NX Nastran DMAP Programmer's Guide - Kxcad.net

BGP Processes geometry for boundary contact regions
BGP
Processes geometry for boundary contact regions
Processes the geometry for the boundary contact regions. Updates the penalty values
for slideline elements in the contact regions topological information table and creates
a new boundary grid point element connection table.
Format:
BGP CSTM,SIL,KGGT/
BTOPO,BGPECT/
ADPCON/ISKIP $
Input Data Blocks:
CSTM Table of coordinate system transformation matrices.
SIL Scalar index list.
KGGT Total structural stiffness matrix in g-size (sum of linear, nonlinear and
differential matrices).
Output Data Block:
BTOPO Contact regions topological information table.
BGPECT Boundary grid point element connection table.
Parameters:
ADPCON Input-real-default=1.0. Scale factor for adjusting penalty values on
restart. Update penalty values if positive.
ISKIP Input-integer-default=0. Counter to update penalty values; updates on
first pass and no update later.
Remarks:
1. CSTM may be purged.
2. BTOPO is both input and output. See example.
Example:
Excerpt of BGP for a nonlinear loop in SOL 106.
FILE BTOPSTF=APPEND/BTOPCNV=APPEND $
BGP CSTMS,SILS,KGGT/BTOPSTF,BGPECT/ADPCONx/ISKIP $
COPY BTOPSTF/BTOPCNV/-1/1 $
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