FEM MeshRegion/de: Difference between revisions
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<languages/> |
<languages/> |
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{{Docnav |
{{Docnav/de |
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|[[FEM_MeshBoundaryLayer|FEM |
|[[FEM_MeshBoundaryLayer/de|FEM NetzGrenzschicht]] |
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|[[FEM_MeshGroup|FEM |
|[[FEM_MeshGroup/de|FEM NetzGruppe]] |
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|[[FEM_Workbench|FEM]] |
|[[FEM_Workbench/de|FEM]] |
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|IconL=FEM_MeshBoundaryLayer.svg |
|IconL=FEM_MeshBoundaryLayer.svg |
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|IconR=FEM_MeshGroup.svg |
|IconR=FEM_MeshGroup.svg |
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}} |
}} |
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{{GuiCommand |
{{GuiCommand/de |
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|Name=FEM MeshRegion |
|Name=FEM MeshRegion |
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|Name/de=FEM Netzbereich |
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|MenuLocation= |
|MenuLocation=Netz → FEM mesh refinement |
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|Workbenches=[[FEM_Workbench/de|FEM]] |
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|SeeAlso=[[FEM_tutorial/de|FEM Anleitung]] |
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}} |
}} |
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<span id="Description"></span> |
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==Beschreibung== |
==Beschreibung== |
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Enables the user to set a localized set of meshing parameters by selecting a set of elements (vertex, edge, face) and applying the parameters to it. It is especially useful for refining meshes in areas of interest or areas where the solver will generate a stronger gradient of a variable. For example, it can be used to refine the mesh around stress-risers (sharp edges, holes, notches, ...) in mechanical analysis, or at areas of contraction in a fluid flow. |
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It is especially useful for refining meshes in areas of interest or areas where the solver will generate stronger gradient of a variable. For example, it can be used to refine the mesh around stress-risers (sharp edges, circles...) in mechanical analysis, or at areas of contraction in a fluid flow. |
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Refining the mesh has the advantage of enabling accurate simulation where needed, while allowing coarser mesh in the wider domain, thus drastically optimizing the computation time while maintaining meaningful solutions output. |
Refining the mesh has the advantage of enabling accurate simulation where needed, while allowing coarser mesh in the wider domain, thus drastically optimizing the computation time while maintaining meaningful solutions output. |
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<span id="Usage"></span> |
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==Anwendung== |
==Anwendung== |
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# To enable the function a mesh must be first provided [[Image: |
# To enable the function a [[Image:FEM_MeshGmshFromShape.svg|32px]] [[FEM_MeshGmshFromShape|FEM mesh from shape by Gmsh]] must be first provided. Select the Mesh object in the Model Tree and either press the {{Button|[[Image:FEM_MeshRegion.svg|32px]] [[FEM_MeshRegion|FEM mesh refinement]]}} button or use the {{MenuCommand|Mesh → [[Image:FEM_MeshRegion.svg|32px]] FEM mesh refinement}} menu option. |
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# Press the {{Button|Add}} button and select one or more of either ''faces'', ''edges'' or ''vertices'' in the [[3D_view|3D view]] to apply the mesh refinement to. The selected items will appear in the list of geometrical objects. The selection mode can be also set to ''Solid''. |
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#* Select the Mesh object in the Model Tree and press the [[Image:FEM_MeshRegion.svg|32px]] button. |
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#* Select the Mesh object in the Model Tree and select the {{MenuCommand|Mesh → [[Image:FEM_MeshRegion.svg|32px]] FEM mesh region}} option from the menu. |
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# Click the {{Button|OK}} button. |
# Click the {{Button|OK}} button. |
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# Close the task. |
# Close the task. |
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# Close the task. |
# Close the task. |
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Nachdem das Netz generiert wurde, kann der [[Property_editor/de|Eigenschafteneditor]] verwendet werden, um seine Eigenschaften anzupassen. Nach Änderung einer Eigenschaft, muss der Aufgabenbereich FEM-Netz durch Gmsh erneut geöffnet und die Schaltfläche {{Button|Anwenden}} gedrückt werden |
Nachdem das Netz generiert wurde, kann der [[Property_editor/de|Eigenschafteneditor]] verwendet werden, um seine Eigenschaften anzupassen. Nach Änderung einer Eigenschaft, muss der Aufgabenbereich FEM-Netz durch Gmsh erneut geöffnet und die Schaltfläche {{Button|Anwenden}} gedrückt werden (der Aufgabenbereich kann geöffnet bleiben, solange weitere Eigenschaften geändert werden). |
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Es können so viele unterschiedliche Netzbereiche wie nötig erstellt werden. |
Es können so viele unterschiedliche Netzbereiche wie nötig erstellt werden. |
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==Visual examples== |
==Visual examples== |
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[[File:FEMMeshRegion_Example1.png|300px|]] |
[[File:FEMMeshRegion_Example1.png|300px|]] |
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{{Caption|Beispiel 1: Das grobe Start- |
{{Caption|Beispiel 1: Das grobe Start-NetzGmshAusForm}} |
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[[File:FEMMeshRegion_Example2.png|300px]] |
[[File:FEMMeshRegion_Example2.png|300px]] |
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{{Caption|Example 2: After applying a Mesh refinement using two |
{{Caption|Example 2: After applying a Mesh refinement using two FEM Mesh Region objects, the large hole is refined to a maximum element size of 3 mm, the smaller hole is refined to 1 mm}} |
