There is many different possible settings to adjust the quality of a mesh in Inventor NASTRAN. In this post, I will present one of the most useful: Suppress Short Features.
You will need to adjust this parameter when a CAD part presents some narrow angle or small feature, like this one:
The problem is that by default, the mesher tries to stick to the topology of the CAD. By meshing this narrow angle, some elements will therefore have a bad aspect ratio. The “Suppress Short Feature/Min Feature Angle” settings control how much the nodes can deviate from the CAD.