123 results about "Engineering simulation" patented technology

The invention relates to a large-sized combined dynamic and static multifunctional geotechnical engineering simulation testing device which comprises a plurality of counterforce stand devices, a front visible counterforce beam, a rear loading counterforce beam, an arch-shaped dynamic counterforce frame, a hydraulic loading system, a servo dynamic loading system, a model elevating translational trolley system and the like, wherein each counterforce stand device is formed by connecting a top beam, a side beam and a bottom beam through flanges and high-intensity bolts and can be combined freely according to a testing model; the left and the right parts of the front and the rear counterforce beams are connected with the side beam; the upper and the lower parts of the front and the rear counterforce beams are connected with the model elevating translational trolley system through pull rods; the hydraulic loading system is arranged in a steel grid formed by the top beam, the side beam and the rear loading counterforce beam; the arch-shaped dynamic counterforce frame is independent; and after the top beam is detached, the servo dynamic loading system can be arranged. The testing device is compact and reasonable in structure, narrow on the upper part and wide on the lower part, assembled flexibly, easy to operate, and convenient to load and observe and can be applied to planar and three-dimensional geomechanics static and dynamic model testing of geotechnical engineering under the conditions of foundation pits, side slopes and high ground stress.

The present invention relates to an urban underground engineering simulation test system, underground water simulation system and data acquisition system, in which the simulation box contains horizontal loading plate, horizontal loading device, vertical loading device and several layers of horizontal water inlet pipes. Said invention can implement three-dimensional simulation test of various urban underground railway engineering, tunnel and anderground cave engineering, ground base an foundation work, special underground construction method, side slope engineering and retaining wall engineering, etc.

The invention relates to a multifunctional assembly type physical similarity testing system for geotechnical engineering. The multifunctional assembly type physical similarity testing system is characterized by comprising a model box, a loading device and a data acquisition unit, wherein the model box comprises a left side plate, a right side plate, a front side plate, a rear side plate and a bottom plate which are detachably assembled; the loading device comprises a test rack, a sensor, a jack and a control panel, the jack can be glidingly arranged on the test rack in horizontal transverse direction and/or horizontal longitudinal direction and located above the model box, the sensor is arranged above the jack, and the control panel is connected with the jack and the sensor and controls and records data information of the jack and the sensor; the loading device is arranged above the model box; the data acquisition unit is used for acquiring and recording data information of a geotechnical engineering simulation model in the model box. The multifunctional assembly type physical similarity testing system has the advantages that pertinence and accuracy during testing are improved, the rate of utilization of the testing system is increased, and the system can be applied to simulation testing of geotechnical engineering issues such as a slope, excavation of a foundation pit, a pile foundation, a composite foundation, soil anchoring and the like.

The invention discloses a method and system for testing a configuration logic design of a DCS (Distributed Control System) of a nuclear power station. The method comprises the following steps of: importing a designed configuration logic diagram to be tested into a selected minimal configuration DCS; communicatively connecting the selected minimal configuration DCS with an engineering simulation process platform; according to the preset test progress, running the configuration logic diagram to be tested on the minimal configuration DCS, and interacting data with the engineering simulation process platform, then recording a test result; and according to the test result, modifying the configuration logic diagram to be tested. According to the method and system disclosed by the invention, the configuration logic diagram is tested by using the minimal configuration DCS and the engineering simulation process platform, the correctness and completeness of the result can be virtually verified without depending on real field equipment, the debugging work period is shortened, and the safety and reliability of the design process is guaranteed.

