NX Nastran topology optimization with SOL101

[Fite]

Hallo all,

for the input file below I'll get the following error messages.
I'd like to minimize mass (MASS) while the compliance(COMP) stays above 80% of the starting compliance.

*** USER FATAL MESSAGE 5006 (APPEND)
INPUT FILES HAVE DIFFERENT RECORD TYPES
*** SYSTEM FATAL MESSAGE 3007 (APPEND)
ILLEGAL INPUT TO SUBROUTINE APPEND
0FATAL ERROR

Has anyone an idea, how to deal with it?

Kind regards
Fite



SOL 101
CEND
METHOD=1
SET 1 = 5,35
ESE(PLOT,AVERAGE,THRES=0.0) = ALL
DISPLACEMENT = ALL
GPFORCE = 1
LOAD = 1
BEGIN BULK
FORCE,1,5,,1.0E5,0.0,0.0,-1.0
PARAM,POST,-2
PARAM,GRDPNT,0
PARAM,ITOPOPT,2
PARAM,ITOMXITR,20
PARAM,ITODENS,2.588e-4
GRID,1,,0.,0.,0.,,123456
GRID,2,,1.,0.,0.
GRID,3,,2.,0.,0.
GRID,4,,3.,0.,0.
GRID,5,,4.,0.,0.
GRID,11,,0.,1.,0.,,123456
GRID,12,,1.,1.,0.
GRID,13,,2.,1.,0.
GRID,14,,3.,1.,0.
GRID,15,,4.,1.,0.
GRID,21,,0.,2.,0.,,123456
GRID,22,,1.,2.,0.
GRID,23,,2.,2.,0.
GRID,24,,3.,2.,0.
GRID,25,,4.,2.,0.
GRID,31,,0.,3.,0.,,123456
GRID,32,,1.,3.,0.
GRID,33,,2.,3.,0.
GRID,34,,3.,3.,0.
GRID,35,,4.,3.,0.
MAT1 1001 11.538+6.3 2.588-4 1.E-6 0.
PSHELL 101 1001 1.0 1001
CQUAD4,1,101,1,2,12,11
CQUAD4,2,101,2,3,13,12
CQUAD4,3,101,3,4,14,13
CQUAD4,4,101,4,5,15,14
CQUAD4,5,101,11,12,22,21
CQUAD4,6,101,12,13,23,22
CQUAD4,7,101,13,14,24,23
CQUAD4,8,101,14,15,25,24
CQUAD4,15,101,21,22,32,31
CQUAD4,16,101,22,23,33,32
CQUAD4,17,101,23,24,34,33
CQUAD4,18,101,24,25,35,34
$ Design variable matrix
$dmi,efill,0,2,1,2,,3,2
$dmi,efill,1,1,33.,6.,1.00
$dmi,efill,2,1,33.,7.,1.00
$
$ Design variable matrix
dmi,efill,0,2,1,2,,3,2
dmi,efill,1,1,33.,6.,1.00
dmi,efill,2,1,33.,7.,1.00
$ Design objective table
DTI,OBJT,0,2
DTI,OBJT,1,MASS,1,1.0,ENDREC
DTI,OBJT,2,COMP,0,-0.8,ENDREC
enddata

 

[nabilishes]

For optimization, you need to use SOL200

 

[Fite]

Hi,

generally spoken, you are right. But SOL200 does not support topology optimization!!!
That's why your answer is of no benefit at all.

Kind regards