FEM SolverCalculixCxxtools

FEM mesh to mesh

Solver CalculiX

FEM

FEM Solver
Системное название
FEM SolverCalculixCxxtools
Расположение в меню
Solve → Solver CalculiX Standard
Верстаки
FEM
Быстрые клавиши
S X
Представлено в версии
-
См. также
FEM tutorial

Описание

CalculiXccxTools enables usage of the CalculiX solver. It may be used for:

1. Setting analysis parameters
2. Selecting working directory
3. Running the CalculiX solver

Использование

1. FEM SolverCalculixCxxtools object is created automatically with creation of an Analysis container. Or use the following alternatives:
   • Use Solve → Solver CalculiX Standard
   • Press S then X shortcut keys

1. Optionally set data properties of the CalculiXccxTools object
2. Double click on the CalculiXccxTools object
3. Select type of the analysis
4. Click Write .inp file
5. Click Run CalculiX

Опции

By using Edit .inp file you can display and edit CalculiX input file manually before running analysis. In this case it might be useful to use parameter "Split Input Writer = true".

Свойства

Default values can be set in the menu Edit → Preferences → FEM → CalculiX

• ДанныеAnalysis Type:
  • static
  • frequency
  • thermomech - for mechanical and thermal loads
  • check - to check only the mesh introduced in version 0.19

• ДанныеBeam Shell Result Output 3D: note that CalculiX internally expands 1D and 2D elements into 3D elements to accomplish FE analysis
  • false - results of 1D and 2D elements will be averaged to the nodes of original 1D or 2D mesh (i.e. purely bended beam will show 0 nodal stresses due to averaging)
  • true - resulting mesh will contain 1D and 2D elements expanded to 3D elements

• ДанныеEigenmode High Limit: Eigenvalues above this limit will not be calculated; Note: if eigenvalues of the model are above the high limit, CalculiX will finish without output

• ДанныеEigenmode Low Limit: Eigenvalues below this limit will not be calculated

• ДанныеEigenmodes Count: number of lowest eigenmodes to be calculated

• ДанныеGeometric Nonlinearity:
  • linear - linear analysis will be performed if model does not contain nonlinear material
  • nonlinear - nonlinear analysis will be performed

• ДанныеIterations Control parameter Cutb: defines the second line of CalculiX' advanced iteration parameters. Used if ДанныеIterations Control Parameter Time Use is set to true.

• ДанныеIterations Control Parameter Iter: defines the first line of CalculiX' advanced iteration parameters. Used if ДанныеIterations Control Parameter Time Use is set to true.

• ДанныеIterations Control Parameter Time Use
  • true - activates ДанныеIterations Control parameter Cutb and ДанныеIterations Control Parameter Iter
  • false

• ДанныеIterations Thermo Mech Maximum: maximum number of increments in thermomechanical analysis after which the job will be stopped.

• ДанныеIterations User Defined Incrementations:
  • true - automatic incrementation control will be switched off by DIRECT parameter
  • false - incrementation control will be automatic

• ДанныеIterations User Defined Time Step Length:
  • true - activates ДанныеTime End and ДанныеTime Initial Step parameters
  • false

• ДанныеMaterial Nonlinearity:
  • linear - only linear material properties will be included in the analysis
  • nonlinear - nonlinear material properties will be used from Nonlinear mechanical material object

• ДанныеMatrix Solver Type: type of the solver to solve equation system inside FE analysis. It may significantly affect calculation speed and memory demands. Suitability depends on your FE model and available hardware
  • default - automatically selects matrix solver depending on available solvers (probably it will be Spooles)
  • spooles - direct solver with support of multiple CPUs. Number of CPUs need to be set in Edit → Preferences → FEM → CalculiX → Solver defaults → Number of CPU's to use.
  • iterativescaling - iterative solver with least memory demands, suitable if model contains mostly 3D elements
  • iterativecholesky - iterative solver with preconditioning with and with low memory demands, suitable if model contains mostly 3D elements

• ДанныеSplit Input Writer:
  • false - write whole input into one *.inp file to be used by CalculiX solver
  • true - split solver inputs into more *.inp files, that can clarify hand editing

• ДанныеThermo Mechanical Steady State:
  • true - steady state thermo mechanical analysis
  • false - transient thermo mechanical analysis

• ДанныеTime End: time period of the step, used when parameter ДанныеIterations User Defined Incrementations or ДанныеIterations User Defined Time Step Length is true

• ДанныеTime Initial Step: initial time increment of the step, used when parameter ДанныеIterations User Defined Incrementations or ДанныеIterations User Defined Time Step Length is true

• ДанныеWorking Dir: path to the working directory which will be used for CalculiX analysis files.

Ограничения

When running a CalculiX, you might end up with error 4294977295. This means you don't have enough RAM space. You have then 2 options:

1. reduce the number of mesh nodes, preferably by omitting geometry that is not absolutely necessary for your analysis
2. buy more RAM for your PC

Примечания

Original CalculiX documentation can be found at http://dhondt.de/ in the "ccx" paragraph.

Scripting

FEM mesh to mesh

Solver CalculiX

FEM

FEM

• FEM Analysis

• Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor

• Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)

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Constraints

• Electromagnetic: Electrostatic potential, Current density, Magnetization

• Fluid: Initial flow velocity, Initial pressure, Flow velocity

• 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

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• Mesh: Mesh Netgen, Mesh GMSH, Mesh boundary layer, Mesh region, Mesh group, Nodes set, Mesh to mesh

• 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

• Utilities: Clipping plane, Remove clipping planes, Open FEM examples; Mesh clear, Mesh display info

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• Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types

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