FEM Workbench/ja: Difference between revisions

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{{TOCright}}
{{TOCright}}


<span id="Introduction"></span>
==はじめに==
==はじめに==


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[[Image:FemWorkbench.jpg|300px]]
[[Image:FemWorkbench.jpg|300px]]


<span id="Workflow"></span>
==ワークフロー==
==ワークフロー==


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{{Caption|Workflow of the FEM Workbench; the workbench calls two external programs to perform meshing of a solid object, and perform the actual solution of the finite element problem}}
{{Caption|Workflow of the FEM Workbench; the workbench calls two external programs to perform meshing of a solid object, and perform the actual solution of the finite element problem}}


<span id="Menu:_Model"></span>
==メニュー:モデル==
==メニュー:モデル==


* [[Image:FEM_Analysis.svg|32px]] [[FEM_Analysis|Analysis container]]: Creates a new container for a mechanical analysis. If a solid is selected in the tree view before clicking on it, the meshing dialog will be opened next.
* [[Image:FEM_Analysis.svg|32px]] [[FEM_Analysis|Analysis container]]: Creates a new container for a mechanical analysis. If a solid is selected in the tree view before clicking on it, the meshing dialog will be opened next.


<span id="Materials"></span>
===材料===
===材料===


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* [[Image:FEM_MaterialEditor.svg|32px]] [[FEM_MaterialEditor|Material editor]]: Lets you open the material editor to edit materials.
* [[Image:FEM_MaterialEditor.svg|32px]] [[FEM_MaterialEditor|Material editor]]: Lets you open the material editor to edit materials.


<span id="Element_Geometry"></span>
===要素の幾何学===
===要素の幾何学===


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* [[Image:FEM_ElementFluid1D.svg|32px]] [[FEM_ElementFluid1D|Fluid section for 1D flow]]: Used to create fluid section element for pneumatic and hydraulic networks.
* [[Image:FEM_ElementFluid1D.svg|32px]] [[FEM_ElementFluid1D|Fluid section for 1D flow]]: Used to create fluid section element for pneumatic and hydraulic networks.


<span id="Electromagnetic_Constraints"></span>
<div class="mw-translate-fuzzy">
=== Electrostatic Constraints ===
=== Electrostatic Constraints ===
</div>

* [[Image:FEM_CompEmConstraints.png|48px]] [[FEM_CompEmConstraints|Electromagnetic constraints]]: This is an icon menu in the FEM Constraints toolbar that holds the following constraints:

:* [[Image:FEM_ConstraintElectrostaticPotential.svg|32px]] [[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]: Used to define electrostatic potential.

:* [[Image:FEM_ConstraintCurrentDensity.svg|32px]] [[FEM_ConstraintCurrentDensity|Constraint current density]]: Used to define a current density. {{Version|1.0}}


* [[Image:FEM_ConstraintElectrostaticPotential.svg|32px]] [[FEM_ConstraintElectrostaticPotential|Constraint electrostatic potential]]: Used to define electrostatic potential.
:* [[Image:FEM_ConstraintMagnetization.svg|32px]] [[FEM_ConstraintMagnetization|Constraint magnetization]]: Used to define a magnetization. {{Version|1.0}}


<span id="Fluid_Constraints"></span>
===流体の制約===
===流体の制約===


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* [[Image:FEM_ConstraintTransform.svg|32px]] [[FEM_ConstraintTransform|Constraint transform]]: Used to define a transform constraint on a face.
* [[Image:FEM_ConstraintTransform.svg|32px]] [[FEM_ConstraintTransform|Constraint transform]]: Used to define a transform constraint on a face.


<span id="Mechanical_Constraints"></span>
===機械的な制約===
===機械的な制約===


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* [[Image:FEM_ConstraintSelfWeight.svg|32px]] [[FEM_ConstraintSelfWeight|Constraint self weight]]: Used to define a gravity acceleration acting on a model.
* [[Image:FEM_ConstraintSelfWeight.svg|32px]] [[FEM_ConstraintSelfWeight|Constraint self weight]]: Used to define a gravity acceleration acting on a model.


