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How to improve the disk memory ?

Experimenter
Experimenter
Good Morning,
I have some problems to resolve my simulation.
I use the software NX with the solver NX NASTRAN.
I have a big model of simulation.
Furthermore I use the solution type : SEMODES 103-RESPONSE SIMULATION.
As a result, an important data entries take part in my solution.
After lauching the calcul, after a long moment (maybe 6 hours), I have no result due to the lack of disk memory.
So, I tried to resolve this problem putting in the Deck Nastran :


$*$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$*
$* NASTRAN
$*
$*$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$*
INIT MASTER(S)
NASTRAN BUFFSIZE=32769
NASTRAN ITER=NO
$*
$*$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$*
$* FILE MANAGEMENT
$*
$*$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$*
$*
$*$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$*
$* EXECUTIVE CONTROL
$*
$*$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$*
ID,NASTRAN, ...
SOL 103
TIME 999
DIAG 44
CEND
$*
and adding in the .rcf file :

ASSIGN SCR1 ='D: \junk.scr'
ASSIGN SCR_D1 ='D: \junk.scr300'
ASSIGN DB1 ='D: \junk.db1'
INIT SCRATCH LOGI=(SCR1(20GB)) ,
SCR300=(SCR_D1(20GB))
INIT DBALL LOGI=(DB1(20GB))


Unfortunately, I have now another problem :
DBSET SCRATCH IS FULL AND NEEDS TO BE EXPANDED.

So I thought to add as keyword : Sscr=50GB, but it's again the same problem :
How can I resolve these problems. Because when I resolved a problem, another problem is created by my solution.
I am looking forward your response.
Regards,

Tibo
1 REPLY

Re: How to improve the disk memory ?

Creator
Creator
If this run includes MFLUID try PARAM,VMOPT,2
Paul Blelloch, Ph.D.
Director, Aerospace Analysis
ATA Engineering, Inc.
11995 El Camino Real
San Diego, CA 92130
(858) 480-2065