NX Nastran DMAP Programmer's Guide - Kxcad.net

1040
FRRD1
Solves for the steady-state frequency response displacement solution
USETD Degree-of-freedom set membership table for the p-set. Required for
maximum efficiency during symmetric decomposition and if KXX
represents the d-set or a subset of the d-set (SETNAME='D').
PARTVEC Partitioning vector with values of 1.0 at the rows corresponding to
degrees of freedom which were eliminated in the partition to obtain
KXX, etc. Required for maximum efficiency during symmetric
decomposition and if KXX represents a subset of the d-set
(SETNAME='D'). PARTVEC is not required if KXX represents the h-set.
See SETNAME parameter description below.
Output Data Blocks:
UXF Solution matrix from frequency response analysis in d- or h-set.
FOLT Frequency response frequency output list with first frequency
truncated if first frequency is zero. UXF is also similarly truncated.
Parameters:
SOLTYP Input-character-no default. Solution method.
'MODAL'modal; usually for h-set matrices
'DIRECT'direct; usually for d-set matrices
NONCUP Input-integer-no default. Algorithm selection. NONCUP=-1 requests
uncoupled algorithm if SOLTYP='MODAL' and KXX, BXX, and MXX
are diagonal. NONCUP=-2, requests uncoupled algorithm and offdiagonal
terms of KXX, BXX, and MXX will be ignored.
ITSEPS Input-integer-default=0. Power of ten for convergence parameter
epsilon for iterative solution method.
ITSMAX Input-integer-default=0. Maximum number of iterations for iterative
solution method.
NSKIP Input-integer-default=1. Record number of current subcase in CASECC
and used only if the SMETHOD command selects the ITER Bulk Data
entry which specifies values for the desired iteration parameters. If
NSKIP=-1 then CASECC is not required and the values are taken from
the module specification of the values.
ZFREQ Input-integer-default=0. Zero frequency truncation selection. If set to 1
then the zero frequency, if any, will be truncated from UXF and FOL.
FIRSTBAD Output-logical-default=FALSE. Zero frequency truncation flag. Set to
TRUE if first frequency is truncated.