<span id="Thermal_Constraints"></span>
===熱的制約===
===熱的制約===


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* [[Image:FEM_ConstantVacuumPermittivity.svg|32px]] [[FEM_ConstantVacuumPermittivity|Constant vacuum permittivity]]: Used to overwrite the [https://en.wikipedia.org/wiki/Vacuum_permittivity permittivity of vacuum] with a custom value. {{Version|0.19}}
* [[Image:FEM_ConstantVacuumPermittivity.svg|32px]] [[FEM_ConstantVacuumPermittivity|Constant vacuum permittivity]]: Used to overwrite the [https://en.wikipedia.org/wiki/Vacuum_permittivity permittivity of vacuum] with a custom value. {{Version|0.19}}


<span id="Menu:_Mesh"></span>
==メニュー:メッシュ==
==メニュー:メッシュ==


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* [[Image:FEM_FemMesh2Mesh.svg|32px]] [[FEM_FemMesh2Mesh|FEM mesh to mesh]]: Convert the surface of a FEM mesh to a mesh.
* [[Image:FEM_FemMesh2Mesh.svg|32px]] [[FEM_FemMesh2Mesh|FEM mesh to mesh]]: Convert the surface of a FEM mesh to a mesh.


<span id="Menu:_Solve"></span>
==メニュー:Solve==
==メニュー:Solve==


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* [[Image:FEM_EquationElasticity.svg|32px]] [[FEM_EquationElasticity|Elasticity equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to perform mechanical analyses.
* [[Image:FEM_EquationElasticity.svg|32px]] [[FEM_EquationElasticity|Elasticity equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to perform mechanical analyses.


* [[Image:FEM_CompEmEquations.png|48px]] [[FEM_CompEmEquations|Electromagnetic equations]]: This is an icon menu in the FEM Equations toolbar that holds the following equations:
* [[Image:FEM_EquationElectricforce.svg|32px]] [[FEM_EquationElectricforce|Electricforce equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to calculate the electric force on surfaces. {{Version|0.19}}


* [[Image:FEM_EquationElectrostatic.svg|32px]] [[FEM_EquationElectrostatic|Electrostatic equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to perform electrostatic analyses.
:* [[Image:FEM_EquationElectrostatic.svg|32px]] [[FEM_EquationElectrostatic|Electrostatic equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to perform electrostatic analyses.

:* [[Image:FEM_EquationElectricforce.svg|32px]] [[FEM_EquationElectricforce|Electricforce equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to calculate the electric force on surfaces. {{Version|0.19}}

:* [[Image:FEM_EquationMagnetodynamic.svg|32px]] [[FEM_EquationMagnetodynamic|Magnetodynamic equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to calculate magnetodynamics. {{Version|1.0}}

:* [[Image:FEM_EquationMagnetodynamic2D.svg|32px]] [[FEM_EquationMagnetodynamic2D|Magnetodynamic 2D equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to calculate magnetodynamics in 2D. {{Version|1.0}}


* [[Image:FEM_EquationFlow.svg|32px]] [[FEM_EquationFlow|Flow equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to perform flow analyses.
* [[Image:FEM_EquationFlow.svg|32px]] [[FEM_EquationFlow|Flow equation]]: Equation for the [[Image:FEM_SolverElmer.svg|32px]] [[FEM_SolverElmer|Solver Elmer]] to perform flow analyses.
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* [[Image:FEM_SolverRun.svg|32px]] [[FEM_SolverRun|Run solver calculations]]: Runs the selected solver of the active analysis.
* [[Image:FEM_SolverRun.svg|32px]] [[FEM_SolverRun|Run solver calculations]]: Runs the selected solver of the active analysis.


<span id="Menu:_Results"></span>
==メニュー:結果==
==メニュー:結果==


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* [[Image:FEM_PostFilterClipRegion.svg|32px]] [[FEM_PostFilterClipRegion|Region clip filter]]: Used to clip a field with a sphere or a plane cutting through the model.
* [[Image:FEM_PostFilterClipRegion.svg|32px]] [[FEM_PostFilterClipRegion|Region clip filter]]: Used to clip a field with a sphere or a plane cutting through the model.

