92results about How to "Simulation results are reliable" patented technology

The invention discloses an analog simulation system of a complex power distribution network containing multiple voltage grades and 8 modules, which integrates the analog simulation technologies of an integrated power grid power supply, a distributed power supply, an accident, a circuit, an AC and DC power distributor, a diverse load and other analog simulation technologies, aiming at the simulated test demand of an active power distribution net technology with the characteristics of interaction and intelligence. The analog simulation system comprises 5 modules such as a power grid simulator which reflects the primary and secondary parts of a power grid, a power supply simulator, a load simulator, a control simulator and a protective simulator, further comprises 3 additional modules such as an event/detection simulator beneficial for the simulation test, an interface module, and a synchronous simulator. The analog simulation system provided by the invention comprises an integrated simulation test of steady state, transient state and multistage power distribution network including new elements such as a distributed power supply, a diversified load, an intelligent equipment/system, an automatic/information system, an AC/DC hybrid grid, closed loop operation, etc.

The invention discloses a mobile cable modeling and motion simulation method and a device based on physical characteristics. The method comprises: building the physical characteristic model of a mobile cable; solving the physical characteristic model of the mobile cable; according to the obtained solution, carrying out motion simulation on the mobile cable, and dispersing the path of the motion end node of the mobile cable into a set of path key points according to time sequence; storing the path key point information; obtaining the path key point information; according to the obtained path key point information, calculating the position information of multiple nodes of the mobile cable; substituting the obtained path key point information into the physical characteristic model of the mobile cable to be solved to obtain the position information of multiple nodes of the mobile cable corresponding to the obtained path key point information; and determining the space attitude of the mobile cable corresponding to the obtained path key point information. The invention can accurately express the physical property of the mobile cable and realizes physical characteristic modelling and motion process simulation of a flexible object in the true sense.

The invention provides a method and device for simulating the expansion of virtual support in blood vessel, and electronic equipment. The method comprises the steps: obtaining a current blood vessel model and a support model; calculating and obtaining an expansion internal force withstood by each support node of the support model; judging whether the virtual support corresponding to the support model makes contact with the blood vessel wall of the blood vessel model or not; updating the spatial position of the support nodes according to the expansion internal forces if the virtual support corresponding to the support model does not make contact with the blood vessel wall of the blood vessel model; calculating and obtaining compression external forces withstood by the support nodes if the virtual support corresponding to the support model makes contact with the blood vessel wall of the blood vessel model, and updating the spatial positions of the support nodes and the spatial position of the blood vessel nodes according to the expansion internal forces and the compression external forces; outputting the updated blood vessel model and support model as the simulation result when the expansion internal forces and the compression external forces are balanced. Therefore, the method achieves the real-time monitoring of the expansion conditions of the support in the blood vessel, can achieve the three-dimensional display of an expansion process, and enables the simulation result to be more real and reliable.

The present invention proposes and discloses a method for dynamically simulating a land future use scenario. The method integrates a capability that a cellular automaton (CA) simulates a complex systematic space-time evolution process and an advantage that a CLUE-S model simulates multiple types of land use type competitions; and the method overcomes certain inherent defects of a traditional CA or a pure CLUE-S model through advantage integration; in addition, intelligent computation of a distributional probability is realized by adopting an artificial neural network (ANN) algorithm; synchronous simulation of multiple land use changes is realized by introducing a competition mechanism of a roulette, so that the new method is more suitable for multiple types of land use data; and moreover, compared with a traditional model, the method has the practical advantages of higher precision, suitability for multiple scales, low data demand, few parameters, simple and convenient operation, high speed and the like. According to the method for dynamically simulating the land future use scenario, the intelligent algorithm (ANN) and the uncertainty model (the roulette) are effectively combined; and the method is applied to the prediction of the land future use scenario.

The invention discloses an occlusion-eliminating radiation energy density simulation method in a tower-type solar thermal power generation system. The method comprises the following steps: (1) an axially-parallel large bounding box for an overall heliostat field is built; (2) the large bounding box is equidistantly divided along a heliostat distribution direction; (3) light poles reflected and incident by the heliostats are modeled; (4) as for each light pole, an intersected grid intersected with the light pole is found out; (5) intersection determination is carried out on the heliostats in the intersected grid and the corresponding light poles; (6) shadow is converted into occlusion; (7) a corresponding relationship between a receiving panel and streamline drawing cache is built; (8) the heliostats and the occlusion thereof are projected on the receiving panel; (9) a sequence of heliostats in the streamline and the occlusion heliostats is organized and depth valuation is carried out; and (10) an occlusion area with reflection light spots is eliminated and is parallelly accumulated to cumulative cache. The quick simulation method of the invention can effectively improve the calculation accuracy and the efficiency, and the simulation result is more authentic and reliable.

