CalculiX .inp file *ORIENTATION errors in OpenVSP output

[Peter Schwenn]

Structuralists,

I am transitioning from OpenVSP 2 and SAM.  Main current problem: ORIENTATION statements in simple Wing CalculiX .inp files (prior to adding the Vspaero loads).  Specifics in Bold below.

These "ORIENTATION" errors are listed in the Command Prompt window (upon submitting the .inp file (excerpted below) to Calculix:
_______________________________________________________________________________________
on a Windows 8 machine, nodename LENOVOLAPTOP, release 6, version 6.2  9200, machine 8664
parameters:3 arguments:2
GL_MAX_EVAL_ORDER:8
 Try to read ccx input

******************************************************************************
*  read ccx input                                   4.4.2002 wi              *
*                                                                            *
*                                                                            *
* -only free-format is supported. fixed format might cause a prg-crash.      *
*                                                                            *
*                                                                            *
******************************************************************************
 ignore statement: *NODEFILE
 ignore statement: *NODEPRINT

 8740 nodes reallocated

 17564 elements reallocated
WARNING: option:ORIENTATION=OSkin_WingGeom_Struct0_0 not supported, keyword ignored
WARNING: *ORIENTATION not known. Data ignored.
WARNING: option:ORIENTATION=OSkin_WingGeom_Struct0_1 not supported, keyword ignored
WARNING: *ORIENTATION not known. Data ignored.
WARNING: *ELFILE not known. Data ignored.
WARNING: *ENDSTEP not known. Data ignored.
 generate node-values for set:+dlo_ds0
 fill dataset:0 name= +dlo
 ncomps:2
 Elements: 17564 Nodes:8740 Datasets:1  MinElemNr: 9002 MaxElemNr: 26565 MinNodNr:1 MaxNodNr:8740  read in 0.184000 sec
 found elements of type 1: 0
 found elements of type 2: 0
 found elements of type 3: 0
 found elements of type 4: 0
 found elements of type 5: 0
 found elements of type 6: 0
 found elements of type 7: 17564
 found elements of type 8: 0
 found elements of type 9: 0
 found elements of type 10: 0
 found elements of type 11: 0
 found elements of type 12: 0
 ERROR in set:+dlo, face:2 of element:9002 does not exist.
 ERROR in set:+dlo, face:2 of element:9003 does not exist.
 ERROR in set:+dlo, face:2 of element:9004 does not exist.
 ERROR in set:+dlo, face:2 of element:9005 does not exist.
 
_______________________________________________________________________

** Calculix structure data file generated from OpenVSP 3.43.0
** WingGeom_Struct0
** Num_Nodes:       8740
** Num_Els:         17564
** Num_Tris:        17564
** Num_Quads:       0
** Num_Beams:       0
** Node_Offset:     0
** Element_Offset:  9000

** Skin WingGeom_Struct0
*NODE, NSET=NSkin_WingGeom_Struct0
1,0.272982,0.000000,-0.000000
2,0.267240,0.000000,-0.133735
3,0.393504,0.000000,-0.000000
4,0.183007,0.000000,-0.000000
5,0.176764,0.000000,-0.112480
6,0.389627,0.000000,-0.154618
7,0.555346,0.000000,-0.000000
...
...
...
26562,6811,6813,8734
26563,8735,8634,6811
26564,8740,8642,8634
26565,8733,7060,8739

** Properties WingGeom_Struct0

*SHELL SECTION, ELSET=ESkin_WingGeom_Struct0_0, MATERIAL=Aluminum_7075-T6, ORIENTATION=OSkin_WingGeom_Struct0_0
0.00275

*ORIENTATION, NAME=OSkin_WingGeom_Struct0_0, SYSTEM=RECTANGULAR
0.311479,0.950253,-0.000000,0.0,0.0,1.0

*SHELL SECTION, ELSET=ESkin_WingGeom_Struct0_1, MATERIAL=Aluminum_7075-T6, ORIENTATION=OSkin_WingGeom_Struct0_1
0.00275

*ORIENTATION, NAME=OSkin_WingGeom_Struct0_1, SYSTEM=RECTANGULAR
0.311479,-0.950253,-0.000000,0.0,0.0,1.0

** Materials
*MATERIAL, NAME=Aluminum_7075-T6
*DENSITY
5.4245
*ELASTIC, TYPE=ISO
1.4832e+09, 0.33
*EXPANSION, TYPE=ISO
1.28e-05

[eof]

_________________________________________________________________________________

[Environment: OpenVSP 3.43 on Win 11.  CalculiX Version 2.10 from download of CalculiX-GE-OSS-2.10-win-x64.zip from Cesare Guardino's GE site.  Same results with OpenVSP 3.3x,3.40 and earlier CalculiX's; and on Win 10 on another machine.]

[Goal: Structural analyses of varying wing skin thicknesses and rib/spar layouts for light-sport size traditional config aircraft.]

Thanks,

Peter Schwenn

[Rob McDonald]

Just a guess -- someone with more experience with CalculiX will probably have to jump in.

I think there are some bugs in CalculiX around long names.  Between the structure name, geom name, and part name, OpenVSP builds up a pretty long name.

You might try shortening all the names and see if that helps at all.

Rob

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[Peter Schwenn]

Rob,

I'll give that a try.

Thanks,

Peter S

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[Peter Schwenn]

I shortened all the names the user can change and so the built-up names in the CalculiX .inp are all much shorter.  No change, so that's not it (in this case).  I looked in the Calculix doc for *ORIENTATION  parameter's definition and use but the examples I found were not helpful.

I will look for the cause elsewhere.

thanks,

Peter Schwenn.

[James J]

Hi Peter,

The output you pasted is for CGX, the graphical interface for Calculix. It ignores most things besides *ELEMENT, *NODE, *DLOAD, *CLOAD, and some others I presume. If you run CCX, the solver, you will not get those errors. 

If you are looking for a way to visualize the orientations, I suggest using VSPViewer. PreProMax is also a good visualization software for Calculix models, however it doesn't explicitly support *ORIENTATION (you can add it as a custom keyword though).

Best,

James