INVOPT
INVOPT, Option
Enables or disables inverse solving for
the current load step.
OptionEnables or disables inverse solving for a load step:
ON
—
Enable.
OFF
—
Disable and revert to forward solving (default).
Notes
Option = ON is valid only at the first load step of a static
analysis. Large-deflection effects must be enabled (NLGEOM,ON). The
unsymmetric solver (NROPT,UNSYM) is required and the program selects it
automatically.
After issuing INVOPT,ON, inverse solving remains in effect until INVOPT,OFF is issued. The solution then reverts to traditional forward solving (default).
This command cannot be issued during a restart. Option can only
be changed between load steps.
For more information, see Nonlinear Static Analysis with Inverse Solving in the Structural Analysis Guide.