I entcounter a problem regarding a eigenfrequency simulation with calculix in FC.
I have the following model and can run a static simulation but when switching to frequency-analysis I see the following error messages:
Code: Select all
Active analysis found: Analysis
Active analysis found: Analysis
We gone start GMSH FEM mesh run!
Part to mesh: Name --> Extrude, Label --> Extrude, ShapeType --> Solid
CharacteristicLengthMax: 1e+22
CharacteristicLengthMin: 0.0
ElementOrder: 2
ElementDimension: 3
/tmp/Extrude_Geometry.brep
/tmp/Extrude_Mesh_TmpGmsh.unv
/tmp/shape2mesh.geo
gmsh
No mesh group objects.
Group meshing.
{}
No mesh regions.
{}
{}
Start: ViewProviderFEMMeshBuilder::createMesh() =================================
0.001000: Start build up 13940 face helper
0.029000: Start eliminate internal faces SIMPLE
1.199000: Start build up node map
1.210000: Start set point vector
1.213000: Start count triangle size
NumTriangles:10776
1.213000: Start build up triangle vector
1.273000: Start build up edge vector
NumEdges:16164
1.281000: Finish =========================================================
The Part should have a pretty new FEM mesh!
ThermalConductivity not found in material data of: None
ThermalExpansionCoefficient not found in material data of: None
SpecificHeat not found in material data of: None
FEM preferences working dir is not set, the solver working directory is used.
Dir '' doesn't exist and cannot be created.
Dir '/tmp' will be used instead.
FemTools.setup_working_dir() --> self.working_dir = /tmp
FemInputWriterCcx --> self.dir_name --> /tmp
FemInputWriterCcx --> self.main_file_name --> Extrude_Mesh.inp
FemInputWriterCcx --> self.file_name --> /tmp/Extrude_Mesh.inp
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face1')
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face2')
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face3')
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face4')
Writing time input file: 0.327914
Invalid Signal signature: textchanged()
FEM preferences working dir is not set, the solver working directory is used.
Dir '' doesn't exist and cannot be created.
Dir '/tmp' will be used instead.
FemTools.setup_working_dir() --> self.working_dir = /tmp
FemInputWriterCcx --> self.dir_name --> /tmp
FemInputWriterCcx --> self.main_file_name --> Extrude_Mesh.inp
FemInputWriterCcx --> self.file_name --> /tmp/Extrude_Mesh.inp
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face1')
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face2')
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face3')
(' ReferenceShape : ', 'Face', ', ', 'Extrude', ', ', u'Extrude', ' --> ', 'Face4')
Writing time input file: 0.452673
Analysis failed with exit code 201
--------start of stderr-------
--------end of stderr---------
--------start of stdout-------
************************************************************
CalculiX Version 2.9, Copyright(C) 1998-2015 Guido Dhondt
CalculiX comes with ABSOLUTELY NO WARRANTY. This is free
software, and you are welcome to redistribute it under
certain conditions, see gpl.htm
************************************************************
You are using an executable made on Thu Jan 21 05:18:00 UTC 2016
The numbers below are estimated upper bounds
number of:
nodes: 7532
elements: 6543
one-dimensional elements: 0
two-dimensional elements: 0
integration points per element: 4
degrees of freedom per node: 3
layers per element: 1
distributed facial loads: 0
distributed volumetric loads: 0
concentrated loads: 0
single point constraints: 3264
multiple point constraints: 1
terms in all multiple point constraints: 1
tie constraints: 0
dependent nodes tied by cyclic constraints: 0
dependent nodes in pre-tension constraints: 0
sets: 4
terms in all sets: 23122
materials: 1
constants per material and temperature: 2
temperature points per material: 1
plastic data points per material: 0
orientations: 0
amplitudes: 1
data points in all amplitudes: 1
print requests: 2
transformations: 0
property cards: 0
STEP 1
Frequency analysis was selected
Decascading the MPC's
Determining the structure of the matrix:
number of equations
19332
number of nonzero lower triangular matrix elements
603945
Using up to 4 cpu(s) for the stress calculation.
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6195
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6195
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6195
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6196
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6196
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6196
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6205
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6205
*ERROR in e_c3d: nonpositive jacobian
determinant in element 6205
--------end of stdout---------
CalculiX failed ccx finished with error 201
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _FemSolverCalculix
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _FemMeshGmsh
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _FemMaterial
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _FemMechanicalResult
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _FemMechanicalResult
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _FemMechanicalResult
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _ViewProviderFemSolverCalculix
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _ViewProviderFemMaterial
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _ViewProviderFemMeshGmsh
Start: ViewProviderFEMMeshBuilder::createMesh() =================================
0.000000: Start build up 2016 face helper
0.004000: Start eliminate internal faces SIMPLE
0.019000: Start build up node map
0.020000: Start set point vector
0.021000: Start count triangle size
NumTriangles:1760
0.021000: Start build up triangle vector
0.026000: Start build up edge vector
NumEdges:2640
0.026000: Finish =========================================================
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _ViewProviderFemMechanicalResult
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _ViewProviderFemMechanicalResult
<unknown exception traceback><type 'exceptions.ImportError'>: No module named _ViewProviderFemMechanicalResult
Start: ViewProviderFEMMeshBuilder::createMesh() =================================
0.000000: Start build up 2016 face helper
0.004000: Start eliminate internal faces SIMPLE
0.019000: Start build up node map
0.020000: Start set point vector
0.021000: Start count triangle size
NumTriangles:1760
0.021000: Start build up triangle vector
0.026000: Start build up edge vector
NumEdges:2640
0.026000: Finish =========================================================
OS: Ubuntu 16.04.2 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.10412 (Git)
Build type: Unknown
Branch: femdev
Hash: 9229026ea3348cfa6eec93d1e7086359b5f6a508
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 6.8.0.oce-0.17
also tried/rebuilt it on and a two days old master version, did rebuild it several times because FC-material did change a lot:
OS: Ubuntu 16.04.2 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.10168 (Git)
Build type: None
Branch: master
Hash: 6630bcf9fa8e849fe846d1c2b780148a7a2c1e4b
Python version: 2.7.12
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 6.8.0.oce-0.17
Here the simpler but working model: I do not know why it is working with the simpler geometry and appreciate any hints and help.
Thanks in advance,
HoWil