* [[Image:FEM_PostFilterContours.svg|32px]] [[FEM_PostFilterContours|Contours filter]]: Used to display iso-lines (for analyses in 2D) or iso-contours. {{Version|1.0}}


* [[Image:FEM_PostFilterDataAlongLine.svg|32px]] [[FEM_PostFilterDataAlongLine|Line clip filter]]: Used to plot the values of a field along a specified line.
* [[Image:FEM_PostFilterDataAlongLine.svg|32px]] [[FEM_PostFilterDataAlongLine|Line clip filter]]: Used to plot the values of a field along a specified line.
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* [[Image:FEM_CompPostCreateFunctions.png|48px]] [[FEM_PostCreateFunctions|Filter functions]]: This is an icon menu in the FEM Results toolbar that holds the following commands:
* [[Image:FEM_CompPostCreateFunctions.png|48px]] [[FEM_PostCreateFunctions|Filter functions]]: This is an icon menu in the FEM Results toolbar that holds the following commands:


:* [[Image:Fem-post-geo-plane.svg|32px]] [[FEM_PostCreateFunctionPlane|Filter function plane]]: Defines that the result mesh is cut with a plane.
:* [[Image:FEM_PostCreateFunctionPlane.svg|32px]] [[FEM_PostCreateFunctionPlane|Filter function plane]]: Defines that the result mesh is cut with a plane.


:* [[Image:Fem-post-geo-sphere.svg|32px]] [[FEM_PostCreateFunctionSphere|Filter function sphere]]: Defines that the result mesh is cut with a sphere.
:* [[Image:FEM_PostCreateFunctionSphere.svg|32px]] [[FEM_PostCreateFunctionSphere|Filter function sphere]]: Defines that the result mesh is cut with a sphere.


<span id="Menu:_Utilities"></span>
==メニュー:ユーティリティ==
==メニュー:ユーティリティ==


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* [[Image:FEM_Examples.svg|32px]] [[FEM_Examples|Open FEM examples]]: Open the GUI to access FEM examples.
* [[Image:FEM_Examples.svg|32px]] [[FEM_Examples|Open FEM examples]]: Open the GUI to access FEM examples.


<span id="Context_Menu"></span>
==コンテキストメニュー==
==コンテキストメニュー==


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* [[Image:FEM_MeshDisplayInfo.svg|32px]] [[FEM_MeshDisplayInfo|Display FEM mesh info]]: Displays basic statistics of existing mesh - number of nodes and elements of each type.
* [[Image:FEM_MeshDisplayInfo.svg|32px]] [[FEM_MeshDisplayInfo|Display FEM mesh info]]: Displays basic statistics of existing mesh - number of nodes and elements of each type.


<span id="Preferences"></span>
==環境設定==
==環境設定==


* [[Image:Std_DlgPreferences.svg|32px]] [[FEM_Preferences|Preferences...]]: Preferences available in FEM Tools.
* [[Image:Std_DlgPreferences.svg|32px]] [[FEM_Preferences|Preferences...]]: Preferences available in FEM Tools.


<span id="Information"></span>
==リンク ==
==リンク ==
[[FEM_Install | FEMインストール]]をクリックすると、動作中のFEMモジュールを設定する方法の詳細が表示されます。
[[FEM_Install | FEMインストール]]をクリックすると、動作中のFEMモジュールを設定する方法の詳細が表示されます。

Revision as of 15:31, 25 February 2023

FEM workbench icon

はじめに

FEM Workbenchは、FreeCAD用の最新の有限要素解析(FEA)ワークフローを提供します。 主にこれは、分析を行うすべてのツールが1つのグラフィカルユーザーインターフェイス(GUI)に統合されていることを意味します。

ワークフロー

有限要素解析を実行する手順は次のとおりです。 #前処理:分析問題を設定する。

    1. ジオメトリのモデリング:FreeCADでジオメトリを作成するか、別のアプリケーションからジオメトリをインポートします。
    2. 分析を作成する。
      1. 幾何モデルのための有限要素メッシュの作成。
      2. 荷重や固定されたサポートなどの制約をモデルに追加する。
      3. 解析モデルに材料を追加する。

#Solving:FreeCAD内の外部ソルバーを使用して方程式系を解く。 #Postprocessing:FreeCAD内の解析結果を視覚化します。

FreeCAD 0.15以降、FEM WorkbenchはWindows、MacOSX、Linuxプラットフォームで使用できます。 ワークベンチは外部ソルバーを使用するため、手動セットアップの量は使用しているオペレーティングシステムによって異なります。 外部ツールの設定方法については、 FEM Installページを参照してください。

Workflow of the FEM Workbench; the workbench calls two external programs to perform meshing of a solid object, and perform the actual solution of the finite element problem

メニュー:モデル

  • Analysis container: Creates a new container for a mechanical analysis. If a solid is selected in the tree view before clicking on it, the meshing dialog will be opened next.

