Parameter

Values

Description

PRESUBNL

<YES, NO>

Default = NO

Defaults:

If this parameter does not exist in the deck, the default behavior is NO.

If this parameter exists in the deck, however, if no value (YES/NO) is specified, the default behavior is NO.

PARAM, PRESUBNL, YES forces OptiStruct to run models, in which Linear Buckling Analysis or Preloaded Analysis is defined, in conjunction with nonlinear materials (MATS1, MATHE, or MGASK) or large displacement nonlinear analysis.

PARAM, PRESUBNL, NO does not allow Linear Buckling Analysis or Preloaded Analysis with nonlinear materials or large displacement nonlinear analysis to be defined and the solution errors out if such models are run.

Note: Linear Buckling Analysis or Preloaded Analysis is not recommended in models with nonlinear materials or large displacement nonlinear analysis. It is the user’s responsibility to interpret such results with caution.