637 results about "Field simulation" patented technology

The invention relates to a slope water-soil loss experiment device and method under combined extreme meteorological conditions. The experiment device comprises an experiment table, a combined extreme environment simulation unit and a control system unit, wherein the experiment table comprises a bottom base, a slope base plate, a downstream baffle plate, soil block standard elements and an experiment table regulating device; the combined extreme environment simulation unit comprises a rainfall simulation device, an air field simulation device, a freezing rain simulation device, a snowfall simulation device, a sunlight simulation device, an air temperature simulation device and an overland flow simulation device; the control system unit comprises a power supply system, a water supply system and a signal acquisition and processing system. According to the invention, the slope water-soil loss experiment device and method under combined extreme meteorological conditions perform indoor simulation and measurement of a slope water body loss situation under a single or combined extreme meteorological conditions of rain storm, rain and snow, freezing rain, flood, drought, high temperature and the like, can achieve accurate and reliable results, and can be widely applied to water-soil loss monitoring, principle analysis and governance under complex variable meteorological conditions.

The invention discloses a transient temperature field simulation method based on multiple commutation failures of a smoothing reactor. The method comprises the following steps that A, an oil immersed type smoothing reactor three-dimensional geometrical model is built in a solid modeling mode on the basis of ANSYS finite element software; B, an oil immersed type smoothing reactor is subjected to heat generating analysis; C, the oil immersed type smoothing reactor is subjected to heat radiation analysis; D, the boundary conditions of temperature field simulation calculation are determined; E, the steady temperature field of the smoothing reactor under the normal work condition is calculated; F, the obtained steady temperature field result is used as an initial value of a failure transient model, then, the failure current is loaded, a step-length method is adopted, the distribution of the temperature field along with time after the failure is calculated, and the transient temperature field simulation method based on multiple commutation failures of the smoothing reactor is completed. The method has the advantage that basis is provided for checking the maloperation reason of a smoothing reactor gas relay and setting the gas checking setting valve of the smoothing reactor.

The invention provides an air quality fast traceability forecast method based on a Lagrangian transportation model. The method comprises the steps that a mesoscale weather forecasting mode is used to simulate the meteorological field of a simulated area; according to the meteorological field requirements of the Lagrangian transportation model, key elements, which are output by a meteorological field simulation system, of the meteorological field are extracted, and the data format is converted; basic parameters of the Lagrangian transportation model are set; the space-time probability distribution of released particles in the meteorological field is calculated through the Lagrangian transportation model, and a particle probability distribution database is built; the space-time probability distribution of the released particles and a pollution source list in the simulated area are combined to calculate the potential source contribution distribution of pollutants; and finally, statistical simulation is carried out on the calculated pollutant concentration and the contribution of each industry to the pollutant concentration in the pollutant list. According to the invention, the air pollution source of an area and a city can be analyzed and forecasted, and the identification of the key area of pollution contribution and quick response demonstration of and pollution emission reduction measures can be realized.

The invention provides a method for carrying out online automatic accurate amplitude-cutting control on spraying width of secondary cooling water of a wide and thick slab, belonging to the technical field of control over cooling water for continuous casting and aiming at overcoming the defects of large engineering modification of a cooling water supply loop, higher cost or poorer control precision of manually adjusting spraying width and the like existing in the prior art. The method mainly comprises the following steps of: taking secondary cooling water spraying widths of different steel types and different width specifications of casting blanks, which are determined through temperature field simulation computation of secondary cooling water regions of the casting blanks and field tests,as references, driving a guide device mainly consisting of a support frame and a collecting guide pipe to collect and guide out redundant cooling water which is sprayed from spray pipes at edge partsof rows of the inner arc of the sector section so as to realize online accurate amplitude-cutting to spraying width of the secondary cooling water of the inner arc of the sector section. Due to adoption of the method disclosed by the invention, temperature of the corner of a continuous casting blank can be stably controlled at 870-900 DEG C, a third brittleness temperature region of steel is effectively avoided, the micro transverse crack defect rate of the corner of the micro alloy steel continuous casting blank is controlled within 1 percent.

