What you are seeing are the files associated with Nastran explicit nonlinear solution (sol700).
You can find documentation for this in the Nastran documentation. It does require a different license to the linear solution.
It is based on Dytran but these files (in the Nastran folders) do not provide a standalone Dytran install. The full install of Dytran is available on the solution download center as a separate product and has a different licensing set to Nastran.
What you are seeing are the files associated with Nastran explicit nonlinear solution (sol700).
You can find documentation for this in the Nastran documentation. It does require a different license to the linear solution.
It is based on Dytran but these files (in the Nastran folders) do not provide a standalone Dytran install. The full install of Dytran is available on the solution download center as a separate product and has a different licensing set to Nastran.