integrated PhA transducer, as a key component of SHM (Phased Array Monitoring for Enhanced Life Assessment) system, has two principal tasks to reliably transceive elastic waves and serve as a reliable sole carrier or support for associated sophisticated SHM electronic device attached above.

The invention provides a method for reconstructing a micro structure finite element of a multiphase material based on a sequence image, comprising the following steps of: on the basis of collecting, reading and interpolating the sequence image of the material, establishing a finite element topology model forming a mapping relation with the sequence image; using configuration information of the image and a topology structure of the model to determine a node and unit information; and then using a statistical average value of colour information in the image to determine material attributes of each unit of the finite element model. The method disclosed by the invention not only can be used for reconstructing a two-dimensional quadrangular finite element model reflecting a real structure of a material section through a single image, but can also be used for directly reconstructing a three-dimensional hexahedral finite element model reflecting the real structure of the material through the sequence image. By means of the invention, error accumulation in the links of reconstructing, grid dividing and the like in the current geometrical reconfiguration method can be avoided; the reconfiguration time is greatly saved; and the reconfiguration efficiency is improved. The method disclosed by the invention can be widely used in the fields, such as macro-micro cross scale research, optimization design and preparation of the multiphase material.

The invention provides a finite element modeling method based on a real material microstructure. According to the method, various kinds of digital image technical processing are carried out on SEM scanned pictures, conversion from bitmaps to vector diagrams is achieved, and accordingly the real material microstructure can be mapped into a two-dimensional finite element model. By means of threshold segmentation, gray processing, binarization processing, repeated switch-off and switch-on operations and the technology converting the bitmaps into the vector diagrams, defects presented in the images or reinforcements are clearly segmented from a substrate, and besides attributes of the defects or the reinforcements can be respectively defined in finite element software. According to the method, a high-precision finite element model of the real material microstructure is built directly through the SEM pictures, a digital model is close to a real structure, and authenticity of the finite element model in the calculation process and in calculation results is improved. The method can be widely used in the field of optimization design field taking the defects and heterogeneous material performance judgment into consideration.

A small aircraft engine multi-point rubbing fault simulation experiment device includes a rotor system, a drive system, a rubbing system, a support system, and a measurement and control system. The rotor system adopts a centrifugal compressor and a leaf disc integrated structure axial flow turbine, which is consistent with the real structure of the small aircraft engine; the drive system includesa motor, a speed increaser and a magnetic powder brake; the rubbing system includes a compressor rubbing structure, a turbine rubbing structure and a rotating shaft rubbing structure, wherein each structure is an independent structure, and the structures can be combined with each other to realize multi-position and multi-modal coupling rubbing; the measurement and control system includes a motor rotating speed controller, a motor comprehensive protector, a data collector, a displacement sensor and a vibration acceleration sensor, wherein the motor comprehensive protector can prevent damage tothe motor under a high load. The invention can realistically simulate multi-type rubbing faults of the small aircraft engine rotor system at multiple locations, and can be used to study the vibrationresponse of the small aircraft engine under a plurality of frictional coupling effects.

The invention discloses a vehicle-bridge coupling power experimental model device, and belongs to the technical field of railroad bridge engineering. The experimental model device consists of a model vehicle and a model bridge, wherein the model bridge comprises a multi-span continuous beam, a bridge pier, an acceleration section and a deceleration section. The model vehicle is processed according to the size and structure of a real vehicle. The vehicle is pulled to different positions and heights of the acceleration section by an electric motor, and then is released by power down so as to ensure that the vehicle passes through the bridge at different speeds. The deceleration section is provided with a two-stage deceleration device to consume the kinetic energy of the vehicle, and simultaneously, in order to prevent the vehicle from rebounding, the end part of the deceleration section is provided with an anti-rebounding device. By using the experimental model device, the real structures of the vehicle and the bridge can be known, and the power coupling action process between the vehicle and the bridge when the vehicle passes through the bridge can be simulated.

The invention relates to a sensor setup method capable of supporting failure prediction. The method is technically characterized by comprising two steps: sensor number optimization and sensor location optimization: firstly, performing the sensor number optimization step: obtaining a minimum acceleration peak value of a signal according to parameters of an instrument, obtaining an incident wave propagation limit distance threshold according to a wave amplitude attenuation formula of incident wave and obtaining the minimum number n of the required sensors; and then obtaining the sensor arrangement location by a finite element model, and adjusting the number and the location of the sensors according to the incident wave propagation limit distance threshold. The method can help realize that parameter information which reflects real structure state is maximally obtained with the minimum sensor number. The method adapts to setup complexity of the sensors for structural health monitoring and damage detection, and can better meet the needs of the actual engineering application. The invention can provide a sensor setup standard for the structural damage detection and the structural health monitoring; and help configure a detection system or a monitoring system more economically and reasonably.

