53 results about "Metamodeling" patented technology

A system and method for providing ontology objects for use in a metamodeling environment is disclosed herein. The method comprises (a) providing a framework for creating a metamodel, wherein the metamodel comprises one or more entities, relationships, and semantics and the framework accepts input from a user to create the entities, relationships, and semantics, (b) generating ontology objects, wherein the ontology objects comprise source code for one or more classes, and wherein each class corresponds to one of the entities; and (c) compiling the source code. Further, the method may comprise detecting that a change has been made to the metamodel, updating the ontology objects to reflect the change to the metamodel, wherein updating the ontology objects comprises generating new source code for one or more classes; and compiling the new source code.

The invention discloses a smart city heterogeneous data sharing method based on a meta model. The smart city heterogeneous data sharing method based on the meta model comprises the first step of establishing a city data meta model modeling frame according to the MOF meta modeling theory, the second step of establishing a city data meta model universal element set according to city data characteristics and description requirements, the third step of developing a data meta model special element set according to city data basic classification and a special element set expansion mode, the fourth step of forming a meta model universal element set and special element set formalization method on the basis of XML template modeling, the fifth step of achieving network directory services and data services and establishing an open city data meta model registering and managing platform, and the sixth step of designing a city data fine granularity discovery interface and obtaining data according to practical application requirements of users. According to the smart city heterogeneous data sharing method based on the meta model, an open and standard city heterogeneous data sharing solution is provided for users, support is provided for city heterogeneous data online access, follow-up processing and collaborative application, and the method is efficient, practical and reliable during city heterogeneous data sharing.

A modeling method of telecommunication field based on unified modeling language includes structuring two¿Cstage of modeling mechanism for elementary modeling and modeling based on structure of unified modeling language of four layer elementary data, using elementary modeling to establish field elementary model and modeling to establish a concrete application model, applying custom ¿C made function to relate a concrete component in model to a concrete equipment and using model to control and supervise equipment.

The invention relates to a product unified model construction system based on a semantic meta model and a construction method thereof, and belongs to the technical field of product modeling. The system comprises a human-computer interaction interface (000), a product modeling subsystem (100), a product semantic meta model definition and management subsystem (200) and a product model management subsystem (300). The human-computer interaction interface is connected with the product modeling subsystem, the product semantic meta model definition and management subsystem and the product model management subsystem. The product modeling subsystem is connected with the product semantic meta model definition and management subsystem and the product model management subsystem. Compared with the systems and the methods in the prior art, a multi-level product modeling framework is constructed through combination of the meta modeling mechanism and the ontology technology so that product geometric and non-geometric information semantic description can be realized, and product life cycle information integration, sharing and reusing can be realized; and design personnel can create normal product information models without being proficient in the ontology thought or the modeling language internal structure so that the design efficiency and quality can be enhanced.

The invention relates to a modeling method of an asymmetric spur gear pair. The modeling method includes firstly calculating coordinates of equant key points on a gear profile by a gear profile of an asymmetric spur gear, creating gear profile key points by ANSYS software, generating a gear profile sample curve of the key points, setting up a single-gear end face, an integral-gear end face, a solid asymmetric spur gear model and an asymmetric spur gear transmission pair model, finally dividing finite element grids and setting dynamic constraints and load to obtain an asymmetric spur gear transmission pair finite element model. The integral modeling process realizes parameterization, and finite element modeling quality of a gear transmission system as well as analysis efficiency is greatly improved.

A method, system, and computer program product for providing troubleshooting data for reported fault conditions on equipment is provided. An engineering model is configured for the equipment. The engineering model includes at least one failure scenario and an associated symptom. The engineering model is stored in an equipment model database. A meta model representative of at least one relationship between the engineering model and a reported fault condition for the equipment is instantiated. A user input for the reported fault condition is stored in a decision support system (DSS) database. The DSS database forms a wrapper over the equipment model database based on the user input. The meta model is further instantiated using user input data from the DSS database. An optimal troubleshooting procedure for the equipment is determined based on the meta model as instantiated.

