NX Nastran DMAP Programmer's Guide - Kxcad.net

SOLVIT
Iterative solver
5. The system cell SYSTEM (69) is equivalent to the SOLVE keyword and controls
some special options for the module:
SOLVE Action
2 Suppresses the user information message at each iteration.
8 Use alternative convergence criterion (less conservative
than default).
6. If data block PC1 is specified, the CPU time will increase slightly.
7. If SOLVIT is to be used for p-element analysis and ADPTINDX>1, then XS and
PC must be the solution matrix and pre-conditioner from the previous adaptivity
p-level. Also, the USET and SIL from the previous p-level are specified for U and
KGG and the USET and SIL from the current p-level are specified for GM and SIL.
8. For frequency response analysis with ITSOPT=10 or 11 (block incomplete
Cholesky), IEXT=0 is not available and IEXT=1 is used automatically.
Examples:
1. Solve [A][X]=[B] with Jacobi pre-conditioning with convergence established at
1.E-4 and maximum allowed iterations at 55 specified for the module parameters.
SOLVIT A,B,,,,,,,,,/X,,//1/1.E-4////-1 $
2. Same as 1 except parameters are obtained from the SMETHOD command and
ITER entry.
SOLVIT A,B,,,,,,,,EDT,CASECC/X,, $
3. Same as 2 except for p-version analysis.
DBVIEW SIL0 = SILS (WHERE PVALID=PVALOLD) $
DBVIEW UL0 = UL (WHERE PVALID=PVALOLD) $
DBVIEW USET0 = USET (WHERE PVALID=PVALOLD) $
DBVIEW PRECON0 = PRECON (WHERE PVALID=PVALOLD) $
SOLVIT KLL,PLI,UL0,PRECON0,USET,USET0,SIL0,SILS,
EQEXINS,EDT,CASES/
UL,RUL,PRECON///////ADPTINDX/NSKIP $
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