Настройки FEM
Экран настроек верстака FEM находится в общем окне настроек Правка → Настройки → Fem
Есть пять вкладок, одна для общей конфигурации рабочего места.
The current supported external solvers are:
Общее
On the General tab you can specify the following:
Gmsh
On the Gmsh tab you can specify the following:
Name | Description |
---|---|
Search in known binary directories | If checked, FreeCAD will look for the binary of Gmsh in known (usual) directories |
Gmsh binary path | The path to the the binary of Gmsh |
CalculiX
On the CalculiX tab you can specify the following:
Elmer
On the Elmer tab you can specify the following:
Name | Description |
---|---|
ElmerGrid: Search in known binary directories | If checked, FreeCAD will look for the binary of the grid writer utility of the Elmer in known (usual) directories |
ElmerGrid binary path | The path to the the binary of the grid writer utility of the Elmer |
ElmerSolver: Search in known binary directories | If checked, FreeCAD will look for the solver binary of Elmer in known (usual) directories |
ElmerSolver binary path | The path to the the solver binary of Elmer |
CPU cores to be used | The number of CPU cores that will be used to perform the solving.
Important: Elmer will divide the mesh into the same number of portions. This can result in side-effects:
So it is often necessary to adjust the number of cores, depending on the mesh. Known limitation: For some simulation types you first need to install Elmer modules to enable multi-threading. Check the Elmer report for info about this. A typical case is that for direct solving one has to install the MUMPS module. |
Filter results | The mesh volume regions processed by each CPU core will be merged to make the volume boundaries invisible. |
Mystran
On the Mystran tab you can specify the following:
Name | Description |
---|---|
Search in known binary directories | If checked, FreeCAD will look for the binary of the Mystran in known (usual) directories |
Mystran binary path | The path to the the binary of the Mystran |
Z88
On the Z88 tab you can specify the following:
Name | Description |
---|---|
Search in known binary directories | If checked, FreeCAD will look for the binary named z88r of the Z88 solver in known (usual) directories |
z88r binary path | The path to the the binary named z88r of the Z88 solver |
Solver method | The solver method used by the Z88 solver for new simulations. |
Max places in stiffness matrix | This is relevant when the solver method Simple Cholesky is used. After starting the solver, it might tell you that you need to increase the MAXGS value. In this case increase the max places and re-run the solver. |
Max places in coincidence vector | This is relevant when one of the iterative solver methods is used. After starting the solver, it might tell you that you need to increase the MAXKOI value. In this case increase the max places and re-run the solver. |
Material
On the Material tab you can specify the following:
Name | Description |
---|---|
Use built-in materials | The cards built-in to FreeCAD will be listed as available. |
Use materials from Materials directory in user's FreeCAD preference directory | The cards from FreeCAD's preferences directory will be listed as available. On Windows, that would for example be this folder:
C:\Users\<username>\AppData\Roaming\FreeCAD\Material |
Use materials from user defined directory | Also material cards also from the specified directory will be listed as available. |
Delete card duplicates | Duplicate cards will be deleted from the displayed material card list. |
Sort by resources | Material cards will appear sorted by their resources (locations). If unchecked, they will be sorted by their name. |
- 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