Difference between revisions of "FEM CalculiX/ru"

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<languages/>
 
<languages/>
=== Preface ===
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== Preface ==
This page collects all information about the [[http://www.calculix.de/ CalculiX]] solver, the most used and best developed solver in the [[FEM Workbench]] (as of FreeCAD 0.17-0.18_pre). Depending on the OS you are working with, most likely you'll need to pre-install CalculiX first. Check out [[FEM_Install|FEM Install]].
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This page collects information on the [http://www.calculix.de/ CalculiX] finite element solver, the default solver in the [[FEM Workbench]] for structural and thermo-mechanical analysis as of FreeCAD 0.17. Depending on the operating system you are working with, you'll need to install CalculiX before running your first simulation. Please see [[FEM Install|FEM Install]].
  
=== Interface ===
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The solver is able to do linear and non-linear calculations, for static, dynamic, and thermal problems. The solver operates on an Abaqus input file ({{incode|.inp}}), which means it can be used with different pre-processors that support this format. The program includes its own graphical preprocessor which, however, is not used by FreeCAD, only the solver itself.
Interaction between the [[FEM Workbench]] and CalculiX is done by text files. The sequence of the FEM Workbench for CalculiX is as follows:
 
  
# creates a CalculiX input file
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CalculiX is designed to run on Unix platforms like Linux and Irix computers but also on MS-Windows. CalculiX was developed by engineers from MTU Aero Engines, Munich, Germany, to assist them in designing machinery such as jet turbines. The software is currently released to the public on the terms of the GPL version 2.
# starts CalculiX application
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# logs the output of CalculiX and
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== Integration with FreeCAD ==
# reads the output files of CalculiX (if they are available)
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Interaction between the [[FEM Workbench]] and CalculiX is done through writing and reading text files. The sequence of operations is as follows:
 +
 
 +
# A CalculiX input file is created with details required to run the simulation
 +
# The CalculiX solver is started with this input file
 +
# The output from the solver is logged
 +
# The output files from the solver are read, if they are available
  
 
The [[FEM SolverControl|FEM Control Solver]] tool manages the whole process. User interaction in the process is possible.
 
The [[FEM SolverControl|FEM Control Solver]] tool manages the whole process. User interaction in the process is possible.
  
==== Preprocessing interface ====
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== Preprocessing interface ==
CalculiX uses abaqus input file format. The input file could be edited before the solver is started. The units used in the CalculiX input file are independet from the units used in FreeCAD. They will be mm and N. (ToDo: check this. What happens with the mesh if inch is used in FreeCAD. Density was introduced. With this we have kg and s and no longer N?! how about this !?!)
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The input file that CalculiX uses can be prepared and edited before the solver is started. The units used in the input file are independent of the units set in FreeCAD; they will always be millimeters (mm) and Newton (N).
  
The FEM Workbench CalculiX interface supports the following objects:
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{{Emphasis|(ToDo: check this. What happens with the mesh if inch is used in FreeCAD? As density was introduced, with this we have kg and s and no longer N?! how about this?!)}}
===== FEM Elements =====
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 +
The CalculiX interface supports the following objects:
 +
 
 +
=== FEM Elements ===
 
* Tet4 and Tet10
 
* Tet4 and Tet10
 
* S3 and S6  
 
* S3 and S6  
 
* B31 and B32
 
* B31 and B32
* and a few more ... [[FEM Mesh CalculiX]]
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* and those described in [[FEM Mesh CalculiX]]
  
===== Analysis =====
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=== Analysis ===
* linear static analysis
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* Linear static analysis
 
* Frequency analysis
 
* Frequency analysis
* Coupled thermal structural analysis
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* Coupled thermal-structural analysis
 
 
===== Materials =====
 
* one linear elastic isotropic (uniformity in all directions) material
 
* multiple material is in development
 
  
==== Postprocessing interface ====
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=== Materials ===
read resulting stress (Von Mises) and all displacement
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* One linear elastic isotropic material (uniformity in all directions)
 +
* Multiple material use is in development
  
 +
== Postprocessing interface ==
 +
The FEM Workbench can read the resulting stress (Von Mises) and all displacements
  
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<div class="mw-translate-fuzzy">
 
[[Category:Poweruser_Documentation/ru]]
 
[[Category:Poweruser_Documentation/ru]]
 
[[Category:Developer/ru]]
 
[[Category:Developer/ru]]
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</div>
 
{{clear}}
 
{{clear}}

Revision as of 11:08, 7 April 2019

Other languages:
English • ‎français • ‎italiano • ‎polski • ‎română • ‎русский

Preface

This page collects information on the CalculiX finite element solver, the default solver in the FEM Workbench for structural and thermo-mechanical analysis as of FreeCAD 0.17. Depending on the operating system you are working with, you'll need to install CalculiX before running your first simulation. Please see FEM Install.

The solver is able to do linear and non-linear calculations, for static, dynamic, and thermal problems. The solver operates on an Abaqus input file (.inp), which means it can be used with different pre-processors that support this format. The program includes its own graphical preprocessor which, however, is not used by FreeCAD, only the solver itself.

CalculiX is designed to run on Unix platforms like Linux and Irix computers but also on MS-Windows. CalculiX was developed by engineers from MTU Aero Engines, Munich, Germany, to assist them in designing machinery such as jet turbines. The software is currently released to the public on the terms of the GPL version 2.

Integration with FreeCAD

Interaction between the FEM Workbench and CalculiX is done through writing and reading text files. The sequence of operations is as follows:

  1. A CalculiX input file is created with details required to run the simulation
  2. The CalculiX solver is started with this input file
  3. The output from the solver is logged
  4. The output files from the solver are read, if they are available

The FEM Control Solver tool manages the whole process. User interaction in the process is possible.

Preprocessing interface

The input file that CalculiX uses can be prepared and edited before the solver is started. The units used in the input file are independent of the units set in FreeCAD; they will always be millimeters (mm) and Newton (N).

(ToDo: check this. What happens with the mesh if inch is used in FreeCAD? As density was introduced, with this we have kg and s and no longer N?! how about this?!)

The CalculiX interface supports the following objects:

FEM Elements

Analysis

  • Linear static analysis
  • Frequency analysis
  • Coupled thermal-structural analysis

Materials

  • One linear elastic isotropic material (uniformity in all directions)
  • Multiple material use is in development

Postprocessing interface

The FEM Workbench can read the resulting stress (Von Mises) and all displacements