XANSYS Message: 34714 [Go back to message list] [bookmark on del.icio.us]
No rating yet Subject: Re: Regarding substructuring Author: Somesh J. Ghunakikar Date: 2002-03-08 21:57:00Again we have a confusion. I have a big volume having 90000 elements. I have selected only boundary nodes those are around 3000. I have around 9000master dof's. But the system is creating a huge page file and its not solving in the gereration pass.
Thanks
Regards
Somesh
At 09:04 AM 3/7/02 -0500, you wrote: > I 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.