The invention discloses a method for rapidly generating plate-type satellite-structure node merging grids. The method includes the following steps that 1, middle surfaces of a satellite-structure geometric model introduced into finite element modeling software are extracted; 2, to-be-processed middle surface sets and the number N of elements of the middle surface sets are obtained; 3, related operation is carried out on all surface pairs (A, B); 4, all the surfaces are sutured; 5, the geometric model of the structure is divided into finite element grids. According to the method, the geometry obtained in the mode that the middle surfaces of the satellite-structure three-dimensional solid model are extracted can be automatically processed, gaps between the faces are eliminated, redundant parts are deleted, and the high-quality node-merging finite element grids can be divided through the finally-generated geometric model. A large amount of human-computer interaction operation is avoided, required time is short, universality is high, the application range is wide, and the quite-high practical engineering value is achieved.

The invention relates to a finite element modeling method of a thermal barrier coating of a turbine blade with multiple cooling channels. The finite element modeling method includes the steps of firstly, modeling a whole turbine blade without the cooling channels, wherein the particular modeling process includes the steps of tenon modeling and blade body modeling; then building a geometric model of the turbine blade with the multiple cooling channels, wherein the modeling process includes the steps of modeling a blade body part with the multiple cooling channels, modeling a tenon part with the multiple cooling channels and connecting the two models. The finite element modeling method is completely carried out in finite element software ABAQUS, and the problem of mismatching, caused by incomplete compatibility of multiple pieces of software, between parts is solved; in addition, the true shape of a tenon and the practical condition that the turbine blade is provided with the multiple cooling channels are considered during building of the geometric model, the built finite element model of the thermal barrier coating of the turbine blade is close to the practical condition, and computing results of follow-up temperature field and stress field analysis are accurate.

The invention discloses a finite element modeling method for a variable stiffness composite laminate. The method includes performing programming through Python and a PCL language; directly extractingthe fiber angle and node information of a laminated plate shell unit in a finite element model established by a Patran finite element through an operation file; calculating a central node coordinate of each shell unit, if the size of the shell unit is relatively small, approximately regarding the fiber angle of the point as the fiber angle of the unit, and finally re-endowing the fiber angle of each shell unit with the attribute of the shell unit according to a set curve track, thereby realizing fiber curve laying of the laminated plate. A variable stiffness laminate model is obtained by combining Patran and Python, then the model is submitted to Nastran to be solved and analyzed, and visualization processing is carried out through Patran import. According to the method, two programming languages of Python and PCL are combined, other platforms are not needed, and finite element modeling of the variable-rigidity laminated plate can be achieved through Patran.

The invention discloses a crystal plasticity finite element modeling simulation method. The method comprises the following steps of acquiring grain information based on EBSD analysis; importing a ctf format file generated by EBSD analysis into Drem.3D software to realize automatic reconstruction of a crystal grain structure, and outputting an input file and geometric orientation data of each crystal grain; processing the grain geometric orientation data through a Python language script to obtain average geometric orientation information of each grain; combining the grain average geometric orientation information with the input file by using a Python script to generate a complete input file with geometric model information and material attribute information; giving boundary conditions to the model in ABAQUS finite element analysis software, and setting a constitutive relation of the model by utilizing a UMAT subprogram, so that the whole crystal plasticity finite element analysis process is realized. The process of crystal plastic finite element modeling and simulation analysis is realized.

The invention discloses a finite element modeling and correcting method and system for a structure with a connection relationship. The method comprises the following steps: establishing an initial finite element model of the structure with the connection relationship; carrying out a modal test on the structure with the connection relationship; performing simulation calculation on the finite element model to obtain a simulation result; comparing the simulation result with the test result to obtain a result error; using an optimization algorithm to transmit a result error, correcting the connection layer grid, and performing simulation calculation on the corrected finite element model to obtain a corrected simulation result; and iterating to a preset convergence condition to obtain a corrected final finite element model, and completing finite element modeling and correction. According to the method, equivalent modeling is carried out on a connection part in an engineering structure by adopting a connection layer grid, and grid parameters are corrected by adopting a multi-target particle swarm algorithm to obtain an accurate finite element model.

