NX Nastran DMAP Programmer's Guide - Kxcad.net

SOLVIT Iterative solver
SOLVIT
Iterative solver
Solves the matrix equation [A] [X] = ± [B] for [X] using a preconditioned conjugate
gradient method.
Format for global non-p-version solution:
SOLVIT A,B,XS,PC,USET,KGG,GM,SIL,EQEXIN,EDT,CASECC,EQMAP/
X,R,PC1,EPSSE/
SIGN/ITSOPT/ITSEPS/ITSMAX/IPAD/IEXT/ADPTINDX/
NSKIP/MSGLVL/PREFONLY/S,N,ITSERR/SEID $
Format for global p-version solution:
SOLVIT A,B,XS,PS,USET,USET0,SIL0,SIL,EQEXIN,EDT,CASECC,
EQMAP/
X,R,PG,EPSSE/
SIGN/ITSOPT/ITSEPS/ITSMAX/IPAD/IEXT/ADPTINDX/
NSKIP/MSGLVL/PREFONLY/S,N,ITSERR/SEID $
Input Data Blocks:
A Square matrix (real or complex, symmetric or unsymmetric).
B Rectangular matrix (real or complex), the right-hand side.
XS Optional starting vector, same type as B (may be purged).
PC Optional stepwise preconditioner, same type as A (may be purged).
USET Degree-of-freedom set membership table. See Remark 3.
KGG Stiffness matrix - g-set. See Remark 3.
GM Multipoint constraint transformation matrix. See Remark 3.
USET0 USET table from previous adaptivity index in p-version analysis.
SIL Scalar index list.
SIL0 SIL table from previous adaptivity index in p-version analysis.
EQEXIN Equivalence table between external and internal grid/scalar
identification numbers. Required for p-version preconditioning only.
EDT Table of Bulk Data entry images related to element deformation,
aerodynamics, p-element analysis, divergence analysis, and the
iterative solver.
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