The invention belongs to the technical field of a water environment simulation method, and particularly relates to a method for predicating and analyzing the water quantity and quality coupling simulation in an oversized river basin. The method comprises river basin multi-box division, single-box pollution check computation, single-box water quantity and quality coupling mode establishing, multi-box nesting and multi-box water quantity and quality coupling simulation. The method is mainly characterized in that a box body model and a water quantity and quality coupling theory are integrated into an oversized river basin (such as the Three Gorges river basin, the Yangtze river basin, large-scale lakes and water reservoirs) water quality simulation process so as to carry out system simulation and predication on water quantity and quality conditions in the oversized river basin. The method disclosed by the invention has the advantages that the computation is efficient, the operation is convenient, the requirements on data information are less, the complex problems caused by size difference and uncertainty are effectively treated, the technical defect of the water quantity and quality coupling simulation of the oversized river basin is filled, and information such as water pollution situation is provided for river basin management.

A multi-field coupling based vibratory stress relief simulating method for accelerometers includes three steps: the first step, simulating laser welding process; the second step, cooling naturally, reserving residual stress, keeping a model constant, removing heat flux density load, simulating natural cooling process and coupling transient state of a heat structure; and the third step, applying vibration stress and simulating time domain dynamics. By finite element coupling simulation of multiple physical fields of heat, structures and vibration and the like, distribution states of the residual stress after VSR (vibratory stress relief) are acquired. On one hand, the multi-field coupling based vibratory stress relief simulating method is used for evaluating removing effect of the residualstress of the VSR, on the other hand, by comparing affections on residual stress removal from different vibration stress, the optimum VSR vibration section is found, and accordingly stability and navigation accuracy of the accelerometers are improved. Besides, the multi-field coupling based vibratory stress relief simulating method can be applied in the technical fields of aeronautics and astronautics and finite element simulation and has excellent application prospect.

The invention discloses a system and a method for precisely identifying a target and calculating an effect in an ecological sponge type urban construction suitable area. The system comprises a spatialdata acquisition module, a suitable area spatial identification module, an index control and measure design module and a construction effect calculation module. The method is used for sponge city construction from city construction planning to engineering design whole process. Accurate identification of construction and reconstruction target suitable areas and suitable grade targets in urban heatisland control and urban landscaping processes can be realized, and the effects of flood disasters and high-temperature extreme climate events under different urban construction and reconstruction scenarios can be measured and calculated. The system comprises a novel sponge city and heat island control dual-target city planning and design framework, achieves refined remote sensing classificationand artificial intelligence detection algorithm aiming at precise identification of the ecological sponge city space suitability, and can effectively simulate the effects of city construction and reconstruction on rain flood and extreme high temperature events.

The invention discloses a simulation system for algal bloom emergency regulation and control under a changing environment and a method of the simulation system. The simulation system comprises a water customizing unit, a multifunctional simulation unit, an environment regulation unit, an algal bloom charging unit, a water quality monitoring unit and a control platform, wherein the water customizing unit is used for treating and customizing source water into experimental water, the multifunction simulation unit physically models according to a large-scale water area and simulates an algal bloom emergency measure, the environment regulation unit is used for emulating combined changes of field environment conditions, such as illumination, temperature and wind field, the algal bloom charging unit realizes spatial distribution simulation of algal blooms in any form at any time, the water quality monitoring unit is used for measuring spatial and temporal distribution of key water quality indexes in real time, and the control platform is used for controlling an operation state of a key device. The simulation system for the algal bloom emergency regulation and control under the changing environment and the operation method of the simulation system are suitable for prediction and optimization of emergency disposal scheme effects after large-scale water area algal bloom breaks out, and can conveniently and accurately predict implementation effects of algal bloom emergency measures, such as drainage basin water transfer, local water circulation and aeration methods.

The invention discloses a full three-dimensional simulation method for an acidification flow experiment. According to the method, a differential method is utilized to discrete a fluid seepage continuity equation and an acid-liquid mass diffusion reaction equation, and an H+ local equilibrium equation, a porosity change equation, a permeability change equation and a pore throat radius change equation are established at the same time; initial conditions and boundary conditions are substituted into the simulation equations; a simulation program is compiled by utilizing the equations, the initialconditions and the boundary conditions; 6, reservoir cores are scanned to obtain three-dimensional spatial distribution parameters of porosity; a three-dimensional spatial distribution model of the porosity is established, and the compiled program is utilized to achieve full three-dimensional numerical simulation of the acidification flow experiment on the basis of the established three-dimensional spatial distribution model of the porosity. According to the method, full three-dimensional numerical calculation is adopted, the calculation precision is effectively improved, and meanwhile the influence laws of each parameter on the development of wormholes are conveniently, quickly and accurately studied.

