this is a quite late answer, but the reason you do not get an answer here, is that this is not the right forum.
There is no chance to do a vibration fatigue analysis with NASTRAN alone.
Vibration fatigue typically has two diffrent loading conditions:
random excitations (defined by a power spectrum density of a load)
deterministic (sine waves resp. sine sweeps).
From these loads NASTRAN can only calculate the transfer functions to e.g. local stresses (in the case of random excitations again a statistical deccription by a PSD). from this a special calculation tool has to estimate the local stress smplitudes and them estimate fatigue. The latter step is implemented in fatigue software tools.
Both types of loads can be handled by LMS Virtual.Lab Vibration Fatigue. The random one also by FE-Fatigue.
