Nastran is an Autodesk Inventor add-on that provides powerful simulation functionality for multi-disciplinary structural analysis. The software analyses linear and nonlinear stress, dynamics and the heat transfer characteristics of structures and mechanical components.
Autodesk Nastran is driving simulation for the future of making things. New features in the 2016 version include the user-friendly interface, connector midpoints, the ability to mask components for the analysis and viewing frame models.
When you purchase a licence for Autodesk Nastran 2018, you also have the right to use the 2016 version. This is the only way, in the new licensing structure, to "buy" Nastran 2016 (further information on licensing).