Using metamodels during context-sensitive analyses of reusable components of computer software applications, including identifying entry and exit paths into and from a reusable component within a metamodel of a computer application development environment, determining during a static analysis of a computer software application that navigation will proceeds along a path corresponding in the metamodel to such an entry or exit path, retaining, if an entry path, an identifier of an invoking node along the path within the computer software application, and, if an exit path, for each terminal node along each of a plurality of paths from the reusable component within the computer software application, comparing an identifier of an invoking node preceding the terminal node with the retained invoking node identifier, and determining, if the invoking node identifiers match, that the path among the plurality of paths is a correct path for a current context of the static analysis.

The invention discloses a military strength entity behavior simulation meta-modeling method based on an improved behavior tree, and the method comprises the steps: formulating a behavior tree model xml description specification, building a simulation behavior modeling tool, and outputting a behavior tree model xml file; improving the behavior tree, and constructing a simulation behavior tree framework; preconditions are set for the behavior tree nodes, and behavior decision rules are formed through the behavior tree nodes, the multi-way tree structure relation between the behavior tree nodes and the preconditions; constructing an actuator model; and on the basis of the simulation behavior tree framework, behavior decision rule representation and actuator model construction, generating a military strength entity behavior simulation model according to a process. According to the method, an effective solution is provided for military strength entity behavior meta-modeling and simulation from the aspects of model specifications, behavior trees and directed graph technologies, and the problems that bottom-layer technical details of behavior modeling of a simulation platform/engine are invisible, and model parameter configuration is not flexible are solved; the method can be widely applied to equipment support behavior simulation modeling, combat behavior simulation modeling and the like.

The invention provides a missile-gun coupling finite element parameterized modeling method, and relates to the technical field of mechanical structure parameterized modeling. A chamber barrel missile-gun coupling finite element modeling process is described through a Python language, and a missile-gun coupling finite element model is established by using a script, so that the establishment of the missile-gun coupling finite element model is more convenient and faster. The method mainly comprises: firstly, establishing a barrel and projectile two-dimensional sketch, realizing full constraint on the two-dimensional sketch and defining parameterized variables, automatically generating a three-dimensional model according to the two-dimensional sketch, shifting barrel nodes by adopting a Python language according to a winding angle change rule, and establishing a coupling relationship between the projectile and the barrel by adopting Python description. According to the method, automatic change of the missile-gun coupling finite element model and automatic update of the numerical model are realized by adopting a programming technology, so that the modeling speed of the missile-gun coupling finite element model is increased, the design period is shortened, and the working efficiency is greatly improved.

The invention provides a beam element simulated wind power blade static test method, device and equipment. The method comprises the steps: carrying out the layering modeling on a wind power blade to obtain section attribute information, and storing the section attribute information and target load information required to be verified by design in an Excel document to serve as initial information for standby application; carrying out the modeling on the wind power blade in a beam element modeling mode, and calculating the bending moment and deformation of the wind power blade under the action ofloading force; and then, according to software prompts, adjusting the magnitude and direction of the loading force until deformation convergence and bending moment meet target load verification requirements, and completing the simulation of the static test scheme of the wind turbine blade. According to the scheme, the operation is easy, the ratio of the load of each iteration to the target load and the change of blade deformation along with the loading force can be displayed in real time, and simulation intuition is provided; the convergence speed of the calculation result is high, the calculation speed is increased, a self-made programming program is adopted as a whole to replace previous finite element analysis software, and the cost is reduced.

A three-dimensional entity unit modeling method of a gear system comprises the steps that firstly, according to the structural characteristics of the gear transmission system, HYPERMESH software is used for preprocessing a complex structure, three-dimensional entity unit models of a gear substructure and a transmission shaft substructure are established respectively, and accurate division and optimization of grids are carried out; then, ANSYS software is used for carrying out modal analysis and extracting a mass matrix and a rigidity matrix; then, nonlinear factors such as time-varying rigidity are considered, and gear tooth meshing of the gear transmission system is modeled through the Pasternak elastic foundation beam theory; finally, according to the interface displacement coordinationcondition, integrating, coupling and dimensionality reduction are conducted on the models of the transmission shaft, the gear and the bearing system through a modal synthesis method, and a high-precision gear transmission system dynamic model matched with the dynamic characteristics of the equipment is established. According to the method, the model precision can be guaranteed, and the calculationefficiency can be remarkably improved, so that a more efficient and accurate method is provided for quantitative analysis of the vibration of the gear transmission system.