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[[File:FEMMeshRegion_Example3.png|300px]] |
[[File:FEMMeshRegion_Example3.png|300px]] |
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{{Caption|Beispiel 3: Ein einfaches Beispiel des entstehenden Modellbaums}} |
{{Caption|Beispiel 3: Ein einfaches Beispiel des entstehenden Modellbaums}} |
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<span id="Notes"></span> |
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==Hinweise== |
==Hinweise== |
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The order in which the regions are shown in [[Tree view|Tree view]] |
The order in which the regions are shown in [[Tree view|Tree view]] can change the mesh result. See this [https://forum.freecadweb.org/viewtopic.php?f=18&t=41955 forum thread]. |
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==Related== |
==Related== |
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* "Mesh Regions for a Better Analysis" - Video Tutorial by Joko Engineering ([https://www.youtube.com/watch?v=X5RVe2SDPvw link]) |
* "Mesh Regions for a Better Analysis" - Video Tutorial by Joko Engineering ([https://www.youtube.com/watch?v=X5RVe2SDPvw link]) |
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{{Docnav |
{{Docnav/de |
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|[[FEM_MeshBoundaryLayer|FEM |
|[[FEM_MeshBoundaryLayer/de|FEM NetzGrenzschicht]] |
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|[[FEM_MeshGroup|FEM mesh group]] |
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|[[ |
|[[FEM_MeshGroup/de|FEM NetzGruppe]] |
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|IconL=FEM_MeshBoundaryLayer.svg |
|IconL=FEM_MeshBoundaryLayer.svg |
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|IconR=FEM_MeshGroup.svg |
|IconR=FEM_MeshGroup.svg |
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{{FEM Tools navi{{#translation:}}}} |
{{FEM Tools navi{{#translation:}}}} |
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{{Userdocnavi{{#translation:}}}} |
{{Userdocnavi{{#translation:}}}} |
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{{clear}} |
Latest revision as of 09:49, 26 March 2024
FEM Netzbereich |
Menüeintrag |
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Netz → FEM mesh refinement |
Arbeitsbereich |
FEM |
Standardtastenkürzel |
Keiner |
Eingeführt in Version |
- |
Siehe auch |
FEM Anleitung |
Beschreibung
Enables the user to set a localized set of meshing parameters by selecting a set of elements (vertex, edge, face) and applying the parameters to it. It is especially useful for refining meshes in areas of interest or areas where the solver will generate a stronger gradient of a variable. For example, it can be used to refine the mesh around stress-risers (sharp edges, holes, notches, ...) in mechanical analysis, or at areas of contraction in a fluid flow.
Refining the mesh has the advantage of enabling accurate simulation where needed, while allowing coarser mesh in the wider domain, thus drastically optimizing the computation time while maintaining meaningful solutions output.
Anwendung
- To enable the function a FEM mesh from shape by Gmsh must be first provided. Select the Mesh object in the Model Tree and either press the FEM mesh refinement button or use the Mesh → FEM mesh refinement menu option.
- Press the Add button and select one or more of either faces, edges or vertices in the 3D view to apply the mesh refinement to. The selected items will appear in the list of geometrical objects. The selection mode can be also set to Solid.
- Enter the maximum element size for the region.
- Click the OK button.
- Close the task.
- Result: You now should see a new
FEMMeshRegion
object under theFEMMeshGMSH
object (see example #3 below) in your active analysis container.
- Result: You now should see a new
- Double-click on the
FEMMeshGMSH
parent object in your Model Tree and press Apply to force a mesh recalculation. - Close the task.
Nachdem das Netz generiert wurde, kann der Eigenschafteneditor verwendet werden, um seine Eigenschaften anzupassen. Nach Änderung einer Eigenschaft, muss der Aufgabenbereich FEM-Netz durch Gmsh erneut geöffnet und die Schaltfläche Anwenden gedrückt werden (der Aufgabenbereich kann geöffnet bleiben, solange weitere Eigenschaften geändert werden).
Es können so viele unterschiedliche Netzbereiche wie nötig erstellt werden.
Visual examples
Beispiel 1: Das grobe Start-NetzGmshAusForm
Example 2: After applying a Mesh refinement using two FEM Mesh Region objects, the large hole is refined to a maximum element size of 3 mm, the smaller hole is refined to 1 mm
Beispiel 3: Ein einfaches Beispiel des entstehenden Modellbaums
Hinweise
The order in which the regions are shown in Tree view can change the mesh result. See this forum thread.
Related
- "Mesh Regions for a Better Analysis" - Video Tutorial by Joko Engineering (link)
- Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor
- Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)
Constraints
- Electromagnetic: Electrostatic potential, Current density, Magnetization
- Geometrical: Plane rotation, Section print, Transform
- Mechanical: Fixed, Displacement, Contact, Tie, Spring, Force, Pressure, Centrif, Self weight
- Thermal: Initial temperature, Heat flux, Temperature, Body heat source
- Overwrite Constants: Constant vacuum permittivity
- Solve: CalculiX Standard, Elmer, Mystran, Z88; Equations: Deformation, Elasticity, Electrostatic, Electricforce, Magnetodynamic, Magnetodynamic 2D, Flow, Flux, Heat; Solver: Solver control, Solver run
- Results: Purge, Show; Postprocessing: Apply changes, Pipeline from result, Warp filter, Scalar clip filter, Function cut filter, Region clip filter, Contours filter, Line clip filter, Stress linearization plot, Data at point clip filter, Filter function plane, Filter function sphere, Filter function cylinder, Filter function box
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
- Erste Schritte
- Installation: Herunterladen, Windows, Linux, Mac, Zusätzlicher Komponenten, Docker, AppImage, Ubuntu Snap
- Grundlagen: Über FreeCAD, Graphische Oberfläche, Mausbedienung, Auswahlmethoden, Objektname, Programmeinstellungen, Arbeitsbereiche, Dokumentstruktur, Objekteigenschaften, Hilf FreeCAD, Spende
- Hilfe: Tutorien, Video Tutorien
- Arbeitsbereiche: Std Base, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework