CN116090279B - In-situ finite element simulation method for stress state of two-end clamped beams based on mixed reality - Google Patents
In-situ finite element simulation method for stress state of two-end clamped beams based on mixed reality Download PDFInfo
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Abstract
The invention discloses a mixed reality-based two-end clamped beam stress state in-situ finite element simulation method, which comprises the steps of firstly, performing finite element simulation pre-calculation on a desktop end of an engineering component; extracting finite element simulation data; regenerating finite element simulation data; finite element simulation data isomerism; the Unity load carries finite element simulation model and data; mixed reality development and packaging; the Visual Studio compiling project is in ARM64 format and is connected with Hollolens 2 for release; and (3) wearing Hollolens 2 equipment on site, and checking finite element simulation results of the stress state of the engineering component in situ. The invention solves the problem that finite element simulation is difficult to perform in-situ analysis by combining with the site conditions of the real engineering components, and realizes in-situ analysis of finite element simulation results based on the site conditions of the real engineering components. The invention can provide force field reference for the design, construction and operation of engineering components, and provides a more efficient and practical method for the force field simulation and analysis in the fields of civil engineering and intelligent construction.
Description
Technical Field
The invention relates to the field of civil engineering and intelligent construction, in particular to a mixed reality-based in-situ finite element simulation method for the stress state of a two-end clamped beam.
Background
Finite element simulation is widely and deeply applied to the fields of civil engineering and intelligent construction for a long time as a common technique of numerical simulation. Although the finite element simulation tools have strong functions at present, the preprocessing, solving and post-processing flows of the whole finite element simulation are developed based on a desktop end program, and a certain challenge is caused to the full utilization of the finite element simulation tools. The traditional finite element simulation is carried out in a purely virtual environment, so that human perception of real space such as scale, direction and the like is isolated; and the traditional finite element simulation process is separated from a real engineering component, so that in-situ analysis of finite element simulation results is difficult to be carried out by combining site conditions of the real engineering component. Therefore, how to carry out in-situ stress state finite element simulation on the engineering component based on the site conditions of the real engineering component has important practical significance.
MR (mixed reality) technology is an emerging technology in the fields of physical and digital interaction, and can create a new environment and visualization by combining real and virtual worlds to form a mixed reality space combining people, computers and environments, so that people can strengthen understanding of the real environment by combining computer digital information. The physical and digital objects can coexist in the new visual environment, and the virtual world and the real world can be subjected to model interaction and information acquisition in the environment, so that the interaction between the virtual world and the real world is realized, and the sense of reality of user experience is enhanced. The combination of finite element simulation and MR can display virtual simulation result information in a two-dimensional display screen in a real three-dimensional scene, so that visual interaction between digital space virtual information and a real environment is realized. The method is applied to the fields of civil engineering and intelligent construction, and can be used for observing and analyzing finite element simulation results by combining real engineering components from different angles by taking field conditions of the real engineering components as references and combining the real components in combination with finite element simulation technology, and carrying out in-situ mechanical simulation and analysis on the real engineering components so as to realize visualization of force fields.
Disclosure of Invention
In order to realize in-situ analysis of finite element simulation results based on site conditions of real engineering components by utilizing a finite element simulation technology and an MR technology, the invention provides a mixed reality-based in-situ finite element simulation method for stress states of two-end clamped beams, which comprises the following steps:
step 1, finite element simulation pre-calculation of the engineering component desktop end.
And 2, finite element simulation data extraction.
And 3, regenerating the finite element simulation data.
And 4, finite element simulation data isomerism.
And 5, loading the finite element simulation model and the data by the unity.
And 6, mixed reality development and packaging.
And 7, compiling the project into ARM64 format and connecting Hollolens 2 for release.
And 8, wearing Hollolens 2 equipment on site, and checking finite element simulation results of the stress state of the engineering component in situ.
Further, in step 1, the following steps may be sequentially performed in the Abaqus software:
step 1.1: determining physical attribute parameters and state attribute parameters of the engineering component;
step 1.2: creating an engineering component finite element simulation analysis model in Abaqus;
step 1.3: and obtaining the engineering component Abaqus finite element simulation result data.
