Contact/glue analysis 1

[ilotam]

I'm getting such message when I try to run big model (70k elements)
with 16 glue connections.


USER INFORMATION MESSAGE - SINGULARITIES FOUND USING EIGENVALUE METHOD
*** 16 SINGULARITIES FOUND 16 SINGULARITIES ELIMINATED
*** USER FATAL MESSAGE 4690 (FOCOEL)
INSUFFICENT MEMORY ALLOCATED FOR THE CONTACT/GLUE ANALYSIS
USER ACTION: INCREASE MEMORY REQUEST AND RERUN.

How to increase memory request?

Please help!!!

 

[ilotam]

I have 8GB RAM, 12GB paging file, and here is the nas8.rcf file configuration:


Memory=ESTIMATE
Buffsize=8193
ishellpath=%NXN_BASE%\bin
scr=yes
msgbell=no
Auth=@LocalHost
program=FEMAP
$Sdir=$TEMP
fpe=no
sysfield=mapio=no,rawio=yes

 

[BlasMolero]

Hello!,
In fact, I have noted that new NX NASTRAN 8.0 (shipped with new FEMAP V10.3) request additional memory to allocate for contact/glue analysis, the same model ran OK with old NX NASTRAN 7.1 (on FEMAP 10.2). I suppose the next version if FEMAP 10.3.1 due for February 2012 (that will ship the new already exsiting version of NX NXASTRAN 8.1) will fix this problem.

The solution is simply: in the window "NASTRAN Executive and Solution Options" enter the value of say 1024 in the field "Solver Memory (MB 0=auto)" and you are done!. If the error persist, simply increase the value to say 2048, not more.

Best regards,
Blas.

~~~~~~~~~~~~~~~~~~~~~~
Blas Molero Hidalgo
Ingeniero Industrial
Director

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