Tutorial OS-T 1600
Altair EmployeeHello,
i tried to solve the Optistruct OS-T 1600 Tutorial, but after starting the two solvers (optistruct, acusolve) there is a convergence error of acusolve that stops the job:
Messages for the job:
*** ERROR # 5202 ***
Acusolve stops before FSI iteration achieves convergence.
*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.
Does anyone knows the problem? I checked all steps of the tutorial and start it again, but the error still appears.
The next step was to change the exchange parameter of acusolve (min/max_stagger_iterations) and optistruct (min/maxEX) to 30. A Simulation of the Tutorial with only 0.02s worked.
To simulate the tutorial 0.1s or the whole 1s - as it is described in the Tutorial- still doesn´t work with a value of 100 for max_stagger and MAXEX. Another error appeared:
<?xml version="1.0" encoding="UTF-8"?>
Does anyone has got experience with the tutorial OS-T 1600 and solved it successfull?
Thank you very much in advance.
Answers
-
Hi @N_R could you please share the entire .out file with us?
0 -
Hi @Prakash Pagadala
Yes, of course. I hope it is the following:If it is not the right one, please tell me.
Thank you.0 -
everything alright. I changed a few parameter in Optistruct and it seems to work.
I missunderstand an instruction in the tutorial.Thank you nonetheless.
0 -
Thank you for the update.
I am running the same model on my end and so far no issues were seen.
0 -
Hello Prakash,
I tried to built up an own FSI Problem and i got the same error as written April, 23.
What does this error generally means? What´s the problem?*** ERROR # 3423 ***
MUMPS solver encountered error with code -6.
please contact support and provide .out and .stat files.
*** INTERNAL PROGRAMMING ERROR ***
in file 'nltranend.F', at location # 364.
**** ABORTING RUN DUE TO AN INTERNAL ERROR ****Thank you in advanve.
0 -
0
-
0
-
Hi
I want to do tutorial OS-T 1600 FSI but in creating contact surface, when I click on '0 elements > elements' I cannot pick all the faces of the beam. When I select all the faces nothing happens and if I click on add, the message 'No new elements have been selected' appears. Could you please let me know how to select all the faces? Do I need to have 'all shell faces' or 'all solid faces'?
In fact I managed the problem. It needs to have 'all solid faces' to select elements.
0 -
Hi,
Can you change to 'add solid faces' and check if that helps?
<?xml version="1.0" encoding="UTF-8"?>
0 -
Hi Prakash
Could you please look at attached error file and let me know how to manage the problem? There are several issues need to be fixed.
Thank you.
0 -
I think this is the problem...
*** WARNING # 9113
It appears that the directory used for scratch files:
/home/ac7754/fsi_slab_1/
is located on remote filesystem.
This could result in very slow solver performance.
Number of CPU processors : 32If possible share the model file to debug...
0 -
Hi Prakash
Please find the model file in attachment.
Thanks & regards
0 -
Hi Prakash
Do you have a copy of FSI_AS_MANIFOLD.inp and
FSI_OS_MANIFOLD.fem,please?Thank you.
0 -
Altair Forum User said:
Hi Prakash
Please find the model file in attachment.
Thanks & regards
I am able to reproduce the same but with a different warning message, I will get back to you with more details ASAP
0 -
Altair Forum User said:
Hi Prakash
Do you have a copy of FSI_AS_MANIFOLD.inp and
FSI_OS_MANIFOLD.fem<span></span>,please?Thank you.
Can you give me the reference to the document about the files?
0 -
Hi Prakash
I found the files. Thank you.
0 -
Hi Prakash
Are you running 'Slab.fem' on one single PC, please? When I did it there is a crash in simulation.
Thank you.
0 -
Hi Prakash
Is it possible to look at attached file and let me know how to manage the problem, please?
It is OS-T: 1610 Thermal Fluid-Structure Interaction Analysis on a Manifold.
Thank you.
**** ABORTING RUN DUE TO UNEXPECTED ERROR CONDITION ****
Error output from the solver:
==============================External Code via CCI: *** ASSERTION in Function <cciNew> File <linux64/src/cci.c> Line <152>
External Code via CCI: *** Did not receive connection request from client after waiting for 2400 sechwsolver.mesg output from the solver:
==============================
**** ABORTING RUN DUE TO UNEXPECTED ERROR CONDITION ****
optistruct:: Solver run finished after 40 minutes.
0 -
Hi @Question
I am checking with experts regarding the same. Looks like the FSI part has some problem.
0 -
Hi Prakash
When I run both tutorials OS-T 1600 and 1610, there is the following error.
acuSolve: *** ASSERTION in Function <ecdSetFatalError> File <ecd.c> Line <4208>
acuSolve: *** unable to match with external surface at 7 quadrature points
acuRun: *** ERROR: error occurred executing acuSolve
Could you please let me know how to manage it?
Thank you.
0 -
Hi,
I have shared test files with experts. I will share the feedback ASAP
0 -
Hi Prakash
I want to run an implicit simulation on a model with around 6 million elements. I set up the simulation as plate model in implicit analysis. However there are the following errors in my run. How can I solve that problem, please?
*** ERROR # 4002 ***
Running RADIOSS engine, 1 ERROR and 0 WARNINGs have been detected.
ANALYSIS COMPLETED.
*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
************************************************************************
A fatal error has occurred during computations:
*** ERROR # 4002 ***
Running RADIOSS engine, 1 ERROR and 0 WARNINGs have been detected.
ANALYSIS COMPLETED.
*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.
************************************************************************
Errors reported during program executionhwsolver.mesg output from the solver:
==============================
*** ERROR # 4002 ***
Running RADIOSS engine, 1 ERROR and 0 WARNINGs have been detected.
ANALYSIS COMPLETED.
*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
*** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.Solver FAILED
optistruct:: Solver run finished after 2 hours (10117 seconds).
Thank you.0 -
Hi,
What type of analysis is it?
Can you try with NLSTAT with LGDISP instead?
0 -
Hi
It is a NLGEOM implicit static analysis as you did for a plate. I set up my model as the plate one. The plate model is in attachment.
Is NLSTAT with LGDISP different than NLGEOM one, please?
Thank you.
0 -
Yes, NLGEOM uses RADIOSS block in the background.
You can refer to this tutorial for NLSTAT large displacement OS-T: 1520 Finite Sliding of Rack and Pinion Gear Model
0 -
My model is a cylinder under internal pressure. The cylinder is fixed in three supports along the length and the material is steel. According to physics of the model, I think there is no large displacement in that model. Do you think it needs to be run with NLSTAT large displacement? How about running with nonlinear material simulation?
0 -
Hi,
If the problem doesn't involve any large displacement, you can just try with NLSTAT where materail nonlinearity will be taken care.
Regarding FSI models, I am waiting for experts view. But from .cci file I can see that the solver couldn't make a connection after 2400 secs
0 -
Hi
How can I have just NLSTAT without large displacement?
Thank you.
0 -
Follow the same process shown in tutorial, but don't add PARAM>>LGDISP and in load case refer NLPARAM card in just NLPARM AND NOT TO NLPARM(LGDISP)
0 -
Do I follow OS-T: 1520 Finite Sliding of Rack and Pinion Gear Model or OS-T: 1500 Nonlinear Implicit Analysis of Bending of a Plate?
0