The invention discloses a new method of efficiency calibration without a radioactive source for a gamma detector. The method comprises the following steps: with a given detector structure parameter range (comprising geometric sizes such as a crystal dead layer) as an initial value range, Monte_Carlo calculation and comparison with an experimental measurement result are used to obtain real structure parameters of the detector; according to the real structure parameters, a Monte_Carlo or discrete ordinates (SN) method is used for calculating full-energy peak detection efficiency of rays with specific energy emitted by a point source from any angle on the surface of the detector in the detector, and thus, the detector is characterized; and by using the characterized result of the detector, a numerical integration method is used for calculating the full-energy peak detection efficiency of multiple energy points of any gamma radiation source (a body source, a surface source and a point source), and a detection efficiency calibration curve is fit according to the detection efficiency of the multiple energy points. The new method of efficiency calibration without a radioactive source for the gamma detector provided by the invention has the advantages that the measurement workload is small, the calculation precision is high, the body source position is not limited and the like.

A method of analyzing a tube system in particular by image processing of images of the tube system is provided by the present invention. In order to achieve a simulation of a medium flow through a calculated tube model, the present invention gathers a tube model from a specific tube data set. By defining the necessary parameters of a virtual injection of the medium by the user, the medium flows through the model. Using this displayed simulation for generating at least two images leads to an artificial image sequence that might support a person, which wants to examine a real structure, that corresponds to the calculated model. This might be seen in.

The invention relates to a stereolithography-based process for manufacturing the porous structure of a bionic scaffold. The process comprises the following steps: scanning natural bones by Micro-CT to acquire the micro-structural model of the natural bones; further acquiring the negative-type model thereof through the Boolean operation; then, acquiring the negative-type model on a stereolithography basis; and finally pouring bioceramic slurry followed by high-temperature calcinations to obtain the controllable porous structure of the bionic scaffold. The porous structure of the bionic scaffold prepared by the method is the same as the real structure of bones; moreover, the method is even more favorable for the adhesion, creeping and osteogenesis substitution of cells.

Method for object marking using a three-dimensional surface inspection system using two-dimensional recordings and method by simple recording of two-dimensional images of a component and comparing the images with a known three-dimensional model for enabling the three-dimensional real structure of a component to be captured using best fit. Photographing measuring points in a measuring point pattern and orienting the component with reference to markers at the points enables orienting the two-dimensional images with the three-dimensional model.

The invention discloses a detachable novel truss node testing device belonging to the field of structural engineering in civil engineering. The detachable novel truss node testing device comprises a main body (1) of the testing device and a truss node (2) to be tested, wherein the main body (1) of the testing device is connected with the truss node (2) to be tested through flanges (4) and flanges (6); a chord member (3) of the node is connected with a main bar (9) of the device by the flanges (4) through bolts; web members (5) of the node are connected with branch bars (10) of the device by the flanges (6) through bolts; a chord member load sensor (7) is distributed at one end part of the chord member (3) of the node; and web member load sensors (8) are distributed at the end parts of the web members (5) of the node. Through applying a simple unidirectional load to the main body (1) of the testing device, multiple boundary conditions can be applied to the truss node (2) to be tested through each connecting bar, so as to simulate the forced state of the truss node (2) to be tested in a real structure. The device can clearly transmit force, is simple and convenient to operate, is economic and reliable, and can be repeatedly utilized.

The three-dimensional real structure of a component can be captured by means of best fit by simply recording two-dimensional images and comparing a known three-dimensional model. A component is placed on a measurement stage having reference marks and is photographed several times in two-dimensions. The photo recordings are compared with a three-dimensional model of the component. A three-dimensional model is produced using best fit of the two-dimensional recordings and the stored model.

The invention relates to a power system, in particular to an atomic motion simulator for automatically making circumferential rotation motion without external energy or power. The known structure of an atom comprises an atomic nucleus, protons, electrons, neutrons, and the like, but the real structure inside the atom and perpetual generating mechanism inside the atomic nucleus cannot be known. The atomic motion simulator can help human beings to know the perpetual mechanism inside the atom and provide new methods for acquiring infinite clean energy and power.