Further, in step 2, the following steps may be sequentially performed:
step 2.1: modifying Python script configuration file parameters for finite element simulation data extraction;
step 2.2: running a data extraction script on an Abaqus kernel command line interface of the integrated PythonaDE;
step 2.3: the odb2vtk script is utilized to convert the finite element simulation data in the odb format into a vtu data format based on an XML unstructured grid.
Further, in step 3, the following steps may be sequentially performed in the pycharmppython ide:
step 3.1: debugging the VTK toolkit in the PyCharmPython IDE;
step 3.2: and (3) regenerating the data file obtained in the step 2.3 by using a VTK kit.
Further, in step 4, the following steps may be sequentially performed in the ParaView kit:
step 4.1: reconstructing the finite element simulation model of the engineering component in a ParaView tool kit based on the VTK, and reflecting the characteristics of grids, materials and the like;
step 4.2: finite element simulation grid data of engineering components are stored in a unified topology and data is exported in a VTK-based ParaView toolkit.
Further, in step 5, the following steps may be sequentially performed in Unity:
step 5.1: importing the engineering component finite element simulation model and the data exported in the step 4.2 into Unity;
step 5.2: finite element simulation data legends are created in Unity using the preform files.
Further, in step 6, the following steps may be sequentially performed in Unity:
step 6.1: importing a Microsoft MRTK toolkit into Unity;
step 6.2: fit mixed reality in Unity and create a scene.
Further, in step 7, the saved item is opened with visual studio, compiled into a format appropriate to hollens 2 (ARM 64 format), and deployed into an installation package. Connecting Holoins 2, deploying and debugging the use environment of the Holoins 2, setting Holoins as a portal using Windows equipment, connecting the Holoins 2 equipment through Wi-Fi, and carrying out project release.
Further, in step 8, hollens 2 equipment is worn on the engineering site, and the equipment can move in the real space at will, and with reference to the real engineering components, the real components are observed and analyzed by combining finite element analysis results from different angles, and in-situ mechanical simulation and analysis are performed on the engineering components, so that the visualization of the force field is realized.
The invention has the advantages and positive effects that:
(1) The method adopts the modes of Abaqus+PyCharmPython IDE+VTK toolkit+ParaView toolkit to realize the extraction, regeneration and isomerism of finite element simulation model data and result data;
(2) The method comprises the steps of packaging mass finite element simulation model data and result data which are extracted, regenerated and heterogeneous into Hollolens 2 equipment, displaying virtual model information in a two-dimensional display screen in a real three-dimensional scene, carrying out in-situ mechanical simulation and analysis on engineering components, and realizing visualization of force fields so as to solve the practical problem that in-situ analysis on finite element simulation results is difficult to be carried out in combination with site conditions of real engineering components.
Based on the method, a mixed reality-based two-end clamped beam stress state in-situ finite element simulation method is utilized, various digital technologies are combined and applied to two-end clamped beam stress state in-situ finite element simulation, visual interaction between digital space virtual information and a real environment is achieved, meanwhile, real engineering components can be used as references, the real components are observed and analyzed through combining finite element analysis results from different angles, visualization of force fields is achieved, and in-situ analysis of finite element simulation results is achieved based on site conditions of the real engineering components. The method is convenient for engineers to analyze the stress state of engineering components, provides force field references for the design, construction and operation and maintenance of engineering components or engineering structures, ensures the structural safety of buildings and structures, and promotes the sustainable development of civil engineering and intelligent building.
Drawings
The foregoing and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative only and not limiting of the invention, wherein:
fig. 1 is a flow chart of a method for in-situ finite element simulation of a stress state of a two-end clamped beam based on mixed reality.
Fig. 2 is a diagram of engineering component Abaqus finite element simulation result data.
FIG. 3 is a diagram of the odb2vtkPython script profile parameters.
FIG. 4 is an exemplary diagram of an Abaqus kernel running data extraction script invoked at an Abaqus kernel command line interface.
