NLPARM (Subcase Information Entry)

Subcase Information Entry

NLPARM - Data Selection

Description

The NLPARM command can be used to activate nonlinear solution methods for this subcase and to select the parameters used for Nonlinear Quasi-static Analysis, Geometric Nonlinear Implicit Analysis, and Nonlinear Direct Transient Analysis.

Format

NLPARM (lgdisp) = option

Argument

Options

Description

lgdisp

LGDISP

Default: See Comment 4

LGDISP: Large Displacement Nonlinear Static Analysis is activated for the subcase that contains this NLPARM entry.

option

< SID >

No default

SID: Set identification of an NLPARM bulk data entry.

Comments

1.	NLPARM bulk data entries will not be used unless selected in the Subcase Information section.

2.	If present above the first subcase, it is applied to all linear static subcases. Small displacement nonlinear analysis subcases, by their definition, will already have an NLPARM reference which is used.

3.	The NLPARM command is supported in quasi-static analysis, geometric nonlinear analysis, and optimization subcases. The LGDISP option is not supported for RADIOSS Integration via EXPDYN solution sequences.

4.	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.