Creating Midsurface in NX Nastran

You can simplify your geometry for analysis by creating a midsurface. The midsurface tool generate an middle surface between pairs of surfaces selected. After generating the midsurface, you can use it to perform analysis directly and apply uniform shell meshing.

Below the figure shows the master part shown with default thickness, and the next figure shows the part after creating the midsurface.

Master Part

Master Part After Creating Midsurface