FIG. 5 is an exemplary diagram of the data format conversion by the odb2vtkPython script.
Fig. 6 is an exemplary diagram of debugging a VTK toolkit in a pcharmpythonde.
FIG. 7 is an exemplary diagram of invoking a VTK toolkit to regenerate finite element simulation data.
FIG. 8 is an exemplary diagram of mesh, material reconstruction of a finite element simulation model of an engineering component by the ParaView toolkit.
FIG. 9 is an exemplary diagram of a Unity engine rendering engineering component finite element simulation result graphics.
FIG. 10 is an exemplary diagram of a finite element simulation data diagram in a Unity engine.
FIG. 11 is an exemplary diagram of adapting MR and creating items and different scenarios in Unity.
Fig. 12 is an illustration of an example of wearing the hollens 2 device on an engineering site.
Fig. 13 is a diagram of an example of a holonens 2 based force field visualization.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the invention provides a mixed reality-based two-end clamped beam stress state in-situ finite element simulation method, which comprises the following steps:
step 1, finite element simulation pre-calculation of the engineering component desktop end.
And 2, finite element simulation data extraction.
And 3, regenerating the finite element simulation data.
And 4, finite element simulation data isomerism.
And 5, loading the finite element simulation model and the data by the unity.
And 6, mixed reality development and packaging.
And 7, compiling the project into ARM64 format and connecting Hollolens 2 for release.
And 8, wearing Hollolens 2 equipment on site, and checking finite element simulation results of the stress state of the engineering component in situ.
Further, in step 1, the following steps may be sequentially performed in the Abaqus software:
step 1.1: determining physical attribute parameters and state attribute parameters of the engineering component according to the actual condition of the actual engineering component, wherein the physical attribute parameters and the state attribute parameters mainly comprise geometric dimensions, material attributes, load conditions and constraint conditions;
step 1.2: the pretreatment process of the finite element simulation analysis in Abaqus by using the related parameters of the step 1.1 mainly comprises the following steps: creating a component, defining materials, defining section attributes, assembling, defining analysis steps, defining contacts, designating loads, dividing grids, and building a finite element simulation analysis model of an engineering component;
step 1.3: and submitting the operation in Abaqus, performing engineering component finite element simulation calculation, as shown in fig. 2, and acquiring engineering component Abaqus finite element simulation result data.
Further, in step 2, the following steps may be sequentially performed:
step 2.1: modifying the parameters of the odb2vtkPython script configuration file for finite element simulation data extraction, as shown in FIG. 3, the contents to be modified mainly include: the method comprises the steps of (1) positioning an Abaqus finite element simulation result data file in a computer and outputting the position of the Abaqus finite element simulation result data file in the computer after data extraction, wherein the Abaqus finite element simulation result data divides the number of data blocks, and the number of frames, analysis steps and examples of the Abaqus finite element simulation model;
step 2.2: sequentially running 'importsys', 'sys.path.application (' script file address ')', 'importos', 'importodb 2 vtk', 'fromod b2 vtkimport' instructions on an Abaqus kernel command line interface of the integrated PythonaDE, and calling the Abaqus kernel to run a data extraction script as shown in figure 4;
step 2.3: the instruction "ConvertOdb2Vtk ('configuration file address')" is run on the Abaqus kernel command line interface of the integrated PythonADE, and the odb2vtkPython script is run to convert the finite element simulation data in the odb format into a vtu data format based on an XML unstructured grid, as shown in fig. 5.
Further, in step 3, the following steps may be sequentially performed in the pycharmppython ide:
step 3.1: installing "VTK-7.1.1-cp36-cp36m-win_amd64.Whl", "numpy-1.12.1+mkl-cp 36-m-win_amd64. Whl", "tracks-4.6.0-cp 36-cp36m-win_amd64.Whl", "mayavi-4.5.0+vtk71-cp36-cp36m-win_amd64.Whl", "PyQt4-4.11.4-cp36-cp36m-win_amd64.Whl" library files, respectively, debugging a VTK toolkit in a PyCharmPythonIDE, as shown in FIG. 6;
step 3.2: inputting an 'inportvtkmodules. Alasvtk' instruction into the PyCharmPythonoide, calling and regenerating the vtu format data file obtained in the step 2.3 by using the VTK toolkit, and checking the correctness of the data extraction in the step 2.3, as shown in figure 7.