The invention discloses a knowledge graph embedding method based on attribute aggregation and a storage medium thereof. The method comprises the following steps: aggregating attributes in a knowledgegraph and converting the aggregated attributes into entities; all positive examples are formed by utilizing triple groups existing in a knowledge graph, a positive example training data set O+ is formed, a value domain class inverse example and a relation class inverse example are constructed, and an inverse example training data set O- is formed; and establishing a knowledge graph embedded objective function, and solving the objective function by using the training data formed in the previous step. According to the method, attributes are converted into entities through attribute aggregation,and then the knowledge graph is embedded, so that loss of attribute information in a knowledge graph embedding result is prevented. According to the method, a value domain type inverse case construction method based on a relation value domain and a relation type inverse case construction method based on a type relation domain are adopted, so that the probability of occurrence of false inverse cases is reduced, the quality of a training sample is improved, and the consistency of a knowledge graph embedding result and a knowledge graph real structure is indirectly improved.

The invention belongs to a measuring technology and especially relates to an evaluating method for engineering applicability of a fiber bragg grating strain sensor. The evaluating method comprises a functional test step and a durability test step. According to the evaluating method, the operation is convenient and fast. The evaluating method is characterized in that: specific to the practical engineering application, a real structure is adopted for performing experimental verification on the engineering applicability. Compared with a more mature and wide resistance strain gauge of the present engineering application, the evaluating method has the advantages that the engineering applicability is evaluated through the test, the technical maturity and the existing main problems of the fiber bragg grating strain sensor are deeply known, the reliable and effective data is supplied for improving the strain sensor, gradually increasing the technical maturity of the engineering application, guiding the fiber bragg grating strain sensor to an engineering practical stage from a laboratory stage, realizing the sensing engineering application capability, meeting the demand of the engineering application and monitoring the structural health on the basis of a sensor technology, and a powerful support is supplied to the wide engineering application of the fiber bragg grating strain sensor and the development of a monitoring sensing technology.

The present invention relates to a manned submersible simulation system, which comprises a manned submersible simulation body, a data simulation platform and a visual simulation system, wherein systems are interconnected through a high-speed Ethernet switch; the manned submersible simulation body is used to simulate the real structure of the Jiaolong manned submersible, and includes the external dimension, the in-cabin environment and the operating system as same as that of the real submersible; the data simulation platform is used to produce sensing detection data obtained by all kinds of sensors of the Jiaolong manned submersible and provide a simulated digital environment for the in-cabin control system of the simulation body; and based on the real images of the seafloor captured by the Jiaolong manned submersible in diving, the visual simulation system constructs three kinds of seafloor simulation visual environments of the seafloor hydrothermal vent activity area, the seamount range area and the sea basin polymetallic nodule area, and achieves the movement and transformation of the seafloor scene through the movement instructions of the in-cabin control system.

The invention discloses a heat transfer simulation method based on the fabric geometric structure. According to the heat transfer simulation method based on the fabric geometric structure, a fabric three-dimensional simulation model is built according to fabric parameters, the fabric model is simulated with a finite element method, and the characteristic that the temperature in fabric in the heated state changes along with time is simulated. Due to the heat transfer simulation method based on the fabric geometric structure, fabric transfer simulation becomes simple, and in the simulation process, the changes of the temperature in the fabric along with time can be obtained just by inputting the characteristics of the fabric material and a simulated environment. Compared with the existing simulation methods, the heat transfer simulation method based on the fabric geometric structure is on the basis of the real structure of the fabric, the defect that fabric is simplified to a homogeneous panel is overcome, and under the same conditions, the simulation result coincides with an experiment result. A fabric heat transfer image simulated with the method is very real, and the method is simple. Through the heat transfer simulation method based on the fabric geometric structure, the real structure of the fabric can be shown.

The invention discloses a numerical simulation method of a flexible rolling and forming process of a curved-surface part. The numerical simulation method comprises the following steps: acquiring material attribute parameters of a roller and a sheet material; determining geometric parameters of the roller, the sheet material and a control unit; establishing a geometric model of the roller, the sheet material and the control unit by utilizing a three-dimensional drawing software; acquiring technological parameters of flexible rolling and forming of the curved-surface part; establishing a finite-element analysis model; carrying out simulation analysis of the rolling and forming of the curved-surface part; identifying the accuracy of the finite-element analysis model. According to the method disclosed by the invention, the roller is set to be an elastic body, and elastic deformation of the roller and elastic-plastic deformation of the sheet material are coupled; the control unit is additionally arranged and is used for controlling a roller type of the roller; movement coupling constraint is arranged on the end face of the roller so that the roller rotates around the bent axis of the roller. The numerical simulation method disclosed by the invention reflects a real structure of a forming device and the rolling and forming process of the curved-surface part can be accurately simulated; the numerical simulation method has relatively high precision and efficiency, and evidences can be provided for designing and optimizing a flexible rolling and forming technology of the curved-surface part.

