NX Nastran DMAP Programmer's Guide - Kxcad.net

1425
SSG4
Updates static loads with inertial loads
SSG4 Updates static loads with inertial loads
Updates the static loads with inertial loads.
Format:
SSG4 PL,QR,PO,MR,MLR,DM,MLL,MOO,MOA,GOA,USET/
PLI,POI/
NOOSET $
Input Data Blocks:
PL Static load matrix reduced to the l-set.
QR Matrix of determinate support forces.
PO Static load matrix partitioned to the o-set.
MR Rigid body mass matrix (r-set by r-set)
MLR Mass matrix partition (l-set by r-set) from MTT.
DM Rigid body transformation matrix for the r-set to the l-set.
MLL Mass matrix reduced to the l-set.
MOO Mass matrix partitioned to the o-set from KFF.
MOA Mass matrix partition (o-set by a-set) from MFF.
GOA Omitted degree-of-freedom transformation matrix, o-set by a-set.
USET Degree-of-freedom set membership table for g-set.
Output Data Blocks:
PLI Static load matrix with inertial loads and reduced to the l-set.
POI Static load matrix with inertial loads and reduced to the o-set.
Parameter:
NOOSET Input-integer-no default. Number of degrees-of-freedom in the o-set or
omitted degree-of-freedom flag. Set to -1 if there are none.
Remarks:
1. SSG4 computes rigid body accelerations based on the reactions on the fictitious
supports. The inertia loads on the structure are proportional to these
accelerations.
2. All input and output matrices must be present if their corresponding degree-offreedom
set is present. If PLI is purged, then PL, MLR, and MLL may be purged.