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Alter to Calculate Interface Loads Across Superelement
Boundaries During Static Analyses


Alter Name     glforcea.v707


Purpose

Calculate superelement interface loads.


Solution Sequence

SOL 101.


Input
 
Executive Control

Include 'glforcea.v707'.
 
Case Control or Bulk Data

PARAM,SELOCAL,xx

where xx = superelement number for boundary force
calculation


Output

DMIG entries in the ".pch" file for the boundary forces.  There is one
column for each static loading condition.  These results may then be
used as input for detailed analysis of local components.


Limitations

The boundary forces are calculated only at the downstream
boundaries.  If boundary forces are needed from upstream
superelements, SELOCAL must be set to the upstream SEID to
generate the forces.


Sample Files

glforce1.dat    Two-headed flyswatter model with three loading
conditions.  This run finds the boundary forces on
superelement 1, the left face.


Additional Documentation

T. Rose, "Applications of Superelements in Global-Local Analysis,"
MSC/NASTRAN Application Note, September 1987.