Search found 173 matches

by brag006
Wed May 25, 2016 2:07 pm
Forum: Parallel Processing
Topic: Large Model
Replies: 1
Views: 1818

Large Model

Hi Everyone, I have a relatively large model that is taking approximately 12 days to run on a cluster. Unfortunately I'm not actually utlising the full capabilities of the cluster because I don't know how to run this large model using multiple processors. Basically I successfully use OpenSeesMP for ...
by brag006
Tue Apr 05, 2016 2:15 pm
Forum: Parallel Processing
Topic: OpenSeesMP with Mumps
Replies: 5
Views: 2828

Re: OpenSeesMP with Mumps

Thanks for that, your work is much appreciated.

Do you have any advice on temporary solutions? Time is of the essence and this is a really big obstacle for me.

Any suggestions would be much appreciated.

Regards,
by brag006
Mon Apr 04, 2016 9:30 pm
Forum: Parallel Processing
Topic: OpenSeesMP with Mumps
Replies: 5
Views: 2828

Re: OpenSeesMP with Mumps

Any suggestions on solving this problem? It seems to be a weird and I can't find the source of the problem
by brag006
Sun Apr 03, 2016 10:58 pm
Forum: Parallel Processing
Topic: OpenSeesMP with Mumps
Replies: 5
Views: 2828

OpenSeesMP with Mumps

Hi, I am running an analysis using OpenSeesMP on a cluster and using the Mumps solver. I am getting the following error: WARNING MumpsParallelSolver::solve(void)- Error -9 returned in substitution dmumps() Work array too small; use -ICNTL14 option, the default is -ICNTL 20 make 20 larger The interes...
by brag006
Tue Oct 07, 2014 6:16 pm
Forum: OpenSees.exe Users
Topic: BeamContact2D
Replies: 3
Views: 898

Re: BeamContact2D

Also is it possible to fix the element so it does work in a transient analysis? If so, any guidance with that would be much appreciated.
by brag006
Tue Oct 07, 2014 6:12 pm
Forum: OpenSees.exe Users
Topic: BeamContact2D
Replies: 3
Views: 898

Re: BeamContact2D

Thank for the prompt reply professor. Do you have any recommendations for the kind of interface elements I could use in my model of a wharf. I am developing a 2D model including the soil domain (SSPQuad) and the wharf (dispBeamColumn). How can I capture the response at the interace?
by brag006
Tue Oct 07, 2014 1:05 pm
Forum: OpenSees.exe Users
Topic: BeamContact2D
Replies: 3
Views: 898

BeamContact2D

Does anyone have any experience with using the BeamContact2D element in a transient analysis? I have been having significant issues trying to get it to work at the interface between piles and surrounding soil. I have been having convergence issues even though I have tried a wide variety of changes t...
by brag006
Tue Sep 02, 2014 8:11 pm
Forum: OpenSees.exe Users
Topic: Triangular Shell Elements
Replies: 4
Views: 967

Re: Triangular Shell Elements

I only have the problem with a 778 triangular elements out of 9443 total elements. I thought it might be possible to create the triangular nodes and elements in a ndm 2 ndf 2 system and then constraint them using equalDOF in the 1 and 2 direction to duplicate nodes in the ndm 3 ndf 6 system which wi...
by brag006
Tue Sep 02, 2014 8:05 pm
Forum: OpenSees.exe Users
Topic: Triangular Shell Elements
Replies: 4
Views: 967

Re: Triangular Shell Elements

I tried that but I am getting singularity issues. Here's the error when I assign Mumps for sys_of_eqns WARNING MumpsParallelSolver::solve(void)- Error -10 returned in substitution dmumps() cause: Matrix is Singular Numerically and when using BandGeneral: WARNING BandGenLinLapackSolver::solve() -LAPA...
by brag006
Sun Aug 31, 2014 5:31 pm
Forum: OpenSees.exe Users
Topic: Triangular Shell Elements
Replies: 4
Views: 967

Triangular Shell Elements

Hi, I have a gate that has already been meshed using another structural analysis software and contains quadrilateral and triangular plate elements. In converting the input files from this software to OpenSees I have found that there appears to be no triangular shell elements. Are there any elements ...
by brag006
Mon Aug 11, 2014 1:42 pm
Forum: OpenSees.exe Users
Topic: Recorder Error?
Replies: 4
Views: 784

Recorder Error?

Hi,

Just checking what the purpose of this output in NodeRecorder.cpp on line 804

opserr << "NodeRecorder::initialize - numNodes: " << numNodes << endln;

It's coming up in one of my analyses and not sure if it is an 'error' or not
by brag006
Thu Jun 05, 2014 12:20 pm
Forum: Parallel Processing
Topic: New Error
Replies: 1
Views: 1075

New Error

I am not sure if this is an error or not, but I am getting this message when I run a large model on OpenSeesSP on a cluster using several processors:

You just increased the maxndoms: 5 4


Does this have any meaning? It comes when I run 8 processes for example but not when I run 10.
by brag006
Tue Mar 04, 2014 3:37 pm
Forum: OpenSees.exe Users
Topic: Choice of test command
Replies: 2
Views: 1141

Choice of test command

I am facing convergence problems and I developed some code to try out different soultion algorithms and in most cases that works fine. However for a small number of simulations I am still not converging even after decreasing the timestep. In some cases changing the convergence test resulted in conve...
by brag006
Tue Mar 04, 2014 3:34 pm
Forum: Parallel Processing
Topic: race conditions
Replies: 3
Views: 1534

Re: race conditions

I only get memory corruption problems when I use mumps. I changed to umfpack and no longer memory problems. Any thoughts on why could that be? I tried using the -intcl14 option but no luck.
by brag006
Mon Mar 03, 2014 2:01 pm
Forum: Parallel Processing
Topic: race conditions
Replies: 3
Views: 1534

race conditions

I am running a medium size model through approximately 100 eq motions and using OpenSeesMP to run multiple processes. I used code similar to the example provided with the source code. After many days of having random errors related to memory (glibc errors) it appears I have a race condition. I read ...