材料

要素の幾何学

Electrostatic Constraints

流体の制約

Geometrical Constraints

機械的な制約

  • Constraint force: Used to define a force in [N] applied uniformly to a selectable face in a definable direction.

熱的制約

Constraints without solver

Overwrite Constants

メニュー:メッシュ

  • FEM mesh region: Creates a localized area(s) to mesh which highly optimizes analysis time.
  • FEM mesh group: Groups and labels elements of a mesh (vertex, edge, surface) together, useful for exporting the mesh to external solvers.
  • Nodes set: Creates/defines a node set from FEM mesh.

メニュー:Solve

  • Solver CalculiX Standard: Creates a new solver for this analysis. In most cases the solver is created together with the analysis.
  • Solver Elmer: Creates the solver controller for Elmer. It is independent from other solver objects.
  • Solver Z88: Creates the solver controller for Z88. It is independent from other solver objects.

メニュー:結果

  • Show result: Used to display the result of an analysis.
  • Post pipeline from result: Used to add a new graphical representation of FEM analysis results (color scale and more display options).
  • Warp filter: Used to visualize the scaled deformed shape of the model.
  • Function cut filter: Used to display the results on a sphere or a plane cutting through the model.
  • Region clip filter: Used to clip a field with a sphere or a plane cutting through the model.
  • Filter functions: This is an icon menu in the FEM Results toolbar that holds the following commands:

メニュー:ユーティリティ

コンテキストメニュー

  • Clear FEM mesh: Deletes the mesh file from the FreeCAD file. Useful to make a FreeCAD file lighter.
  • Display FEM mesh info: Displays basic statistics of existing mesh - number of nodes and elements of each type.

環境設定

リンク

FEMインストールをクリックすると、動作中のFEMモジュールを設定する方法の詳細が表示されます。

The following pages explain different topics of the FEM Workbench.

FEM Install: a detailed description on how to set up the external programs used in the workbench.

FEM Mesh: further information on obtaining a mesh for finite element analysis.

FEM Solver: further information on the different solvers available in the workbench, and those that could be used in the future.

FEM CalculiX: further information on CalculiX, the default solver used in the workbench for structural analysis.

FEM Concrete: interesting information on the topic of simulating concrete structures.

Tutorials

チュートリアル

チュートリアル1 FEM CalculiXカンチレバー3D

Tutorial 2: FEM Tutorial; simple tension analysis of a structure.

Tutorial 3: FEM Tutorial Python; set up the cantilever example entirely through scripting in Python, including the mesh.

Tutorial 4: FEM Shear of a Composite Block; see the deformation of a block that is comprised of two materials.

Tutorial 5: Transient FEM analysis

Tutorial 6: Post-Processing of FEM Results with Paraview

Tutorial 7: FEM Example Capacitance Two Balls; Elmer's GUI tutorial 6 "Electrostatics Capacitance Two Balls" using FEM Examples.

Coupled thermal mechanical analysis tutorials by openSIM

Video tutorial 1: FEM video for beginner (including YouTube link)

Video tutorial 2: FEM video for beginner (including YouTube link)

Many video tutorials: anisim Open Source Engineering Software (in German)

Extending the FEM Workbench

The FEM Workbench is under constant development. An objective of the project is to find ways to easily interact with various FEM solvers, so that the end user can streamline the process of creating, meshing, simulating, and optimizing an engineering design problem, all within FreeCAD.

The following information is aimed at power users and developers who want to extend the FEM Workbench in different ways. Familiarity with C++ and Python is expected, and also some knowledge of the "document object" system used in FreeCAD is necessary; this information is available in the Power users hub and the Developer hub. Please notice that since FreeCAD is under active development, some articles may be too old, and thus obsolete. The most up to date information is discussed in the FreeCAD forums, in the Development section. For FEM discussions, advice or assistance in extending the workbench, the reader should refer to the FEM subforum.

The following articles explain how the workbench can be extended, for example, by adding new types of boundary conditions (constraints), or equations.

A developer's guide has been written to help power users in understanding the complex FreeCAD codebase and the interactions between the core elements and the individual workbenches. The book is hosted at github so multiple users can contribute to it and keep it updated.

Extending the FEM Workbench documentation