NX Nastran/Simcenter Nastran/Femap is an advanced FEM solution that is superior when it comes to performance, accuracy, reliability and scalability. Simcenter Nastran has credible subsystems for linear and nonlinear structures, dynamics, sound/vibration, rotors, FSI, heat transfer, and design optimization. NX Nastran allows engineers and designers to explore a lot more designs within a very short time compared with building prototypes.