The invention discloses a data processing method and a system therefore, for frame-type rotating dynamical machine foundation structure design, belonging to the data processing technical field. The method comprises: according to the basic data types of frame-type rotating dynamical machine foundation structure, classifying basic data; inputting the basic data; converting the basic data into text format and deriving out the data of text format; reading the data of text format, and processing finite element analysis of the frame-type rotating dynamical machine foundation structure on the data of text format. The system comprises: a classifying model, an input model, a conversion derivation model and a read analysis model. The invention classifies basic data to convert complex calculation parameter input and finite element modeling processes of finite element analysis software into simple interactive data input process, therefore, the designers not familiar with finite element analysis software can quickly complete the finite element analysis of frame-type rotating dynamical machine foundation.

The invention relates to the technical field of finite element modeling and numerical simulation, and discloses a Python-based converter valve anti-seismic analysis Abaqus parametric modeling method and a storage medium, and the method comprises the following steps: 1, determining the size, material and mechanical property parameters of a converter valve according to actual engineering, and determining a required anti-seismic analysis method; 2, corresponding modeling information is written in through a Python script program, and a basic structure of a finite element model is built; 3, running the Python script program in the step 2, and inputting the parameters determined in the step 1 into an interactive dialog box; and 4, reading the parameters input in the step 3 by Abaqus software, automatically generating a corresponding finite element model through a Python program, and carrying out response spectrum or seismic wave time history analysis as required. According to the method, rapid and automatic modeling can be carried out on converter valves with different parameter sizes, the modeling efficiency and accuracy are greatly improved, and anti-seismic analysis can be conveniently carried out on various converter valves.

The invention discloses a BIM-based universal modeling method for a mechanical model. The method comprises the following steps of 1, establishing a standard library for converting a BIM model into a mechanical finite element model; and 2, establishing an initialized mechanical finite element model on the basis of the standard library; wherein the standard library comprises a standardized componentfamily library and a simulated component family library, component attributes of the standardized component family library comprise variable parameters, invariant parameters, finite element modelinginstruction codes and dead load, and the simulated component family library comprises an additional constant load family, a live load family and a boundary condition family. Forming finite element modeling instruction codes and self-weight loads of the BIM model and the components based on the standardized component family library; and giving additional constant load, live load and boundary conditions to the BIM model based on the simulation component family library. According to the method, the conversion problem from the BIM model to the mechanical model is solved, and the efficiency and precision of establishing and optimizing the mechanical finite element model can be improved.

The invention relates to a three-dimensional multi-particle finite element simulation method for predicting high-speed pressing forming performance of metal powder, which comprises the following steps of: generating an initial random stacking model of three-dimensional spherical particles by using discrete element software, and extracting central coordinates and corresponding diameter data of the spherical particles; running a python script program in finite element software Abaqus, automatically completing modeling of spherical particle parts with different diameters, and generating an assembly; setting material attributes of the particles; each powder particle part is automatically divided into hexahedral structure grids with a reasonable number; setting and displaying dynamic analysis steps; setting boundary conditions; automatically setting contact attributes and contact pairs between metal powder balls and between the balls and the side wall of the mold; and solving, calculating and post-processing. According to the method, a large amount of complex finite element modeling work such as generation and assembly of a multi-particle part, grid division and contact setting is automatically completed, the modeling efficiency is greatly improved, the modeling correctness is guaranteed, the micro-mechanical characteristics of powder pressing are comprehensively analyzed, and the method is suitable for large-scale popularization and application. And the quantitative relation between the compact density and the impact energy per unit mass is accurately established, so that the purpose of predicting the high-speed pressing performance of the metal powder is achieved.

A comprehensive machine-learning algorithm, namely a Multi-Fidelity Neural Network (MFNN) architecture, is disclosed for data-driven constitutive meta-modelling of complex fluids. The physics-based neural networks are informed by underlying rheological constitutive models through synthetic generation of low-fidelity model-based data points.