The invention relates to an air pollutant monitoring and early-warning method and an air pollutant monitoring and early-warning cloud platform. The air pollutant monitoring and early-warning cloud platform comprises a data acquisition module, a data processing platform and a communication module, wherein the data acquisition module is used for acquiring a pollutant concentration in the air, a wind direction and a wind speed; the data processing platform is used for acquiring data output by the data acquisition module, adopting a puff orbit model for conducting three-dimensional flow field simulation, correcting error data through utilizing fitted historical pollutant concentration and wind speed monitoring data, predicting a pollutant concentration at a fixed location in future and calculating an air pollution index, and conducting three-dimensional flow field simulation by means of the puff orbit model to obtain pollutant concentration planar distribution by utilizing pollutant concentrations at monitoring points and the wind speed monitoring data for tracking a pollution source precisely; and the communication module is used for connecting a management system in a wired or wireless manner, connecting a user terminal in a wireless manner, and issuing air quality inspection reports, prediction reports, pollutant distribution contour diagrams and possible pollution source locations to the user terminal.

The invention provides a cable-joint cable core temperature inversion method and a cable-joint cable core temperature inversion system on the basis of a surface temperature of a cable. The cable-joint cable core temperature inversion method comprises the following steps: S1, carrying out radial temperature inversion according to a cable one-dimensional transient thermal circuit model and a temperature of a surface temperature measured point of a cable body so as to obtain an inversion transient temperature of a cable core fit point; S2, constructing a cable two-dimensional temperature field simulation module by adopting a finite element temperature field simulation method and simulating transient temperatures of a cable core contact point and the cable core fit point under different loading currents and at different moments so as to obtain a transient temperature simulated data set; S3, using the transient temperature of the cable core contact point as an independent variable, using the transient temperature of the cable core fit point as a dependent variable and carrying out fitting on the transient temperature simulated data set so as to obtain a cable core axial temperature function; S4, combining the inversion transient temperature of the cable core fit point with the cable core axial temperature function to obtain a temperature of the cable core contact point. According to the invention, the accurate temperature of the cable core contact point can be obtained by utilizing the surface temperature of the cable body through inversion and fitting; the cable-joint cable core temperature inversion method and the cable-joint cable core temperature inversion system are simple, convenient and rapid.

The invention discloses a method for achieving adjusting and controlling of titanium alloy beta crystal grains obtained through laser additional material manufacturing. The method comprises the stepsthat a laser additional material manufacturing process window is preliminarily optimized, optimized process parameters are obtained, and under the optimized process window, the temperature field of amolten pool is calculated; the temperature gradient G and the cooling rate xi of the molten pool are extracted, and the G2/xi value is worked out; the beta grain histomorphology is judged according tothe following rules, specifically, when xi is larger than or equal to 3*10<3> and smaller than or equal to 10<5> DEG C and G2/xi is smaller than or equal to 1.2*10<6> DEG C s/m<2>, the beta grains are equiaxial grains, and when xi is smaller than or equal to 3*10<3> DEG C/s and G2/xi is larger than or equal to 3*10<9> DEG C s/m<2>, the beta grains are columnar grains; the main process parameter sections of the equiaxial beta grains and the columnar beta grains are obtained; and finally, laser additional material manufacturing is conducted by adopting the corresponding process parameters, andparts controllable in beta grain histomorphology are obtained. According to the method, through molten pool temperature field simulation and solidification theory combination, achieving adjusting andcontrolling of the beta crystal grains are achieved, and the mechanical property of the formed parts can be effectively improved.

A method of improving the production of a mature gas or oil field, the field comprising a plurality of existing wells, the method comprising the steps of providing a field simulator capable of predicting a production of the field in function of a given scenario, a scenario being a set of data comprising production parameters of the existing wells and, the case may be, location and production parameters of one or more new wells, determining drainage areas of the existing wells using the field simulator, determining locations of candidate new wells such that drainage areas of the candidate new wells, determined using the field simulator, do not overlap with the drainage areas of the existing wells, optimizing the value of a gain function which depends on the field production by determining a set of wells out of a plurality of sets of wells, which optimize the value of said gain function, each set of wells of said plurality of sets of wells comprising the existing wells and new wells selected among the candidate new wells.

The invention provides a simulation method and device of a motor temperature field. The simulation method comprises a three-dimensional model of a motor is established; grid partitioning is conductedon the three-dimensional model, heat-transfer characteristic valuation is conducted on each part of the motor; the sub-loss of each part of the motor is determined according to electromagnetic field distribution and vortex field distribution; the mechanical loss of the motor is determined according to the flowing state of air gap oil bath liquid in the motor and dynamic and static loads of an alignment bearing of the motor; the sub-losses and the mechanical loss are converted into heat generation rates; valuation is conducted on each part of the motor according to material characteristics andthe heat generation rates, and temperature field distribution results of all the parts of the motor are calculated. The temperature change situation of each part in the motor, especially the key part,can be obtained, real-time monitoring and analysis can be conducted on the temperature of each part in the motor, the authenticity and comprehensiveness of the motor temperature field simulation results are improved, and the simulation method and device have the guidance effect on structural optimization of the motor and adjustment of an actual operation mode.

