Hi everyone,
I am currently running a pre-stressed modal analysis using Altair Optistruct. The first loadcase is a LGDISP non linear quasi static analysis and the second loadcase is a normal modes analysis which is PRETENS with loadcase#1.
The model comprises of friction, freeze and slide contacts, 2nd order tetrahedral elements, CBEAM elements and RBE2 elements.
Everything has been checked but something strange happens when I run it into Optistruct:
If I change the order of the tetrahedral elements from 2nd to 1st, I get the following error:
OptiStruct error termination report printed to file
'def_linear2.stat'.
PROGRAM STOPPED DUE TO ERROR.
NOTE # 1422
There were 1 automatic memory expansion(s).
(The result is not affected by this.)
************************************************************************
A fatal error has occurred during computations:
*** ERROR # 292 ***
Available working storage insufficient.
The strange thing is that if I run the 2nd order the simulation proceeds and starts as it should.
At first I corrected all RBE2 free-nodes and deleted any duplicate elements. Unfortunately, this keeps happening.
Please, I COULD USE some feedback asap.
If there is any need to share something, I would consider using file transfer. I am attaching the .out file.
Thank you in advance for your consideration.
Matteo
Unable to find an attachment - read this blog
