There are many aspects to building a finite element analysis model. In several cases, the forms used to create the finite element data are dependent on the selected analysis code and analysis type. Other parts of the model are created using standard forms.

The Analysis option on the Preferences menu brings up a form where the user can select the analysis code (e.g., MD Nastran) and analysis type (e.g., Structural).

The analysis code may be changed at any time during model creation.This is especially useful if the model is to be used for different analyses in different analysis codes. As much data as possible will be converted if the analysis code is changed after the modeling process has begun. The analysis option defines what will be presented to the user in several areas during the subsequent modeling steps.

These areas include the material and element libraries, including multi-point constraints, the applicable loads and boundary conditions, and the analysis forms. The selected Analysis Type may also affect the allowable selections in these same areas. For more details, see The Analysis Form (Ch. 2) in the MSC.Patran Reference Manual.