Use subseq with defined subcase ids
Hi all
In the case below, i would like to combine subcase 90 and subcase 100 in a subcom.
I wrote like in the below however nastran does not understand. Could you please help me how to combine the loadcase with their ids.
1.5 * subcase 90 + 1.0* subcase 100
Regards
SUBCASE 90
LABEL= fx1000
SPC = 1
LOAD = 8
ANALYSIS = STATICS
DISPLACEMENT = ALL
STRESS = ALL
.............
.............
.............
.............
SUBCASE 100
LABEL= fx2000
SPC = 1
LOAD = 15
ANALYSIS = STATICS
DISPLACEMENT = ALL
STRESS = ALL
$
$Combine loadcases with defined id
SUBCOM 500
LABEL= loadstep1
SUBSEQ = 1.5,90,1.0,100
DISPLACEMENT = ALL
STRESS = ALL
Answers
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I can't speak for Nastran, you would need to ask in their support forum
in optistruct the SUBSEQ syntax doesn't allow for a specific case by ID, description here
https://2022.help.altair.com/2022/hwsolvers/os/topics/solvers/os/subseq_sub_r.htm#subseq_sub_r
you would need to count back to include the correct cases as R1, Rn
e.g. if in your case you had static cases 90, 91, 92, 93, 94, 95, 100
it would be
SUBSEQ=1.5, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0
i.e. a 0.0 for each intervening case
0
Altair Employee