Further, in step 4, the following steps may be sequentially performed in the ParaView kit:
step 4.1: importing finite element simulation data in a vtu format, which is checked to be correct in step 3.2, into a ParaView kit based on the VTK, calling a powerful visualization module of the Paraview kit, reconstructing a finite element simulation model of an engineering component, and embodying the characteristics of grids, materials and the like, as shown in figure 8;
step 4.2: and calling a format conversion module in a ParaView toolkit based on the VTK, storing the finite element simulation grid and the material data of the engineering component in a unified topological structure, and exporting the data.
Further, in step 5, the following steps may be sequentially performed in Unity:
step 5.1: creating a 3D project in the Unity, importing the engineering component finite element simulation model and data derived in the step 4.2 into the Unity engine as a resource package, calling a computer GPU memory by the Unity engine to directly read the model and the data, and then displaying an engineering component finite element simulation result graph on a screen, as shown in FIG. 9;
step 5.2: calling a prefabricated body module in Unity, adding 'Cube' in a project scene, dividing 14 gradient intervals according to a numerical interval of a finite element simulation result of an engineering component, uniformly creating 14 corresponding material balls according to color gradients from red '255, 0' to blue '0, 255', endowing each material ball onto the prefabricated body 'Cube', marking the represented numerical value near the prefabricated body added with the material balls by adding text, and creating a finite element simulation data legend, as shown in fig. 10.
Further, in step 6, the following steps may be sequentially performed in Unity:
step 6.1: importing a Microsoft MRTK toolkit in Unity by using a MixedRealFeatureTool tool, wherein the Microsoft MRTK toolkit mainly comprises "MixedRealToolkExmples", "MixedRealToolkToolkExtension", "MixedReality ToolkitUtilities" and "MixedRealToolkToolkTools" resource packages as shown in FIG. 11;
step 6.2: the method comprises the steps of adapting mixed reality in Unity, creating a scene, and realizing the functions of grabbing, moving, rotating and zooming finite element simulation models and data in a Unity engine, wherein scripts of 'NearInteractionGrabbable. Cs', 'MANUFACTURING Handler. Cs', 'BoundDingBox. Cs', 'Interactable. Cs' are required to be mounted in the Unity engine.
Further, in step 7, the saved item is opened with visual studio, compiled into a format appropriate to hollens 2 (ARM 64 format), and deployed into an installation package. Connecting Holoins 2, deploying and debugging the use environment of the Holoins 2, setting Holoins as a portal using Windows equipment, connecting the Holoins 2 equipment through Wi-Fi, and carrying out project release.
Further, in step 8, the hollens 2 device is worn on the engineering site, as shown in fig. 12, and the device can be moved in the real space at will, with reference to the real engineering component, the real component is observed and analyzed from different angles in combination with the finite element analysis result, and the engineering component is subjected to in-situ mechanical simulation and analysis, so as to realize the visualization of the force field, as shown in fig. 13.
The in-situ finite element simulation method based on the stress state of the two-end clamped beams provided by the invention is used for applying the finite element simulation analysis method and the mixed reality technology to the simulation and analysis of the civil engineering and the intelligently-built force field; extracting, regenerating and isomerising finite element simulation model data and result data are achieved by using Abaqus, odb2vtk script, pyCharmPythonIDE, VTK tool kit and ParaView tool kit, and in-situ analysis of finite element simulation results based on site conditions of real engineering components is achieved by means of Unity, visualStudio software and Hollolens 2 equipment. The method has the advantages that visual interaction between digital space virtual information and a real environment is realized, real engineering components can be used as references, real components are observed and analyzed by combining finite element analysis results from different angles, visualization of a force field is realized, in-situ analysis of finite element simulation results based on site conditions of real two-end supporting beams is realized, and the problem that in-situ analysis is difficult to be carried out by combining the site conditions of the real two-end supporting beams by finite element simulation is solved; the invention is convenient for engineers to analyze the stress state of the two-end clamped beams, provides force field references for the design, construction and operation and maintenance of engineering components or engineering structures, ensures the structural safety of the building and the construction, and promotes the sustainable development of civil engineering and intelligent building.