The invention discloses a model box applied to a large stereoscopic synthesis simulation test bench in geotechnical engineering, wherein four sides of the model box are spliced by a plurality of horizontal loading plates; the top of the model box is formed by splicing a plurality of vertical loading plates; each horizontal loading plate is connected with a horizontal loading actuator through a spheroid joint; each horizontal loading actuator is fixedly connected with a reaction wall through connection bolts; each vertical loading plate is connected with a vertical loading actuator through a spheroid joint; each vertical loading actuator is fixedly connected with a reaction beam; sealing joint strips are embedded between the side surfaces of the adjacent horizontal loading plates. The model box disclosed by the invention can be applied to a simulation test of soil engineering with different functions, such as underground space and excavation simulation tests, foundation and slope engineering simulation tests under the condition of rain and underground water level variation, dynamic response tests of pile foundations and soil around the pile foundations, segment simulation tests, and structure part performance tests; simultaneously, due to the adoption of the model box, the true three-dimensional loading of a large-sized physical model is realized.

The invention discloses a bearing simplifying method in finite element simulation analysis. According to the method, a three-dimensional gap unit is used for simplifying finite element analysis of an angular contact bearing, and a three-dimensional model of the bearing is drawn in three-dimensional mapping software solidworks. The bearing model is imported into finite element pre-processing software Hypermesh. An outer ring and an inner ring of the bearing are divided into hexahedral meshes. The outer ring and the inner ring of the bearing are connected through the three-dimensional gap unit. The spring stiffness K in the gap unit is worked out through a bearing radial stiffness calculation program. The finite element model is exported from the Hypermesh, then the finite element model is imported into engineering simulation software ANSYS, and mechanical calculation is conducted. According to the method, the calculation amount of finite element analysis can be simplified, the efficiency can be increased, and the calculation accuracy cannot be damaged.

The invention discloses a BIM (Building Information Modeling) risk monitoring system and method of a multilayer 4D (4-Dimensional) model, which are used for monitoring a subway construction risk. The BIM risk monitoring system comprises a BIM server, wherein the BIM server is connected with a 4D model collecting risk information module, a 4D model collecting construction progress information module and a system schematic diagram module, wherein the system schematic diagram module comprises an engineering simulation drilling module and a system construction progress module. According to the BIM risk monitoring system and method, based on the BIM application of the construction, the problem that the BIM is only used as design assistant analysis is solved, the secondary utilization and secondary development of the BIM are realized, the creative application of the BIM in the construction field is started, the modeling workload is reduced by adopting the multilayer 4D model, and a home owner can use means such as a mobile device to check the progress condition of a project at any time on the basis of a web showing form through dynamic 4D risk monitoring and management of a tunnel construction progress and 4D visualization of construction process simulation.

The invention discloses a silt coast high-turbidity sea area island siltation promotion engineering simulation method. A body-fitted coordinate system is adopted to discretize a study sea area, sediment grain size grouping is considered, wave radiation stress is utilized to calculate the wave influence, a two-dimensional wave current sediment mathematic model is established, the siltation promotion area is calculated, the effective siltation promotion amount is counted, the siltation promotion result is estimated, and mechanism analysis is conducted. By means of the silt coast high-turbidity sea area island siltation promotion engineering simulation method, the wave current sediment mathematic model is established aiming at unique dynamic geomorphologic features of a silt coast island of having numerous curved shorelines, large water depth, complicated underwater topography, strong tides under the effect of rotating flow, high water body turbidity suffering a lot from the weather waves, and sediment movement jointly acted by wave currents; meanwhile, the influence of bottom frictional resistance changing with different underwater topographies and shoreline shapes and sediment concentrations on sand contents in different seasons is considered, and the siltation promotion engineering dynamic geomorphology effect simulation requirements of silt coast high-turbidity sea area islands with different topographic shapes can be adapted to and met.