The invention provides a deicing device for an electric transmission line. The deicing device for the electric transmission line comprises a shell, a power source, two or more walking wheels, a beating portion, a cutting portion and a remote control device. The remote control device comprises a remote control module. The shell comprises a vertical box, an upper box body and a lower box body, wherein the vertical box is vertically arranged, the upper box body is connected to the front side of the vertical box, and the lower box body is sealed. A passing space where the electric transmission line passes is formed between the upper box body and the lower box body. An opening is formed in the bottom of the upper box body. The waking wheels are installed at the upper box body in the transverse direction. The lower half portions of the walking wheels extend out of the upper box body. The power source and the remote control module are installed in the lower box body. The walking wheels are connected with a walking wheel motor. Through site simulation tests, the deicing device can effectively walk on a single divided conductor and double divided conductors and stride across a spacer, and the beating function and the cutting function can be both effectively achieved under the remote control condition.

The invention discloses a 10kV three-core cable temperature field model establishing method. The method includes the steps that 1, thermal field simulation is conducted on a 10 kV three-core cable loaded with current through ANSYS simulation software, and a temperature field distribution diagram of a cable radial section is obtained; 2, the cable section is cut through a cutting method in cooperation with a cable symmetrical structure and the isotherm, the cable is equally cut into three parts according to three cable cores, and one of the three parts is selected to serve as the research object; 3, a steady state thermal circuit model is established for the selected one-third cable structure, and cable structure layers located on the isotherm on the same diagram serve as joints in the thermal circuit model; 4, the thermal resistance generated when heat flow flows through all layers of cable materials and the generated losses are determined; 5, the 10 kV three-core cable steady state thermal circuit model is established according to the temperature field distribution diagram of the 10 kV three-core cable, all the joints in the determined thermal circuit model, the heat resistance among all the joints and the losses of various materials. The established 10kV three-core cable steady state thermal circuit model can be used for numerical calculation.

The invention discloses a BIM-based steel structure full life cycle management system and method, and belongs to the technical field of fabricated steel structure computer application. The system comprises four modules: a first module which is a design calculation module and a data information sharing platform provided for a plurality of different professional departments; a second module which isa prefabrication processing module, completes deepening of a design drawing, divides component categories according to information, gives a prefabricated component production plan and completes prefabrication processing in a factory; a third module which is a construction management module used for overall planning component scheduling, laser scanning of a construction site, simulation of site construction and supervision of construction quality and progress; and a forth module which is a maintenance management module used for regularly maintaining and detecting the building put into use andanalyzing and processing emergency accidents. According to the invention, cooperative management of the fabricated steel structure in the whole life cycle of design, processing, construction and use maintenance can be realized, and three-dimensional visual information collection, process supervision and later operation maintenance are carried out on the building.

A power transmission line wind vibration control method based on power transmission line iron tower and lead or ground wire integrated system model calculation and multi-dimensional random gust field simulation includes the steps: firstly, generating a wind load time history sample by the aid of harmonic synthesis to simulate a wind field based on a multi-dimensional random vibration theory; secondly, establishing a dynamic model of an integrated system of a tower, lead or ground wire and wind vibration control device, analyzing the initial state of a lead or a ground wire and setting boundary conditions of the model; thirdly, converting wind load into wind pressure, loading a power transmission tower and line system and calculating time history of axial stress and displacement of an iron tower rod by the aid of simulation software; and fourthly, analyzing and judging wind vibration strength and wind vibration suppression effects and improving control effects by the aid of an optimization scheme. On the basis of rigid-flexible dynamic coupling among a power transmission line tower, the lead and the ground wire and fluid-solid coupling between a random gust wind field and a tower and lead or ground wire system structure, the determined wind vibration control method has better implementation effects.

An ARINC429 data bus simulation test system belongs to the technical field of simulation test. It is characterized in that the ARINC429 data bus simulation and test environment is formed by the simulation controller [1], the data transmission and control bus [2], the ARINC 429 communication interface [3] and the ARINC 429 interface adapter [4], and the simulation controller [ 1] Through data transmission and control bus [2] control ARINC429 communication interface [3] to realize the transmission and reception of data information, simulate the generation and transmission process of information flow of airborne equipment such as airborne flight control system and avionics system, and receive Other airborne equipment information flow and display. The invention has the advantages of complete system function, reasonable layout, compact structure, reliable operation, convenient use, good expansibility and tailorability.

