FEM MeshRegion/ru: Difference between revisions
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==Описание== |
==Описание== |
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FEM MeshRegion 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. |
FEM MeshRegion 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 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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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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[[File:FEMMeshRegion_Example1.png|300px|]] |
[[File:FEMMeshRegion_Example1.png|300px|]] |
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{{Caption|Example 1: The initial coarse |
{{Caption|Example 1: The initial coarse FEM Mesh by GMSH}} |
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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, 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]] |
Revision as of 17:16, 21 October 2022
Область сетки МКЭ |
Системное название |
---|
FEM MeshRegion |
Расположение в меню |
Mesh → Область сетки МКЭ |
Верстаки |
FEM |
Быстрые клавиши |
Нет |
Представлено в версии |
- |
См. также |
FEM tutorial |
Описание
FEM MeshRegion 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 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.
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.
Применение
- To enable the function a mesh must be first provided FEM mesh from shape by Gmsh.
- Edit the maximal 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.
After the mesh has been crated you can change its properties using the property editor. After you changed a property, you must reopen the Gmsh dialog again and click the Apply button. (You can leave the dialog open while changing properties.)
You can create as many different mesh regions as needed.
Visual examples
Example 1: The initial coarse FEM Mesh by GMSH
Example 2: After applying a Mesh refinement using two FEM Mesh Region, the large hole is refined to a maximum element size of 3 mm, the smaller hole is refined to 1 mm
Example 3: A simple example of the resulting Model Tree
Примечания
Порядок, в котором области отображаются в Древе проекта, может изменить результат сетки. См. Эту ветку форума.
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
- Начинающим
- Установка: Загрузка, Windows, Linux, Mac, Дополнительных компонентов, Docker, AppImage, Ubuntu Snap
- Базовая: О FreeCAD, Интерфейс, Навигация мыши, Методы выделения, Имя объекта, Настройки, Верстаки, Структура документа, Свойства, Помоги FreeCAD, Пожертвования
- Помощь: Учебники, Видео учебники
- Верстаки: Std Base, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework