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Subject: Stiffness matrix conditioning number
Author: hattori_at_fem.unicamp.br
Date: 2008-04-14 21:30:45

Hello!

I need to get the condition number of the global stiffness matrix. I have
already tried:
- to get it by dumbing the stiffness matrix into a .txt file with HBMAT
command and then to calculate the eigenvalues, but that was not a viable
approach (stiffness matrix is way too big - over 120000 equations).
- in the result file of the Sparse solver, it appears a "condition number
estimate" value, but it is always zero (0.000000000D+00).

Does anyone know if there is a way to calculate the conditioning number of a
matrix directly in ANSYS?

Thanks for your attention,

Gabriel Hattori
Master Student
DMC - Departament of Mechanical Computation
FEM - Faculty of Mechanical Engineering
UNICAMP - State University of Campinas - Brazil

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