The invention provides a geotechnical engineering simulation test platform. The geotechnical engineering simulation test platform comprises a simulation model system, a loading system, a rainwater simulation system and a data acquisition system. The simulation model system adopts various rock-soil similar simulation materials to pile or pour a geotechnical engineering model; a reinforcing component can be implanted in the geotechnical engineering model to simulate treatment engineering; and an observation instrument can be implanted to combine with measurement of external observation equipmentto form a model deformation data acquisition system. The rainwater simulation system can simulate rock-soil softening and corrosion and observe the stability of the geotechnical engineering. The loading system can simulate geologic stress field false triaxial loading. Therefore, the system has multiple functions of realizing geologic stress field simulation, large-scale simulation, water-soil coupling simulation and data automatic acquisition, is high in plasticity, simple to manufacture and convenient to operate, can simulate the softening phenomena such as erosion and corrosion of various kinds of geotechnical engineering with potential failure surfaces under the action of rainwater, and can reappear the geological disaster destruction process and engineering reinforcing treatment effect through three-dimensional simulation tests.

The invention belongs to the technical field of system reliability analysis and design, and particularly discloses a nuclear power equipment system reliability assessment method, which comprises the following steps: firstly, carrying out fault mode and influence analysis on equipment according to functional structure decomposition and related fault information of nuclear power equipment; establishing a fault tree model of the equipment based on a fault tree analysis method; then, establishing a reliability prediction and distribution model of the equipment; establishing a reliability analysismodel considering common cause failure; On the basis of previous analysis, after maintenance factors in the service period are considered, a maintenance strategy analysis model based on reliability isestablished to formulate a periodic maintenance strategy; and finally, based on a human factor engineering simulation platform, establishing an equipment inspection and maintenance simulation model to analyze a specific inspection and maintenance process. The model established by the invention can provide important reference and guidance for actual nuclear power equipment design, operation, maintenance planning and the like.

The invention provides a shipbuilding man-machine engineering simulation evaluation method and a system. The method comprises that S1. the product data, tool data, building resource data, virtual human data and technological requirements which the shipbuilding technology relates to are input, and a environment of shipbuilding man-machine engineering simulation evaluation is established; S2.according to the input technological requirements, the processes of shipbuilding technology is simulated and the critical technological processes of shipbuilding are screened out; S3.the critical technological processes of shipbuilding screened out is performed the virtual human operation simulation; S4.the virtual operation of the virtual human is performed a man-machine engineering evaluation and a result of man-machine engineering evaluation is acquired; and S5.judging if the result of man-machine engineering evaluation reaches the standard, if the result reaches the standard, the result of shipbuilding man-machine engineering simulation which the result of man-machine engineering evaluation that reaches the standard corresponds to are output, if the result does not reach the standard, go back to the step 2. The shipbuilding man-machine engineering simulation evaluation method has the advantages of achieving man-machine engineering simulation and analysis and evaluation for the shipbuilding technology at design stage and avoiding the design mistake.

Systems and methods of selecting a solver with appropriate numerical precision in each of a series of hierarchically related engineering simulations are described. According to an exemplary embodiment of the present invention, a series of hierarchically related engineering simulations comprises a sequence of finite element analyses for designing and analyzing a structural product. An input file describing the structural product and type of engineering simulation is received. Each different type of engineering simulations is checked to determine which solver with appropriate numerical precision (i.e., single or double precision) is used. A corresponding executable module (e.g., Finite Element Analysis software module) is then used for performing the analysis of that engineering simulation. The process repeats until all of the engineering simulations have been conducted in the entire sequence.

The invention discloses an engineering simulation set and method for quantitative evaluation of flushing efficiency of cementing pre-flushing fluid. The set mainly comprises a support, a bearing disc, an artificial core, a core holder, a variable speed motor, a mass sensor and a computer acquiring terminal. A height adjusting fixture is disposed on the support. A slurry cup for holding cementing pre-flushing fluid is disposed on the bearing disc. The height adjusting fixture is connected with the mass sensor, the variable speed motor and the core holder in order. The core holder is used for holding the artificial core. By adjusting the speed of the variable speed motor, speed of the artificial core in the pre-flushing fluid is controlled to simulate construction displacement. The mass sensor connected with the computer acquiring terminal is used for acquiring, recording and storing, in real time, mass changes of a filter cake on the surface of the artificial core and calculating flushing efficiency so as to draw curves. The engineering simulation set and method has the advantages that a principle is reliable, operating is simple, full-course quantitative evaluation and analysis of flushing efficiency is achieved, and basis is provided for the optimization of pre-flushing fluid systems, the optimization of pre-flushing fluid performance and the optimization of construction parameters such as flushing time and displacement.