The invention discloses a flanging finite element modeling method. The flanging finite element modeling method comprises the steps of conducting finite element modeling to the inner edge of a flanging to obtain inner edge grids; conducting finite element modeling to the outer edge of the flange to obtain a first layer of outer edge grids and a second layer of outer edge grids; and conducting finite element modeling to the outer edge bending portion of the flanging to obtain a bending unit, and conducting finite element modeling to folding glue between the inner edge and the outer edge to obtain a folding glue unit. According to the flanging finite element modeling method, the real structure of the flanging can be accurately reflected, and reliable support is supplied to optimization and improvement of the flanging.

The invention provides an integrated Phased Array (PhA) structural radar transducer, permanently bonded to a structure, that can provide reliable electromechanical connection with corresponding miniaturized electronic SHM device installed above it. The integrated PhA transducer consists of a set of aligned piezo-electric discs with wrap around electrodes for transceiving of elastic ultrasonic waves, plurality of electrical traces and contact pads, several layers of a flexible printed circuit board, electromagnetic shielding between channels and overall, one electromechanical multi-pinned connector and all that integrated into one small unit easy for surface installation by bonding and final application on real structures. The integrated PhA transducer, as a key component of SHM (Phased Array Monitoring for Enhanced Life Assessment) system, has two principal tasks to reliably transceive elastic waves and serve as a reliable sole carrier or support for associated sophisticated SHM electronic device attached above.

The invention relates to a Parameter classification-step model correction method based on sensitivity analysis. The invention discloses a step-by-step model correction method, belongs to the technicalfield of model correction, and solves the problem of model correction of a reinforced concrete T-shaped section simply supported beam comprehensively considering static and dynamic responses. The method comprises the following steps: S1, establishing a simply supported beam finite element model: establishing a three-dimensional space model by using a separated modeling method; S2, selecting correction parameters, including the following steps: S21, parameter primary selection; and S22, sensitivity analysis. S3, parameter classification based on sensitivity analysis. The step-by-step correction strategy comprises the following small steps: S31, global correction; and S32, local correction. According to the method, mutual restriction and mutual influence of different response residual termsin the correction process are reduced to a great extent, the corrected model can accurately reflect the static and dynamic response of the real structure, and the corrected physical parameters and boundary conditions are basically consistent with the real structure.

The invention discloses a bridge detection method based on a POS system, and the method comprises the steps: installing the POS system on a measurement carrier according to the line form detection requirements of a bridge, and building a bridge axis coordinate system and a measurement coordinate system; planning a measurement path with the reference of the number of lanes of a to-be-detected bridge and a line form structure, and designing a measurement speed; obtaining the detection discrete line form on the measurement system based on the POS system according to the attitude angle and position of the measurement carrier in a navigation coordinate system; carrying out the error analysis and preprocessing of the detection discrete line form, and obtaining a preprocessing discrete line form; finally converting the preprocessing discrete line form into the bridge axis coordinate system through a conversion formula, and obtaining a POS detection line chart reflecting the real structure of the bridge. The method can achieve the quick and accurate measurement of the deformation position and quantity of the bridge, wherein the measurement precision can reach a millimeter level. The method can achieve the high-precision detection of the line form of the bridge structure.

The invention discloses a simulation analysis method for researching a tab structure of a spirally wound lithium ion power battery. The method comprises the following steps of preparing a battery sample, and testing charge / discharge performance data of first circle; building a battery finite element model, setting a physical field, a solving domain and material attribute information, and performing grid division; adding an initial value, a boundary condition and subsequent grid division of the model; putting the battery into an incubator with a temperature of 25 DEG C for performing related charge / discharge testing, thereby correcting key parameters of the model and realizing simulation result verification of the model; and based on the accurately verified model, performing optimization design research on the tab structure of the battery. The method has the beneficial effects that a real structure is replaced with multiple line segments, so that the subsequently divided grid quantity is reduced, and the solving quantity of the model is reduced. In addition, the invention provides a position confirmation method for a tab in spirally wound geometry.

