FEM SolverElmer/ru
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FEM SolverElmer |
Системное название |
---|
FEM SolverElmer |
Расположение в меню |
Solve → solver Elmer |
Верстаки |
FEM |
Быстрые клавиши |
Нет |
Представлено в версии |
- |
См. также |
FEM Solver CalculiX, FEM Solver Z88, Учебник МКЭ |
Описание
Elmer - это программное обеспечение для мультифизического моделирования с открытым исходным кодом, которое в основном разрабатывается CSC - IT Center for Science (CSC). Разработка Elmer началась в 1995 году в сотрудничестве с финскими университетами, исследовательскими институтами и промышленностью. После публикации с открытым исходным кодом в 2005 году использование и развитие Elmer стало международным.
Элмер включает, в частности, физические модели гидродинамики, строительной механики, электромагнетизма, теплопередачи и акустики. Они описываются уравнениями в частных производных, которые Элмер решает методом конечных элементов (МКЭ). https://www.csc.fi/web/elmer
Создание объекта SolverElmer в контейнере анализа в FreeCAD дает доступ к уравнениям Elmer для простого или мультифизического анализа.
Since FreeCAD already has an extensive integration of Calculix and Z88 as solvers for mechanical and thermo-mechanical analysis, Elmer will be preferred for Computational Fluid Dynamics (CFD), Heat, Electrostatics, Magnetostatics and Electrical Forces. It can also be used for mechanical FEA through the Elasticity equation or any combination of the aforementioned equations.
Yстановка
Elmer requires two components to be interfaced with FreeCAD:
- ElmerGrid is the interface handling meshes
- ElmerSolver is handling the computation.
There are standalone programs for both of these applications but their installation and usage are beyond the scope of the FreeCAD integration.
- Go to the CSC binaries resources for Elmer: https://www.nic.funet.fi/pub/sci/physics/elmer/bin/ OR https://www.csc.fi/web/elmer/binaries
- Download and install the version best suited to your Operating System (Windows 64 bits or Linux)
- In FreeCAD go to Edit → Preferences → FEM → Elmer
- Link the correct path for both
ElmerGrid
andElmerSolver
You are ready to use Elmer in FreeCAD.
Использование
- Switch to the FEM Workbench
- Create an Analysis container by pressing the icon.
- Create a FEM Solver for Elmer, by pressing the icon.
- Note: A successful analysis will require at least a Model (2D or 3D), a Material (Fluid or Solid), a Mesh, Equations and Boundary conditions
Above: Example of a tree view once a Solver for Elmer is activated
- Edit the parameters for the solver in the Property editor Data tab of the SolverElmer object in the model tree view
- Double-click on the SolverElmer object to prepare an analysis run
- Select the path to write the analysis in by clicking ...
- Click Write to write the case files in the directory selected previously
- Click Run to start the analysis
About Equations
- Each type of analysis in Elmer is called an Equation (Flow, Heat, Electrostatics...)
- One or several equations can be used at once with Elmer by simply adding the Equation object under the SolverElmer object:
- Click on the SolverElmer object in the model tree view
- Select an equation:
Notes
- Parameters for the Solver and for the Equations are independently set through the Property editor Data tab of their respective objects in the tree view.
- Each equation will have a priority, for example, if trying see the effect of a convective flow of hot air, the equation for Flow should be solved with higher priority than Heat, otherwise the solver will first solve Heat through conduction and then Flow.
Документация
The following link gives access to the full documentation for Elmer https://www.nic.funet.fi/pub/sci/physics/elmer/doc/ This includes the manuals as well as tutorials. Note that documentation and files appended with "gui" generally concern the usage of the Elmer GUI and not the FreeCAD implementation of Elmer.
- 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