The invention relates to a servo actuator system simulator and a simulation method thereof, and belongs to the technical field of engineering simulation. The servo actuator system simulator is characterized by comprising a signal definition operating unit, a parameter setting and running control operating unit, an analog signal input unit, an RVDT signal input unit, an actuator signal simulation unit, a servo valve signal simulation unit, a control surface position signal simulation unit, fault setting control units, a system control bus and interface adapters, wherein the signal definition operating unit and the parameter setting and running control operating unit are used for receiving the operational input from a user; commands and parameters for controlling the actuator signal simulation unit, the servo valve signal simulation unit and the control surface position signal simulation unit are formed according to the operation selection or parameter setting from the user; and a control interface module outputs an interface signal required for a flight control system. The servo actuator system simulator has the advantages of complete system function, reasonable and compact structure, reliability in operation, convenience in use and good expansibility and tailorability.

Methods and systems for applying mass scaling in finite element analysis is described. Elements with a critical time step smaller than a user desired time step are identified. Out of these elements, elements located in a particular region requiring realistic simulated dynamic responses are processed with selective mass scaling and the rest are processed with regular mass scaling. Selective mass scaling requires more computation but can better preserve dynamic structural characteristics. The aforementioned method is referred to as a mixed mode mass scaling. Mixed mode mass scaling allows engineering simulation to be conducted within a reasonable turnaround time, because only a portion of the FEA model is subjected to more computation intensive selective mass scaling. Selective mass scaling technique includes reducing effects caused in three translational and three rotational rigid body modes of shell element.

The invention relates to a cylindrical roller multi-circular-arc variable curvature profile engineering simulation method. In the method, a cylindrical roller is divided along the axial line direction into plural circular arc sections connected with each other, the intersection point coordinate value of the boundary of each section is calculated according to a given special logarithmic curve, the radius value of each segment of circular arc is calculated by use of adjacent circular arc segments and line of centers of two circular arc segments, and contact stress distribution along the axial line direction of the roller is calculated and analyzed under the condition of different-number variable curvature circular arc profile based on the theory of contact mechanics, and compared with theoretical logarithmic profile contact stress distribution to therefore select an optimal number of proper variable curvature circular arcs. The invention adopts variable curvature multi-circular-arc combination simulation to substitute for theoretical logarithmic curve, realizes low manufacturing cost for variable curvature multi-circular-arc profile roller, overcomes the stress edge effect of a conventional straight generatrix shaped roller end part, provides a theoretical foundation for generalization of roller crowned design technology, and is applicable for crowned design of cylindrical roller and tapered roller as well as roller inner and outer rings.

The invention discloses a simulated lunar soil for engineering and a preparation process thereof. Cinerite in Jinchuan District, Huinan County, Jilin Province is selected as the raw material of the simulated lunar soil; the simulated lunar soil is prepared from nine types of cinerite of 3 meshes, 4 meshes, 8 meshes, 10 meshes, 18 meshes, 40 meshes, 60 meshes, 160 meshes and 200 meshes according to respective weight percentages. The preparation process of the simulated lunar soil comprises the steps of raw material selection, scoria air-drying, scoria coarse crushing and drying, scoria pulverization and finished product preparation. The simulated lunar soil prepared through the preparation process of the invention meets the requirements of the simulated lunar soil for engineering in both preparation cycle and control indexes.

