Subcase Information Entry Used to activate and select the control parameters for Nonlinear Static Analysis and Nonlinear Direct Transient Analysis.


NLCTRL = option


Argument Options Description
lgdisp <LGDISP>

For the default, see Comment 3.

Large Displacement Nonlinear Static Analysis is activated for the subcase that contains this NLCTRL entry.
option <SID>

No default

Set identification of a NLCTRL Bulk Data Entry.


  1. NLCTRL Bulk Data Entries are not used unless selected in a NLCTRL Subcase Information Entry.
  2. The NLCTRL Subcase Information Entry is supported in Nonlinear Static Analysis, Nonlinear Transient Analysis, and optimization subcases.
  3. If LGDISP is not specified as an argument to NLPARM in a subcase, Large Displacement Analysis is not activated for this subcase. However, if PARAM, LGDISP,1 is used, Large Displacement Analysis is activated for all subcases containing NLPARM in the model.
  4. The NLCTRL Bulk Data and Subcase Information Entries can be used instead of NLPARM Bulk Data and Subcase Information Entries as an alternate way to control nonlinear implicit convergence criteria. Both NLPARM and NLCTRL cannot be specified together in the same nonlinear implicit subcase.
  5. Detailed convergence check information for implicit nonlinear subcases, increments, and Newton-Raphson iterations are printed in the _nl.out file. Additional options for checking Nonlinear Analysis run information and monitoring progress of Nonlinear Implicit Analysis jobs are listed in Runtime Monitoring in the User Guide.