You can use the Step module to change the analysis procedure. The submodel can use either a general procedure or a linear perturbation procedure. For more information, see About Submodeling.
In the Load module you must remove any loads, boundary conditions, or initial conditions that were applied to regions of the global model that were removed.
If a boundary condition is applied outside the region to which you applied the submodel boundary condition, you must ensure that it corresponds to the loading of the global model.
Similarly, if a load is applied to the submodel, you must ensure that it corresponds to the loading of the global model.
In most cases you will apply a more refined mesh to the submodel in the Mesh module. You can change the element type assigned to the submodel; however, you cannot change the dimensionality. Both the global model and the submodel must be either two-dimensional or three-dimensional.
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