Search found 12 matches

by Ozgun
Thu Jan 22, 2015 2:07 pm
Forum: OpenSees.exe Users
Topic: remove mp command issue
Replies: 2
Views: 2524

Re: remove mp command issue

i did not built it myself.I am using latest version of openseesSP.exe dowloaded from the website. and i am using my personal computer.
by Ozgun
Mon Jan 19, 2015 9:29 pm
Forum: OpenSees.exe Users
Topic: remove mp command issue
Replies: 2
Views: 2524

remove mp command issue

I am trying to remove equalDOF from the system i have but having the following error.

ShadowSubdomain::removeMP_Constraints() - not yet implemented.

I am using openseesSP. Is it possible to remove equalDOF ?

Thanks,

Ozgun
by Ozgun
Fri Dec 05, 2014 10:09 am
Forum: OpenSees.exe Users
Topic: problem with Manzari-Dafalias material
Replies: 11
Views: 10120

Re: problem with Manzari-Dafalias material

sanjianke wrote: > Ozgun wrote: > > can you try to play with alpha parameter and see if it works? > > I guess you meant the alpha value for defining SSPquadUP element. I just used the > formula given in the manual to compute it as alpha = 0.25*(h^2)/(den*c^2). Maybe I > can try to fix the issue by i...
by Ozgun
Fri Dec 05, 2014 9:55 am
Forum: OpenSees.exe Users
Topic: problem with Manzari-Dafalias material
Replies: 11
Views: 10120

Re: problem with Manzari-Dafalias material

sanjianke wrote: > Ozgun wrote: > > mhm, > > > > I think it is not a suggested value. 0.05 is used in the generic examples > > but you should use the Poisson's ratio that is valid for the problem you > > are working on. otherwise your gravity analysis does not end up with > > correct initial state o...
by Ozgun
Tue Dec 02, 2014 7:27 pm
Forum: OpenSees.exe Users
Topic: problem with Manzari-Dafalias material
Replies: 11
Views: 10120

Re: problem with Manzari-Dafalias material

mhm,

I think it is not a suggested value. 0.05 is used in the generic examples but you should use the Poisson's ratio that is valid for the problem you are working on. otherwise your gravity analysis does not end up with correct initial state of stress.
by Ozgun
Mon Dec 01, 2014 11:05 am
Forum: OpenSees.exe Users
Topic: problem with Manzari-Dafalias material
Replies: 11
Views: 10120

Re: problem with Manzari-Dafalias material

can you try to play with alpha parameter and see if it works?
by Ozgun
Sun Nov 30, 2014 9:51 pm
Forum: Parallel Processing
Topic: UpdateMaterialStage in OpenSeesSP
Replies: 28
Views: 30669

Re: UpdateMaterialStage in OpenSeesSP

hi brag006, Can you briefly explain the way you achieved to solve the problem you stated here? I am running site response analysis. Depending on the size of the problem, I am having the warning "WARNING: MaterialStageParameter::setDomain() - no effect with material tag 1". An this warning ...
by Ozgun
Fri Nov 28, 2014 1:31 pm
Forum: Parallel Processing
Topic: OpenSeesSP potential parallel computing problem
Replies: 0
Views: 2909

OpenSeesSP potential parallel computing problem

Hi, I am using Manzari-Dafalias model with parallel processor. I have a very simple 1 column of soil on which I am doing gravity loading and dynamic time history analysis and it works in sequential computing without any problem. When I run it in parallel computing using SuperLU solver, I am getting ...
by Ozgun
Mon Oct 06, 2014 11:32 am
Forum: Parallel Processing
Topic: Mumps Solver Problem
Replies: 4
Views: 8238

Re: Mumps Solver Problem

"why don't you mix the materials and elements to see where the problem is .." - I will try to do that. -------------------------------------------------------------------------------------------------------------------------- "those unbalanced forces do not look to be improving any so...
by Ozgun
Sun Oct 05, 2014 2:00 pm
Forum: Parallel Processing
Topic: Dafalias Manzari constitutive model in OpenSeesSP
Replies: 6
Views: 8978

Re: Dafalias Manzari constitutive model in OpenSeesSP

Dear all, I would like to ask if anybody used Dafalias-Manzari model with mumps solver. I am trying to use it and having issues about the speed and convergence. I am linking another topic in order not to duplicate the issue. http://opensees.berkeley.edu/community/viewtopic.php?f=7&t=61851&p=...
by Ozgun
Sun Oct 05, 2014 1:13 pm
Forum: Parallel Processing
Topic: Mumps Solver Problem
Replies: 4
Views: 8238

Re: Mumps Solver Problem

fmk, thanks for your reply. based on your suggestion, i have tried couple of different solvers with different time steps for gravity analysis. in some of trials i have kept both elastic and plastic stage for gravity analysis and for the others i have removed the plastic analysis just to be able to s...
by Ozgun
Thu Oct 02, 2014 4:47 pm
Forum: Parallel Processing
Topic: Mumps Solver Problem
Replies: 4
Views: 8238

Mumps Solver Problem

Dear all, I am using OpenSeesSP to take the advantage of parallel computing. I am using Mumps solver in my analyses. In my previous work, I have successfully run 3D simulations using brickUP elements with PressDependMultiYield model. Now I switched to Dafalias-Manzari model with SSPbrickUP element. ...