NX Nastran DMAP Programmer's Guide - Kxcad.net

MATMOD
Matrix modification
If P3 > 0, the 6 x 6 single-precision matrix will be the transformation matrix from
the coordinate system with the coordinate ID = P3 to the basic system. If P3 points
to a cylindrical or spherical coordinate system, then the transformation location
is at the origin of the P3 system. Scalar and extra points contain 1.0.
If P3 = -1, the 6 x 6 single-precision matrix will be the global-to-basic
transformation for each grid point. Scalar and extra points contain 1.0.
2. If SIL is purged, the MATMOD uses LUSET for the size of the g-set. The
assumption is made that only grids exist in the g-set. LUSET must not be zero if
SIL is purged.
Examples:
Transform KGG to another coordinate system.
1. Assume TRANS to be a 6 x 6 transformation matrix and KGG was formed using
only one coordinate system (global coordinate system is the same at each grid
point). Transform KGG using TRANS.
MATMOD TRANS,SIL,,,,/TRANSG,/5 $
TRNSP TRANS/TRANSGT $
SMPYAD TRANSG,KGG,TRANSGT,,,/KGGPRIME/3 $
2. Assume KGG was formed using coordinate system 10 as the global coordinate
system for all grid points. Transform KGG to the basic coordinate system.
MATMOD CSTM,SIL,,,,/TRANSG,/5//10 $
TRNSP TRANSG/TRANSGT $
SMPYAD TRANSG,KGG,TRANSGT,,,/KGGBASIC/3 $
3. Assume KGG was formed using arbitrary coordinate systems as the global
coordinate system for each grid point. Transform KGG to the basic coordinate
system.
MATMOD CSTM,SIL,BGPDT,,,/TRANSG,/5//-1 $
TRNSP TRANSG/TRANSGT $
SMPYAD TRANSG,KGG,TRANSGT,,,/KGGBASIC/3 $
Transform KGGBASIC coordinate system 10.
MATMOD CSTM,SIL,,,,/TRANS10,/5//10 $
TRNSP TRANS10/TRANST10T $
SMPYAD TRANS10T,KGGBASIC,TRANS10,,,/KGG10/3 $
Option P1 = 6
Find the maximum absolute value for each row over all columns of a matrix.
Format:
MATMOD I1,,,,,/O1,/6 $
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