NX Nastran DMAP Programmer's Guide - Kxcad.net

1249
NLTRD
Computes transient nonlinear analysis solution matrices and tables
USETD Degree-of-freedom set membership table for the p-set.
AM2 Damping matrix in the d-set for linear elements multiplied by the
negative of the time step delta.
AM3 Combined mass and damping matrix multiplied the square of the
reciprocal of the time step delta and the reciprocal of twice the time step
delta, respectively.
NLFT Nonlinear Forcing function table.
KSGG S-set by f-set matrix and s-set by s-set partitions of the material
nonlinear stiffness matrix and expanded to g-set size.
DITID Table of identification numbers in DIT.
Output Data Blocks:
ULNT Solution matrix from nonlinear transient response analysis in the d-set.
IFG Matrix of nonlinear element forces for the g-set at the output time
steps.
ESTNLH Nonlinear element summary table at converged step.
IFD Matrix of nonlinear element forces at constrained points at the output
time steps.
OESNL1 Table of nonlinear element stresses in SORT1 format.
PNL Nonlinear load matrix appended from each output time step.
TEL Transient response time output list appended from each subcase.
Parameters:
BETA Input-complex-default=(.33333,0.0). Integration parameter.
CONV Input/output-integer-default=1. Nonlinear analysis convergence flag.
On input:
0 Initialization
On output:
-1 Convergence has not been achieved.
1 Convergence has been achieved.
STIME Input/output-real-default=0.0. On initial input, starting time step and
on output, accumulated time used for restarts.
NEWP Output-integer-default=1. New subcase flag.