Initial Conditions Nonlinear

Note:  At least one static nonlinear or time history load case must already be defined for this feature to be available.

Click the Analysis > Type > Static or Time History > New command to define a load case. Then repeat the command to view the initial conditions.

For nonlinear analyses, specify the initial conditions at the start of the analysis:

Important: An unlimited number of sequences or branches of nonlinear load cases can be created. However, be sure that the first case in every sequence or tree of nonlinear cases starts from Zero Initial Conditions.

When continuing from the state at the end of the nonlinear case, the following restrictions apply:

Note: When continuing from the state at the end of a nonlinear case, all applied loads specified for the present load case are incremental, i.e., they are added to the loads already acting at the end of the nonlinear case.

When considering a sequence of FNA cases, static loading may be applied by defining a case in which:

Note: Linear time-history load cases always start from Zero Initial Conditions.