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Subject: Re: ANSYS5.6 Errors in SuperElement Modal w/sparse solve r
Author: Johan Hsu
Date: 2000-01-26 16:48:00Sir, thanks for the suggestion. I will try to re-run with the suggestion.
Currently, I used the subspace/w frontal solver option and it seems run along
fine so far. Again, thanks for the suggestion.
Johan Hsu
Siemens Westinghouse Power Corp.
To: Johan Hsu/Orlando/PGBU/WEC/US@W...
cc:
> -----Original Message-----
> From: Charles Rajakumar
> Sent: Wednesday, January 26, 2000 11:04 AM
> To: John Swanson
> Subject: RE: [xansys] ANSYS5.6 Errors in SuperElement Modal w/sparse
> solver
> John,
> I would try running it in two or more steps since the number of modes
> requested is large (1000).
> Extract, say, 250 modes in the first run. In the second run, extract the
> next 250 modes by
> specifying a shift point slightly below the highest freq. extracted in the
> previous run. Continue
> the steps till the desired number of modes are found.
> Kumar
> 1/26/2000
> -----Original Message-----
> From: John Swanson
> Sent: Tuesday, January 25, 2000 2:38 PM
> To: Charles Rajakumar
> Subject: FW: [xansys] ANSYS5.6 Errors in SuperElement Modal w/sparse
> solver
> Can you offer any suggestions?
> John Swanson
> -----Original Message-----
> From: Johan.Hsu@s... [SMTP:]
> Sent: Tuesday, January 25, 2000 12:23 PM
> To: xansys@o...
> Subject: [xansys] ANSYS5.6 Errors in SuperElement Modal w/sparse
> solver
> From: Johan.Hsu@s...
> Hello everyone. Does anybody have experienced the problem with the super
> element modal analysis? The first problem is FULL DISK I/O in writing the
> .full
> file. By issuing /config,fsplit command, the problem solved. However,
> the
> second problem seems link with sparse solver. It crashed ANSYS with the
> following error message: (The problem happened when the second LNxx file
> created. I had almost 100GB disk space available when it happened) Any
> clue or
> working around? TIA
> Johan Hsu
> Siemens Westinghouse Power Corp.
> Orlando, Florida
> Estimated number of active DOF= 88563.
> Maximum wavefront= 6032.
> Time at end of matrix assembly CP= 1915.72998.
> BLOCK LANCZOS CALCULATION OF UP TO 1000 EIGENVECTORS.
> NUMBER OF EQUATIONS = 88563
> MAXIMUM WAVEFRONT = 6032
> MAXIMUM MODES STORED = 1000
> MINIMUM EIGENVALUE = 0.
> MAXIMUM EIGENVALUE = 2500.0
> EST. OF MEMORY NEEDED = 2372.4 (MB)
> MEMORY AVAILABLE FOR EIGENSOLVER = 549.32 (MB)
> *** ERROR *** CP= 4519.900 TIME= 12:16:25
> An unexpected error ( Segmentation Violation ) has occurred... ANSYS
> internal data has been corrupted. ANSYS is unable to recover and will
> terminate.
> Previously saved files are unaffected.
> Current ANSYS Traceback:
> xdslor
> lanbcs4
> svkan2
> solvcl
> ANSYS