The invention discloses a flexibly-expanded general experiment platform for a modular multi-level current converter. The platform comprises a current conversion side I and a current conversion side II which are symmetrically arranged, wherein the current conversion side I comprises a switch cabinet, a voltage regulator, a transformer, an analogue reactor and a current converter cabinet which are sequentially connected; the current conversion side II comprises a switch cabinet, a voltage regulator, a transformer, an analogue reactor and a current converter cabinet which are sequentially connected; and the current conversion side I and the current conversion side II are connected through a lead. The invention provides an experiment platform for theoretical research and engineering simulation for a flexible direct-current transmission system/static reactive compensation device using the modular multi-level current converter, and meets the needs for the engineering simulation tests of different scales and different levels; moreover, the boosting as well as capacity expansion of the experiment platform can be finished by changing a reference value of a control system and increasing the number of sub-modules in serial connection without adding equipment; and the general experiment platform has the characteristic of strong expandability, and saves the floor space and investment of equipment.

The invention discloses a mooring power truncation simulation method based on an energy spectrum, and belongs to the technical field of oceanographic engineering simulation test. The method comprisesthe steps: applying irregular motion excitation to the top of a mooring line, and obtaining a mooring force in a time domain through a nonlinear power response model of the mooring line; extending theperturbation of the mooring force to the frequency domain through a fast Fourier transform algorithm to form a mooring energy spectrum; building a multi-target optimization function through the energy corresponding to a finite number of frequency points selected from the energy spectrum according to one weight, and performing solving and calculation to obtain a mooring line parameter result meeting the power truncation optimization requirements. In the method, the nonlinear features of the dragging force and inertia force of the mooring line are completely maintained in the time domain, and the peak values and frequency of the features are also maintained to the maximum degree after the features are converted to the frequency domain, thereby effectively guaranteeing the similar power response before and after truncation. In addition, the number of optimization variables is smaller, thereby solving a problem that the time-step by time-step contrast in the complete time domain consumesa large amount of time and a credible solution cannot be found.

Provided is a loading device for a geotechnical engineering large-sized three-dimensional comprehensive simulation test bed. The loading device for the geotechnical engineering large-sized three-dimensional comprehensive simulation test bed comprises reaction walls and reaction beams, wherein the reaction walls are made of reinforced concrete, and are of a double-layer structure, a personnel operation channel is arranged between the double-layer reaction walls, a control pipeline penetrates into the position between the double-layer reaction walls through reserved horizontal installing holes formed in the reaction walls, and is connected to a control room of a ground test building, and the reaction beams stretch across the geotechnical engineering large-sized three-dimensional comprehensive simulation test bed, are arranged on the upper end faces of the reaction walls, and are fixedly connected with the reaction walls. The loading device for the geotechnical engineering large-sized three-dimensional comprehensive simulation test bed can achieve real three-dimensional loading, and can be used for simulation of geotechnical tests with different functions, such as an underground space and an excavation simulation test of the underground space, a foundation and slope engineering simulation test under the conditions of rain and rise and fall of the underground water level, a dynamic response test of a pile foundation and soil around a pile, a duct piece simulation test and a structural component performance test.

The invention discloses a method for building a universal development platform of a three-dimensional engineering simulation system. The method comprises the steps of designing a platform framework structure (S1) by three layers of a bottom layer, a middle layer and an application layer; building a platform bottom layer foundation class library (S2) which consists of an operating system class library, a C++ class library, and an Open GL graphics library; creating a platform middle layer foundation function module (S3) which is of a three-dimensional simulation foundation function module; and creating a platform application layer function module (S4), as well as a platform Visual Studio engineering template (S5). The method adopts a layering structure, thereby effectively lowering the development difficulty of the three-dimensional engineering simulation system, reducing repetition of codes, improving the development efficiency of the system, shortening the research and development period of the system; and the method is good in universality and strong in development and extensibility properties, and has obvious popularization and application values.

An engineering simulation tool uses boundary regions of proposed design modifications to a finite design element to assess the impact of those proposed design modifications. This tool allows a designer to incorporate a new design feature into a proposed model and generate simulated performance results for the proposed design without re-execution of finite element method.