The invention discloses a zirconium alloy EBSD sample preparation method, which comprises: cutting a zirconium alloy sample block, carrying out chemical polishing by using a chemical polishing agent formed by mixing a lactic acid solution, a nitric acid solution and a hydrofluoric acid solution, rinsing with water, and carrying out blow drying with cold wind to obtain the zirconium alloy EBSD sample. According to the present invention, with the preparation method, the problems of complex process, long polishing time, poor effect and the like of the sample preparation technology in the prior art are solved; the preparation method of the present invention is suitable for the preparation of various zirconium alloy EBSD samples with any shapes and any sizes, has characteristics of less grinding step, simple and convenient chemical polishing operation and rapid and efficient sample preparation, and can be used at the room temperature; and the finally prepared sample has characteristics of real structure and good clarity, wherein the EBSD zirconium calibration rate is more than 90%.

Embodiments of the present invention provide a method and apparatus for simulating a metal mask. The method comprises the following steps: dividing the evaporation region of the metal mask into an n-layer plate model with n being 2-6; with n-layer plate model taken as a composite shell structure, carrying out the mechanical simulation through a finite element algorithm, and obtaining the simulation result. A metal mask is divided into a plurality of plate-shaped models, therefore, the model can accurately simulate the real structure of the metal mask, greatly save the design cost, shorten theproduct development cycle, and obtain accurate simulation results, which can be used to guide the design of the metal mask and the mesh stretching process design.

The invention provides a random parameter structure reliability evaluation method based on a point collocation algorithm and relates to the technical field of engineering structure reliability analysis. The method includes steps: for an engineering structure design problem having multiple independent random variables, building a structure performance function containing random parameters; building an equivalent weak form of integration of the structure performance function to acquire a unitary substitution equation of a real structure performance function; determining structure performance function statistics including average value, variance and similar expressions of high-order original moment and central moment; performing point collocation in a random variable definition domain, and determining a point collocation scheme; determining structure failure probability to evaluate structure reliability. The method takes balance between calculation accuracy and calculation efficiency of the engineering structure reliability problem into comprehensive consideration, and the structure failure probability is given out on the basis of a unitary equivalent integration weak form of the structure performance function and a point collocation method, so that model errors caused by normal assumption of random response are reduced.

The invention belongs to the field of aircraft engine shaft component structural strength testing, and particularly relates to an aircraft engine shaft component supporting stiffness simulator. By adopting the hollow cylindrical birdcage-shaped structure, the stiffness simulator is of a vertical stacked structure and is composed of an upper bearing pedestal, a lower bearing pedestal and a connecting bolt; the internal structure shape and size of the stiffness simulator are determined by the real structure of an aircraft engine shaft component, the real structures of bearings of an aircraft engine shafts and accessories, and the machining and assembling technologies are reserved; the external hollow structural shape and size of the stiffness stimulator are optimized and designed by a largefinite element software optimization design module according to the required geometric characteristic parameters. It is ensured that the enough axial stiffness is achieved while the radial stiffness of the simulator is lowered, and testing errors are eliminated.

The invention discloses a calculating method for pedal force characteristics of a motor vehicle clutch. The method includes the following steps: step 1: obtaining the main parameter of each componentof a clutch hydraulic operating system; step 2: establishing a pedal mechanism model, a hydraulic system model and a clutch assembly model through the transmission route of pedal force and stroke andthe work principle of the clutch hydraulic operating system; step 3: installing a force sensor and a displacement sensor and obtaining input data; step 4: performing kinetics and mechanics analysis oneach model, and finally obtaining the characteristic curve line of the pedal force. The real structure design can be effectively guided, the work time and cost of real design are greatly reduced, andthe reliability of design is guaranteed.

The invention relates to a cell culture method for improving the hepatocyte proliferation activity. The method comprises the following step: co-culturing hepatocyte, vascular endothelial cells and adipose-derived stem cells in a co-culture medium for 3 days or over 3 days according to a ratio of 14: (2 to 4): (2 to 4). The cell culture method disclosed by the invention has the beneficial effect mainly reflected in that a real structure and function of hepatocyte in vivo can be well simulated by adopting the cell culture method, and the activity of the cultured hepatocyte can well maintain the function and activity of the hepatocyte in vitro.

Method for object marking using a three-dimensional surface inspection system using two-dimensional recordings and method by simple recording of two-dimensional images of a component and comparing the images with a known three-dimensional model for enabling the three-dimensional real structure of a component to be captured using best fit. Photographing measuring points in a measuring point pattern and orienting the component with reference to markers at the points enables orienting the two-dimensional images with the three-dimensional model.