The invention relates to a shafting dynamic and static characteristic analysis calculating system of a large steam turbine generator unit to solve the problems that an existing computing system is low in computing result precision and working efficiency. The system comprises a modeling module used for establishing a rotor mechanical model; a bearing analysis module used for calling data of the rotor mechanical model of the modeling module and bearing loads and elevation data of a static analysis module, calculating steady state data and the dynamics coefficient of a bearing and storing the dynamics coefficient; a dynamic analysis module used for calling the data of the rotor mechanical model of the modeling module, the shaft load data of the static analysis module and the dynamics coefficient of the bearing analysis module and analyzing the critical rotating speed and the unbalanced response of a rotor and the rotor stability; the static analysis module used for calling the data of the rotor mechanical model of the modeling module and carrying out front calculation through the bearing analysis module and the dynamic analysis module. The shafting dynamic and static characteristic analysis calculating system is applied to the field of large turbines.

The invention provides a heat flux coupling simulation building method for a dam downstream riparian zone based on Lu model. The method includes the steps that 1, a riparian saturated-unsaturated seepage field-temperature field full coupling model is built, the model building includes the establishment of a seepage field, the building of a saturated-unsaturated heat migration model, and the description of the relationship between a temperature field and a seepage field; 2, boundary conditions are set for the riparian saturated-unsaturated seepage field-temperature field full coupling model, the setting of the boundary conditions include the setting of boundary conditions for the seepage field and the setting of boundary conditions for the temperature field; 3, the riparian saturated-unsaturated seepage field-temperature field full coupling model is solved, the Lu model is used to describe the relationship between equivalent heat conduction coefficient and water content of soil body inthe solving process, and the variation rule of temperature with time is obtained in the seepage process. The problem that an influence mechanism of dam discharge low temperature water to the saturated-unsaturated heat flux coupling in the dam downstream riparian zone cannot be simulated accurately in the prior art is solved.

The invention relates to a method for controlling wettability of an artificial conglomerate core. The method includes a water wet control method and an oil wet control method. In the water wet control process, a water-soluble nonionic surfactant OP-10 is added into a curing agent, the addition amount is controlled so that wettability of the artificial conglomerate core can be converted into hydrophily from neutral partial lipophilicity, and the wettability of the artificial conglomerate core is controlled. In the oil wet control process, quartz sand at different grades is mixed and treated with silicone oil, and the manufactured artificial conglomerate core has weak lipophilicity through a series of operation such as stirring, volatilizing and drying. The method for controlling the wettability of the artificial conglomerate core is easy to operate, low in cost, high in efficiency, stability and adsorbability and high in wettability control accuracy, the manufactured artificial conglomerate core approximates a natural rock core and is suitable for indoor flooding oil physical simulation experiments in the petroleum industry, and simulation results are more real and reliable and meet practical situations better.

The application discloses a network planning method. In the method, disparate system stations which generate interferences on a system are firstly determined and then during simulation, the disparate system stations are taken into consideration and regarded as stations of the system to carry out network planning simulation of the system so that a corresponding coverage prediction index which meets demands is obtained. The method is applied to a network planning scene which exists in a disparate system so that the reliability of network planning is ensured.

The invention relates to a three-dimensional solid-liquid coupling similar simulation system and method used for digging coal seam, belongs to the field of coal mining simulation technology, and solves the problem that the existing three-dimensional solid-liquid coupling similar simulation is complex in operation, high in cost, and bad in reliability of the simulation result. The simulation systemcomprises a box body, a container and a balance; an upper overlying strata, a coal layer and a lower overlying strata are arranged in the box body from top to bottom; the coal layer is made of paraffin; the upper overlying strata and the lower overlying strata are made of rock and soil granular material; a heating device is arranged between the coal layer and the lower overlying strata; a discharge port is arranged on the side wall of the box body; the discharge port is located at the junction of the coal layer and a bottom plate of the coal layer; the discharge port is connected with the container by a conduit; and the container is placed on the balance. The simulation system and method provided by the invention simulate the excavation of the coal layer in the three-dimensional solid-liquid coupling similar simulation test; and the simulation result is more reliable.

