55 results about "Fe model" patented technology

A computer-aided method for carrying out the structural design of a part subjected to damages having significant effects on its structural integrity, such as an aircraft fuselage section subjected to a PBR event, comprising steps of: Obtaining FE models that include all the relevant information for an optimization analysis for the un-damaged part and for at least one possible damaged part; Defining at least one design variable of said part and at least one design constraint and one load case for said un-damaged part and for said damaged part; Providing at least one simulation module for analyzing one or more failure modes of said part; Iteratively modifying the design variables of said part for the purpose of optimizing said target function by analyzing simultaneously said un-damaged part and said at least one damaged part using said at least one simulation module.

A method for hydrocarbon management of a reservoir is provided. The method includes generating a model of a reservoir comprising a plurality of homogenized mixed finite elements in an unstructured computational mesh. The unstructured computational mesh may be coarsened to form a plurality of coarser computational meshes in the model. A convection-diffusion subsurface process may be evaluated on a coarsest computation mesh. A result may be transferred from the coarsest computational mesh to a finest computational mesh, and a performance parameter for the hydrocarbon reservoir may be predicted from the model. The predicted performance parameter may be used for hydrocarbon management of the reservoir.

A system and method is provided for generating a finite element (FE) model of an anatomical structure based on a fitted model (340) of the anatomical structure and association data. A segmentation model (310) may be provided for segmenting the anatomical structure. Association data may be obtained which associates a segmentation model part (315) of the segmentation model (310) with a mesh property, the segmentation model part (315) representing a pre-determined anatomical region of interest. The segmentation model may be applied to a medical image (320) of a subject, thereby obtaining a fitted model (340) providing a segmentation of the anatomical structure (330). The finite element model (350) may then be generated based on the fitted model (340) and the association data, said generating comprising meshing a finite element model part of the finite element model in accordance with the mesh property, the finite element model part corresponding with the pre-determined anatomical region of interest. Advantageously, this may result in an efficient generation of the FE model needing fewer manual iterations and / or alterations in the model or in the mesh.

The invention discloses a method for simulating water-air two-phase homogeneous flow in a water pipeline based on a finite volume method. The method is based on a non-conservative form; the model pipeline is discretized in time and space by the finite volume method; Then, through the MUSCL-Hancoke format containing TVD, the reconstructed flow variables are obtained to have second-order precision; then, the Riemann solution at the internal interface of the model is solved to obtain the calculated interface flux value; then, for the boundary conditions of the model, Use the Newton iteration method to use the Riemann invariant to wait until the second-order boundary value; then, enter the source item in the model, and use the numerical method to discretize it to make it have second-order accuracy; finally, based on the initially given parameters (free Gas content, pure water water hammer wave velocity under normal pressure, etc.), to simulate the pressure fluctuation in the pipeline at any time. The results show that the calculation accuracy and efficiency of the model are higher than those of the traditional conservative homogeneous flow model.

The invention discloses a model real-time maintaining method of a power grid regulation and control model center. The method includes the steps of classifying models on the levels of model objects andmodel object properties, establishing a model maintaining authority management method with a plant station as the granularity, completing the maintaining authority judgment through model service of the model center to realize distributed source end maintaining of the models within the jurisdiction range of the model center, establishing the consistency commit mechanism between the model center and an access subsystem, and coordinating the public model commit state between the model center and the access subsystem to realize the real-time maintaining of the models of the model center and the access subsystem. The distributed type source end maintaining requirements of the subsystem models are met, the maintaining complexity of the model center models is reduced, the updating timelines andexpandability of the model center models are improved, the strong consistency of power grid models of an all-stage access model center system is ensured, and bottom level model data support is provided for various subsequent online and offline applications at the model center.

The invention discloses an optimization method for the pretightening force of a brittle sandwich structure bolt, and belongs to the technical field of mechanical simulation optimization. The method comprises the following steps of: 1, constructing a three-dimensional assembly model of the brittle sandwich structure in finite element software, and defining assembly parameters of the three-dimensional assembly model; 2, applying a pre-tightening force in the model according to a damage critical point to obtain a stress distribution state of a fastening surface; 3, according to stress distribution, the pre-tightening force and the loading sequence of the screws at the angular positions and the side positions are optimized; 4, respectively judging whether the stress distribution after the pre-tightening force optimization and the loading sequence optimization is uniform or not, if so, entering the next step, and otherwise, returning to the step 3 for re-optimization; and 5, outputting an optimal pre-tightening force loading value and an optimal loading sequence. According to the method, the simulation model of the connecting piece is constructed in the connecting process of the brittle sandwich structure, the mapping relation between the fastening torque and the pre-tightening force is constructed through experiments, and finally the effect of optimizing the pre-tightening force of the brittle sandwich structure screw is achieved.

The invention provides a method for adjusting the basic serialized computerized combined modeling of rectangular slab continuous casting equipment. The adjustment method includes: dividing and defining the foundation of the rectangular slab continuous casting equipment, so as to distinguish between the primitives of the large-bag turntable and the external parts. Arc tangent primitives, slag flushing ditch entrance primitives, slag flushing ditch transition section primitives and continuous casting cooling bed equipment basic primitives; , the transition section of the slag flushing ditch and the basic primitives of the continuous casting cooling bed equipment are defined and the computerized combination is finely adjusted; Summarize and calculate the reinforcing bars in the groove transition element and / or the basic elements of the continuous casting cooling bed equipment, and lock the reinforcing bars for the summary calculation. The invention makes the steel bars meet the requirements of the travel law design and specification in the foundation, and draws and edits the stressed steel bars in the model and compares the drawing data by hand to form a positive value.

The invention provides a method for converting an arbitrary coordinate conversion system of BIM into a construction coordinate system. The method comprises the steps of calculating azimuth angles and various side lengths between known control points and axis intersections separately by using the known control points in the construction coordinate system and known axis intersection coordinates in a construction plane layout chart; grabbing arbitrary coordinate values of the axis intersections in the arbitrary coordinate system of a BIM model, calculating arbitrary azimuth angles and distances of the axis intersections and reversely deducing the coordinates of the control points in the arbitrary coordinate system; and carrying out back calculation on arbitrary coordinates of various structures grabbed in the BIM model and arbitrary coordinate values of the control points, calculating the numerical values, such as the included angles and the side lengths, between arbitrary coordinate points of the structures and the control points and calculating the coordinates of various structures grabbed in the BIM model, thereby meeting site construction layout.