A demonstration device and a demonstration method for urban public security multi-disaster secondary derivation coupling simulation belong to the technical field of public security simulation. The demonstration device comprises a dynamic sand table, a projection device and a control system. An urban model is arranged on the dynamic sand table, a movable lift and a vibration instrument are arranged at positions inside the dynamic sand table. A detecting device is arranged on the dynamic sand table, and the projection device is divided into a dynamic sand table projector, a three-dimensional animation projector and a horizontal projection screen. By means of a method based on three-screen linkage by combining a physical model and a virtual three-dimensional image, demonstration of experiments and value simulation results of happening and developing rules under the conditions of urban multiple emergency events and coupling of the events is achieved. Dynamic demonstration of links of disaster field simulation reappearance, monitoring, information delivering, information access, predicting, pre-warning and decision control and the like are achieved. Visual presentation means are provided for the disaster reappearance, risk evaluation, scene deduction, pre-arranged planning practice, education and training and the like.

The invention belongs to the technical field of a battery management system and especially relates to a battery management system SOC estimation precision test system and test method. A single voltage simulation source, a battery set total voltage simulation source, a current simulation source, and a battery box temperature field simulation source A data are integrated through a data acquisition control system, high-voltage battery set external characteristic parameters can be simulated, wherein the parameters comprise a single battery voltage, a total voltage, single battery temperature and charge and discharge currents. During battery management system test, the battery management system SOC estimation precision test system is utilized to replace a battery set. The test method can be used for SOC precision test in the battery management system development and test process, thereby greatly reducing development and test period, saving the test cost, and improving the system reliability.

The invention discloses a bridge wind wave and flow coupling field, an elastic model and a dynamic response experiment test system body. The system comprises a wind wave and flow coupling field simulation system, a bridge elastic model in the wind wave and flow coupling field and a dynamic response experiment test system body. The wind wave and flow coupling field is generated by the wind wave and flow coupling field simulation system with time synchronization and space correlation of wind, wave and flow considered; simulation of the characteristic of a bridge elastic structure is achieved by the bridge elastic model in the wind wave and flow coupling field in the wind and flow coupling field generated by the wind wave and flow coupling field simulation system; the dynamic response of the bridge elastic model is tested by the dynamic response experiment test system body, and a test result is obtained. By means of the bridge wind wave and flow coupling field, the elastic model and the dynamic response experiment test system body, simulation of the wind wave and flow coupling field and the bridge elastic model in the wind flow coupling field and the dynamic response experiment test body can be achieved.

The invention discloses a high-voltage switch cabinet insulator electric field optimization method based on a quantum genetic algorithm. The method comprises the following steps that 1) a high-voltage switch cabinet insulator geometric model is built; 2) the high-voltage switch cabinet insulator model is subjected to electrostatic field simulation to obtain the maximum electric field intensity value, and structural factors for influencing the electric field distribution and the maximum field intensity are determined through changing variable structural parameters; 3) a population is initialized; 4) an objective function is determined, and a fitness degree function is calculated, wherein the objective function of an individual is the electric field intensity corresponding to the parameters; 5) for the individual population consisting of binary gene codes, the variation is carried out after the selection and the full-interference crossing; and 6) whether the quantum genetic operation stop condition is met or not is judged, if the stop condition is not met, the operation returns to the first step, and if the stop condition is met, the corresponding response value is calculated according to the optimized structure parameters obtained in the fifth step, and the maximum electric field intensity value is obtained. The method can realize the optimization on the high-voltage switch cabinet insulator electric field.

The invention provides a whole-flow-field simulation method of the Hermite interpolation basic weighted non-oscillatory format. A finite-volume Robust HWENO format is constructed in the Cartesian coordinate, and through the cooperation with the immersed boundary method, a compressible flowing-around problem is calculated, the robustness of the Robust HWENO format is better than that of a HWENO format, and the Robust HWENO format is more easily popularized into a high-dimensional or movable and self-adaptive grid. Under a structural grid, when directly simulating the problem, the finite-volume Robust HWENO format requires a high-quality grid, however, generation of the high-quality grid is very complicated, and the immersed boundary method is a good method which can well process the boundary of an object surface and can be effectively used in various computational grids. Therefore, in the method, the finite-volume Robust HWENO format is effectively combined with the immersed boundary method, numerical simulation of the compressible flowing-around problem can be effectively conducted on a very simple Cartesian grid, and several numerical value simulation results of classical steady and unsteady problems fully verify the effectiveness of the method.