nastran binary package in Ubuntu Xenial arm64

 NASTRAN is the NASA Structural Analysis System, a finite element analysis
 program (FEA) completed in the early 1970's. It was the first of its kind and
 opened the door to computer-aided engineering. Subsections of a design can be
 modeled and then larger groupings of these elements can again be modeled.
 NASTRAN can handle elastic stability analysis, complex eigenvalues for
 vibration and dynamic stability analysis, dynamic response for transient and
 steady state loads, and random excitation, and static response to concentrated
 and distributed loads, thermal expansion, and enforced deformations.

Source package