The present invention is not limited to the above embodiments, and any person can obtain other products in various forms under the teaching of the present invention, however, any changes in shape or structure of the products are included in the scope of protection of the present invention, and all the products having the same or similar technical solutions as the present application are included in the present invention.
Claims (1)
1. The in-situ finite element simulation method for the stress state of the two-end clamped beams based on mixed reality is characterized by comprising the following steps of:
step 1, finite element simulation pre-calculation of a desktop end of an engineering component;
step 2, finite element simulation data extraction;
step 3, regenerating finite element simulation data;
step 4, finite element simulation data isomerism;
step 5, loading finite element simulation models and data by unity;
step 6, mixed reality development and packaging;
step 7, the visual Studio compiling item is in ARM64 format and is connected with Hollolens 2 for release;
step 8, field wearing Hollolens 2 equipment, and checking finite element simulation results of stress states of engineering components in situ;
in step 1, the following steps are performed in the Abaqus software in sequence:
step 1.1: determining physical attribute parameters and state attribute parameters of the engineering component;
step 1.2: creating an engineering component finite element simulation analysis model in Abaqus;
step 1.3: acquiring the simulation result data of the engineering component Abaqus finite element;
in step 2, the following steps may be sequentially performed:
step 2.1: modifying Python script configuration file parameters for finite element simulation data extraction;
step 2.2: running a data extraction script on an Abaqus kernel command line interface integrating Python ADE;
step 2.3: converting the finite element simulation data in the odb format into vtu data format based on an XML unstructured grid by utilizing an odb2vtk script;
in step 3, the following steps may be performed in sequence in PyCharm Python IDE:
step 3.1: debug VTK toolkit in PyCharm Python IDE;
step 3.2: regenerating the data file obtained in the step 2.3 by using a VTK kit, and checking the correctness of the data extraction in the step 2.3;
in step 4, the following steps are sequentially performed in the ParaView toolkit:
step 4.1: importing finite element simulation data in a vtu format which is checked to be correct in step 3.2 in a ParaView tool kit based on the VTK, reconstructing a finite element simulation model of an engineering component, and reflecting the characteristics of grids and materials;
step 4.2: calling a format conversion module in a ParaView toolkit based on the VTK, storing finite element simulation grid data and material data of an engineering component in a unified topological structure, and exporting data;
in step 5, the following steps are sequentially performed in Unity:
step 5.1: importing the engineering component finite element simulation model and the data exported in the step 4.2 into Unity;
step 5.2: creating a finite element simulation data legend in Unity by using the preform file;
in step 6, the following steps are sequentially performed in Unity:
step 6.1: importing a Microsoft MRTK toolkit into Unity;
step 6.2: adapting mixed reality in Unity and creating a scene;
in step 7, the saved items are opened by Visual Studio, compiled into a format suitable for hollens 2, and distributed into installation packages; connecting Hololens2, deploying and debugging the use environment of the Hololens2, setting the Hololens2 as a Windows device portal, connecting the Hololens2 device through Wi-Fi, and carrying out project release;
in step 8, hollens 2 equipment is worn on the engineering site, the equipment moves in the real space at will, the real engineering component is taken as a reference, the real component is observed and analyzed from different angles in combination with the finite element analysis result, and the engineering component is subjected to in-situ mechanical simulation and analysis, so that the visualization of the force field is realized.
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| Intelligent Construction and Management of Landscapes through Building Information Modeling and Mixed Reality;Xuefeng Zhao等;Applied Sciences;第1-15页 * |
| 基于HoloLens的有限元分析变形结果可视化研究;徐劲力等;系统仿真学报;第109-117页 * |
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