The invention provides a constructional engineering bidding document generating method. The constructional engineering bidding document generating method comprises establishing a civil engineering 3D model, a steel bar 3D model and a water, warm supply and electricity 3D model; calculating the budget quota, adjusting the price difference, and leading out an engineering price-calculating table; calculating work days needed by each operation in dependence on the led-out engineering quantity and the labor quota, and compiling a progress plan and a resource supply plan; integrating the 3D models, the progress plan and the resource supply plan which are needed by the constructional engineering; adjusting the progress plan and the resource supply plan, optimizing the progress plan, finally completing engineering simulation construction, recording and preserving the engineering simulation construction process by means of screen recording software, generating a video file used for constructional engineering bidding, and generating a constructional engineering bidding document by combining the literal content of the bidding document. According to the invention, the bidding document content is visually reflected, literal descriptions are converted into images, the management level and construction strength of the bidding company can be improved, the conventional bidding document mode is improved, and the bidding document credibility is improved.

The invention discloses a piled anchor supporting and protecting model test system for fractured rock slope engineering. A slope model, a road engineering simulation assembly, an installation and loading assembly, fractured slope simulation assemblies and a slope protection assembly are integrated into a system framework; the slope model is arranged at the bottom of the system framework; the slope protection assembly comprises an anchor cable ground beam module and an antiskid pile group module; the road engineering simulation assembly comprises a slope bottom overhead bridge module and a slope top roadbed engineering module; the fractured slope simulation assemblies are arranged at the section end of the slope model; the installation and loading assembly is arranged at the top of the system framework and can hoist and load the slope protection assembly and the road engineering simulation assembly to the slope model in place; the fractured slope simulation assemblies are arranged on the side surface of the system framework and can accurately locate and simulate a fracture zone of the slope model. The road engineering simulation assembly verifies the engineering safety test; the slope protection assembly is configured to verify the slope protection effect. The piled anchor supporting and protecting model test system is high in integrality, high in mechanical degree and high in flexibility.

The invention discloses a simulation platform of a cooling system of a high-voltage direct-current transmission converter valve, and is characterized in that a software support module provides a realistic basis for the simulation platform of the cooling system of the high-voltage direct-current transmission converter valve, and provides function support of a program language and a human-machine interface for the other module; a basic function module provides a basic element for the simulation platform, a real-time state of the cooling system of the valve constructed by the element is respectively fed back to a control protection program module, a device risk evaluation analysis module and a device fault processing decision module, and the corresponding modules are used for control protection, risk evaluation, computation and release, and device fault processing scheme release. The simulation platform has a friendly working interface as a practical engineering simulation software, so that the simulation operation, which is the same as the field operation method, is realized, the working condition of the cooling system of the high-voltage direct-current transmission converter valve is reflected in a real-time manner, and the device risk evaluation analysis and the device fault processing decision can be carried out according to the working condition.

The invention provides a three-dimensional visualizable simulation method for crack propagation and water burst of tunnel surrounding rock, belonging to the field of geotechnical engineering simulation testing methods. The simulation method comprises the following steps: (1) soaking a transparent similar material tunnel model into transparent liquid with a same refractive index as the model and employing a uniform LED light source to irradiate the model; (2) arranging a three-dimensional digital image acquisition system at one side or two sides of the model to shoot the three-dimensional image of a crack in the model, wherein an opaque phenomenon occurs where a crack is generated in the process of tunnel excavation and disintegration of surrounding rocks; (3) carrying out real-time acquisition of the whole process of crack propagation and evolution, wherein cracks appearing at a former stage disappear due to filling of the transparent liquid, which prevents influence on observation of cracks appeared at a subsequent stage; and (4) subjecting acquired image sequences to processing and analysis so as to obtain the actual evolution process of three-dimensional crack propagation. The method is capable of actually reproducing the three-dimensional crack propagation of the tunnel surrounding rock, simple to operate, visual in process and reliable in results.