The Nonlinear Parameters form requires somewhat different data depending on the type of analysis.
Material Nonlinearity Parameters area. The data in this area of the form is informational only. For nonlinear modal time-history (FNA) analysis, only link-object material nonlinearity is considered. For nonlinear static and nonlinear direct-integration time-history analysis, all link- and frame-object nonlinearity is considered.
Target-Force Iteration options.
Solution Control options. The solution control parameters are different for each type of analysis. See Solution Control for more information.
Click the Reset to Defaults button to restore the program default to the various options on the form.
For and explanation of how to display the Nonlinear Parameters form, click here,