XANSYS Message: 34658 [Go back to message list] [bookmark on del.icio.us]
No rating yet Subject: Re: Regarding substructuring Author: John Swanson Date: 2002-03-07 09:04:00I don't understand "the frontal solver can solve only 50000 DOFs" - there is no such limit. Perhaps you mean what the solver can only handle 50000 master DOFs? If so, this sounds like an extremely large number. Is it possible that you have set all DOFs to be masters rather than just some boundary or loading nodes? John Swanson Swanson Analysis Services, Inc.
> -----Original Message----- > From: Somesh J. Ghunakikar [SMTP:someshjg@i...] > Sent: Thursday, March 07, 2002 9:11 PM > To: xansys > Subject: RE: [xansys] Regarding substructuring
> I have a single volume meshed with 50000 elements, I can not solve in > generation pass, its coming out by giving watson error. Since the frontal > solver can solve only 50000 DOF's. The problem is I can not divide the > volume also. > Again in the use pass, while solving its taking only frontal solver. But I > need atleast sparse. I need an iterative solver in the use pass. How I can > do it.
> Thanks
> Regards
> Somesh
> IEL, Hyd. > India
> At 08:01 AM 07/03/2002 -0500, you wrote: > > A slightly longer answer is that substructure generation is a partial > >factoring of the set > >of equations, down to the set of Master DOFS. The other solvers in > ANSYS, > >both iterative > >and direct, do not have this capability, which leaves you with the > frontal > >solver. > > Direct solvers might be modified to have this capability (Sparse, for > >example), but I have > >not seen any research on how this might be done with an iterative solver. > >John Swanson > >Swanson Analysis Services, Inc.
> >> -----Original Message----- > >> From: Bohlen, Dan (GEAE) [SMTP:dan.bohlen@a...] > >> Sent: Wednesday, March 06, 2002 11:33 AM > >> To: 'xansys ' > >> Subject: RE: [xansys] Regarding substructuring
> >> I believe the short answer is: you can't.
> >> -----Original Message----- > >> From: Somesh J. Ghunakikar [mailto:someshjg@i...] > >> Sent: Tuesday, March 05, 2002 6:14 PM > >> To: xansys > >> Subject: [xansys] Regarding substructuring
> >> Dear Users > >> In substructuring , the generation pass has only frontal solver? How > we > >> can change the solver instead of frontal in generation pass.