I was given a black box model (superelement) defined by mass and stiffness matrices in a DMIG. I would like to create a flex body from this model. I generated a mnf but the reported mass, center of mass, and inertia in ADAMS does not match that of the weight output generator in the f06 from NASTRAN nor what I know it should be. I have double checked my DTI, UNITS card and am wondering if some part of the mass is not getting into the model. However, the reported natural frequencies in ADAMS are correct.
