FEM MeshRegion/ru
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| Расположение в меню |
|---|
| Mesh → Область сетки МКЭ |
| Верстаки |
| FEM |
| Быстрые клавиши |
| Нет |
| Представлено в версии |
| - |
| См. также |
| FEM tutorial |
Описание
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.
Применение
- To enable the command a
Mesh From Shape by Gmsh or (1.1 and above)
Mesh From Shape by Netgen must be provided first.
- Select the Mesh object in the Tree View.
- There are several ways to invoke the command:
- Press the
Mesh Refinement button.
- Select the Mesh →
Mesh Refinement option from the menu.
- Press the
- 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. introduced in 1.1: To remove objects from the selection, press the Remove button.
- Enter the maximum element size for the region.
- Click the OK button.
- Close the task.
- Result: You now should see a new
FEMMeshRegionobject under theFEMMeshGmshor (1.1 and above)FEMMeshNetgenobject (see example #3 below) in your active analysis container.
- Result: You now should see a new
- Double-click on the
FEMMeshGmshor (1.1 and above)FEMMeshNetgenparent object in your Model Tree and press Apply to force a mesh recalculation. - Close the task.
After the mesh has been created, you can change its properties using the Property View. After you change a property, you must reopen the mesh 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 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
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 Material, Fluid Material, Non-Linear Mechanical Material, Reinforced Material (Concrete); Material Editor
- Element Geometry: Beam Cross Section, Beam Rotation, Shell Plate Thickness, Fluid Section for 1D Flow
- Electromagnetic Boundary Conditions: Electrostatic Potential Boundary Condition, Current Density Boundary Condition, Magnetization Boundary Condition, Electric Charge Density
- Fluid Boundary Conditions: Initial Flow Velocity Condition, Initial Pressure Condition, Flow Velocity Boundary Condition
- Geometrical Analysis Features: Plane Multi-Point Constraint, Section Print Feature, Local Coordinate System
- Mechanical Boundary Conditions and Loads: Fixed Boundary Condition, Rigid Body Constraint, Displacement Boundary Condition, Contact Constraint, Tie Constraint, Spring Boundary Condition, Force Load, Pressure Load, Centrifugal Load, Gravity Load
- Thermal Boundary Conditions and Loads: Initial Temperature, Heat Flux Load, Temperature Boundary Condition, Body Heat Source
- Overwrite Constants: Constant Vacuum Permittivity
- Mesh: Mesh From Shape by Netgen, Mesh From Shape by Gmsh, Mesh Boundary Layer, Mesh Refinement, Mesh Group, Erase Elements, FEM Mesh to Mesh
- Solve: Solver CalculiX, Solver Elmer, Solver Mystran, Solver Z88; Mechanical Equations: Elasticity Equation, Deformation Equation; Electromagnetic Equations: Electrostatic Equation, Electricforce Equation, Magnetodynamic Equation, Magnetodynamic 2D Equation, Static Current Equation; Flow Equation, Flux Equation, Heat Equation, Solver Job Control, Run Solver
- Results: Purge Results, Show Result, Apply Changes to Pipeline, Post Pipeline From Result, Pipeline Branch, Warp Filter, Scalar Clip Filter, Function Cut Filter, Region Clip Filter, Contours Filter, Glyph Filter, Line Clip Filter, Stress Linearization Plot, Data at Point Clip Filter, Calculator Filter; Filter Functions: Plane, Sphere, Cylinder, Box; Data Visualizations: Create Lineplot, Create Histogram, Create Table
- Utilities: Clipping Plane on Face, Remove All Clipping Planes, FEM Examples; Clear FEM Mesh, Display Mesh Info
- 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