The invention discloses a GIS equipment bad contact temperature rise simulation test platform. The existing GIS test platform cannot effectively perform regulation and simulation of a contact way dueto the single contact switching-on manner. The GIS equipment bad contact temperature rise simulation test platform comprises a strong current generator, a contact simulation and regulation module anda main circuit module, wherein the strong current generator is an alternating-current source, and is used for controlling and measuring current flowing through a conductor according to demands; the contact simulation and regulation module is constructed by arranging and connecting multiple types of switch blades in parallel, and is used for selecting the type of a simulation test contact and regulating the position of the contact; the main circuit module comprises a conductor; the conductor, the strong current generator and the contact simulation and regulation module are connected in series to form a test main circuit. By adopting the GIS equipment bad contact temperature rise simulation test platform, multitype and multi-position regulation for bad contact can be realized under the condition of not starting GIS equipment, and the in-situ current load of a GIS can be embodied in cooperation with the strong current generator in order to simulate temperature rise overheat failures generated by bad contact.

The invention discloses a PEMFC bipolar plate flow channel cross section optimization method and a three-dimensional proton exchange membrane fuel cell. The optimization method comprises the followingsteps of 1, establishing a three-dimensional proton exchange membrane fuel cell geometric model; 2, meshing the three-dimensional proton exchange membrane fuel cell geometric model; 3, performing analog computation on the three-dimensional proton exchange membrane fuel cell geometric model; 4, extracting key simulation parameters, namely for each three-dimensional proton exchange membrane fuel cell geometric model, at the same position, extracting the key simulation parameters capable of laterally reflecting the influence of each three-dimensional proton exchange membrane fuel cell geometricmodel on the performance of the fuel cell, wherein the key simulation parameters comprise the speed of the cathode reaction gas, the concentration of the cathode reaction gas and the current density of the battery; and 5, optimizing the bipolar plate flow channel section. The method focuses on the influence of the cross section shape on the PEMFC performance, the calculation amount is reduced, andthe calculation stability and practicability are improved.

The invention relates to the field of electromagnetic metamaterials. In order to designed metamaterials to be more accurate and practical, the invention provides a metamaterial design method applied to a high-field magnetic resonance radio frequency coil. The design method can comprise the following steps that: the electromagnetic field simulation of a metamaterial periodic structure: using electromagnetic field simulation software to carry out structure design on the metamaterial periodic structure to enable the S parameter of the metamaterial to achieve magnetic resonance working frequency; the extraction of effective magnetic permeability: according to a simulated S21 parameter result, extracting the effective magnetic permeability of the metamaterial; and the manufacture of the real object of the metamaterial: manufacturing the designed metamaterial. The design method which is put forward by the invention has the main advantages: a simulation result is highly matched with the S21 measurement result of the manufactured real object of the metamaterial; a practically applied metamaterial size is taken as a simulation structure, a simulation result is more reliable, and therefore, the design method is more practical in a magnetic resonance field.

The invention provides a VISSIM simulation-based method for determining the length of an accelerating lane in a left entrance ramp confluence area. The method comprises the following steps of: acquiring road parameters and traffic flow data of the left entrance ramp confluence area of an expressway; establishing a VISSIM simulation model and an SSAM conflict model; determining simulation times, performing feasibility analysis and sensitivity analysis of default parameters, and completing calibration of correction parameters; designing acceleration lanes with different lengths and lane numbers,and establishing a corresponding VISSIM simulation model; and comparing the average travel delay and the traffic conflict number of the confluence area in each simulation scheme to obtain a design scheme based on optimal traffic operation efficiency and safety. According to the method, traffic flow characteristics are analyzed from two aspects of confluence area operation efficiency and safety, so that a recommended value of the accelerating lane length of the left-in-ramp confluence area is determined.

The disclosed electric control unit simulation test platform for a vehicle automatic transmission comprises: a conversion interface circuit connected to switch value in-out card of an industrial controller, an interface circuit connected to an analog conversion circuit and V/F circuit, and a industrial controller for simulation. This invention has well simulation precision and real-time, and fit to different vehicle.

The invention discloses a method for determining the anisotropic ratio of columnar jointed rock mass based on numerical simulation, which comprises the following steps: establishing columnar jointed rock mass samples with different column dip angles through finite element software; selecting a corresponding constitutive model and providing physical and mechanical parameters required for the constitutive model; setting up the calculation conditions of the constitutive model and debugging the calculation program, and carrying out the numerical simulation of rock mass specimens with different column dip angles and different confining pressures; calculating the anisotropic ratio of columnar jointed rock mass by extracting the monitoring data in the numerical simulation process. A numerical experiment of anisotropic columnar jointed rock mass can be carried out in batches repeatedly based on numerical simulation of a continuous medium, the anisotropy of columnar jointed rock mass under different stress states is analyzed, and then the anisotropy ratio is determined conveniently and quickly. Moreover, the simulation results are more reliable based on a large number of numerical experiments, and the method has an important practical significance for the design, construction and support scheme of columnar jointed rock mass engineering.