# FEM SolverCalculixCxxtools

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Назад: FEM mesh to mesh
Далее: Solver CalculiX

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 . 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:
• 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 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 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
• 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