NX Nastran DMAP Programmer's Guide - Kxcad.net

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TRD2
Solves for modal/direct, transient, displacement, velocity, and acceleration solution
Output Data Blocks:
UXT Solution matrix from transient response analysis in d- or h-set.
PNL Nonlinear load matrix appended from each output time step.
TOL Transient response time output list.
Parameters:
SOLTYP Input-character-no default. Solution method.
'MODAL' Modal; usually for h-set matrices
'DIRECT' Direct; usually for d-set matrices
Remarks:
1. TRD2 is intended for design optimization.
2. NLFT and PNLD1 cannot be purged if nonlinear loads are selected in CASEXX.
3. NCOL>0 indicates a restart.
'IC' Initial conditions for nonlinear transient analysis
NOUE Input-integer-no default. Number of extra points. Set to -1 if there are
no extra points.
NONCUP Input-integer-default=0. 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.
NCOL Input/output-integer-default=0. Number of time steps in the solution
matrix UXT prior to execution of TRD1.
FAC3 Input-complex-default=(1.0,0.0). Negative of the reciprocal of the time
step increment.
TRD2OPT Input-integer-default=1. TRD2 output option.
1 Output based on TSTEP Bulk Data entry
2 Output based on every time step
SETNAME Input-character-default='H'. Degree-of-freedom set name represented
by KXX, etc. If KXX represents, or is a subset of, the d-set, then for
maximum efficiency, the rows and columns KXX and MXX must
correspond to or be a partition of the displacement set specified by
SETNAME. If KXX and MXX are a partition then PARTVEC must also
be specified.